drm/amdgpu/gfx8: Enable GFX PG on CZ

Based on Alex's patches this enables GFX PG on CZ.

Tested with xonotic-glx/glxgears/supertuxkart and idle desktop.
Also read-back registers via umr for verificiation that the bits
are truly enabled.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c
index a65c9602947613eb8b7a1778184b3b3050b562ba..c1cc7cc1498b8b159dcc6df765d0dd9d8d8557d6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -1222,7 +1222,15 @@ static int vi_common_early_init(void *handle)
                        AMD_CG_SUPPORT_HDP_LS |
                        AMD_CG_SUPPORT_SDMA_MGCG |
                        AMD_CG_SUPPORT_SDMA_LS;
+               /* rev0 hardware doesn't support PG */
                adev->pg_flags = 0;
+               if (adev->rev_id != 0x00)
+                       adev->pg_flags |= AMD_PG_SUPPORT_GFX_PG |
+                               AMD_PG_SUPPORT_GFX_SMG |
+                               AMD_PG_SUPPORT_GFX_DMG |
+                               AMD_PG_SUPPORT_CP |
+                               AMD_PG_SUPPORT_RLC_SMU_HS |
+                               AMD_PG_SUPPORT_GFX_PIPELINE;
                adev->external_rev_id = adev->rev_id + 0x1;
                break;
        case CHIP_STONEY: