drm/amd/powrplay: add interface for dc to get max clock values

dc (display component) needs maximum clock values of uclock,
socclk, dcefclk, to calculate display bandwidth.
Signed-off-by: Nhersen wu <hersenxs.wu@amd.com>
Acked-by: NAlex Deucher <alexander.deucher@amd.com>
Reviewed-by: NHuang Rui <ray.huang@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -25,6 +25,7 @@
 #include "amdgpu.h"
 #include "kgd_pp_interface.h"
 #include "dm_pp_interface.h"
+#include "dm_pp_smu.h"
 
 #define SMU_THERMAL_MINIMUM_ALERT_TEMP		0
 #define SMU_THERMAL_MAXIMUM_ALERT_TEMP		255
@@ -678,6 +679,7 @@ struct smu_funcs
 	int (*gfx_off_control)(struct smu_context *smu, bool enable);
 	int (*register_irq_handler)(struct smu_context *smu);
 	int (*set_azalia_d3_pme)(struct smu_context *smu);
+	int (*get_max_sustainable_clocks_by_dc)(struct smu_context *smu, struct pp_smu_nv_clock_table *max_clocks);
 };
 
 #define smu_init_microcode(smu) \
@@ -884,6 +886,8 @@ struct smu_funcs
 	((smu)->funcs->set_azalia_d3_pme ? (smu)->funcs->set_azalia_d3_pme((smu)) : 0)
 #define smu_get_uclk_dpm_states(smu, clocks_in_khz, num_states) \
 	((smu)->ppt_funcs->get_uclk_dpm_states ? (smu)->ppt_funcs->get_uclk_dpm_states((smu), (clocks_in_khz), (num_states)) : 0)
+#define smu_get_max_sustainable_clocks_by_dc(smu, max_clocks) \
+	((smu)->funcs->get_max_sustainable_clocks_by_dc ? (smu)->funcs->get_max_sustainable_clocks_by_dc((smu), (max_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/smu_v11_0.c

@@ -1598,6 +1598,36 @@ static int smu_v11_0_register_irq_handler(struct smu_context *smu)
 	return ret;
 }
 
+static int smu_v11_0_get_max_sustainable_clocks_by_dc(struct smu_context *smu,
+		struct pp_smu_nv_clock_table *max_clocks)
+{
+	struct smu_table_context *table_context = &smu->smu_table;
+	struct smu_11_0_max_sustainable_clocks *sustainable_clocks = NULL;
+
+	if (!max_clocks || !table_context->max_sustainable_clocks)
+		return -EINVAL;
+
+	sustainable_clocks = table_context->max_sustainable_clocks;
+
+	max_clocks->dcfClockInKhz =
+			(unsigned int) sustainable_clocks->dcef_clock * 1000;
+	max_clocks->displayClockInKhz =
+			(unsigned int) sustainable_clocks->display_clock * 1000;
+	max_clocks->phyClockInKhz =
+			(unsigned int) sustainable_clocks->phy_clock * 1000;
+	max_clocks->pixelClockInKhz =
+			(unsigned int) sustainable_clocks->pixel_clock * 1000;
+	max_clocks->uClockInKhz =
+			(unsigned int) sustainable_clocks->uclock * 1000;
+	max_clocks->socClockInKhz =
+			(unsigned int) sustainable_clocks->soc_clock * 1000;
+	max_clocks->dscClockInKhz = 0;
+	max_clocks->dppClockInKhz = 0;
+	max_clocks->fabricClockInKhz = 0;
+
+	return 0;
+}
+
 static int smu_v11_0_set_azalia_d3_pme(struct smu_context *smu)
 {
 	int ret = 0;
@@ -1656,6 +1686,7 @@ static const struct smu_funcs smu_v11_0_funcs = {
 	.gfx_off_control = smu_v11_0_gfx_off_control,
 	.register_irq_handler = smu_v11_0_register_irq_handler,
 	.set_azalia_d3_pme = smu_v11_0_set_azalia_d3_pme,
+	.get_max_sustainable_clocks_by_dc = smu_v11_0_get_max_sustainable_clocks_by_dc,
 };
 
 void smu_v11_0_set_smu_funcs(struct smu_context *smu)