[PATCH] drm/msm/a6xx: set ubwc config for A640 and A650

From: Jonathan Marek <jonathan@marek.ca>
To: freedreno@lists.freedesktop.org
Cc: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Jordan Crouse <jcrouse@codeaurora.org>,
	Sharat Masetty <smasetty@codeaurora.org>,
	Akhil P Oommen <akhilpo@codeaurora.org>,
	linux-arm-msm@vger.kernel.org (open list:DRM DRIVER FOR MSM
	ADRENO GPU),
	dri-devel@lists.freedesktop.org (open list:DRM DRIVER FOR MSM
	ADRENO GPU), linux-kernel@vger.kernel.org (open list)
Subject: [PATCH] drm/msm/a6xx: set ubwc config for A640 and A650
Date: Mon, 25 May 2020 23:25:13 -0400	[thread overview]
Message-ID: <20200526032514.22198-1-jonathan@marek.ca> (raw)

This is required for A640 and A650 to be able to share UBWC-compressed
images with other HW such as display, which expect this configuration.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 38 ++++++++++++++++++++++-----
 1 file changed, 32 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 6f335ae179c8..aa004a261277 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -289,6 +289,37 @@ static void a6xx_set_hwcg(struct msm_gpu *gpu, bool state)
 	gpu_write(gpu, REG_A6XX_RBBM_CLOCK_CNTL, state ? 0x8aa8aa02 : 0);
 }
 
+static void a6xx_set_ubwc_config(struct msm_gpu *gpu)
+{
+	struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
+	u32 lower_bit = 2;
+	u32 amsbc = 0;
+	u32 rgb565_predicator = 0;
+	u32 uavflagprd_inv = 0;
+
+	/* a618 is using the hw default values */
+	if (adreno_is_a618(adreno_gpu))
+		return;
+
+	if (adreno_is_a640(adreno_gpu))
+		amsbc = 1;
+
+	if (adreno_is_a650(adreno_gpu)) {
+		/* TODO: get ddr type from bootloader and use 2 for LPDDR4 */
+		lower_bit = 3;
+		amsbc = 1;
+		rgb565_predicator = 1;
+		uavflagprd_inv = 2;
+	}
+
+	gpu_write(gpu, REG_A6XX_RB_NC_MODE_CNTL,
+		rgb565_predicator << 11 | amsbc << 4 | lower_bit << 1);
+	gpu_write(gpu, REG_A6XX_TPL1_NC_MODE_CNTL, lower_bit << 1);
+	gpu_write(gpu, REG_A6XX_SP_NC_MODE_CNTL,
+		uavflagprd_inv >> 4 | lower_bit << 1);
+	gpu_write(gpu, REG_A6XX_UCHE_MODE_CNTL, lower_bit << 21);
+}
+
 static int a6xx_cp_init(struct msm_gpu *gpu)
 {
 	struct msm_ringbuffer *ring = gpu->rb[0];
@@ -478,12 +509,7 @@ static int a6xx_hw_init(struct msm_gpu *gpu)
 	/* Select CP0 to always count cycles */
 	gpu_write(gpu, REG_A6XX_CP_PERFCTR_CP_SEL_0, PERF_CP_ALWAYS_COUNT);
 
-	if (adreno_is_a630(adreno_gpu)) {
-		gpu_write(gpu, REG_A6XX_RB_NC_MODE_CNTL, 2 << 1);
-		gpu_write(gpu, REG_A6XX_TPL1_NC_MODE_CNTL, 2 << 1);
-		gpu_write(gpu, REG_A6XX_SP_NC_MODE_CNTL, 2 << 1);
-		gpu_write(gpu, REG_A6XX_UCHE_MODE_CNTL, 2 << 21);
-	}
+	a6xx_set_ubwc_config(gpu);
 
 	/* Enable fault detection */
 	gpu_write(gpu, REG_A6XX_RBBM_INTERFACE_HANG_INT_CNTL,
-- 
2.26.1

