src/patches/suse-2.6.27.39/patches.drivers/alsa-post-ga-ideapad-44khz-fix

   1 From: Takashi Iwai <tiwai@suse.de>
   2 Subject: ALSA: Fix sample rate of Lenovo Ideapad to 44.1kHz
   3 Patch-mainline:
   4 References: bnc#480391
   5
   6 Noises can be heard on analog outputs of (some model of) Lenovo
   7 Ideapad due to the hardware problem, and the only workaround right now
   8 is to fix the sample rate to 44.1kHz.
   9
  10 Signed-off-by: Takashi Iwai <tiwai@suse.de>
  11 Acked-by: Takashi Iwai <tiwai@suse.de>
  12
  13 ---
  14  sound/pci/hda/patch_realtek.c |   34 +++++++++++++++++++++++++++++++---
  15  1 file changed, 31 insertions(+), 3 deletions(-)
  16
  17 --- a/sound/pci/hda/patch_realtek.c
  18 +++ b/sound/pci/hda/patch_realtek.c
  19 @@ -12339,6 +12339,27 @@ static int alc269_auto_create_analog_inp
  20  #define alc269_pcm_digital_playback    alc880_pcm_digital_playback
  21  #define alc269_pcm_digital_capture     alc880_pcm_digital_capture
  22
  23 +static struct hda_pcm_stream alc269_44k_pcm_analog_playback = {
  24 +       .substreams = 1,
  25 +       .channels_min = 2,
  26 +       .channels_max = 8,
  27 +       .rates = SNDRV_PCM_RATE_44100, /* fixed rate */
  28 +       /* NID is set in alc_build_pcms */
  29 +       .ops = {
  30 +               .open = alc880_playback_pcm_open,
  31 +               .prepare = alc880_playback_pcm_prepare,
  32 +               .cleanup = alc880_playback_pcm_cleanup
  33 +       },
  34 +};
  35 +
  36 +static struct hda_pcm_stream alc269_44k_pcm_analog_capture = {
  37 +       .substreams = 1,
  38 +       .channels_min = 2,
  39 +       .channels_max = 2,
  40 +       .rates = SNDRV_PCM_RATE_44100, /* fixed rate */
  41 +       /* NID is set in alc_build_pcms */
  42 +};
  43 +
  44  /*
  45   * BIOS auto configuration
  46   */
  47 @@ -12540,9 +12561,16 @@ static int patch_alc269(struct hda_codec
  48                 setup_preset(spec, &alc269_presets[board_config]);
  49
  50         spec->stream_name_analog = "ALC269 Analog";
  51 -       spec->stream_analog_playback = &alc269_pcm_analog_playback;
  52 -       spec->stream_analog_capture = &alc269_pcm_analog_capture;
  53 -
  54 +       if (codec->subsystem_id == 0x17aa3bf8) {
  55 +               /* Due to a hardware problem on Lenovo Ideadpad, we need to
  56 +                * fix the sample rate of analog I/O to 44.1kHz
  57 +                */
  58 +               spec->stream_analog_playback = &alc269_44k_pcm_analog_playback;
  59 +               spec->stream_analog_capture = &alc269_44k_pcm_analog_capture;
  60 +       } else {
  61 +               spec->stream_analog_playback = &alc269_pcm_analog_playback;
  62 +               spec->stream_analog_capture = &alc269_pcm_analog_capture;
  63 +       }
  64         spec->stream_name_digital = "ALC269 Digital";
  65         spec->stream_digital_playback = &alc269_pcm_digital_playback;
  66         spec->stream_digital_capture = &alc269_pcm_digital_capture;