drivers/gpu/drm/radeon/radeon_atombios.c

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/radeon_atombios.c
Extension
.c
Size
146481 bytes
Lines
4474
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 bios_connector {
	bool valid;
	uint16_t line_mux;
	uint16_t devices;
	int connector_type;
	struct radeon_i2c_bus_rec ddc_bus;
	struct radeon_hpd hpd;
};

bool radeon_get_atom_connector_info_from_supported_devices_table(struct
								 drm_device
								 *dev)
{
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_mode_info *mode_info = &rdev->mode_info;
	struct atom_context *ctx = mode_info->atom_context;
	int index = GetIndexIntoMasterTable(DATA, SupportedDevicesInfo);
	uint16_t size, data_offset;
	uint8_t frev, crev;
	uint16_t device_support;
	uint8_t dac;
	union atom_supported_devices *supported_devices;
	int i, j, max_device;
	struct bios_connector *bios_connectors;
	size_t bc_size = sizeof(*bios_connectors) * ATOM_MAX_SUPPORTED_DEVICE;
	struct radeon_router router;

	router.ddc_valid = false;
	router.cd_valid = false;

	bios_connectors = kzalloc(bc_size, GFP_KERNEL);
	if (!bios_connectors)
		return false;

	if (!atom_parse_data_header(ctx, index, &size, &frev, &crev,
				    &data_offset)) {
		kfree(bios_connectors);
		return false;
	}

	supported_devices =
	    (union atom_supported_devices *)(ctx->bios + data_offset);

	device_support = le16_to_cpu(supported_devices->info.usDeviceSupport);

	if (frev > 1)
		max_device = ATOM_MAX_SUPPORTED_DEVICE;
	else
		max_device = ATOM_MAX_SUPPORTED_DEVICE_INFO;

	for (i = 0; i < max_device; i++) {
		ATOM_CONNECTOR_INFO_I2C ci;

		if (frev > 1)
			ci = supported_devices->info_2d1.asConnInfo[i];
		else
			ci = supported_devices->info.asConnInfo[i];

		bios_connectors[i].valid = false;

		if (!(device_support & (1 << i))) {
			continue;
		}

		if (i == ATOM_DEVICE_CV_INDEX) {
			DRM_DEBUG_KMS("Skipping Component Video\n");
			continue;
		}

		bios_connectors[i].connector_type =
		    supported_devices_connector_convert[ci.sucConnectorInfo.
							sbfAccess.
							bfConnectorType];

		if (bios_connectors[i].connector_type ==
		    DRM_MODE_CONNECTOR_Unknown)
			continue;

		dac = ci.sucConnectorInfo.sbfAccess.bfAssociatedDAC;

		bios_connectors[i].line_mux =
			ci.sucI2cId.ucAccess;

		/* give tv unique connector ids */
		if (i == ATOM_DEVICE_TV1_INDEX) {
			bios_connectors[i].ddc_bus.valid = false;
			bios_connectors[i].line_mux = 50;
		} else if (i == ATOM_DEVICE_TV2_INDEX) {
			bios_connectors[i].ddc_bus.valid = false;
			bios_connectors[i].line_mux = 51;

Annotation

Implementation Notes