linux-kernel - Re: [PATCH 08/11] drm/msm/disp/dpu1: Add support for DSC in encoder

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Date:   Mon, 19 Jul 2021 16:54:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     Vinod Koul <vkoul@...nel.org>, Rob Clark <robdclark@...il.com>
Cc:     kbuild-all@...ts.01.org, Jonathan Marek <jonathan@...ek.ca>,
        Jeffrey Hugo <jeffrey.l.hugo@...il.com>,
        David Airlie <airlied@...ux.ie>, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Abhinav Kumar <abhinavk@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Vinod Koul <vkoul@...nel.org>, dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH 08/11] drm/msm/disp/dpu1: Add support for DSC in encoder

Hi Vinod,

I love your patch! Perhaps something to improve:

[auto build test WARNING on v5.13]
[cannot apply to linus/master v5.14-rc1 next-20210716]
[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/Vinod-Koul/drm-msm-Add-Display-Stream-Compression-Support/20210715-145540
base:    62fb9874f5da54fdb243003b386128037319b219
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 10.3.0
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/e61efb569c28d8036eb18f53763c195c16d8a396
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Vinod-Koul/drm-msm-Add-Display-Stream-Compression-Support/20210715-145540
        git checkout e61efb569c28d8036eb18f53763c195c16d8a396
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arm 

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/msm/disp/dpu1/dpu_encoder.c: In function 'dpu_encoder_prep_dsc':
>> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c:1911:17: warning: variable 'pic_height' set but not used [-Wunused-but-set-variable]
    1911 |  int pic_width, pic_height;
         |                 ^~~~~~~~~~


vim +/pic_height +1911 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

  1900	
  1901	static void dpu_encoder_prep_dsc(struct dpu_encoder_virt *dpu_enc,
  1902					 struct msm_display_dsc_config *dsc)
  1903	{
  1904		/* coding only for 2LM, 2enc, 1 dsc config */
  1905		struct dpu_encoder_phys *enc_master = dpu_enc->cur_master;
  1906		struct dpu_hw_dsc *hw_dsc[MAX_CHANNELS_PER_ENC];
  1907		struct dpu_hw_pingpong *hw_pp[MAX_CHANNELS_PER_ENC];
  1908		int this_frame_slices;
  1909		int intf_ip_w, enc_ip_w;
  1910		int dsc_common_mode;
> 1911		int pic_width, pic_height;
  1912		int i;
  1913	
  1914		for (i = 0; i < MAX_CHANNELS_PER_ENC; i++) {
  1915			hw_pp[i] = dpu_enc->hw_pp[i];
  1916			hw_dsc[i] = dpu_enc->hw_dsc[i];
  1917	
  1918			if (!hw_pp[i] || !hw_dsc[i]) {
  1919				DPU_ERROR_ENC(dpu_enc, "invalid params for DSC\n");
  1920				return;
  1921			}
  1922		}
  1923	
  1924		dsc_common_mode = 0;
  1925		pic_width = dsc->drm->pic_width;
  1926		pic_height = dsc->drm->pic_height;
  1927	
  1928		dsc_common_mode = DSC_MODE_MULTIPLEX | DSC_MODE_SPLIT_PANEL;
  1929		if (enc_master->intf_mode == INTF_MODE_VIDEO)
  1930			dsc_common_mode |= DSC_MODE_VIDEO;
  1931	
  1932		this_frame_slices = pic_width / dsc->drm->slice_width;
  1933		intf_ip_w = this_frame_slices * dsc->drm->slice_width;
  1934	
  1935		dpu_encoder_dsc_pclk_param_calc(dsc, intf_ip_w);
  1936	
  1937		/*
  1938		 * dsc merge case: when using 2 encoders for the same stream,
  1939		 * no. of slices need to be same on both the encoders.
  1940		 */
  1941		enc_ip_w = intf_ip_w / 2;
  1942		dpu_encoder_dsc_initial_line_calc(dsc, enc_ip_w);
  1943	
  1944		for (i = 0; i < MAX_CHANNELS_PER_ENC; i++)
  1945			dpu_encoder_dsc_pipe_cfg(hw_dsc[i], hw_pp[i], dsc, dsc_common_mode);
  1946	}
  1947	

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

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