drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_powertune.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_powertune.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega20_powertune.c
Extension
.c
Size
2482 bytes
Lines
73
Domain
Driver Families
Bucket
drivers/gpu
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include "hwmgr.h"
#include "vega20_hwmgr.h"
#include "vega20_powertune.h"
#include "vega20_smumgr.h"
#include "vega20_ppsmc.h"
#include "vega20_inc.h"
#include "pp_debug.h"

int vega20_set_power_limit(struct pp_hwmgr *hwmgr, uint32_t n)
{
	struct vega20_hwmgr *data =
			(struct vega20_hwmgr *)(hwmgr->backend);

	if (data->smu_features[GNLD_PPT].enabled)
		return smum_send_msg_to_smc_with_parameter(hwmgr,
				PPSMC_MSG_SetPptLimit, n,
				NULL);

	return 0;
}

int vega20_validate_power_level_request(struct pp_hwmgr *hwmgr,
		uint32_t tdp_percentage_adjustment, uint32_t tdp_absolute_value_adjustment)
{
	return (tdp_percentage_adjustment > hwmgr->platform_descriptor.TDPLimit) ? -1 : 0;
}

static int vega20_set_overdrive_target_percentage(struct pp_hwmgr *hwmgr,
		uint32_t adjust_percent)
{
	return smum_send_msg_to_smc_with_parameter(hwmgr,
			PPSMC_MSG_OverDriveSetPercentage, adjust_percent,
			NULL);
}

int vega20_power_control_set_level(struct pp_hwmgr *hwmgr)
{
	int adjust_percent, result = 0;

	if (PP_CAP(PHM_PlatformCaps_PowerContainment)) {
		adjust_percent =
				hwmgr->platform_descriptor.TDPAdjustmentPolarity ?
				hwmgr->platform_descriptor.TDPAdjustment :
				(-1 * hwmgr->platform_descriptor.TDPAdjustment);
		result = vega20_set_overdrive_target_percentage(hwmgr,
				(uint32_t)adjust_percent);
	}
	return result;
}

Annotation

Implementation Notes