projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| f415a607 JN |
1 | // SPDX-License-Identifier: MIT |
| 2 | /* | |
| 3 | * Copyright © 2023 Intel Corporation | |
| 4 | */ | |
| 5 | ||
| 4e765920 JN |
6 | #include <linux/export.h> |
| 7 | ||
| f415a607 JN |
8 | #include <drm/drm_edid.h> |
| 9 | #include <drm/drm_eld.h> | |
| 10 | ||
| 4e765920 | 11 | #include "drm_crtc_internal.h" |
| f415a607 JN |
12 | |
| 13 | /** | |
| 14 | * drm_eld_sad_get - get SAD from ELD to struct cea_sad | |
| 15 | * @eld: ELD buffer | |
| 16 | * @sad_index: SAD index | |
| 17 | * @cta_sad: destination struct cea_sad | |
| 18 | * | |
| 19 | * @return: 0 on success, or negative on errors | |
| 20 | */ | |
| 21 | int drm_eld_sad_get(const u8 *eld, int sad_index, struct cea_sad *cta_sad) | |
| 22 | { | |
| 23 | const u8 *sad; | |
| 24 | ||
| 25 | if (sad_index >= drm_eld_sad_count(eld)) | |
| 26 | return -EINVAL; | |
| 27 | ||
| 28 | sad = eld + DRM_ELD_CEA_SAD(drm_eld_mnl(eld), sad_index); | |
| 29 | ||
| 30 | drm_edid_cta_sad_set(cta_sad, sad); | |
| 31 | ||
| 32 | return 0; | |
| 33 | } | |
| 34 | EXPORT_SYMBOL(drm_eld_sad_get); | |
| 35 | ||
| 36 | /** | |
| 37 | * drm_eld_sad_set - set SAD to ELD from struct cea_sad | |
| 38 | * @eld: ELD buffer | |
| 39 | * @sad_index: SAD index | |
| 40 | * @cta_sad: source struct cea_sad | |
| 41 | * | |
| 42 | * @return: 0 on success, or negative on errors | |
| 43 | */ | |
| 44 | int drm_eld_sad_set(u8 *eld, int sad_index, const struct cea_sad *cta_sad) | |
| 45 | { | |
| 46 | u8 *sad; | |
| 47 | ||
| 48 | if (sad_index >= drm_eld_sad_count(eld)) | |
| 49 | return -EINVAL; | |
| 50 | ||
| 51 | sad = eld + DRM_ELD_CEA_SAD(drm_eld_mnl(eld), sad_index); | |
| 52 | ||
| 53 | drm_edid_cta_sad_get(cta_sad, sad); | |
| 54 | ||
| 55 | return 0; | |
| 56 | } | |
| 57 | EXPORT_SYMBOL(drm_eld_sad_set); |