Hi Trevor, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on asoc/for-next] [also build test WARNING on spi/for-next sound/for-next v5.13-rc6 next-20210617] [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/Trevor-Wu/ASoC-mediatek-Add-supp... base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next config: arc-randconfig-s032-20210618 (attached as .config) compiler: arceb-elf-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/417fbb6c45b9d2593ec42fd1c425d40e4... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Trevor-Wu/ASoC-mediatek-Add-support-for-MT8195-SoC/20210617-135036 git checkout 417fbb6c45b9d2593ec42fd1c425d40e46bbd38e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) sound/soc/mediatek/common/mtk-afe-fe-dai.c:142:37: sparse: expected void volatile [noderef] __iomem *addr sound/soc/mediatek/common/mtk-afe-fe-dai.c:142:37: sparse: got unsigned char *dma_area vim +142 sound/soc/mediatek/common/mtk-afe-fe-dai.c 283b612429a279 Garlic Tseng 2016-06-17 118 283b612429a279 Garlic Tseng 2016-06-17 119 int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream, 283b612429a279 Garlic Tseng 2016-06-17 120 struct snd_pcm_hw_params *params, 283b612429a279 Garlic Tseng 2016-06-17 121 struct snd_soc_dai *dai) 283b612429a279 Garlic Tseng 2016-06-17 122 { 0cd08b10ae3b52 Kuninori Morimoto 2020-07-20 123 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); e4b31b816c472b Ryder Lee 2018-04-25 124 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai); c8ac82127c8363 Kuninori Morimoto 2020-03-23 125 int id = asoc_rtd_to_cpu(rtd, 0)->id; df799b9502edf8 Eason Yen 2019-11-15 126 struct mtk_base_afe_memif *memif = &afe->memif[id]; df799b9502edf8 Eason Yen 2019-11-15 127 int ret; df799b9502edf8 Eason Yen 2019-11-15 128 unsigned int channels = params_channels(params); df799b9502edf8 Eason Yen 2019-11-15 129 unsigned int rate = params_rate(params); df799b9502edf8 Eason Yen 2019-11-15 130 snd_pcm_format_t format = params_format(params); 283b612429a279 Garlic Tseng 2016-06-17 131 df799b9502edf8 Eason Yen 2019-11-15 132 if (afe->request_dram_resource) df799b9502edf8 Eason Yen 2019-11-15 133 afe->request_dram_resource(afe->dev); df799b9502edf8 Eason Yen 2019-11-15 134 df799b9502edf8 Eason Yen 2019-11-15 135 dev_dbg(afe->dev, "%s(), %s, ch %d, rate %d, fmt %d, dma_addr %pad, dma_area %p, dma_bytes 0x%zx\n", df799b9502edf8 Eason Yen 2019-11-15 136 __func__, memif->data->name, df799b9502edf8 Eason Yen 2019-11-15 137 channels, rate, format, df799b9502edf8 Eason Yen 2019-11-15 138 &substream->runtime->dma_addr, df799b9502edf8 Eason Yen 2019-11-15 139 substream->runtime->dma_area, df799b9502edf8 Eason Yen 2019-11-15 140 substream->runtime->dma_bytes); df799b9502edf8 Eason Yen 2019-11-15 141 df799b9502edf8 Eason Yen 2019-11-15 @142 memset_io(substream->runtime->dma_area, 0, df799b9502edf8 Eason Yen 2019-11-15 143 substream->runtime->dma_bytes); df799b9502edf8 Eason Yen 2019-11-15 144 df799b9502edf8 Eason Yen 2019-11-15 145 /* set addr */ df799b9502edf8 Eason Yen 2019-11-15 146 ret = mtk_memif_set_addr(afe, id, df799b9502edf8 Eason Yen 2019-11-15 147 substream->runtime->dma_area, df799b9502edf8 Eason Yen 2019-11-15 148 substream->runtime->dma_addr, df799b9502edf8 Eason Yen 2019-11-15 149 substream->runtime->dma_bytes); df799b9502edf8 Eason Yen 2019-11-15 150 if (ret) { df799b9502edf8 Eason Yen 2019-11-15 151 dev_err(afe->dev, "%s(), error, id %d, set addr, ret %d\n", df799b9502edf8 Eason Yen 2019-11-15 152 __func__, id, ret); df799b9502edf8 Eason Yen 2019-11-15 153 return ret; df799b9502edf8 Eason Yen 2019-11-15 154 } 283b612429a279 Garlic Tseng 2016-06-17 155 283b612429a279 Garlic Tseng 2016-06-17 156 /* set channel */ df799b9502edf8 Eason Yen 2019-11-15 157 ret = mtk_memif_set_channel(afe, id, channels); df799b9502edf8 Eason Yen 2019-11-15 158 if (ret) { df799b9502edf8 Eason Yen 2019-11-15 159 dev_err(afe->dev, "%s(), error, id %d, set channel %d, ret %d\n", df799b9502edf8 Eason Yen 2019-11-15 160 __func__, id, channels, ret); df799b9502edf8 Eason Yen 2019-11-15 161 return ret; 283b612429a279 Garlic Tseng 2016-06-17 162 } 283b612429a279 Garlic Tseng 2016-06-17 163 283b612429a279 Garlic Tseng 2016-06-17 164 /* set rate */ df799b9502edf8 Eason Yen 2019-11-15 165 ret = mtk_memif_set_rate_substream(substream, id, rate); df799b9502edf8 Eason Yen 2019-11-15 166 if (ret) { df799b9502edf8 Eason Yen 2019-11-15 167 dev_err(afe->dev, "%s(), error, id %d, set rate %d, ret %d\n", df799b9502edf8 Eason Yen 2019-11-15 168 __func__, id, rate, ret); df799b9502edf8 Eason Yen 2019-11-15 169 return ret; df799b9502edf8 Eason Yen 2019-11-15 170 } 283b612429a279 Garlic Tseng 2016-06-17 171 df799b9502edf8 Eason Yen 2019-11-15 172 /* set format */ df799b9502edf8 Eason Yen 2019-11-15 173 ret = mtk_memif_set_format(afe, id, format); df799b9502edf8 Eason Yen 2019-11-15 174 if (ret) { df799b9502edf8 Eason Yen 2019-11-15 175 dev_err(afe->dev, "%s(), error, id %d, set format %d, ret %d\n", df799b9502edf8 Eason Yen 2019-11-15 176 __func__, id, format, ret); df799b9502edf8 Eason Yen 2019-11-15 177 return ret; df799b9502edf8 Eason Yen 2019-11-15 178 } 283b612429a279 Garlic Tseng 2016-06-17 179 283b612429a279 Garlic Tseng 2016-06-17 180 return 0; 283b612429a279 Garlic Tseng 2016-06-17 181 } 283b612429a279 Garlic Tseng 2016-06-17 182 EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params); 283b612429a279 Garlic Tseng 2016-06-17 183 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org