drm/amd/powerplay: add function display_configuration_changed for navi10

1.add callback function to support navi10 asic.
2.Remove unnecessary logical code.
Signed-off-by: NKevin Wang <kevin1.wang@amd.com>
Reviewed-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -671,6 +671,30 @@ static int navi10_pre_display_config_changed(struct smu_context *smu)
 	return ret;
 }
 
+static int navi10_display_config_changed(struct smu_context *smu)
+{
+	int ret = 0;
+
+	if ((smu->watermarks_bitmap & WATERMARKS_EXIST) &&
+	    !(smu->watermarks_bitmap & WATERMARKS_LOADED)) {
+		ret = smu_write_watermarks_table(smu);
+		if (ret)
+			return ret;
+
+		smu->watermarks_bitmap |= WATERMARKS_LOADED;
+	}
+
+	if ((smu->watermarks_bitmap & WATERMARKS_EXIST) &&
+	    smu_feature_is_supported(smu, SMU_FEATURE_DPM_DCEFCLK_BIT) &&
+	    smu_feature_is_supported(smu, SMU_FEATURE_DPM_SOCCLK_BIT)) {
+		ret = smu_send_smc_msg_with_param(smu, SMU_MSG_NumOfDisplays,
+						  smu->display_config->num_display);
+		if (ret)
+			return ret;
+	}
+
+	return ret;
+}
 static const struct pptable_funcs navi10_ppt_funcs = {
 	.tables_init = navi10_tables_init,
 	.alloc_dpm_context = navi10_allocate_dpm_context,
@@ -691,6 +715,7 @@ static const struct pptable_funcs navi10_ppt_funcs = {
 	.populate_umd_state_clk = navi10_populate_umd_state_clk,
 	.get_clock_by_type_with_latency = navi10_get_clock_by_type_with_latency,
 	.pre_display_config_changed = navi10_pre_display_config_changed,
+	.display_config_changed = navi10_display_config_changed,
 };
 
 void navi10_set_ppt_funcs(struct smu_context *smu)

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -714,9 +714,21 @@ static int smu_v11_0_write_pptable(struct smu_context *smu)
 
 static int smu_v11_0_write_watermarks_table(struct smu_context *smu)
 {
-	return smu_update_table(smu, SMU_TABLE_WATERMARKS,
-				smu->smu_table.tables[SMU_TABLE_WATERMARKS].cpu_addr,
+	int ret = 0;
+	struct smu_table_context *smu_table = &smu->smu_table;
+	struct smu_table *table = NULL;
+
+	table = &smu_table->tables[SMU_TABLE_WATERMARKS];
+	if (!table)
+		return -EINVAL;
+
+	if (!table->cpu_addr)
+		return -EINVAL;
+
+	ret = smu_update_table(smu, SMU_TABLE_WATERMARKS, table->cpu_addr,
 				true);
+
+	return ret;
 }
 
 static int smu_v11_0_set_deep_sleep_dcefclk(struct smu_context *smu, uint32_t clk)

drivers/gpu/drm/amd/powerplay/vega20_ppt.c

@@ -1992,17 +1992,9 @@ static int vega20_display_config_changed(struct smu_context *smu)
 {
 	int ret = 0;
 
-	if (!smu->funcs)
-		return -EINVAL;
-
-	if (!smu->smu_dpm.dpm_context ||
-	    !smu->smu_table.tables ||
-	    !smu->smu_table.tables[TABLE_WATERMARKS].cpu_addr)
-		return -EINVAL;
-
 	if ((smu->watermarks_bitmap & WATERMARKS_EXIST) &&
 	    !(smu->watermarks_bitmap & WATERMARKS_LOADED)) {
-		ret = smu->funcs->write_watermarks_table(smu);
+		ret = smu_write_watermarks_table(smu);
 		if (ret) {
 			pr_err("Failed to update WMTABLE!");
 			return ret;