linux-kernel - Re: [PATCH v9 1/4] drm/lsdc: add drm driver for loongson display controller

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Date:   Thu, 17 Feb 2022 22:18:14 +0800
From:   kernel test robot <lkp@...el.com>
To:     Sui Jingfeng <15330273260@....cn>,
        Maxime Ripard <mripard@...nel.org>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Roland Scheidegger <sroland@...are.com>,
        Zack Rusin <zackr@...are.com>,
        Christian Gmeiner <christian.gmeiner@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Dan Carpenter <error27@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Andrey Zhizhikin <andrey.zhizhikin@...ca-geosystems.com>,
        Sam Ravnborg <sam@...nborg.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Lucas Stach <l.stach@...gutronix.de>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Ilia Mirkin <imirkin@...m.mit.edu>,
        Qing Zhang <zhangqing@...ngson.cn>,
        suijingfeng <suijingfeng@...ngson.cn>
Cc:     kbuild-all@...ts.01.org, devicetree@...r.kernel.org,
        kernel test robot <lkp@...el.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-mips@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v9 1/4] drm/lsdc: add drm driver for loongson display
 controller

Hi Sui,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on drm/drm-next]
[also build test WARNING on robh/for-next v5.17-rc4 next-20220217]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Sui-Jingfeng/drm-lsdc-add-drm-driver-for-loongson-display-controller/20220217-185718
base:   git://anongit.freedesktop.org/drm/drm drm-next
config: alpha-buildonly-randconfig-r001-20220217 (https://download.01.org/0day-ci/archive/20220217/202202172257.4uMfltD8-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/822d08dcd4408130e10897446cfdd640bcd53c8a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sui-Jingfeng/drm-lsdc-add-drm-driver-for-loongson-display-controller/20220217-185718
        git checkout 822d08dcd4408130e10897446cfdd640bcd53c8a
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=alpha SHELL=/bin/bash drivers/gpu/drm/lsdc/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/lsdc/lsdc_plane.c: In function 'lsdc_cursor_atomic_disable':
>> drivers/gpu/drm/lsdc/lsdc_plane.c:420:26: warning: variable 'crtc' set but not used [-Wunused-but-set-variable]
     420 |         struct drm_crtc *crtc;
         |                          ^~~~


vim +/crtc +420 drivers/gpu/drm/lsdc/lsdc_plane.c

   413	
   414	static void lsdc_cursor_atomic_disable(struct drm_plane *plane,
   415					       struct drm_atomic_state *state)
   416	{
   417		struct drm_device *ddev = plane->dev;
   418		struct lsdc_device *ldev = to_lsdc(ddev);
   419		struct drm_plane_state *old_plane_state;
 > 420		struct drm_crtc *crtc;
   421	
   422		old_plane_state = drm_atomic_get_old_plane_state(state, plane);
   423	
   424		if (old_plane_state)
   425			crtc = old_plane_state->crtc;
   426	
   427		lsdc_reg_write32(ldev, LSDC_CURSOR_CFG_REG, 0);
   428	
   429		drm_dbg(ddev, "%s disabled\n", plane->name);
   430	}
   431	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org