[PATCH 5.10 087/717] drm/msm/a5xx: Clear shadow on suspend

Greg Kroah-Hartman
2020-12-28T15:18:57Z

From: Rob Clark <robdclark@chromium.org>

[ Upstream commit 5771de5d5b3bfaf279e5c262a113d4b6fbe54355 ]

Similar to the previous patch, clear shadow on suspend to avoid timeouts
waiting for ringbuffer space.

Fixes: 8907afb476ac ("drm/msm: Allow a5xx to mark the RPTR shadow as privileged")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index d6804a8023555..8aa08976aad17 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1207,7 +1207,9 @@ static int a5xx_pm_resume(struct msm_gpu *gpu)
static int a5xx_pm_suspend(struct msm_gpu *gpu)
{
struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
+ struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
u32 mask = 0xf;
+ int i, ret;

/* A510 has 3 XIN ports in VBIF */
if (adreno_is_a510(adreno_gpu))
@@ -1227,7 +1229,15 @@ static int a5xx_pm_suspend(struct msm_gpu *gpu)
gpu_write(gpu, REG_A5XX_RBBM_BLOCK_SW_RESET_CMD, 0x003C0000);
gpu_write(gpu, REG_A5XX_RBBM_BLOCK_SW_RESET_CMD, 0x00000000);

- return msm_gpu_pm_suspend(gpu);
+ ret = msm_gpu_pm_suspend(gpu);
+ if (ret)
+ return ret;
+
+ if (a5xx_gpu->has_whereami)
+ for (i = 0; i < gpu->nr_rings; i++)
+ a5xx_gpu->shadow[i] = 0;
+
+ return 0;
}

static int a5xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value)
--
2.27.0