Commit de21e4ae authored by Bokun Zhang's avatar Bokun Zhang Committed by Alex Deucher
Browse files

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: default avatarBokun Zhang <Bokun.Zhang@amd.com>
Reviewed-by: default avatarMonk Liu <monk.liu@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 25a35065

drivers/gpu/drm/amd/amdgpu/nbio_v2_3.c

+10 −1
Original line number Diff line number Diff line
@@ -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;