57 lines
1.1 KiB
C
57 lines
1.1 KiB
C
// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2023 Intel Corporation
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*/
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#include <linux/export.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_eld.h>
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#include "drm_crtc_internal.h"
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/**
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* drm_eld_sad_get - get SAD from ELD to struct cea_sad
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* @eld: ELD buffer
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* @sad_index: SAD index
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* @cta_sad: destination struct cea_sad
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*
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* @return: 0 on success, or negative on errors
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*/
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int drm_eld_sad_get(const u8 *eld, int sad_index, struct cea_sad *cta_sad)
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{
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const u8 *sad;
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if (sad_index >= drm_eld_sad_count(eld))
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return -EINVAL;
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sad = eld + DRM_ELD_CEA_SAD(drm_eld_mnl(eld), sad_index);
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drm_edid_cta_sad_set(cta_sad, sad);
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return 0;
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}
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EXPORT_SYMBOL(drm_eld_sad_get);
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/**
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* drm_eld_sad_set - set SAD to ELD from struct cea_sad
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* @eld: ELD buffer
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* @sad_index: SAD index
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* @cta_sad: source struct cea_sad
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*
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* @return: 0 on success, or negative on errors
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*/
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int drm_eld_sad_set(u8 *eld, int sad_index, const struct cea_sad *cta_sad)
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{
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u8 *sad;
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if (sad_index >= drm_eld_sad_count(eld))
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return -EINVAL;
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sad = eld + DRM_ELD_CEA_SAD(drm_eld_mnl(eld), sad_index);
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drm_edid_cta_sad_get(cta_sad, sad);
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return 0;
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}
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EXPORT_SYMBOL(drm_eld_sad_set);
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