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 * @hide_logo: Hide the logo (used for testing)
29 struct video_uc_plat {
38 VIDEO_ACTIVE_HIGH, /* Pins are active high */
39 VIDEO_ACTIVE_LOW, /* Pins are active low */
43 * Bits per pixel selector. Each value n is such that the bits-per-pixel is
56 * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
57 * brackets to allow multiplication by fractional pixels.
59 #define VNBYTES(bpix) (1 << (bpix)) / 8
61 #define VNBITS(bpix) (1 << (bpix))
71 * struct video_priv - Device information used by the video uclass
73 * @xsize: Number of pixel columns (e.g. 1366)
74 * @ysize: Number of pixels rows (e.g.. 768)
75 * @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.)
76 * @bpix: Encoded bits per pixel (enum video_log2_bpp)
77 * @format: Pixel format (enum video_format)
78 * @vidconsole_drv_name: Driver to use for the text console, NULL to
79 * select automatically
80 * @font_size: Font size in pixels (0 to use a default value)
82 * @fb_size: Frame buffer size
83 * @copy_fb: Copy of the frame buffer to keep up to date; see struct
85 * @line_length: Length of each frame buffer line, in bytes. This can be
86 * set by the driver, but if not, the uclass will set it after
88 * @colour_fg: Foreground colour (pixel value)
89 * @colour_bg: Background colour (pixel value)
90 * @flush_dcache: true to enable flushing of the data cache after
92 * @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
93 * @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
96 /* Things set up by the driver: */
100 enum video_log2_bpp bpix;
101 enum video_format format;
102 const char *vidconsole_drv_name;
106 * Things that are private to the uclass: don't use these in the
121 * struct video_ops - structure for keeping video operations
122 * @video_sync: Synchronize FB with device. Some device like SPI based LCD
123 * displays needs synchronization when data in an FB is available.
124 * For these devices implement video_sync hook to call a sync
125 * function. vid is pointer to video device udevice. Function
126 * should return 0 on success video_sync and error code otherwise
129 int (*video_sync)(struct udevice *vid);
132 #define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops)
135 * video_reserve() - Reserve frame-buffer memory for video devices
137 * Note: This function is for internal use.
139 * This uses the uclass plat's @size and @align members to figure out
140 * a size and position for each frame buffer as part of the pre-relocation
141 * process of determining the post-relocation memory layout.
143 * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
144 * is set to the final value.
146 * @addrp: On entry, the top of available memory. On exit, the new top,
147 * after allocating the required memory.
150 int video_reserve(ulong *addrp);
153 * video_clear() - Clear a device's frame buffer to background color.
155 * @dev: Device to clear
158 int video_clear(struct udevice *dev);
161 * video_sync() - Sync a device's frame buffer with its hardware
163 * @vid: Device to sync
164 * @force: True to force a sync even if there was one recently (this is
165 * very expensive on sandbox)
167 * @return: 0 on success, error code otherwise
169 * Some frame buffers are cached or have a secondary frame buffer. This
170 * function syncs these up so that the current contents of the U-Boot frame
171 * buffer are displayed to the user.
173 int video_sync(struct udevice *vid, bool force);
176 * video_sync_all() - Sync all devices' frame buffers with there hardware
178 * This calls video_sync() on all active video devices.
180 void video_sync_all(void);
183 * video_bmp_display() - Display a BMP file
185 * @dev: Device to display the bitmap on
186 * @bmp_image: Address of bitmap image to display
187 * @x: X position in pixels from the left
188 * @y: Y position in pixels from the top
189 * @align: true to adjust the coordinates to centre the image. If false
190 * the coordinates are used as is. If true:
192 * - if a coordinate is 0x7fff then the image will be centred in
194 * - if a coordinate is -ve then it will be offset to the
195 * left/top of the centre by that many pixels
196 * - if a coordinate is positive it will be used unchnaged.
197 * Return: 0 if OK, -ve on error
199 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
203 * video_get_xsize() - Get the width of the display in pixels
205 * @dev: Device to check
206 * Return: device frame buffer width in pixels
208 int video_get_xsize(struct udevice *dev);
211 * video_get_ysize() - Get the height of the display in pixels
213 * @dev: Device to check
214 * Return: device frame buffer height in pixels
216 int video_get_ysize(struct udevice *dev);
219 * Set whether we need to flush the dcache when changing the image. This
222 * @param flush non-zero to flush cache after update, 0 to skip
224 void video_set_flush_dcache(struct udevice *dev, bool flush);
227 * Set default colors and attributes
230 * @invert true to invert colours
232 void video_set_default_colors(struct udevice *dev, bool invert);
234 #ifdef CONFIG_VIDEO_COPY
236 * vidconsole_sync_copy() - Sync back to the copy framebuffer
238 * This ensures that the copy framebuffer has the same data as the framebuffer
239 * for a particular region. It should be called after the framebuffer is updated
241 * @from and @to can be in either order. The region between them is synced.
243 * @dev: Vidconsole device being updated
244 * @from: Start/end address within the framebuffer (->fb)
245 * @to: Other address within the frame buffer
246 * Return: 0 if OK, -EFAULT if the start address is before the start of the
249 int video_sync_copy(struct udevice *dev, void *from, void *to);
252 * video_sync_copy_all() - Sync the entire framebuffer to the copy
254 * @dev: Vidconsole device being updated
257 int video_sync_copy_all(struct udevice *dev);
259 static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
264 static inline int video_sync_copy_all(struct udevice *dev)
272 * video_is_active() - Test if one video device it active
274 * Return: true if at least one video device is active, else false.
276 bool video_is_active(void);