edid: Add struct and defines for cea681 extension blocks
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>
diff --git a/include/edid.h b/include/edid.h
index a69f43a..18ec1d5 100644
--- a/include/edid.h
+++ b/include/edid.h
@@ -230,6 +230,25 @@
unsigned char checksum;
} __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.
*