drivers/gpu/drm/amd/amdgpu/jpeg_v1_0.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/amd/amdgpu/jpeg_v1_0.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/amd/amdgpu/jpeg_v1_0.c
Extension
.c
Size
21423 bytes
Lines
688
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 (type) {
		case PACKETJ_TYPE0:
			if (reg != JPEG_V1_LMI_JPEG_WRITE_64BIT_BAR_HIGH &&
			    reg != JPEG_V1_LMI_JPEG_WRITE_64BIT_BAR_LOW &&
			    reg != JPEG_V1_LMI_JPEG_READ_64BIT_BAR_HIGH &&
			    reg != JPEG_V1_LMI_JPEG_READ_64BIT_BAR_LOW &&
			    reg != JPEG_V1_REG_CTX_INDEX &&
			    reg != JPEG_V1_REG_CTX_DATA) {
				ret = -EINVAL;
			}
			break;
		case PACKETJ_TYPE1:
			if (reg != JPEG_V1_REG_CTX_DATA)
				ret = -EINVAL;
			break;
		case PACKETJ_TYPE3:
			if (reg != JPEG_V1_REG_SOFT_RESET)
				ret = -EINVAL;
			break;
		case PACKETJ_TYPE6:
			if (ib->ptr[i] != CP_PACKETJ_NOP)
				ret = -EINVAL;
			break;
		default:
			ret = -EINVAL;
		}

		if (ret) {
			dev_err(adev->dev, "Invalid packet [0x%08x]!\n", ib->ptr[i]);
			break;
		}
	}

	return ret;
}

Annotation

Implementation Notes