drm/amd/powerplay: refine vce dpm update code on Cz.

Program HardMin based on the vce_arbiter.ecclk
if ecclk is 0, disable ECLK DPM 0. Otherwise VCE
could hang if switching SCLK from DPM 0 to 6/7

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 16 insertions, 8 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
index 4b14f259a147..0fb4e8c8f5e1 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/cz_hwmgr.c
@@ -1402,14 +1402,22 @@ int  cz_dpm_update_vce_dpm(struct pp_hwmgr *hwmgr)
                                              cz_hwmgr->vce_dpm.hard_min_clk,
                                                 PPSMC_MSG_SetEclkHardMin));
         } else {
-                /*EPR# 419220 -HW limitation to to */
-                cz_hwmgr->vce_dpm.hard_min_clk = hwmgr->vce_arbiter.ecclk;
-                smum_send_msg_to_smc_with_parameter(hwmgr->smumgr,
-                                            PPSMC_MSG_SetEclkHardMin,
-                                            cz_get_eclk_level(hwmgr,
-                                     cz_hwmgr->vce_dpm.hard_min_clk,
-                                          PPSMC_MSG_SetEclkHardMin));
-
+                /*Program HardMin based on the vce_arbiter.ecclk */
+                if (hwmgr->vce_arbiter.ecclk == 0) {
+                        smum_send_msg_to_smc_with_parameter(hwmgr->smumgr,
+                                            PPSMC_MSG_SetEclkHardMin, 0);
+                /* disable ECLK DPM 0. Otherwise VCE could hang if
+                 * switching SCLK from DPM 0 to 6/7 */
+                        smum_send_msg_to_smc_with_parameter(hwmgr->smumgr,
+                                        PPSMC_MSG_SetEclkSoftMin, 1);
+                } else {
+                        cz_hwmgr->vce_dpm.hard_min_clk = hwmgr->vce_arbiter.ecclk;
+                        smum_send_msg_to_smc_with_parameter(hwmgr->smumgr,
+                                                PPSMC_MSG_SetEclkHardMin,
+                                                cz_get_eclk_level(hwmgr,
+                                                cz_hwmgr->vce_dpm.hard_min_clk,
+                                                PPSMC_MSG_SetEclkHardMin));
+                }
         }
         return 0;
 }