u-boot/include/video.h
Simon Glass 315e367977 video: Allow a copy framebuffer with pre-allocated fb
At present it is not possible for the video driver to use a pre-allocated
frame buffer (such as is done with EFI) with the copy framebuffer. This
can be useful to speed up the display.

Adjust the implementation so that copy_size can be set to the required
size, with this being allocated if the normal framebuffer size is 0.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-03-13 13:53:01 +01:00

360 lines
9.5 KiB
C

/*
* Video uclass to support displays (see also vidconsole for text)
*
* Copyright (c) 2015 Google, Inc
*/
#ifndef _VIDEO_H_
#define _VIDEO_H_
#include <stdio_dev.h>
struct udevice;
/**
* struct video_uc_plat - uclass platform data for a video device
*
* This holds information that the uclass needs to know about each device. It
* is accessed using dev_get_uclass_plat(dev). See 'Theory of operation' at
* the top of video-uclass.c for details on how this information is set.
*
* @align: Frame-buffer alignment, indicating the memory boundary the frame
* buffer should start on. If 0, 1MB is assumed
* @size: Frame-buffer size, in bytes
* @base: Base address of frame buffer, 0 if not yet known
* @copy_base: Base address of a hardware copy of the frame buffer. See
* CONFIG_VIDEO_COPY.
* @copy_size: Size of copy framebuffer, used if @size is 0
* @hide_logo: Hide the logo (used for testing)
*/
struct video_uc_plat {
uint align;
uint size;
ulong base;
ulong copy_base;
ulong copy_size;
bool hide_logo;
};
enum video_polarity {
VIDEO_ACTIVE_HIGH, /* Pins are active high */
VIDEO_ACTIVE_LOW, /* Pins are active low */
};
/*
* Bits per pixel selector. Each value n is such that the bits-per-pixel is
* 2 ^ n
*/
enum video_log2_bpp {
VIDEO_BPP1 = 0,
VIDEO_BPP2,
VIDEO_BPP4,
VIDEO_BPP8,
VIDEO_BPP16,
VIDEO_BPP32,
};
/*
* Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
* brackets to allow multiplication by fractional pixels.
*/
#define VNBYTES(bpix) (1 << (bpix)) / 8
#define VNBITS(bpix) (1 << (bpix))
enum video_format {
VIDEO_UNKNOWN,
VIDEO_X8B8G8R8,
VIDEO_X8R8G8B8,
VIDEO_X2R10G10B10,
};
/**
* struct video_priv - Device information used by the video uclass
*
* @xsize: Number of pixel columns (e.g. 1366)
* @ysize: Number of pixels rows (e.g.. 768)
* @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.)
* @bpix: Encoded bits per pixel (enum video_log2_bpp)
* @format: Pixel format (enum video_format)
* @vidconsole_drv_name: Driver to use for the text console, NULL to
* select automatically
* @font_size: Font size in pixels (0 to use a default value)
* @fb: Frame buffer
* @fb_size: Frame buffer size
* @copy_fb: Copy of the frame buffer to keep up to date; see struct
* video_uc_plat
* @line_length: Length of each frame buffer line, in bytes. This can be
* set by the driver, but if not, the uclass will set it after
* probing
* @colour_fg: Foreground colour (pixel value)
* @colour_bg: Background colour (pixel value)
* @flush_dcache: true to enable flushing of the data cache after
* the LCD is updated
* @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
* @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
*/
struct video_priv {
/* Things set up by the driver: */
ushort xsize;
ushort ysize;
ushort rot;
enum video_log2_bpp bpix;
enum video_format format;
const char *vidconsole_drv_name;
int font_size;
/*
* Things that are private to the uclass: don't use these in the
* driver
*/
void *fb;
int fb_size;
void *copy_fb;
int line_length;
u32 colour_fg;
u32 colour_bg;
bool flush_dcache;
u8 fg_col_idx;
u8 bg_col_idx;
};
/**
* struct video_ops - structure for keeping video operations
* @video_sync: Synchronize FB with device. Some device like SPI based LCD
* displays needs synchronization when data in an FB is available.
* For these devices implement video_sync hook to call a sync
* function. vid is pointer to video device udevice. Function
* should return 0 on success video_sync and error code otherwise
*/
struct video_ops {
int (*video_sync)(struct udevice *vid);
};
#define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops)
/** enum colour_idx - the 16 colors supported by consoles */
enum colour_idx {
VID_BLACK = 0,
VID_RED,
VID_GREEN,
VID_BROWN,
VID_BLUE,
VID_MAGENTA,
VID_CYAN,
VID_LIGHT_GRAY,
VID_GRAY,
VID_LIGHT_RED,
VID_LIGHT_GREEN,
VID_YELLOW,
VID_LIGHT_BLUE,
VID_LIGHT_MAGENTA,
VID_LIGHT_CYAN,
VID_WHITE,
VID_COLOUR_COUNT
};
/**
* video_index_to_colour() - convert a color code to a pixel's internal
* representation
*
* The caller has to guarantee that the color index is less than
* VID_COLOR_COUNT.
*
* @priv private data of the console device
* @idx color index
* Return: color value
*/
u32 video_index_to_colour(struct video_priv *priv, unsigned int idx);
/**
* video_reserve() - Reserve frame-buffer memory for video devices
*
* Note: This function is for internal use.
*
* This uses the uclass plat's @size and @align members to figure out
* a size and position for each frame buffer as part of the pre-relocation
* process of determining the post-relocation memory layout.
*
* gd->video_top is set to the initial value of *@addrp and gd->video_bottom
* is set to the final value.
*
* @addrp: On entry, the top of available memory. On exit, the new top,
* after allocating the required memory.
* Return: 0
*/
int video_reserve(ulong *addrp);
/**
* video_clear() - Clear a device's frame buffer to background colour.
*
* @dev: Device to clear
* Return: 0 on success
*/
int video_clear(struct udevice *dev);
/**
* video_fill() - Fill a device's frame buffer to a colour.
*
* @dev: Device to fill
* @colour: Colour to use, in the frame buffer's format
* Return: 0 on success
*/
int video_fill(struct udevice *dev, u32 colour);
/**
* video_sync() - Sync a device's frame buffer with its hardware
*
* @vid: Device to sync
* @force: True to force a sync even if there was one recently (this is
* very expensive on sandbox)
*
* @return: 0 on success, error code otherwise
*
* Some frame buffers are cached or have a secondary frame buffer. This
* function syncs these up so that the current contents of the U-Boot frame
* buffer are displayed to the user.
*/
int video_sync(struct udevice *vid, bool force);
/**
* video_sync_all() - Sync all devices' frame buffers with there hardware
*
* This calls video_sync() on all active video devices.
*/
void video_sync_all(void);
/**
* video_bmp_get_info() - Get information about a bitmap image
*
* @bmp_image: Pointer to BMP image to check
* @widthp: Returns width in pixels
* @heightp: Returns height in pixels
* @bpixp: Returns log2 of bits per pixel
*/
void video_bmp_get_info(void *bmp_image, ulong *widthp, ulong *heightp,
uint *bpixp);
/**
* video_bmp_display() - Display a BMP file
*
* @dev: Device to display the bitmap on
* @bmp_image: Address of bitmap image to display
* @x: X position in pixels from the left
* @y: Y position in pixels from the top
* @align: true to adjust the coordinates to centre the image. If false
* the coordinates are used as is. If true:
*
* - if a coordinate is 0x7fff then the image will be centred in
* that direction
* - if a coordinate is -ve then it will be offset to the
* left/top of the centre by that many pixels
* - if a coordinate is positive it will be used unchanged.
* Return: 0 if OK, -ve on error
*/
int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
bool align);
/**
* video_get_xsize() - Get the width of the display in pixels
*
* @dev: Device to check
* Return: device frame buffer width in pixels
*/
int video_get_xsize(struct udevice *dev);
/**
* video_get_ysize() - Get the height of the display in pixels
*
* @dev: Device to check
* Return: device frame buffer height in pixels
*/
int video_get_ysize(struct udevice *dev);
/**
* Set whether we need to flush the dcache when changing the image. This
* defaults to off.
*
* @param flush non-zero to flush cache after update, 0 to skip
*/
void video_set_flush_dcache(struct udevice *dev, bool flush);
/**
* Set default colors and attributes
*
* @dev: video device
* @invert true to invert colours
*/
void video_set_default_colors(struct udevice *dev, bool invert);
/**
* video_default_font_height() - Get the default font height
*
* @dev: video device
* Returns: Default font height in pixels, which depends on which console driver
* is in use
*/
int video_default_font_height(struct udevice *dev);
#ifdef CONFIG_VIDEO_COPY
/**
* vidconsole_sync_copy() - Sync back to the copy framebuffer
*
* This ensures that the copy framebuffer has the same data as the framebuffer
* for a particular region. It should be called after the framebuffer is updated
*
* @from and @to can be in either order. The region between them is synced.
*
* @dev: Vidconsole device being updated
* @from: Start/end address within the framebuffer (->fb)
* @to: Other address within the frame buffer
* Return: 0 if OK, -EFAULT if the start address is before the start of the
* frame buffer start
*/
int video_sync_copy(struct udevice *dev, void *from, void *to);
/**
* video_sync_copy_all() - Sync the entire framebuffer to the copy
*
* @dev: Vidconsole device being updated
* Return: 0 (always)
*/
int video_sync_copy_all(struct udevice *dev);
#else
static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
{
return 0;
}
static inline int video_sync_copy_all(struct udevice *dev)
{
return 0;
}
#endif
/**
* video_is_active() - Test if one video device it active
*
* Return: true if at least one video device is active, else false.
*/
bool video_is_active(void);
/**
* video_get_u_boot_logo() - Get a pointer to the U-Boot logo
*
* Returns: Pointer to logo
*/
void *video_get_u_boot_logo(void);
/*
* bmp_display() - Display BMP (bitmap) data located in memory
*
* @addr: address of the bmp data
* @x: Position of bitmap from the left side, in pixels
* @y: Position of bitmap from the top, in pixels
*/
int bmp_display(ulong addr, int x, int y);
#endif