drm/amd/powerplay: add interface to get clock by type with latency for display (v2)

This patch adds get clock by type with latency, display will use it to get
current clocks with latency.

v2: fix the missed mutex lock before return.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_pp_smu.c

@@ -392,14 +392,21 @@ bool dm_pp_get_clock_levels_by_type_with_latency(
 	void *pp_handle = adev->powerplay.pp_handle;
 	struct pp_clock_levels_with_latency pp_clks = { 0 };
 	const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
+	int ret;
+
+	if (pp_funcs && pp_funcs->get_clock_by_type_with_latency) {
+		ret = pp_funcs->get_clock_by_type_with_latency(pp_handle,
+						dc_to_pp_clock_type(clk_type),
+						&pp_clks);
+		if (ret)
+			return false;
+	} else if (adev->smu.ppt_funcs && adev->smu.ppt_funcs->get_clock_by_type_with_latency) {
+		if (smu_get_clock_by_type_with_latency(&adev->smu,
+						       dc_to_pp_clock_type(clk_type),
+						       &pp_clks))
+			return false;
+	}
 
-	if (!pp_funcs || !pp_funcs->get_clock_by_type_with_latency)
-		return false;
-
-	if (pp_funcs->get_clock_by_type_with_latency(pp_handle,
-						     dc_to_pp_clock_type(clk_type),
-						     &pp_clks))
-		return false;
 
 	pp_to_dc_clock_levels_with_latency(&pp_clks, clk_level_info, clk_type);
 

drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h

@@ -224,6 +224,11 @@ struct pptable_funcs {
 	int (*populate_umd_state_clk)(struct smu_context *smu);
 	int (*print_clk_levels)(struct smu_context *smu, enum pp_clock_type type, char *buf);
 	int (*force_clk_levels)(struct smu_context *smu, enum pp_clock_type type, uint32_t mask);
+	int (*get_clock_by_type_with_latency)(struct smu_context *smu,
+					      enum amd_pp_clock_type type,
+					      struct
+					      pp_clock_levels_with_latency
+					      *clocks);
 };
 
 struct smu_funcs
@@ -379,6 +384,9 @@ struct smu_funcs
 	((smu)->funcs->get_clock_by_type ? (smu)->funcs->get_clock_by_type((smu), (type), (clocks)) : 0)
 #define smu_get_max_high_clocks(smu, clocks) \
 	((smu)->funcs->get_max_high_clocks ? (smu)->funcs->get_max_high_clocks((smu), (clocks)) : 0)
+#define smu_get_clock_by_type_with_latency(smu, type, clocks) \
+	((smu)->ppt_funcs->get_clock_by_type_with_latency ? (smu)->ppt_funcs->get_clock_by_type_with_latency((smu), (type), (clocks)) : 0)
+
 
 extern int smu_get_atom_data_table(struct smu_context *smu, uint32_t table,
 				   uint16_t *size, uint8_t *frev, uint8_t *crev,

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

@@ -782,6 +782,44 @@ static int vega20_force_clk_levels(struct smu_context *smu,
 	return 0;
 }
 
+static int vega20_get_clock_by_type_with_latency(struct smu_context *smu,
+						 enum amd_pp_clock_type type,
+						 struct pp_clock_levels_with_latency *clocks)
+{
+	int ret;
+	struct vega20_single_dpm_table *single_dpm_table;
+	struct smu_dpm_context *smu_dpm = &smu->smu_dpm;
+	struct vega20_dpm_table *dpm_table = NULL;
+
+	dpm_table = smu_dpm->dpm_context;
+
+	mutex_lock(&smu->mutex);
+
+	switch (type) {
+	case amd_pp_sys_clock:
+		single_dpm_table = &(dpm_table->gfx_table);
+		ret = vega20_get_clk_table(smu, clocks, single_dpm_table);
+		break;
+	case amd_pp_mem_clock:
+		single_dpm_table = &(dpm_table->mem_table);
+		ret = vega20_get_clk_table(smu, clocks, single_dpm_table);
+		break;
+	case amd_pp_dcef_clock:
+		single_dpm_table = &(dpm_table->dcef_table);
+		ret = vega20_get_clk_table(smu, clocks, single_dpm_table);
+		break;
+	case amd_pp_soc_clock:
+		single_dpm_table = &(dpm_table->soc_table);
+		ret = vega20_get_clk_table(smu, clocks, single_dpm_table);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	mutex_unlock(&smu->mutex);
+	return ret;
+}
+
 static const struct pptable_funcs vega20_ppt_funcs = {
 	.alloc_dpm_context = vega20_allocate_dpm_context,
 	.store_powerplay_table = vega20_store_powerplay_table,
@@ -794,7 +832,7 @@ static const struct pptable_funcs vega20_ppt_funcs = {
 	.populate_umd_state_clk = vega20_populate_umd_state_clk,
 	.print_clk_levels = vega20_print_clk_levels,
 	.force_clk_levels = vega20_force_clk_levels,
-
+	.get_clock_by_type_with_latency = vega20_get_clock_by_type_with_latency,
 };
 
 void vega20_set_ppt_funcs(struct smu_context *smu)