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savagefb: Use panel CVT mode as default 

If there is no EDID but an LCD panel is detected, generate a CVT
mode from the panel resolution (at 60 Hz), and use this as a
default mode instead of the hardcoded 800x600x8 mode.

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Tormod Volden 2011-05-28 15:06:11 +00:00 committed by Paul Mundt
parent 554cc10286
commit 1bae852fb0
2 changed files with 17 additions and 0 deletions
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1
drivers/video/modedb.c
View File

@ -1128,3 +1128,4 @@ EXPORT_SYMBOL(fb_find_best_mode);
EXPORT_SYMBOL(fb_find_nearest_mode);
EXPORT_SYMBOL(fb_videomode_to_modelist);
EXPORT_SYMBOL(fb_find_mode);
EXPORT_SYMBOL(fb_find_mode_cvt);

16
drivers/video/savage/savagefb_driver.c
View File

@ -2237,6 +2237,22 @@ static int __devinit savagefb_probe(struct pci_dev* dev,
&info->modelist);
#endif
info->var = savagefb_var800x600x8;
/* if a panel was detected, default to a CVT mode instead */
if (par->SavagePanelWidth) {
struct fb_videomode cvt_mode;
memset(&cvt_mode, 0, sizeof(cvt_mode));
cvt_mode.xres = par->SavagePanelWidth;
cvt_mode.yres = par->SavagePanelHeight;
cvt_mode.refresh = 60;
/* FIXME: if we know there is only the panel
* we can enable reduced blanking as well */
if (fb_find_mode_cvt(&cvt_mode, 0, 0))
printk(KERN_WARNING "No CVT mode found for panel\n");
else if (fb_find_mode(&info->var, info, NULL, NULL, 0,
&cvt_mode, 0) != 3)
info->var = savagefb_var800x600x8;
}
if (mode_option) {
fb_find_mode(&info->var, info, mode_option,