linux-kernel - [PATCH 4/5] drm/panel: deprecate old-style panel allocation

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Message-Id: <20250325-b4-panel-refcounting-v1-4-4e2bf5d19c5d@redhat.com>
Date: Tue, 25 Mar 2025 13:24:11 -0400
From: Anusha Srivatsa <asrivats@...hat.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <quic_jesszhan@...cinc.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>, 
 Anusha Srivatsa <asrivats@...hat.com>
Subject: [PATCH 4/5] drm/panel: deprecate old-style panel allocation

Start moving to the new refcounted allocations using
the new API devm_drm_panel_alloc(). Deprecate any other
allocation.

Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
---
 drivers/gpu/drm/drm_panel.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c
index 11a0415bc61f59190ef5eb378d1583c493265e6a..5793011f4938a2d4fb9d84a700817bda317af305 100644
--- a/drivers/gpu/drm/drm_panel.c
+++ b/drivers/gpu/drm/drm_panel.c
@@ -74,8 +74,10 @@ EXPORT_SYMBOL(drm_panel_init);
  * drm_panel_add - add a panel to the global registry
  * @panel: panel to add
  *
- * Add a panel to the global registry so that it can be looked up by display
- * drivers.
+ * Add a panel to the global registry so that it can be looked
+ * up by display drivers. The panel to be added must have been
+ * allocated by devm_drm_panel_alloc(). Old-style allocation by
+ * kzalloc(), devm_kzalloc() and similar is deprecated.
  */
 void drm_panel_add(struct drm_panel *panel)
 {

-- 
2.48.1