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1// SPDX-License-Identifier: MIT2/*3 * Copyright © 2023 Intel Corporation4 */5 6#include <linux/export.h>7 8#include <drm/drm_edid.h>9#include <drm/drm_eld.h>10 11#include "drm_crtc_internal.h"12 13/**14 * drm_eld_sad_get - get SAD from ELD to struct cea_sad15 * @eld: ELD buffer16 * @sad_index: SAD index17 * @cta_sad: destination struct cea_sad18 *19 * @return: 0 on success, or negative on errors20 */21int 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}34EXPORT_SYMBOL(drm_eld_sad_get);35 36/**37 * drm_eld_sad_set - set SAD to ELD from struct cea_sad38 * @eld: ELD buffer39 * @sad_index: SAD index40 * @cta_sad: source struct cea_sad41 *42 * @return: 0 on success, or negative on errors43 */44int 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}57EXPORT_SYMBOL(drm_eld_sad_set);58