Hi,
to give Takashi the context ;)
On Thursday 22 July 2010 13:57:16 Ujfalusi Peter (Nokia-MS/Tampere) wrote:
So let's ask Takashi: Is it possible to use the constraint API for placing HALF_DUPLEX on a stream (modifying bits in the info_flags)?
Is there a clean way to do:
+ switch (wl1273->mode) { + case WL1273_MODE_BT: + pcm->info_flags &= ~SNDRV_PCM_INFO_HALF_DUPLEX; + break; + case WL1273_MODE_FM_RX: + if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { + pr_err("Cannot play in RX mode.\n"); + return -EINVAL; + } + pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX; ^ This
+ break; + case WL1273_MODE_FM_TX: + if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { + pr_err("Cannot capture in TX mode.\n"); + return -EINVAL; + } + pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX; ^ and this
+ break; + default:
with for example the ALSA constraint API?
The info_flags are modified at stream open time.
Thanks, Péter