drm/i915: Disable specific watermark levels when latency is zero

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Return UINT_MAX for the calculated WM level if the latency is zero.
This will lead to marking the WM level as disabled.

I'm not sure if latency==0 should mean that we want to disable the
level. But that's the implication I got from the fact that we don't
even enable the watermark code of the SSKDP register is 0.

v2: Use WARN() to scare people

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ville Syrjälä 2013-08-01 16:18:53 +03:00 • committed by Daniel Vetter

parent 26ec971e30

commit 3312ba65ca

1 changed files with 6 additions and 0 deletions

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drivers/gpu/drm/i915/intel_pm.c

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