[PATCH 6.4 375/800] drm/msm/a5xx: really check for A510 in a5xx_gpu_init

Greg Kroah-Hartman
2023-07-16T20:10:25Z

From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

[ Upstream commit 736a9327365644b460e4498b1ce172ca411efcbc ]

The commit 010c8bbad2cb ("drm: msm: adreno: Disable preemption on Adreno
510") added special handling for a510 (this SKU doesn't seem to support
preemption, so the driver should clamp nr_rings to 1). However the
gpu->revn is not yet set (it is set later, in adreno_gpu_init()) and
thus the condition is always false. Check config->rev instead.

Fixes: 010c8bbad2cb ("drm: msm: adreno: Disable preemption on Adreno 510")
Reported-by: Adam Skladowski <a39.skl@gmail.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Adam Skladowski <a39.skl@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/531511/
Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 1e8d2982d603c..a99310b687932 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1743,6 +1743,7 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
{
struct msm_drm_private *priv = dev->dev_private;
struct platform_device *pdev = priv->gpu_pdev;
+ struct adreno_platform_config *config = pdev->dev.platform_data;
struct a5xx_gpu *a5xx_gpu = NULL;
struct adreno_gpu *adreno_gpu;
struct msm_gpu *gpu;
@@ -1769,7 +1770,7 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)

nr_rings = 4;

- if (adreno_is_a510(adreno_gpu))
+ if (adreno_cmp_rev(ADRENO_REV(5, 1, 0, ANY_ID), config->rev))
nr_rings = 1;

ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, nr_rings);
--
2.39.2