drm/i915: do display power state notification on crtc enable/disable (8807e55b) · Commits · 戴 / test

The spec says to notify prior to power down and after power up. It is unclear whether it makes a difference. Signed-off-by:

drivers/gpu/drm/i915/intel_display.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -3427,8 +3427,10 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
		intel_update_fbc(dev);
		mutex_unlock(&dev->struct_mutex);

		for_each_encoder_on_crtc(dev, crtc, encoder)
		for_each_encoder_on_crtc(dev, crtc, encoder) {
		encoder->enable(encoder);
		intel_opregion_notify_encoder(encoder, true);
		}

		/*
		* There seems to be a race in PCH platform hw (at least on some
		@@ -3542,8 +3544,10 @@ static void haswell_crtc_disable(struct drm_crtc *crtc)
		if (!intel_crtc->active)
		return;

		for_each_encoder_on_crtc(dev, crtc, encoder)
		for_each_encoder_on_crtc(dev, crtc, encoder) {
		intel_opregion_notify_encoder(encoder, false);
		encoder->disable(encoder);
		}

		intel_crtc_wait_for_pending_flips(crtc);
		drm_vblank_off(dev, pipe);