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Message-ID: <202511080928.8r4OmyWW-lkp@intel.com>
Date: Sat, 8 Nov 2025 09:57:40 +0800
From: kernel test robot <lkp@...el.com>
To: Nilesh Laad <nilesh.laad@....qualcomm.com>,
Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, Marek Vasut <marex@...x.de>
Cc: oe-kbuild-all@...ts.linux.dev, dri-devel@...ts.freedesktop.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Nilesh Laad <nilesh.laad@....qualcomm.com>,
venkata.valluru@....qualcomm.com, jessica.zhang@....qualcomm.com,
Yi Zhang <zhanyi@....qualcomm.com>,
Gopi Botlagunta <venkata.botlagunta@....qualcomm.com>
Subject: Re: [PATCH v2 2/2] drm/bridge: add support for lontium lt9211c bridge
Hi Nilesh,
kernel test robot noticed the following build errors:
[auto build test ERROR on f50b969bafafb2810a07f376387350c4c0d72a21]
url: https://github.com/intel-lab-lkp/linux/commits/Nilesh-Laad/dt-bindings-bridge-lt9211c-Add-bindings/20251107-210546
base: f50b969bafafb2810a07f376387350c4c0d72a21
patch link: https://lore.kernel.org/r/20251107-add-lt9211c-bridge-v2-2-b0616e23407c%40oss.qualcomm.com
patch subject: [PATCH v2 2/2] drm/bridge: add support for lontium lt9211c bridge
config: m68k-allmodconfig (https://download.01.org/0day-ci/archive/20251108/202511080928.8r4OmyWW-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251108/202511080928.8r4OmyWW-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511080928.8r4OmyWW-lkp@intel.com/
All error/warnings (new ones prefixed by >>):
drivers/gpu/drm/bridge/lontium-lt9211c.c: In function 'lt9211c_configure_rx':
>> drivers/gpu/drm/bridge/lontium-lt9211c.c:207:55: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
207 | ret = regmap_write(ctx->regmap, 0x8180, (pval & 0xfc | 0x03));
| ~~~~~^~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c:227:55: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
227 | ret = regmap_write(ctx->regmap, 0x8530, (pval & 0xf8 | 0x11));
| ~~~~~^~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c: In function 'lt9211c_autodetect_rx':
>> drivers/gpu/drm/bridge/lontium-lt9211c.c:253:12: warning: unused variable 'bc' [-Wunused-variable]
253 | u8 bc[3];
| ^~
drivers/gpu/drm/bridge/lontium-lt9211c.c: In function 'lt9211c_configure_tx':
drivers/gpu/drm/bridge/lontium-lt9211c.c:619:55: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
619 | ret = regmap_write(ctx->regmap, 0x8530, (pval & 0x3f | 0x40));
| ~~~~~^~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c: At top level:
>> drivers/gpu/drm/bridge/lontium-lt9211c.c:918:35: error: initialization of 'int (*)(struct drm_bridge *, struct drm_encoder *, enum drm_bridge_attach_flags)' from incompatible pointer type 'int (*)(struct drm_bridge *, enum drm_bridge_attach_flags)' [-Wincompatible-pointer-types]
918 | .attach = lt9211c_attach,
| ^~~~~~~~~~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c:918:35: note: (near initialization for 'lt9211c_funcs.attach')
drivers/gpu/drm/bridge/lontium-lt9211c.c:99:12: note: 'lt9211c_attach' declared here
99 | static int lt9211c_attach(struct drm_bridge *bridge,
| ^~~~~~~~~~~~~~
>> drivers/gpu/drm/bridge/lontium-lt9211c.c:920:35: error: initialization of 'void (*)(struct drm_bridge *, struct drm_atomic_state *)' from incompatible pointer type 'void (*)(struct drm_bridge *, struct drm_bridge_state *)' [-Wincompatible-pointer-types]
920 | .atomic_enable = lt9211c_atomic_enable,
| ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c:920:35: note: (near initialization for 'lt9211c_funcs.atomic_enable')
drivers/gpu/drm/bridge/lontium-lt9211c.c:777:13: note: 'lt9211c_atomic_enable' declared here
777 | static void lt9211c_atomic_enable(struct drm_bridge *bridge,
| ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c:921:35: error: initialization of 'void (*)(struct drm_bridge *, struct drm_atomic_state *)' from incompatible pointer type 'void (*)(struct drm_bridge *, struct drm_bridge_state *)' [-Wincompatible-pointer-types]
921 | .atomic_disable = lt9211c_atomic_disable,
| ^~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/lontium-lt9211c.c:921:35: note: (near initialization for 'lt9211c_funcs.atomic_disable')
drivers/gpu/drm/bridge/lontium-lt9211c.c:857:13: note: 'lt9211c_atomic_disable' declared here
857 | static void lt9211c_atomic_disable(struct drm_bridge *bridge,
| ^~~~~~~~~~~~~~~~~~~~~~
vim +918 drivers/gpu/drm/bridge/lontium-lt9211c.c
916
917 static const struct drm_bridge_funcs lt9211c_funcs = {
> 918 .attach = lt9211c_attach,
919 .mode_valid = lt9211c_mode_valid,
> 920 .atomic_enable = lt9211c_atomic_enable,
921 .atomic_disable = lt9211c_atomic_disable,
922 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
923 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
924 .atomic_get_input_bus_fmts = lt9211c_atomic_get_input_bus_fmts,
925 .atomic_reset = drm_atomic_helper_bridge_reset,
926 };
927
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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