81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/* $NetBSD: eldreg.h,v 1.1 2011/02/12 15:15:34 jmcneill Exp $ */
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/*
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* Copyright (c) 2011 Jared D. McNeill <jmcneill@invisible.ca>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _ELDREG_H
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#define _ELDREG_H
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#define ELD_MAX_NBYTES 80 /* version 2; 15 SAD count */
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struct eld_header_block {
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uint8_t flags; /* ver */
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uint8_t reserved1;
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uint8_t baseline_eld_len; /* dword count */
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uint8_t reserved2;
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} __packed;
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struct eld_baseline_block {
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struct eld_header_block header;
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uint8_t flags[4]; /* cea_edid_ver, mnl,
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* sad_count, conn_type, s_ai, hdcp,
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* aud_synch_delay,
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* rlrc, flrc, rc, rlr, fc, lfe, flr
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*/
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uint64_t port_id;
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uint16_t vendor;
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uint16_t product;
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/* monitor name string, CEA SADs, vendor data ... */
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} __packed;
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#define ELD_VER(block) (((block)->header.flags >> 3) & 0x1f)
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#define ELD_VER_2 0x02
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#define ELD_VER_UNCONF 0x1f
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#define ELD_CEA_EDID_VER(block) (((block)->flags[0] >> 5) & 0x07)
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#define ELD_CEA_EDID_VER_NONE 0x0
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#define ELD_CEA_EDID_VER_861 0x1
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#define ELD_CEA_EDID_VER_861A 0x2
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#define ELD_CEA_EDID_VER_861BCD 0x3
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#define ELD_MNL(block) (((block)->flags[0] >> 0) & 0x1f)
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#define ELD_SAD_COUNT(block) (((block)->flags[1] >> 4) & 0x0f)
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#define ELD_CONN_TYPE(block) (((block)->flags[1] >> 2) & 0x03)
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#define ELD_CONN_TYPE_HDMI 0x0
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#define ELD_S_AI(block) (((block)->flags[1] >> 1) & 0x01)
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#define ELD_HDCP(block) (((block)->flags[1] >> 0) & 0x01)
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#define ELD_AUDIO_DELAY(block) ((block)->flags[2])
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#define ELD_AUDIO_DELAY_NONE 0x00
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#define ELD_AUDIO_DELAY_MS(x) ((x) * 2)
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#define ELD_AUDIO_DELAY_MS_MAX 500
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#define ELD_SPEAKER(block) ((block)->flags[3])
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#define ELD_SPEAKER_RLRC 0x40
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#define ELD_SPEAKER_FLRC 0x20
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#define ELD_SPEAKER_RC 0x10
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#define ELD_SPEAKER_RLR 0x08
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#define ELD_SPEAKER_FC 0x04
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#define ELD_SPEAKER_LFE 0x02
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#define ELD_SPEAKER_FLR 0x01
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#endif /* !_ELDREG_H */
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