include/video.h

   1 /*
   2  * Video uclass to support displays (see also vidconsole for text)
   3  *
   4  * Copyright (c) 2015 Google, Inc
   5  */
   6
   7 #ifndef _VIDEO_H_
   8 #define _VIDEO_H_
   9
  10 #include <stdio_dev.h>
  11
  12 struct udevice;
  13
  14 /**
  15  * struct video_uc_plat - uclass platform data for a video device
  16  *
  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.
  20  *
  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. If CONFIG_VIDEO_COPY
  25  *      is enabled, this is the software copy, so writes to this will not be
  26  *      visible until vidconsole_sync_copy() is called. If CONFIG_VIDEO_COPY is
  27  *      disabled, this is the hardware framebuffer.
  28  * @copy_base: Base address of a hardware copy of the frame buffer. If
  29  *      CONFIG_VIDEO_COPY is disabled, this is not used.
  30  * @copy_size: Size of copy framebuffer, used if @size is 0
  31  * @hide_logo: Hide the logo (used for testing)
  32  */
  33 struct video_uc_plat {
  34         uint align;
  35         uint size;
  36         ulong base;
  37         ulong copy_base;
  38         ulong copy_size;
  39         bool hide_logo;
  40 };
  41
  42 enum video_polarity {
  43         VIDEO_ACTIVE_HIGH,      /* Pins are active high */
  44         VIDEO_ACTIVE_LOW,       /* Pins are active low */
  45 };
  46
  47 /*
  48  * Bits per pixel selector. Each value n is such that the bits-per-pixel is
  49  * 2 ^ n
  50  */
  51 enum video_log2_bpp {
  52         VIDEO_BPP1      = 0,
  53         VIDEO_BPP2,
  54         VIDEO_BPP4,
  55         VIDEO_BPP8,
  56         VIDEO_BPP16,
  57         VIDEO_BPP32,
  58 };
  59
  60 /* Convert enum video_log2_bpp to bytes and bits */
  61 #define VNBYTES(bpix)   ((1 << (bpix)) / 8)
  62 #define VNBITS(bpix)    (1 << (bpix))
  63
  64 enum video_format {
  65         VIDEO_UNKNOWN,
  66         VIDEO_RGBA8888,
  67         VIDEO_X8B8G8R8,
  68         VIDEO_X8R8G8B8,
  69         VIDEO_X2R10G10B10,
  70 };
  71
  72 /**
  73  * struct video_priv - Device information used by the video uclass
  74  *
  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.). THis
  78  *              does not affect @xsize and @ysize
  79  * @bpix:       Encoded bits per pixel (enum video_log2_bpp)
  80  * @format:     Pixel format (enum video_format)
  81  * @vidconsole_drv_name:        Driver to use for the text console, NULL to
  82  *              select automatically
  83  * @font_size:  Font size in pixels (0 to use a default value)
  84  * @fb:         Frame buffer
  85  * @fb_size:    Frame buffer size
  86  * @copy_fb:    Copy of the frame buffer to keep up to date; see struct
  87  *              video_uc_plat
  88  * @line_length:        Length of each frame buffer line, in bytes. This can be
  89  *              set by the driver, but if not, the uclass will set it after
  90  *              probing
  91  * @colour_fg:  Foreground colour (pixel value)
  92  * @colour_bg:  Background colour (pixel value)
  93  * @flush_dcache:       true to enable flushing of the data cache after
  94  *              the LCD is updated
  95  * @fg_col_idx: Foreground color code (bit 3 = bold, bit 0-2 = color)
  96  * @bg_col_idx: Background color code (bit 3 = bold, bit 0-2 = color)
  97  * @last_sync:  Monotonic time of last video sync
  98  */
  99 struct video_priv {
 100         /* Things set up by the driver: */
 101         ushort xsize;
 102         ushort ysize;
 103         ushort rot;
 104         enum video_log2_bpp bpix;
 105         enum video_format format;
 106         const char *vidconsole_drv_name;
 107         int font_size;
 108
 109         /*
 110          * Things that are private to the uclass: don't use these in the
 111          * driver
 112          */
 113         void *fb;
 114         int fb_size;
 115         void *copy_fb;
 116         int line_length;
 117         u32 colour_fg;
 118         u32 colour_bg;
 119         bool flush_dcache;
 120         u8 fg_col_idx;
 121         u8 bg_col_idx;
 122         ulong last_sync;
 123 };
 124
 125 /**
 126  * struct video_ops - structure for keeping video operations
 127  * @video_sync: Synchronize FB with device. Some device like SPI based LCD
 128  *              displays needs synchronization when data in an FB is available.
 129  *              For these devices implement video_sync hook to call a sync
 130  *              function. vid is pointer to video device udevice. Function
 131  *              should return 0 on success video_sync and error code otherwise
 132  */
 133 struct video_ops {
 134         int (*video_sync)(struct udevice *vid);
 135 };
 136
 137 #define video_get_ops(dev)        ((struct video_ops *)(dev)->driver->ops)
 138
 139 /**
 140  * struct video_handoff - video information passed from SPL
 141  *
 142  * This is used when video is set up by SPL, to provide the details to U-Boot
 143  * proper.
 144  *
 145  * @fb: Base address of frame buffer, 0 if not yet known
 146  * @size: Frame-buffer size, in bytes
 147  * @xsize:      Number of pixel columns (e.g. 1366)
 148  * @ysize:      Number of pixels rows (e.g.. 768)
 149  * @line_length:        Length of each frame buffer line, in bytes. This can be
 150  *              set by the driver, but if not, the uclass will set it after
 151  *              probing
 152  * @bpix:       Encoded bits per pixel (enum video_log2_bpp)
 153  */
 154 struct video_handoff {
 155         u64 fb;
 156         u32 size;
 157         u16 xsize;
 158         u16 ysize;
 159         u32 line_length;
 160         u8 bpix;
 161 };
 162
 163 /** enum colour_idx - the 16 colors supported by consoles */
 164 enum colour_idx {
 165         VID_BLACK = 0,
 166         VID_RED,
 167         VID_GREEN,
 168         VID_BROWN,
 169         VID_BLUE,
 170         VID_MAGENTA,
 171         VID_CYAN,
 172         VID_LIGHT_GRAY,
 173         VID_GRAY,
 174         VID_LIGHT_RED,
 175         VID_LIGHT_GREEN,
 176         VID_YELLOW,
 177         VID_LIGHT_BLUE,
 178         VID_LIGHT_MAGENTA,
 179         VID_LIGHT_CYAN,
 180         VID_WHITE,
 181         VID_DARK_GREY,
 182
 183         VID_COLOUR_COUNT
 184 };
 185
 186 /**
 187  * video_index_to_colour() - convert a color code to a pixel's internal
 188  * representation
 189  *
 190  * The caller has to guarantee that the color index is less than
 191  * VID_COLOR_COUNT.
 192  *
 193  * @priv        private data of the video device (UCLASS_VIDEO)
 194  * @idx         color index (e.g. VID_YELLOW)
 195  * Return:      color value
 196  */
 197 u32 video_index_to_colour(struct video_priv *priv, enum colour_idx idx);
 198
 199 /**
 200  * video_reserve() - Reserve frame-buffer memory for video devices
 201  *
 202  * Note: This function is for internal use.
 203  *
 204  * This uses the uclass plat's @size and @align members to figure out
 205  * a size and position for each frame buffer as part of the pre-relocation
 206  * process of determining the post-relocation memory layout.
 207  *
 208  * gd->video_top is set to the initial value of *@addrp and gd->video_bottom
 209  * is set to the final value.
 210  *
 211  * @addrp:      On entry, the top of available memory. On exit, the new top,
 212  *              after allocating the required memory.
 213  * Return: 0
 214  */
 215 int video_reserve(ulong *addrp);
 216
 217 /**
 218  * video_clear() - Clear a device's frame buffer to background colour.
 219  *
 220  * @dev:        Device to clear
 221  * Return: 0 on success
 222  */
 223 int video_clear(struct udevice *dev);
 224
 225 /**
 226  * video_fill() - Fill a device's frame buffer to a colour.
 227  *
 228  * @dev:        Device to fill
 229  * @colour:     Colour to use, in the frame buffer's format
 230  * Return: 0 on success
 231  */
 232 int video_fill(struct udevice *dev, u32 colour);
 233
 234 /**
 235  * video_fill_part() - Erase a region
 236  *
 237  * Erase a rectangle of the display within the given bounds.
 238  *
 239  * @dev:        Device to update
 240  * @xstart:     X start position in pixels from the left
 241  * @ystart:     Y start position in pixels from the top
 242  * @xend:       X end position in pixels from the left
 243  * @yend:       Y end position  in pixels from the top
 244  * @colour:     Value to write
 245  * Return: 0 if OK, -ENOSYS if the display depth is not supported
 246  */
 247 int video_fill_part(struct udevice *dev, int xstart, int ystart, int xend,
 248                     int yend, u32 colour);
 249
 250 /**
 251  * video_sync() - Sync a device's frame buffer with its hardware
 252  *
 253  * @vid:        Device to sync
 254  * @force:      True to force a sync even if there was one recently (this is
 255  *              very expensive on sandbox)
 256  *
 257  * @return: 0 on success, error code otherwise
 258  *
 259  * Some frame buffers are cached or have a secondary frame buffer. This
 260  * function syncs these up so that the current contents of the U-Boot frame
 261  * buffer are displayed to the user.
 262  */
 263 int video_sync(struct udevice *vid, bool force);
 264
 265 /**
 266  * video_sync_all() - Sync all devices' frame buffers with their hardware
 267  *
 268  * This calls video_sync() on all active video devices.
 269  */
 270 void video_sync_all(void);
 271
 272 /**
 273  * video_bmp_get_info() - Get information about a bitmap image
 274  *
 275  * @bmp_image: Pointer to BMP image to check
 276  * @widthp: Returns width in pixels
 277  * @heightp: Returns height in pixels
 278  * @bpixp: Returns log2 of bits per pixel
 279  */
 280 void video_bmp_get_info(void *bmp_image, ulong *widthp, ulong *heightp,
 281                         uint *bpixp);
 282
 283 /**
 284  * video_bmp_display() - Display a BMP file
 285  *
 286  * @dev:        Device to display the bitmap on
 287  * @bmp_image:  Address of bitmap image to display
 288  * @x:          X position in pixels from the left
 289  * @y:          Y position in pixels from the top
 290  * @align:      true to adjust the coordinates to centre the image. If false
 291  *              the coordinates are used as is. If true:
 292  *
 293  *              - if a coordinate is 0x7fff then the image will be centred in
 294  *                that direction
 295  *              - if a coordinate is -ve then it will be offset to the
 296  *                left/top of the centre by that many pixels
 297  *              - if a coordinate is positive it will be used unchanged.
 298  * Return: 0 if OK, -ve on error
 299  */
 300 int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
 301                       bool align);
 302
 303 /**
 304  * video_get_xsize() - Get the width of the display in pixels
 305  *
 306  * @dev:        Device to check
 307  * Return: device frame buffer width in pixels
 308  */
 309 int video_get_xsize(struct udevice *dev);
 310
 311 /**
 312  * video_get_ysize() - Get the height of the display in pixels
 313  *
 314  * @dev:        Device to check
 315  * Return: device frame buffer height in pixels
 316  */
 317 int video_get_ysize(struct udevice *dev);
 318
 319 /**
 320  * Set whether we need to flush the dcache when changing the image. This
 321  * defaults to off.
 322  *
 323  * @param flush         non-zero to flush cache after update, 0 to skip
 324  */
 325 void video_set_flush_dcache(struct udevice *dev, bool flush);
 326
 327 /**
 328  * Set default colors and attributes
 329  *
 330  * @dev:        video device
 331  * @invert      true to invert colours
 332  */
 333 void video_set_default_colors(struct udevice *dev, bool invert);
 334
 335 /**
 336  * video_default_font_height() - Get the default font height
 337  *
 338  * @dev:        video device
 339  * Returns: Default font height in pixels, which depends on which console driver
 340  * is in use
 341  */
 342 int video_default_font_height(struct udevice *dev);
 343
 344 #ifdef CONFIG_VIDEO_COPY
 345 /**
 346  * vidconsole_sync_copy() - Sync back to the copy framebuffer
 347  *
 348  * This ensures that the copy framebuffer has the same data as the framebuffer
 349  * for a particular region. It should be called after the framebuffer is updated
 350  *
 351  * @from and @to can be in either order. The region between them is synced.
 352  *
 353  * @dev: Vidconsole device being updated
 354  * @from: Start/end address within the framebuffer (->fb)
 355  * @to: Other address within the frame buffer
 356  * Return: 0 if OK, -EFAULT if the start address is before the start of the
 357  *      frame buffer start
 358  */
 359 int video_sync_copy(struct udevice *dev, void *from, void *to);
 360
 361 /**
 362  * video_sync_copy_all() - Sync the entire framebuffer to the copy
 363  *
 364  * @dev: Vidconsole device being updated
 365  * Return: 0 (always)
 366  */
 367 int video_sync_copy_all(struct udevice *dev);
 368 #else
 369 static inline int video_sync_copy(struct udevice *dev, void *from, void *to)
 370 {
 371         return 0;
 372 }
 373
 374 static inline int video_sync_copy_all(struct udevice *dev)
 375 {
 376         return 0;
 377 }
 378
 379 #endif
 380
 381 /**
 382  * video_is_active() - Test if one video device it active
 383  *
 384  * Return: true if at least one video device is active, else false.
 385  */
 386 bool video_is_active(void);
 387
 388 /**
 389  * video_get_u_boot_logo() - Get a pointer to the U-Boot logo
 390  *
 391  * Returns: Pointer to logo
 392  */
 393 void *video_get_u_boot_logo(void);
 394
 395 /*
 396  * bmp_display() - Display BMP (bitmap) data located in memory
 397  *
 398  * @addr: address of the bmp data
 399  * @x: Position of bitmap from the left side, in pixels
 400  * @y: Position of bitmap from the top, in pixels
 401  */
 402 int bmp_display(ulong addr, int x, int y);
 403
 404 /*
 405  * bmp_info() - Show information about bmp file
 406  *
 407  * @addr: address of bmp file
 408  * Returns: 0 if OK, else 1 if bmp image not found
 409  */
 410 int bmp_info(ulong addr);
 411
 412 /*
 413  * video_reserve_from_bloblist()- Reserve frame-buffer memory for video devices
 414  * using blobs.
 415  *
 416  * @ho: video information passed from SPL
 417  * Returns: 0 (always)
 418  */
 419 int video_reserve_from_bloblist(struct video_handoff *ho);
 420
 421 /**
 422  * video_get_fb() - Get the first framebuffer address
 423  *
 424  * This function does not probe video devices, so can only be used after a video
 425  * device has been activated.
 426  *
 427  * Return: address of the framebuffer of the first video device found, or 0 if
 428  * there is no device
 429  */
 430 ulong video_get_fb(void);
 431
 432 #endif