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https://github.com/AsahiLinux/u-boot
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a75cf70d23
The efi_gop driver uses private fields from the video uclass to obtain a
pointer to the frame buffer. Use the platform data instead.
Check the VIDEO_COPY setting to determine which frame buffer to use. Once
the next stage is running (and making use of U-Boot's EFI boot services)
U-Boot does not handle copying from priv->fb to the hardware framebuffer,
so we must allow EFI to write directly to the hardware framebuffer.
We could provide a function to read this, but it seems better to just
document how it works. The original change ignored an explicit comment
in the video.h file ("Things that are private to the uclass: don't use
these in the driver") which is why this was missed when the VIDEO_COPY
feature was added.
Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: 8f661a5b66 ("efi_loader: gop: Expose fb when 32bpp")
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
421 lines
11 KiB
C
421 lines
11 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. If CONFIG_VIDEO_COPY
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* is enabled, this is the software copy, so writes to this will not be
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* visible until vidconsole_sync_copy() is called. If CONFIG_VIDEO_COPY is
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* disabled, this is the hardware framebuffer.
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* @copy_base: Base address of a hardware copy of the frame buffer. If
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* CONFIG_VIDEO_COPY is disabled, this is not used.
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* @copy_size: Size of copy framebuffer, used if @size is 0
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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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ulong copy_size;
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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_RGBA8888,
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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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/**
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* struct video_handoff - video information passed from SPL
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*
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* This is used when video is set up by SPL, to provide the details to U-Boot
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* proper.
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*
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* @fb: Base address of frame buffer, 0 if not yet known
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* @size: Frame-buffer size, in bytes
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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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* @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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* @bpix: Encoded bits per pixel (enum video_log2_bpp)
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*/
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struct video_handoff {
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u64 fb;
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u32 size;
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u16 xsize;
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u16 ysize;
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u32 line_length;
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u8 bpix;
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};
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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 video device (UCLASS_VIDEO)
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* @idx color index (e.g. VID_YELLOW)
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* Return: color value
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*/
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u32 video_index_to_colour(struct video_priv *priv, enum colour_idx 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_fill_part() - Erase a region
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*
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* Erase a rectangle of the display within the given bounds.
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*
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* @dev: Device to update
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* @xstart: X start position in pixels from the left
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* @ystart: Y start position in pixels from the top
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* @xend: X end position in pixels from the left
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* @yend: Y end position in pixels from the top
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* @colour: Value to write
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* Return: 0 if OK, -ENOSYS if the display depth is not supported
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*/
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int video_fill_part(struct udevice *dev, int xstart, int ystart, int xend,
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int yend, 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 their 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 unchanged.
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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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/**
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* video_default_font_height() - Get the default font height
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*
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* @dev: video device
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* Returns: Default font height in pixels, which depends on which console driver
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* is in use
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*/
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int video_default_font_height(struct udevice *dev);
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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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/*
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* bmp_display() - Display BMP (bitmap) data located in memory
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*
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* @addr: address of the bmp data
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* @x: Position of bitmap from the left side, in pixels
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* @y: Position of bitmap from the top, in pixels
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*/
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int bmp_display(ulong addr, int x, int y);
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/*
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* bmp_info() - Show information about bmp file
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*
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* @addr: address of bmp file
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* Returns: 0 if OK, else 1 if bmp image not found
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*/
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int bmp_info(ulong addr);
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/*
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* video_reserve_from_bloblist()- Reserve frame-buffer memory for video devices
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* using blobs.
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*
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* @ho: video information passed from SPL
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* Returns: 0 (always)
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*/
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int video_reserve_from_bloblist(struct video_handoff *ho);
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#endif
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