drm/amdgpu/powerplay: check vrefresh when when changing displays

Compare the current vrefresh in addition to the number of displays
when determining whether or not the smu needs updates when changing
modes. The SMU needs to be updated if the vbi timeout changes due
to a different refresh rate.  Fixes flickering around mode changes
in some cases on polaris parts.

Reviewed-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c

@@ -4132,6 +4132,9 @@ smu7_check_smc_update_required_for_display_configuration(struct pp_hwmgr *hwmgr)
 	if (data->display_timing.num_existing_displays != hwmgr->display_config->num_display)
 		is_update_required = true;
 
+	if (data->display_timing.vrefresh != hwmgr->display_config->vrefresh)
+		is_update_required = true;
+
 	if (phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, PHM_PlatformCaps_SclkDeepSleep)) {
 		if (data->display_timing.min_clock_in_sr != hwmgr->display_config->min_core_set_clock_in_sr &&
 			(data->display_timing.min_clock_in_sr >= SMU7_MINIMUM_ENGINE_CLOCK ||

drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.h

@@ -156,6 +156,7 @@ struct smu7_vbios_boot_state {
 struct smu7_display_timing {
 	uint32_t  min_clock_in_sr;
 	uint32_t  num_existing_displays;
+	uint32_t  vrefresh;
 };
 
 struct smu7_dpmlevel_enable_mask {

drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c

@@ -1231,6 +1231,7 @@ static int ci_populate_single_memory_level(
 	memory_level->DisplayWatermark = PPSMC_DISPLAY_WATERMARK_LOW;
 
 	data->display_timing.num_existing_displays = hwmgr->display_config->num_display;
+	data->display_timing.vrefresh = hwmgr->display_config->vrefresh;
 
 	/* stutter mode not support on ci */
 

drivers/gpu/drm/amd/powerplay/smumgr/fiji_smumgr.c

@@ -1210,7 +1210,8 @@ static int fiji_populate_single_memory_level(struct pp_hwmgr *hwmgr,
 	 * PECI_GetNumberOfActiveDisplays(hwmgr->pPECI,
 	 * &(data->DisplayTiming.numExistingDisplays));
 	 */
-	data->display_timing.num_existing_displays = 1;
+	data->display_timing.num_existing_displays = hwmgr->display_config->num_display;
+	data->display_timing.vrefresh = hwmgr->display_config->vrefresh;
 
 	if (mclk_stutter_mode_threshold &&
 		(clock <= mclk_stutter_mode_threshold) &&

drivers/gpu/drm/amd/powerplay/smumgr/iceland_smumgr.c

@@ -1280,6 +1280,7 @@ static int iceland_populate_single_memory_level(
 	memory_level->DisplayWatermark = PPSMC_DISPLAY_WATERMARK_LOW;
 
 	data->display_timing.num_existing_displays = hwmgr->display_config->num_display;
+	data->display_timing.vrefresh = hwmgr->display_config->vrefresh;
 
 	/* stutter mode not support on iceland */
 

drivers/gpu/drm/amd/powerplay/smumgr/polaris10_smumgr.c

@@ -1103,6 +1103,7 @@ static int polaris10_populate_single_memory_level(struct pp_hwmgr *hwmgr,
 	mem_level->DisplayWatermark = PPSMC_DISPLAY_WATERMARK_LOW;
 
 	data->display_timing.num_existing_displays = hwmgr->display_config->num_display;
+	data->display_timing.vrefresh = hwmgr->display_config->vrefresh;
 
 	if (mclk_stutter_mode_threshold &&
 		(clock <= mclk_stutter_mode_threshold) &&

drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.c

@@ -1004,6 +1004,7 @@ static int tonga_populate_single_memory_level(
 	memory_level->DisplayWatermark = PPSMC_DISPLAY_WATERMARK_LOW;
 
 	data->display_timing.num_existing_displays = hwmgr->display_config->num_display;
+	data->display_timing.vrefresh = hwmgr->display_config->vrefresh;
 
 	if ((mclk_stutter_mode_threshold != 0) &&
 	    (memory_clock <= mclk_stutter_mode_threshold) &&

drivers/gpu/drm/amd/powerplay/smumgr/vegam_smumgr.c

@@ -1009,6 +1009,7 @@ static int vegam_populate_single_memory_level(struct pp_hwmgr *hwmgr,
 	mem_level->DisplayWatermark = PPSMC_DISPLAY_WATERMARK_LOW;
 
 	data->display_timing.num_existing_displays = hwmgr->display_config->num_display;
+	data->display_timing.vrefresh = hwmgr->display_config->vrefresh;
 
 	if (mclk_stutter_mode_threshold &&
 		(clock <= mclk_stutter_mode_threshold) &&