On Sat, Jul 31, 2010 at 05:21:33PM -0400, Jeff Garzik wrote: > On 07/31/2010 04:55 PM, Ondrej Zary wrote: >> I was testing two CyberPro 2000 based PCI cards on x86 and the machine always >> hanged completely when the cyber2000fb module was loaded. It seems that the >> card hangs when some registers are accessed too quickly after writing RAMDAC >> control register. With this patch, both card work. >> >> Add delay after RAMDAC control register write to prevent hangs on module load. >> >> Signed-off-by: Ondrej Zary<linux@xxxxxxxxxxxxxxxxxxxx> >> >> --- linux-2.6.35-rc2-orig/drivers/video/cyber2000fb.c 2010-06-06 05:43:24.000000000 +0200 >> +++ linux-2.6.35-rc3/drivers/video/cyber2000fb.c 2010-07-27 23:12:37.000000000 +0200 >> @@ -436,6 +436,8 @@ static void cyber2000fb_write_ramdac_ctr >> cyber2000fb_writeb(i | 4, 0x3cf, cfb); >> cyber2000fb_writeb(val, 0x3c6, cfb); >> cyber2000fb_writeb(i, 0x3cf, cfb); >> + /* prevent card lock-up observed on x86 with CyberPro 2000 */ >> + cyber2000fb_readb(0x3cf, cfb); >> } > > IIRC, cyber2000 is basically an S3 graphics chip. No such luck. It's a proprietary Integraphics chip, mainly used in ARM Netwinders some 10 years ago. It's completely different from the S3 chips such as Trio64. -- 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
