diff options
Diffstat (limited to 'linux-core/drm_edid.c')
| -rw-r--r-- | linux-core/drm_edid.c | 173 |
1 files changed, 3 insertions, 170 deletions
diff --git a/linux-core/drm_edid.c b/linux-core/drm_edid.c index fcd97d67..b79bc2db 100644 --- a/linux-core/drm_edid.c +++ b/linux-core/drm_edid.c @@ -4,181 +4,14 @@ * * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from * FB layer. + * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com> */ #include <linux/i2c.h> #include <linux/i2c-algo-bit.h> #include "drmP.h" +#include "drm_edid.h" -#define EDID_LENGTH 128 -#define DDC_ADDR 0x50 - -#ifdef BIG_ENDIAN -#error "EDID structure is little endian, need big endian versions" -#endif - -struct est_timings { - u8 t1; - u8 t2; - u8 mfg_rsvd; -} __attribute__((packed)); - -struct std_timing { - u8 hsize; /* need to multiply by 8 then add 248 */ - u8 vfreq:6; /* need to add 60 */ - u8 aspect_ratio:2; /* 00=16:10, 01=4:3, 10=5:4, 11=16:9 */ -} __attribute__((packed)); - -/* If detailed data is pixel timing */ -struct detailed_pixel_timing { - u8 hactive_lo; - u8 hblank_lo; - u8 hblank_hi:4; - u8 hactive_hi:4; - u8 vactive_lo; - u8 vblank_lo; - u8 vblank_hi:4; - u8 vactive_hi:4; - u8 hsync_offset_lo; - u8 hsync_pulse_width_lo; - u8 vsync_pulse_width_lo:4; - u8 vsync_offset_lo:4; - u8 hsync_pulse_width_hi:2; - u8 hsync_offset_hi:2; - u8 vsync_pulse_width_hi:2; - u8 vsync_offset_hi:2; - u8 width_mm_lo; - u8 height_mm_lo; - u8 height_mm_hi:4; - u8 width_mm_hi:4; - u8 hborder; - u8 vborder; - u8 unknown0:1; - u8 vsync_positive:1; - u8 hsync_positive:1; - u8 separate_sync:2; - u8 stereo:1; - u8 unknown6:1; - u8 interlaced:1; -} __attribute__((packed)); - -/* If it's not pixel timing, it'll be one of the below */ -struct detailed_data_string { - u8 str[13]; -} __attribute__((packed)); - -struct detailed_data_monitor_range { - u8 min_vfreq; - u8 max_vfreq; - u8 min_hfreq_khz; - u8 max_hfreq_khz; - u8 pixel_clock_mhz; /* need to multiply by 10 */ - u16 sec_gtf_toggle; /* A000=use above, 20=use below */ /* FIXME: byte order */ - u8 hfreq_start_khz; /* need to multiply by 2 */ - u8 c; /* need to divide by 2 */ - u16 m; /* FIXME: byte order */ - u8 k; - u8 j; /* need to divide by 2 */ -} __attribute__((packed)); - -struct detailed_data_wpindex { - u8 white_y_lo:2; - u8 white_x_lo:2; - u8 pad:4; - u8 white_x_hi; - u8 white_y_hi; - u8 gamma; /* need to divide by 100 then add 1 */ -} __attribute__((packed)); - -struct detailed_data_color_point { - u8 windex1; - u8 wpindex1[3]; - u8 windex2; - u8 wpindex2[3]; -} __attribute__((packed)); - -struct detailed_non_pixel { - u8 pad1; - u8 type; /* ff=serial, fe=string, fd=monitor range, fc=monitor name - fb=color point data, fa=standard timing data, - f9=undefined, f8=mfg. reserved */ - u8 pad2; - union { - struct detailed_data_string str; - struct detailed_data_monitor_range range; - struct detailed_data_wpindex color; - struct std_timing timings[5]; - } data; -} __attribute__((packed)); - -#define EDID_DETAIL_STD_MODES 0xfa -#define EDID_DETAIL_MONITOR_CPDATA 0xfb -#define EDID_DETAIL_MONITOR_NAME 0xfc -#define EDID_DETAIL_MONITOR_RANGE 0xfd -#define EDID_DETAIL_MONITOR_STRING 0xfe -#define EDID_DETAIL_MONITOR_SERIAL 0xff - -struct detailed_timing { - u16 pixel_clock; /* need to multiply by 10 KHz */ /* FIXME: byte order */ - union { - struct detailed_pixel_timing pixel_data; - struct detailed_non_pixel other_data; - } data; -} __attribute__((packed)); - -struct edid { - u8 header[8]; - /* Vendor & product info */ - u16 mfg_id; /* FIXME: byte order */ - u16 prod_code; /* FIXME: byte order */ - u32 serial; /* FIXME: byte order */ - u8 mfg_week; - u8 mfg_year; - /* EDID version */ - u8 version; - u8 revision; - /* Display info: */ - /* input definition */ - u8 serration_vsync:1; - u8 sync_on_green:1; - u8 composite_sync:1; - u8 separate_syncs:1; - u8 blank_to_black:1; - u8 video_level:2; - u8 digital:1; /* bits below must be zero if set */ - u8 width_cm; - u8 height_cm; - u8 gamma; - /* feature support */ - u8 default_gtf:1; - u8 preferred_timing:1; - u8 standard_color:1; - u8 display_type:2; /* 00=mono, 01=rgb, 10=non-rgb, 11=unknown */ - u8 pm_active_off:1; - u8 pm_suspend:1; - u8 pm_standby:1; - /* Color characteristics */ - u8 red_green_lo; - u8 black_white_lo; - u8 red_x; - u8 red_y; - u8 green_x; - u8 green_y; - u8 blue_x; - u8 blue_y; - u8 white_x; - u8 white_y; - /* Est. timings and mfg rsvd timings*/ - struct est_timings established_timings; - /* Standard timings 1-8*/ - struct std_timing standard_timings[8]; - /* Detailing timings 1-4 */ - struct detailed_timing detailed_timings[4]; - /* Number of 128 byte ext. blocks */ - u8 extensions; - /* Checksum */ - u8 checksum; -} __attribute__((packed)); - +/* Valid EDID header has these bytes */ static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 }; /** |