linux-kernel - [PATCH 38/39] drm/atomic: Convert drm_atomic_get_private_obj

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Message-Id: <20250825-drm-no-more-existing-state-v1-38-f08ccd9f85c9@kernel.org>
Date: Mon, 25 Aug 2025 15:43:43 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Thomas Zimmermann <tzimmermann@...e.de>, David Airlie <airlied@...il.com>, 
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Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-mips@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-samsung-soc@...r.kernel.org, imx@...ts.linux.dev, 
 linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org, 
 freedreno@...ts.freedesktop.org, linux-rockchip@...ts.infradead.org, 
 linux-sunxi@...ts.linux.dev, linux-tegra@...r.kernel.org, 
 Maxime Ripard <mripard@...nel.org>
Subject: [PATCH 38/39] drm/atomic: Convert
 drm_atomic_get_private_obj_state() to use new plane state

The drm_atomic_get_private_obj_state() function tries to find if a
private_obj had already been allocated and was part of the given
drm_atomic_state. If one is found, it returns the existing state
pointer.

At the point in time where drm_atomic_get_private_obj_state() can be
called (ie, during atomic_check), the existing state is the new state
and we can thus replace the hand-crafted logic by a call to
drm_atomic_get_new_private_obj_state().

Signed-off-by: Maxime Ripard <mripard@...nel.org>
---
 drivers/gpu/drm/drm_atomic.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 6d92f13d489f299aea5cd14f900ae766588462da..b7bef44e2d42eb56446a5a05f851c7503daeaa1f 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -829,18 +829,18 @@ EXPORT_SYMBOL(drm_atomic_private_obj_fini);
  */
 struct drm_private_state *
 drm_atomic_get_private_obj_state(struct drm_atomic_state *state,
 				 struct drm_private_obj *obj)
 {
-	int index, num_objs, i, ret;
+	int index, num_objs, ret;
 	size_t size;
 	struct __drm_private_objs_state *arr;
 	struct drm_private_state *obj_state;
 
-	for (i = 0; i < state->num_private_objs; i++)
-		if (obj == state->private_objs[i].ptr)
-			return state->private_objs[i].state;
+	obj_state = drm_atomic_get_new_private_obj_state(state, obj);
+	if (obj_state)
+		return obj_state;
 
 	ret = drm_modeset_lock(&obj->lock, state->acquire_ctx);
 	if (ret)
 		return ERR_PTR(ret);
 

-- 
2.50.1