drivers/gpu/drm/radeon/atombios_crtc.c

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

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/atombios_crtc.c
Extension
.c
Size
72138 bytes
Lines
2229
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 (a1 > a2) {
			args.usOverscanLeft = cpu_to_le16((adjusted_mode->crtc_hdisplay - (a2 / mode->crtc_vdisplay)) / 2);
			args.usOverscanRight = cpu_to_le16((adjusted_mode->crtc_hdisplay - (a2 / mode->crtc_vdisplay)) / 2);
		} else if (a2 > a1) {
			args.usOverscanTop = cpu_to_le16((adjusted_mode->crtc_vdisplay - (a1 / mode->crtc_hdisplay)) / 2);
			args.usOverscanBottom = cpu_to_le16((adjusted_mode->crtc_vdisplay - (a1 / mode->crtc_hdisplay)) / 2);
		}
		break;
	case RMX_FULL:
	default:
		args.usOverscanRight = cpu_to_le16(radeon_crtc->h_border);
		args.usOverscanLeft = cpu_to_le16(radeon_crtc->h_border);
		args.usOverscanBottom = cpu_to_le16(radeon_crtc->v_border);
		args.usOverscanTop = cpu_to_le16(radeon_crtc->v_border);
		break;
	}
	atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args, sizeof(args));
}

static void atombios_scaler_setup(struct drm_crtc *crtc)
{
	struct drm_device *dev = crtc->dev;
	struct radeon_device *rdev = dev->dev_private;
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	ENABLE_SCALER_PS_ALLOCATION args;
	int index = GetIndexIntoMasterTable(COMMAND, EnableScaler);
	struct radeon_encoder *radeon_encoder =
		to_radeon_encoder(radeon_crtc->encoder);
	/* fixme - fill in enc_priv for atom dac */
	enum radeon_tv_std tv_std = TV_STD_NTSC;
	bool is_tv = false, is_cv = false;

	if (!ASIC_IS_AVIVO(rdev) && radeon_crtc->crtc_id)
		return;

	if (radeon_encoder->active_device & ATOM_DEVICE_TV_SUPPORT) {
		struct radeon_encoder_atom_dac *tv_dac = radeon_encoder->enc_priv;
		tv_std = tv_dac->tv_std;
		is_tv = true;
	}

	memset(&args, 0, sizeof(args));

	args.ucScaler = radeon_crtc->crtc_id;

	if (is_tv) {
		switch (tv_std) {
		case TV_STD_NTSC:
		default:
			args.ucTVStandard = ATOM_TV_NTSC;
			break;
		case TV_STD_PAL:
			args.ucTVStandard = ATOM_TV_PAL;
			break;
		case TV_STD_PAL_M:
			args.ucTVStandard = ATOM_TV_PALM;
			break;
		case TV_STD_PAL_60:
			args.ucTVStandard = ATOM_TV_PAL60;
			break;
		case TV_STD_NTSC_J:
			args.ucTVStandard = ATOM_TV_NTSCJ;
			break;
		case TV_STD_SCART_PAL:
			args.ucTVStandard = ATOM_TV_PAL; /* ??? */
			break;
		case TV_STD_SECAM:
			args.ucTVStandard = ATOM_TV_SECAM;
			break;
		case TV_STD_PAL_CN:
			args.ucTVStandard = ATOM_TV_PALCN;
			break;
		}
		args.ucEnable = SCALER_ENABLE_MULTITAP_MODE;
	} else if (is_cv) {
		args.ucTVStandard = ATOM_TV_CV;
		args.ucEnable = SCALER_ENABLE_MULTITAP_MODE;
	} else {
		switch (radeon_crtc->rmx_type) {
		case RMX_FULL:
			args.ucEnable = ATOM_SCALER_EXPANSION;
			break;
		case RMX_CENTER:
			args.ucEnable = ATOM_SCALER_CENTER;
			break;
		case RMX_ASPECT:
			args.ucEnable = ATOM_SCALER_EXPANSION;
			break;
		default:
			if (ASIC_IS_AVIVO(rdev))

Annotation

Implementation Notes