drm/i915: don't read LVDS regs at compute_config time

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We may reach this point while the machine is still runtime suspended,
so we'll hit a WARN. The other encoders also don't touch registers at
this point, so instead of waking the machine up, write some code to
keep the register always at the same state, including after we runtime
suspend/resume.

Testcase: igt/pm_rpm
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80463
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Paulo Zanoni 2014-07-04 13:38:36 -03:00 • committed by Daniel Vetter

parent 34a6c70f09

commit 1f835a77ac

1 changed files with 9 additions and 4 deletions

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drivers/gpu/drm/i915/intel_lvds.c

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