[Intel-gfx] [PATCH 1/6] drm/i915: Remove stallcheck special handling.

[Maarten Lankhorst]

Re-use unpin_work->pending, but also set vblank count before
intel_mark_page_flip_active to be sure.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c  | 11 ++++++-----
 drivers/gpu/drm/i915/intel_display.c | 31 ++++++++++++-------------------
 drivers/gpu/drm/i915/intel_drv.h     |  1 -
 3 files changed, 18 insertions(+), 25 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index e0ba3e38000f..310043d73bf7 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -581,9 +581,14 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data)
 			seq_printf(m, "No flip due on pipe %c (plane %c)\n",
 				   pipe, plane);
 		} else {
+			u32 pending;
 			u32 addr;
 
-			if (atomic_read(&work->pending) < INTEL_FLIP_COMPLETE) {
+			pending = atomic_read(&work->pending);
+			if (pending == INTEL_FLIP_INACTIVE) {
+				seq_printf(m, "Flip ioctl preparing on pipe %c (plane %c)\n",
+					   pipe, plane);
+			} else if (pending >= INTEL_FLIP_COMPLETE) {
 				seq_printf(m, "Flip queued on pipe %c (plane %c)\n",
 					   pipe, plane);
 			} else {
@@ -605,10 +610,6 @@ static int i915_gem_pageflip_info(struct seq_file *m, void *data)
 				   work->flip_queued_vblank,
 				   work->flip_ready_vblank,
 				   drm_crtc_vblank_count(&crtc->base));
-			if (work->enable_stall_check)
-				seq_puts(m, "Stall check enabled, ");
-			else
-				seq_puts(m, "Stall check waiting for page flip ioctl, ");
 			seq_printf(m, "%d prepares\n", atomic_read(&work->pending));
 
 			if (INTEL_INFO(dev)->gen >= 4)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 51f913fb199d..6303438df9f2 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11315,8 +11315,6 @@ static void intel_do_mmio_flip(struct intel_mmio_flip *mmio_flip)
 	if (work == NULL)
 		return;
 
-	intel_mark_page_flip_active(work);
-
 	intel_pipe_update_start(crtc);
 
 	if (INTEL_INFO(mmio_flip->i915)->gen >= 9)
@@ -11326,6 +11324,8 @@ static void intel_do_mmio_flip(struct intel_mmio_flip *mmio_flip)
 		ilk_do_mmio_flip(crtc, work);
 
 	intel_pipe_update_end(crtc);
+
+	intel_mark_page_flip_active(work);
 }
 
 static void intel_mmio_flip_work_func(struct work_struct *work)
@@ -11392,15 +11392,11 @@ static bool __intel_pageflip_stall_check(struct drm_device *dev,
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_unpin_work *work = intel_crtc->unpin_work;
 	u32 addr;
+	u32 pending;
 
-	if (atomic_read(&work->pending) >= INTEL_FLIP_COMPLETE)
-		return true;
-
-	if (atomic_read(&work->pending) < INTEL_FLIP_PENDING)
-		return false;
-
-	if (!work->enable_stall_check)
-		return false;
+	pending = atomic_read(&work->pending);
+	if (pending != INTEL_FLIP_PENDING)
+		return pending == INTEL_FLIP_COMPLETE;
 
 	if (work->flip_ready_vblank == 0) {
 		if (work->flip_queued_req &&
@@ -11576,6 +11572,11 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	 */
 	if (!mmio_flip) {
 		ret = i915_gem_object_sync(obj, engine, &request);
+		if (!ret && !request) {
+			request = i915_gem_request_alloc(engine, NULL);
+			ret = PTR_ERR_OR_ZERO(request);
+		}
+
 		if (ret)
 			goto cleanup_pending;
 	}
@@ -11587,6 +11588,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 	work->gtt_offset = intel_plane_obj_offset(to_intel_plane(primary),
 						  obj, 0);
 	work->gtt_offset += intel_crtc->dspaddr_offset;
+	work->flip_queued_vblank = drm_crtc_vblank_count(crtc);
 
 	if (mmio_flip) {
 		ret = intel_queue_mmio_flip(dev, crtc, obj);
@@ -11596,14 +11598,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 		i915_gem_request_assign(&work->flip_queued_req,
 					obj->last_write_req);
 	} else {
-		if (!request) {
-			request = i915_gem_request_alloc(engine, NULL);
-			if (IS_ERR(request)) {
-				ret = PTR_ERR(request);
-				goto cleanup_unpin;
-			}
-		}
-
 		ret = dev_priv->display.queue_flip(dev, crtc, fb, obj, request,
 						   page_flip_flags);
 		if (ret)
@@ -11616,7 +11610,6 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc,
 		i915_add_request_no_flush(request);
 
 	work->flip_queued_vblank = drm_crtc_vblank_count(crtc);
-	work->enable_stall_check = true;
 
 	i915_gem_track_fb(intel_fb_obj(work->old_fb), obj,
 			  to_intel_plane(primary)->frontbuffer_bit);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index c87b4503435d..7f0779783851 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -950,7 +950,6 @@ struct intel_unpin_work {
 	struct drm_i915_gem_request *flip_queued_req;
 	u32 flip_queued_vblank;
 	u32 flip_ready_vblank;
-	bool enable_stall_check;
 };
 
 struct intel_load_detect_pipe {
-- 
2.1.0