drm/amd/powerplay: set a default fclk/gfxclk ratio

Otherwise big gap between these two clocks may causes
some hangs.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 19 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index 07a36af0f237..10c80aae030f 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -120,6 +120,7 @@ static void vega20_set_default_registry_data(struct pp_hwmgr *hwmgr)
         data->registry_data.disable_auto_wattman = 1;
         data->registry_data.auto_wattman_debug = 0;
         data->registry_data.auto_wattman_sample_period = 100;
+        data->registry_data.fclk_gfxclk_ratio = 0x3F6CCCCD;
         data->registry_data.auto_wattman_threshold = 50;
         data->registry_data.gfxoff_controlled_by_driver = 1;
         data->gfxoff_allowed = false;
@@ -829,6 +830,16 @@ static int vega20_enable_all_smu_features(struct pp_hwmgr *hwmgr)
         return 0;
 }
 
+static int vega20_send_clock_ratio(struct pp_hwmgr *hwmgr)
+{
+        struct vega20_hwmgr *data =
+                        (struct vega20_hwmgr *)(hwmgr->backend);
+
+        return smum_send_msg_to_smc_with_parameter(hwmgr,
+                        PPSMC_MSG_SetFclkGfxClkRatio,
+                        data->registry_data.fclk_gfxclk_ratio);
+}
+
 static int vega20_disable_all_smu_features(struct pp_hwmgr *hwmgr)
 {
         struct vega20_hwmgr *data =
@@ -1532,6 +1543,11 @@ static int vega20_enable_dpm_tasks(struct pp_hwmgr *hwmgr)
                         "[EnableDPMTasks] Failed to enable all smu features!",
                         return result);
 
+        result = vega20_send_clock_ratio(hwmgr);
+        PP_ASSERT_WITH_CODE(!result,
+                        "[EnableDPMTasks] Failed to send clock ratio!",
+                        return result);
+
         /* Initialize UVD/VCE powergating state */
         vega20_init_powergate_state(hwmgr);
 
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.h b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.h
index 56fe6a0d42e8..25faaa5c5b10 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.h
@@ -328,6 +328,7 @@ struct vega20_registry_data {
         uint8_t   disable_auto_wattman;
         uint32_t  auto_wattman_debug;
         uint32_t  auto_wattman_sample_period;
+        uint32_t  fclk_gfxclk_ratio;
         uint8_t   auto_wattman_threshold;
         uint8_t   log_avfs_param;
         uint8_t   enable_enginess;
diff --git a/drivers/gpu/drm/amd/powerplay/inc/vega20_ppsmc.h b/drivers/gpu/drm/amd/powerplay/inc/vega20_ppsmc.h
index 45d64a81e945..4f63a736ea0e 100644
--- a/drivers/gpu/drm/amd/powerplay/inc/vega20_ppsmc.h
+++ b/drivers/gpu/drm/amd/powerplay/inc/vega20_ppsmc.h
@@ -105,7 +105,8 @@
 #define PPSMC_MSG_SetSystemVirtualDramAddrHigh   0x4B
 #define PPSMC_MSG_SetSystemVirtualDramAddrLow    0x4C
 #define PPSMC_MSG_WaflTest                       0x4D
-// Unused ID 0x4E to 0x50
+#define PPSMC_MSG_SetFclkGfxClkRatio             0x4E
+// Unused ID 0x4F to 0x50
 #define PPSMC_MSG_AllowGfxOff                    0x51
 #define PPSMC_MSG_DisallowGfxOff                 0x52
 #define PPSMC_MSG_GetPptLimit                    0x53