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drm/i915: Use pipe state to tell when pipe is off

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Instead of waiting for the display line value to settle, we can simply
wait for the pipe configuration register 'state' bit to turn off.

Contrarywise, disabling the plane will not cause the display line
value to stop changing, so instead we wait for the vblank interrupt
bit to get set. And, we only do this when we're not about to wait for
the pipe to turn off.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Keith Packard
2010-10-03 00:33:06 -07:00
committed by Chris Wilson
parent b99a9d9bb6
commit ab7ad7f645
2 changed files with 36 additions and 23 deletions
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1
drivers/gpu/drm/i915/intel_drv.h
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@@ -229,7 +229,6 @@ extern struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
struct drm_crtc *crtc);
int intel_get_pipe_from_crtc_id(struct drm_device *dev, void *data,
struct drm_file *file_priv);
extern void intel_wait_for_vblank_off(struct drm_device *dev, int pipe);
extern void intel_wait_for_vblank(struct drm_device *dev, int pipe);
extern struct drm_crtc *intel_get_crtc_from_pipe(struct drm_device *dev, int pipe);
extern struct drm_crtc *intel_get_load_detect_pipe(struct intel_encoder *intel_encoder,