drm/nvd0/disp: ignore clock set if no pclk
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>
diff --git a/drivers/gpu/drm/nouveau/nvd0_display.c b/drivers/gpu/drm/nouveau/nvd0_display.c
index 5e2b79b..421d301 100644
--- a/drivers/gpu/drm/nouveau/nvd0_display.c
+++ b/drivers/gpu/drm/nouveau/nvd0_display.c
@@ -1661,7 +1661,9 @@
}
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);
}