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

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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: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2010-08-12 14:03:48 +01:00
parent 23f09ce31c
commit b303cf9542
1 changed files with 44 additions and 66 deletions
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110
drivers/gpu/drm/i915/intel_overlay.c
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@ -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);
if (ret != 0)
return ret;
}
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);
if (ret != 0)
goto out_unlock;
}
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;