mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

drm/amd/amdgpu: Add rev_id workaround logic for SRIOV setup 

- When we are under SRIOV setup, the rev_id cannot be read
  properly. Therefore, we will return default value for it

Signed-off-by: Bokun Zhang <Bokun.Zhang@amd.com>
Reviewed-by: Monk Liu <monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bokun Zhang 2020-11-09 14:09:03 -05:00 committed by Alex Deucher
parent 25a35065c0
commit de21e4aeb2
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c
View File

@ -53,8 +53,17 @@ static void nbio_v2_3_remap_hdp_registers(struct amdgpu_device *adev)
static u32 nbio_v2_3_get_rev_id(struct amdgpu_device *adev)
{
u32 tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
u32 tmp;
/*
* guest vm gets 0xffffffff when reading RCC_DEV0_EPF0_STRAP0,
* therefore we force rev_id to 0 (which is the default value)
*/
if (amdgpu_sriov_vf(adev)) {
return 0;
}
tmp = RREG32_SOC15(NBIO, 0, mmRCC_DEV0_EPF0_STRAP0);
tmp &= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0_MASK;
tmp >>= RCC_DEV0_EPF0_STRAP0__STRAP_ATI_REV_ID_DEV0_F0__SHIFT;