include/display.h

   1 /*
   2  * Copyright 2014 Google Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #ifndef _DISPLAY_H
   8 #define _DISPLAY_H
   9
  10 struct udevice;
  11 struct display_timing;
  12
  13 /**
  14  * Display uclass platform data for each device
  15  *
  16  * @source_id:  ID for the source of the display data, typically a video
  17  * controller
  18  * @src_dev:    Source device providing the video
  19  */
  20 struct display_plat {
  21         int source_id;
  22         struct udevice *src_dev;
  23 };
  24
  25 /**
  26  * display_read_timing() - Read timing information
  27  *
  28  * @dev:        Device to read from
  29  * @return 0 if OK, -ve on error
  30  */
  31 int display_read_timing(struct udevice *dev, struct display_timing *timing);
  32
  33 /**
  34  * display_port_enable() - Enable a display port device
  35  *
  36  * @dev:        Device to enable
  37  * @panel_bpp:  Number of bits per pixel for panel
  38  * @timing:     Display timings
  39  * @return 0 if OK, -ve on error
  40  */
  41 int display_enable(struct udevice *dev, int panel_bpp,
  42                    const struct display_timing *timing);
  43
  44 struct dm_display_ops {
  45         /**
  46          * read_timing() - Read information directly
  47          *
  48          * @dev:        Device to read from
  49          * @timing:     Display timings
  50          * @return 0 if OK, -ve on error
  51          */
  52         int (*read_timing)(struct udevice *dev, struct display_timing *timing);
  53
  54         /**
  55          * read_edid() - Read information from EDID
  56          *
  57          * @dev:        Device to read from
  58          * @buf:        Buffer to read into (should be EDID_SIZE bytes)
  59          * @buf_size:   Buffer size (should be EDID_SIZE)
  60          * @return number of bytes read, <=0 for error
  61          */
  62         int (*read_edid)(struct udevice *dev, u8 *buf, int buf_size);
  63
  64         /**
  65          * enable() - Enable the display port device
  66          *
  67          * @dev:        Device to enable
  68          * @panel_bpp:  Number of bits per pixel for panel
  69          * @timing:     Display timings
  70          * @return 0 if OK, -ve on error
  71          */
  72         int (*enable)(struct udevice *dev, int panel_bpp,
  73                       const struct display_timing *timing);
  74 };
  75
  76 #define display_get_ops(dev)    ((struct dm_display_ops *)(dev)->driver->ops)
  77
  78 #endif