Re: [PATCH v1, 3/3] drm/mediatek: gamma set with cmdq

From: kernel test robot <lkp@intel.com>
To: Yongqiang Niu <yongqiang.niu@mediatek.com>,
	Chun-Kuang Hu <chunkuang.hu@kernel.org>,
	Rob Herring <robh+dt@kernel.org>
Cc: kbuild-all@lists.01.org, clang-built-linux@googlegroups.com,
	Philipp Zabel <p.zabel@pengutronix.de>,
	David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Mark Rutland <mark.rutland@arm.com>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v1, 3/3] drm/mediatek: gamma set with cmdq
Date: Tue, 13 Apr 2021 21:32:17 +0800	[thread overview]
Message-ID: <202104132152.liqPUFTL-lkp@intel.com> (raw)
In-Reply-To: <1618209347-10816-4-git-send-email-yongqiang.niu@mediatek.com>

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Hi Yongqiang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on pza/reset/next linus/master v5.12-rc7]
[cannot apply to next-20210413]
[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/Yongqiang-Niu/gamma-set-with-cmdq/20210412-143659
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: arm64-randconfig-r023-20210413 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
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
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://github.com/0day-ci/linux/commit/b562bd6c318f4681373221cc292c78d51cb819e6
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Yongqiang-Niu/gamma-set-with-cmdq/20210412-143659
        git checkout b562bd6c318f4681373221cc292c78d51cb819e6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/mediatek/mtk_disp_gamma.c:76:50: warning: incompatible pointer to integer conversion passing 'void *' to parameter of type 'unsigned int' [-Wint-conversion]
                           mtk_ddp_write(cmdq_pkt, word, cmdq_reg, regs, (lut_base + i * 4));
                                                                         ^~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h:199:19: note: passing argument to parameter 'offset' here
                      unsigned int offset);
                                   ^
   1 warning generated.

vim +76 drivers/gpu/drm/mediatek/mtk_disp_gamma.c

    57	
    58	void mtk_gamma_set_common(void __iomem *regs, struct cmdq_client_reg *cmdq_reg,
    59				  struct drm_crtc_state *state, struct cmdq_pkt *cmdq_pkt)
    60	{
    61		unsigned int i, reg;
    62		struct drm_color_lut *lut;
    63		void __iomem *lut_base;
    64		u32 word;
    65	
    66		if (state->gamma_lut) {
    67			reg = readl(regs + DISP_GAMMA_CFG);
    68			reg = reg | GAMMA_LUT_EN;
    69			mtk_ddp_write(cmdq_pkt, reg, cmdq_reg, regs, DISP_GAMMA_CFG);
    70			lut_base = regs + DISP_GAMMA_LUT;
    71			lut = (struct drm_color_lut *)state->gamma_lut->data;
    72			for (i = 0; i < MTK_LUT_SIZE; i++) {
    73				word = (((lut[i].red >> 6) & LUT_10BIT_MASK) << 20) +
    74					(((lut[i].green >> 6) & LUT_10BIT_MASK) << 10) +
    75					((lut[i].blue >> 6) & LUT_10BIT_MASK);
  > 76				mtk_ddp_write(cmdq_pkt, word, cmdq_reg, regs, (lut_base + i * 4));
    77			}
    78		}
    79	}
    80	

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

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