drm/amd: add gfxoff support on navi10

add the gfxoff interface to navi10,it's disabled by default.
Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -920,3 +920,23 @@ int amdgpu_dpm_get_mclk(struct amdgpu_device *adev, bool low)
 	else
 		return (adev)->powerplay.pp_funcs->get_mclk((adev)->powerplay.pp_handle, (low));
 }
+
+int amdgpu_dpm_set_powergating_by_smu(struct amdgpu_device *adev, uint32_t block_type, bool gate)
+{
+	int ret = 0;
+	bool swsmu = is_support_sw_smu(adev);
+
+	switch (block_type) {
+	case AMD_IP_BLOCK_TYPE_GFX:
+		if (swsmu)
+			ret = smu_gfx_off_control(&adev->smu, gate);
+		else
+			ret = ((adev)->powerplay.pp_funcs->set_powergating_by_smu(
+				(adev)->powerplay.pp_handle, block_type, gate));
+		break;
+	default:
+		break;
+	}
+
+	return ret;
+}

drivers/gpu/drm/amd/amdgpu/amdgpu_dpm.h

@@ -355,10 +355,6 @@ enum amdgpu_pcie_gen {
 		((adev)->powerplay.pp_funcs->set_clockgating_by_smu(\
 			(adev)->powerplay.pp_handle, msg_id))
 
-#define amdgpu_dpm_set_powergating_by_smu(adev, block_type, gate) \
-		((adev)->powerplay.pp_funcs->set_powergating_by_smu(\
-			(adev)->powerplay.pp_handle, block_type, gate))
-
 #define amdgpu_dpm_get_power_profile_mode(adev, buf) \
 		((adev)->powerplay.pp_funcs->get_power_profile_mode(\
 			(adev)->powerplay.pp_handle, buf))
@@ -520,6 +516,9 @@ enum amdgpu_pcie_gen amdgpu_get_pcie_gen_support(struct amdgpu_device *adev,
 struct amd_vce_state*
 amdgpu_get_vce_clock_state(void *handle, u32 idx);
 
+int amdgpu_dpm_set_powergating_by_smu(struct amdgpu_device *adev,
+				      uint32_t block_type, bool gate);
+
 extern int amdgpu_dpm_get_sclk(struct amdgpu_device *adev, bool low);
 
 extern int amdgpu_dpm_get_mclk(struct amdgpu_device *adev, bool low);

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

@@ -547,7 +547,9 @@ void amdgpu_gfx_off_ctrl(struct amdgpu_device *adev, bool enable)
 	if (!(adev->pm.pp_feature & PP_GFXOFF_MASK))
 		return;
 
-	if (!adev->powerplay.pp_funcs || !adev->powerplay.pp_funcs->set_powergating_by_smu)
+	if (!is_support_sw_smu(adev) &&
+	    (!adev->powerplay.pp_funcs ||
+	     !adev->powerplay.pp_funcs->set_powergating_by_smu))
 		return;
 
 

drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h

@@ -553,7 +553,7 @@ struct smu_funcs
 	int (*set_fan_speed_percent)(struct smu_context *smu, uint32_t speed);
 	int (*set_fan_speed_rpm)(struct smu_context *smu, uint32_t speed);
 	int (*set_xgmi_pstate)(struct smu_context *smu, uint32_t pstate);
-
+	int (*gfx_off_control)(struct smu_context *smu, bool enable);
 };
 
 #define smu_init_microcode(smu) \
@@ -592,6 +592,9 @@ struct smu_funcs
 	((smu)->funcs->set_tool_table_location ? (smu)->funcs->set_tool_table_location((smu)) : 0)
 #define smu_notify_memory_pool_location(smu) \
 	((smu)->funcs->notify_memory_pool_location ? (smu)->funcs->notify_memory_pool_location((smu)) : 0)
+#define smu_gfx_off_control(smu, enable) \
+	((smu)->funcs->gfx_off_control ? (smu)->funcs->gfx_off_control((smu), (enable)) : 0)
+
 #define smu_write_watermarks_table(smu) \
 	((smu)->funcs->write_watermarks_table ? (smu)->funcs->write_watermarks_table((smu)) : 0)
 #define smu_set_last_dcef_min_deep_sleep_clk(smu) \

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -1547,6 +1547,21 @@ smu_v11_0_set_watermarks_for_clock_ranges(struct smu_context *smu, struct
 	return ret;
 }
 
+static int smu_v11_0_gfx_off_control(struct smu_context *smu, bool enable)
+{
+	int ret = 0;
+
+	mutex_lock(&smu->mutex);
+	if (enable)
+		ret = smu_send_smc_msg(smu, SMU_MSG_AllowGfxOff);
+	else
+		ret = smu_send_smc_msg(smu, SMU_MSG_DisallowGfxOff);
+	mutex_unlock(&smu->mutex);
+
+	return ret;
+}
+
+
 static int smu_v11_0_get_clock_ranges(struct smu_context *smu,
 				      uint32_t *clock,
 				      PPCLK_e clock_select,
@@ -1919,6 +1934,7 @@ static const struct smu_funcs smu_v11_0_funcs = {
 	.set_fan_speed_percent = smu_v11_0_set_fan_speed_percent,
 	.set_fan_speed_rpm = smu_v11_0_set_fan_speed_rpm,
 	.set_xgmi_pstate = smu_v11_0_set_xgmi_pstate,
+	.gfx_off_control = smu_v11_0_gfx_off_control,
 };
 
 void smu_v11_0_set_smu_funcs(struct smu_context *smu)