drivers/gpu/drm/tegra/fbdev.c

Source file repositories/reference/linux-study-clean/drivers/gpu/drm/tegra/fbdev.c

File Facts

System
Linux kernel
Corpus path
drivers/gpu/drm/tegra/fbdev.c
Extension
.c
Size
3817 bytes
Lines
148
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 (!bo->vaddr) {
			dev_err(drm->dev, "failed to vmap() framebuffer\n");
			err = -ENOMEM;
			goto err_drm_client_buffer_delete;
		}
	}

	info->flags |= FBINFO_VIRTFB;
	info->screen_buffer = bo->vaddr;
	info->screen_size = gem->size;
	info->fix.smem_start = (unsigned long)(bo->iova);
	info->fix.smem_len = gem->size;

	/* The handle is only needed for creating the framebuffer. */
	drm_gem_handle_delete(file, handle);

	/* The framebuffer still holds a reference on the GEM object. */
	drm_gem_object_put(gem);

	return 0;

err_drm_client_buffer_delete:
	drm_client_buffer_delete(buffer);
err_drm_gem_handle_delete:
	drm_gem_handle_delete(file, handle);
err_drm_gem_object_put:
	drm_gem_object_put(gem);
	return err;
}

Annotation

Implementation Notes