Gitweb:     http://git.kernel.org/linus/f03d3115a6bcb814019d945c50c2ef91e5f14477
Commit:     f03d3115a6bcb814019d945c50c2ef91e5f14477
Parent:     37db623ae2a7bde234a8ed683d0d13d6f939199c
Author:     Takashi Iwai <tiwai@suse.de>
AuthorDate: Thu Mar 5 14:18:16 2009 +0100
Committer:  Takashi Iwai <tiwai@suse.de>
CommitDate: Thu Mar 5 14:18:26 2009 +0100

    ALSA: Fix sample rate of Lenovo Ideapad to 44.1kHz
    
    Noises can be heard on analog outputs of (some model of) Lenovo
    Ideapad due to the hardware problem, and the only workaround right now
    is to fix the sample rate to 44.1kHz.
    
    Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c |   34 +++++++++++++++++++++++++++++++---
 1 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 6325ea4..b794cba 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -12845,6 +12845,27 @@ static int alc269_auto_create_analog_input_ctls(struct alc_spec *spec,
 #define alc269_pcm_digital_playback	alc880_pcm_digital_playback
 #define alc269_pcm_digital_capture	alc880_pcm_digital_capture
 
+static struct hda_pcm_stream alc269_44k_pcm_analog_playback = {
+	.substreams = 1,
+	.channels_min = 2,
+	.channels_max = 8,
+	.rates = SNDRV_PCM_RATE_44100, /* fixed rate */
+	/* NID is set in alc_build_pcms */
+	.ops = {
+		.open = alc880_playback_pcm_open,
+		.prepare = alc880_playback_pcm_prepare,
+		.cleanup = alc880_playback_pcm_cleanup
+	},
+};
+
+static struct hda_pcm_stream alc269_44k_pcm_analog_capture = {
+	.substreams = 1,
+	.channels_min = 2,
+	.channels_max = 2,
+	.rates = SNDRV_PCM_RATE_44100, /* fixed rate */
+	/* NID is set in alc_build_pcms */
+};
+
 /*
  * BIOS auto configuration
  */
@@ -13060,9 +13081,16 @@ static int patch_alc269(struct hda_codec *codec)
 		setup_preset(spec, &alc269_presets[board_config]);
 
 	spec->stream_name_analog = "ALC269 Analog";
-	spec->stream_analog_playback = &alc269_pcm_analog_playback;
-	spec->stream_analog_capture = &alc269_pcm_analog_capture;
-
+	if (codec->subsystem_id == 0x17aa3bf8) {
+		/* Due to a hardware problem on Lenovo Ideadpad, we need to
+		 * fix the sample rate of analog I/O to 44.1kHz
+		 */
+		spec->stream_analog_playback = &alc269_44k_pcm_analog_playback;
+		spec->stream_analog_capture = &alc269_44k_pcm_analog_capture;
+	} else {
+		spec->stream_analog_playback = &alc269_pcm_analog_playback;
+		spec->stream_analog_capture = &alc269_pcm_analog_capture;
+	}
 	spec->stream_name_digital = "ALC269 Digital";
 	spec->stream_digital_playback = &alc269_pcm_digital_playback;
 	spec->stream_digital_capture = &alc269_pcm_digital_capture;
--
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