2 * Video uclass to support displays (see also vidconsole for text)
4 * Copyright (c) 2015 Google, Inc
10 #include <stdio_dev.h>
15 * struct video_uc_plat - uclass platform data for a video device
17 * This holds information that the uclass needs to know about each device. It
18 * is accessed using dev_get_uclass_plat(dev). See 'Theory of operation' at
19 * the top of video-uclass.c for details on how this information is set.
21 * @align: Frame-buffer alignment, indicating the memory boundary the frame
22 * buffer should start on. If 0, 1MB is assumed
23 * @size: Frame-buffer size, in bytes
24 * @base: Base address of frame buffer, 0 if not yet known
25 * @copy_base: Base address of a hardware copy of the frame buffer. See
27 * @copy_size: Size of copy framebuffer, used if @size is 0
28 * @hide_logo: Hide the logo (used for testing)
30 struct video_uc_plat {
40 VIDEO_ACTIVE_HIGH, /* Pins are active high */
41 VIDEO_ACTIVE_LOW, /* Pins are active low */
45 * Bits per pixel selector. Each value n is such that the bits-per-pixel is
58 * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
59 * brackets to allow multiplication by fractional pixels.
61 #define VNBYTES(bpix) (1 << (bpix)) / 8
63 #define VNBITS(bpix) (1 << (bpix))
73 * struct video_priv - Device information used by the video uclass
75 * @xsize: Number of pixel columns (e.g. 1366)
76 * @ysize: Number of pixels rows (e.g.. 768)
77 * @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.)
78 * @bpix: Encoded bits per pixel (enum video_log2_bpp)
79 * @format: Pixel format (enum video_format)
80 * @vidconsole_drv_name: Driver to use for the text console, NULL to
81 * select automatically
82 * @font_size: Font size in pixels (0 to use a default value)
84 * @fb_size: Frame buffer size
85 * @copy_fb: Copy of the frame buffer to keep up to date; see struct
87 * @line_length: Length of each frame buffer line, in bytes. This can be
88 * set by the driver, but if not, the uclass will set it after
90 * @colour_fg: Foreground colour (pixel value)
91 * @colour_bg: Background colour (pixel value)
92 * @flush_dcache: true to enable flushing of the data cache after
94 * @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
95 * @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
98 /* Things set up by the driver: */
102 enum video_log2_bpp bpix;
103 enum video_format format;
104 const char *vidconsole_drv_name;
108 * Things that are private to the uclass: don't use these in the
123 * struct video_ops - structure for keeping video operations
124 * @video_sync: Synchronize FB with device. Some device like SPI based LCD
125 * displays needs synchronization when data in an FB is available.
126 * For these devices implement video_sync hook to call a sync
127 * function. vid is pointer to video device udevice. Function
128 * should return 0 on success video_sync and error code otherwise
131 int (*video_sync)(struct udevice *vid);
134 #define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops)
136 /** enum colour_idx - the 16 colors supported by consoles */
159 * video_index_to_colour() - convert a color code to a pixel's internal
162 * The caller has to guarantee that the color index is less than
165 * @priv private data of the console device
167 * Return: color value
169 u32 video_index_to_colour(struct video_priv *priv, unsigned int idx);
172 * video_reserve() - Reserve frame-buffer memory for video devices
174 * Note: This function is for internal use.
176 * This uses the uclass plat's @size and @align members to figure out
177 * a size and position for each frame buffer as part of the pre-relocation
178 * process of determining the post-relocation memory layout.
180 * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
181 * is set to the final value.
183 * @addrp: On entry, the top of available memory. On exit, the new top,
184 * after allocating the required memory.
187 int video_reserve(ulong *addrp);
190 * video_clear() - Clear a device's frame buffer to background colour.
192 * @dev: Device to clear
193 * Return: 0 on success
195 int video_clear(struct udevice *dev);
198 * video_fill() - Fill a device's frame buffer to a colour.
200 * @dev: Device to fill
201 * @colour: Colour to use, in the frame buffer's format
202 * Return: 0 on success
204 int video_fill(struct udevice *dev, u32 colour);
207 * video_sync() - Sync a device's frame buffer with its hardware
209 * @vid: Device to sync
210 * @force: True to force a sync even if there was one recently (this is
211 * very expensive on sandbox)
213 * @return: 0 on success, error code otherwise
215 * Some frame buffers are cached or have a secondary frame buffer. This
216 * function syncs these up so that the current contents of the U-Boot frame
217 * buffer are displayed to the user.
219 int video_sync(struct udevice *vid, bool force);
222 * video_sync_all() - Sync all devices' frame buffers with there hardware
224 * This calls video_sync() on all active video devices.
226 void video_sync_all(void);
229 * video_bmp_get_info() - Get information about a bitmap image
231 * @bmp_image: Pointer to BMP image to check
232 * @widthp: Returns width in pixels
233 * @heightp: Returns height in pixels
234 * @bpixp: Returns log2 of bits per pixel
236 void video_bmp_get_info(void *bmp_image, ulong *widthp, ulong *heightp,
240 * video_bmp_display() - Display a BMP file
242 * @dev: Device to display the bitmap on
243 * @bmp_image: Address of bitmap image to display
244 * @x: X position in pixels from the left
245 * @y: Y position in pixels from the top
246 * @align: true to adjust the coordinates to centre the image. If false
247 * the coordinates are used as is. If true:
249 * - if a coordinate is 0x7fff then the image will be centred in
251 * - if a coordinate is -ve then it will be offset to the
252 * left/top of the centre by that many pixels
253 * - if a coordinate is positive it will be used unchanged.
254 * Return: 0 if OK, -ve on error
256 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
260 * video_get_xsize() - Get the width of the display in pixels
262 * @dev: Device to check
263 * Return: device frame buffer width in pixels
265 int video_get_xsize(struct udevice *dev);
268 * video_get_ysize() - Get the height of the display in pixels
270 * @dev: Device to check
271 * Return: device frame buffer height in pixels
273 int video_get_ysize(struct udevice *dev);
276 * Set whether we need to flush the dcache when changing the image. This
279 * @param flush non-zero to flush cache after update, 0 to skip
281 void video_set_flush_dcache(struct udevice *dev, bool flush);
284 * Set default colors and attributes
287 * @invert true to invert colours
289 void video_set_default_colors(struct udevice *dev, bool invert);
292 * video_default_font_height() - Get the default font height
295 * Returns: Default font height in pixels, which depends on which console driver
298 int video_default_font_height(struct udevice *dev);
300 #ifdef CONFIG_VIDEO_COPY
302 * vidconsole_sync_copy() - Sync back to the copy framebuffer
304 * This ensures that the copy framebuffer has the same data as the framebuffer
305 * for a particular region. It should be called after the framebuffer is updated
307 * @from and @to can be in either order. The region between them is synced.
309 * @dev: Vidconsole device being updated
310 * @from: Start/end address within the framebuffer (->fb)
311 * @to: Other address within the frame buffer
312 * Return: 0 if OK, -EFAULT if the start address is before the start of the
315 int video_sync_copy(struct udevice *dev, void *from, void *to);
318 * video_sync_copy_all() - Sync the entire framebuffer to the copy
320 * @dev: Vidconsole device being updated
323 int video_sync_copy_all(struct udevice *dev);
325 static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
330 static inline int video_sync_copy_all(struct udevice *dev)
338 * video_is_active() - Test if one video device it active
340 * Return: true if at least one video device is active, else false.
342 bool video_is_active(void);
345 * video_get_u_boot_logo() - Get a pointer to the U-Boot logo
347 * Returns: Pointer to logo
349 void *video_get_u_boot_logo(void);
352 * bmp_display() - Display BMP (bitmap) data located in memory
354 * @addr: address of the bmp data
355 * @x: Position of bitmap from the left side, in pixels
356 * @y: Position of bitmap from the top, in pixels
358 int bmp_display(ulong addr, int x, int y);