linux-kernel - [PATCH v2 00/16] Use drm_panel_get/put() in of_drm_find

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250619-b4-of_drm_find_panel_part1-v2-0-0df94aecc43d@redhat.com>
Date: Thu, 19 Jun 2025 14:15:52 -0500
From: Anusha Srivatsa <asrivats@...hat.com>
To: Neil Armstrong <neil.armstrong@...aro.org>, 
 Jessica Zhang <jessica.zhang@....qualcomm.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>, 
 Inki Dae <inki.dae@...sung.com>, Jagan Teki <jagan@...rulasolutions.com>, 
 Marek Szyprowski <m.szyprowski@...sung.com>, 
 Andrzej Hajda <andrzej.hajda@...el.com>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Chen-Yu Tsai <wens@...e.org>, Samuel Holland <samuel@...lland.org>, 
 Seung-Woo Kim <sw0312.kim@...sung.com>, 
 Kyungmin Park <kyungmin.park@...sung.com>, 
 Krzysztof Kozlowski <krzk@...nel.org>, 
 Alim Akhtar <alim.akhtar@...sung.com>, 
 Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>, 
 Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>, 
 Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, 
 Magnus Damm <magnus.damm@...il.com>, Biju Das <biju.das.jz@...renesas.com>, 
 Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
 Alain Volmat <alain.volmat@...s.st.com>, 
 Raphael Gallais-Pou <rgallaispou@...il.com>, Stefan Agner <stefan@...er.ch>, 
 Alison Wang <alison.wang@....com>, Linus Walleij <linus.walleij@...aro.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Mikko Perttunen <mperttunen@...dia.com>, 
 Jonathan Hunter <jonathanh@...dia.com>
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev, 
 linux-samsung-soc@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
 linux-tegra@...r.kernel.org, Anusha Srivatsa <asrivats@...hat.com>, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>
Subject: [PATCH v2 00/16] Use drm_panel_get/put() in of_drm_find_panel()
 and its callers

of_drm_find_panel() returns a pointer to a panel which the caller
holds to either do panel setup with the prepare(), enable() like
panel helpers or for APIs like devm_drm_panel_bridge_add(),
devm_drm_panel_bridge_add_typed() which expect a panel.
Either way, once the driver no longer needs the panel,
put it down with a drm_panel_put()

Signed-off-by: Anusha Srivatsa <asrivats@...hat.com>
---
Changes in v2:
- Get the missing reference in of_drm_find_panel()
- Add changes to all drivers that call of_drm_find_panel() 
- Link to v1: https://lore.kernel.org/r/20250604-of_drm_find_panel_part1-v1-0-c632e12e131d@redhat.com

---
Anusha Srivatsa (16):
      drm/panel: get/put panel reference in drm_panel_add/remove()
      drm/panel: get the panel returned by of_drm_find_panel()
      drm/panel/samsung-dsicm: Keep up with refcounting
      drm/panel/sun4i: Keep up with refcounting
      drm/panel/exynos: Keep up with refcounting
      drm/panel/rcar_du_encoder: Keep up with refcounting
      drm/panel/rz-du: Keep up with refcounting
      drm/bridge/lvds-codec: Keep up with refcounting
      drm/bridge/fsl-ldb: Keep up with refcounting.
      drm/panel/omapdrm: Keep up with refcounting
      drm/panel/sti: Keep up with refcounting
      drm/drm_of: Keep up with refcounting
      drm/fsl-dcu: Keep up with refcounting
      drm/mcde: Keep up with refcounting
      drm/bridge/analogix: Keep up with refcounting
      drm/tegra: Keep up with refcounting

 drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 1 +
 drivers/gpu/drm/bridge/fsl-ldb.c                   | 3 +++
 drivers/gpu/drm/bridge/lvds-codec.c                | 1 +
 drivers/gpu/drm/bridge/samsung-dsim.c              | 1 +
 drivers/gpu/drm/drm_of.c                           | 2 ++
 drivers/gpu/drm/drm_panel.c                        | 6 ++++++
 drivers/gpu/drm/exynos/exynos_drm_dpi.c            | 1 +
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c          | 1 +
 drivers/gpu/drm/mcde/mcde_dsi.c                    | 5 ++++-
 drivers/gpu/drm/omapdrm/dss/output.c               | 6 ++++--
 drivers/gpu/drm/renesas/rcar-du/rcar_du_encoder.c  | 2 ++
 drivers/gpu/drm/renesas/rz-du/rzg2l_du_encoder.c   | 1 +
 drivers/gpu/drm/sti/sti_dvo.c                      | 2 ++
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c             | 2 ++
 drivers/gpu/drm/tegra/dsi.c                        | 1 +
 15 files changed, 32 insertions(+), 3 deletions(-)
---
base-commit: 60ba94338047bb5410a3626ced3380afe9285ed8
change-id: 20250613-b4-of_drm_find_panel_part1-ad57c4f88a0c

Best regards,
-- 
Anusha Srivatsa <asrivats@...hat.com>