drivers/gpu/drm/radeon/r600_hdmi.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/radeon/r600_hdmi.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/radeon/r600_hdmi.c
Extension
.c
Size
15112 bytes
Lines
515
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

switch (radeon_encoder->encoder_id) {
		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_TMDS1:
			if (enable) {
				WREG32_OR(AVIVO_TMDSA_CNTL, AVIVO_TMDSA_CNTL_HDMI_EN);
				hdmi |= HDMI0_STREAM(HDMI0_STREAM_TMDSA);
			} else {
				WREG32_AND(AVIVO_TMDSA_CNTL, ~AVIVO_TMDSA_CNTL_HDMI_EN);
			}
			break;
		case ENCODER_OBJECT_ID_INTERNAL_LVTM1:
			if (enable) {
				WREG32_OR(AVIVO_LVTMA_CNTL, AVIVO_LVTMA_CNTL_HDMI_EN);
				hdmi |= HDMI0_STREAM(HDMI0_STREAM_LVTMA);
			} else {
				WREG32_AND(AVIVO_LVTMA_CNTL, ~AVIVO_LVTMA_CNTL_HDMI_EN);
			}
			break;
		case ENCODER_OBJECT_ID_INTERNAL_DDI:
			if (enable) {
				WREG32_OR(DDIA_CNTL, DDIA_HDMI_EN);
				hdmi |= HDMI0_STREAM(HDMI0_STREAM_DDIA);
			} else {
				WREG32_AND(DDIA_CNTL, ~DDIA_HDMI_EN);
			}
			break;
		case ENCODER_OBJECT_ID_INTERNAL_KLDSCP_DVO1:
			if (enable)
				hdmi |= HDMI0_STREAM(HDMI0_STREAM_DVOA);
			break;
		default:
			dev_err(rdev->dev, "Invalid encoder for HDMI: 0x%X\n",
				radeon_encoder->encoder_id);
			break;
		}
		WREG32(HDMI0_CONTROL + dig->afmt->offset, hdmi);
	}

	if (rdev->irq.installed) {
		/* if irq is available use it */
		/* XXX: shouldn't need this on any asics.  Double check DCE2/3 */
		if (enable)
			radeon_irq_kms_enable_afmt(rdev, dig->afmt->id);
		else
			radeon_irq_kms_disable_afmt(rdev, dig->afmt->id);
	}

	dig->afmt->enabled = enable;

	DRM_DEBUG("%sabling HDMI interface @ 0x%04X for encoder 0x%x\n",
		  enable ? "En" : "Dis", dig->afmt->offset, radeon_encoder->encoder_id);
}

Annotation

Implementation Notes