e90322f87c
This is useful for some other users, so break this out into a function. Signed-off-by: Simon Glass <sjg@chromium.org>
341 lines
9.0 KiB
C
341 lines
9.0 KiB
C
/*
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* Video uclass to support displays (see also vidconsole for text)
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*
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* Copyright (c) 2015 Google, Inc
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*/
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#ifndef _VIDEO_H_
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#define _VIDEO_H_
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#include <stdio_dev.h>
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struct udevice;
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/**
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* struct video_uc_plat - uclass platform data for a video device
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*
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* This holds information that the uclass needs to know about each device. It
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* is accessed using dev_get_uclass_plat(dev). See 'Theory of operation' at
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* the top of video-uclass.c for details on how this information is set.
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*
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* @align: Frame-buffer alignment, indicating the memory boundary the frame
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* buffer should start on. If 0, 1MB is assumed
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* @size: Frame-buffer size, in bytes
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* @base: Base address of frame buffer, 0 if not yet known
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* @copy_base: Base address of a hardware copy of the frame buffer. See
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* CONFIG_VIDEO_COPY.
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* @hide_logo: Hide the logo (used for testing)
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*/
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struct video_uc_plat {
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uint align;
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uint size;
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ulong base;
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ulong copy_base;
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bool hide_logo;
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};
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enum video_polarity {
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VIDEO_ACTIVE_HIGH, /* Pins are active high */
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VIDEO_ACTIVE_LOW, /* Pins are active low */
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};
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/*
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* Bits per pixel selector. Each value n is such that the bits-per-pixel is
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* 2 ^ n
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*/
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enum video_log2_bpp {
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VIDEO_BPP1 = 0,
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VIDEO_BPP2,
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VIDEO_BPP4,
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VIDEO_BPP8,
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VIDEO_BPP16,
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VIDEO_BPP32,
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};
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/*
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* Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
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* brackets to allow multiplication by fractional pixels.
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*/
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#define VNBYTES(bpix) (1 << (bpix)) / 8
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#define VNBITS(bpix) (1 << (bpix))
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enum video_format {
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VIDEO_UNKNOWN,
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VIDEO_X8B8G8R8,
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VIDEO_X8R8G8B8,
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VIDEO_X2R10G10B10,
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};
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/**
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* struct video_priv - Device information used by the video uclass
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*
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* @xsize: Number of pixel columns (e.g. 1366)
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* @ysize: Number of pixels rows (e.g.. 768)
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* @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.)
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* @bpix: Encoded bits per pixel (enum video_log2_bpp)
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* @format: Pixel format (enum video_format)
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* @vidconsole_drv_name: Driver to use for the text console, NULL to
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* select automatically
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* @font_size: Font size in pixels (0 to use a default value)
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* @fb: Frame buffer
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* @fb_size: Frame buffer size
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* @copy_fb: Copy of the frame buffer to keep up to date; see struct
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* video_uc_plat
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* @line_length: Length of each frame buffer line, in bytes. This can be
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* set by the driver, but if not, the uclass will set it after
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* probing
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* @colour_fg: Foreground colour (pixel value)
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* @colour_bg: Background colour (pixel value)
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* @flush_dcache: true to enable flushing of the data cache after
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* the LCD is updated
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* @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
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* @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
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*/
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struct video_priv {
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/* Things set up by the driver: */
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ushort xsize;
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ushort ysize;
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ushort rot;
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enum video_log2_bpp bpix;
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enum video_format format;
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const char *vidconsole_drv_name;
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int font_size;
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/*
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* Things that are private to the uclass: don't use these in the
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* driver
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*/
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void *fb;
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int fb_size;
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void *copy_fb;
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int line_length;
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u32 colour_fg;
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u32 colour_bg;
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bool flush_dcache;
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u8 fg_col_idx;
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u8 bg_col_idx;
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};
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/**
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* struct video_ops - structure for keeping video operations
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* @video_sync: Synchronize FB with device. Some device like SPI based LCD
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* displays needs synchronization when data in an FB is available.
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* For these devices implement video_sync hook to call a sync
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* function. vid is pointer to video device udevice. Function
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* should return 0 on success video_sync and error code otherwise
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*/
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struct video_ops {
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int (*video_sync)(struct udevice *vid);
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};
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#define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops)
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/** enum colour_idx - the 16 colors supported by consoles */
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enum colour_idx {
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VID_BLACK = 0,
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VID_RED,
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VID_GREEN,
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VID_BROWN,
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VID_BLUE,
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VID_MAGENTA,
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VID_CYAN,
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VID_LIGHT_GRAY,
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VID_GRAY,
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VID_LIGHT_RED,
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VID_LIGHT_GREEN,
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VID_YELLOW,
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VID_LIGHT_BLUE,
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VID_LIGHT_MAGENTA,
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VID_LIGHT_CYAN,
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VID_WHITE,
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VID_COLOUR_COUNT
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};
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/**
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* video_index_to_colour() - convert a color code to a pixel's internal
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* representation
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*
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* The caller has to guarantee that the color index is less than
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* VID_COLOR_COUNT.
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*
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* @priv private data of the console device
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* @idx color index
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* Return: color value
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*/
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u32 video_index_to_colour(struct video_priv *priv, unsigned int idx);
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/**
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* video_reserve() - Reserve frame-buffer memory for video devices
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*
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* Note: This function is for internal use.
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*
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* This uses the uclass plat's @size and @align members to figure out
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* a size and position for each frame buffer as part of the pre-relocation
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* process of determining the post-relocation memory layout.
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*
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* gd->video_top is set to the initial value of *@addrp and gd->video_bottom
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* is set to the final value.
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*
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* @addrp: On entry, the top of available memory. On exit, the new top,
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* after allocating the required memory.
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* Return: 0
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*/
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int video_reserve(ulong *addrp);
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/**
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* video_clear() - Clear a device's frame buffer to background colour.
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*
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* @dev: Device to clear
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* Return: 0 on success
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*/
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int video_clear(struct udevice *dev);
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/**
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* video_fill() - Fill a device's frame buffer to a colour.
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*
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* @dev: Device to fill
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* @colour: Colour to use, in the frame buffer's format
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* Return: 0 on success
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*/
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int video_fill(struct udevice *dev, u32 colour);
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/**
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* video_sync() - Sync a device's frame buffer with its hardware
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*
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* @vid: Device to sync
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* @force: True to force a sync even if there was one recently (this is
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* very expensive on sandbox)
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*
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* @return: 0 on success, error code otherwise
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*
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* Some frame buffers are cached or have a secondary frame buffer. This
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* function syncs these up so that the current contents of the U-Boot frame
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* buffer are displayed to the user.
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*/
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int video_sync(struct udevice *vid, bool force);
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/**
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* video_sync_all() - Sync all devices' frame buffers with there hardware
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*
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* This calls video_sync() on all active video devices.
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*/
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void video_sync_all(void);
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/**
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* video_bmp_get_info() - Get information about a bitmap image
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*
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* @bmp_image: Pointer to BMP image to check
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* @widthp: Returns width in pixels
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* @heightp: Returns height in pixels
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* @bpixp: Returns log2 of bits per pixel
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*/
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void video_bmp_get_info(void *bmp_image, ulong *widthp, ulong *heightp,
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uint *bpixp);
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/**
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* video_bmp_display() - Display a BMP file
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*
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* @dev: Device to display the bitmap on
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* @bmp_image: Address of bitmap image to display
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* @x: X position in pixels from the left
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* @y: Y position in pixels from the top
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* @align: true to adjust the coordinates to centre the image. If false
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* the coordinates are used as is. If true:
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*
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* - if a coordinate is 0x7fff then the image will be centred in
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* that direction
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* - if a coordinate is -ve then it will be offset to the
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* left/top of the centre by that many pixels
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* - if a coordinate is positive it will be used unchnaged.
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* Return: 0 if OK, -ve on error
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*/
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int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
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bool align);
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/**
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* video_get_xsize() - Get the width of the display in pixels
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*
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* @dev: Device to check
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* Return: device frame buffer width in pixels
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*/
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int video_get_xsize(struct udevice *dev);
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/**
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* video_get_ysize() - Get the height of the display in pixels
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*
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* @dev: Device to check
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* Return: device frame buffer height in pixels
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*/
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int video_get_ysize(struct udevice *dev);
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/**
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* Set whether we need to flush the dcache when changing the image. This
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* defaults to off.
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*
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* @param flush non-zero to flush cache after update, 0 to skip
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*/
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void video_set_flush_dcache(struct udevice *dev, bool flush);
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/**
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* Set default colors and attributes
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*
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* @dev: video device
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* @invert true to invert colours
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*/
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void video_set_default_colors(struct udevice *dev, bool invert);
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#ifdef CONFIG_VIDEO_COPY
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/**
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* vidconsole_sync_copy() - Sync back to the copy framebuffer
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*
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* This ensures that the copy framebuffer has the same data as the framebuffer
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* for a particular region. It should be called after the framebuffer is updated
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*
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* @from and @to can be in either order. The region between them is synced.
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*
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* @dev: Vidconsole device being updated
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* @from: Start/end address within the framebuffer (->fb)
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* @to: Other address within the frame buffer
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* Return: 0 if OK, -EFAULT if the start address is before the start of the
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* frame buffer start
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*/
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int video_sync_copy(struct udevice *dev, void *from, void *to);
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/**
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* video_sync_copy_all() - Sync the entire framebuffer to the copy
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*
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* @dev: Vidconsole device being updated
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* Return: 0 (always)
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*/
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int video_sync_copy_all(struct udevice *dev);
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#else
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static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
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{
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return 0;
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}
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static inline int video_sync_copy_all(struct udevice *dev)
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{
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return 0;
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}
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#endif
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/**
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* video_is_active() - Test if one video device it active
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*
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* Return: true if at least one video device is active, else false.
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*/
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bool video_is_active(void);
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/**
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* video_get_u_boot_logo() - Get a pointer to the U-Boot logo
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*
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* Returns: Pointer to logo
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*/
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void *video_get_u_boot_logo(void);
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#endif
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