[DPU PATCH 01/11] drm/msm: Skip seamless disables in crtc/encoder

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Instead of duplicating whole swaths of atomic helper functions (which
are already out-of-date), just skip the encoder/crtc disables in the
.disable hooks.

Change-Id: I7bd9183ae60624204fb1de9550656b776efc7202
Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c    |   8 +
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c |   8 +
 drivers/gpu/drm/msm/msm_atomic.c            | 185 +-------------------
 3 files changed, 17 insertions(+), 184 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index 3cdf1e3d9d96..a3ab6ed2bf1d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -3393,6 +3393,7 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
 {
 	struct dpu_crtc *dpu_crtc;
 	struct dpu_crtc_state *cstate;
+	struct drm_display_mode *mode;
 	struct drm_encoder *encoder;
 	struct msm_drm_private *priv;
 	unsigned long flags;
@@ -3407,8 +3408,15 @@ static void dpu_crtc_disable(struct drm_crtc *crtc)
 	}
 	dpu_crtc = to_dpu_crtc(crtc);
 	cstate = to_dpu_crtc_state(crtc->state);
+	mode = &cstate->base.adjusted_mode;
 	priv = crtc->dev->dev_private;
 
+	if (msm_is_mode_seamless(mode) || msm_is_mode_seamless_vrr(mode) ||
+	    msm_is_mode_seamless_dms(mode)) {
+		DPU_DEBUG("Seamless mode is being applied, skip disable\n");
+		return;
+	}
+
 	DPU_DEBUG("crtc%d\n", crtc->base.id);
 
 	if (dpu_kms_is_suspend_state(crtc->dev))
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 3d168fa09f3f..28ceb589ee40 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -2183,6 +2183,7 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 	struct dpu_encoder_virt *dpu_enc = NULL;
 	struct msm_drm_private *priv;
 	struct dpu_kms *dpu_kms;
+	struct drm_display_mode *mode;
 	int i = 0;
 
 	if (!drm_enc) {
@@ -2196,6 +2197,13 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 		return;
 	}
 
+	mode = &drm_enc->crtc->state->adjusted_mode;
+	if (msm_is_mode_seamless(mode) || msm_is_mode_seamless_vrr(mode) ||
+	    msm_is_mode_seamless_dms(mode)) {
+		DPU_DEBUG("Seamless mode is being applied, skip disable\n");
+		return;
+	}
+
 	dpu_enc = to_dpu_encoder_virt(drm_enc);
 	DPU_DEBUG_ENC(dpu_enc, "\n");
 
diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 46536edb72ee..5cfb80345052 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -84,189 +84,6 @@ static void msm_atomic_wait_for_commit_done(
 	}
 }
 
-static void
-msm_disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
-{
-	struct drm_connector *connector;
-	struct drm_connector_state *old_conn_state, *new_conn_state;
-	struct drm_crtc *crtc;
-	struct drm_crtc_state *old_crtc_state, *new_crtc_state;
-	int i;
-
-	for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) {
-		const struct drm_encoder_helper_funcs *funcs;
-		struct drm_encoder *encoder;
-		struct drm_crtc_state *old_crtc_state;
-		unsigned int crtc_idx;
-
-		/*
-		 * Shut down everything that's in the changeset and currently
-		 * still on. So need to check the old, saved state.
-		 */
-		if (!old_conn_state->crtc)
-			continue;
-
-		crtc_idx = drm_crtc_index(old_conn_state->crtc);
-		old_crtc_state = drm_atomic_get_old_crtc_state(old_state,
-							old_conn_state->crtc);
-
-		if (!old_crtc_state->active ||
-		    !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))
-			continue;
-
-		encoder = old_conn_state->best_encoder;
-
-		/* We shouldn't get this far if we didn't previously have
-		 * an encoder.. but WARN_ON() rather than explode.
-		 */
-		if (WARN_ON(!encoder))
-			continue;
-
-		if (msm_is_mode_seamless(
-			&connector->encoder->crtc->state->mode) ||
-			msm_is_mode_seamless_vrr(
-			&connector->encoder->crtc->state->adjusted_mode))
-			continue;
-
-		if (msm_is_mode_seamless_dms(
-			&connector->encoder->crtc->state->adjusted_mode))
-			continue;
-
-		funcs = encoder->helper_private;
-
-		DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n",
-				 encoder->base.id, encoder->name);
-
-		/*
-		 * Each encoder has at most one connector (since we always steal
-		 * it away), so we won't call disable hooks twice.
-		 */
-		drm_bridge_disable(encoder->bridge);
-
-		/* Right function depends upon target state. */
-		if (new_conn_state->crtc && funcs->prepare)
-			funcs->prepare(encoder);
-		else if (funcs->disable)
-			funcs->disable(encoder);
-		else
-			funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
-
-		drm_bridge_post_disable(encoder->bridge);
-	}
-
-	for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
-		const struct drm_crtc_helper_funcs *funcs;
-
-		/* Shut down everything that needs a full modeset. */
-		if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
-			continue;
-
-		if (!old_crtc_state->active)
-			continue;
-
-		if (msm_is_mode_seamless(&crtc->state->mode) ||
-			msm_is_mode_seamless_vrr(&crtc->state->adjusted_mode))
-			continue;
-
-		if (msm_is_mode_seamless_dms(&crtc->state->adjusted_mode))
-			continue;
-
-		funcs = crtc->helper_private;
-
-		DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n",
-				 crtc->base.id);
-
-		/* Right function depends upon target state. */
-		if (new_crtc_state->enable && funcs->prepare)
-			funcs->prepare(crtc);
-		else if (funcs->disable)
-			funcs->disable(crtc);
-		else
-			funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
-	}
-}
-
-static void
-msm_crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
-{
-	struct drm_crtc *crtc;
-	struct drm_crtc_state *new_crtc_state;
-	struct drm_connector *connector;
-	struct drm_connector_state *new_conn_state;
-	int i;
-
-	for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
-		const struct drm_crtc_helper_funcs *funcs;
-
-		if (!new_crtc_state->mode_changed)
-			continue;
-
-		funcs = crtc->helper_private;
-
-		if (new_crtc_state->enable && funcs->mode_set_nofb) {
-			DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n",
-					 crtc->base.id);
-
-			funcs->mode_set_nofb(crtc);
-		}
-	}
-
-	for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
-		const struct drm_encoder_helper_funcs *funcs;
-		struct drm_crtc_state *new_crtc_state;
-		struct drm_encoder *encoder;
-		struct drm_display_mode *mode, *adjusted_mode;
-
-		if (!new_conn_state->best_encoder)
-			continue;
-
-		encoder = new_conn_state->best_encoder;
-		funcs = encoder->helper_private;
-		new_crtc_state = new_conn_state->crtc->state;
-		mode = &new_crtc_state->mode;
-		adjusted_mode = &new_crtc_state->adjusted_mode;
-
-		if (!new_crtc_state->mode_changed)
-			continue;
-
-		DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n",
-				 encoder->base.id, encoder->name);
-
-		/*
-		 * Each encoder has at most one connector (since we always steal
-		 * it away), so we won't call mode_set hooks twice.
-		 */
-		if (funcs->mode_set)
-			funcs->mode_set(encoder, mode, adjusted_mode);
-
-		drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
-	}
-}
-
-/**
- * msm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
- * @dev: DRM device
- * @old_state: atomic state object with old state structures
- *
- * This function shuts down all the outputs that need to be shut down and
- * prepares them (if required) with the new mode.
- *
- * For compatibility with legacy crtc helpers this should be called before
- * drm_atomic_helper_commit_planes(), which is what the default commit function
- * does. But drivers with different needs can group the modeset commits together
- * and do the plane commits at the end. This is useful for drivers doing runtime
- * PM since planes updates then only happen when the CRTC is actually enabled.
- */
-void msm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
-		struct drm_atomic_state *old_state)
-{
-	msm_disable_outputs(dev, old_state);
-
-	drm_atomic_helper_update_legacy_modeset_state(dev, old_state);
-
-	msm_crtc_set_mode(dev, old_state);
-}
-
 /**
  * msm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs
  * @dev: DRM device
@@ -406,7 +223,7 @@ static void complete_commit(struct msm_commit *c)
 
 	kms->funcs->prepare_commit(kms, state);
 
-	msm_atomic_helper_commit_modeset_disables(dev, state);
+	drm_atomic_helper_commit_modeset_disables(dev, state);
 
 	drm_atomic_helper_commit_planes(dev, state, 0);
 
-- 
Sean Paul, Software Engineer, Google / Chromium OS

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