Re: [PATCH 03/10] drm/i915/dsc: move DSC tables to DRM DSC helper

[kernel test robot <lkp@intel.com>]

Hi Dmitry,

I love your patch! Perhaps something to improve:

[auto build test WARNING on drm-misc/drm-misc-next]
[also build test WARNING on drm-intel/for-linux-next drm-intel/for-linux-next-fixes drm/drm-next linus/master v6.2 next-20230228]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Dmitry-Baryshkov/drm-i915-dsc-change-DSC-param-tables-to-follow-the-DSC-model/20230228-193505
base:   git://anongit.freedesktop.org/drm/drm-misc drm-misc-next
patch link:    https://lore.kernel.org/r/20230228113342.2051425-4-dmitry.baryshkov%40linaro.org
patch subject: [PATCH 03/10] drm/i915/dsc: move DSC tables to DRM DSC helper
config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230228/202302282203.ghUPsryf-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 12.1.0
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/intel-lab-lkp/linux/commit/ee048cb6c2ec7f7f92bea6b72e8cd3ef9921993e
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Dmitry-Baryshkov/drm-i915-dsc-change-DSC-param-tables-to-follow-the-DSC-model/20230228-193505
        git checkout ee048cb6c2ec7f7f92bea6b72e8cd3ef9921993e
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/gpu/drm/display/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302282203.ghUPsryf-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/display/drm_dsc_helper.c:635: warning: expecting prototype for drm_dsc_compute_rc_parameters(). Prototype was for drm_dsc_setup_rc_params() instead


vim +635 drivers/gpu/drm/display/drm_dsc_helper.c

   627	
   628	/**
   629	 * drm_dsc_compute_rc_parameters() - Set parameters and limits for RC model in
   630	 * accordance with the DSC 1.1 or 1.2 specification and DSC C Model
   631	 *
   632	 * @vdsc_cfg: DSC Configuration data partially filled by driver
   633	 */
   634	int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg)
 > 635	{
   636		const struct rc_parameters *rc_params;
   637		int i;
   638	
   639		/* fractional BPP is not supported */
   640		if (vdsc_cfg->bits_per_pixel & 0xf)
   641			return -EINVAL;
   642	
   643		rc_params = get_rc_params(vdsc_cfg->bits_per_pixel >> 4,
   644					  vdsc_cfg->bits_per_component);
   645		if (!rc_params)
   646			return -EINVAL;
   647	
   648		vdsc_cfg->first_line_bpg_offset = rc_params->first_line_bpg_offset;
   649		vdsc_cfg->initial_xmit_delay = rc_params->initial_xmit_delay;
   650		vdsc_cfg->initial_offset = rc_params->initial_offset;
   651		vdsc_cfg->flatness_min_qp = rc_params->flatness_min_qp;
   652		vdsc_cfg->flatness_max_qp = rc_params->flatness_max_qp;
   653		vdsc_cfg->rc_quant_incr_limit0 = rc_params->rc_quant_incr_limit0;
   654		vdsc_cfg->rc_quant_incr_limit1 = rc_params->rc_quant_incr_limit1;
   655	
   656		for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
   657			vdsc_cfg->rc_range_params[i].range_min_qp =
   658				rc_params->rc_range_params[i].range_min_qp;
   659			vdsc_cfg->rc_range_params[i].range_max_qp =
   660				rc_params->rc_range_params[i].range_max_qp;
   661			/*
   662			 * Range BPG Offset uses 2's complement and is only a 6 bits. So
   663			 * mask it to get only 6 bits.
   664			 */
   665			vdsc_cfg->rc_range_params[i].range_bpg_offset =
   666				rc_params->rc_range_params[i].range_bpg_offset &
   667				DSC_RANGE_BPG_OFFSET_MASK;
   668		}
   669	
   670		return 0;
   671	}
   672	EXPORT_SYMBOL(drm_dsc_setup_rc_params);
   673	

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