diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/video/fbdev/core/modedb.c | 93 |
1 files changed, 57 insertions, 36 deletions
diff --git a/drivers/video/fbdev/core/modedb.c b/drivers/video/fbdev/core/modedb.c index 2510fa728d77..283d9307df21 100644 --- a/drivers/video/fbdev/core/modedb.c +++ b/drivers/video/fbdev/core/modedb.c @@ -628,45 +628,47 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info, } /** - * fb_find_mode - finds a valid video mode - * @var: frame buffer user defined part of display - * @info: frame buffer info structure - * @mode_option: string video mode to find - * @db: video mode database - * @dbsize: size of @db - * @default_mode: default video mode to fall back to - * @default_bpp: default color depth in bits per pixel + * fb_find_mode - finds a valid video mode + * @var: frame buffer user defined part of display + * @info: frame buffer info structure + * @mode_option: string video mode to find + * @db: video mode database + * @dbsize: size of @db + * @default_mode: default video mode to fall back to + * @default_bpp: default color depth in bits per pixel * - * Finds a suitable video mode, starting with the specified mode - * in @mode_option with fallback to @default_mode. If - * @default_mode fails, all modes in the video mode database will - * be tried. + * Finds a suitable video mode, starting with the specified mode + * in @mode_option with fallback to @default_mode. If + * @default_mode fails, all modes in the video mode database will + * be tried. * - * Valid mode specifiers for @mode_option: + * Valid mode specifiers for @mode_option:: * - * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m] or - * <name>[-<bpp>][@<refresh>] + * <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][p][m] + * + * or :: * - * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and - * <name> a string. + * <name>[-<bpp>][@<refresh>] * - * 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: + * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and + * <name> a string. * - * 1024x768MR-8@60m - Reduced blank with margins at 60Hz. + * 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' or 'p' are present, compute + * interlaced or progressive 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', 'p' and 'm' must be after 'M' and 'R'. Example:: * - * NOTE: The passed struct @var is _not_ cleared! This allows you - * to supply values for e.g. the grayscale and accel_flags fields. + * 1024x768MR-8@60m - Reduced blank with margins at 60Hz. * - * Returns zero for failure, 1 if using specified @mode_option, - * 2 if using specified @mode_option with an ignored refresh rate, - * 3 if default mode is used, 4 if fall back to any valid mode. + * NOTE: The passed struct @var is _not_ cleared! This allows you + * to supply values for e.g. the grayscale and accel_flags fields. * + * Returns zero for failure, 1 if using specified @mode_option, + * 2 if using specified @mode_option with an ignored refresh rate, + * 3 if default mode is used, 4 if fall back to any valid mode. */ int fb_find_mode(struct fb_var_screeninfo *var, @@ -697,7 +699,8 @@ 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, cvt = 0, rb = 0, interlace = 0; + int yres_specified = 0, cvt = 0, rb = 0; + int interlace_specified = 0, interlace = 0; int margins = 0; u32 best, diff, tdiff; @@ -748,9 +751,17 @@ int fb_find_mode(struct fb_var_screeninfo *var, if (!cvt) margins = 1; break; + case 'p': + if (!cvt) { + interlace = 0; + interlace_specified = 1; + } + break; case 'i': - if (!cvt) + if (!cvt) { interlace = 1; + interlace_specified = 1; + } break; default: goto done; @@ -819,11 +830,21 @@ done: if ((name_matches(db[i], name, namelen) || (res_specified && res_matches(db[i], xres, yres))) && !fb_try_mode(var, info, &db[i], bpp)) { - if (refresh_specified && db[i].refresh == refresh) - return 1; + const int db_interlace = (db[i].vmode & + FB_VMODE_INTERLACED ? 1 : 0); + int score = abs(db[i].refresh - refresh); + + if (interlace_specified) + score += abs(db_interlace - interlace); + + if (!interlace_specified || + db_interlace == interlace) + if (refresh_specified && + db[i].refresh == refresh) + return 1; - if (abs(db[i].refresh - refresh) < diff) { - diff = abs(db[i].refresh - refresh); + if (score < diff) { + diff = score; best = i; } } |