drm_scanout_buffer Struct Reference

#include <drm_panic.h>

Collaboration diagram for drm_scanout_buffer:

Public Attributes
const struct drm_format_info *	format
struct iosys_map	map [DRM_FORMAT_MAX_PLANES]
struct page **	pages
unsigned int	width
unsigned int	height
unsigned int	pitch [DRM_FORMAT_MAX_PLANES]
void(*	set_pixel )(struct drm_scanout_buffer *sb, unsigned int x, unsigned int y, u32 color)

Detailed Description

struct drm_scanout_buffer - DRM scanout buffer

This structure holds the information necessary for drm_panic to draw the panic screen, and display it.

Member Data Documentation

format

const struct drm_format_info* drm_scanout_buffer::format

@format:

drm format of the scanout buffer.

height

unsigned int drm_scanout_buffer::height

@height: Height of the scanout buffer, in pixels.

map

struct iosys_map drm_scanout_buffer::map[DRM_FORMAT_MAX_PLANES]

@map:

Virtual address of the scanout buffer, either in memory or iomem. The scanout buffer should be in linear format, and can be directly sent to the display hardware. Tearing is not an issue for the panic screen.

pages

struct page** drm_scanout_buffer::pages

@pages: Optional, if the scanout buffer is not mapped, set this field to the array of pages of the scanout buffer. The panic code will use kmap_local_page_try_from_panic() to map one page at a time to write all the pixels. This array shouldn't be allocated from the get_scanoutbuffer() callback. The scanout buffer should be in linear format.

pitch

unsigned int drm_scanout_buffer::pitch[DRM_FORMAT_MAX_PLANES]

@pitch: Length in bytes between the start of two consecutive lines.

set_pixel

void(* drm_scanout_buffer::set_pixel) (struct drm_scanout_buffer *sb, unsigned int x, unsigned int y, u32 color)

@set_pixel: Optional function, to set a pixel color on the framebuffer. It allows to handle special tiling format inside the driver. It takes precedence over the @map and @pages fields.

width

unsigned int drm_scanout_buffer::width

@width: Width of the scanout buffer, in pixels.

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The documentation for this struct was generated from the following file:

• XenevaOS/BaseHdr/drm/drm_panic.h