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fbdev: when parsing E-EDID blocks, also use SVD entries

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Add parsing of E-EDID SVD entries. In this first version only a few
CEA/EIA-861E modes are implemented, more can be added as needed.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Guennadi Liakhovetski 2010-11-11 15:45:04 +01:00 committed by Paul Mundt
parent e4105119ac
commit 0ad83f6882
3 changed files with 77 additions and 4 deletions
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37
drivers/video/fbmon.c
View file

@ -983,7 +983,8 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
unsigned char *block;
struct fb_videomode *m;
int num = 0, i;
u8 edt[(128 - 4) / DETAILED_TIMING_DESCRIPTION_SIZE];
u8 svd[64], edt[(128 - 4) / DETAILED_TIMING_DESCRIPTION_SIZE];
u8 pos = 4, svd_n = 0;
if (!edid)
return;
@ -995,6 +996,21 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
edid[2] < 4 || edid[2] > 128 - DETAILED_TIMING_DESCRIPTION_SIZE)
return;
DPRINTK(" Short Video Descriptors\n");
while (pos < edid[2]) {
u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7;
pr_debug("Data block %u of %u bytes\n", type, len);
if (type == 2)
for (i = pos; i < pos + len; i++) {
u8 idx = edid[pos + i] & 0x7f;
svd[svd_n++] = idx;
pr_debug("N%sative mode #%d\n",
edid[pos + i] & 0x80 ? "" : "on-n", idx);
}
pos += len + 1;
}
block = edid + edid[2];
DPRINTK(" Extended Detailed Timings\n");
@ -1005,10 +1021,10 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
edt[num++] = block - edid;
/* Yikes, EDID data is totally useless */
if (!num)
if (!(num + svd_n))
return;
m = kzalloc((specs->modedb_len + num) *
m = kzalloc((specs->modedb_len + num + svd_n) *
sizeof(struct fb_videomode), GFP_KERNEL);
if (!m)
@ -1023,9 +1039,22 @@ void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
pr_debug("Adding %ux%u@%u\n", m[i].xres, m[i].yres, m[i].refresh);
}
for (i = specs->modedb_len + num; i < specs->modedb_len + num + svd_n; i++) {
int idx = svd[i - specs->modedb_len - num];
if (!idx || idx > 63) {
pr_warning("Reserved SVD code %d\n", idx);
} else if (idx > ARRAY_SIZE(cea_modes) || !cea_modes[idx].xres) {
pr_warning("Unimplemented SVD code %d\n", idx);
} else {
memcpy(&m[i], cea_modes + idx, sizeof(m[i]));
pr_debug("Adding SVD #%d: %ux%u@%u\n", idx,
m[i].xres, m[i].yres, m[i].refresh);
}
}
kfree(specs->modedb);
specs->modedb = m;
specs->modedb_len = specs->modedb_len + num;
specs->modedb_len = specs->modedb_len + num + svd_n;
}
/*

43
drivers/video/modedb.c
View file

@ -278,6 +278,49 @@ static const struct fb_videomode modedb[] = {
};
#ifdef CONFIG_FB_MODE_HELPERS
const struct fb_videomode cea_modes[64] = {
/* #1: 640x480p@59.94/60Hz */
[1] = {
NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED, 0,
},
/* #3: 720x480p@59.94/60Hz */
[3] = {
NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0, FB_VMODE_NONINTERLACED, 0,
},
/* #5: 1920x1080i@59.94/60Hz */
[5] = {
NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5, 0, FB_VMODE_INTERLACED, 0,
},
/* #7: 720(1440)x480iH@59.94/60Hz */
[7] = {
NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0, FB_VMODE_INTERLACED, 0,
},
/* #9: 720(1440)x240pH@59.94/60Hz */
[9] = {
NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0, FB_VMODE_NONINTERLACED, 0,
},
/* #18: 720x576pH@50Hz */
[18] = {
NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0, FB_VMODE_NONINTERLACED, 0,
},
/* #19: 1280x720p@50Hz */
[19] = {
NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5, 0, FB_VMODE_NONINTERLACED, 0,
},
/* #20: 1920x1080i@50Hz */
[20] = {
NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5, 0, FB_VMODE_INTERLACED, 0,
},
/* #32: 1920x1080p@23.98/24Hz */
[32] = {
NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5, 0, FB_VMODE_NONINTERLACED, 0,
},
/* #35: (2880)x480p4x@59.94/60Hz */
[35] = {
NULL, 50, 2880, 480, 11100, 240, 64, 30, 9, 248, 6, 0, FB_VMODE_NONINTERLACED, 0,
},
};
const struct fb_videomode vesa_modes[] = {
/* 0 640x350-85 VESA */
{ NULL, 85, 640, 350, 31746, 96, 32, 60, 32, 64, 3,

1
include/linux/fb.h
View file

@ -1151,6 +1151,7 @@ struct fb_videomode {
extern const char *fb_mode_option;
extern const struct fb_videomode vesa_modes[];
extern const struct fb_videomode cea_modes[64];
struct fb_modelist {
struct list_head list;