drm/nouveau/therm: skip probing for devices not specified in thermal tables

[linux.git] / drivers / gpu / drm / nouveau / nvkm / subdev / bios / extdev.c

diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c
index b8578359e61bc4c17d79a4c0f4b96404ff365823..118e33174cbed165cc1ddb7fef96715c715ae9d7 100644 (file)
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/extdev.c
@@ -46,6 +46,19 @@ extdev_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *len, u8 *cnt)
        return extdev + *hdr;
 }
 
+bool
+nvbios_extdev_skip_probe(struct nvkm_bios *bios)
+{
+       u8  ver, hdr, len, cnt;
+       u16 data = extdev_table(bios, &ver, &hdr, &len, &cnt);
+       if (data && ver == 0x40 && hdr >= 5) {
+               u8 flags = nvbios_rd08(bios, data - hdr + 4);
+               if (flags & 1)
+                       return true;
+       }
+       return false;
+}
+
 static u16
 nvbios_extdev_entry(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
 {