ping -- Christian Gmeiner, MSc 2011/11/18 Christian Gmeiner <christian.gmeiner@xxxxxxxxx>: > Hi all, > > I am currently in the process to get some local patches into mainline > and/or fix my > problems the right way. At the moment I am stuck with this problem: > > I am on a device (x86), which is Geode lx800 based and there is a > panel connected to > it. The problem is that two different screen resolutions are used. QVGA and VGA. > Should not sound like a problem, but the lx800 can only do VGA. So get > it working, > I need to pass the correct resolution via kernel cmd to the lxfb > driver and I am using > this patch (based on 2.6.36.4 kernel): > > --- a/drivers/video/fbmem.c > +++ b/drivers/video/fbmem.c > @@ -1050,6 +1050,7 @@ static long do_fb_ioctl(struct fb_info *info, > unsigned int cmd, > ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0; > break; > case FBIOPUT_VSCREENINFO: > +#if 0 > if (copy_from_user(&var, argp, sizeof(var))) > return -EFAULT; > if (!lock_fb_info(info)) > @@ -1062,6 +1063,8 @@ static long do_fb_ioctl(struct fb_info *info, > unsigned int cmd, > unlock_fb_info(info); > if (!ret && copy_to_user(argp, &var, sizeof(var))) > ret = -EFAULT; > +#endif > + ret = 0; > break; > case FBIOGET_FSCREENINFO: > if (!lock_fb_info(info)) > @@ -1086,6 +1089,7 @@ static long do_fb_ioctl(struct fb_info *info, > unsigned int cmd, > ret = fb_cmap_to_user(&cmap_from, &cmap); > break; > case FBIOPAN_DISPLAY: > +#if 0 > if (copy_from_user(&var, argp, sizeof(var))) > return -EFAULT; > if (!lock_fb_info(info)) > @@ -1096,6 +1100,8 @@ static long do_fb_ioctl(struct fb_info *info, > unsigned int cmd, > unlock_fb_info(info); > if (ret == 0 && copy_to_user(argp, &var, sizeof(var))) > return -EFAULT; > +#endif > + ret = 0; > break; > case FBIO_CURSOR: > ret = -EINVAL; > > I need to mention that I am using a custom BIOS and Linux based > bootloader (kexec) in the > boot process. At the moment I am looking into coreboot, but I wanted > to know how to > solve this "problem" the correct way. > > To sum it up: I want to use a QVGA panel with a hardware that only > supports >= VGA. > > Thanks > -- > Christian Gmeiner, MSc > -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
