[Intel-gfx] [PATCH 02/10] drm/i915: Split atomic wm update to pre and post variants

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Try to update the watermarks on the right side of the plane update. This
is just a temporary hack until we get the proper two part update into
place. However in the meantime this might have some chance of at least
working.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 15 +++++++++++----
 drivers/gpu/drm/i915/intel_drv.h     |  2 +-
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 29c584c..1a1c686 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -4713,6 +4713,9 @@ static void intel_post_plane_update(struct intel_crtc *crtc)
 
 	intel_frontbuffer_flip(dev, atomic->fb_bits);
 
+	if (crtc->atomic.update_wm_post)
+		intel_update_watermarks(&crtc->base);
+
 	if (atomic->update_fbc) {
 		mutex_lock(&dev->struct_mutex);
 		intel_fbc_update(dev);
@@ -11641,8 +11644,12 @@ int intel_plane_atomic_calc_changes(struct drm_crtc_state *crtc_state,
 			 plane->base.id, was_visible, visible,
 			 turn_off, turn_on, mode_changed);
 
-	if (intel_wm_need_update(plane, plane_state))
-		intel_crtc->atomic.update_wm = true;
+	if (turn_on)
+		intel_crtc->atomic.update_wm_pre = true;
+	else if (turn_off)
+		intel_crtc->atomic.update_wm_post = true;
+	else if (intel_wm_need_update(plane, plane_state))
+		intel_crtc->atomic.update_wm_pre = true;
 
 	if (visible)
 		intel_crtc->atomic.fb_bits |=
@@ -11800,7 +11807,7 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc,
 		intel_crtc_check_initial_planes(crtc, crtc_state);
 
 	if (mode_changed)
-		intel_crtc->atomic.update_wm = !crtc_state->active;
+		intel_crtc->atomic.update_wm_post = !crtc_state->active;
 
 	if (mode_changed && crtc_state->enable &&
 	    dev_priv->display.crtc_compute_clock &&
@@ -13729,7 +13736,7 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc)
 	if (!needs_modeset(crtc->state))
 		intel_pre_plane_update(intel_crtc);
 
-	if (intel_crtc->atomic.update_wm)
+	if (intel_crtc->atomic.update_wm_pre)
 		intel_update_watermarks(crtc);
 
 	intel_runtime_pm_get(dev_priv);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index de2cc26..fefaf01 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -499,7 +499,7 @@ struct intel_crtc_atomic_commit {
 	bool wait_for_flips;
 	bool disable_fbc;
 	bool pre_disable_primary;
-	bool update_wm;
+	bool update_wm_pre, update_wm_post;
 	unsigned disabled_planes;
 
 	/* Sleepable operations to perform after commit */
-- 
2.3.6