ALSA: hda - Fix the connection selection of ADCs on Cirrus codecs

spec->cur_adc isn't set until cs_capture_pcm_prepare() is called although
the driver tries to select the connection at init time and at auto-mic
switch.  This results in the access to the widget NID 0, which is
obviously invalid, also a wrong capture source.

This patch fixes the issue by issuing the connect-select verb conditionally
at appropriate places.

Reported-and-tested-by: Dylan Reid <dgreid@chromium.org>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_cirrus.c b/sound/pci/hda/patch_cirrus.c
index 2a2d8645ba0933e8e9e20ef3bd33a656f1bb69c5..2fbab8e29576bb236ce51fd5f4050bc0283843b6 100644 (file)
--- a/sound/pci/hda/patch_cirrus.c
+++ b/sound/pci/hda/patch_cirrus.c
@@ -237,6 +237,15 @@ static int cs_dig_playback_pcm_cleanup(struct hda_pcm_stream *hinfo,
        return snd_hda_multi_out_dig_cleanup(codec, &spec->multiout);
 }
 
+static void cs_update_input_select(struct hda_codec *codec)
+{
+       struct cs_spec *spec = codec->spec;
+       if (spec->cur_adc)
+               snd_hda_codec_write(codec, spec->cur_adc, 0,
+                                   AC_VERB_SET_CONNECT_SEL,
+                                   spec->adc_idx[spec->cur_input]);
+}
+
 /*
  * Analog capture
  */
@@ -250,6 +259,7 @@ static int cs_capture_pcm_prepare(struct hda_pcm_stream *hinfo,
        spec->cur_adc = spec->adc_nid[spec->cur_input];
        spec->cur_adc_stream_tag = stream_tag;
        spec->cur_adc_format = format;
+       cs_update_input_select(codec);
        snd_hda_codec_setup_stream(codec, spec->cur_adc, stream_tag, 0, format);
        return 0;
 }
@@ -689,10 +699,8 @@ static int change_cur_input(struct hda_codec *codec, unsigned int idx,
                                           spec->cur_adc_stream_tag, 0,
                                           spec->cur_adc_format);
        }
-       snd_hda_codec_write(codec, spec->cur_adc, 0,
-                           AC_VERB_SET_CONNECT_SEL,
-                           spec->adc_idx[idx]);
        spec->cur_input = idx;
+       cs_update_input_select(codec);
        return 1;
 }
 
@@ -973,10 +981,7 @@ static void cs_automic(struct hda_codec *codec)
                } else  {
                        spec->cur_input = spec->last_input;
                }
-
-               snd_hda_codec_write_cache(codec, spec->cur_adc, 0,
-                                       AC_VERB_SET_CONNECT_SEL,
-                                       spec->adc_idx[spec->cur_input]);
+               cs_update_input_select(codec);
        } else {
                if (present)
                        change_cur_input(codec, spec->automic_idx, 0);
@@ -1073,9 +1078,7 @@ static void init_input(struct hda_codec *codec)
                        cs_automic(codec);
                else  {
                        spec->cur_adc = spec->adc_nid[spec->cur_input];
-                       snd_hda_codec_write(codec, spec->cur_adc, 0,
-                                       AC_VERB_SET_CONNECT_SEL,
-                                       spec->adc_idx[spec->cur_input]);
+                       cs_update_input_select(codec);
                }
        } else {
                change_cur_input(codec, spec->cur_input, 1);