From dadd28d4142f9ad39eefb7b45ee7518bd4d2459c Mon Sep 17 00:00:00 2001
From: Thomas Zimmermann <tzimmermann@suse.de>
Date: Mon, 14 Oct 2024 10:55:26 +0200
Subject: [PATCH] drm/client: Add client-lib module
Add drm_client_lib.ko to contain DRM's built-in client. Move the
existing client for fbdev emulation into the new module. Protect the
new module behind CONFIG_DRM_CLIENT_LIB.
The Kconfig rules separate the DRM drivers from the DRM clients. A
driver can opt into the default clients, but the user configures
each client individually. To do so, DRM drivers still select
DRM_CLIENT_SELECTION. The option is now a tristate that further
selects all dependencies of the enabled DRM clients. There's
a menu option for each client. Enabling at least one client also
selects DRM_CLIENT_SETUP, so that drivers call drm_client_setup().
New DRM clients should depend on DRM_CLIENT_SELECTION.
There are existing kernel options in drm_fb_helper.o, so leave this
file in the KMS-helper module for now.
v5:
- leave fbdev helpers in drm_kms_helper.ko for now
v3:
- fix commit changelog
v2:
- keep client code in core
- protect lib with DRM_CLIENT_LIB
- remove duplicate line from Makefile (Jocelyn)
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241014085740.582287-13-tzimmermann@suse.de
---
drivers/gpu/drm/Kconfig | 26 +++++++++++++++++++++-----
drivers/gpu/drm/Makefile | 14 +++++++++-----
drivers/gpu/drm/drm_client_setup.c | 3 +++
3 files changed, 33 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 5cbb0b2a4c180..5504721007cc1 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -9,8 +9,6 @@ menuconfig DRM
tristate "Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)"
depends on (AGP || AGP=n) && !EMULATED_CMPXCHG && HAS_DMA
select DRM_PANEL_ORIENTATION_QUIRKS
- select DRM_KMS_HELPER if DRM_FBDEV_EMULATION
- select FB_CORE if DRM_FBDEV_EMULATION
select HDMI
select I2C
select DMA_SHARED_BUFFER
@@ -219,10 +217,19 @@ config DRM_CLIENT
option. Drivers that support the default clients should
select DRM_CLIENT_SELECTION instead.
+config DRM_CLIENT_LIB
+ tristate
+ depends on DRM
+ select DRM_KMS_HELPER if DRM_FBDEV_EMULATION
+ select FB_CORE if DRM_FBDEV_EMULATION
+ help
+ This option enables the DRM client library and selects all
+ modules and components according to the enabled clients.
+
config DRM_CLIENT_SELECTION
- bool
+ tristate
depends on DRM
- select DRM_CLIENT_SETUP if DRM_FBDEV_EMULATION
+ select DRM_CLIENT_LIB if DRM_FBDEV_EMULATION
help
Drivers that support in-kernel DRM clients have to select this
option.
@@ -230,11 +237,18 @@ config DRM_CLIENT_SELECTION
config DRM_CLIENT_SETUP
bool
depends on DRM_CLIENT_SELECTION
+ help
+ Enables the DRM client selection. DRM drivers that support the
+ default clients should select DRM_CLIENT_SELECTION instead.
+
+menu "Supported DRM clients"
+ depends on DRM_CLIENT_SELECTION
config DRM_FBDEV_EMULATION
bool "Enable legacy fbdev support for your modesetting driver"
- depends on DRM
+ depends on DRM_CLIENT_SELECTION
select DRM_CLIENT
+ select DRM_CLIENT_SETUP
select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
default FB
help
@@ -273,6 +287,8 @@ config DRM_FBDEV_LEAK_PHYS_SMEM
If in doubt, say "N" or spread the word to your closed source
library vendor.
+endmenu
+
config DRM_LOAD_EDID_FIRMWARE
bool "Allow to specify an EDID data set instead of probing for it"
depends on DRM
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index fcb447cafe419..463afad1b5ca6 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -144,14 +144,18 @@ drm_kms_helper-y := \
drm_probe_helper.o \
drm_self_refresh_helper.o \
drm_simple_kms_helper.o
-drm_kms_helper-$(CONFIG_DRM_CLIENT_SETUP) += \
- drm_client_setup.o
drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o
-drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += \
- drm_fbdev_client.o \
- drm_fb_helper.o
+drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o
obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o
+#
+# DRM clients
+#
+
+drm_client_lib-y := drm_client_setup.o
+drm_client_lib-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fbdev_client.o
+obj-$(CONFIG_DRM_CLIENT_LIB) += drm_client_lib.o
+
#
# Drivers and the rest
#
diff --git a/drivers/gpu/drm/drm_client_setup.c b/drivers/gpu/drm/drm_client_setup.c
index 5969c4ffe31ba..c14221ca5a0d8 100644
--- a/drivers/gpu/drm/drm_client_setup.c
+++ b/drivers/gpu/drm/drm_client_setup.c
@@ -64,3 +64,6 @@ void drm_client_setup_with_color_mode(struct drm_device *dev, unsigned int color
drm_client_setup_with_fourcc(dev, fourcc);
}
EXPORT_SYMBOL(drm_client_setup_with_color_mode);
+
+MODULE_DESCRIPTION("In-kernel DRM clients");
+MODULE_LICENSE("GPL and additional rights");
--
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