linux-kernel - [PATCH 1/5] drm: Remove unused drm_atomic_helper_commit_planes_on

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Message-ID: <20241022232934.238124-2-linux@treblig.org>
Date: Wed, 23 Oct 2024 00:29:30 +0100
From: linux@...blig.org
To: maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch
Cc: dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	"Dr. David Alan Gilbert" <linux@...blig.org>
Subject: [PATCH 1/5] drm: Remove unused drm_atomic_helper_commit_planes_on_crtc

From: "Dr. David Alan Gilbert" <linux@...blig.org>

The last use of drm_atomic_helper_commit_planes_on_crtc() was removed
in 2018 by
commit 6c246b81f938 ("drm/i915: Replace call to commit_planes_on_crtc with
internal update, v2.")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>
---
 drivers/gpu/drm/drm_atomic_helper.c | 72 -----------------------------
 include/drm/drm_atomic_helper.h     |  1 -
 2 files changed, 73 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 43cdf39019a4..dd8f7d6f5a36 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2705,8 +2705,6 @@ static bool plane_crtc_active(const struct drm_plane_state *state)
  * crtcs need to be updated though.
  *
  * Note that this function does all plane updates across all CRTCs in one step.
- * If the hardware can't support this approach look at
- * drm_atomic_helper_commit_planes_on_crtc() instead.
  *
  * Plane parameters can be updated by applications while the associated CRTC is
  * disabled. The DRM/KMS core will store the parameters in the plane state,
@@ -2833,76 +2831,6 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 }
 EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
 
-/**
- * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a CRTC
- * @old_crtc_state: atomic state object with the old CRTC state
- *
- * This function commits the new plane state using the plane and atomic helper
- * functions for planes on the specific CRTC. It assumes that the atomic state
- * has already been pushed into the relevant object state pointers, since this
- * step can no longer fail.
- *
- * This function is useful when plane updates should be done CRTC-by-CRTC
- * instead of one global step like drm_atomic_helper_commit_planes() does.
- *
- * This function can only be savely used when planes are not allowed to move
- * between different CRTCs because this function doesn't handle inter-CRTC
- * dependencies. Callers need to ensure that either no such dependencies exist,
- * resolve them through ordering of commit calls or through some other means.
- */
-void
-drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
-{
-	const struct drm_crtc_helper_funcs *crtc_funcs;
-	struct drm_crtc *crtc = old_crtc_state->crtc;
-	struct drm_atomic_state *old_state = old_crtc_state->state;
-	struct drm_crtc_state *new_crtc_state =
-		drm_atomic_get_new_crtc_state(old_state, crtc);
-	struct drm_plane *plane;
-	unsigned int plane_mask;
-
-	plane_mask = old_crtc_state->plane_mask;
-	plane_mask |= new_crtc_state->plane_mask;
-
-	crtc_funcs = crtc->helper_private;
-	if (crtc_funcs && crtc_funcs->atomic_begin)
-		crtc_funcs->atomic_begin(crtc, old_state);
-
-	drm_for_each_plane_mask(plane, crtc->dev, plane_mask) {
-		struct drm_plane_state *old_plane_state =
-			drm_atomic_get_old_plane_state(old_state, plane);
-		struct drm_plane_state *new_plane_state =
-			drm_atomic_get_new_plane_state(old_state, plane);
-		const struct drm_plane_helper_funcs *plane_funcs;
-		bool disabling;
-
-		plane_funcs = plane->helper_private;
-
-		if (!old_plane_state || !plane_funcs)
-			continue;
-
-		WARN_ON(new_plane_state->crtc &&
-			new_plane_state->crtc != crtc);
-
-		disabling = drm_atomic_plane_disabling(old_plane_state, new_plane_state);
-
-		if (disabling && plane_funcs->atomic_disable) {
-			plane_funcs->atomic_disable(plane, old_state);
-		} else if (new_plane_state->crtc || disabling) {
-			plane_funcs->atomic_update(plane, old_state);
-
-			if (!disabling && plane_funcs->atomic_enable) {
-				if (drm_atomic_plane_enabling(old_plane_state, new_plane_state))
-					plane_funcs->atomic_enable(plane, old_state);
-			}
-		}
-	}
-
-	if (crtc_funcs && crtc_funcs->atomic_flush)
-		crtc_funcs->atomic_flush(crtc, old_state);
-}
-EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc);
-
 /**
  * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes
  * @old_crtc_state: atomic state object with the old CRTC state
diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index 9aa0a05aa072..6ad50c531fc0 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -107,7 +107,6 @@ void drm_atomic_helper_commit_planes(struct drm_device *dev,
 				     uint32_t flags);
 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
 				      struct drm_atomic_state *old_state);
-void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
 void
 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
 					 bool atomic);
-- 
2.47.0