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drm: msm: adreno: Disable preemption on Adreno 510

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[ Upstream commit 010c8bbad2cb8c33c47963e29f051f1e917e45a5 ]

Downstream driver appears to not support preemption on A510 target,
trying to use one make device slow and fill log with rings related errors.
Set num_rings to 1 to disable preemption.

Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Fixes: e20c9284c8f2 ("drm/msm/adreno: Add support for Adreno 510 GPU")
Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/526898/
Link: https://lore.kernel.org/r/20230314221757.13096-1-a39.skl@gmail.com
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Adam Skladowski 2023-03-14 23:17:17 +01:00 committed by Greg Kroah-Hartman
parent 00f02bb8cb
commit ee22417f82
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/msm/adreno/a5xx_gpu.c
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@ -1569,6 +1569,7 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
struct a5xx_gpu *a5xx_gpu = NULL;
struct adreno_gpu *adreno_gpu;
struct msm_gpu *gpu;
unsigned int nr_rings;
int ret;
if (!pdev) {
@ -1589,7 +1590,12 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
check_speed_bin(&pdev->dev);
ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 4);
nr_rings = 4;
if (adreno_is_a510(adreno_gpu))
nr_rings = 1;
ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, nr_rings);
if (ret) {
a5xx_destroy(&(a5xx_gpu->base.base));
return ERR_PTR(ret);