From: Adam Skladowski <a39.skl@xxxxxxxxx>
[ 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@xxxxxxxxxx>
Fixes: e20c9284c8f2 ("drm/msm/adreno: Add support for Adreno 510 GPU")
Signed-off-by: Adam Skladowski <a39.skl@xxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Patchwork: https://patchwork.freedesktop.org/patch/526898/
Link: https://lore.kernel.org/r/20230314221757.13096-1-a39.skl@xxxxxxxxx
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index b8c49ba65254c..d92416d526286 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1749,6 +1749,7 @@ 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) {
@@ -1769,7 +1770,12 @@ 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);
--
2.39.2
