mirror of
https://github.com/followmsi/android_kernel_google_msm.git
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dec3f44a64
When compressed and pcm session is started the buffer pull will Be from the DSP, in mmap mode for the scenario Hardware pointer Is same as application pointer implies application has not filled the Buffer to be send to DSP, and platform driver has to break and restart The de queue process when the application has sufficient buffers. When hardware pointer is same as application pointer it is an under run Scenario where the ALSA framework has to trigger the under run and in HAL The session has to re-prepare and re-triggered. based on the stop Threshold, but in our system the stop threshold is INT_MAX which Indicates that under run is not triggered in practical cases. We have a brodcast usecase in which the mentioned under run case Is hit mulitple times, and every time re-prepare and re-trigger will be Expensive Update the ASoC core framework to restart de queue process stopped By platform Driver when the under run is hit, based on the available Buffer and render flag, so the System will recover from the hang state. To restart de queue process the ASoC core will be calling the restart Callback registered by platform driver and this callback will be running in Atomic context. Change-Id: Ic9ea05a0dc6246346e9913493232882e2f5447d1 Signed-off-by: Santosh Mardi <gsantosh@codeaurora.org> |
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| .. | ||
| oss | ||
| seq | ||
| compress_offload.c | ||
| control.c | ||
| control_compat.c | ||
| ctljack.c | ||
| device.c | ||
| hrtimer.c | ||
| hwdep.c | ||
| hwdep_compat.c | ||
| info.c | ||
| info_oss.c | ||
| init.c | ||
| isadma.c | ||
| jack.c | ||
| Kconfig | ||
| Makefile | ||
| memalloc.c | ||
| memory.c | ||
| misc.c | ||
| pcm.c | ||
| pcm_compat.c | ||
| pcm_lib.c | ||
| pcm_memory.c | ||
| pcm_misc.c | ||
| pcm_native.c | ||
| pcm_timer.c | ||
| rawmidi.c | ||
| rawmidi_compat.c | ||
| rtctimer.c | ||
| sgbuf.c | ||
| sound.c | ||
| sound_oss.c | ||
| timer.c | ||
| timer_compat.c | ||
| vmaster.c | ||