display-uclass.c 1.8 KB

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