diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/macmodes.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/drivers/video/macmodes.c b/drivers/video/macmodes.c index 083f60321ed8..3e11f7425aef 100644 --- a/drivers/video/macmodes.c +++ b/drivers/video/macmodes.c @@ -134,7 +134,7 @@ static const struct fb_videomode mac_modedb[] = { * * These MUST be ordered in * - increasing resolution - * - decreasing refresh rate + * - decreasing pixel clock period */ static const struct mode_map { @@ -142,20 +142,20 @@ static const struct mode_map { const struct fb_videomode *mode; } mac_modes[] = { /* 640x480 */ - { VMODE_640_480_67, &mac_modedb[1] }, { VMODE_640_480_60, &mac_modedb[0] }, + { VMODE_640_480_67, &mac_modedb[1] }, /* 800x600 */ + { VMODE_800_600_56, &mac_modedb[2] }, + { VMODE_800_600_60, &mac_modedb[3] }, { VMODE_800_600_75, &mac_modedb[5] }, { VMODE_800_600_72, &mac_modedb[4] }, - { VMODE_800_600_60, &mac_modedb[3] }, - { VMODE_800_600_56, &mac_modedb[2] }, /* 832x624 */ { VMODE_832_624_75, &mac_modedb[6] }, /* 1024x768 */ - { VMODE_1024_768_75, &mac_modedb[10] }, - { VMODE_1024_768_75V, &mac_modedb[9] }, - { VMODE_1024_768_70, &mac_modedb[8] }, { VMODE_1024_768_60, &mac_modedb[7] }, + { VMODE_1024_768_70, &mac_modedb[8] }, + { VMODE_1024_768_75V, &mac_modedb[9] }, + { VMODE_1024_768_75, &mac_modedb[10] }, /* 1152x768 */ { VMODE_1152_768_60, &mac_modedb[14] }, /* 1152x870 */ @@ -299,7 +299,6 @@ EXPORT_SYMBOL(mac_vmode_to_var); int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode, int *cmode) { - const struct fb_videomode *mode = NULL; const struct mode_map *map; if (var->bits_per_pixel <= 8) @@ -311,8 +310,13 @@ int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode, else return -EINVAL; + /* + * Find the mac_mode with a matching resolution or failing that, the + * closest larger resolution. Skip modes with a shorter pixel clock period. + */ for (map = mac_modes; map->vmode != -1; map++) { - mode = map->mode; + const struct fb_videomode *mode = map->mode; + if (var->xres > mode->xres || var->yres > mode->yres) continue; if (var->xres_virtual > mode->xres || var->yres_virtual > mode->yres) @@ -322,6 +326,24 @@ int mac_var_to_vmode(const struct fb_var_screeninfo *var, int *vmode, if ((var->vmode & FB_VMODE_MASK) != mode->vmode) continue; *vmode = map->vmode; + + /* + * Having found a good resolution, find the matching pixel clock + * or failing that, the closest longer pixel clock period. + */ + map++; + while (map->vmode != -1) { + const struct fb_videomode *clk_mode = map->mode; + + if (mode->xres != clk_mode->xres || mode->yres != clk_mode->yres) + break; + if (var->pixclock > mode->pixclock) + break; + if (mode->vmode != clk_mode->vmode) + continue; + *vmode = map->vmode; + map++; + } return 0; } return -EINVAL; |