drm/amd/powerplay: support retrieving and adjusting dcefclock power levels V2

User can use "pp_dpm_dcefclk" to retrieve and adjust dcefclock power
levels.

V2: expose this interface for Vega10 and later ASICs only

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

1 files changed, 51 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 4e7399c310e2..8c1fa985c7d4 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -1747,6 +1747,17 @@ static int vega20_upload_dpm_min_level(struct pp_hwmgr *hwmgr, uint32_t feature_
 					return ret);
 	}
 
+	if (data->smu_features[GNLD_DPM_DCEFCLK].enabled &&
+	   (feature_mask & FEATURE_DPM_DCEFCLK_MASK)) {
+		min_freq = data->dpm_table.dcef_table.dpm_state.hard_min_level;
+
+		PP_ASSERT_WITH_CODE(!(ret = smum_send_msg_to_smc_with_parameter(
+					hwmgr, PPSMC_MSG_SetHardMinByFreq,
+					(PPCLK_DCEFCLK << 16) | (min_freq & 0xffff))),
+					"Failed to set hard min dcefclk!",
+					return ret);
+	}
+
 	return ret;
 }
 
@@ -2259,7 +2270,7 @@ static int vega20_force_clock_level(struct pp_hwmgr *hwmgr,
 		enum pp_clock_type type, uint32_t mask)
 {
 	struct vega20_hwmgr *data = (struct vega20_hwmgr *)(hwmgr->backend);
-	uint32_t soft_min_level, soft_max_level;
+	uint32_t soft_min_level, soft_max_level, hard_min_level;
 	int ret = 0;
 
 	switch (type) {
@@ -2374,6 +2385,28 @@ static int vega20_force_clock_level(struct pp_hwmgr *hwmgr,
 
 		break;
 
+	case PP_DCEFCLK:
+		hard_min_level = mask ? (ffs(mask) - 1) : 0;
+
+		if (hard_min_level >= data->dpm_table.dcef_table.count) {
+			pr_err("Clock level specified %d is over max allowed %d\n",
+					hard_min_level,
+					data->dpm_table.dcef_table.count - 1);
+			return -EINVAL;
+		}
+
+		data->dpm_table.dcef_table.dpm_state.hard_min_level =
+			data->dpm_table.dcef_table.dpm_levels[hard_min_level].value;
+
+		ret = vega20_upload_dpm_min_level(hwmgr, FEATURE_DPM_DCEFCLK_MASK);
+		PP_ASSERT_WITH_CODE(!ret,
+			"Failed to upload boot level to lowest!",
+			return ret);
+
+		//TODO: Setting DCEFCLK max dpm level is not supported
+
+		break;
+
 	case PP_PCIE:
 		soft_min_level = mask ? (ffs(mask) - 1) : 0;
 		soft_max_level = mask ? (fls(mask) - 1) : 0;
@@ -3040,6 +3073,23 @@ static int vega20_print_clock_levels(struct pp_hwmgr *hwmgr,
 				fclk_dpm_table->dpm_levels[i].value == (now / 100) ? "*" : "");
 		break;
 
+	case PP_DCEFCLK:
+		ret = vega20_get_current_clk_freq(hwmgr, PPCLK_DCEFCLK, &now);
+		PP_ASSERT_WITH_CODE(!ret,
+				"Attempt to get current dcefclk freq Failed!",
+				return ret);
+
+		ret = vega20_get_dcefclocks(hwmgr, &clocks);
+		PP_ASSERT_WITH_CODE(!ret,
+				"Attempt to get dcefclk levels Failed!",
+				return ret);
+
+		for (i = 0; i < clocks.num_levels; i++)
+			size += sprintf(buf + size, "%d: %uMhz %s\n",
+				i, clocks.data[i].clocks_in_khz / 1000,
+				(clocks.data[i].clocks_in_khz == now * 10) ? "*" : "");
+		break;
+
 	case PP_PCIE:
 		gen_speed = (RREG32_PCIE(smnPCIE_LC_SPEED_CNTL) &
 			     PSWUSP0_PCIE_LC_SPEED_CNTL__LC_CURRENT_DATA_RATE_MASK)