Fix divide by zero if we end up updating the watermarks
with zero dotclock.
This is a stop gap measure to allow module load in cases
where our state keeping fails.
Cc: Damien Lespiau <damien.lesp...@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuopp...@intel.com>
---
drivers/gpu/drm/i915/intel_pm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 5eeddc9..755f0e8 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3316,8 +3316,10 @@ skl_compute_linetime_wm(struct drm_crtc *crtc, struct
skl_pipe_wm_parameters *p)
if (!to_intel_crtc(crtc)->active)
return 0;
- return DIV_ROUND_UP(8 * p->pipe_htotal * 1000, p->pixel_rate);
+ if (p->pixel_rate == 0)
+ return 0;
+ return DIV_ROUND_UP(8 * p->pipe_htotal * 1000, p->pixel_rate);
}
static void skl_compute_transition_wm(struct drm_crtc *crtc,
--
2.1.4
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