[PATCH] sstfb: fix pixclock setting on Voodoo 1/2 cards

Pixclock setting in sstfb didn't work with my Voodoo 2 card with ICS 5342 DAC
(this DAC requires two consecutive writes to one of its registers to program
pixclock - maybe first write merged with second).
Signed-off-by: NOndrej Zajicek <santiago@crfreenet.org>
Signed-off-by: NAntonino Daplas <adaplas@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/sstfb.c

@@ -257,6 +257,7 @@ static void __sst_dac_write(u8 __iomem *vbase, u8 reg, u8 val)
 	r_dprintk("sst_dac_write(%#x, %#x)\n", reg, val);
 	reg &= 0x07;
 	__sst_write(vbase, DAC_DATA,(((u32)reg << 8)) | (u32)val);
+	__sst_wait_idle(vbase);
 }
 
 /* indexed access to ti/att dacs */