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      1 /* $NetBSD: eldreg.h,v 1.1 2015/03/28 14:09:59 jmcneill Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2011 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. The name of the author may not be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     20  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     21  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     22  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #ifndef _ELDREG_H
     29 #define _ELDREG_H
     30 
     31 #define	ELD_MAX_NBYTES		80	/* version 2; 15 SAD count */
     32 
     33 struct eld_header_block {
     34 	uint8_t flags;			/* ver */
     35 	uint8_t	reserved1;
     36 	uint8_t	baseline_eld_len;	/* dword count */
     37 	uint8_t reserved2;
     38 } __packed;
     39 
     40 struct eld_baseline_block {
     41 	struct eld_header_block	header;
     42 	uint8_t flags[4];		/* cea_edid_ver, mnl,
     43 					 * sad_count, conn_type, s_ai, hdcp,
     44 					 * aud_synch_delay,
     45 					 * rlrc, flrc, rc, rlr, fc, lfe, flr
     46 					 */
     47 	uint64_t port_id;
     48 	uint16_t vendor;
     49 	uint16_t product;
     50 	/* monitor name string, CEA SADs, vendor data ... */
     51 } __packed;
     52 
     53 #define	ELD_VER(block)		(((block)->header.flags >> 3) & 0x1f)
     54 #define	 ELD_VER_2		 0x02
     55 #define	 ELD_VER_UNCONF		 0x1f
     56 #define ELD_CEA_EDID_VER(block)	(((block)->flags[0] >> 5) & 0x07)
     57 #define	 ELD_CEA_EDID_VER_NONE	 0x0
     58 #define	 ELD_CEA_EDID_VER_861	 0x1
     59 #define	 ELD_CEA_EDID_VER_861A	 0x2
     60 #define	 ELD_CEA_EDID_VER_861BCD 0x3
     61 #define	ELD_MNL(block)		(((block)->flags[0] >> 0) & 0x1f)
     62 #define	ELD_SAD_COUNT(block)	(((block)->flags[1] >> 4) & 0x0f)
     63 #define	ELD_CONN_TYPE(block)	(((block)->flags[1] >> 2) & 0x03)
     64 #define	 ELD_CONN_TYPE_HDMI	 0x0
     65 #define	ELD_S_AI(block)		(((block)->flags[1] >> 1) & 0x01)
     66 #define	ELD_HDCP(block)		(((block)->flags[1] >> 0) & 0x01)
     67 #define	ELD_AUDIO_DELAY(block)	((block)->flags[2])
     68 #define	 ELD_AUDIO_DELAY_NONE	 0x00
     69 #define  ELD_AUDIO_DELAY_MS(x)	 ((x) * 2)
     70 #define	 ELD_AUDIO_DELAY_MS_MAX	 500
     71 #define	ELD_SPEAKER(block) 	((block)->flags[3])
     72 #define	 ELD_SPEAKER_RLRC	 0x40
     73 #define	 ELD_SPEAKER_FLRC	 0x20
     74 #define	 ELD_SPEAKER_RC		 0x10
     75 #define	 ELD_SPEAKER_RLR	 0x08
     76 #define	 ELD_SPEAKER_FC		 0x04
     77 #define	 ELD_SPEAKER_LFE	 0x02
     78 #define	 ELD_SPEAKER_FLR	 0x01
     79 
     80 #endif /* !_ELDREG_H */
     81