/* SPDX-License-Identifier: MIT */ /* * Copyright © 2023 Intel Corporation */ #ifndef __DRM_ELD_H__ #define __DRM_ELD_H__ #include <linux/types.h> struct cea_sad; /* ELD Header Block */ #define DRM_ELD_HEADER_BLOCK_SIZE … #define DRM_ELD_VER … #define DRM_ELD_VER_SHIFT … #define DRM_ELD_VER_MASK … #define DRM_ELD_VER_CEA861D … #define DRM_ELD_VER_CANNED … #define DRM_ELD_BASELINE_ELD_LEN … /* ELD Baseline Block for ELD_Ver == 2 */ #define DRM_ELD_CEA_EDID_VER_MNL … #define DRM_ELD_CEA_EDID_VER_SHIFT … #define DRM_ELD_CEA_EDID_VER_MASK … #define DRM_ELD_CEA_EDID_VER_NONE … #define DRM_ELD_CEA_EDID_VER_CEA861 … #define DRM_ELD_CEA_EDID_VER_CEA861A … #define DRM_ELD_CEA_EDID_VER_CEA861BCD … #define DRM_ELD_MNL_SHIFT … #define DRM_ELD_MNL_MASK … #define DRM_ELD_SAD_COUNT_CONN_TYPE … #define DRM_ELD_SAD_COUNT_SHIFT … #define DRM_ELD_SAD_COUNT_MASK … #define DRM_ELD_CONN_TYPE_SHIFT … #define DRM_ELD_CONN_TYPE_MASK … #define DRM_ELD_CONN_TYPE_HDMI … #define DRM_ELD_CONN_TYPE_DP … #define DRM_ELD_SUPPORTS_AI … #define DRM_ELD_SUPPORTS_HDCP … #define DRM_ELD_AUD_SYNCH_DELAY … #define DRM_ELD_AUD_SYNCH_DELAY_MAX … #define DRM_ELD_SPEAKER … #define DRM_ELD_SPEAKER_MASK … #define DRM_ELD_SPEAKER_RLRC … #define DRM_ELD_SPEAKER_FLRC … #define DRM_ELD_SPEAKER_RC … #define DRM_ELD_SPEAKER_RLR … #define DRM_ELD_SPEAKER_FC … #define DRM_ELD_SPEAKER_LFE … #define DRM_ELD_SPEAKER_FLR … #define DRM_ELD_PORT_ID … #define DRM_ELD_PORT_ID_LEN … #define DRM_ELD_MANUFACTURER_NAME0 … #define DRM_ELD_MANUFACTURER_NAME1 … #define DRM_ELD_PRODUCT_CODE0 … #define DRM_ELD_PRODUCT_CODE1 … #define DRM_ELD_MONITOR_NAME_STRING … #define DRM_ELD_CEA_SAD(mnl, sad) … /** * drm_eld_mnl - Get ELD monitor name length in bytes. * @eld: pointer to an eld memory structure with mnl set */ static inline int drm_eld_mnl(const u8 *eld) { … } int drm_eld_sad_get(const u8 *eld, int sad_index, struct cea_sad *cta_sad); int drm_eld_sad_set(u8 *eld, int sad_index, const struct cea_sad *cta_sad); /** * drm_eld_sad - Get ELD SAD structures. * @eld: pointer to an eld memory structure with sad_count set */ static inline const u8 *drm_eld_sad(const u8 *eld) { … } /** * drm_eld_sad_count - Get ELD SAD count. * @eld: pointer to an eld memory structure with sad_count set */ static inline int drm_eld_sad_count(const u8 *eld) { … } /** * drm_eld_calc_baseline_block_size - Calculate baseline block size in bytes * @eld: pointer to an eld memory structure with mnl and sad_count set * * This is a helper for determining the payload size of the baseline block, in * bytes, for e.g. setting the Baseline_ELD_Len field in the ELD header block. */ static inline int drm_eld_calc_baseline_block_size(const u8 *eld) { … } /** * drm_eld_size - Get ELD size in bytes * @eld: pointer to a complete eld memory structure * * The returned value does not include the vendor block. It's vendor specific, * and comprises of the remaining bytes in the ELD memory buffer after * drm_eld_size() bytes of header and baseline block. * * The returned value is guaranteed to be a multiple of 4. */ static inline int drm_eld_size(const u8 *eld) { … } /** * drm_eld_get_spk_alloc - Get speaker allocation * @eld: pointer to an ELD memory structure * * The returned value is the speakers mask. User has to use %DRM_ELD_SPEAKER * field definitions to identify speakers. */ static inline u8 drm_eld_get_spk_alloc(const u8 *eld) { … } /** * drm_eld_get_conn_type - Get device type hdmi/dp connected * @eld: pointer to an ELD memory structure * * The caller need to use %DRM_ELD_CONN_TYPE_HDMI or %DRM_ELD_CONN_TYPE_DP to * identify the display type connected. */ static inline u8 drm_eld_get_conn_type(const u8 *eld) { … } #endif /* __DRM_ELD_H__ */
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