savagefb: Use panel CVT mode as default
Tormod Volden [Sat, 28 May 2011 15:06:11 +0000 (15:06 +0000)]
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>

drivers/video/modedb.c
drivers/video/savage/savagefb_driver.c

index 48c3ea8..cb175fe 100644 (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);
index 3b7f2f5..4de541c 100644 (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,