drivers/gpu/drm/radeon/trinity_smc.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/radeon/trinity_smc.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/trinity_smc.c
Extension
.c
Size
3473 bytes
Lines
127
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

if (v == 0xFF) {
			DRM_ERROR("SMC failed to handle the message!\n");
			return -EINVAL;
		} else if (v == 0xFE) {
			DRM_ERROR("Unknown SMC message!\n");
			return -EINVAL;
		}
	}

	return 0;
}

int trinity_dpm_bapm_enable(struct radeon_device *rdev, bool enable)
{
	if (enable)
		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_EnableBAPM);
	else
		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DisableBAPM);
}

int trinity_dpm_config(struct radeon_device *rdev, bool enable)
{
	if (enable)
		WREG32_SMC(SMU_SCRATCH0, 1);
	else
		WREG32_SMC(SMU_SCRATCH0, 0);

	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_Config);
}

int trinity_dpm_force_state(struct radeon_device *rdev, u32 n)
{
	WREG32_SMC(SMU_SCRATCH0, n);

	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_ForceState);
}

int trinity_dpm_n_levels_disabled(struct radeon_device *rdev, u32 n)
{
	WREG32_SMC(SMU_SCRATCH0, n);

	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DPM_N_LevelsDisabled);
}

int trinity_uvd_dpm_config(struct radeon_device *rdev)
{
	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_UVD_DPM_Config);
}

int trinity_dpm_no_forced_level(struct radeon_device *rdev)
{
	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_NoForcedLevel);
}

int trinity_dce_enable_voltage_adjustment(struct radeon_device *rdev,
					  bool enable)
{
	if (enable)
		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_AllowVoltageAdjustment);
	else
		return trinity_notify_message_to_smu(rdev, PPSMC_MSG_DCE_RemoveVoltageAdjustment);
}

int trinity_gfx_dynamic_mgpg_config(struct radeon_device *rdev)
{
	return trinity_notify_message_to_smu(rdev, PPSMC_MSG_PG_SIMD_Config);
}

void trinity_acquire_mutex(struct radeon_device *rdev)
{
	int i;

	WREG32(SMC_INT_REQ, 1);
	for (i = 0; i < rdev->usec_timeout; i++) {
		if ((RREG32(SMC_INT_REQ) & 0xffff) == 1)
			break;
		udelay(1);
	}
}

void trinity_release_mutex(struct radeon_device *rdev)
{
	WREG32(SMC_INT_REQ, 0);
}

Annotation

Implementation Notes