drivers/gpu/drm/radeon/radeon_pm.c

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/radeon_pm.c
Extension
.c
Size
58698 bytes
Lines
1964
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

struct radeon_dpm_quirk {
	u32 chip_vendor;
	u32 chip_device;
	u32 subsys_vendor;
	u32 subsys_device;
};

/* cards with dpm stability problems */
static struct radeon_dpm_quirk radeon_dpm_quirk_list[] = {
	/* TURKS - https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1386534 */
	{ PCI_VENDOR_ID_ATI, 0x6759, 0x1682, 0x3195 },
	/* TURKS - https://bugzilla.kernel.org/show_bug.cgi?id=83731 */
	{ PCI_VENDOR_ID_ATI, 0x6840, 0x1179, 0xfb81 },
	{ 0, 0, 0, 0 },
};

int radeon_pm_init(struct radeon_device *rdev)
{
	struct radeon_dpm_quirk *p = radeon_dpm_quirk_list;
	bool disable_dpm = false;

	/* Apply dpm quirks */
	while (p && p->chip_device != 0) {
		if (rdev->pdev->vendor == p->chip_vendor &&
		    rdev->pdev->device == p->chip_device &&
		    rdev->pdev->subsystem_vendor == p->subsys_vendor &&
		    rdev->pdev->subsystem_device == p->subsys_device) {
			disable_dpm = true;
			break;
		}
		++p;
	}

	/* enable dpm on rv6xx+ */
	switch (rdev->family) {
	case CHIP_RV610:
	case CHIP_RV630:
	case CHIP_RV620:
	case CHIP_RV635:
	case CHIP_RV670:
	case CHIP_RS780:
	case CHIP_RS880:
	case CHIP_RV770:
		/* DPM requires the RLC, RV770+ dGPU requires SMC */
		if (!rdev->rlc_fw)
			rdev->pm.pm_method = PM_METHOD_PROFILE;
		else if ((rdev->family >= CHIP_RV770) &&
			 (!(rdev->flags & RADEON_IS_IGP)) &&
			 (!rdev->smc_fw))
			rdev->pm.pm_method = PM_METHOD_PROFILE;
		else if (radeon_dpm == 1)
			rdev->pm.pm_method = PM_METHOD_DPM;
		else
			rdev->pm.pm_method = PM_METHOD_PROFILE;
		break;
	case CHIP_RV730:
	case CHIP_RV710:
	case CHIP_RV740:
	case CHIP_CEDAR:
	case CHIP_REDWOOD:
	case CHIP_JUNIPER:
	case CHIP_CYPRESS:
	case CHIP_HEMLOCK:
	case CHIP_PALM:
	case CHIP_SUMO:
	case CHIP_SUMO2:
	case CHIP_BARTS:
	case CHIP_TURKS:
	case CHIP_CAICOS:
	case CHIP_CAYMAN:
	case CHIP_ARUBA:
	case CHIP_TAHITI:
	case CHIP_PITCAIRN:
	case CHIP_VERDE:
	case CHIP_OLAND:
	case CHIP_HAINAN:
	case CHIP_BONAIRE:
	case CHIP_KABINI:
	case CHIP_KAVERI:
	case CHIP_HAWAII:
	case CHIP_MULLINS:
		/* DPM requires the RLC, RV770+ dGPU requires SMC */
		if (!rdev->rlc_fw)
			rdev->pm.pm_method = PM_METHOD_PROFILE;
		else if ((rdev->family >= CHIP_RV770) &&
			 (!(rdev->flags & RADEON_IS_IGP)) &&
			 (!rdev->smc_fw))
			rdev->pm.pm_method = PM_METHOD_PROFILE;
		else if (disable_dpm && (radeon_dpm == -1))
			rdev->pm.pm_method = PM_METHOD_PROFILE;

Annotation

Implementation Notes