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
33 * @hide_logo: Hide the logo (used for testing)
35 struct video_uc_plat {
44 VIDEO_ACTIVE_HIGH, /* Pins are active high */
45 VIDEO_ACTIVE_LOW, /* Pins are active low */
49 * Bits per pixel selector. Each value n is such that the bits-per-pixel is
62 * Convert enum video_log2_bpp to bytes and bits. Note we omit the outer
63 * brackets to allow multiplication by fractional pixels.
65 #define VNBYTES(bpix) (1 << (bpix)) / 8
67 #define VNBITS(bpix) (1 << (bpix))
77 * struct video_priv - Device information used by the video uclass
79 * @xsize: Number of pixel columns (e.g. 1366)
80 * @ysize: Number of pixels rows (e.g.. 768)
81 * @rot: Display rotation (0=none, 1=90 degrees clockwise, etc.)
82 * @bpix: Encoded bits per pixel (enum video_log2_bpp)
83 * @format: Pixel format (enum video_format)
84 * @vidconsole_drv_name: Driver to use for the text console, NULL to
85 * select automatically
86 * @font_size: Font size in pixels (0 to use a default value)
88 * @fb_size: Frame buffer size
89 * @copy_fb: Copy of the frame buffer to keep up to date; see struct
91 * @line_length: Length of each frame buffer line, in bytes. This can be
92 * set by the driver, but if not, the uclass will set it after
94 * @colour_fg: Foreground colour (pixel value)
95 * @colour_bg: Background colour (pixel value)
96 * @flush_dcache: true to enable flushing of the data cache after
98 * @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
99 * @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
102 /* Things set up by the driver: */
106 enum video_log2_bpp bpix;
107 enum video_format format;
108 const char *vidconsole_drv_name;
112 * Things that are private to the uclass: don't use these in the
127 * struct video_ops - structure for keeping video operations
128 * @video_sync: Synchronize FB with device. Some device like SPI based LCD
129 * displays needs synchronization when data in an FB is available.
130 * For these devices implement video_sync hook to call a sync
131 * function. vid is pointer to video device udevice. Function
132 * should return 0 on success video_sync and error code otherwise
135 int (*video_sync)(struct udevice *vid);
138 #define video_get_ops(dev) ((struct video_ops *)(dev)->driver->ops)
141 * video_reserve() - Reserve frame-buffer memory for video devices
143 * Note: This function is for internal use.
145 * This uses the uclass plat's @size and @align members to figure out
146 * a size and position for each frame buffer as part of the pre-relocation
147 * process of determining the post-relocation memory layout.
149 * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
150 * is set to the final value.
152 * @addrp: On entry, the top of available memory. On exit, the new top,
153 * after allocating the required memory.
156 int video_reserve(ulong *addrp);
158 #ifdef CONFIG_DM_VIDEO
160 * video_clear() - Clear a device's frame buffer to background color.
162 * @dev: Device to clear
165 int video_clear(struct udevice *dev);
166 #endif /* CONFIG_DM_VIDEO */
169 * video_sync() - Sync a device's frame buffer with its hardware
171 * @vid: Device to sync
172 * @force: True to force a sync even if there was one recently (this is
173 * very expensive on sandbox)
175 * @return: 0 on success, error code otherwise
177 * Some frame buffers are cached or have a secondary frame buffer. This
178 * function syncs these up so that the current contents of the U-Boot frame
179 * buffer are displayed to the user.
181 int video_sync(struct udevice *vid, bool force);
184 * video_sync_all() - Sync all devices' frame buffers with there hardware
186 * This calls video_sync() on all active video devices.
188 void video_sync_all(void);
191 * video_bmp_display() - Display a BMP file
193 * @dev: Device to display the bitmap on
194 * @bmp_image: Address of bitmap image to display
195 * @x: X position in pixels from the left
196 * @y: Y position in pixels from the top
197 * @align: true to adjust the coordinates to centre the image. If false
198 * the coordinates are used as is. If true:
200 * - if a coordinate is 0x7fff then the image will be centred in
202 * - if a coordinate is -ve then it will be offset to the
203 * left/top of the centre by that many pixels
204 * - if a coordinate is positive it will be used unchnaged.
205 * @return 0 if OK, -ve on error
207 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
211 * video_get_xsize() - Get the width of the display in pixels
213 * @dev: Device to check
214 * @return device frame buffer width in pixels
216 int video_get_xsize(struct udevice *dev);
219 * video_get_ysize() - Get the height of the display in pixels
221 * @dev: Device to check
222 * @return device frame buffer height in pixels
224 int video_get_ysize(struct udevice *dev);
227 * Set whether we need to flush the dcache when changing the image. This
230 * @param flush non-zero to flush cache after update, 0 to skip
232 void video_set_flush_dcache(struct udevice *dev, bool flush);
235 * Set default colors and attributes
238 * @invert true to invert colours
240 void video_set_default_colors(struct udevice *dev, bool invert);
242 #ifdef CONFIG_VIDEO_COPY
244 * vidconsole_sync_copy() - Sync back to the copy framebuffer
246 * This ensures that the copy framebuffer has the same data as the framebuffer
247 * for a particular region. It should be called after the framebuffer is updated
249 * @from and @to can be in either order. The region between them is synced.
251 * @dev: Vidconsole device being updated
252 * @from: Start/end address within the framebuffer (->fb)
253 * @to: Other address within the frame buffer
254 * @return 0 if OK, -EFAULT if the start address is before the start of the
257 int video_sync_copy(struct udevice *dev, void *from, void *to);
260 * video_sync_copy_all() - Sync the entire framebuffer to the copy
262 * @dev: Vidconsole device being updated
265 int video_sync_copy_all(struct udevice *dev);
267 static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
272 static inline int video_sync_copy_all(struct udevice *dev)
280 * video_is_active() - Test if one video device it active
282 * @return true if at least one video device is active, else false.
284 bool video_is_active(void);
286 #ifndef CONFIG_DM_VIDEO
288 /* Video functions */
291 * Display a BMP format bitmap on the screen
293 * @param bmp_image Address of BMP image
294 * @param x X position to draw image
295 * @param y Y position to draw image
297 int video_display_bitmap(ulong bmp_image, int x, int y);
300 * Get the width of the screen in pixels
302 * @return width of screen in pixels
304 int video_get_pixel_width(void);
307 * Get the height of the screen in pixels
309 * @return height of screen in pixels
311 int video_get_pixel_height(void);
314 * Get the number of text lines/rows on the screen
316 * @return number of rows
318 int video_get_screen_rows(void);
321 * Get the number of text columns on the screen
323 * @return number of columns
325 int video_get_screen_columns(void);
328 * Set the position of the text cursor
330 * @param col Column to place cursor (0 = left side)
331 * @param row Row to place cursor (0 = top line)
333 void video_position_cursor(unsigned col, unsigned row);
335 /* Clear the display */
336 void video_clear(void);
338 #if defined(CONFIG_FORMIKE)
339 int kwh043st20_f01_spi_startup(unsigned int bus, unsigned int cs,
340 unsigned int max_hz, unsigned int spi_mode);
342 #if defined(CONFIG_LG4573)
343 int lg4573_spi_startup(unsigned int bus, unsigned int cs,
344 unsigned int max_hz, unsigned int spi_mode);
348 * video_get_info_str() - obtain a board string: type, speed, etc.
350 * This is called if CONFIG_CONSOLE_EXTRA_INFO is enabled.
352 * line_number: location to place info string beside logo
353 * info: buffer for info string (empty if nothing to display on this
356 void video_get_info_str(int line_number, char *info);
358 #endif /* !CONFIG_DM_VIDEO */