diff options
| -rw-r--r-- | drivers/video/modedb.c | 444 |
1 files changed, 225 insertions, 219 deletions
diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c index cb175fe7abc0..a9a907c440d7 100644 --- a/drivers/video/modedb.c +++ b/drivers/video/modedb.c @@ -491,55 +491,56 @@ EXPORT_SYMBOL(vesa_modes); static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info, const struct fb_videomode *mode, unsigned int bpp) { - int err = 0; - - DPRINTK("Trying mode %s %dx%d-%d@%d\n", mode->name ? mode->name : "noname", - mode->xres, mode->yres, bpp, mode->refresh); - var->xres = mode->xres; - var->yres = mode->yres; - var->xres_virtual = mode->xres; - var->yres_virtual = mode->yres; - var->xoffset = 0; - var->yoffset = 0; - var->bits_per_pixel = bpp; - var->activate |= FB_ACTIVATE_TEST; - var->pixclock = mode->pixclock; - var->left_margin = mode->left_margin; - var->right_margin = mode->right_margin; - var->upper_margin = mode->upper_margin; - var->lower_margin = mode->lower_margin; - var->hsync_len = mode->hsync_len; - var->vsync_len = mode->vsync_len; - var->sync = mode->sync; - var->vmode = mode->vmode; - if (info->fbops->fb_check_var) - err = info->fbops->fb_check_var(var, info); - var->activate &= ~FB_ACTIVATE_TEST; - return err; + int err = 0; + + DPRINTK("Trying mode %s %dx%d-%d@%d\n", + mode->name ? mode->name : "noname", + mode->xres, mode->yres, bpp, mode->refresh); + var->xres = mode->xres; + var->yres = mode->yres; + var->xres_virtual = mode->xres; + var->yres_virtual = mode->yres; + var->xoffset = 0; + var->yoffset = 0; + var->bits_per_pixel = bpp; + var->activate |= FB_ACTIVATE_TEST; + var->pixclock = mode->pixclock; + var->left_margin = mode->left_margin; + var->right_margin = mode->right_margin; + var->upper_margin = mode->upper_margin; + var->lower_margin = mode->lower_margin; + var->hsync_len = mode->hsync_len; + var->vsync_len = mode->vsync_len; + var->sync = mode->sync; + var->vmode = mode->vmode; + if (info->fbops->fb_check_var) + err = info->fbops->fb_check_var(var, info); + var->activate &= ~FB_ACTIVATE_TEST; + return err; } /** - * 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][m] or + * <name>[-<bpp>][@<refresh>] * - * with <xres>, <yres>, <bpp> and <refresh> decimal numbers and - * <name> a string. + * 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 @@ -551,12 +552,12 @@ static int fb_try_mode(struct fb_var_screeninfo *var, struct fb_info *info, * * 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. + * 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. + * 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. * */ @@ -566,198 +567,203 @@ int fb_find_mode(struct fb_var_screeninfo *var, const struct fb_videomode *default_mode, unsigned int default_bpp) { - int i; - - /* Set up defaults */ - if (!db) { - db = modedb; - dbsize = ARRAY_SIZE(modedb); - } - - if (!default_mode) - default_mode = &db[0]; - - if (!default_bpp) - default_bpp = 8; - - /* Did the user specify a video mode? */ - if (!mode_option) - mode_option = fb_mode_option; - if (mode_option) { - const char *name = mode_option; - 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, margins = 0; - u32 best, diff, tdiff; - - for (i = namelen-1; i >= 0; i--) { - switch (name[i]) { - case '@': - namelen = i; - if (!refresh_specified && !bpp_specified && - !yres_specified) { - refresh = simple_strtol(&name[i+1], NULL, 10); - refresh_specified = 1; - if (cvt || rb) - cvt = 0; - } else - goto done; - break; - case '-': - namelen = i; - if (!bpp_specified && !yres_specified) { - bpp = simple_strtol(&name[i+1], NULL, 10); - bpp_specified = 1; - if (cvt || rb) - cvt = 0; - } else - goto done; - break; - case 'x': - if (!yres_specified) { - yres = simple_strtol(&name[i+1], NULL, 10); - yres_specified = 1; - } else - goto done; - 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; - } - } - if (i < 0 && yres_specified) { - xres = simple_strtol(name, NULL, 10); - 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" : ""); - - memset(&cvt_mode, 0, sizeof(cvt_mode)); - cvt_mode.xres = xres; - cvt_mode.yres = yres; - cvt_mode.refresh = (refresh) ? refresh : 60; + int i; - if (interlace) - cvt_mode.vmode |= FB_VMODE_INTERLACED; - else - cvt_mode.vmode &= ~FB_VMODE_INTERLACED; + /* Set up defaults */ + if (!db) { + db = modedb; + dbsize = ARRAY_SIZE(modedb); + } - ret = fb_find_mode_cvt(&cvt_mode, margins, rb); + if (!default_mode) + default_mode = &db[0]; + + if (!default_bpp) + default_bpp = 8; + + /* Did the user specify a video mode? */ + if (!mode_option) + mode_option = fb_mode_option; + if (mode_option) { + const char *name = mode_option; + 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 margins = 0; + u32 best, diff, tdiff; + + for (i = namelen-1; i >= 0; i--) { + switch (name[i]) { + case '@': + namelen = i; + if (!refresh_specified && !bpp_specified && + !yres_specified) { + refresh = simple_strtol(&name[i+1], NULL, + 10); + refresh_specified = 1; + if (cvt || rb) + cvt = 0; + } else + goto done; + break; + case '-': + namelen = i; + if (!bpp_specified && !yres_specified) { + bpp = simple_strtol(&name[i+1], NULL, + 10); + bpp_specified = 1; + if (cvt || rb) + cvt = 0; + } else + goto done; + break; + case 'x': + if (!yres_specified) { + yres = simple_strtol(&name[i+1], NULL, + 10); + yres_specified = 1; + } else + goto done; + 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; + } + } + if (i < 0 && yres_specified) { + xres = simple_strtol(name, NULL, 10); + 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" : ""); + + memset(&cvt_mode, 0, sizeof(cvt_mode)); + 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; + } - 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("CVT mode invalid, getting mode from database\n"); - } + DPRINTK("Trying specified video mode%s %ix%i\n", + refresh_specified ? "" : " (ignoring refresh rate)", + xres, yres); - DPRINTK("Trying specified video mode%s %ix%i\n", - refresh_specified ? "" : " (ignoring refresh rate)", xres, yres); - - if (!refresh_specified) { - /* - * If the caller has provided a custom mode database and a - * valid monspecs structure, we look for the mode with the - * highest refresh rate. Otherwise we play it safe it and - * try to find a mode with a refresh rate closest to the - * standard 60 Hz. - */ - if (db != modedb && - info->monspecs.vfmin && info->monspecs.vfmax && - info->monspecs.hfmin && info->monspecs.hfmax && - info->monspecs.dclkmax) { - refresh = 1000; - } else { - refresh = 60; + if (!refresh_specified) { + /* + * If the caller has provided a custom mode database and + * a valid monspecs structure, we look for the mode with + * the highest refresh rate. Otherwise we play it safe + * it and try to find a mode with a refresh rate closest + * to the standard 60 Hz. + */ + if (db != modedb && + info->monspecs.vfmin && info->monspecs.vfmax && + info->monspecs.hfmin && info->monspecs.hfmax && + info->monspecs.dclkmax) { + refresh = 1000; + } else { + refresh = 60; + } } - } - diff = -1; - best = -1; - for (i = 0; i < dbsize; i++) { - 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; - } else { + diff = -1; + best = -1; + for (i = 0; i < dbsize; i++) { + 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; + if (abs(db[i].refresh - refresh) < diff) { diff = abs(db[i].refresh - refresh); best = i; } } } - } - if (best != -1) { - fb_try_mode(var, info, &db[best], bpp); - return (refresh_specified) ? 2 : 1; - } - - diff = 2 * (xres + yres); - best = -1; - DPRINTK("Trying best-fit modes\n"); - for (i = 0; i < dbsize; i++) { - DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres); - if (!fb_try_mode(var, info, &db[i], bpp)) { - tdiff = abs(db[i].xres - xres) + - abs(db[i].yres - yres); - - /* - * Penalize modes with resolutions smaller - * than requested. - */ - if (xres > db[i].xres || yres > db[i].yres) - tdiff += xres + yres; + if (best != -1) { + fb_try_mode(var, info, &db[best], bpp); + return (refresh_specified) ? 2 : 1; + } - if (diff > tdiff) { - diff = tdiff; - best = i; + diff = 2 * (xres + yres); + best = -1; + DPRINTK("Trying best-fit modes\n"); + for (i = 0; i < dbsize; i++) { + DPRINTK("Trying %ix%i\n", db[i].xres, db[i].yres); + if (!fb_try_mode(var, info, &db[i], bpp)) { + tdiff = abs(db[i].xres - xres) + + abs(db[i].yres - yres); + + /* + * Penalize modes with resolutions smaller + * than requested. + */ + if (xres > db[i].xres || yres > db[i].yres) + tdiff += xres + yres; + + if (diff > tdiff) { + diff = tdiff; + best = i; + } } } + if (best != -1) { + fb_try_mode(var, info, &db[best], bpp); + return 5; + } } - if (best != -1) { - fb_try_mode(var, info, &db[best], bpp); - return 5; - } - } - DPRINTK("Trying default video mode\n"); - if (!fb_try_mode(var, info, default_mode, default_bpp)) - return 3; + DPRINTK("Trying default video mode\n"); + if (!fb_try_mode(var, info, default_mode, default_bpp)) + return 3; - DPRINTK("Trying all modes\n"); - for (i = 0; i < dbsize; i++) - if (!fb_try_mode(var, info, &db[i], default_bpp)) - return 4; + DPRINTK("Trying all modes\n"); + for (i = 0; i < dbsize; i++) + if (!fb_try_mode(var, info, &db[i], default_bpp)) + return 4; - DPRINTK("No valid mode found\n"); - return 0; + DPRINTK("No valid mode found\n"); + return 0; } /** |