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path: root/drivers/video/modedb.c
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Diffstat (limited to 'drivers/video/modedb.c')
-rw-r--r--drivers/video/modedb.c62
1 files changed, 60 insertions, 2 deletions
diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
index 3edc9f49344..47516c44a39 100644
--- a/drivers/video/modedb.c
+++ b/drivers/video/modedb.c
@@ -456,12 +456,22 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info,
*
* Valid mode specifiers for @mode_option:
*
- * <xres>x<yres>[-<bpp>][@<refresh>] or
+ * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or
* <name>[-<bpp>][@<refresh>]
*
* with <xres>, <yres>, <bpp> and <refresh> decimal numbers and
* <name> a string.
*
+ * If 'M' is present after yres (and before refresh/bpp if present),
+ * the function will compute the timings using VESA(tm) Coordinated
+ * Video Timings (CVT). If 'R' is present after 'M', will compute with
+ * reduced blanking (for flatpanels). If 'i' is present, compute
+ * interlaced mode. If 'm' is present, add margins equal to 1.8%
+ * of xres rounded down to 8 pixels, and 1.8% of yres. The char
+ * 'i' and 'm' must be after 'M' and 'R'. Example:
+ *
+ * 1024x768MR-8@60m - Reduced blank with margins at 60Hz.
+ *
* NOTE: The passed struct @var is _not_ cleared! This allows you
* to supply values for e.g. the grayscale and accel_flags fields.
*
@@ -495,7 +505,7 @@ int fb_find_mode(struct fb_var_screeninfo *var,
unsigned int namelen = strlen(name);
int res_specified = 0, bpp_specified = 0, refresh_specified = 0;
unsigned int xres = 0, yres = 0, bpp = default_bpp, refresh = 0;
- int yres_specified = 0;
+ int yres_specified = 0, cvt = 0, rb = 0, interlace = 0, margins = 0;
u32 best, diff;
for (i = namelen-1; i >= 0; i--) {
@@ -506,6 +516,8 @@ int fb_find_mode(struct fb_var_screeninfo *var,
!yres_specified) {
refresh = my_atoi(&name[i+1]);
refresh_specified = 1;
+ if (cvt || rb)
+ cvt = 0;
} else
goto done;
break;
@@ -514,6 +526,8 @@ int fb_find_mode(struct fb_var_screeninfo *var,
if (!bpp_specified && !yres_specified) {
bpp = my_atoi(&name[i+1]);
bpp_specified = 1;
+ if (cvt || rb)
+ cvt = 0;
} else
goto done;
break;
@@ -526,6 +540,22 @@ int fb_find_mode(struct fb_var_screeninfo *var,
break;
case '0'...'9':
break;
+ case 'M':
+ if (!yres_specified)
+ cvt = 1;
+ break;
+ case 'R':
+ if (!cvt)
+ rb = 1;
+ break;
+ case 'm':
+ if (!cvt)
+ margins = 1;
+ break;
+ case 'i':
+ if (!cvt)
+ interlace = 1;
+ break;
default:
goto done;
}
@@ -535,6 +565,34 @@ int fb_find_mode(struct fb_var_screeninfo *var,
res_specified = 1;
}
done:
+ if (cvt) {
+ struct fb_videomode cvt_mode;
+ int ret;
+
+ DPRINTK("CVT mode %dx%d@%dHz%s%s%s\n", xres, yres,
+ (refresh) ? refresh : 60, (rb) ? " reduced blanking" :
+ "", (margins) ? " with margins" : "", (interlace) ?
+ " interlaced" : "");
+
+ cvt_mode.xres = xres;
+ cvt_mode.yres = yres;
+ cvt_mode.refresh = (refresh) ? refresh : 60;
+
+ if (interlace)
+ cvt_mode.vmode |= FB_VMODE_INTERLACED;
+ else
+ cvt_mode.vmode &= ~FB_VMODE_INTERLACED;
+
+ ret = fb_find_mode_cvt(&cvt_mode, margins, rb);
+
+ if (!ret && !fb_try_mode(var, info, &cvt_mode, bpp)) {
+ DPRINTK("modedb CVT: CVT mode ok\n");
+ return 1;
+ }
+
+ DPRINTK("CVT mode invalid, getting mode from database\n");
+ }
+
DPRINTK("Trying specified video mode%s %ix%i\n",
refresh_specified ? "" : " (ignoring refresh rate)", xres, yres);