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igt_kms: add a base edid

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Add a basic edid block that includes several different display modes.

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
This commit is contained in:
Thomas Wood 2014-10-08 14:11:30 +01:00
parent b2ac2642a9
commit 273a06dc9b
2 changed files with 113 additions and 0 deletions
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110
lib/igt_kms.c
View File

@ -35,6 +35,7 @@
#include <stdlib.h>
#include <linux/kd.h>
#include <errno.h>
#include <time.h>
#include <i915_drm.h>
@ -43,6 +44,7 @@
#include "igt_aux.h"
#include "intel_chipset.h"
#include "igt_debugfs.h"
#include "igt_edid.h"
/*
* There hasn't been a release of libdrm containing these #define's yet, so
@ -61,6 +63,114 @@
static char *forced_connectors[MAX_CONNECTORS + 1];
#define VFREQ 60
#define CLOCK 148500
#define HACTIVE 1920
#define HBLANK 280
#define VACTIVE 1080
#define VBLANK 45
#define HOFFSET 88
#define HPULSE 44
#define VOFFSET 4
#define VPULSE 5
#define HSIZE 52
#define VSIZE 30
#define GAMMA(x) (x * 100) - 100
#define MANUFACTURER_ID(a, b, c) (a - '@') << 2 | (b - '@') >> 3, \
(b - '@') << 5 | (c - '@')
#define ab(x, y) (x & 0xff), (y & 0xff), ((x & 0xf00) >> 4) | ((y & 0xf00) >> 8)
#define op(ho, hp, vo, vp) (ho & 0xff), (hp & 0xff), \
((vo & 0xf) << 4) | (vp & 0xf), \
((ho & 0x300) >> 2) | ((hp & 0x300) >> 4) \
| ((vo & 0x30) >> 2) | (vp & 0x30 >> 4)
static unsigned char base_edid[EDID_LENGTH] = {
0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, /* header */
MANUFACTURER_ID('I', 'G', 'T'),
/* product code, serial number, week and year of manufacture */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x03, /* edid version (1.3) */
/* basic display parameters */
/* digital display, maximum horizontal image size, maximum vertical
* image size, gamma, features: RGB 4:4:4, native pixel format and
* refresh rate in descriptor 1 */
0x80, HSIZE, VSIZE, GAMMA(2.20), 0x02,
/* chromaticity coordinates */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* established timings: 640x480 60Hz, 800x600 60Hz, 1024x768 60Hz */
0x21, 0x08, 0x00,
/* standard timings */
0xd1, 0xc0, /* 1920x1080 60Hz */
0x81, 0xc0, /* 1280x720 60Hz */
0x61, 0x40, /* 1024x768 60Hz */
0x45, 0x40, /* 800x600 60Hz */
0x31, 0x40, /* 640x480 60Hz */
0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
/* descriptor 1 (preferred timing) */
(CLOCK / 10) & 0x00ff, ((CLOCK / 10) & 0xff00) >> 8,
ab(HACTIVE, HBLANK), ab(VACTIVE, VBLANK),
op(HOFFSET, HPULSE, VOFFSET, VPULSE),
ab(HSIZE * 10, VSIZE * 10),
0x00, 0x00, 0x00,
/* descriptor 2 (monitor range limits) */
0x00, 0x00, 0x00, 0xfd, 0x00,
VFREQ - 1, VFREQ + 1, /* minimum, maximum vertical field rate */
(CLOCK / (HACTIVE + HBLANK)) - 1, /* minimum horizontal line rate */
(CLOCK / (HACTIVE + HBLANK)) + 1, /* maximum horizontal line rate */
(CLOCK / 10000) + 1, /* maximum pixel clock rate */
0x00, 0x0a, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
/* descriptor 3 (name descriptor) */
0x00, 0x00, 0x00, 0xfc, 0x00, 'I', 'G', 'T', 0x0a,
0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
/* descriptor 4 */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
/* extensions, checksum */
0x00, 0x00
};
/**
* igt_kms_get_base_edid:
*
* Get the base edid block, which includes the following modes:
*
* - 1920x1080 60Hz
* - 1280x720 60Hz
* - 1024x768 60Hz
* - 800x600 60Hz
* - 640x480 60Hz
*
* This can be extended with further features using functions such as
* #kmstest_edid_add_3d.
*
* Returns: a basic edid block
*/
const unsigned char* igt_kms_get_base_edid(void)
{
int i, sum = 0;
struct tm *tm;
time_t t;
/* year of manufacture */
t = time(NULL);
tm = localtime(&t);
base_edid[17] = tm->tm_year - 90;
/* calculate checksum */
for (i = 0; i < 127; i++) {
sum = sum + base_edid[i];
}
base_edid[127] = 256 - sum;
return base_edid;
}
/**
* SECTION:igt_kms
* @short_description: Kernel modesetting support library

3
lib/igt_kms.h
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@ -292,5 +292,8 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
void igt_enable_connectors(void);
void igt_reset_connectors(void);
const unsigned char* igt_kms_get_base_edid(void);
#endif /* __IGT_KMS_H__ */