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Commit b303cf95 authored by Chris Wilson's avatar Chris Wilson
Browse files

drm/i915/overlay: Use a continuation hook to finish work after a flip. 



Slightly easier to follow than the state machine and now possible as the
control structure is opaque and hw_wedged is no longer interferred with.

Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 23f09ce3

drivers/gpu/drm/i915/intel_overlay.c

+44 −66
Original line number Diff line number Diff line
@@ -186,11 +186,7 @@ struct intel_overlay { 
	struct drm_i915_gem_object *reg_bo;

	/* flip handling */

	uint32_t last_flip_req;

	int hw_wedged;

#define HW_WEDGED		1

#define NEEDS_WAIT_FOR_FLIP	2

#define RELEASE_OLD_VID		3

#define SWITCH_OFF		4

	void (*flip_tail)(struct intel_overlay *);

};



static struct overlay_registers *
@@ -243,25 +239,25 @@ static void intel_overlay_unmap_regs(struct intel_overlay *overlay, 
static int intel_overlay_do_wait_request(struct intel_overlay *overlay,

					 struct drm_i915_gem_request *request,

					 bool interruptible,

					 int stage)

					 void (*tail)(struct intel_overlay *))

{

	struct drm_device *dev = overlay->dev;

	drm_i915_private_t *dev_priv = dev->dev_private;

	int ret;



	BUG_ON(overlay->last_flip_req);

	overlay->last_flip_req =

		i915_add_request(dev, NULL, request, &dev_priv->render_ring);

	if (overlay->last_flip_req == 0)

		return -ENOMEM;



	overlay->hw_wedged = stage;

	overlay->flip_tail = tail;

	ret = i915_do_wait_request(dev,

				   overlay->last_flip_req, true,

				   &dev_priv->render_ring);

	if (ret)

		return ret;



	overlay->hw_wedged = 0;

	overlay->last_flip_req = 0;

	return 0;

}
@@ -344,8 +340,7 @@ static int intel_overlay_on(struct intel_overlay *overlay) 
	OUT_RING(MI_NOOP);

	ADVANCE_LP_RING();



	ret = intel_overlay_do_wait_request(overlay, request, true,

					    NEEDS_WAIT_FOR_FLIP);

	ret = intel_overlay_do_wait_request(overlay, request, true, NULL);

out:

	if (pipe_a_quirk)

		i830_deactivate_pipe_a(dev);
@@ -387,6 +382,33 @@ static int intel_overlay_continue(struct intel_overlay *overlay, 
	return 0;

}



static void intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)

{

	struct drm_gem_object *obj = &overlay->old_vid_bo->base;



	i915_gem_object_unpin(obj);

	drm_gem_object_unreference(obj);



	overlay->old_vid_bo = NULL;

}



static void intel_overlay_off_tail(struct intel_overlay *overlay)

{

	struct drm_gem_object *obj;



	/* never have the overlay hw on without showing a frame */

	BUG_ON(!overlay->vid_bo);

	obj = &overlay->vid_bo->base;



	i915_gem_object_unpin(obj);

	drm_gem_object_unreference(obj);

	overlay->vid_bo = NULL;



	overlay->crtc->overlay = NULL;

	overlay->crtc = NULL;

	overlay->active = 0;

}



/* overlay needs to be disabled in OCMD reg */

static int intel_overlay_off(struct intel_overlay *overlay,

			     bool interruptible)
@@ -419,34 +441,7 @@ static int intel_overlay_off(struct intel_overlay *overlay, 
	ADVANCE_LP_RING();



	return intel_overlay_do_wait_request(overlay, request, interruptible,

					     SWITCH_OFF);

}



static void intel_overlay_release_old_vid_tail(struct intel_overlay *overlay)

{

	struct drm_gem_object *obj = &overlay->old_vid_bo->base;



	i915_gem_object_unpin(obj);

	drm_gem_object_unreference(obj);



	overlay->old_vid_bo = NULL;

}



static void intel_overlay_off_tail(struct intel_overlay *overlay)

{

	struct drm_gem_object *obj;



	/* never have the overlay hw on without showing a frame */

	BUG_ON(!overlay->vid_bo);

	obj = &overlay->vid_bo->base;



	i915_gem_object_unpin(obj);

	drm_gem_object_unreference(obj);

	overlay->vid_bo = NULL;



	overlay->crtc->overlay = NULL;

	overlay->crtc = NULL;

	overlay->active = 0;

					     intel_overlay_off_tail);

}



/* recover from an interruption due to a signal
@@ -458,28 +453,17 @@ static int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay, 
	drm_i915_private_t *dev_priv = dev->dev_private;

	int ret;



	if (overlay->hw_wedged == HW_WEDGED)

		return -EIO;

	if (overlay->last_flip_req == 0)

		return 0;



	ret = i915_do_wait_request(dev, overlay->last_flip_req,

				   interruptible, &dev_priv->render_ring);

	if (ret)

		return ret;



	switch (overlay->hw_wedged) {

	case RELEASE_OLD_VID:

		intel_overlay_release_old_vid_tail(overlay);

		break;

	if (overlay->flip_tail)

		overlay->flip_tail(overlay);



	case SWITCH_OFF:

		intel_overlay_off_tail(overlay);

		break;



	default:

		BUG_ON(overlay->hw_wedged != NEEDS_WAIT_FOR_FLIP);

	}



	overlay->hw_wedged = 0;

	overlay->last_flip_req = 0;

	return 0;

}
@@ -514,7 +498,7 @@ static int intel_overlay_release_old_vid(struct intel_overlay *overlay) 
		ADVANCE_LP_RING();



		ret = intel_overlay_do_wait_request(overlay, request, true,

						    RELEASE_OLD_VID);

						    intel_overlay_release_old_vid_tail);

		if (ret)

			return ret;

	}
@@ -889,12 +873,9 @@ int intel_overlay_switch_off(struct intel_overlay *overlay, 
	BUG_ON(!mutex_is_locked(&dev->struct_mutex));

	BUG_ON(!mutex_is_locked(&dev->mode_config.mutex));



	if (overlay->hw_wedged) {

		ret = intel_overlay_recover_from_interrupt(overlay,

							   interruptible);

	ret = intel_overlay_recover_from_interrupt(overlay, interruptible);

	if (ret != 0)

		return ret;

	}



	if (!overlay->active)

		return 0;
@@ -912,7 +893,6 @@ int intel_overlay_switch_off(struct intel_overlay *overlay, 
		return ret;



	intel_overlay_off_tail(overlay);



	return 0;

}
@@ -1153,11 +1133,9 @@ int intel_overlay_put_image(struct drm_device *dev, void *data, 
	mutex_lock(&dev->mode_config.mutex);

	mutex_lock(&dev->struct_mutex);



	if (overlay->hw_wedged) {

		ret = intel_overlay_recover_from_interrupt(overlay, 1);

	ret = intel_overlay_recover_from_interrupt(overlay, true);

	if (ret != 0)

		goto out_unlock;

	}



	if (overlay->crtc != crtc) {

		struct drm_display_mode *mode = &crtc->base.mode;