From 00cf1167bb8f7c08825262ee83e77274ff034f0a Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Tue, 14 Apr 2015 21:03:37 -0600 Subject: edid: Add a function to read detailed monitor timings For digital displays (such as EDP LCDs) we would like to read the EDID information and use that to set display timings. Provide a function to do this. Signed-off-by: Simon Glass Signed-off-by: Tom Warren --- include/edid.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'include/edid.h') diff --git a/include/edid.h b/include/edid.h index 18ec1d5..88b4b7d 100644 --- a/include/edid.h +++ b/include/edid.h @@ -15,6 +15,9 @@ #include +/* Size of the EDID data */ +#define EDID_SIZE 128 + #define GET_BIT(_x, _pos) \ (((_x) >> (_pos)) & 1) #define GET_BITS(_x, _pos_msb, _pos_lsb) \ @@ -287,4 +290,20 @@ int edid_get_ranges(struct edid1_info *edid, unsigned int *hmin, unsigned int *hmax, unsigned int *vmin, unsigned int *vmax); +struct display_timing; + +/** + * edid_get_timing() - Get basic digital display parameters + * + * @param buf Buffer containing EDID data + * @param buf_size Size of buffer in bytes + * @param timing Place to put preferring timing information + * @param panel_bits_per_colourp Place to put the number of bits per + * colour supported by the panel. This will be set to + * -1 if not available + * @return 0 if timings are OK, -ve on error + */ +int edid_get_timing(u8 *buf, int buf_size, struct display_timing *timing, + int *panel_bits_per_colourp); + #endif /* __EDID_H_ */ -- cgit v1.1