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drm/msm/adreno: Check for recognized GPU before bind

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If we have a newer dtb than kernel, we could end up in a situation where
the GPU device is present in the dtb, but not in the drivers device
table.  We don't want this to prevent the display from probing.  So
check that we recognize the GPU before adding the GPU component.

v2: use %pOF

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/657701/
This commit is contained in:
Rob Clark 2025-06-09 11:24:37 -07:00
parent 1efb73791c
commit 0838fc3e67
3 changed files with 26 additions and 6 deletions
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29
drivers/gpu/drm/msm/adreno/adreno_device.c
View file

@ -182,6 +182,26 @@ static int find_chipid(struct device_node *node, uint32_t *chipid)
return 0;
}
bool adreno_has_gpu(struct device_node *node)
{
const struct adreno_info *info;
uint32_t chip_id;
int ret;
ret = find_chipid(node, &chip_id);
if (ret)
return false;
info = adreno_info(chip_id);
if (!info) {
pr_warn("%pOF: Unknown GPU revision: %"ADRENO_CHIPID_FMT"\n",
node, ADRENO_CHIPID_ARGS(chip_id));
return false;
}
return true;
}
static int adreno_bind(struct device *dev, struct device *master, void *data)
{
static struct adreno_platform_config config = {};
@ -192,18 +212,17 @@ static int adreno_bind(struct device *dev, struct device *master, void *data)
int ret;
ret = find_chipid(dev->of_node, &config.chip_id);
if (ret)
/* We shouldn't have gotten this far if we can't parse the chip_id */
if (WARN_ON(ret))
return ret;
dev->platform_data = &config;
priv->gpu_pdev = to_platform_device(dev);
info = adreno_info(config.chip_id);
if (!info) {
dev_warn(drm->dev, "Unknown GPU revision: %"ADRENO_CHIPID_FMT"\n",
ADRENO_CHIPID_ARGS(config.chip_id));
/* We shouldn't have gotten this far if we don't recognize the GPU: */
if (!WARN_ON(info))
return -ENXIO;
}
config.info = info;

2
drivers/gpu/drm/msm/msm_drv.c
View file

@ -1034,7 +1034,7 @@ static int add_gpu_components(struct device *dev,
if (!np)
return 0;
if (of_device_is_available(np))
if (of_device_is_available(np) && adreno_has_gpu(np))
drm_of_component_match_add(dev, matchptr, component_compare_of, np);
of_node_put(np);

1
drivers/gpu/drm/msm/msm_gpu.h
View file

@ -662,6 +662,7 @@ msm_gpu_create_private_address_space(struct msm_gpu *gpu, struct task_struct *ta
void msm_gpu_cleanup(struct msm_gpu *gpu);
struct msm_gpu *adreno_load_gpu(struct drm_device *dev);
bool adreno_has_gpu(struct device_node *node);
void __init adreno_register(void);
void __exit adreno_unregister(void);