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| author | Steven Whitehouse <swhiteho@redhat.com> | 2006-08-29 11:39:34 -0400 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-08-29 11:39:34 -0400 |
| commit | 83b7a664a0c7c39ccfa4c72535dc1c001d4e7a18 (patch) | |
| tree | 5ba3bbbe977c2047658b41e22d6b2abd5686bf15 /drivers/video/matrox/g450_pll.c | |
| parent | 8638460540749ddb1beca9e9a68d655a6fe6df65 (diff) | |
| parent | d96299537e43681942ea272e00b0e529aa5b5fa4 (diff) | |
Merge branch 'master' into gfs2
Diffstat (limited to 'drivers/video/matrox/g450_pll.c')
| -rw-r--r-- | drivers/video/matrox/g450_pll.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/video/matrox/g450_pll.c b/drivers/video/matrox/g450_pll.c index 440272ad10e..7c76e079ca7 100644 --- 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); +#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); +#endif /* __powerpc__ */ matroxfb_DAC_out(PMINFO M1064_XPWRCTRL, xpwrctrl); matroxfb_DAC_unlock_irqrestore(flags); |