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authorWu Fengguang <wfg@linux.intel.com>2011-05-03 17:35:19 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-05-10 12:58:43 -0700
commit3ca13bdb3c79e8a5e79ddeddacdae3bd4611ab5d (patch)
tree956c2b211787e3bd12583a30a1f4f30bdd9d340d /drivers/staging/intel_sst/intelmid.c
parentf2b5ea1feb904d483a8cf901562e314988ecc314 (diff)
intel_sst: MRST can only do mono recording
Fix bug $ arecord -Dplughw -c2 Recording WAVE 'stdin' : Unsigned 8 bit, Rate 8000 Hz, Stereo arecord: set_params:1116: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: U8 SUBFORMAT: STD SAMPLE_BITS: 8 FRAME_BITS: 16 CHANNELS: 2 [...] Root cause is, the driver is reporting 2-channel capture capability that is not supported by the MRST hardware. So the plughw plugin end up requesting 2-channel capture which fails. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/intel_sst/intelmid.c')
-rw-r--r--drivers/staging/intel_sst/intelmid.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/staging/intel_sst/intelmid.c b/drivers/staging/intel_sst/intelmid.c
index 61ef4a69216..0b9b1b64c9c 100644
--- a/drivers/staging/intel_sst/intelmid.c
+++ b/drivers/staging/intel_sst/intelmid.c
@@ -335,6 +335,13 @@ static int snd_intelmad_open(struct snd_pcm_substream *substream,
runtime = substream->runtime;
/* set the runtime hw parameter with local snd_pcm_hardware struct */
runtime->hw = snd_intelmad_stream;
+ if (intelmaddata->cpu_id == CPU_CHIP_LINCROFT) {
+ /*
+ * MRST firmware currently denies stereo recording requests.
+ */
+ if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+ runtime->hw.channels_max = 1;
+ }
if (intelmaddata->cpu_id == CPU_CHIP_PENWELL) {
runtime->hw = snd_intelmad_stream;
runtime->hw.rates = SNDRV_PCM_RATE_48000;