drivers/video/display-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2014 Google Inc.
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <display.h>
   9 #include <edid.h>
  10 #include <errno.h>
  11
  12 int display_read_edid(struct udevice *dev, u8 *buf, int buf_size)
  13 {
  14         struct dm_display_ops *ops = display_get_ops(dev);
  15
  16         if (!ops || !ops->read_edid)
  17                 return -ENOSYS;
  18         return ops->read_edid(dev, buf, buf_size);
  19 }
  20
  21 int display_enable(struct udevice *dev, int panel_bpp,
  22                         const struct display_timing *timing)
  23 {
  24         struct dm_display_ops *ops = display_get_ops(dev);
  25         struct display_plat *disp_uc_plat;
  26         int ret;
  27
  28         if (!ops || !ops->enable)
  29                 return -ENOSYS;
  30         ret = ops->enable(dev, panel_bpp, timing);
  31         if (ret)
  32                 return ret;
  33
  34         disp_uc_plat = dev_get_uclass_platdata(dev);
  35         disp_uc_plat->in_use = true;
  36
  37         return 0;
  38 }
  39
  40 int display_read_timing(struct udevice *dev, struct display_timing *timing)
  41 {
  42         struct dm_display_ops *ops = display_get_ops(dev);
  43         int panel_bits_per_colour;
  44         u8 buf[EDID_EXT_SIZE];
  45         int ret;
  46
  47         if (ops && ops->read_timing)
  48                 return ops->read_timing(dev, timing);
  49
  50         if (!ops || !ops->read_edid)
  51                 return -ENOSYS;
  52         ret = ops->read_edid(dev, buf, sizeof(buf));
  53         if (ret < 0)
  54                 return ret;
  55
  56         return edid_get_timing(buf, ret, timing, &panel_bits_per_colour);
  57 }
  58
  59 bool display_in_use(struct udevice *dev)
  60 {
  61         struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev);
  62
  63         return disp_uc_plat->in_use;
  64 }
  65
  66 UCLASS_DRIVER(display) = {
  67         .id             = UCLASS_DISPLAY,
  68         .name           = "display",
  69         .per_device_platdata_auto_alloc_size    = sizeof(struct display_plat),
  70 };