drm/amd/pm: add the fine grain tuning function for vangogh

This patch is to add the fine grain tuning function for vangogh.
This function uses the pp_od_clk_voltage sysfs file to configure the min
and max value of gfx clock frequency or restore the default value.

Command guide:
echo "s level value" > pp_od_clk_voltage
"s" - set the sclk frequency
"level" - 0 or 1, "0" represents the min value, "1" represents
the max value
"value" - the target value of sclk frequency, it should be
limited in the safe range
echo "r" > pp_od_clk_voltage
"r" - reset the sclk frequency, restore the default value
instantly
echo "c" > pp_od_clk_voltage
"c" - commit the min and max value of sclk frequency to the system
only after the commit command, the setting target values by "s" command
will take effect.
Example:
1)check the default sclk frequency
$ cat pp_od_clk_voltage
OD_SCLK:
0: 200Mhz
1: 1400Mhz
OD_RANGE:
SCLK: 200MHz 1400MHz
2)use "s" -- set command to configure the min or max sclk frequency
$ echo "s 0 600" > pp_od_clk_voltage
$ echo "s 1 1000" > pp_od_clk_voltage
$ echo "c" > pp_od_clk_voltage
$ cat pp_od_clk_voltage
OD_SCLK:
0: 600Mhz
1: 1000Mhz
OD_RANGE:
SCLK: 200MHz 1400MHz
3)use "r" -- reset command to restore the min and max sclk frequency
$ echo "r" > pp_od_clk_voltage
$ cat pp_od_clk_voltage
OD_SCLK:
0: 200Mhz
1: 1400Mhz
OD_RANGE:
SCLK: 200MHz 1400MHz

Signed-off-by: Xiaojian Du <[e-mail]>
Reviewed-by: Evan Quan <[e-mail]>
Reviewed-by: Huang Rui <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

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

···
 
 	unsigned fan_max_rpm;
 	unsigned manual_fan_speed_rpm;
+
+	uint32_t gfx_default_hard_min_freq;
+	uint32_t gfx_default_soft_max_freq;
+	uint32_t gfx_actual_hard_min_freq;
+	uint32_t gfx_actual_soft_max_freq;
 };
 
 struct i2c_adapter;
···
 	void (*interrupt_work)(struct smu_context *smu);
 	int (*gpo_control)(struct smu_context *smu, bool enablement);
 	int (*gfx_state_change_set)(struct smu_context *smu, uint32_t state);
+	int (*set_fine_grain_gfx_freq_parameters)(struct smu_context *smu);
 };
 
 typedef enum {

drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c

···
 	kfree(smu_table->overdrive_table);
 	kfree(smu_table->max_sustainable_clocks);
 	kfree(smu_table->driver_pptable);
+	kfree(smu_table->clocks_table);
 	smu_table->gpu_metrics_table = NULL;
 	smu_table->boot_overdrive_table = NULL;
 	smu_table->overdrive_table = NULL;
 	smu_table->max_sustainable_clocks = NULL;
 	smu_table->driver_pptable = NULL;
+	smu_table->clocks_table = NULL;
 	kfree(smu_table->hardcode_pptable);
 	smu_table->hardcode_pptable = NULL;
 

drivers/gpu/drm/amd/pm/swsmu/smu11/vangogh_ppt.c

···
 	if (!smu_table->watermarks_table)
 		goto err2_out;
 
+	smu_table->clocks_table = kzalloc(sizeof(DpmClocks_t), GFP_KERNEL);
+	if (!smu_table->clocks_table)
+		goto err3_out;
+
 	return 0;
 
+err3_out:
+	kfree(smu_table->clocks_table);
 err2_out:
 	kfree(smu_table->gpu_metrics_table);
 err1_out:
···
 					   value);
 }
 
+static int vangogh_print_fine_grain_clk(struct smu_context *smu,
+			enum smu_clk_type clk_type, char *buf)
+{
+	int size = 0;
+
+	switch (clk_type) {
+	case SMU_OD_SCLK:
+		if (smu->od_enabled) {
+			size = sprintf(buf, "%s:\n", "OD_SCLK");
+			size += sprintf(buf + size, "0: %10uMhz\n",
+			(smu->gfx_actual_hard_min_freq > 0) ? smu->gfx_actual_hard_min_freq : smu->gfx_default_hard_min_freq);
+			size += sprintf(buf + size, "1: %10uMhz\n",
+			(smu->gfx_actual_soft_max_freq > 0) ? smu->gfx_actual_soft_max_freq : smu->gfx_default_soft_max_freq);
+		}
+		break;
+	case SMU_OD_RANGE:
+		if (smu->od_enabled) {
+			size = sprintf(buf, "%s:\n", "OD_RANGE");
+			size += sprintf(buf + size, "SCLK: %7uMhz %10uMhz\n",
+				smu->gfx_default_hard_min_freq, smu->gfx_default_soft_max_freq);
+		}
+		break;
+	default:
+		break;
+	}
+
+	return size;
+}
+
 static int vangogh_read_sensor(struct smu_context *smu,
 				 enum amd_pp_sensors sensor,
 				 void *data, uint32_t *size)
···
 	return sizeof(struct gpu_metrics_v2_0);
 }
 
+static int vangogh_od_edit_dpm_table(struct smu_context *smu, enum PP_OD_DPM_TABLE_COMMAND type,
+							long input[], uint32_t size)
+{
+	int ret = 0;
+
+	if (!smu->od_enabled) {
+		dev_warn(smu->adev->dev, "Fine grain is not enabled!\n");
+		return -EINVAL;
+	}
+
+	switch (type) {
+	case PP_OD_EDIT_SCLK_VDDC_TABLE:
+		if (size != 2) {
+			dev_err(smu->adev->dev, "Input parameter number not correct\n");
+			return -EINVAL;
+		}
+
+		if (input[0] == 0) {
+			if (input[1] < smu->gfx_default_hard_min_freq) {
+				dev_warn(smu->adev->dev, "Fine grain setting minimun sclk (%ld) MHz is less than the minimum allowed (%d) MHz\n",
+					input[1], smu->gfx_default_hard_min_freq);
+				return -EINVAL;
+			}
+			smu->gfx_actual_hard_min_freq = input[1];
+		} else if (input[0] == 1) {
+			if (input[1] > smu->gfx_default_soft_max_freq) {
+				dev_warn(smu->adev->dev, "Fine grain setting maximun sclk (%ld) MHz is greater than the maximum allowed (%d) MHz\n",
+					input[1], smu->gfx_default_soft_max_freq);
+				return -EINVAL;
+			}
+			smu->gfx_actual_soft_max_freq = input[1];
+		} else {
+			return -EINVAL;
+		}
+		break;
+	case PP_OD_RESTORE_DEFAULT_TABLE:
+		if (size != 0) {
+			dev_err(smu->adev->dev, "Input parameter number not correct\n");
+			return -EINVAL;
+		} else {
+			smu->gfx_actual_hard_min_freq = smu->gfx_default_hard_min_freq;
+			smu->gfx_actual_soft_max_freq = smu->gfx_default_soft_max_freq;
+
+			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinGfxClk,
+									smu->gfx_actual_hard_min_freq, NULL);
+			if (ret) {
+				dev_err(smu->adev->dev, "Restore the default hard min sclk failed!");
+				return ret;
+			}
+
+			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxGfxClk,
+									smu->gfx_actual_soft_max_freq, NULL);
+			if (ret) {
+				dev_err(smu->adev->dev, "Restore the default soft max sclk failed!");
+				return ret;
+			}
+		}
+		break;
+	case PP_OD_COMMIT_DPM_TABLE:
+		if (size != 0) {
+			dev_err(smu->adev->dev, "Input parameter number not correct\n");
+			return -EINVAL;
+		} else {
+			if (smu->gfx_actual_hard_min_freq > smu->gfx_actual_soft_max_freq) {
+				dev_err(smu->adev->dev, "The setting minimun sclk (%d) MHz is greater than the setting maximum sclk (%d) MHz\n",
+				smu->gfx_actual_hard_min_freq, smu->gfx_actual_soft_max_freq);
+				return -EINVAL;
+			}
+
+			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinGfxClk,
+									smu->gfx_actual_hard_min_freq, NULL);
+			if (ret) {
+				dev_err(smu->adev->dev, "Set hard min sclk failed!");
+				return ret;
+			}
+
+			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxGfxClk,
+									smu->gfx_actual_soft_max_freq, NULL);
+			if (ret) {
+				dev_err(smu->adev->dev, "Set soft max sclk failed!");
+				return ret;
+			}
+		}
+		break;
+	default:
+		return -ENOSYS;
+	}
+
+	return ret;
+}
+
+int vangogh_set_default_dpm_tables(struct smu_context *smu)
+{
+	struct smu_table_context *smu_table = &smu->smu_table;
+
+	return smu_cmn_update_table(smu, SMU_TABLE_DPMCLOCKS, 0, smu_table->clocks_table, false);
+}
+
+static int vangogh_set_fine_grain_gfx_freq_parameters(struct smu_context *smu)
+{
+	DpmClocks_t *clk_table = smu->smu_table.clocks_table;
+
+	smu->gfx_default_hard_min_freq = clk_table->MinGfxClk;
+	smu->gfx_default_soft_max_freq = clk_table->MaxGfxClk;
+	smu->gfx_actual_hard_min_freq = 0;
+	smu->gfx_actual_soft_max_freq = 0;
+
+	return 0;
+}
+
 static const struct pptable_funcs vangogh_ppt_funcs = {
 
 	.check_fw_status = smu_v11_0_check_fw_status,
···
 	.disable_all_features_with_exception = smu_cmn_disable_all_features_with_exception,
 	.interrupt_work = smu_v11_0_interrupt_work,
 	.get_gpu_metrics = vangogh_get_gpu_metrics,
+	.od_edit_dpm_table = vangogh_od_edit_dpm_table,
+	.print_clk_levels = vangogh_print_fine_grain_clk,
+	.set_default_dpm_table = vangogh_set_default_dpm_tables,
+	.set_fine_grain_gfx_freq_parameters = vangogh_set_fine_grain_gfx_freq_parameters,
 };
 
 void vangogh_set_ppt_funcs(struct smu_context *smu)

drivers/gpu/drm/amd/pm/swsmu/smu_internal.h

···
 #define smu_get_fan_parameters(smu)					smu_ppt_funcs(get_fan_parameters, 0, smu)
 #define smu_post_init(smu)						smu_ppt_funcs(post_init, 0, smu)
 #define smu_gpo_control(smu, enablement)				smu_ppt_funcs(gpo_control, 0, smu, enablement)
+#define smu_set_fine_grain_gfx_freq_parameters(smu)					smu_ppt_funcs(set_fine_grain_gfx_freq_parameters, 0, smu)
 
 #endif
 #endif