2 * Video uclass and legacy implementation
4 * Copyright (c) 2015 Google, Inc
6 * MPC823 Video Controller
7 * =======================
9 * AIRVENT SAM s.p.a - RIMINI(ITALY)
16 #include <stdio_dev.h>
21 * struct video_uc_plat - uclass platform data for a video device
23 * This holds information that the uclass needs to know about each device. It
24 * is accessed using dev_get_uclass_plat(dev). See 'Theory of operation' at
25 * the top of video-uclass.c for details on how this information is set.
27 * @align: Frame-buffer alignment, indicating the memory boundary the frame
28 * buffer should start on. If 0, 1MB is assumed
29 * @size: Frame-buffer size, in bytes
30 * @base: Base address of frame buffer, 0 if not yet known
31 * @copy_base: Base address of a hardware copy of the frame buffer. See
34 struct video_uc_plat {
42 VIDEO_ACTIVE_HIGH, /* Pins are active high */
43 VIDEO_ACTIVE_LOW, /* Pins are active low */
47 * Bits per pixel selector. Each value n is such that the bits-per-pixel is
60 * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
61 * brackets to allow multiplication by fractional pixels.
63 #define VNBYTES(bpix) (1 << (bpix)) / 8
65 #define VNBITS(bpix) (1 << (bpix))
75 * struct video_priv - Device information used by the video uclass
77 * @xsize: Number of pixel columns (e.g. 1366)
78 * @ysize: Number of pixels rows (e.g.. 768)
79 * @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.)
80 * @bpix: Encoded bits per pixel (enum video_log2_bpp)
81 * @format: Pixel format (enum video_format)
82 * @vidconsole_drv_name: Driver to use for the text console, NULL to
83 * select automatically
84 * @font_size: Font size in pixels (0 to use a default value)
86 * @fb_size: Frame buffer size
87 * @copy_fb: Copy of the frame buffer to keep up to date; see struct
89 * @line_length: Length of each frame buffer line, in bytes. This can be
90 * set by the driver, but if not, the uclass will set it after
92 * @colour_fg: Foreground colour (pixel value)
93 * @colour_bg: Background colour (pixel value)
94 * @flush_dcache: true to enable flushing of the data cache after
96 * @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
97 * @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
100 /* Things set up by the driver: */
104 enum video_log2_bpp bpix;
105 enum video_format format;
106 const char *vidconsole_drv_name;
110 * Things that are private to the uclass: don't use these in the
125 * struct video_ops - structure for keeping video operations
126 * @video_sync: Synchronize FB with device. Some device like SPI based LCD
127 * displays needs synchronization when data in an FB is available.
128 * For these devices implement video_sync hook to call a sync
129 * function. vid is pointer to video device udevice. Function
130 * should return 0 on success video_sync and error code otherwise
133 int (*video_sync)(struct udevice *vid);
136 #define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops)
139 * video_reserve() - Reserve frame-buffer memory for video devices
141 * Note: This function is for internal use.
143 * This uses the uclass plat's @size and @align members to figure out
144 * a size and position for each frame buffer as part of the pre-relocation
145 * process of determining the post-relocation memory layout.
147 * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
148 * is set to the final value.
150 * @addrp: On entry, the top of available memory. On exit, the new top,
151 * after allocating the required memory.
154 int video_reserve(ulong *addrp);
156 #ifdef CONFIG_DM_VIDEO
158 * video_clear() - Clear a device's frame buffer to background color.
160 * @dev: Device to clear
163 int video_clear(struct udevice *dev);
164 #endif /* CONFIG_DM_VIDEO */
167 * video_sync() - Sync a device's frame buffer with its hardware
169 * @vid: Device to sync
170 * @force: True to force a sync even if there was one recently (this is
171 * very expensive on sandbox)
173 * @return: 0 on success, error code otherwise
175 * Some frame buffers are cached or have a secondary frame buffer. This
176 * function syncs these up so that the current contents of the U-Boot frame
177 * buffer are displayed to the user.
179 int video_sync(struct udevice *vid, bool force);
182 * video_sync_all() - Sync all devices' frame buffers with there hardware
184 * This calls video_sync() on all active video devices.
186 void video_sync_all(void);
189 * video_bmp_display() - Display a BMP file
191 * @dev: Device to display the bitmap on
192 * @bmp_image: Address of bitmap image to display
193 * @x: X position in pixels from the left
194 * @y: Y position in pixels from the top
195 * @align: true to adjust the coordinates to centre the image. If false
196 * the coordinates are used as is. If true:
198 * - if a coordinate is 0x7fff then the image will be centred in
200 * - if a coordinate is -ve then it will be offset to the
201 * left/top of the centre by that many pixels
202 * - if a coordinate is positive it will be used unchnaged.
203 * @return 0 if OK, -ve on error
205 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
209 * video_get_xsize() - Get the width of the display in pixels
211 * @dev: Device to check
212 * @return device frame buffer width in pixels
214 int video_get_xsize(struct udevice *dev);
217 * video_get_ysize() - Get the height of the display in pixels
219 * @dev: Device to check
220 * @return device frame buffer height in pixels
222 int video_get_ysize(struct udevice *dev);
225 * Set whether we need to flush the dcache when changing the image. This
228 * @param flush non-zero to flush cache after update, 0 to skip
230 void video_set_flush_dcache(struct udevice *dev, bool flush);
233 * Set default colors and attributes
236 * @invert true to invert colours
238 void video_set_default_colors(struct udevice *dev, bool invert);
240 #ifdef CONFIG_VIDEO_COPY
242 * vidconsole_sync_copy() - Sync back to the copy framebuffer
244 * This ensures that the copy framebuffer has the same data as the framebuffer
245 * for a particular region. It should be called after the framebuffer is updated
247 * @from and @to can be in either order. The region between them is synced.
249 * @dev: Vidconsole device being updated
250 * @from: Start/end address within the framebuffer (->fb)
251 * @to: Other address within the frame buffer
252 * @return 0 if OK, -EFAULT if the start address is before the start of the
255 int video_sync_copy(struct udevice *dev, void *from, void *to);
258 * video_sync_copy_all() - Sync the entire framebuffer to the copy
260 * @dev: Vidconsole device being updated
263 int video_sync_copy_all(struct udevice *dev);
265 static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
270 static inline int video_sync_copy_all(struct udevice *dev)
278 * video_is_active() - Test if one video device it active
280 * @return true if at least one video device is active, else false.
282 bool video_is_active(void);
284 #ifndef CONFIG_DM_VIDEO
286 /* Video functions */
289 * Display a BMP format bitmap on the screen
291 * @param bmp_image Address of BMP image
292 * @param x X position to draw image
293 * @param y Y position to draw image
295 int video_display_bitmap(ulong bmp_image, int x, int y);
298 * Get the width of the screen in pixels
300 * @return width of screen in pixels
302 int video_get_pixel_width(void);
305 * Get the height of the screen in pixels
307 * @return height of screen in pixels
309 int video_get_pixel_height(void);
312 * Get the number of text lines/rows on the screen
314 * @return number of rows
316 int video_get_screen_rows(void);
319 * Get the number of text columns on the screen
321 * @return number of columns
323 int video_get_screen_columns(void);
326 * Set the position of the text cursor
328 * @param col Column to place cursor (0 = left side)
329 * @param row Row to place cursor (0 = top line)
331 void video_position_cursor(unsigned col, unsigned row);
333 /* Clear the display */
334 void video_clear(void);
336 #if defined(CONFIG_FORMIKE)
337 int kwh043st20_f01_spi_startup(unsigned int bus, unsigned int cs,
338 unsigned int max_hz, unsigned int spi_mode);
340 #if defined(CONFIG_LG4573)
341 int lg4573_spi_startup(unsigned int bus, unsigned int cs,
342 unsigned int max_hz, unsigned int spi_mode);
346 * video_get_info_str() - obtain a board string: type, speed, etc.
348 * This is called if CONFIG_CONSOLE_EXTRA_INFO is enabled.
350 * line_number: location to place info string beside logo
351 * info: buffer for info string (empty if nothing to display on this
354 void video_get_info_str(int line_number, char *info);
356 #endif /* !CONFIG_DM_VIDEO */