drm/amdgpu: disable GFXOFF and PG during compute for GFX9

Temporary workaround to fix issues observed in some compute
applications when GFXOFF is enabled on GFX9.

Signed-off-by: Jesse Zhang <[email protected]>
Acked-by: Alex Deucher <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

Author: Jie1zhang

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

@@ -683,12 +683,19 @@ int amdgpu_amdkfd_submit_ib(struct amdgpu_device *adev,
 
 void amdgpu_amdkfd_set_compute_idle(struct amdgpu_device *adev, bool idle)
 {
+	enum amd_powergating_state state = idle ? AMD_PG_STATE_GATE : AMD_PG_STATE_UNGATE;
 	/* Temporary workaround to fix issues observed in some
 	 * compute applications when GFXOFF is enabled on GFX11.
 	 */
 	if (IP_VERSION_MAJ(amdgpu_ip_version(adev, GC_HWIP, 0)) == 11) {
 		pr_debug("GFXOFF is %s\n", idle ? "enabled" : "disabled");
 		amdgpu_gfx_off_ctrl(adev, idle);
+	} else if ((IP_VERSION_MAJ(amdgpu_ip_version(adev, GC_HWIP, 0)) == 9) &&
+		(adev->flags & AMD_IS_APU)) {
+		/* Disable GFXOFF and PG. Temporary workaround
+		 * to fix some compute applications issue on GFX9.
+		 */
+		adev->ip_blocks[AMD_IP_BLOCK_TYPE_GFX].version->funcs->set_powergating_state((void *)adev, state);
 	}
 	amdgpu_dpm_switch_power_profile(adev,
 					PP_SMC_POWER_PROFILE_COMPUTE,