diff --git a/MAINTAINERS b/MAINTAINERS
index 6c20a6d338f09ec83a6f9d7d05c931cfc54b1e9e..67094ea529ba2487f8c2fd7d8b642834aadd9b1d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5843,6 +5843,15 @@ T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/gpu/xen-front.rst
F: drivers/gpu/drm/xen/
+DRM DRIVERS FOR XILINX
+M: Hyun Kwon <hyun.kwon@xilinx.com>
+M: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+L: dri-devel@lists.freedesktop.org
+S: Maintained
+T: git git://anongit.freedesktop.org/drm/drm-misc
+F: Documentation/devicetree/bindings/display/xlnx/
+F: drivers/gpu/drm/xlnx/
+
DRM DRIVERS FOR ZTE ZX
M: Shawn Guo <shawnguo@kernel.org>
L: dri-devel@lists.freedesktop.org
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index c4fd57d8b717cefe95042561a1f9c3ac24775d82..147d61b9674ea119bd66327095dd04cf6b802a2d 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -386,6 +386,8 @@ source "drivers/gpu/drm/mcde/Kconfig"
source "drivers/gpu/drm/tidss/Kconfig"
+source "drivers/gpu/drm/xlnx/Kconfig"
+
# Keep legacy drivers last
menuconfig DRM_LEGACY
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 2c0e5a7e595362a5176a148d6d8d2770fd891804..1465b746f1f38c314ca0f5b022f4fc8a1f517fa6 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -123,3 +123,4 @@ obj-$(CONFIG_DRM_PANFROST) += panfrost/
obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
obj-$(CONFIG_DRM_MCDE) += mcde/
obj-$(CONFIG_DRM_TIDSS) += tidss/
+obj-y += xlnx/
diff --git a/drivers/gpu/drm/xlnx/Kconfig b/drivers/gpu/drm/xlnx/Kconfig
new file mode 100644
index 0000000000000000000000000000000000000000..aa6cd889bd119f726531a23cc2392a352f901334
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/Kconfig
@@ -0,0 +1,13 @@
+config DRM_ZYNQMP_DPSUB
+ tristate "ZynqMP DisplayPort Controller Driver"
+ depends on ARCH_ZYNQMP || COMPILE_TEST
+ depends on COMMON_CLK && DRM && OF
+ select DMA_ENGINE
+ select DRM_GEM_CMA_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_KMS_HELPER
+ select GENERIC_PHY
+ help
+ This is a DRM/KMS driver for ZynqMP DisplayPort controller. Choose
+ this option if you have a Xilinx ZynqMP SoC with DisplayPort
+ subsystem.
diff --git a/drivers/gpu/drm/xlnx/Makefile b/drivers/gpu/drm/xlnx/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..51c24b72217b8ef9237614d08454b816c179db8c
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/Makefile
@@ -0,0 +1,2 @@
+zynqmp-dpsub-y := zynqmp_disp.o zynqmp_dpsub.o zynqmp_dp.o
+obj-$(CONFIG_DRM_ZYNQMP_DPSUB) += zynqmp-dpsub.o
diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.c b/drivers/gpu/drm/xlnx/zynqmp_disp.c
new file mode 100644
index 0000000000000000000000000000000000000000..a455cfc1bee53ff0ba2b0c353c5538c28c7bd59f
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.c
@@ -0,0 +1,1697 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP Display Controller Driver
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_atomic_uapi.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_framebuffer.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_plane.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_vblank.h>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_dma.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/spinlock.h>
+
+#include "zynqmp_disp.h"
+#include "zynqmp_disp_regs.h"
+#include "zynqmp_dp.h"
+#include "zynqmp_dpsub.h"
+
+/*
+ * Overview
+ * --------
+ *
+ * The display controller part of ZynqMP DP subsystem, made of the Audio/Video
+ * Buffer Manager, the Video Rendering Pipeline (blender) and the Audio Mixer.
+ *
+ * +------------------------------------------------------------+
+ * +--------+ | +----------------+ +-----------+ |
+ * | DPDMA | --->| | --> | Video | Video +-------------+ |
+ * | 4x vid | | | | | Rendering | -+--> | | | +------+
+ * | 2x aud | | | Audio/Video | --> | Pipeline | | | DisplayPort |---> | PHY0 |
+ * +--------+ | | Buffer Manager | +-----------+ | | Source | | +------+
+ * | | and STC | +-----------+ | | Controller | | +------+
+ * Live Video --->| | --> | Audio | Audio | |---> | PHY1 |
+ * | | | | Mixer | --+-> | | | +------+
+ * Live Audio --->| | --> | | || +-------------+ |
+ * | +----------------+ +-----------+ || |
+ * +---------------------------------------||-------------------+
+ * vv
+ * Blended Video and
+ * Mixed Audio to PL
+ *
+ * Only non-live input from the DPDMA and output to the DisplayPort Source
+ * Controller are currently supported. Interface with the programmable logic
+ * for live streams is not implemented.
+ *
+ * The display controller code creates planes for the DPDMA video and graphics
+ * layers, and a CRTC for the Video Rendering Pipeline.
+ */
+
+#define ZYNQMP_DISP_AV_BUF_NUM_VID_GFX_BUFFERS 4
+#define ZYNQMP_DISP_AV_BUF_NUM_BUFFERS 6
+
+#define ZYNQMP_DISP_NUM_LAYERS 2
+#define ZYNQMP_DISP_MAX_NUM_SUB_PLANES 3
+
+/**
+ * struct zynqmp_disp_format - Display subsystem format information
+ * @drm_fmt: DRM format (4CC)
+ * @buf_fmt: AV buffer format
+ * @bus_fmt: Media bus formats (live formats)
+ * @swap: Flag to swap R & B for RGB formats, and U & V for YUV formats
+ * @sf: Scaling factors for color components
+ */
+struct zynqmp_disp_format {
+ u32 drm_fmt;
+ u32 buf_fmt;
+ u32 bus_fmt;
+ bool swap;
+ const u32 *sf;
+};
+
+/**
+ * enum zynqmp_disp_id - Layer identifier
+ * @ZYNQMP_DISP_LAYER_VID: Video layer
+ * @ZYNQMP_DISP_LAYER_GFX: Graphics layer
+ */
+enum zynqmp_disp_layer_id {
+ ZYNQMP_DISP_LAYER_VID,
+ ZYNQMP_DISP_LAYER_GFX
+};
+
+/**
+ * enum zynqmp_disp_layer_mode - Layer mode
+ * @ZYNQMP_DISP_LAYER_NONLIVE: non-live (memory) mode
+ * @ZYNQMP_DISP_LAYER_LIVE: live (stream) mode
+ */
+enum zynqmp_disp_layer_mode {
+ ZYNQMP_DISP_LAYER_NONLIVE,
+ ZYNQMP_DISP_LAYER_LIVE
+};
+
+/**
+ * struct zynqmp_disp_layer_dma - DMA channel for one data plane of a layer
+ * @chan: DMA channel
+ * @xt: Interleaved DMA descriptor template
+ * @sgl: Data chunk for dma_interleaved_template
+ */
+struct zynqmp_disp_layer_dma {
+ struct dma_chan *chan;
+ struct dma_interleaved_template xt;
+ struct data_chunk sgl;
+};
+
+/**
+ * struct zynqmp_disp_layer_info - Static layer information
+ * @formats: Array of supported formats
+ * @num_formats: Number of formats in @formats array
+ * @num_channels: Number of DMA channels
+ */
+struct zynqmp_disp_layer_info {
+ const struct zynqmp_disp_format *formats;
+ unsigned int num_formats;
+ unsigned int num_channels;
+};
+
+/**
+ * struct zynqmp_disp_layer - Display layer (DRM plane)
+ * @plane: DRM plane
+ * @id: Layer ID
+ * @disp: Back pointer to struct zynqmp_disp
+ * @info: Static layer information
+ * @dmas: DMA channels
+ * @disp_fmt: Current format information
+ * @drm_fmt: Current DRM format information
+ * @mode: Current operation mode
+ */
+struct zynqmp_disp_layer {
+ struct drm_plane plane;
+ enum zynqmp_disp_layer_id id;
+ struct zynqmp_disp *disp;
+ const struct zynqmp_disp_layer_info *info;
+
+ struct zynqmp_disp_layer_dma dmas[ZYNQMP_DISP_MAX_NUM_SUB_PLANES];
+
+ const struct zynqmp_disp_format *disp_fmt;
+ const struct drm_format_info *drm_fmt;
+ enum zynqmp_disp_layer_mode mode;
+};
+
+/**
+ * struct zynqmp_disp_blend - Blender
+ * @base: Registers I/O base address
+ */
+struct zynqmp_disp_blend {
+ void __iomem *base;
+};
+
+/**
+ * struct zynqmp_disp_avbuf - Audio/video buffer manager
+ * @base: Registers I/O base address
+ */
+struct zynqmp_disp_avbuf {
+ void __iomem *base;
+};
+
+/**
+ * struct zynqmp_disp_audio - Audio mixer
+ * @base: Registers I/O base address
+ * @clk: Audio clock
+ * @clk_from_ps: True of the audio clock comes from PS, false from PL
+ */
+struct zynqmp_disp_audio {
+ void __iomem *base;
+ struct clk *clk;
+ bool clk_from_ps;
+};
+
+/**
+ * struct zynqmp_disp - Display controller
+ * @dev: Device structure
+ * @drm: DRM core
+ * @dpsub: Display subsystem
+ * @crtc: DRM CRTC
+ * @blend: Blender (video rendering pipeline)
+ * @avbuf: Audio/video buffer manager
+ * @audio: Audio mixer
+ * @layers: Layers (planes)
+ * @event: Pending vblank event request
+ * @pclk: Pixel clock
+ * @pclk_from_ps: True of the video clock comes from PS, false from PL
+ */
+struct zynqmp_disp {
+ struct device *dev;
+ struct drm_device *drm;
+ struct zynqmp_dpsub *dpsub;
+
+ struct drm_crtc crtc;
+
+ struct zynqmp_disp_blend blend;
+ struct zynqmp_disp_avbuf avbuf;
+ struct zynqmp_disp_audio audio;
+
+ struct zynqmp_disp_layer layers[ZYNQMP_DISP_NUM_LAYERS];
+
+ struct drm_pending_vblank_event *event;
+
+ struct clk *pclk;
+ bool pclk_from_ps;
+};
+
+/* -----------------------------------------------------------------------------
+ * Audio/Video Buffer Manager
+ */
+
+static const u32 scaling_factors_444[] = {
+ ZYNQMP_DISP_AV_BUF_4BIT_SF,
+ ZYNQMP_DISP_AV_BUF_4BIT_SF,
+ ZYNQMP_DISP_AV_BUF_4BIT_SF,
+};
+
+static const u32 scaling_factors_555[] = {
+ ZYNQMP_DISP_AV_BUF_5BIT_SF,
+ ZYNQMP_DISP_AV_BUF_5BIT_SF,
+ ZYNQMP_DISP_AV_BUF_5BIT_SF,
+};
+
+static const u32 scaling_factors_565[] = {
+ ZYNQMP_DISP_AV_BUF_5BIT_SF,
+ ZYNQMP_DISP_AV_BUF_6BIT_SF,
+ ZYNQMP_DISP_AV_BUF_5BIT_SF,
+};
+
+static const u32 scaling_factors_666[] = {
+ ZYNQMP_DISP_AV_BUF_6BIT_SF,
+ ZYNQMP_DISP_AV_BUF_6BIT_SF,
+ ZYNQMP_DISP_AV_BUF_6BIT_SF,
+};
+
+static const u32 scaling_factors_888[] = {
+ ZYNQMP_DISP_AV_BUF_8BIT_SF,
+ ZYNQMP_DISP_AV_BUF_8BIT_SF,
+ ZYNQMP_DISP_AV_BUF_8BIT_SF,
+};
+
+static const u32 scaling_factors_101010[] = {
+ ZYNQMP_DISP_AV_BUF_10BIT_SF,
+ ZYNQMP_DISP_AV_BUF_10BIT_SF,
+ ZYNQMP_DISP_AV_BUF_10BIT_SF,
+};
+
+/* List of video layer formats */
+static const struct zynqmp_disp_format avbuf_vid_fmts[] = {
+ {
+ .drm_fmt = DRM_FORMAT_VYUY,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_UYVY,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YUYV,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YVYU,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YUV422,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YVU422,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YUV444,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YVU444,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_NV16,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_NV61,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_BGR888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_RGB888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_XBGR8888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_XRGB8888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_XBGR2101010,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10,
+ .swap = false,
+ .sf = scaling_factors_101010,
+ }, {
+ .drm_fmt = DRM_FORMAT_XRGB2101010,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10,
+ .swap = true,
+ .sf = scaling_factors_101010,
+ }, {
+ .drm_fmt = DRM_FORMAT_YUV420,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_YVU420,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_NV12,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_NV21,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420,
+ .swap = true,
+ .sf = scaling_factors_888,
+ },
+};
+
+/* List of graphics layer formats */
+static const struct zynqmp_disp_format avbuf_gfx_fmts[] = {
+ {
+ .drm_fmt = DRM_FORMAT_ABGR8888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_ARGB8888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_RGBA8888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_BGRA8888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888,
+ .swap = true,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_BGR888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB888,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_RGB888,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_BGR888,
+ .swap = false,
+ .sf = scaling_factors_888,
+ }, {
+ .drm_fmt = DRM_FORMAT_RGBA5551,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551,
+ .swap = false,
+ .sf = scaling_factors_555,
+ }, {
+ .drm_fmt = DRM_FORMAT_BGRA5551,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551,
+ .swap = true,
+ .sf = scaling_factors_555,
+ }, {
+ .drm_fmt = DRM_FORMAT_RGBA4444,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444,
+ .swap = false,
+ .sf = scaling_factors_444,
+ }, {
+ .drm_fmt = DRM_FORMAT_BGRA4444,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444,
+ .swap = true,
+ .sf = scaling_factors_444,
+ }, {
+ .drm_fmt = DRM_FORMAT_RGB565,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565,
+ .swap = false,
+ .sf = scaling_factors_565,
+ }, {
+ .drm_fmt = DRM_FORMAT_BGR565,
+ .buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565,
+ .swap = true,
+ .sf = scaling_factors_565,
+ },
+};
+
+static u32 zynqmp_disp_avbuf_read(struct zynqmp_disp_avbuf *avbuf, int reg)
+{
+ return readl(avbuf->base + reg);
+}
+
+static void zynqmp_disp_avbuf_write(struct zynqmp_disp_avbuf *avbuf,
+ int reg, u32 val)
+{
+ writel(val, avbuf->base + reg);
+}
+
+/**
+ * zynqmp_disp_avbuf_set_format - Set the input format for a layer
+ * @avbuf: Audio/video buffer manager
+ * @layer: The layer ID
+ * @fmt: The format information
+ *
+ * Set the video buffer manager format for @layer to @fmt.
+ */
+static void zynqmp_disp_avbuf_set_format(struct zynqmp_disp_avbuf *avbuf,
+ enum zynqmp_disp_layer_id layer,
+ const struct zynqmp_disp_format *fmt)
+{
+ unsigned int i;
+ u32 val;
+
+ val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_FMT);
+ val &= layer == ZYNQMP_DISP_LAYER_VID
+ ? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
+ : ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
+ val |= fmt->buf_fmt;
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_FMT, val);
+
+ for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_SF; i++) {
+ unsigned int reg = layer == ZYNQMP_DISP_LAYER_VID
+ ? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
+ : ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
+
+ zynqmp_disp_avbuf_write(avbuf, reg, fmt->sf[i]);
+ }
+}
+
+/**
+ * zynqmp_disp_avbuf_set_clocks_sources - Set the clocks sources
+ * @avbuf: Audio/video buffer manager
+ * @video_from_ps: True if the video clock originates from the PS
+ * @audio_from_ps: True if the audio clock originates from the PS
+ * @timings_internal: True if video timings are generated internally
+ *
+ * Set the source for the video and audio clocks, as well as for the video
+ * timings. Clocks can originate from the PS or PL, and timings can be
+ * generated internally or externally.
+ */
+static void
+zynqmp_disp_avbuf_set_clocks_sources(struct zynqmp_disp_avbuf *avbuf,
+ bool video_from_ps, bool audio_from_ps,
+ bool timings_internal)
+{
+ u32 val = 0;
+
+ if (video_from_ps)
+ val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_FROM_PS;
+ if (audio_from_ps)
+ val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_AUD_FROM_PS;
+ if (timings_internal)
+ val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_INTERNAL_TIMING;
+
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CLK_SRC, val);
+}
+
+/**
+ * zynqmp_disp_avbuf_enable_channels - Enable buffer channels
+ * @avbuf: Audio/video buffer manager
+ *
+ * Enable all (video and audio) buffer channels.
+ */
+static void zynqmp_disp_avbuf_enable_channels(struct zynqmp_disp_avbuf *avbuf)
+{
+ unsigned int i;
+ u32 val;
+
+ val = ZYNQMP_DISP_AV_BUF_CHBUF_EN |
+ (ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_MAX <<
+ ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT);
+
+ for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_VID_GFX_BUFFERS; i++)
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CHBUF(i),
+ val);
+
+ val = ZYNQMP_DISP_AV_BUF_CHBUF_EN |
+ (ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_AUD_MAX <<
+ ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT);
+
+ for (; i < ZYNQMP_DISP_AV_BUF_NUM_BUFFERS; i++)
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CHBUF(i),
+ val);
+}
+
+/**
+ * zynqmp_disp_avbuf_disable_channels - Disable buffer channels
+ * @avbuf: Audio/video buffer manager
+ *
+ * Disable all (video and audio) buffer channels.
+ */
+static void zynqmp_disp_avbuf_disable_channels(struct zynqmp_disp_avbuf *avbuf)
+{
+ unsigned int i;
+
+ for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_BUFFERS; i++)
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_CHBUF(i),
+ ZYNQMP_DISP_AV_BUF_CHBUF_FLUSH);
+}
+
+/**
+ * zynqmp_disp_avbuf_enable_audio - Enable audio
+ * @avbuf: Audio/video buffer manager
+ *
+ * Enable all audio buffers with a non-live (memory) source.
+ */
+static void zynqmp_disp_avbuf_enable_audio(struct zynqmp_disp_avbuf *avbuf)
+{
+ u32 val;
+
+ val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MEM;
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
+}
+
+/**
+ * zynqmp_disp_avbuf_disable_audio - Disable audio
+ * @avbuf: Audio/video buffer manager
+ *
+ * Disable all audio buffers.
+ */
+static void zynqmp_disp_avbuf_disable_audio(struct zynqmp_disp_avbuf *avbuf)
+{
+ u32 val;
+
+ val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_DISABLE;
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
+}
+
+/**
+ * zynqmp_disp_avbuf_enable_video - Enable a video layer
+ * @avbuf: Audio/video buffer manager
+ * @layer: The layer ID
+ * @mode: Operating mode of layer
+ *
+ * Enable the video/graphics buffer for @layer.
+ */
+static void zynqmp_disp_avbuf_enable_video(struct zynqmp_disp_avbuf *avbuf,
+ enum zynqmp_disp_layer_id layer,
+ enum zynqmp_disp_layer_mode mode)
+{
+ u32 val;
+
+ val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
+ if (layer == ZYNQMP_DISP_LAYER_VID) {
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
+ if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MEM;
+ else
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_LIVE;
+ } else {
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
+ if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
+ else
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_LIVE;
+ }
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
+}
+
+/**
+ * zynqmp_disp_avbuf_disable_video - Disable a video layer
+ * @avbuf: Audio/video buffer manager
+ * @layer: The layer ID
+ *
+ * Disable the video/graphics buffer for @layer.
+ */
+static void zynqmp_disp_avbuf_disable_video(struct zynqmp_disp_avbuf *avbuf,
+ enum zynqmp_disp_layer_id layer)
+{
+ u32 val;
+
+ val = zynqmp_disp_avbuf_read(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT);
+ if (layer == ZYNQMP_DISP_LAYER_VID) {
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_NONE;
+ } else {
+ val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
+ val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_DISABLE;
+ }
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
+}
+
+/**
+ * zynqmp_disp_avbuf_enable - Enable the video pipe
+ * @avbuf: Audio/video buffer manager
+ *
+ * De-assert the video pipe reset.
+ */
+static void zynqmp_disp_avbuf_enable(struct zynqmp_disp_avbuf *avbuf)
+{
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_SRST_REG, 0);
+}
+
+/**
+ * zynqmp_disp_avbuf_disable - Disable the video pipe
+ * @avbuf: Audio/video buffer manager
+ *
+ * Assert the video pipe reset.
+ */
+static void zynqmp_disp_avbuf_disable(struct zynqmp_disp_avbuf *avbuf)
+{
+ zynqmp_disp_avbuf_write(avbuf, ZYNQMP_DISP_AV_BUF_SRST_REG,
+ ZYNQMP_DISP_AV_BUF_SRST_REG_VID_RST);
+}
+
+/* -----------------------------------------------------------------------------
+ * Blender (Video Pipeline)
+ */
+
+static void zynqmp_disp_blend_write(struct zynqmp_disp_blend *blend,
+ int reg, u32 val)
+{
+ writel(val, blend->base + reg);
+}
+
+/*
+ * Colorspace conversion matrices.
+ *
+ * Hardcode RGB <-> YUV conversion to full-range SDTV for now.
+ */
+static const u16 csc_zero_matrix[] = {
+ 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0,
+ 0x0, 0x0, 0x0
+};
+
+static const u16 csc_identity_matrix[] = {
+ 0x1000, 0x0, 0x0,
+ 0x0, 0x1000, 0x0,
+ 0x0, 0x0, 0x1000
+};
+
+static const u32 csc_zero_offsets[] = {
+ 0, 0, 0
+};
+
+static const u16 csc_rgb_to_sdtv_matrix[] = {
+ 0x4c9, 0x864, 0x1d3,
+ 0x7d4d, 0x7ab3, 0x800,
+ 0x800, 0x794d, 0x7eb3
+};
+
+static const u32 csc_rgb_to_sdtv_offsets[] = {
+ 0x0, 0x8000000, 0x8000000
+};
+
+static const u16 csc_sdtv_to_rgb_matrix[] = {
+ 0x1000, 0x166f, 0x0,
+ 0x1000, 0x7483, 0x7a7f,
+ 0x1000, 0x0, 0x1c5a
+};
+
+static const u32 csc_sdtv_to_rgb_offsets[] = {
+ 0x0, 0x1800, 0x1800
+};
+
+/**
+ * zynqmp_disp_blend_set_output_format - Set the output format of the blender
+ * @blend: Blender object
+ * @format: Output format
+ *
+ * Set the output format of the blender to @format.
+ */
+static void zynqmp_disp_blend_set_output_format(struct zynqmp_disp_blend *blend,
+ enum zynqmp_dpsub_format format)
+{
+ static const unsigned int blend_output_fmts[] = {
+ [ZYNQMP_DPSUB_FORMAT_RGB] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB,
+ [ZYNQMP_DPSUB_FORMAT_YCRCB444] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR444,
+ [ZYNQMP_DPSUB_FORMAT_YCRCB422] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR422
+ | ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_EN_DOWNSAMPLE,
+ [ZYNQMP_DPSUB_FORMAT_YONLY] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YONLY,
+ };
+
+ u32 fmt = blend_output_fmts[format];
+ const u16 *coeffs;
+ const u32 *offsets;
+ unsigned int i;
+
+ zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT, fmt);
+ if (fmt == ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB) {
+ coeffs = csc_identity_matrix;
+ offsets = csc_zero_offsets;
+ } else {
+ coeffs = csc_rgb_to_sdtv_matrix;
+ offsets = csc_rgb_to_sdtv_offsets;
+ }
+
+ for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_COEFF; i++)
+ zynqmp_disp_blend_write(blend,
+ ZYNQMP_DISP_V_BLEND_RGB2YCBCR_COEFF(i),
+ coeffs[i]);
+
+ for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_OFFSET; i++)
+ zynqmp_disp_blend_write(blend,
+ ZYNQMP_DISP_V_BLEND_OUTCSC_OFFSET(i),
+ offsets[i]);
+}
+
+/**
+ * zynqmp_disp_blend_set_bg_color - Set the background color
+ * @blend: Blender object
+ * @rcr: Red/Cr color component
+ * @gy: Green/Y color component
+ * @bcb: Blue/Cb color component
+ *
+ * Set the background color to (@rcr, @gy, @bcb), corresponding to the R, G and
+ * B or Cr, Y and Cb components respectively depending on the selected output
+ * format.
+ */
+static void zynqmp_disp_blend_set_bg_color(struct zynqmp_disp_blend *blend,
+ u32 rcr, u32 gy, u32 bcb)
+{
+ zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_BG_CLR_0, rcr);
+ zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_BG_CLR_1, gy);
+ zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_BG_CLR_2, bcb);
+}
+
+/**
+ * zynqmp_disp_blend_set_global_alpha - Configure global alpha blending
+ * @blend: Blender object
+ * @enable: True to enable global alpha blending
+ * @alpha: Global alpha value (ignored if @enabled is false)
+ */
+static void zynqmp_disp_blend_set_global_alpha(struct zynqmp_disp_blend *blend,
+ bool enable, u32 alpha)
+{
+ zynqmp_disp_blend_write(blend, ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA,
+ ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_VALUE(alpha) |
+ (enable ? ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_EN : 0));
+}
+
+/**
+ * zynqmp_disp_blend_layer_set_csc - Configure colorspace conversion for layer
+ * @blend: Blender object
+ * @layer: The layer
+ * @coeffs: Colorspace conversion matrix
+ * @offsets: Colorspace conversion offsets
+ *
+ * Configure the input colorspace conversion matrix and offsets for the @layer.
+ * Columns of the matrix are automatically swapped based on the input format to
+ * handle RGB and YCrCb components permutations.
+ */
+static void zynqmp_disp_blend_layer_set_csc(struct zynqmp_disp_blend *blend,
+ struct zynqmp_disp_layer *layer,
+ const u16 *coeffs,
+ const u32 *offsets)
+{
+ unsigned int swap[3] = { 0, 1, 2 };
+ unsigned int reg;
+ unsigned int i;
+
+ if (layer->disp_fmt->swap) {
+ if (layer->drm_fmt->is_yuv) {
+ /* Swap U and V. */
+ swap[1] = 2;
+ swap[2] = 1;
+ } else {
+ /* Swap R and B. */
+ swap[0] = 2;
+ swap[2] = 0;
+ }
+ }
+
+ if (layer->id == ZYNQMP_DISP_LAYER_VID)
+ reg = ZYNQMP_DISP_V_BLEND_IN1CSC_COEFF(0);
+ else
+ reg = ZYNQMP_DISP_V_BLEND_IN2CSC_COEFF(0);
+
+ for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_COEFF; i += 3, reg += 12) {
+ zynqmp_disp_blend_write(blend, reg + 0, coeffs[i + swap[0]]);
+ zynqmp_disp_blend_write(blend, reg + 4, coeffs[i + swap[1]]);
+ zynqmp_disp_blend_write(blend, reg + 8, coeffs[i + swap[2]]);
+ }
+
+ if (layer->id == ZYNQMP_DISP_LAYER_VID)
+ reg = ZYNQMP_DISP_V_BLEND_IN1CSC_OFFSET(0);
+ else
+ reg = ZYNQMP_DISP_V_BLEND_IN2CSC_OFFSET(0);
+
+ for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_OFFSET; i++)
+ zynqmp_disp_blend_write(blend, reg + i * 4, offsets[i]);
+}
+
+/**
+ * zynqmp_disp_blend_layer_enable - Enable a layer
+ * @blend: Blender object
+ * @layer: The layer
+ */
+static void zynqmp_disp_blend_layer_enable(struct zynqmp_disp_blend *blend,
+ struct zynqmp_disp_layer *layer)
+{
+ const u16 *coeffs;
+ const u32 *offsets;
+ u32 val;
+
+ val = (layer->drm_fmt->is_yuv ?
+ 0 : ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_RGB) |
+ (layer->drm_fmt->hsub > 1 ?
+ ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_EN_US : 0);
+
+ zynqmp_disp_blend_write(blend,
+ ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
+ val);
+
+ if (layer->drm_fmt->is_yuv) {
+ coeffs = csc_sdtv_to_rgb_matrix;
+ offsets = csc_sdtv_to_rgb_offsets;
+ } else {
+ coeffs = csc_identity_matrix;
+ offsets = csc_zero_offsets;
+ }
+
+ zynqmp_disp_blend_layer_set_csc(blend, layer, coeffs, offsets);
+}
+
+/**
+ * zynqmp_disp_blend_layer_disable - Disable a layer
+ * @blend: Blender object
+ * @layer: The layer
+ */
+static void zynqmp_disp_blend_layer_disable(struct zynqmp_disp_blend *blend,
+ struct zynqmp_disp_layer *layer)
+{
+ zynqmp_disp_blend_write(blend,
+ ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
+ 0);
+
+ zynqmp_disp_blend_layer_set_csc(blend, layer, csc_zero_matrix,
+ csc_zero_offsets);
+}
+
+/* -----------------------------------------------------------------------------
+ * Audio Mixer
+ */
+
+static void zynqmp_disp_audio_write(struct zynqmp_disp_audio *audio,
+ int reg, u32 val)
+{
+ writel(val, audio->base + reg);
+}
+
+/**
+ * zynqmp_disp_audio_enable - Enable the audio mixer
+ * @audio: Audio mixer
+ *
+ * Enable the audio mixer by de-asserting the soft reset. The audio state is set to
+ * default values by the reset, set the default mixer volume explicitly.
+ */
+static void zynqmp_disp_audio_enable(struct zynqmp_disp_audio *audio)
+{
+ /* Clear the audio soft reset register as it's an non-reset flop. */
+ zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_SOFT_RESET, 0);
+ zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_MIXER_VOLUME,
+ ZYNQMP_DISP_AUD_MIXER_VOLUME_NO_SCALE);
+}
+
+/**
+ * zynqmp_disp_audio_disable - Disable the audio mixer
+ * @audio: Audio mixer
+ *
+ * Disable the audio mixer by asserting its soft reset.
+ */
+static void zynqmp_disp_audio_disable(struct zynqmp_disp_audio *audio)
+{
+ zynqmp_disp_audio_write(audio, ZYNQMP_DISP_AUD_SOFT_RESET,
+ ZYNQMP_DISP_AUD_SOFT_RESET_AUD_SRST);
+}
+
+static void zynqmp_disp_audio_init(struct device *dev,
+ struct zynqmp_disp_audio *audio)
+{
+ /* Try the live PL audio clock. */
+ audio->clk = devm_clk_get(dev, "dp_live_audio_aclk");
+ if (!IS_ERR(audio->clk)) {
+ audio->clk_from_ps = false;
+ return;
+ }
+
+ /* If the live PL audio clock is not valid, fall back to PS clock. */
+ audio->clk = devm_clk_get(dev, "dp_aud_clk");
+ if (!IS_ERR(audio->clk)) {
+ audio->clk_from_ps = true;
+ return;
+ }
+
+ dev_err(dev, "audio disabled due to missing clock\n");
+}
+
+/* -----------------------------------------------------------------------------
+ * ZynqMP Display external functions for zynqmp_dp
+ */
+
+/**
+ * zynqmp_disp_handle_vblank - Handle the vblank event
+ * @disp: Display controller
+ *
+ * This function handles the vblank interrupt, and sends an event to
+ * CRTC object. This will be called by the DP vblank interrupt handler.
+ */
+void zynqmp_disp_handle_vblank(struct zynqmp_disp *disp)
+{
+ struct drm_crtc *crtc = &disp->crtc;
+
+ drm_crtc_handle_vblank(crtc);
+}
+
+/**
+ * zynqmp_disp_audio_enabled - If the audio is enabled
+ * @disp: Display controller
+ *
+ * Return if the audio is enabled depending on the audio clock.
+ *
+ * Return: true if audio is enabled, or false.
+ */
+bool zynqmp_disp_audio_enabled(struct zynqmp_disp *disp)
+{
+ return !!disp->audio.clk;
+}
+
+/**
+ * zynqmp_disp_get_audio_clk_rate - Get the current audio clock rate
+ * @disp: Display controller
+ *
+ * Return: the current audio clock rate.
+ */
+unsigned int zynqmp_disp_get_audio_clk_rate(struct zynqmp_disp *disp)
+{
+ if (zynqmp_disp_audio_enabled(disp))
+ return 0;
+ return clk_get_rate(disp->audio.clk);
+}
+
+/**
+ * zynqmp_disp_get_crtc_mask - Return the CRTC bit mask
+ * @disp: Display controller
+ *
+ * Return: the crtc mask of the zyqnmp_disp CRTC.
+ */
+uint32_t zynqmp_disp_get_crtc_mask(struct zynqmp_disp *disp)
+{
+ return drm_crtc_mask(&disp->crtc);
+}
+
+/* -----------------------------------------------------------------------------
+ * ZynqMP Display Layer & DRM Plane
+ */
+
+/**
+ * zynqmp_disp_layer_find_format - Find format information for a DRM format
+ * @layer: The layer
+ * @drm_fmt: DRM format to search
+ *
+ * Search display subsystem format information corresponding to the given DRM
+ * format @drm_fmt for the @layer, and return a pointer to the format
+ * descriptor.
+ *
+ * Return: A pointer to the format descriptor if found, NULL otherwise
+ */
+static const struct zynqmp_disp_format *
+zynqmp_disp_layer_find_format(struct zynqmp_disp_layer *layer,
+ u32 drm_fmt)
+{
+ unsigned int i;
+
+ for (i = 0; i < layer->info->num_formats; i++) {
+ if (layer->info->formats[i].drm_fmt == drm_fmt)
+ return &layer->info->formats[i];
+ }
+
+ return NULL;
+}
+
+/**
+ * zynqmp_disp_layer_enable - Enable a layer
+ * @layer: The layer
+ *
+ * Enable the @layer in the audio/video buffer manager and the blender. DMA
+ * channels are started separately by zynqmp_disp_layer_update().
+ */
+static void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer)
+{
+ zynqmp_disp_avbuf_enable_video(&layer->disp->avbuf, layer->id,
+ ZYNQMP_DISP_LAYER_NONLIVE);
+ zynqmp_disp_blend_layer_enable(&layer->disp->blend, layer);
+
+ layer->mode = ZYNQMP_DISP_LAYER_NONLIVE;
+}
+
+/**
+ * zynqmp_disp_layer_disable - Disable the layer
+ * @layer: The layer
+ *
+ * Disable the layer by stopping its DMA channels and disabling it in the
+ * audio/video buffer manager and the blender.
+ */
+static void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer)
+{
+ unsigned int i;
+
+ for (i = 0; i < layer->drm_fmt->num_planes; i++)
+ dmaengine_terminate_sync(layer->dmas[i].chan);
+
+ zynqmp_disp_avbuf_disable_video(&layer->disp->avbuf, layer->id);
+ zynqmp_disp_blend_layer_disable(&layer->disp->blend, layer);
+}
+
+/**
+ * zynqmp_disp_layer_set_format - Set the layer format
+ * @layer: The layer
+ * @state: The plane state
+ *
+ * Set the format for @layer based on @state->fb->format. The layer must be
+ * disabled.
+ */
+static void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
+ struct drm_plane_state *state)
+{
+ const struct drm_format_info *info = state->fb->format;
+ unsigned int i;
+
+ layer->disp_fmt = zynqmp_disp_layer_find_format(layer, info->format);
+ layer->drm_fmt = info;
+
+ zynqmp_disp_avbuf_set_format(&layer->disp->avbuf, layer->id,
+ layer->disp_fmt);
+
+ /*
+ * Set slave_id for each DMA channel to indicate they're part of a
+ * video group.
+ */
+ for (i = 0; i < info->num_planes; i++) {
+ struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
+ struct dma_slave_config config = {
+ .direction = DMA_MEM_TO_DEV,
+ .slave_id = 1,
+ };
+
+ dmaengine_slave_config(dma->chan, &config);
+ }
+}
+
+/**
+ * zynqmp_disp_layer_update - Update the layer framebuffer
+ * @layer: The layer
+ * @state: The plane state
+ *
+ * Update the framebuffer for the layer by issuing a new DMA engine transaction
+ * for the new framebuffer.
+ *
+ * Return: 0 on success, or the DMA descriptor failure error otherwise
+ */
+static int zynqmp_disp_layer_update(struct zynqmp_disp_layer *layer,
+ struct drm_plane_state *state)
+{
+ const struct drm_format_info *info = layer->drm_fmt;
+ unsigned int i;
+
+ for (i = 0; i < layer->drm_fmt->num_planes; i++) {
+ unsigned int width = state->crtc_w / (i ? info->hsub : 1);
+ unsigned int height = state->crtc_h / (i ? info->vsub : 1);
+ struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
+ struct dma_async_tx_descriptor *desc;
+ dma_addr_t paddr;
+
+ paddr = drm_fb_cma_get_gem_addr(state->fb, state, i);
+
+ dma->xt.numf = height;
+ dma->sgl.size = width * info->cpp[i];
+ dma->sgl.icg = state->fb->pitches[i] - dma->sgl.size;
+ dma->xt.src_start = paddr;
+ dma->xt.frame_size = 1;
+ dma->xt.dir = DMA_MEM_TO_DEV;
+ dma->xt.src_sgl = true;
+ dma->xt.dst_sgl = false;
+
+ desc = dmaengine_prep_interleaved_dma(dma->chan, &dma->xt,
+ DMA_CTRL_ACK |
+ DMA_PREP_REPEAT |
+ DMA_PREP_LOAD_EOT);
+ if (!desc) {
+ dev_err(layer->disp->dev,
+ "failed to prepare DMA descriptor\n");
+ return -ENOMEM;
+ }
+
+ dmaengine_submit(desc);
+ dma_async_issue_pending(dma->chan);
+ }
+
+ return 0;
+}
+
+static inline struct zynqmp_disp_layer *plane_to_layer(struct drm_plane *plane)
+{
+ return container_of(plane, struct zynqmp_disp_layer, plane);
+}
+
+static int
+zynqmp_disp_plane_atomic_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct drm_crtc_state *crtc_state;
+
+ if (!state->crtc)
+ return 0;
+
+ crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ return drm_atomic_helper_check_plane_state(state, crtc_state,
+ DRM_PLANE_HELPER_NO_SCALING,
+ DRM_PLANE_HELPER_NO_SCALING,
+ false, false);
+}
+
+static void
+zynqmp_disp_plane_atomic_disable(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct zynqmp_disp_layer *layer = plane_to_layer(plane);
+
+ if (!old_state->fb)
+ return;
+
+ zynqmp_disp_layer_disable(layer);
+}
+
+static void
+zynqmp_disp_plane_atomic_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct zynqmp_disp_layer *layer = plane_to_layer(plane);
+ bool format_changed = false;
+
+ if (!old_state->fb ||
+ old_state->fb->format->format != plane->state->fb->format->format)
+ format_changed = true;
+
+ /*
+ * If the format has changed (including going from a previously
+ * disabled state to any format), reconfigure the format. Disable the
+ * plane first if needed.
+ */
+ if (format_changed) {
+ if (old_state->fb)
+ zynqmp_disp_layer_disable(layer);
+
+ zynqmp_disp_layer_set_format(layer, plane->state);
+ }
+
+ zynqmp_disp_layer_update(layer, plane->state);
+
+ /* Enable or re-enable the plane is the format has changed. */
+ if (format_changed)
+ zynqmp_disp_layer_enable(layer);
+}
+
+static const struct drm_plane_helper_funcs zynqmp_disp_plane_helper_funcs = {
+ .atomic_check = zynqmp_disp_plane_atomic_check,
+ .atomic_update = zynqmp_disp_plane_atomic_update,
+ .atomic_disable = zynqmp_disp_plane_atomic_disable,
+};
+
+static const struct drm_plane_funcs zynqmp_disp_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = drm_plane_cleanup,
+ .reset = drm_atomic_helper_plane_reset,
+ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
+{
+ unsigned int i, j;
+ int ret;
+
+ for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++) {
+ struct zynqmp_disp_layer *layer = &disp->layers[i];
+ enum drm_plane_type type;
+ u32 *drm_formats;
+
+ drm_formats = drmm_kcalloc(disp->drm, sizeof(*drm_formats),
+ layer->info->num_formats,
+ GFP_KERNEL);
+ if (!drm_formats)
+ return -ENOMEM;
+
+ for (j = 0; j < layer->info->num_formats; ++j)
+ drm_formats[j] = layer->info->formats[j].drm_fmt;
+
+ /* Graphics layer is primary, and video layer is overlay. */
+ type = i == ZYNQMP_DISP_LAYER_GFX
+ ? DRM_PLANE_TYPE_PRIMARY : DRM_PLANE_TYPE_OVERLAY;
+ ret = drm_universal_plane_init(disp->drm, &layer->plane, 0,
+ &zynqmp_disp_plane_funcs,
+ drm_formats,
+ layer->info->num_formats,
+ NULL, type, NULL);
+ if (ret)
+ return ret;
+
+ drm_plane_helper_add(&layer->plane,
+ &zynqmp_disp_plane_helper_funcs);
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_disp_layer_release_dma - Release DMA channels for a layer
+ * @disp: Display controller
+ * @layer: The layer
+ *
+ * Release the DMA channels associated with @layer.
+ */
+static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
+ struct zynqmp_disp_layer *layer)
+{
+ unsigned int i;
+
+ if (!layer->info)
+ return;
+
+ for (i = 0; i < layer->info->num_channels; i++) {
+ struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
+
+ if (!dma->chan)
+ continue;
+
+ /* Make sure the channel is terminated before release. */
+ dmaengine_terminate_sync(dma->chan);
+ dma_release_channel(dma->chan);
+ }
+}
+
+/**
+ * zynqmp_disp_destroy_layers - Destroy all layers
+ * @disp: Display controller
+ */
+static void zynqmp_disp_destroy_layers(struct zynqmp_disp *disp)
+{
+ unsigned int i;
+
+ for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++)
+ zynqmp_disp_layer_release_dma(disp, &disp->layers[i]);
+}
+
+/**
+ * zynqmp_disp_layer_request_dma - Request DMA channels for a layer
+ * @disp: Display controller
+ * @layer: The layer
+ *
+ * Request all DMA engine channels needed by @layer.
+ *
+ * Return: 0 on success, or the DMA channel request error otherwise
+ */
+static int zynqmp_disp_layer_request_dma(struct zynqmp_disp *disp,
+ struct zynqmp_disp_layer *layer)
+{
+ static const char * const dma_names[] = { "vid", "gfx" };
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < layer->info->num_channels; i++) {
+ struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
+ char dma_channel_name[16];
+
+ snprintf(dma_channel_name, sizeof(dma_channel_name),
+ "%s%u", dma_names[layer->id], i);
+ dma->chan = of_dma_request_slave_channel(disp->dev->of_node,
+ dma_channel_name);
+ if (IS_ERR(dma->chan)) {
+ dev_err(disp->dev, "failed to request dma channel\n");
+ ret = PTR_ERR(dma->chan);
+ dma->chan = NULL;
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_disp_create_layers - Create and initialize all layers
+ * @disp: Display controller
+ *
+ * Return: 0 on success, or the DMA channel request error otherwise
+ */
+static int zynqmp_disp_create_layers(struct zynqmp_disp *disp)
+{
+ static const struct zynqmp_disp_layer_info layer_info[] = {
+ [ZYNQMP_DISP_LAYER_VID] = {
+ .formats = avbuf_vid_fmts,
+ .num_formats = ARRAY_SIZE(avbuf_vid_fmts),
+ .num_channels = 3,
+ },
+ [ZYNQMP_DISP_LAYER_GFX] = {
+ .formats = avbuf_gfx_fmts,
+ .num_formats = ARRAY_SIZE(avbuf_gfx_fmts),
+ .num_channels = 1,
+ },
+ };
+
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++) {
+ struct zynqmp_disp_layer *layer = &disp->layers[i];
+
+ layer->id = i;
+ layer->disp = disp;
+ layer->info = &layer_info[i];
+
+ ret = zynqmp_disp_layer_request_dma(disp, layer);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+
+err:
+ zynqmp_disp_destroy_layers(disp);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * ZynqMP Display & DRM CRTC
+ */
+
+/**
+ * zynqmp_disp_enable - Enable the display controller
+ * @disp: Display controller
+ */
+static void zynqmp_disp_enable(struct zynqmp_disp *disp)
+{
+ zynqmp_disp_avbuf_enable(&disp->avbuf);
+ /* Choose clock source based on the DT clock handle. */
+ zynqmp_disp_avbuf_set_clocks_sources(&disp->avbuf, disp->pclk_from_ps,
+ disp->audio.clk_from_ps, true);
+ zynqmp_disp_avbuf_enable_channels(&disp->avbuf);
+ zynqmp_disp_avbuf_enable_audio(&disp->avbuf);
+
+ zynqmp_disp_audio_enable(&disp->audio);
+}
+
+/**
+ * zynqmp_disp_disable - Disable the display controller
+ * @disp: Display controller
+ */
+static void zynqmp_disp_disable(struct zynqmp_disp *disp)
+{
+ struct drm_crtc *crtc = &disp->crtc;
+
+ zynqmp_disp_audio_disable(&disp->audio);
+
+ zynqmp_disp_avbuf_disable_audio(&disp->avbuf);
+ zynqmp_disp_avbuf_disable_channels(&disp->avbuf);
+ zynqmp_disp_avbuf_disable(&disp->avbuf);
+
+ /* Mark the flip is done as crtc is disabled anyway */
+ if (crtc->state->event) {
+ complete_all(crtc->state->event->base.completion);
+ crtc->state->event = NULL;
+ }
+}
+
+static inline struct zynqmp_disp *crtc_to_disp(struct drm_crtc *crtc)
+{
+ return container_of(crtc, struct zynqmp_disp, crtc);
+}
+
+static int zynqmp_disp_crtc_setup_clock(struct drm_crtc *crtc,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct zynqmp_disp *disp = crtc_to_disp(crtc);
+ unsigned long mode_clock = adjusted_mode->clock * 1000;
+ unsigned long rate;
+ long diff;
+ int ret;
+
+ ret = clk_set_rate(disp->pclk, mode_clock);
+ if (ret) {
+ dev_err(disp->dev, "failed to set a pixel clock\n");
+ return ret;
+ }
+
+ rate = clk_get_rate(disp->pclk);
+ diff = rate - mode_clock;
+ if (abs(diff) > mode_clock / 20)
+ dev_info(disp->dev,
+ "requested pixel rate: %lu actual rate: %lu\n",
+ mode_clock, rate);
+ else
+ dev_dbg(disp->dev,
+ "requested pixel rate: %lu actual rate: %lu\n",
+ mode_clock, rate);
+
+ return 0;
+}
+
+static void
+zynqmp_disp_crtc_atomic_enable(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct zynqmp_disp *disp = crtc_to_disp(crtc);
+ struct drm_display_mode *adjusted_mode = &crtc->state->adjusted_mode;
+ int ret, vrefresh;
+
+ zynqmp_disp_crtc_setup_clock(crtc, adjusted_mode);
+
+ pm_runtime_get_sync(disp->dev);
+ ret = clk_prepare_enable(disp->pclk);
+ if (ret) {
+ dev_err(disp->dev, "failed to enable a pixel clock\n");
+ pm_runtime_put_sync(disp->dev);
+ return;
+ }
+
+ zynqmp_disp_blend_set_output_format(&disp->blend,
+ ZYNQMP_DPSUB_FORMAT_RGB);
+ zynqmp_disp_blend_set_bg_color(&disp->blend, 0, 0, 0);
+ zynqmp_disp_blend_set_global_alpha(&disp->blend, false, 0);
+
+ zynqmp_disp_enable(disp);
+
+ /* Delay of 3 vblank intervals for timing gen to be stable */
+ vrefresh = (adjusted_mode->clock * 1000) /
+ (adjusted_mode->vtotal * adjusted_mode->htotal);
+ msleep(3 * 1000 / vrefresh);
+}
+
+static void
+zynqmp_disp_crtc_atomic_disable(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct zynqmp_disp *disp = crtc_to_disp(crtc);
+ struct drm_plane_state *old_plane_state;
+
+ /*
+ * Disable the plane if active. The old plane state can be NULL in the
+ * .shutdown() path if the plane is already disabled, skip
+ * zynqmp_disp_plane_atomic_disable() in that case.
+ */
+ old_plane_state = drm_atomic_get_old_plane_state(old_crtc_state->state,
+ crtc->primary);
+ if (old_plane_state)
+ zynqmp_disp_plane_atomic_disable(crtc->primary, old_plane_state);
+
+ zynqmp_disp_disable(disp);
+
+ drm_crtc_vblank_off(&disp->crtc);
+
+ clk_disable_unprepare(disp->pclk);
+ pm_runtime_put_sync(disp->dev);
+}
+
+static int zynqmp_disp_crtc_atomic_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ return drm_atomic_add_affected_planes(state->state, crtc);
+}
+
+static void
+zynqmp_disp_crtc_atomic_begin(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ drm_crtc_vblank_on(crtc);
+}
+
+static void
+zynqmp_disp_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ if (crtc->state->event) {
+ struct drm_pending_vblank_event *event;
+
+ /* Consume the flip_done event from atomic helper. */
+ event = crtc->state->event;
+ crtc->state->event = NULL;
+
+ event->pipe = drm_crtc_index(crtc);
+
+ WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_arm_vblank_event(crtc, event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ }
+}
+
+static const struct drm_crtc_helper_funcs zynqmp_disp_crtc_helper_funcs = {
+ .atomic_enable = zynqmp_disp_crtc_atomic_enable,
+ .atomic_disable = zynqmp_disp_crtc_atomic_disable,
+ .atomic_check = zynqmp_disp_crtc_atomic_check,
+ .atomic_begin = zynqmp_disp_crtc_atomic_begin,
+ .atomic_flush = zynqmp_disp_crtc_atomic_flush,
+};
+
+static int zynqmp_disp_crtc_enable_vblank(struct drm_crtc *crtc)
+{
+ struct zynqmp_disp *disp = crtc_to_disp(crtc);
+
+ zynqmp_dp_enable_vblank(disp->dpsub->dp);
+
+ return 0;
+}
+
+static void zynqmp_disp_crtc_disable_vblank(struct drm_crtc *crtc)
+{
+ struct zynqmp_disp *disp = crtc_to_disp(crtc);
+
+ zynqmp_dp_disable_vblank(disp->dpsub->dp);
+}
+
+static const struct drm_crtc_funcs zynqmp_disp_crtc_funcs = {
+ .destroy = drm_crtc_cleanup,
+ .set_config = drm_atomic_helper_set_config,
+ .page_flip = drm_atomic_helper_page_flip,
+ .reset = drm_atomic_helper_crtc_reset,
+ .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+ .enable_vblank = zynqmp_disp_crtc_enable_vblank,
+ .disable_vblank = zynqmp_disp_crtc_disable_vblank,
+};
+
+static int zynqmp_disp_create_crtc(struct zynqmp_disp *disp)
+{
+ struct drm_plane *plane = &disp->layers[ZYNQMP_DISP_LAYER_GFX].plane;
+ int ret;
+
+ ret = drm_crtc_init_with_planes(disp->drm, &disp->crtc, plane,
+ NULL, &zynqmp_disp_crtc_funcs, NULL);
+ if (ret < 0)
+ return ret;
+
+ drm_crtc_helper_add(&disp->crtc, &zynqmp_disp_crtc_helper_funcs);
+
+ /* Start with vertical blanking interrupt reporting disabled. */
+ drm_crtc_vblank_off(&disp->crtc);
+
+ return 0;
+}
+
+static void zynqmp_disp_map_crtc_to_plane(struct zynqmp_disp *disp)
+{
+ u32 possible_crtcs = drm_crtc_mask(&disp->crtc);
+ unsigned int i;
+
+ for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++)
+ disp->layers[i].plane.possible_crtcs = possible_crtcs;
+}
+
+/* -----------------------------------------------------------------------------
+ * Initialization & Cleanup
+ */
+
+int zynqmp_disp_drm_init(struct zynqmp_dpsub *dpsub)
+{
+ struct zynqmp_disp *disp = dpsub->disp;
+ int ret;
+
+ ret = zynqmp_disp_create_planes(disp);
+ if (ret)
+ return ret;
+
+ ret = zynqmp_disp_create_crtc(disp);
+ if (ret < 0)
+ return ret;
+
+ zynqmp_disp_map_crtc_to_plane(disp);
+
+ return 0;
+}
+
+int zynqmp_disp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm)
+{
+ struct platform_device *pdev = to_platform_device(dpsub->dev);
+ struct zynqmp_disp *disp;
+ struct zynqmp_disp_layer *layer;
+ struct resource *res;
+ int ret;
+
+ disp = drmm_kzalloc(drm, sizeof(*disp), GFP_KERNEL);
+ if (!disp)
+ return -ENOMEM;
+
+ disp->dev = &pdev->dev;
+ disp->dpsub = dpsub;
+ disp->drm = drm;
+
+ dpsub->disp = disp;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "blend");
+ disp->blend.base = devm_ioremap_resource(disp->dev, res);
+ if (IS_ERR(disp->blend.base))
+ return PTR_ERR(disp->blend.base);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "av_buf");
+ disp->avbuf.base = devm_ioremap_resource(disp->dev, res);
+ if (IS_ERR(disp->avbuf.base))
+ return PTR_ERR(disp->avbuf.base);
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aud");
+ disp->audio.base = devm_ioremap_resource(disp->dev, res);
+ if (IS_ERR(disp->audio.base))
+ return PTR_ERR(disp->audio.base);
+
+ /* Try the live PL video clock */
+ disp->pclk = devm_clk_get(disp->dev, "dp_live_video_in_clk");
+ if (!IS_ERR(disp->pclk))
+ disp->pclk_from_ps = false;
+ else if (PTR_ERR(disp->pclk) == -EPROBE_DEFER)
+ return PTR_ERR(disp->pclk);
+
+ /* If the live PL video clock is not valid, fall back to PS clock */
+ if (IS_ERR_OR_NULL(disp->pclk)) {
+ disp->pclk = devm_clk_get(disp->dev, "dp_vtc_pixel_clk_in");
+ if (IS_ERR(disp->pclk)) {
+ dev_err(disp->dev, "failed to init any video clock\n");
+ return PTR_ERR(disp->pclk);
+ }
+ disp->pclk_from_ps = true;
+ }
+
+ zynqmp_disp_audio_init(disp->dev, &disp->audio);
+
+ ret = zynqmp_disp_create_layers(disp);
+ if (ret)
+ return ret;
+
+ layer = &disp->layers[ZYNQMP_DISP_LAYER_VID];
+ dpsub->dma_align = 1 << layer->dmas[0].chan->device->copy_align;
+
+ return 0;
+}
+
+void zynqmp_disp_remove(struct zynqmp_dpsub *dpsub)
+{
+ struct zynqmp_disp *disp = dpsub->disp;
+
+ zynqmp_disp_destroy_layers(disp);
+}
diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp.h b/drivers/gpu/drm/xlnx/zynqmp_disp.h
new file mode 100644
index 0000000000000000000000000000000000000000..f402901afb23030c2a226871d6aeddf3148db69d
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ZynqMP Display Driver
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#ifndef _ZYNQMP_DISP_H_
+#define _ZYNQMP_DISP_H_
+
+#include <linux/types.h>
+
+/*
+ * 3840x2160 is advertised as the maximum resolution, but almost any
+ * resolutions under a 300Mhz pixel rate would work. Pick 4096x4096.
+ */
+#define ZYNQMP_DISP_MAX_WIDTH 4096
+#define ZYNQMP_DISP_MAX_HEIGHT 4096
+
+/* The DPDMA is limited to 44 bit addressing. */
+#define ZYNQMP_DISP_MAX_DMA_BIT 44
+
+struct device;
+struct drm_device;
+struct platform_device;
+struct zynqmp_disp;
+struct zynqmp_dpsub;
+
+void zynqmp_disp_handle_vblank(struct zynqmp_disp *disp);
+bool zynqmp_disp_audio_enabled(struct zynqmp_disp *disp);
+unsigned int zynqmp_disp_get_audio_clk_rate(struct zynqmp_disp *disp);
+uint32_t zynqmp_disp_get_crtc_mask(struct zynqmp_disp *disp);
+
+int zynqmp_disp_drm_init(struct zynqmp_dpsub *dpsub);
+int zynqmp_disp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm);
+void zynqmp_disp_remove(struct zynqmp_dpsub *dpsub);
+
+#endif /* _ZYNQMP_DISP_H_ */
diff --git a/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h b/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h
new file mode 100644
index 0000000000000000000000000000000000000000..f92a006d5070cfa277e4903cc598d1ff58cbfac5
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_disp_regs.h
@@ -0,0 +1,201 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ZynqMP Display Controller Driver - Register Definitions
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#ifndef _ZYNQMP_DISP_REGS_H_
+#define _ZYNQMP_DISP_REGS_H_
+
+#include <linux/bits.h>
+
+/* Blender registers */
+#define ZYNQMP_DISP_V_BLEND_BG_CLR_0 0x0
+#define ZYNQMP_DISP_V_BLEND_BG_CLR_1 0x4
+#define ZYNQMP_DISP_V_BLEND_BG_CLR_2 0x8
+#define ZYNQMP_DISP_V_BLEND_BG_MAX 0xfff
+#define ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA 0xc
+#define ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_VALUE(n) ((n) << 1)
+#define ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_EN BIT(0)
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT 0x14
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB 0x0
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR444 0x1
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR422 0x2
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YONLY 0x3
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_XVYCC 0x4
+#define ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_EN_DOWNSAMPLE BIT(4)
+#define ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(n) (0x18 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_EN_US BIT(0)
+#define ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_RGB BIT(1)
+#define ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_BYPASS BIT(8)
+#define ZYNQMP_DISP_V_BLEND_NUM_COEFF 9
+#define ZYNQMP_DISP_V_BLEND_NUM_OFFSET 3
+#define ZYNQMP_DISP_V_BLEND_RGB2YCBCR_COEFF(n) (0x20 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_IN1CSC_COEFF(n) (0x44 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_IN1CSC_OFFSET(n) (0x68 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_OUTCSC_OFFSET(n) (0x74 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_IN2CSC_COEFF(n) (0x80 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_IN2CSC_OFFSET(n) (0xa4 + ((n) * 4))
+#define ZYNQMP_DISP_V_BLEND_CHROMA_KEY_ENABLE 0x1d0
+#define ZYNQMP_DISP_V_BLEND_CHROMA_KEY_COMP1 0x1d4
+#define ZYNQMP_DISP_V_BLEND_CHROMA_KEY_COMP2 0x1d8
+#define ZYNQMP_DISP_V_BLEND_CHROMA_KEY_COMP3 0x1dc
+
+/* AV buffer manager registers */
+#define ZYNQMP_DISP_AV_BUF_FMT 0x0
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_SHIFT 0
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK (0x1f << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_UYVY (0 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY (1 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YVYU (2 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV (3 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16 (4 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24 (5 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI (6 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MONO (7 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI2 (8 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUV444 (9 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888 (10 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880 (11 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10 (12 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUV444_10 (13 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI2_10 (14 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_10 (15 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_10 (16 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24_10 (17 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YONLY_10 (18 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420 (19 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420 (20 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI2_420 (21 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420_10 (22 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420_10 (23 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI2_420_10 (24 << 0)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_SHIFT 8
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK (0xf << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888 (0 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888 (1 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB888 (2 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_BGR888 (3 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551 (4 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444 (5 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565 (6 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_8BPP (7 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_4BPP (8 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_2BPP (9 << 8)
+#define ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_1BPP (10 << 8)
+#define ZYNQMP_DISP_AV_BUF_NON_LIVE_LATENCY 0x8
+#define ZYNQMP_DISP_AV_BUF_CHBUF(n) (0x10 + ((n) * 4))
+#define ZYNQMP_DISP_AV_BUF_CHBUF_EN BIT(0)
+#define ZYNQMP_DISP_AV_BUF_CHBUF_FLUSH BIT(1)
+#define ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT 2
+#define ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_MASK (0xf << 2)
+#define ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_MAX 0xf
+#define ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_AUD_MAX 0x3
+#define ZYNQMP_DISP_AV_BUF_STATUS 0x28
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL 0x2c
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL_EN BIT(0)
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL_EVENT_SHIFT 1
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL_EVENT_EX_VSYNC 0
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL_EVENT_EX_VID 1
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL_EVENT_EX_AUD 2
+#define ZYNQMP_DISP_AV_BUF_STC_CTRL_EVENT_INT_VSYNC 3
+#define ZYNQMP_DISP_AV_BUF_STC_INIT_VALUE0 0x30
+#define ZYNQMP_DISP_AV_BUF_STC_INIT_VALUE1 0x34
+#define ZYNQMP_DISP_AV_BUF_STC_ADJ 0x38
+#define ZYNQMP_DISP_AV_BUF_STC_VID_VSYNC_TS0 0x3c
+#define ZYNQMP_DISP_AV_BUF_STC_VID_VSYNC_TS1 0x40
+#define ZYNQMP_DISP_AV_BUF_STC_EXT_VSYNC_TS0 0x44
+#define ZYNQMP_DISP_AV_BUF_STC_EXT_VSYNC_TS1 0x48
+#define ZYNQMP_DISP_AV_BUF_STC_CUSTOM_EVENT_TS0 0x4c
+#define ZYNQMP_DISP_AV_BUF_STC_CUSTOM_EVENT_TS1 0x50
+#define ZYNQMP_DISP_AV_BUF_STC_CUSTOM_EVENT2_TS0 0x54
+#define ZYNQMP_DISP_AV_BUF_STC_CUSTOM_EVENT2_TS1 0x58
+#define ZYNQMP_DISP_AV_BUF_STC_SNAPSHOT0 0x60
+#define ZYNQMP_DISP_AV_BUF_STC_SNAPSHOT1 0x64
+#define ZYNQMP_DISP_AV_BUF_OUTPUT 0x70
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_SHIFT 0
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK (0x3 << 0)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_LIVE (0 << 0)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MEM (1 << 0)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_PATTERN (2 << 0)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_NONE (3 << 0)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_SHIFT 2
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK (0x3 << 2)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_DISABLE (0 << 2)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM (1 << 2)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_LIVE (2 << 2)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_NONE (3 << 2)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_SHIFT 4
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK (0x3 << 4)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_PL (0 << 4)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MEM (1 << 4)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_PATTERN (2 << 4)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_DISABLE (3 << 4)
+#define ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN BIT(6)
+#define ZYNQMP_DISP_AV_BUF_HCOUNT_VCOUNT_INT0 0x74
+#define ZYNQMP_DISP_AV_BUF_HCOUNT_VCOUNT_INT1 0x78
+#define ZYNQMP_DISP_AV_BUF_PATTERN_GEN_SELECT 0x100
+#define ZYNQMP_DISP_AV_BUF_CLK_SRC 0x120
+#define ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_FROM_PS BIT(0)
+#define ZYNQMP_DISP_AV_BUF_CLK_SRC_AUD_FROM_PS BIT(1)
+#define ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_INTERNAL_TIMING BIT(2)
+#define ZYNQMP_DISP_AV_BUF_SRST_REG 0x124
+#define ZYNQMP_DISP_AV_BUF_SRST_REG_VID_RST BIT(1)
+#define ZYNQMP_DISP_AV_BUF_AUDIO_CH_CONFIG 0x12c
+#define ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(n) (0x200 + ((n) * 4))
+#define ZYNQMP_DISP_AV_BUF_VID_COMP_SF(n) (0x20c + ((n) * 4))
+#define ZYNQMP_DISP_AV_BUF_LIVD_VID_COMP_SF(n) (0x218 + ((n) * 4))
+#define ZYNQMP_DISP_AV_BUF_LIVE_VID_CONFIG 0x224
+#define ZYNQMP_DISP_AV_BUF_LIVD_GFX_COMP_SF(n) (0x228 + ((n) * 4))
+#define ZYNQMP_DISP_AV_BUF_LIVE_GFX_CONFIG 0x234
+#define ZYNQMP_DISP_AV_BUF_4BIT_SF 0x11111
+#define ZYNQMP_DISP_AV_BUF_5BIT_SF 0x10842
+#define ZYNQMP_DISP_AV_BUF_6BIT_SF 0x10410
+#define ZYNQMP_DISP_AV_BUF_8BIT_SF 0x10101
+#define ZYNQMP_DISP_AV_BUF_10BIT_SF 0x10040
+#define ZYNQMP_DISP_AV_BUF_NULL_SF 0
+#define ZYNQMP_DISP_AV_BUF_NUM_SF 3
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_6 0x0
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_8 0x1
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_10 0x2
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_12 0x3
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_BPC_MASK GENMASK(2, 0)
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_RGB 0x0
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_YUV444 0x1
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_YUV422 0x2
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_YONLY 0x3
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_FMT_MASK GENMASK(5, 4)
+#define ZYNQMP_DISP_AV_BUF_LIVE_CONFIG_CB_FIRST BIT(8)
+#define ZYNQMP_DISP_AV_BUF_PALETTE_MEMORY 0x400
+
+/* Audio registers */
+#define ZYNQMP_DISP_AUD_MIXER_VOLUME 0x0
+#define ZYNQMP_DISP_AUD_MIXER_VOLUME_NO_SCALE 0x20002000
+#define ZYNQMP_DISP_AUD_MIXER_META_DATA 0x4
+#define ZYNQMP_DISP_AUD_CH_STATUS0 0x8
+#define ZYNQMP_DISP_AUD_CH_STATUS1 0xc
+#define ZYNQMP_DISP_AUD_CH_STATUS2 0x10
+#define ZYNQMP_DISP_AUD_CH_STATUS3 0x14
+#define ZYNQMP_DISP_AUD_CH_STATUS4 0x18
+#define ZYNQMP_DISP_AUD_CH_STATUS5 0x1c
+#define ZYNQMP_DISP_AUD_CH_A_DATA0 0x20
+#define ZYNQMP_DISP_AUD_CH_A_DATA1 0x24
+#define ZYNQMP_DISP_AUD_CH_A_DATA2 0x28
+#define ZYNQMP_DISP_AUD_CH_A_DATA3 0x2c
+#define ZYNQMP_DISP_AUD_CH_A_DATA4 0x30
+#define ZYNQMP_DISP_AUD_CH_A_DATA5 0x34
+#define ZYNQMP_DISP_AUD_CH_B_DATA0 0x38
+#define ZYNQMP_DISP_AUD_CH_B_DATA1 0x3c
+#define ZYNQMP_DISP_AUD_CH_B_DATA2 0x40
+#define ZYNQMP_DISP_AUD_CH_B_DATA3 0x44
+#define ZYNQMP_DISP_AUD_CH_B_DATA4 0x48
+#define ZYNQMP_DISP_AUD_CH_B_DATA5 0x4c
+#define ZYNQMP_DISP_AUD_SOFT_RESET 0xc00
+#define ZYNQMP_DISP_AUD_SOFT_RESET_AUD_SRST BIT(0)
+
+#endif /* _ZYNQMP_DISP_REGS_H_ */
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
new file mode 100644
index 0000000000000000000000000000000000000000..821f7a71e1824702f45e1ccc9f588e6023dfb90d
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -0,0 +1,1734 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP DisplayPort Driver
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_device.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_of.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_simple_kms_helper.h>
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/phy/phy.h>
+#include <linux/reset.h>
+
+#include "zynqmp_disp.h"
+#include "zynqmp_dp.h"
+#include "zynqmp_dpsub.h"
+
+static uint zynqmp_dp_aux_timeout_ms = 50;
+module_param_named(aux_timeout_ms, zynqmp_dp_aux_timeout_ms, uint, 0444);
+MODULE_PARM_DESC(aux_timeout_ms, "DP aux timeout value in msec (default: 50)");
+
+/*
+ * Some sink requires a delay after power on request
+ */
+static uint zynqmp_dp_power_on_delay_ms = 4;
+module_param_named(power_on_delay_ms, zynqmp_dp_power_on_delay_ms, uint, 0444);
+MODULE_PARM_DESC(aux_timeout_ms, "DP power on delay in msec (default: 4)");
+
+/* Link configuration registers */
+#define ZYNQMP_DP_LINK_BW_SET 0x0
+#define ZYNQMP_DP_LANE_COUNT_SET 0x4
+#define ZYNQMP_DP_ENHANCED_FRAME_EN 0x8
+#define ZYNQMP_DP_TRAINING_PATTERN_SET 0xc
+#define ZYNQMP_DP_SCRAMBLING_DISABLE 0x14
+#define ZYNQMP_DP_DOWNSPREAD_CTL 0x18
+#define ZYNQMP_DP_SOFTWARE_RESET 0x1c
+#define ZYNQMP_DP_SOFTWARE_RESET_STREAM1 BIT(0)
+#define ZYNQMP_DP_SOFTWARE_RESET_STREAM2 BIT(1)
+#define ZYNQMP_DP_SOFTWARE_RESET_STREAM3 BIT(2)
+#define ZYNQMP_DP_SOFTWARE_RESET_STREAM4 BIT(3)
+#define ZYNQMP_DP_SOFTWARE_RESET_AUX BIT(7)
+#define ZYNQMP_DP_SOFTWARE_RESET_ALL (ZYNQMP_DP_SOFTWARE_RESET_STREAM1 | \
+ ZYNQMP_DP_SOFTWARE_RESET_STREAM2 | \
+ ZYNQMP_DP_SOFTWARE_RESET_STREAM3 | \
+ ZYNQMP_DP_SOFTWARE_RESET_STREAM4 | \
+ ZYNQMP_DP_SOFTWARE_RESET_AUX)
+
+/* Core enable registers */
+#define ZYNQMP_DP_TRANSMITTER_ENABLE 0x80
+#define ZYNQMP_DP_MAIN_STREAM_ENABLE 0x84
+#define ZYNQMP_DP_FORCE_SCRAMBLER_RESET 0xc0
+#define ZYNQMP_DP_VERSION 0xf8
+#define ZYNQMP_DP_VERSION_MAJOR_MASK GENMASK(31, 24)
+#define ZYNQMP_DP_VERSION_MAJOR_SHIFT 24
+#define ZYNQMP_DP_VERSION_MINOR_MASK GENMASK(23, 16)
+#define ZYNQMP_DP_VERSION_MINOR_SHIFT 16
+#define ZYNQMP_DP_VERSION_REVISION_MASK GENMASK(15, 12)
+#define ZYNQMP_DP_VERSION_REVISION_SHIFT 12
+#define ZYNQMP_DP_VERSION_PATCH_MASK GENMASK(11, 8)
+#define ZYNQMP_DP_VERSION_PATCH_SHIFT 8
+#define ZYNQMP_DP_VERSION_INTERNAL_MASK GENMASK(7, 0)
+#define ZYNQMP_DP_VERSION_INTERNAL_SHIFT 0
+
+/* Core ID registers */
+#define ZYNQMP_DP_CORE_ID 0xfc
+#define ZYNQMP_DP_CORE_ID_MAJOR_MASK GENMASK(31, 24)
+#define ZYNQMP_DP_CORE_ID_MAJOR_SHIFT 24
+#define ZYNQMP_DP_CORE_ID_MINOR_MASK GENMASK(23, 16)
+#define ZYNQMP_DP_CORE_ID_MINOR_SHIFT 16
+#define ZYNQMP_DP_CORE_ID_REVISION_MASK GENMASK(15, 8)
+#define ZYNQMP_DP_CORE_ID_REVISION_SHIFT 8
+#define ZYNQMP_DP_CORE_ID_DIRECTION GENMASK(1)
+
+/* AUX channel interface registers */
+#define ZYNQMP_DP_AUX_COMMAND 0x100
+#define ZYNQMP_DP_AUX_COMMAND_CMD_SHIFT 8
+#define ZYNQMP_DP_AUX_COMMAND_ADDRESS_ONLY BIT(12)
+#define ZYNQMP_DP_AUX_COMMAND_BYTES_SHIFT 0
+#define ZYNQMP_DP_AUX_WRITE_FIFO 0x104
+#define ZYNQMP_DP_AUX_ADDRESS 0x108
+#define ZYNQMP_DP_AUX_CLK_DIVIDER 0x10c
+#define ZYNQMP_DP_AUX_CLK_DIVIDER_AUX_FILTER_SHIFT 8
+#define ZYNQMP_DP_INTERRUPT_SIGNAL_STATE 0x130
+#define ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD BIT(0)
+#define ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_REQUEST BIT(1)
+#define ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_REPLY BIT(2)
+#define ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_REPLY_TIMEOUT BIT(3)
+#define ZYNQMP_DP_AUX_REPLY_DATA 0x134
+#define ZYNQMP_DP_AUX_REPLY_CODE 0x138
+#define ZYNQMP_DP_AUX_REPLY_CODE_AUX_ACK (0)
+#define ZYNQMP_DP_AUX_REPLY_CODE_AUX_NACK BIT(0)
+#define ZYNQMP_DP_AUX_REPLY_CODE_AUX_DEFER BIT(1)
+#define ZYNQMP_DP_AUX_REPLY_CODE_I2C_ACK (0)
+#define ZYNQMP_DP_AUX_REPLY_CODE_I2C_NACK BIT(2)
+#define ZYNQMP_DP_AUX_REPLY_CODE_I2C_DEFER BIT(3)
+#define ZYNQMP_DP_AUX_REPLY_COUNT 0x13c
+#define ZYNQMP_DP_REPLY_DATA_COUNT 0x148
+#define ZYNQMP_DP_REPLY_DATA_COUNT_MASK 0xff
+#define ZYNQMP_DP_INT_STATUS 0x3a0
+#define ZYNQMP_DP_INT_MASK 0x3a4
+#define ZYNQMP_DP_INT_EN 0x3a8
+#define ZYNQMP_DP_INT_DS 0x3ac
+#define ZYNQMP_DP_INT_HPD_IRQ BIT(0)
+#define ZYNQMP_DP_INT_HPD_EVENT BIT(1)
+#define ZYNQMP_DP_INT_REPLY_RECEIVED BIT(2)
+#define ZYNQMP_DP_INT_REPLY_TIMEOUT BIT(3)
+#define ZYNQMP_DP_INT_HPD_PULSE_DET BIT(4)
+#define ZYNQMP_DP_INT_EXT_PKT_TXD BIT(5)
+#define ZYNQMP_DP_INT_LIV_ABUF_UNDRFLW BIT(12)
+#define ZYNQMP_DP_INT_VBLANK_START BIT(13)
+#define ZYNQMP_DP_INT_PIXEL1_MATCH BIT(14)
+#define ZYNQMP_DP_INT_PIXEL0_MATCH BIT(15)
+#define ZYNQMP_DP_INT_CHBUF_UNDERFLW_MASK 0x3f0000
+#define ZYNQMP_DP_INT_CHBUF_OVERFLW_MASK 0xfc00000
+#define ZYNQMP_DP_INT_CUST_TS_2 BIT(28)
+#define ZYNQMP_DP_INT_CUST_TS BIT(29)
+#define ZYNQMP_DP_INT_EXT_VSYNC_TS BIT(30)
+#define ZYNQMP_DP_INT_VSYNC_TS BIT(31)
+#define ZYNQMP_DP_INT_ALL (ZYNQMP_DP_INT_HPD_IRQ | \
+ ZYNQMP_DP_INT_HPD_EVENT | \
+ ZYNQMP_DP_INT_CHBUF_UNDERFLW_MASK | \
+ ZYNQMP_DP_INT_CHBUF_OVERFLW_MASK)
+
+/* Main stream attribute registers */
+#define ZYNQMP_DP_MAIN_STREAM_HTOTAL 0x180
+#define ZYNQMP_DP_MAIN_STREAM_VTOTAL 0x184
+#define ZYNQMP_DP_MAIN_STREAM_POLARITY 0x188
+#define ZYNQMP_DP_MAIN_STREAM_POLARITY_HSYNC_SHIFT 0
+#define ZYNQMP_DP_MAIN_STREAM_POLARITY_VSYNC_SHIFT 1
+#define ZYNQMP_DP_MAIN_STREAM_HSWIDTH 0x18c
+#define ZYNQMP_DP_MAIN_STREAM_VSWIDTH 0x190
+#define ZYNQMP_DP_MAIN_STREAM_HRES 0x194
+#define ZYNQMP_DP_MAIN_STREAM_VRES 0x198
+#define ZYNQMP_DP_MAIN_STREAM_HSTART 0x19c
+#define ZYNQMP_DP_MAIN_STREAM_VSTART 0x1a0
+#define ZYNQMP_DP_MAIN_STREAM_MISC0 0x1a4
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK BIT(0)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_RGB (0 << 1)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_YCRCB_422 (5 << 1)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_YCRCB_444 (6 << 1)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_MASK (7 << 1)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_DYNAMIC_RANGE BIT(3)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_YCBCR_COLR BIT(4)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_6 (0 << 5)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_8 (1 << 5)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_10 (2 << 5)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_12 (3 << 5)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_16 (4 << 5)
+#define ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_MASK (7 << 5)
+#define ZYNQMP_DP_MAIN_STREAM_MISC1 0x1a8
+#define ZYNQMP_DP_MAIN_STREAM_MISC1_Y_ONLY_EN BIT(7)
+#define ZYNQMP_DP_MAIN_STREAM_M_VID 0x1ac
+#define ZYNQMP_DP_MSA_TRANSFER_UNIT_SIZE 0x1b0
+#define ZYNQMP_DP_MSA_TRANSFER_UNIT_SIZE_TU_SIZE_DEF 64
+#define ZYNQMP_DP_MAIN_STREAM_N_VID 0x1b4
+#define ZYNQMP_DP_USER_PIX_WIDTH 0x1b8
+#define ZYNQMP_DP_USER_DATA_COUNT_PER_LANE 0x1bc
+#define ZYNQMP_DP_MIN_BYTES_PER_TU 0x1c4
+#define ZYNQMP_DP_FRAC_BYTES_PER_TU 0x1c8
+#define ZYNQMP_DP_INIT_WAIT 0x1cc
+
+/* PHY configuration and status registers */
+#define ZYNQMP_DP_PHY_RESET 0x200
+#define ZYNQMP_DP_PHY_RESET_PHY_RESET BIT(0)
+#define ZYNQMP_DP_PHY_RESET_GTTX_RESET BIT(1)
+#define ZYNQMP_DP_PHY_RESET_PHY_PMA_RESET BIT(8)
+#define ZYNQMP_DP_PHY_RESET_PHY_PCS_RESET BIT(9)
+#define ZYNQMP_DP_PHY_RESET_ALL_RESET (ZYNQMP_DP_PHY_RESET_PHY_RESET | \
+ ZYNQMP_DP_PHY_RESET_GTTX_RESET | \
+ ZYNQMP_DP_PHY_RESET_PHY_PMA_RESET | \
+ ZYNQMP_DP_PHY_RESET_PHY_PCS_RESET)
+#define ZYNQMP_DP_PHY_PREEMPHASIS_LANE_0 0x210
+#define ZYNQMP_DP_PHY_PREEMPHASIS_LANE_1 0x214
+#define ZYNQMP_DP_PHY_PREEMPHASIS_LANE_2 0x218
+#define ZYNQMP_DP_PHY_PREEMPHASIS_LANE_3 0x21c
+#define ZYNQMP_DP_PHY_VOLTAGE_DIFF_LANE_0 0x220
+#define ZYNQMP_DP_PHY_VOLTAGE_DIFF_LANE_1 0x224
+#define ZYNQMP_DP_PHY_VOLTAGE_DIFF_LANE_2 0x228
+#define ZYNQMP_DP_PHY_VOLTAGE_DIFF_LANE_3 0x22c
+#define ZYNQMP_DP_PHY_CLOCK_SELECT 0x234
+#define ZYNQMP_DP_PHY_CLOCK_SELECT_1_62G 0x1
+#define ZYNQMP_DP_PHY_CLOCK_SELECT_2_70G 0x3
+#define ZYNQMP_DP_PHY_CLOCK_SELECT_5_40G 0x5
+#define ZYNQMP_DP_TX_PHY_POWER_DOWN 0x238
+#define ZYNQMP_DP_TX_PHY_POWER_DOWN_LANE_0 BIT(0)
+#define ZYNQMP_DP_TX_PHY_POWER_DOWN_LANE_1 BIT(1)
+#define ZYNQMP_DP_TX_PHY_POWER_DOWN_LANE_2 BIT(2)
+#define ZYNQMP_DP_TX_PHY_POWER_DOWN_LANE_3 BIT(3)
+#define ZYNQMP_DP_TX_PHY_POWER_DOWN_ALL 0xf
+#define ZYNQMP_DP_PHY_PRECURSOR_LANE_0 0x23c
+#define ZYNQMP_DP_PHY_PRECURSOR_LANE_1 0x240
+#define ZYNQMP_DP_PHY_PRECURSOR_LANE_2 0x244
+#define ZYNQMP_DP_PHY_PRECURSOR_LANE_3 0x248
+#define ZYNQMP_DP_PHY_POSTCURSOR_LANE_0 0x24c
+#define ZYNQMP_DP_PHY_POSTCURSOR_LANE_1 0x250
+#define ZYNQMP_DP_PHY_POSTCURSOR_LANE_2 0x254
+#define ZYNQMP_DP_PHY_POSTCURSOR_LANE_3 0x258
+#define ZYNQMP_DP_SUB_TX_PHY_PRECURSOR_LANE_0 0x24c
+#define ZYNQMP_DP_SUB_TX_PHY_PRECURSOR_LANE_1 0x250
+#define ZYNQMP_DP_PHY_STATUS 0x280
+#define ZYNQMP_DP_PHY_STATUS_PLL_LOCKED_SHIFT 4
+#define ZYNQMP_DP_PHY_STATUS_FPGA_PLL_LOCKED BIT(6)
+
+/* Audio registers */
+#define ZYNQMP_DP_TX_AUDIO_CONTROL 0x300
+#define ZYNQMP_DP_TX_AUDIO_CHANNELS 0x304
+#define ZYNQMP_DP_TX_AUDIO_INFO_DATA 0x308
+#define ZYNQMP_DP_TX_M_AUD 0x328
+#define ZYNQMP_DP_TX_N_AUD 0x32c
+#define ZYNQMP_DP_TX_AUDIO_EXT_DATA 0x330
+
+#define ZYNQMP_DP_MAX_LANES 2
+#define ZYNQMP_MAX_FREQ 3000000
+
+#define DP_REDUCED_BIT_RATE 162000
+#define DP_HIGH_BIT_RATE 270000
+#define DP_HIGH_BIT_RATE2 540000
+#define DP_MAX_TRAINING_TRIES 5
+#define DP_V1_2 0x12
+
+/**
+ * struct zynqmp_dp_link_config - Common link config between source and sink
+ * @max_rate: maximum link rate
+ * @max_lanes: maximum number of lanes
+ */
+struct zynqmp_dp_link_config {
+ int max_rate;
+ u8 max_lanes;
+};
+
+/**
+ * struct zynqmp_dp_mode - Configured mode of DisplayPort
+ * @bw_code: code for bandwidth(link rate)
+ * @lane_cnt: number of lanes
+ * @pclock: pixel clock frequency of current mode
+ * @fmt: format identifier string
+ */
+struct zynqmp_dp_mode {
+ u8 bw_code;
+ u8 lane_cnt;
+ int pclock;
+ const char *fmt;
+};
+
+/**
+ * struct zynqmp_dp_config - Configuration of DisplayPort from DTS
+ * @misc0: misc0 configuration (per DP v1.2 spec)
+ * @misc1: misc1 configuration (per DP v1.2 spec)
+ * @bpp: bits per pixel
+ */
+struct zynqmp_dp_config {
+ u8 misc0;
+ u8 misc1;
+ u8 bpp;
+};
+
+/**
+ * struct zynqmp_dp - Xilinx DisplayPort core
+ * @encoder: the drm encoder structure
+ * @connector: the drm connector structure
+ * @dev: device structure
+ * @dpsub: Display subsystem
+ * @drm: DRM core
+ * @iomem: device I/O memory for register access
+ * @reset: reset controller
+ * @irq: irq
+ * @config: IP core configuration from DTS
+ * @aux: aux channel
+ * @phy: PHY handles for DP lanes
+ * @num_lanes: number of enabled phy lanes
+ * @hpd_work: hot plug detection worker
+ * @status: connection status
+ * @enabled: flag to indicate if the device is enabled
+ * @dpcd: DP configuration data from currently connected sink device
+ * @link_config: common link configuration between IP core and sink device
+ * @mode: current mode between IP core and sink device
+ * @train_set: set of training data
+ */
+struct zynqmp_dp {
+ struct drm_encoder encoder;
+ struct drm_connector connector;
+ struct device *dev;
+ struct zynqmp_dpsub *dpsub;
+ struct drm_device *drm;
+ void __iomem *iomem;
+ struct reset_control *reset;
+ int irq;
+
+ struct zynqmp_dp_config config;
+ struct drm_dp_aux aux;
+ struct phy *phy[ZYNQMP_DP_MAX_LANES];
+ u8 num_lanes;
+ struct delayed_work hpd_work;
+ enum drm_connector_status status;
+ bool enabled;
+
+ u8 dpcd[DP_RECEIVER_CAP_SIZE];
+ struct zynqmp_dp_link_config link_config;
+ struct zynqmp_dp_mode mode;
+ u8 train_set[ZYNQMP_DP_MAX_LANES];
+};
+
+static inline struct zynqmp_dp *encoder_to_dp(struct drm_encoder *encoder)
+{
+ return container_of(encoder, struct zynqmp_dp, encoder);
+}
+
+static inline struct zynqmp_dp *connector_to_dp(struct drm_connector *connector)
+{
+ return container_of(connector, struct zynqmp_dp, connector);
+}
+
+static void zynqmp_dp_write(struct zynqmp_dp *dp, int offset, u32 val)
+{
+ writel(val, dp->iomem + offset);
+}
+
+static u32 zynqmp_dp_read(struct zynqmp_dp *dp, int offset)
+{
+ return readl(dp->iomem + offset);
+}
+
+static void zynqmp_dp_clr(struct zynqmp_dp *dp, int offset, u32 clr)
+{
+ zynqmp_dp_write(dp, offset, zynqmp_dp_read(dp, offset) & ~clr);
+}
+
+static void zynqmp_dp_set(struct zynqmp_dp *dp, int offset, u32 set)
+{
+ zynqmp_dp_write(dp, offset, zynqmp_dp_read(dp, offset) | set);
+}
+
+/* -----------------------------------------------------------------------------
+ * PHY Handling
+ */
+
+#define RST_TIMEOUT_MS 1000
+
+static int zynqmp_dp_reset(struct zynqmp_dp *dp, bool assert)
+{
+ unsigned long timeout;
+
+ if (assert)
+ reset_control_assert(dp->reset);
+ else
+ reset_control_deassert(dp->reset);
+
+ /* Wait for the (de)assert to complete. */
+ timeout = jiffies + msecs_to_jiffies(RST_TIMEOUT_MS);
+ while (!time_after_eq(jiffies, timeout)) {
+ bool status = !!reset_control_status(dp->reset);
+
+ if (assert == status)
+ return 0;
+
+ cpu_relax();
+ }
+
+ dev_err(dp->dev, "reset %s timeout\n", assert ? "assert" : "deassert");
+ return -ETIMEDOUT;
+}
+
+/**
+ * zynqmp_dp_phy_init - Initialize the phy
+ * @dp: DisplayPort IP core structure
+ *
+ * Initialize the phy.
+ *
+ * Return: 0 if the phy instances are initialized correctly, or the error code
+ * returned from the callee functions.
+ */
+static int zynqmp_dp_phy_init(struct zynqmp_dp *dp)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < dp->num_lanes; i++) {
+ ret = phy_init(dp->phy[i]);
+ if (ret) {
+ dev_err(dp->dev, "failed to init phy lane %d\n", i);
+ return ret;
+ }
+ }
+
+ ret = zynqmp_dp_reset(dp, false);
+ if (ret < 0)
+ return ret;
+
+ zynqmp_dp_clr(dp, ZYNQMP_DP_PHY_RESET, ZYNQMP_DP_PHY_RESET_ALL_RESET);
+
+ /*
+ * Power on lanes in reverse order as only lane 0 waits for the PLL to
+ * lock.
+ */
+ for (i = dp->num_lanes - 1; i >= 0; i--) {
+ ret = phy_power_on(dp->phy[i]);
+ if (ret) {
+ dev_err(dp->dev, "failed to power on phy lane %d\n", i);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_phy_exit - Exit the phy
+ * @dp: DisplayPort IP core structure
+ *
+ * Exit the phy.
+ */
+static void zynqmp_dp_phy_exit(struct zynqmp_dp *dp)
+{
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < dp->num_lanes; i++) {
+ ret = phy_power_off(dp->phy[i]);
+ if (ret)
+ dev_err(dp->dev, "failed to power off phy(%d) %d\n", i,
+ ret);
+ }
+
+ zynqmp_dp_reset(dp, true);
+
+ for (i = 0; i < dp->num_lanes; i++) {
+ ret = phy_exit(dp->phy[i]);
+ if (ret)
+ dev_err(dp->dev, "failed to exit phy(%d) %d\n", i, ret);
+ }
+}
+
+/**
+ * zynqmp_dp_phy_probe - Probe the PHYs
+ * @dp: DisplayPort IP core structure
+ *
+ * Probe PHYs for all lanes. Less PHYs may be available than the number of
+ * lanes, which is not considered an error as long as at least one PHY is
+ * found. The caller can check dp->num_lanes to check how many PHYs were found.
+ *
+ * Return:
+ * * 0 - Success
+ * * -ENXIO - No PHY found
+ * * -EPROBE_DEFER - Probe deferral requested
+ * * Other negative value - PHY retrieval failure
+ */
+static int zynqmp_dp_phy_probe(struct zynqmp_dp *dp)
+{
+ unsigned int i;
+
+ for (i = 0; i < ZYNQMP_DP_MAX_LANES; i++) {
+ char phy_name[16];
+ struct phy *phy;
+
+ snprintf(phy_name, sizeof(phy_name), "dp-phy%d", i);
+ phy = devm_phy_get(dp->dev, phy_name);
+
+ if (IS_ERR(phy)) {
+ switch (PTR_ERR(phy)) {
+ case -ENODEV:
+ if (dp->num_lanes)
+ return 0;
+
+ dev_err(dp->dev, "no PHY found\n");
+ return -ENXIO;
+
+ case -EPROBE_DEFER:
+ return -EPROBE_DEFER;
+
+ default:
+ dev_err(dp->dev, "failed to get PHY lane %u\n",
+ i);
+ return PTR_ERR(phy);
+ }
+ }
+
+ dp->phy[i] = phy;
+ dp->num_lanes++;
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_phy_ready - Check if PHY is ready
+ * @dp: DisplayPort IP core structure
+ *
+ * Check if PHY is ready. If PHY is not ready, wait 1ms to check for 100 times.
+ * This amount of delay was suggested by IP designer.
+ *
+ * Return: 0 if PHY is ready, or -ENODEV if PHY is not ready.
+ */
+static int zynqmp_dp_phy_ready(struct zynqmp_dp *dp)
+{
+ u32 i, reg, ready;
+
+ ready = (1 << dp->num_lanes) - 1;
+
+ /* Wait for 100 * 1ms. This should be enough time for PHY to be ready */
+ for (i = 0; ; i++) {
+ reg = zynqmp_dp_read(dp, ZYNQMP_DP_PHY_STATUS);
+ if ((reg & ready) == ready)
+ return 0;
+
+ if (i == 100) {
+ dev_err(dp->dev, "PHY isn't ready\n");
+ return -ENODEV;
+ }
+
+ usleep_range(1000, 1100);
+ }
+
+ return 0;
+}
+
+/* -----------------------------------------------------------------------------
+ * DisplayPort Link Training
+ */
+
+/**
+ * zynqmp_dp_max_rate - Calculate and return available max pixel clock
+ * @link_rate: link rate (Kilo-bytes / sec)
+ * @lane_num: number of lanes
+ * @bpp: bits per pixel
+ *
+ * Return: max pixel clock (KHz) supported by current link config.
+ */
+static inline int zynqmp_dp_max_rate(int link_rate, u8 lane_num, u8 bpp)
+{
+ return link_rate * lane_num * 8 / bpp;
+}
+
+/**
+ * zynqmp_dp_mode_configure - Configure the link values
+ * @dp: DisplayPort IP core structure
+ * @pclock: pixel clock for requested display mode
+ * @current_bw: current link rate
+ *
+ * Find the link configuration values, rate and lane count for requested pixel
+ * clock @pclock. The @pclock is stored in the mode to be used in other
+ * functions later. The returned rate is downshifted from the current rate
+ * @current_bw.
+ *
+ * Return: Current link rate code, or -EINVAL.
+ */
+static int zynqmp_dp_mode_configure(struct zynqmp_dp *dp, int pclock,
+ u8 current_bw)
+{
+ int max_rate = dp->link_config.max_rate;
+ u8 bws[3] = { DP_LINK_BW_1_62, DP_LINK_BW_2_7, DP_LINK_BW_5_4 };
+ u8 max_lanes = dp->link_config.max_lanes;
+ u8 max_link_rate_code = drm_dp_link_rate_to_bw_code(max_rate);
+ u8 bpp = dp->config.bpp;
+ u8 lane_cnt;
+ s8 i;
+
+ if (current_bw == DP_LINK_BW_1_62) {
+ dev_err(dp->dev, "can't downshift. already lowest link rate\n");
+ return -EINVAL;
+ }
+
+ for (i = ARRAY_SIZE(bws) - 1; i >= 0; i--) {
+ if (current_bw && bws[i] >= current_bw)
+ continue;
+
+ if (bws[i] <= max_link_rate_code)
+ break;
+ }
+
+ for (lane_cnt = 1; lane_cnt <= max_lanes; lane_cnt <<= 1) {
+ int bw;
+ u32 rate;
+
+ bw = drm_dp_bw_code_to_link_rate(bws[i]);
+ rate = zynqmp_dp_max_rate(bw, lane_cnt, bpp);
+ if (pclock <= rate) {
+ dp->mode.bw_code = bws[i];
+ dp->mode.lane_cnt = lane_cnt;
+ dp->mode.pclock = pclock;
+ return dp->mode.bw_code;
+ }
+ }
+
+ dev_err(dp->dev, "failed to configure link values\n");
+
+ return -EINVAL;
+}
+
+/**
+ * zynqmp_dp_adjust_train - Adjust train values
+ * @dp: DisplayPort IP core structure
+ * @link_status: link status from sink which contains requested training values
+ */
+static void zynqmp_dp_adjust_train(struct zynqmp_dp *dp,
+ u8 link_status[DP_LINK_STATUS_SIZE])
+{
+ u8 *train_set = dp->train_set;
+ u8 voltage = 0, preemphasis = 0;
+ u8 i;
+
+ for (i = 0; i < dp->mode.lane_cnt; i++) {
+ u8 v = drm_dp_get_adjust_request_voltage(link_status, i);
+ u8 p = drm_dp_get_adjust_request_pre_emphasis(link_status, i);
+
+ if (v > voltage)
+ voltage = v;
+
+ if (p > preemphasis)
+ preemphasis = p;
+ }
+
+ if (voltage >= DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
+ voltage |= DP_TRAIN_MAX_SWING_REACHED;
+
+ if (preemphasis >= DP_TRAIN_PRE_EMPH_LEVEL_2)
+ preemphasis |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
+
+ for (i = 0; i < dp->mode.lane_cnt; i++)
+ train_set[i] = voltage | preemphasis;
+}
+
+/**
+ * zynqmp_dp_update_vs_emph - Update the training values
+ * @dp: DisplayPort IP core structure
+ *
+ * Update the training values based on the request from sink. The mapped values
+ * are predefined, and values(vs, pe, pc) are from the device manual.
+ *
+ * Return: 0 if vs and emph are updated successfully, or the error code returned
+ * by drm_dp_dpcd_write().
+ */
+static int zynqmp_dp_update_vs_emph(struct zynqmp_dp *dp)
+{
+ unsigned int i;
+ int ret;
+
+ ret = drm_dp_dpcd_write(&dp->aux, DP_TRAINING_LANE0_SET, dp->train_set,
+ dp->mode.lane_cnt);
+ if (ret < 0)
+ return ret;
+
+ for (i = 0; i < dp->mode.lane_cnt; i++) {
+ u32 reg = ZYNQMP_DP_SUB_TX_PHY_PRECURSOR_LANE_0 + i * 4;
+ union phy_configure_opts opts = { 0 };
+ u8 train = dp->train_set[i];
+
+ opts.dp.voltage[0] = (train & DP_TRAIN_VOLTAGE_SWING_MASK)
+ >> DP_TRAIN_VOLTAGE_SWING_SHIFT;
+ opts.dp.pre[0] = (train & DP_TRAIN_PRE_EMPHASIS_MASK)
+ >> DP_TRAIN_PRE_EMPHASIS_SHIFT;
+
+ phy_configure(dp->phy[i], &opts);
+
+ zynqmp_dp_write(dp, reg, 0x2);
+ }
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_link_train_cr - Train clock recovery
+ * @dp: DisplayPort IP core structure
+ *
+ * Return: 0 if clock recovery train is done successfully, or corresponding
+ * error code.
+ */
+static int zynqmp_dp_link_train_cr(struct zynqmp_dp *dp)
+{
+ u8 link_status[DP_LINK_STATUS_SIZE];
+ u8 lane_cnt = dp->mode.lane_cnt;
+ u8 vs = 0, tries = 0;
+ u16 max_tries, i;
+ bool cr_done;
+ int ret;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_1);
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_1 |
+ DP_LINK_SCRAMBLING_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * 256 loops should be maximum iterations for 4 lanes and 4 values.
+ * So, This loop should exit before 512 iterations
+ */
+ for (max_tries = 0; max_tries < 512; max_tries++) {
+ ret = zynqmp_dp_update_vs_emph(dp);
+ if (ret)
+ return ret;
+
+ drm_dp_link_train_clock_recovery_delay(dp->dpcd);
+ ret = drm_dp_dpcd_read_link_status(&dp->aux, link_status);
+ if (ret < 0)
+ return ret;
+
+ cr_done = drm_dp_clock_recovery_ok(link_status, lane_cnt);
+ if (cr_done)
+ break;
+
+ for (i = 0; i < lane_cnt; i++)
+ if (!(dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED))
+ break;
+ if (i == lane_cnt)
+ break;
+
+ if ((dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == vs)
+ tries++;
+ else
+ tries = 0;
+
+ if (tries == DP_MAX_TRAINING_TRIES)
+ break;
+
+ vs = dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK;
+ zynqmp_dp_adjust_train(dp, link_status);
+ }
+
+ if (!cr_done)
+ return -EIO;
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_link_train_ce - Train channel equalization
+ * @dp: DisplayPort IP core structure
+ *
+ * Return: 0 if channel equalization train is done successfully, or
+ * corresponding error code.
+ */
+static int zynqmp_dp_link_train_ce(struct zynqmp_dp *dp)
+{
+ u8 link_status[DP_LINK_STATUS_SIZE];
+ u8 lane_cnt = dp->mode.lane_cnt;
+ u32 pat, tries;
+ int ret;
+ bool ce_done;
+
+ if (dp->dpcd[DP_DPCD_REV] >= DP_V1_2 &&
+ dp->dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED)
+ pat = DP_TRAINING_PATTERN_3;
+ else
+ pat = DP_TRAINING_PATTERN_2;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_TRAINING_PATTERN_SET, pat);
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ pat | DP_LINK_SCRAMBLING_DISABLE);
+ if (ret < 0)
+ return ret;
+
+ for (tries = 0; tries < DP_MAX_TRAINING_TRIES; tries++) {
+ ret = zynqmp_dp_update_vs_emph(dp);
+ if (ret)
+ return ret;
+
+ drm_dp_link_train_channel_eq_delay(dp->dpcd);
+ ret = drm_dp_dpcd_read_link_status(&dp->aux, link_status);
+ if (ret < 0)
+ return ret;
+
+ ce_done = drm_dp_channel_eq_ok(link_status, lane_cnt);
+ if (ce_done)
+ break;
+
+ zynqmp_dp_adjust_train(dp, link_status);
+ }
+
+ if (!ce_done)
+ return -EIO;
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_link_train - Train the link
+ * @dp: DisplayPort IP core structure
+ *
+ * Return: 0 if all trains are done successfully, or corresponding error code.
+ */
+static int zynqmp_dp_train(struct zynqmp_dp *dp)
+{
+ u32 reg;
+ u8 bw_code = dp->mode.bw_code;
+ u8 lane_cnt = dp->mode.lane_cnt;
+ u8 aux_lane_cnt = lane_cnt;
+ bool enhanced;
+ int ret;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_LANE_COUNT_SET, lane_cnt);
+ enhanced = drm_dp_enhanced_frame_cap(dp->dpcd);
+ if (enhanced) {
+ zynqmp_dp_write(dp, ZYNQMP_DP_ENHANCED_FRAME_EN, 1);
+ aux_lane_cnt |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
+ }
+
+ if (dp->dpcd[3] & 0x1) {
+ zynqmp_dp_write(dp, ZYNQMP_DP_DOWNSPREAD_CTL, 1);
+ drm_dp_dpcd_writeb(&dp->aux, DP_DOWNSPREAD_CTRL,
+ DP_SPREAD_AMP_0_5);
+ } else {
+ zynqmp_dp_write(dp, ZYNQMP_DP_DOWNSPREAD_CTL, 0);
+ drm_dp_dpcd_writeb(&dp->aux, DP_DOWNSPREAD_CTRL, 0);
+ }
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_LANE_COUNT_SET, aux_lane_cnt);
+ if (ret < 0) {
+ dev_err(dp->dev, "failed to set lane count\n");
+ return ret;
+ }
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_MAIN_LINK_CHANNEL_CODING_SET,
+ DP_SET_ANSI_8B10B);
+ if (ret < 0) {
+ dev_err(dp->dev, "failed to set ANSI 8B/10B encoding\n");
+ return ret;
+ }
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_LINK_BW_SET, bw_code);
+ if (ret < 0) {
+ dev_err(dp->dev, "failed to set DP bandwidth\n");
+ return ret;
+ }
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_LINK_BW_SET, bw_code);
+ switch (bw_code) {
+ case DP_LINK_BW_1_62:
+ reg = ZYNQMP_DP_PHY_CLOCK_SELECT_1_62G;
+ break;
+ case DP_LINK_BW_2_7:
+ reg = ZYNQMP_DP_PHY_CLOCK_SELECT_2_70G;
+ break;
+ case DP_LINK_BW_5_4:
+ default:
+ reg = ZYNQMP_DP_PHY_CLOCK_SELECT_5_40G;
+ break;
+ }
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_PHY_CLOCK_SELECT, reg);
+ ret = zynqmp_dp_phy_ready(dp);
+ if (ret < 0)
+ return ret;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_SCRAMBLING_DISABLE, 1);
+ memset(dp->train_set, 0, 4);
+ ret = zynqmp_dp_link_train_cr(dp);
+ if (ret)
+ return ret;
+
+ ret = zynqmp_dp_link_train_ce(dp);
+ if (ret)
+ return ret;
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+ if (ret < 0) {
+ dev_err(dp->dev, "failed to disable training pattern\n");
+ return ret;
+ }
+ zynqmp_dp_write(dp, ZYNQMP_DP_TRAINING_PATTERN_SET,
+ DP_TRAINING_PATTERN_DISABLE);
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_SCRAMBLING_DISABLE, 0);
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_train_loop - Downshift the link rate during training
+ * @dp: DisplayPort IP core structure
+ *
+ * Train the link by downshifting the link rate if training is not successful.
+ */
+static void zynqmp_dp_train_loop(struct zynqmp_dp *dp)
+{
+ struct zynqmp_dp_mode *mode = &dp->mode;
+ u8 bw = mode->bw_code;
+ int ret;
+
+ do {
+ if (dp->status == connector_status_disconnected ||
+ !dp->enabled)
+ return;
+
+ ret = zynqmp_dp_train(dp);
+ if (!ret)
+ return;
+
+ ret = zynqmp_dp_mode_configure(dp, mode->pclock, bw);
+ if (ret < 0)
+ goto err_out;
+
+ bw = ret;
+ } while (bw >= DP_LINK_BW_1_62);
+
+err_out:
+ dev_err(dp->dev, "failed to train the DP link\n");
+}
+
+/* -----------------------------------------------------------------------------
+ * DisplayPort AUX
+ */
+
+#define AUX_READ_BIT 0x1
+
+/**
+ * zynqmp_dp_aux_cmd_submit - Submit aux command
+ * @dp: DisplayPort IP core structure
+ * @cmd: aux command
+ * @addr: aux address
+ * @buf: buffer for command data
+ * @bytes: number of bytes for @buf
+ * @reply: reply code to be returned
+ *
+ * Submit an aux command. All aux related commands, native or i2c aux
+ * read/write, are submitted through this function. The function is mapped to
+ * the transfer function of struct drm_dp_aux. This function involves in
+ * multiple register reads/writes, thus synchronization is needed, and it is
+ * done by drm_dp_helper using @hw_mutex. The calling thread goes into sleep
+ * if there's no immediate reply to the command submission. The reply code is
+ * returned at @reply if @reply != NULL.
+ *
+ * Return: 0 if the command is submitted properly, or corresponding error code:
+ * -EBUSY when there is any request already being processed
+ * -ETIMEDOUT when receiving reply is timed out
+ * -EIO when received bytes are less than requested
+ */
+static int zynqmp_dp_aux_cmd_submit(struct zynqmp_dp *dp, u32 cmd, u16 addr,
+ u8 *buf, u8 bytes, u8 *reply)
+{
+ bool is_read = (cmd & AUX_READ_BIT) ? true : false;
+ u32 reg, i;
+
+ reg = zynqmp_dp_read(dp, ZYNQMP_DP_INTERRUPT_SIGNAL_STATE);
+ if (reg & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_REQUEST)
+ return -EBUSY;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_AUX_ADDRESS, addr);
+ if (!is_read)
+ for (i = 0; i < bytes; i++)
+ zynqmp_dp_write(dp, ZYNQMP_DP_AUX_WRITE_FIFO,
+ buf[i]);
+
+ reg = cmd << ZYNQMP_DP_AUX_COMMAND_CMD_SHIFT;
+ if (!buf || !bytes)
+ reg |= ZYNQMP_DP_AUX_COMMAND_ADDRESS_ONLY;
+ else
+ reg |= (bytes - 1) << ZYNQMP_DP_AUX_COMMAND_BYTES_SHIFT;
+ zynqmp_dp_write(dp, ZYNQMP_DP_AUX_COMMAND, reg);
+
+ /* Wait for reply to be delivered upto 2ms */
+ for (i = 0; ; i++) {
+ reg = zynqmp_dp_read(dp, ZYNQMP_DP_INTERRUPT_SIGNAL_STATE);
+ if (reg & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_REPLY)
+ break;
+
+ if (reg & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_REPLY_TIMEOUT ||
+ i == 2)
+ return -ETIMEDOUT;
+
+ usleep_range(1000, 1100);
+ }
+
+ reg = zynqmp_dp_read(dp, ZYNQMP_DP_AUX_REPLY_CODE);
+ if (reply)
+ *reply = reg;
+
+ if (is_read &&
+ (reg == ZYNQMP_DP_AUX_REPLY_CODE_AUX_ACK ||
+ reg == ZYNQMP_DP_AUX_REPLY_CODE_I2C_ACK)) {
+ reg = zynqmp_dp_read(dp, ZYNQMP_DP_REPLY_DATA_COUNT);
+ if ((reg & ZYNQMP_DP_REPLY_DATA_COUNT_MASK) != bytes)
+ return -EIO;
+
+ for (i = 0; i < bytes; i++)
+ buf[i] = zynqmp_dp_read(dp, ZYNQMP_DP_AUX_REPLY_DATA);
+ }
+
+ return 0;
+}
+
+static ssize_t
+zynqmp_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
+{
+ struct zynqmp_dp *dp = container_of(aux, struct zynqmp_dp, aux);
+ int ret;
+ unsigned int i, iter;
+
+ /* Number of loops = timeout in msec / aux delay (400 usec) */
+ iter = zynqmp_dp_aux_timeout_ms * 1000 / 400;
+ iter = iter ? iter : 1;
+
+ for (i = 0; i < iter; i++) {
+ ret = zynqmp_dp_aux_cmd_submit(dp, msg->request, msg->address,
+ msg->buffer, msg->size,
+ &msg->reply);
+ if (!ret) {
+ dev_dbg(dp->dev, "aux %d retries\n", i);
+ return msg->size;
+ }
+
+ if (dp->status == connector_status_disconnected) {
+ dev_dbg(dp->dev, "no connected aux device\n");
+ return -ENODEV;
+ }
+
+ usleep_range(400, 500);
+ }
+
+ dev_dbg(dp->dev, "failed to do aux transfer (%d)\n", ret);
+
+ return ret;
+}
+
+/**
+ * zynqmp_dp_aux_init - Initialize and register the DP AUX
+ * @dp: DisplayPort IP core structure
+ *
+ * Program the AUX clock divider and filter and register the DP AUX adapter.
+ *
+ * Return: 0 on success, error value otherwise
+ */
+static int zynqmp_dp_aux_init(struct zynqmp_dp *dp)
+{
+ unsigned long rate;
+ unsigned int w;
+
+ /*
+ * The AUX_SIGNAL_WIDTH_FILTER is the number of APB clock cycles
+ * corresponding to the AUX pulse. Allowable values are 8, 16, 24, 32,
+ * 40 and 48. The AUX pulse width must be between 0.4µs and 0.6µs,
+ * compute the w / 8 value corresponding to 0.4µs rounded up, and make
+ * sure it stays below 0.6µs and within the allowable values.
+ */
+ rate = clk_get_rate(dp->dpsub->apb_clk);
+ w = DIV_ROUND_UP(4 * rate, 1000 * 1000 * 10 * 8) * 8;
+ if (w > 6 * rate / (1000 * 1000 * 10) || w > 48) {
+ dev_err(dp->dev, "aclk frequency too high\n");
+ return -EINVAL;
+ }
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_AUX_CLK_DIVIDER,
+ (w << ZYNQMP_DP_AUX_CLK_DIVIDER_AUX_FILTER_SHIFT) |
+ (rate / (1000 * 1000)));
+
+ dp->aux.name = "ZynqMP DP AUX";
+ dp->aux.dev = dp->dev;
+ dp->aux.transfer = zynqmp_dp_aux_transfer;
+
+ return drm_dp_aux_register(&dp->aux);
+}
+
+/**
+ * zynqmp_dp_aux_cleanup - Cleanup the DP AUX
+ * @dp: DisplayPort IP core structure
+ *
+ * Unregister the DP AUX adapter.
+ */
+static void zynqmp_dp_aux_cleanup(struct zynqmp_dp *dp)
+{
+ drm_dp_aux_unregister(&dp->aux);
+}
+
+/* -----------------------------------------------------------------------------
+ * DisplayPort Generic Support
+ */
+
+/**
+ * zynqmp_dp_update_misc - Write the misc registers
+ * @dp: DisplayPort IP core structure
+ *
+ * The misc register values are stored in the structure, and this
+ * function applies the values into the registers.
+ */
+static void zynqmp_dp_update_misc(struct zynqmp_dp *dp)
+{
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_MISC0, dp->config.misc0);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_MISC1, dp->config.misc1);
+}
+
+/**
+ * zynqmp_dp_set_format - Set the input format
+ * @dp: DisplayPort IP core structure
+ * @format: input format
+ * @bpc: bits per component
+ *
+ * Update misc register values based on input @format and @bpc.
+ *
+ * Return: 0 on success, or -EINVAL.
+ */
+static int zynqmp_dp_set_format(struct zynqmp_dp *dp,
+ enum zynqmp_dpsub_format format,
+ unsigned int bpc)
+{
+ static const struct drm_display_info *display;
+ struct zynqmp_dp_config *config = &dp->config;
+ unsigned int num_colors;
+
+ config->misc0 &= ~ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_MASK;
+ config->misc1 &= ~ZYNQMP_DP_MAIN_STREAM_MISC1_Y_ONLY_EN;
+
+ switch (format) {
+ case ZYNQMP_DPSUB_FORMAT_RGB:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_RGB;
+ num_colors = 3;
+ break;
+
+ case ZYNQMP_DPSUB_FORMAT_YCRCB444:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_YCRCB_444;
+ num_colors = 3;
+ break;
+
+ case ZYNQMP_DPSUB_FORMAT_YCRCB422:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_COMP_FORMAT_YCRCB_422;
+ num_colors = 2;
+ break;
+
+ case ZYNQMP_DPSUB_FORMAT_YONLY:
+ config->misc1 |= ZYNQMP_DP_MAIN_STREAM_MISC1_Y_ONLY_EN;
+ num_colors = 1;
+ break;
+
+ default:
+ dev_err(dp->dev, "Invalid colormetry in DT\n");
+ return -EINVAL;
+ }
+
+ display = &dp->connector.display_info;
+ if (display->bpc && bpc > display->bpc) {
+ dev_warn(dp->dev,
+ "downgrading requested %ubpc to display limit %ubpc\n",
+ bpc, display->bpc);
+ bpc = display->bpc;
+ }
+
+ config->misc0 &= ~ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_MASK;
+
+ switch (bpc) {
+ case 6:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_6;
+ break;
+ case 8:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_8;
+ break;
+ case 10:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_10;
+ break;
+ case 12:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_12;
+ break;
+ case 16:
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_16;
+ break;
+ default:
+ dev_warn(dp->dev, "Not supported bpc (%u). fall back to 8bpc\n",
+ bpc);
+ config->misc0 |= ZYNQMP_DP_MAIN_STREAM_MISC0_BPC_8;
+ bpc = 8;
+ break;
+ }
+
+ /* Update the current bpp based on the format. */
+ config->bpp = bpc * num_colors;
+
+ return 0;
+}
+
+/**
+ * zynqmp_dp_encoder_mode_set_transfer_unit - Set the transfer unit values
+ * @dp: DisplayPort IP core structure
+ * @mode: requested display mode
+ *
+ * Set the transfer unit, and calculate all transfer unit size related values.
+ * Calculation is based on DP and IP core specification.
+ */
+static void
+zynqmp_dp_encoder_mode_set_transfer_unit(struct zynqmp_dp *dp,
+ struct drm_display_mode *mode)
+{
+ u32 tu = ZYNQMP_DP_MSA_TRANSFER_UNIT_SIZE_TU_SIZE_DEF;
+ u32 bw, vid_kbytes, avg_bytes_per_tu, init_wait;
+
+ /* Use the max transfer unit size (default) */
+ zynqmp_dp_write(dp, ZYNQMP_DP_MSA_TRANSFER_UNIT_SIZE, tu);
+
+ vid_kbytes = mode->clock * (dp->config.bpp / 8);
+ bw = drm_dp_bw_code_to_link_rate(dp->mode.bw_code);
+ avg_bytes_per_tu = vid_kbytes * tu / (dp->mode.lane_cnt * bw / 1000);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MIN_BYTES_PER_TU,
+ avg_bytes_per_tu / 1000);
+ zynqmp_dp_write(dp, ZYNQMP_DP_FRAC_BYTES_PER_TU,
+ avg_bytes_per_tu % 1000);
+
+ /* Configure the initial wait cycle based on transfer unit size */
+ if (tu < (avg_bytes_per_tu / 1000))
+ init_wait = 0;
+ else if ((avg_bytes_per_tu / 1000) <= 4)
+ init_wait = tu;
+ else
+ init_wait = tu - avg_bytes_per_tu / 1000;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_INIT_WAIT, init_wait);
+}
+
+/**
+ * zynqmp_dp_encoder_mode_set_stream - Configure the main stream
+ * @dp: DisplayPort IP core structure
+ * @mode: requested display mode
+ *
+ * Configure the main stream based on the requested mode @mode. Calculation is
+ * based on IP core specification.
+ */
+static void zynqmp_dp_encoder_mode_set_stream(struct zynqmp_dp *dp,
+ const struct drm_display_mode *mode)
+{
+ u8 lane_cnt = dp->mode.lane_cnt;
+ u32 reg, wpl;
+ unsigned int rate;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_HTOTAL, mode->htotal);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_VTOTAL, mode->vtotal);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_POLARITY,
+ (!!(mode->flags & DRM_MODE_FLAG_PVSYNC) <<
+ ZYNQMP_DP_MAIN_STREAM_POLARITY_VSYNC_SHIFT) |
+ (!!(mode->flags & DRM_MODE_FLAG_PHSYNC) <<
+ ZYNQMP_DP_MAIN_STREAM_POLARITY_HSYNC_SHIFT));
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_HSWIDTH,
+ mode->hsync_end - mode->hsync_start);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_VSWIDTH,
+ mode->vsync_end - mode->vsync_start);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_HRES, mode->hdisplay);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_VRES, mode->vdisplay);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_HSTART,
+ mode->htotal - mode->hsync_start);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_VSTART,
+ mode->vtotal - mode->vsync_start);
+
+ /* In synchronous mode, set the diviers */
+ if (dp->config.misc0 & ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK) {
+ reg = drm_dp_bw_code_to_link_rate(dp->mode.bw_code);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_N_VID, reg);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_M_VID, mode->clock);
+ rate = zynqmp_disp_get_audio_clk_rate(dp->dpsub->disp);
+ if (rate) {
+ dev_dbg(dp->dev, "Audio rate: %d\n", rate / 512);
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_N_AUD, reg);
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_M_AUD, rate / 1000);
+ }
+ }
+
+ /* Only 2 channel audio is supported now */
+ if (zynqmp_disp_audio_enabled(dp->dpsub->disp))
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CHANNELS, 1);
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_USER_PIX_WIDTH, 1);
+
+ /* Translate to the native 16 bit datapath based on IP core spec */
+ wpl = (mode->hdisplay * dp->config.bpp + 15) / 16;
+ reg = wpl + wpl % lane_cnt - lane_cnt;
+ zynqmp_dp_write(dp, ZYNQMP_DP_USER_DATA_COUNT_PER_LANE, reg);
+}
+
+/* -----------------------------------------------------------------------------
+ * DRM Connector
+ */
+
+static enum drm_connector_status
+zynqmp_dp_connector_detect(struct drm_connector *connector, bool force)
+{
+ struct zynqmp_dp *dp = connector_to_dp(connector);
+ struct zynqmp_dp_link_config *link_config = &dp->link_config;
+ u32 state, i;
+ int ret;
+
+ /*
+ * This is from heuristic. It takes some delay (ex, 100 ~ 500 msec) to
+ * get the HPD signal with some monitors.
+ */
+ for (i = 0; i < 10; i++) {
+ state = zynqmp_dp_read(dp, ZYNQMP_DP_INTERRUPT_SIGNAL_STATE);
+ if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD)
+ break;
+ msleep(100);
+ }
+
+ if (state & ZYNQMP_DP_INTERRUPT_SIGNAL_STATE_HPD) {
+ ret = drm_dp_dpcd_read(&dp->aux, 0x0, dp->dpcd,
+ sizeof(dp->dpcd));
+ if (ret < 0) {
+ dev_dbg(dp->dev, "DPCD read failes");
+ goto disconnected;
+ }
+
+ link_config->max_rate = min_t(int,
+ drm_dp_max_link_rate(dp->dpcd),
+ DP_HIGH_BIT_RATE2);
+ link_config->max_lanes = min_t(u8,
+ drm_dp_max_lane_count(dp->dpcd),
+ dp->num_lanes);
+
+ dp->status = connector_status_connected;
+ return connector_status_connected;
+ }
+
+disconnected:
+ dp->status = connector_status_disconnected;
+ return connector_status_disconnected;
+}
+
+static int zynqmp_dp_connector_get_modes(struct drm_connector *connector)
+{
+ struct zynqmp_dp *dp = connector_to_dp(connector);
+ struct edid *edid;
+ int ret;
+
+ edid = drm_get_edid(connector, &dp->aux.ddc);
+ if (!edid)
+ return 0;
+
+ drm_connector_update_edid_property(connector, edid);
+ ret = drm_add_edid_modes(connector, edid);
+ kfree(edid);
+
+ return ret;
+}
+
+static struct drm_encoder *
+zynqmp_dp_connector_best_encoder(struct drm_connector *connector)
+{
+ struct zynqmp_dp *dp = connector_to_dp(connector);
+
+ return &dp->encoder;
+}
+
+static int zynqmp_dp_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct zynqmp_dp *dp = connector_to_dp(connector);
+ u8 max_lanes = dp->link_config.max_lanes;
+ u8 bpp = dp->config.bpp;
+ int max_rate = dp->link_config.max_rate;
+ int rate;
+
+ if (mode->clock > ZYNQMP_MAX_FREQ) {
+ dev_dbg(dp->dev, "filtered the mode, %s,for high pixel rate\n",
+ mode->name);
+ drm_mode_debug_printmodeline(mode);
+ return MODE_CLOCK_HIGH;
+ }
+
+ /* Check with link rate and lane count */
+ rate = zynqmp_dp_max_rate(max_rate, max_lanes, bpp);
+ if (mode->clock > rate) {
+ dev_dbg(dp->dev, "filtered the mode, %s,for high pixel rate\n",
+ mode->name);
+ drm_mode_debug_printmodeline(mode);
+ return MODE_CLOCK_HIGH;
+ }
+
+ return MODE_OK;
+}
+
+static const struct drm_connector_funcs zynqmp_dp_connector_funcs = {
+ .detect = zynqmp_dp_connector_detect,
+ .fill_modes = drm_helper_probe_single_connector_modes,
+ .destroy = drm_connector_cleanup,
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
+ .reset = drm_atomic_helper_connector_reset,
+};
+
+static const struct drm_connector_helper_funcs
+zynqmp_dp_connector_helper_funcs = {
+ .get_modes = zynqmp_dp_connector_get_modes,
+ .best_encoder = zynqmp_dp_connector_best_encoder,
+ .mode_valid = zynqmp_dp_connector_mode_valid,
+};
+
+/* -----------------------------------------------------------------------------
+ * DRM Encoder
+ */
+
+static void zynqmp_dp_encoder_enable(struct drm_encoder *encoder)
+{
+ struct zynqmp_dp *dp = encoder_to_dp(encoder);
+ unsigned int i;
+ int ret = 0;
+
+ pm_runtime_get_sync(dp->dev);
+ dp->enabled = true;
+ zynqmp_dp_update_misc(dp);
+ if (zynqmp_disp_audio_enabled(dp->dpsub->disp))
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 1);
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN, 0);
+ if (dp->status == connector_status_connected) {
+ for (i = 0; i < 3; i++) {
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER,
+ DP_SET_POWER_D0);
+ if (ret == 1)
+ break;
+ usleep_range(300, 500);
+ }
+ /* Some monitors take time to wake up properly */
+ msleep(zynqmp_dp_power_on_delay_ms);
+ }
+ if (ret != 1)
+ dev_dbg(dp->dev, "DP aux failed\n");
+ else
+ zynqmp_dp_train_loop(dp);
+ zynqmp_dp_write(dp, ZYNQMP_DP_SOFTWARE_RESET,
+ ZYNQMP_DP_SOFTWARE_RESET_ALL);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_ENABLE, 1);
+}
+
+static void zynqmp_dp_encoder_disable(struct drm_encoder *encoder)
+{
+ struct zynqmp_dp *dp = encoder_to_dp(encoder);
+
+ dp->enabled = false;
+ cancel_delayed_work(&dp->hpd_work);
+ zynqmp_dp_write(dp, ZYNQMP_DP_MAIN_STREAM_ENABLE, 0);
+ drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN,
+ ZYNQMP_DP_TX_PHY_POWER_DOWN_ALL);
+ if (zynqmp_disp_audio_enabled(dp->dpsub->disp))
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_AUDIO_CONTROL, 0);
+ pm_runtime_put_sync(dp->dev);
+}
+
+static void
+zynqmp_dp_encoder_atomic_mode_set(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *connector_state)
+{
+ struct zynqmp_dp *dp = encoder_to_dp(encoder);
+ struct drm_display_mode *mode = &crtc_state->mode;
+ struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+ u8 max_lanes = dp->link_config.max_lanes;
+ u8 bpp = dp->config.bpp;
+ int rate, max_rate = dp->link_config.max_rate;
+ int ret;
+
+ zynqmp_dp_set_format(dp, ZYNQMP_DPSUB_FORMAT_RGB, 8);
+
+ /* Check again as bpp or format might have been chagned */
+ rate = zynqmp_dp_max_rate(max_rate, max_lanes, bpp);
+ if (mode->clock > rate) {
+ dev_err(dp->dev, "the mode, %s,has too high pixel rate\n",
+ mode->name);
+ drm_mode_debug_printmodeline(mode);
+ }
+
+ ret = zynqmp_dp_mode_configure(dp, adjusted_mode->clock, 0);
+ if (ret < 0)
+ return;
+
+ zynqmp_dp_encoder_mode_set_transfer_unit(dp, adjusted_mode);
+ zynqmp_dp_encoder_mode_set_stream(dp, adjusted_mode);
+}
+
+#define ZYNQMP_DP_MIN_H_BACKPORCH 20
+
+static int
+zynqmp_dp_encoder_atomic_check(struct drm_encoder *encoder,
+ struct drm_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct drm_display_mode *mode = &crtc_state->mode;
+ struct drm_display_mode *adjusted_mode = &crtc_state->adjusted_mode;
+ int diff = mode->htotal - mode->hsync_end;
+
+ /*
+ * ZynqMP DP requires horizontal backporch to be greater than 12.
+ * This limitation may not be compatible with the sink device.
+ */
+ if (diff < ZYNQMP_DP_MIN_H_BACKPORCH) {
+ int vrefresh = (adjusted_mode->clock * 1000) /
+ (adjusted_mode->vtotal * adjusted_mode->htotal);
+
+ dev_dbg(encoder->dev->dev, "hbackporch adjusted: %d to %d",
+ diff, ZYNQMP_DP_MIN_H_BACKPORCH - diff);
+ diff = ZYNQMP_DP_MIN_H_BACKPORCH - diff;
+ adjusted_mode->htotal += diff;
+ adjusted_mode->clock = adjusted_mode->vtotal *
+ adjusted_mode->htotal * vrefresh / 1000;
+ }
+
+ return 0;
+}
+
+static const struct drm_encoder_helper_funcs zynqmp_dp_encoder_helper_funcs = {
+ .enable = zynqmp_dp_encoder_enable,
+ .disable = zynqmp_dp_encoder_disable,
+ .atomic_mode_set = zynqmp_dp_encoder_atomic_mode_set,
+ .atomic_check = zynqmp_dp_encoder_atomic_check,
+};
+
+/* -----------------------------------------------------------------------------
+ * Interrupt Handling
+ */
+
+/**
+ * zynqmp_dp_enable_vblank - Enable vblank
+ * @dp: DisplayPort IP core structure
+ *
+ * Enable vblank interrupt
+ */
+void zynqmp_dp_enable_vblank(struct zynqmp_dp *dp)
+{
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_EN, ZYNQMP_DP_INT_VBLANK_START);
+}
+
+/**
+ * zynqmp_dp_disable_vblank - Disable vblank
+ * @dp: DisplayPort IP core structure
+ *
+ * Disable vblank interrupt
+ */
+void zynqmp_dp_disable_vblank(struct zynqmp_dp *dp)
+{
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_DS, ZYNQMP_DP_INT_VBLANK_START);
+}
+
+static void zynqmp_dp_hpd_work_func(struct work_struct *work)
+{
+ struct zynqmp_dp *dp;
+
+ dp = container_of(work, struct zynqmp_dp, hpd_work.work);
+
+ if (dp->drm)
+ drm_helper_hpd_irq_event(dp->drm);
+}
+
+static irqreturn_t zynqmp_dp_irq_handler(int irq, void *data)
+{
+ struct zynqmp_dp *dp = (struct zynqmp_dp *)data;
+ u32 status, mask;
+
+ status = zynqmp_dp_read(dp, ZYNQMP_DP_INT_STATUS);
+ mask = zynqmp_dp_read(dp, ZYNQMP_DP_INT_MASK);
+ if (!(status & ~mask))
+ return IRQ_NONE;
+
+ /* dbg for diagnostic, but not much that the driver can do */
+ if (status & ZYNQMP_DP_INT_CHBUF_UNDERFLW_MASK)
+ dev_dbg_ratelimited(dp->dev, "underflow interrupt\n");
+ if (status & ZYNQMP_DP_INT_CHBUF_OVERFLW_MASK)
+ dev_dbg_ratelimited(dp->dev, "overflow interrupt\n");
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_STATUS, status);
+
+ if (status & ZYNQMP_DP_INT_VBLANK_START)
+ zynqmp_disp_handle_vblank(dp->dpsub->disp);
+
+ if (status & ZYNQMP_DP_INT_HPD_EVENT)
+ schedule_delayed_work(&dp->hpd_work, 0);
+
+ if (status & ZYNQMP_DP_INT_HPD_IRQ) {
+ int ret;
+ u8 status[DP_LINK_STATUS_SIZE + 2];
+
+ ret = drm_dp_dpcd_read(&dp->aux, DP_SINK_COUNT, status,
+ DP_LINK_STATUS_SIZE + 2);
+ if (ret < 0)
+ goto handled;
+
+ if (status[4] & DP_LINK_STATUS_UPDATED ||
+ !drm_dp_clock_recovery_ok(&status[2], dp->mode.lane_cnt) ||
+ !drm_dp_channel_eq_ok(&status[2], dp->mode.lane_cnt)) {
+ zynqmp_dp_train_loop(dp);
+ }
+ }
+
+handled:
+ return IRQ_HANDLED;
+}
+
+/* -----------------------------------------------------------------------------
+ * Initialization & Cleanup
+ */
+
+int zynqmp_dp_drm_init(struct zynqmp_dpsub *dpsub)
+{
+ struct zynqmp_dp *dp = dpsub->dp;
+ struct drm_encoder *encoder = &dp->encoder;
+ struct drm_connector *connector = &dp->connector;
+ int ret;
+
+ dp->config.misc0 &= ~ZYNQMP_DP_MAIN_STREAM_MISC0_SYNC_LOCK;
+ zynqmp_dp_set_format(dp, ZYNQMP_DPSUB_FORMAT_RGB, 8);
+
+ /* Create the DRM encoder and connector. */
+ encoder->possible_crtcs |= zynqmp_disp_get_crtc_mask(dpsub->disp);
+ drm_simple_encoder_init(dp->drm, encoder, DRM_MODE_ENCODER_TMDS);
+ drm_encoder_helper_add(encoder, &zynqmp_dp_encoder_helper_funcs);
+
+ connector->polled = DRM_CONNECTOR_POLL_HPD;
+ ret = drm_connector_init(encoder->dev, connector,
+ &zynqmp_dp_connector_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort);
+ if (ret) {
+ dev_err(dp->dev, "failed to create the DRM connector\n");
+ return ret;
+ }
+
+ drm_connector_helper_add(connector, &zynqmp_dp_connector_helper_funcs);
+ drm_connector_register(connector);
+ drm_connector_attach_encoder(connector, encoder);
+
+ /* Initialize and register the AUX adapter. */
+ ret = zynqmp_dp_aux_init(dp);
+ if (ret) {
+ dev_err(dp->dev, "failed to initialize DP aux\n");
+ return ret;
+ }
+
+ /* Now that initialisation is complete, enable interrupts. */
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_EN, ZYNQMP_DP_INT_ALL);
+
+ return 0;
+}
+
+int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm)
+{
+ struct platform_device *pdev = to_platform_device(dpsub->dev);
+ struct zynqmp_dp *dp;
+ struct resource *res;
+ int ret;
+
+ dp = drmm_kzalloc(drm, sizeof(*dp), GFP_KERNEL);
+ if (!dp)
+ return -ENOMEM;
+
+ dp->dev = &pdev->dev;
+ dp->dpsub = dpsub;
+ dp->status = connector_status_disconnected;
+ dp->drm = drm;
+
+ INIT_DELAYED_WORK(&dp->hpd_work, zynqmp_dp_hpd_work_func);
+
+ dpsub->dp = dp;
+
+ /* Acquire all resources (IOMEM, IRQ and PHYs). */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dp");
+ dp->iomem = devm_ioremap_resource(dp->dev, res);
+ if (IS_ERR(dp->iomem))
+ return PTR_ERR(dp->iomem);
+
+ dp->irq = platform_get_irq(pdev, 0);
+ if (dp->irq < 0)
+ return dp->irq;
+
+ dp->reset = devm_reset_control_get(dp->dev, NULL);
+ if (IS_ERR(dp->reset)) {
+ if (PTR_ERR(dp->reset) != -EPROBE_DEFER)
+ dev_err(dp->dev, "failed to get reset: %ld\n",
+ PTR_ERR(dp->reset));
+ return PTR_ERR(dp->reset);
+ }
+
+ ret = zynqmp_dp_phy_probe(dp);
+ if (ret)
+ return ret;
+
+ /* Initialize the hardware. */
+ zynqmp_dp_write(dp, ZYNQMP_DP_TX_PHY_POWER_DOWN,
+ ZYNQMP_DP_TX_PHY_POWER_DOWN_ALL);
+ zynqmp_dp_set(dp, ZYNQMP_DP_PHY_RESET, ZYNQMP_DP_PHY_RESET_ALL_RESET);
+ zynqmp_dp_write(dp, ZYNQMP_DP_FORCE_SCRAMBLER_RESET, 1);
+ zynqmp_dp_write(dp, ZYNQMP_DP_TRANSMITTER_ENABLE, 0);
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_DS, 0xffffffff);
+
+ ret = zynqmp_dp_phy_init(dp);
+ if (ret)
+ return ret;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_TRANSMITTER_ENABLE, 1);
+
+ /*
+ * Now that the hardware is initialized and won't generate spurious
+ * interrupts, request the IRQ.
+ */
+ ret = devm_request_threaded_irq(dp->dev, dp->irq, NULL,
+ zynqmp_dp_irq_handler, IRQF_ONESHOT,
+ dev_name(dp->dev), dp);
+ if (ret < 0)
+ goto error;
+
+ dev_dbg(dp->dev, "ZynqMP DisplayPort Tx probed with %u lanes\n",
+ dp->num_lanes);
+
+ return 0;
+
+error:
+ zynqmp_dp_phy_exit(dp);
+ return ret;
+}
+
+void zynqmp_dp_remove(struct zynqmp_dpsub *dpsub)
+{
+ struct zynqmp_dp *dp = dpsub->dp;
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_DS, ZYNQMP_DP_INT_ALL);
+ disable_irq(dp->irq);
+
+ cancel_delayed_work_sync(&dp->hpd_work);
+ zynqmp_dp_aux_cleanup(dp);
+
+ zynqmp_dp_write(dp, ZYNQMP_DP_TRANSMITTER_ENABLE, 0);
+ zynqmp_dp_write(dp, ZYNQMP_DP_INT_DS, 0xffffffff);
+
+ zynqmp_dp_phy_exit(dp);
+}
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.h b/drivers/gpu/drm/xlnx/zynqmp_dp.h
new file mode 100644
index 0000000000000000000000000000000000000000..4507740093f6c8c70995554712964083899d2276
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ZynqMP DisplayPort Driver
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#ifndef _ZYNQMP_DP_H_
+#define _ZYNQMP_DP_H_
+
+struct drm_device;
+struct platform_device;
+struct zynqmp_dp;
+struct zynqmp_dpsub;
+
+void zynqmp_dp_enable_vblank(struct zynqmp_dp *dp);
+void zynqmp_dp_disable_vblank(struct zynqmp_dp *dp);
+
+int zynqmp_dp_drm_init(struct zynqmp_dpsub *dpsub);
+int zynqmp_dp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm);
+void zynqmp_dp_remove(struct zynqmp_dpsub *dpsub);
+
+#endif /* _ZYNQMP_DP_H_ */
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.c b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
new file mode 100644
index 0000000000000000000000000000000000000000..26328c76305be1796cc496940b8a39237a037bd5
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.c
@@ -0,0 +1,322 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP DisplayPort Subsystem Driver
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/module.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_device.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_managed.h>
+#include <drm/drm_mode_config.h>
+#include <drm/drm_probe_helper.h>
+#include <drm/drm_vblank.h>
+
+#include "zynqmp_disp.h"
+#include "zynqmp_dp.h"
+#include "zynqmp_dpsub.h"
+
+/* -----------------------------------------------------------------------------
+ * Dumb Buffer & Framebuffer Allocation
+ */
+
+static int zynqmp_dpsub_dumb_create(struct drm_file *file_priv,
+ struct drm_device *drm,
+ struct drm_mode_create_dumb *args)
+{
+ struct zynqmp_dpsub *dpsub = to_zynqmp_dpsub(drm);
+ unsigned int pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
+
+ /* Enforce the alignment constraints of the DMA engine. */
+ args->pitch = ALIGN(pitch, dpsub->dma_align);
+
+ return drm_gem_cma_dumb_create_internal(file_priv, drm, args);
+}
+
+static struct drm_framebuffer *
+zynqmp_dpsub_fb_create(struct drm_device *drm, struct drm_file *file_priv,
+ const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ struct zynqmp_dpsub *dpsub = to_zynqmp_dpsub(drm);
+ struct drm_mode_fb_cmd2 cmd = *mode_cmd;
+ unsigned int i;
+
+ /* Enforce the alignment constraints of the DMA engine. */
+ for (i = 0; i < ARRAY_SIZE(cmd.pitches); ++i)
+ cmd.pitches[i] = ALIGN(cmd.pitches[i], dpsub->dma_align);
+
+ return drm_gem_fb_create(drm, file_priv, &cmd);
+}
+
+static const struct drm_mode_config_funcs zynqmp_dpsub_mode_config_funcs = {
+ .fb_create = zynqmp_dpsub_fb_create,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+/* -----------------------------------------------------------------------------
+ * DRM/KMS Driver
+ */
+
+DEFINE_DRM_GEM_CMA_FOPS(zynqmp_dpsub_drm_fops);
+
+static struct drm_driver zynqmp_dpsub_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_GEM |
+ DRIVER_ATOMIC,
+
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+ .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+ .gem_prime_vmap = drm_gem_cma_prime_vmap,
+ .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
+ .gem_prime_mmap = drm_gem_cma_prime_mmap,
+ .gem_free_object_unlocked = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+ .dumb_create = zynqmp_dpsub_dumb_create,
+ .dumb_destroy = drm_gem_dumb_destroy,
+
+ .fops = &zynqmp_dpsub_drm_fops,
+
+ .name = "zynqmp-dpsub",
+ .desc = "Xilinx DisplayPort Subsystem Driver",
+ .date = "20130509",
+ .major = 1,
+ .minor = 0,
+};
+
+static int zynqmp_dpsub_drm_init(struct zynqmp_dpsub *dpsub)
+{
+ struct drm_device *drm = &dpsub->drm;
+ int ret;
+
+ /* Initialize mode config, vblank and the KMS poll helper. */
+ ret = drmm_mode_config_init(drm);
+ if (ret < 0)
+ goto err_dev_put;
+
+ drm->mode_config.funcs = &zynqmp_dpsub_mode_config_funcs;
+ drm->mode_config.min_width = 0;
+ drm->mode_config.min_height = 0;
+ drm->mode_config.max_width = ZYNQMP_DISP_MAX_WIDTH;
+ drm->mode_config.max_height = ZYNQMP_DISP_MAX_HEIGHT;
+
+ ret = drm_vblank_init(drm, 1);
+ if (ret)
+ goto err_dev_put;
+
+ drm->irq_enabled = 1;
+
+ drm_kms_helper_poll_init(drm);
+
+ /*
+ * Initialize the DISP and DP components. This will creates planes,
+ * CRTC, encoder and connector. The DISP should be initialized first as
+ * the DP encoder needs the CRTC.
+ */
+ ret = zynqmp_disp_drm_init(dpsub);
+ if (ret)
+ goto err_poll_fini;
+
+ ret = zynqmp_dp_drm_init(dpsub);
+ if (ret)
+ goto err_poll_fini;
+
+ /* Reset all components and register the DRM device. */
+ drm_mode_config_reset(drm);
+
+ ret = drm_dev_register(drm, 0);
+ if (ret < 0)
+ goto err_poll_fini;
+
+ /* Initialize fbdev generic emulation. */
+ drm_fbdev_generic_setup(drm, 24);
+
+ return 0;
+
+err_poll_fini:
+ drm_kms_helper_poll_fini(drm);
+err_dev_put:
+ drm_dev_put(drm);
+ return ret;
+}
+
+/* -----------------------------------------------------------------------------
+ * Power Management
+ */
+
+static int __maybe_unused zynqmp_dpsub_suspend(struct device *dev)
+{
+ struct zynqmp_dpsub *dpsub = dev_get_drvdata(dev);
+
+ return drm_mode_config_helper_suspend(&dpsub->drm);
+}
+
+static int __maybe_unused zynqmp_dpsub_resume(struct device *dev)
+{
+ struct zynqmp_dpsub *dpsub = dev_get_drvdata(dev);
+
+ return drm_mode_config_helper_resume(&dpsub->drm);
+}
+
+static const struct dev_pm_ops zynqmp_dpsub_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(zynqmp_dpsub_suspend, zynqmp_dpsub_resume)
+};
+
+/* -----------------------------------------------------------------------------
+ * Probe & Remove
+ */
+
+static int zynqmp_dpsub_init_clocks(struct zynqmp_dpsub *dpsub)
+{
+ int ret;
+
+ dpsub->apb_clk = devm_clk_get(dpsub->dev, "dp_apb_clk");
+ if (IS_ERR(dpsub->apb_clk))
+ return PTR_ERR(dpsub->apb_clk);
+
+ ret = clk_prepare_enable(dpsub->apb_clk);
+ if (ret) {
+ dev_err(dpsub->dev, "failed to enable the APB clock\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int zynqmp_dpsub_probe(struct platform_device *pdev)
+{
+ struct zynqmp_dpsub *dpsub;
+ int ret;
+
+ /* Allocate private data. */
+ dpsub = kzalloc(sizeof(*dpsub), GFP_KERNEL);
+ if (!dpsub)
+ return -ENOMEM;
+
+ dpsub->dev = &pdev->dev;
+ platform_set_drvdata(pdev, dpsub);
+
+ dma_set_mask(dpsub->dev, DMA_BIT_MASK(ZYNQMP_DISP_MAX_DMA_BIT));
+
+ /*
+ * Initialize the DRM device early, as the DRM core mandates usage of
+ * the managed memory helpers tied to the DRM device.
+ */
+ ret = drm_dev_init(&dpsub->drm, &zynqmp_dpsub_drm_driver, &pdev->dev);
+ if (ret < 0) {
+ kfree(dpsub);
+ return ret;
+ }
+
+ drmm_add_final_kfree(&dpsub->drm, dpsub);
+
+ /* Try the reserved memory. Proceed if there's none. */
+ of_reserved_mem_device_init(&pdev->dev);
+
+ ret = zynqmp_dpsub_init_clocks(dpsub);
+ if (ret < 0)
+ goto err_mem;
+
+ pm_runtime_enable(&pdev->dev);
+
+ /*
+ * DP should be probed first so that the zynqmp_disp can set the output
+ * format accordingly.
+ */
+ ret = zynqmp_dp_probe(dpsub, &dpsub->drm);
+ if (ret)
+ goto err_pm;
+
+ ret = zynqmp_disp_probe(dpsub, &dpsub->drm);
+ if (ret)
+ goto err_dp;
+
+ ret = zynqmp_dpsub_drm_init(dpsub);
+ if (ret)
+ goto err_disp;
+
+ dev_info(&pdev->dev, "ZynqMP DisplayPort Subsystem driver probed");
+
+ return 0;
+
+err_disp:
+ zynqmp_disp_remove(dpsub);
+err_dp:
+ zynqmp_dp_remove(dpsub);
+err_pm:
+ pm_runtime_disable(&pdev->dev);
+ clk_disable_unprepare(dpsub->apb_clk);
+err_mem:
+ of_reserved_mem_device_release(&pdev->dev);
+ return ret;
+}
+
+static int zynqmp_dpsub_remove(struct platform_device *pdev)
+{
+ struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev);
+ struct drm_device *drm = &dpsub->drm;
+
+ drm_dev_unregister(drm);
+ drm_atomic_helper_shutdown(drm);
+ drm_kms_helper_poll_fini(drm);
+
+ zynqmp_disp_remove(dpsub);
+ zynqmp_dp_remove(dpsub);
+
+ pm_runtime_disable(&pdev->dev);
+ clk_disable_unprepare(dpsub->apb_clk);
+ of_reserved_mem_device_release(&pdev->dev);
+
+ drm_dev_put(drm);
+
+ return 0;
+}
+
+static void zynqmp_dpsub_shutdown(struct platform_device *pdev)
+{
+ struct zynqmp_dpsub *dpsub = platform_get_drvdata(pdev);
+
+ drm_atomic_helper_shutdown(&dpsub->drm);
+}
+
+static const struct of_device_id zynqmp_dpsub_of_match[] = {
+ { .compatible = "xlnx,zynqmp-dpsub-1.7", },
+ { /* end of table */ },
+};
+MODULE_DEVICE_TABLE(of, zynqmp_dpsub_of_match);
+
+static struct platform_driver zynqmp_dpsub_driver = {
+ .probe = zynqmp_dpsub_probe,
+ .remove = zynqmp_dpsub_remove,
+ .shutdown = zynqmp_dpsub_shutdown,
+ .driver = {
+ .name = "zynqmp-dpsub",
+ .pm = &zynqmp_dpsub_pm_ops,
+ .of_match_table = zynqmp_dpsub_of_match,
+ },
+};
+
+module_platform_driver(zynqmp_dpsub_driver);
+
+MODULE_AUTHOR("Xilinx, Inc.");
+MODULE_DESCRIPTION("ZynqMP DP Subsystem Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dpsub.h b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h
new file mode 100644
index 0000000000000000000000000000000000000000..c04026d82639cc3dac71a068cb2e13dd2b7aa79e
--- /dev/null
+++ b/drivers/gpu/drm/xlnx/zynqmp_dpsub.h
@@ -0,0 +1,54 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * ZynqMP DPSUB Subsystem Driver
+ *
+ * Copyright (C) 2017 - 2020 Xilinx, Inc.
+ *
+ * Authors:
+ * - Hyun Woo Kwon <hyun.kwon@xilinx.com>
+ * - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ */
+
+#ifndef _ZYNQMP_DPSUB_H_
+#define _ZYNQMP_DPSUB_H_
+
+struct clk;
+struct device;
+struct drm_device;
+struct zynqmp_disp;
+struct zynqmp_dp;
+
+enum zynqmp_dpsub_format {
+ ZYNQMP_DPSUB_FORMAT_RGB,
+ ZYNQMP_DPSUB_FORMAT_YCRCB444,
+ ZYNQMP_DPSUB_FORMAT_YCRCB422,
+ ZYNQMP_DPSUB_FORMAT_YONLY,
+};
+
+/**
+ * struct zynqmp_dpsub - ZynqMP DisplayPort Subsystem
+ * @drm: The DRM/KMS device
+ * @dev: The physical device
+ * @apb_clk: The APB clock
+ * @disp: The display controller
+ * @dp: The DisplayPort controller
+ * @dma_align: DMA alignment constraint (must be a power of 2)
+ */
+struct zynqmp_dpsub {
+ struct drm_device drm;
+ struct device *dev;
+
+ struct clk *apb_clk;
+
+ struct zynqmp_disp *disp;
+ struct zynqmp_dp *dp;
+
+ unsigned int dma_align;
+};
+
+static inline struct zynqmp_dpsub *to_zynqmp_dpsub(struct drm_device *drm)
+{
+ return container_of(drm, struct zynqmp_dpsub, drm);
+}
+
+#endif /* _ZYNQMP_DPSUB_H_ */