drivers/video/display-uclass.c

   1 /*
   2  * Copyright 2014 Google Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <display.h>
  10 #include <edid.h>
  11 #include <errno.h>
  12
  13 int display_read_edid(struct udevice *dev, u8 *buf, int buf_size)
  14 {
  15         struct dm_display_ops *ops = display_get_ops(dev);
  16
  17         if (!ops || !ops->read_edid)
  18                 return -ENOSYS;
  19         return ops->read_edid(dev, buf, buf_size);
  20 }
  21
  22 int display_enable(struct udevice *dev, int panel_bpp,
  23                         const struct display_timing *timing)
  24 {
  25         struct dm_display_ops *ops = display_get_ops(dev);
  26
  27         if (!ops || !ops->enable)
  28                 return -ENOSYS;
  29         return ops->enable(dev, panel_bpp, timing);
  30 }
  31
  32 int display_read_timing(struct udevice *dev, struct display_timing *timing)
  33 {
  34         struct dm_display_ops *ops = display_get_ops(dev);
  35         int panel_bits_per_colour;
  36         u8 buf[EDID_EXT_SIZE];
  37         int ret;
  38
  39         if (!ops || !ops->read_edid)
  40                 return -ENOSYS;
  41         ret = ops->read_edid(dev, buf, sizeof(buf));
  42         if (ret < 0)
  43                 return ret;
  44
  45         return edid_get_timing(buf, ret, timing, &panel_bits_per_colour);
  46 }
  47
  48 UCLASS_DRIVER(display) = {
  49         .id             = UCLASS_DISPLAY,
  50         .name           = "display",
  51         .per_device_platdata_auto_alloc_size    = sizeof(struct display_plat),
  52 };