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edid: Add struct and defines for cea681 extension blocks

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Add a struct describing the (fixed) bits of cea681 edid extension blocks,
and defines for accessing various bitfields.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
This commit is contained in:
Hans de Goede 2014-12-20 14:30:27 +01:00
parent e745d064b4
commit d2fabdc71c
1 changed files with 19 additions and 0 deletions
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19
include/edid.h
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@ -230,6 +230,25 @@ struct edid1_info {
unsigned char checksum; unsigned char checksum;
} __attribute__ ((__packed__)); } __attribute__ ((__packed__));
struct edid_cea861_info {
unsigned char extension_tag;
#define EDID_CEA861_EXTENSION_TAG 0x02
unsigned char revision;
unsigned char dtd_offset;
unsigned char dtd_count;
#define EDID_CEA861_SUPPORTS_UNDERSCAN(_x) \
GET_BIT(((_x).dtd_count), 7)
#define EDID_CEA861_SUPPORTS_BASIC_AUDIO(_x) \
GET_BIT(((_x).dtd_count), 6)
#define EDID_CEA861_SUPPORTS_YUV444(_x) \
GET_BIT(((_x).dtd_count), 5)
#define EDID_CEA861_SUPPORTS_YUV422(_x) \
GET_BIT(((_x).dtd_count), 4)
#define EDID_CEA861_DTD_COUNT(_x) \
GET_BITS(((_x).dtd_count), 3, 0)
unsigned char data[124];
} __attribute__ ((__packed__));
/** /**
* Print the EDID info. * Print the EDID info.
* *