drm/amd/amdgpu: enable sram fgcg on gc 12.0.1

enable sram fgcg on gc 12.0.1
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Likun Gao <Likun.Gao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gfx_v12_0.c

@@ -3797,7 +3797,20 @@ static void gfx_v12_0_update_repeater_fgcg(struct amdgpu_device *adev,
 static void gfx_v12_0_update_sram_fgcg(struct amdgpu_device *adev,
 				       bool enable)
 {
-	/* TODO */
+	uint32_t def, data;
+
+	if (!(adev->cg_flags & AMD_CG_SUPPORT_GFX_FGCG))
+		return;
+
+	def = data = RREG32_SOC15(GC, 0, regRLC_CGTT_MGCG_OVERRIDE);
+
+	if (enable)
+		data &= ~RLC_CGTT_MGCG_OVERRIDE__GFXIP_FGCG_OVERRIDE_MASK;
+	else
+		data |= RLC_CGTT_MGCG_OVERRIDE__GFXIP_FGCG_OVERRIDE_MASK;
+
+	if (def != data)
+		WREG32_SOC15(GC, 0, regRLC_CGTT_MGCG_OVERRIDE, data);
 }
 
 static int gfx_v12_0_update_gfx_clock_gating(struct amdgpu_device *adev,

drivers/gpu/drm/amd/amdgpu/soc24.c

@@ -407,6 +407,7 @@ static int soc24_common_early_init(void *handle)
 			AMD_CG_SUPPORT_GFX_3D_CGCG |
 			AMD_CG_SUPPORT_GFX_3D_CGLS |
 			AMD_CG_SUPPORT_REPEATER_FGCG |
+			AMD_CG_SUPPORT_GFX_FGCG |
 			AMD_CG_SUPPORT_GFX_PERF_CLK;
 		adev->pg_flags = AMD_PG_SUPPORT_VCN |
 			AMD_PG_SUPPORT_JPEG |