From 032df8793ea3c7595f0d004a06c5297c67644c21 Mon Sep 17 00:00:00 2001
From: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Date: Mon, 20 Jul 2020 17:39:03 +0200
Subject: [PATCH] WIP: Magic for the S922
---
drivers/gpu/drm/panfrost/panfrost_gpu.c | 7 +++++++
drivers/gpu/drm/panfrost/panfrost_regs.h | 3 +++
2 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index e0f190e438139..1c20a9c72f2d2 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -62,6 +62,13 @@ int panfrost_gpu_soft_reset(struct panfrost_device *pfdev)
gpu_write(pfdev, GPU_INT_CLEAR, GPU_IRQ_RESET_COMPLETED);
gpu_write(pfdev, GPU_CMD, GPU_CMD_SOFT_RESET);
+ if (of_device_is_compatible(pfdev->dev->of_node, "amlogic,meson-gxm-mali") ||
+ of_device_is_compatible(pfdev->dev->of_node, "amlogic,meson-g12a-mali")) {
+ /* Override Power Management Settings for Amlogic Meson SoCs */
+ gpu_write(pfdev, GPU_PWR_KEY, 0x2968A819);
+ gpu_write(pfdev, GPU_PWR_OVERRIDE1, 0xfff | (0x20 << 16));
+ }
+
ret = readl_relaxed_poll_timeout(pfdev->iomem + GPU_INT_RAWSTAT,
val, val & GPU_IRQ_RESET_COMPLETED, 100, 10000);
diff --git a/drivers/gpu/drm/panfrost/panfrost_regs.h b/drivers/gpu/drm/panfrost/panfrost_regs.h
index ea38ac60581c6..4e8c3a2d0625b 100644
--- a/drivers/gpu/drm/panfrost/panfrost_regs.h
+++ b/drivers/gpu/drm/panfrost/panfrost_regs.h
@@ -51,6 +51,9 @@
#define GPU_STATUS 0x34
#define GPU_STATUS_PRFCNT_ACTIVE BIT(2)
#define GPU_LATEST_FLUSH_ID 0x38
+#define GPU_PWR_KEY 0x050 /* (WO) Power manager key register */
+#define GPU_PWR_OVERRIDE0 0x054 /* (RW) Power manager override settings */
+#define GPU_PWR_OVERRIDE1 0x058 /* (RW) Power manager override settings */
#define GPU_FAULT_STATUS 0x3C
#define GPU_FAULT_ADDRESS_LO 0x40
#define GPU_FAULT_ADDRESS_HI 0x44
--
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