drm/i915: WARN when trying to enabled an unused crtc

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This is the first tiny step towards cross-checking the entire modeset
state machine with WARNs. A crtc can only be enabled when it's
actually in use, i.e. crtc->active imlies crtc->enabled.

Unfortunately we can't (yet) check this when disabling the crtc,
because the crtc helpers are a bit slopy with updating state and
unconditionally update crtc->enabled before changing the hw state.

Fixing that requires quite some more work.

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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This commit is contained in:

Daniel Vetter 2012-07-02 11:43:47 +02:00

parent dbf2b54e78

commit 08a4846969

2 changed files with 13 additions and 1 deletions

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4

drivers/gpu/drm/i915/intel_display.c

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10

drivers/gpu/drm/i915/intel_drv.h

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