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fedora core 6 1.2949 + vserver 2.2.0
[linux-2.6.git]
/
drivers
/
video
/
matrox
/
g450_pll.c
diff --git
a/drivers/video/matrox/g450_pll.c
b/drivers/video/matrox/g450_pll.c
index
440272a
..
7c76e07
100644
(file)
--- a/
drivers/video/matrox/g450_pll.c
+++ b/
drivers/video/matrox/g450_pll.c
@@
-331,7
+331,15
@@
static int __g450_setclk(WPMINFO unsigned int fout, unsigned int pll,
tmp |= M1064_XPIXCLKCTRL_PLL_UP;
}
matroxfb_DAC_out(PMINFO M1064_XPIXCLKCTRL, tmp);
tmp |= M1064_XPIXCLKCTRL_PLL_UP;
}
matroxfb_DAC_out(PMINFO M1064_XPIXCLKCTRL, tmp);
+#ifdef __powerpc__
+ /* This is necessary to avoid jitter on PowerPC
+ * (OpenFirmware) systems, but apparently
+ * introduces jitter, at least on a x86-64
+ * using DVI.
+ * A simple workaround is disable for non-PPC.
+ */
matroxfb_DAC_out(PMINFO M1064_XDVICLKCTRL, 0);
matroxfb_DAC_out(PMINFO M1064_XDVICLKCTRL, 0);
+#endif /* __powerpc__ */
matroxfb_DAC_out(PMINFO M1064_XPWRCTRL, xpwrctrl);
matroxfb_DAC_unlock_irqrestore(flags);
matroxfb_DAC_out(PMINFO M1064_XPWRCTRL, xpwrctrl);
matroxfb_DAC_unlock_irqrestore(flags);