833  *	0x15 and 0x16 from the EDID.
834  * @hor_landscape - byte 0x15 from the EDID.
835  * @vert_portrait - byte 0x16 from the EDID.
837  * Determines the aspect ratio from the EDID.
838  * See VESA Enhanced EDID standard, release A, rev 2, section 3.6.2:
1021  * v4l2_num_edid_blocks() - return the number of EDID blocks
1023  * @edid:	pointer to the EDID data
1024  * @max_blocks:	maximum number of supported EDID blocks
1026  * Return: the number of EDID blocks based on the contents of the EDID.
1027  *	   This supports the HDMI Forum EDID Extension Override Data Block.
1029 unsigned int v4l2_num_edid_blocks(const u8 *edid, unsigned int max_blocks)  in v4l2_num_edid_blocks()  argument
1033 	if (!edid || !max_blocks)  in v4l2_num_edid_blocks()
1037 	// first 128-byte block in the EDID.  in v4l2_num_edid_blocks()
1039 	// If there is an HDMI Forum EDID Extension Override Data Block  in v4l2_num_edid_blocks()
1041 	// block of the EDID.  in v4l2_num_edid_blocks()
1042 	blocks = edid[126] + 1;  in v4l2_num_edid_blocks()
1043 	// Check for HDMI Forum EDID Extension Override Data Block  in v4l2_num_edid_blocks()
1044 	if (blocks >= 2 &&	// The EDID must be at least 2 blocks  in v4l2_num_edid_blocks()
1046 	    edid[128] == 2 &&	// The first extension block is type CTA-861  in v4l2_num_edid_blocks()
1047 	    edid[133] == 0x78 && // Identifier for the EEODB  in v4l2_num_edid_blocks()
1048 	    (edid[132] & 0xe0) == 0xe0 && // Tag Code == 7  in v4l2_num_edid_blocks()
1049 	    (edid[132] & 0x1f) >= 2 &&	// Length >= 2  in v4l2_num_edid_blocks()
1050 	    edid[134] > 1)	// Number of extension blocks is sane  in v4l2_num_edid_blocks()
1051 		blocks = edid[134] + 1;  in v4l2_num_edid_blocks()
1059  * @edid:	pointer to the EDID data
1060  * @size:	size in bytes of the EDID data
1062  *		bytes in the EDID will be returned here. This is set to 0
1067 u16 v4l2_get_edid_phys_addr(const u8 *edid, unsigned int size,  in v4l2_get_edid_phys_addr()  argument
1070 	unsigned int loc = cec_get_edid_spa_location(edid, size);  in v4l2_get_edid_phys_addr()
1076 	return (edid[loc] << 8) | edid[loc + 1];  in v4l2_get_edid_phys_addr()
1083  * @edid:	pointer to the EDID data
1084  * @size:	size in bytes of the EDID data
1087  * This function finds the location of the physical address in the EDID
1089  * at the end of the EDID block. It does nothing if the EDID doesn't
1092 void v4l2_set_edid_phys_addr(u8 *edid, unsigned int size, u16 phys_addr)  in v4l2_set_edid_phys_addr()  argument
1094 	unsigned int loc = cec_get_edid_spa_location(edid, size);  in v4l2_set_edid_phys_addr()
1100 	edid[loc] = phys_addr >> 8;  in v4l2_set_edid_phys_addr()
1101 	edid[loc + 1] = phys_addr & 0xff;  in v4l2_set_edid_phys_addr()
1106 		sum += edid[i];  in v4l2_set_edid_phys_addr()
1107 	edid[i] = 256 - sum;  in v4l2_set_edid_phys_addr()
1157  * v4l2_phys_addr_validate() - validate a physical address from an EDID
1163  * This validates a physical address as read from an EDID. If the