From dd62608bcc8a629c4c583fb50b90003fd5213516 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Fri, 16 Mar 2012 15:32:16 +1000
Subject: [PATCH] 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>
---
drivers/gpu/drm/nouveau/nvd0_display.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nvd0_display.c b/drivers/gpu/drm/nouveau/nvd0_display.c
index 5e2b79bdcae0d..421d301b3797a 100644
--- a/drivers/gpu/drm/nouveau/nvd0_display.c
+++ b/drivers/gpu/drm/nouveau/nvd0_display.c
@@ -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);
}
--
2.30.2