drm/i915: IBX+ doesn't have separate vsync/hsync controls on the VGA DAC

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When the PCH split occurred, hw dropped support for separate hsync and
vsync disable in the VGA DAC.  So add a PCH specific DPMS function that
just uses the port enable bit for controlling DPMS states.

Before this fix, when anything other than a full DPMS off occurred,
the VGA port would be left enabled and scanning out while all the other
heads would turn off as expected.

v2: duplicate encoder helper vtable into pch and gmch versions (Daniel)

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=48491
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
[danvet: s/intel_crt_dpms/gmch_crt_dpms as suggested by Chris.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

...

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Jesse Barnes 2012-04-17 15:06:33 -07:00 • committed by Daniel Vetter

parent 446f254566

commit df0323c42a

1 changed files with 43 additions and 11 deletions

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drivers/gpu/drm/i915/intel_crt.c

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