Hi Timur,
On Mon, Aug 6, 2012 at 8:33 PM, Tabi Timur-B04825 B04825@freescale.com wrote:
On Mon, Aug 6, 2012 at 2:58 PM, Fabio Estevam festevam@gmail.com wrote:
Do you know if mono playback used to work previously in imx-ssi?
I doubt it. I don't think the I2S standard allows for mono playback, so the SSI would need to send the same sample twice, and I don't see any support for that feature in the RM.
When I wrote fsl_ssi, I couldn't find any way to get mono playback to work.
BTW, I can't find the original patch in my inbox or the mailing list archives. When was it sent?
I sent the patch from FSL and it was blocked because I am not subscribed in alsa-devel list from my FSL account.
The original patch I sent was the following and it allowed me to play a mono track:
From bc46087110bd48a41f1f7dcb826853349662c766 Mon Sep 17 00:00:00 2001
From: Fabio Estevam fabio.estevam@freescale.com Date: Mon, 6 Aug 2012 16:30:51 -0300 Subject: [PATCH] ASoC: imx-ssi: Fix mono playback
Currently mono playback is played on a faster rate.
Adjust channels_min to 2 channels in order to play it back correctly.
Reported-by: Gaëtan Carlier gcembed@gmail.com Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- sound/soc/fsl/imx-ssi.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/sound/soc/fsl/imx-ssi.c b/sound/soc/fsl/imx-ssi.c index 28dd76c..c42df31 100644 --- a/sound/soc/fsl/imx-ssi.c +++ b/sound/soc/fsl/imx-ssi.c @@ -380,7 +380,7 @@ static int imx_ssi_dai_probe(struct snd_soc_dai *dai) static struct snd_soc_dai_driver imx_ssi_dai = { .probe = imx_ssi_dai_probe, .playback = { - .channels_min = 1, + .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_8000_96000, .formats = SNDRV_PCM_FMTBIT_S16_LE,