github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-30 01:53:29 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

drm/loongson: Error out if no VRAM detected

Browse Source 
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
This commit is contained in:
Huacai Chen 2024-01-24 18:16:07 +08:00 committed by Sui Jingfeng
parent 71ce046327
commit cc575083cd
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/loongson/lsdc_drv.c
View File

@ -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 *