Hi Bogdan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[cannot apply to v5.4-rc1 next-20191004]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Bogdan-Togorean/drm-bridge-adv7511-Enable-SPDIF-DAI/20191004-205455
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=xtensa 

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

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/bridge/adv7511/adv7511_audio.c: In function 'adv7511_hdmi_hw_params':
>> drivers/gpu/drm/bridge/adv7511/adv7511_audio.c:123:16: warning: this statement may fall through [-Wimplicit-fallthrough=]
      audio_source = ADV7511_AUDIO_SOURCE_SPDIF;
   drivers/gpu/drm/bridge/adv7511/adv7511_audio.c:124:2: note: here
     default:
     ^~~~~~~

vim +123 drivers/gpu/drm/bridge/adv7511/adv7511_audio.c

    55	
    56	int adv7511_hdmi_hw_params(struct device *dev, void *data,
    57				   struct hdmi_codec_daifmt *fmt,
    58				   struct hdmi_codec_params *hparms)
    59	{
    60		struct adv7511 *adv7511 = dev_get_drvdata(dev);
    61		unsigned int audio_source, i2s_format = 0;
    62		unsigned int invert_clock;
    63		unsigned int rate;
    64		unsigned int len;
    65	
    66		switch (hparms->sample_rate) {
    67		case 32000:
    68			rate = ADV7511_SAMPLE_FREQ_32000;
    69			break;
    70		case 44100:
    71			rate = ADV7511_SAMPLE_FREQ_44100;
    72			break;
    73		case 48000:
    74			rate = ADV7511_SAMPLE_FREQ_48000;
    75			break;
    76		case 88200:
    77			rate = ADV7511_SAMPLE_FREQ_88200;
    78			break;
    79		case 96000:
    80			rate = ADV7511_SAMPLE_FREQ_96000;
    81			break;
    82		case 176400:
    83			rate = ADV7511_SAMPLE_FREQ_176400;
    84			break;
    85		case 192000:
    86			rate = ADV7511_SAMPLE_FREQ_192000;
    87			break;
    88		default:
    89			return -EINVAL;
    90		}
    91	
    92		switch (hparms->sample_width) {
    93		case 16:
    94			len = ADV7511_I2S_SAMPLE_LEN_16;
    95			break;
    96		case 18:
    97			len = ADV7511_I2S_SAMPLE_LEN_18;
    98			break;
    99		case 20:
   100			len = ADV7511_I2S_SAMPLE_LEN_20;
   101			break;
   102		case 24:
   103			len = ADV7511_I2S_SAMPLE_LEN_24;
   104			break;
   105		default:
   106			return -EINVAL;
   107		}
   108	
   109		switch (fmt->fmt) {
   110		case HDMI_I2S:
   111			audio_source = ADV7511_AUDIO_SOURCE_I2S;
   112			i2s_format = ADV7511_I2S_FORMAT_I2S;
   113			break;
   114		case HDMI_RIGHT_J:
   115			audio_source = ADV7511_AUDIO_SOURCE_I2S;
   116			i2s_format = ADV7511_I2S_FORMAT_RIGHT_J;
   117			break;
   118		case HDMI_LEFT_J:
   119			audio_source = ADV7511_AUDIO_SOURCE_I2S;
   120			i2s_format = ADV7511_I2S_FORMAT_LEFT_J;
   121			break;
   122		case HDMI_SPDIF:
 > 123			audio_source = ADV7511_AUDIO_SOURCE_SPDIF;
   124		default:
   125			return -EINVAL;
   126		}
   127	
   128		invert_clock = fmt->bit_clk_inv;
   129	
   130		regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_SOURCE, 0x70,
   131				   audio_source << 4);
   132		regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CONFIG, BIT(6),
   133				   invert_clock << 6);
   134		regmap_update_bits(adv7511->regmap, ADV7511_REG_I2S_CONFIG, 0x03,
   135				   i2s_format);
   136	
   137		adv7511->audio_source = audio_source;
   138	
   139		adv7511->f_audio = hparms->sample_rate;
   140	
   141		adv7511_update_cts_n(adv7511);
   142	
   143		regmap_update_bits(adv7511->regmap, ADV7511_REG_AUDIO_CFG3,
   144				   ADV7511_AUDIO_CFG3_LEN_MASK, len);
   145		regmap_update_bits(adv7511->regmap, ADV7511_REG_I2C_FREQ_ID_CFG,
   146				   ADV7511_I2C_FREQ_ID_CFG_RATE_MASK, rate << 4);
   147		regmap_write(adv7511->regmap, 0x73, 0x1);
   148	
   149		return 0;
   150	}
   151	

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