diff options
Diffstat (limited to 'drivers/video/modedb.c')
| -rw-r--r-- | drivers/video/modedb.c | 62 |
1 files changed, 60 insertions, 2 deletions
diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c index 3edc9f49344b..47516c44a390 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); |
