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drm/nvd0/disp: ignore clock set if no pclk

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This happens somehow during init on a machine I have, and leads to a
divide-by-zero.

Lets avoid that...

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-03-16 15:32:16 +10:00
parent 27100ac95a
commit dd62608bcc
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/nouveau/nvd0_display.c
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@ -1661,7 +1661,9 @@ nvd0_display_unk2_handler(struct drm_device *dev, u32 crtc, u32 mask)
}
pclk = nv_rd32(dev, 0x660450 + (crtc * 0x300)) / 1000;
if (mask & 0x00010000) {
NV_DEBUG_KMS(dev, "PDISP: crtc %d pclk %d mask 0x%08x\n",
crtc, pclk, mask);
if (pclk && (mask & 0x00010000)) {
nv50_crtc_set_clock(dev, crtc, pclk);
}