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drm/i915/overlay: Combine SWITCH_OFF into a single step

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We can program the h/w to first wait on the flip and then switch off
without relying on s/w intervention. This removes the need for a double
step switch off, bringing much rejoicing.

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 12:07:32 +01:00
parent 9bb2ff731b
commit 8dfbc34031
2 changed files with 6 additions and 35 deletions
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3
drivers/gpu/drm/i915/intel_drv.h
View file

@ -167,8 +167,7 @@ struct intel_overlay {
#define HW_WEDGED 1
#define NEEDS_WAIT_FOR_FLIP 2
#define RELEASE_OLD_VID 3
#define SWITCH_OFF_STAGE_1 4
#define SWITCH_OFF_STAGE_2 5
#define SWITCH_OFF 4
};
struct intel_crtc {

38
drivers/gpu/drm/i915/intel_overlay.c
View file

@ -325,7 +325,6 @@ static int intel_overlay_off(struct intel_overlay *overlay)
{
u32 flip_addr = overlay->flip_addr;
struct drm_device *dev = overlay->dev;
int ret;
BUG_ON(!overlay->active);
@ -335,29 +334,18 @@ static int intel_overlay_off(struct intel_overlay *overlay)
* of the hw. Do it in both cases */
flip_addr |= OFC_UPDATE;
BEGIN_LP_RING(6);
/* wait for overlay to go idle */
BEGIN_LP_RING(4);
OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_CONTINUE);
OUT_RING(flip_addr);
OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
OUT_RING(MI_NOOP);
ADVANCE_LP_RING();
ret = intel_overlay_do_wait_request(overlay, true,
SWITCH_OFF_STAGE_1);
if (ret)
return ret;
/* turn overlay off */
BEGIN_LP_RING(4);
OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
OUT_RING(flip_addr);
OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
OUT_RING(MI_NOOP);
ADVANCE_LP_RING();
return intel_overlay_do_wait_request(overlay, true,
SWITCH_OFF_STAGE_2);
return intel_overlay_do_wait_request(overlay, true, SWITCH_OFF);
}
static void intel_overlay_off_tail(struct intel_overlay *overlay)
@ -383,9 +371,8 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
bool interruptible)
{
struct drm_device *dev = overlay->dev;
struct drm_gem_object *obj;
drm_i915_private_t *dev_priv = dev->dev_private;
u32 flip_addr;
struct drm_gem_object *obj;
int ret;
if (overlay->hw_wedged == HW_WEDGED)
@ -404,25 +391,10 @@ int intel_overlay_recover_from_interrupt(struct intel_overlay *overlay,
overlay->old_vid_bo = NULL;
break;
case SWITCH_OFF_STAGE_1:
flip_addr = overlay->flip_addr;
flip_addr |= OFC_UPDATE;
BEGIN_LP_RING(4);
OUT_RING(MI_OVERLAY_FLIP | MI_OVERLAY_OFF);
OUT_RING(flip_addr);
OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_OVERLAY_FLIP);
OUT_RING(MI_NOOP);
ADVANCE_LP_RING();
ret = intel_overlay_do_wait_request(overlay, interruptible,
SWITCH_OFF_STAGE_2);
if (ret)
return ret;
case SWITCH_OFF_STAGE_2:
case SWITCH_OFF:
intel_overlay_off_tail(overlay);
break;
default:
BUG_ON(overlay->hw_wedged != NEEDS_WAIT_FOR_FLIP);
}