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| author | Huacai Chen <chenhuacai@loongson.cn> | 2024-01-24 13:16:07 +0300 |
|---|---|---|
| committer | Sui Jingfeng <sui.jingfeng@linux.dev> | 2024-01-28 14:06:46 +0300 |
| commit | cc575083cdcf8127f5e260915f5af443602a7763 (patch) | |
| tree | 68e73ddfec7f4b893aba19ff5cc0748447119d0b /drivers/gpu/drm/loongson | |
| parent | 71ce046327cfd3aef3f93d1c44e091395eb03f8f (diff) | |
| download | linux-cc575083cdcf8127f5e260915f5af443602a7763.tar.xz | |
drm/loongson: Error out if no VRAM detected
When a Loongson laptop is equipped with a Radeon GPU, it can be true that
there is no dedicated VRAM soldered on the motherboard. This is probably
for cost reason, but drm/loongson driver is probed because the platform
BIOS (either UEFI or PMON) forget to disable the integrated GPU.
So in the lsdc_get_dedicated_vram() function, we error out if no dedicated
VRAM detected. This fix nothing, but serve as a sanity check only.
Tested-by: Xiaotian Wu <wuxiaotian@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/20240124101607.2910998-1-chenhuacai@loongson.cn
Diffstat (limited to 'drivers/gpu/drm/loongson')
| -rw-r--r-- | drivers/gpu/drm/loongson/lsdc_drv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/loongson/lsdc_drv.c b/drivers/gpu/drm/loongson/lsdc_drv.c index 89ccc0c43169..d8ff60b46abe 100644 --- a/drivers/gpu/drm/loongson/lsdc_drv.c +++ b/drivers/gpu/drm/loongson/lsdc_drv.c @@ -184,7 +184,7 @@ static int lsdc_get_dedicated_vram(struct lsdc_device *ldev, drm_info(ddev, "Dedicated vram start: 0x%llx, size: %uMiB\n", (u64)base, (u32)(size >> 20)); - return 0; + return (size > SZ_1M) ? 0 : -ENODEV; } static struct lsdc_device * |