drm/amdgpu: Allow switching to CUSTOM profile on smu7 v2

Allow changing to the CUSTOM profile without requiring the
parameters being passed in each time. Store the values in
the smu7_profiling table since it's defined here anyways

v2: Add check that CUSTOM was previously set
Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -77,7 +77,7 @@
 #define PCIE_BUS_CLK                10000
 #define TCLK                        (PCIE_BUS_CLK / 10)
 
-static const struct profile_mode_setting smu7_profiling[7] =
+static struct profile_mode_setting smu7_profiling[7] =
 					{{0, 0, 0, 0, 0, 0, 0, 0},
 					 {1, 0, 100, 30, 1, 0, 100, 10},
 					 {1, 10, 0, 30, 0, 0, 0, 0},
@@ -4984,17 +4984,27 @@ static int smu7_set_power_profile_mode(struct pp_hwmgr *hwmgr, long *input, uint
 	mode = input[size];
 	switch (mode) {
 	case PP_SMC_POWER_PROFILE_CUSTOM:
-		if (size < 8)
+		if (size < 8 && size != 0)
 			return -EINVAL;
-
-		tmp.bupdate_sclk = input[0];
-		tmp.sclk_up_hyst = input[1];
-		tmp.sclk_down_hyst = input[2];
-		tmp.sclk_activity = input[3];
-		tmp.bupdate_mclk = input[4];
-		tmp.mclk_up_hyst = input[5];
-		tmp.mclk_down_hyst = input[6];
-		tmp.mclk_activity = input[7];
+		/* If only CUSTOM is passed in, use the saved values. Check
+		 * that we actually have a CUSTOM profile by ensuring that
+		 * the "use sclk" or the "use mclk" bits are set
+		 */
+		tmp = smu7_profiling[PP_SMC_POWER_PROFILE_CUSTOM];
+		if (size == 0) {
+			if (tmp.bupdate_sclk == 0 && tmp.bupdate_mclk == 0)
+				return -EINVAL;
+		} else {
+			tmp.bupdate_sclk = input[0];
+			tmp.sclk_up_hyst = input[1];
+			tmp.sclk_down_hyst = input[2];
+			tmp.sclk_activity = input[3];
+			tmp.bupdate_mclk = input[4];
+			tmp.mclk_up_hyst = input[5];
+			tmp.mclk_down_hyst = input[6];
+			tmp.mclk_activity = input[7];
+			smu7_profiling[PP_SMC_POWER_PROFILE_CUSTOM] = tmp;
+		}
 		if (!smum_update_dpm_settings(hwmgr, &tmp)) {
 			memcpy(&data->current_profile_setting, &tmp, sizeof(struct profile_mode_setting));
 			hwmgr->power_profile_mode = mode;