ASoC: msm: Add support to enable SRS feature on DSP

Add new mixer controls for setting SRS parameters which
enables SRS on DSP. Add required structures and commands
for enabling SRS

Change-Id: Ife0c8223c534dd3daad10dd5fec18630da732611
Signed-off-by: Sriranjan Srikantam <cssrika@codeaurora.org>

Conflicts:

	include/sound/apr_audio.h
	sound/soc/msm/msm-pcm-routing.c
ASoC: msm: Fix SRS key not being sent to DSP sometimes problem

SRS parameters are not updated sometimes when new adm session is
opened and DSP picks up invalid key from default values and plays
some undesired demo ring or noise. Fix this by sending the SRS
parameters everytime adm session is opened. Add a flag to check
if SRS is ever enabled and send parameters only if flag is set

Change-Id: Ib22e6ff74e4376936caa510a632a6a3c3727e034
Signed-off-by: Sriranjan Srikantam <cssrika@codeaurora.org>

Conflicts:

	sound/soc/msm/msm-pcm-routing.c
ASoc: msm: Add support for audio recording with EC.

- Add Mixer controls for Reference Rx device to be
used as a endpoint2 in adm open for echo cancellation.
- Add logic to support echo cancellation for audio
recording with fluence topology.

Change-Id: I7b83c3fc1a19fef7826bc8c3671e2565e393566a
Signed-off-by: Jayasena Sangaraboina <jsanga@codeaurora.org>

Conflicts:

	sound/soc/msm/msm-pcm-routing.c
ASoC: msm: update SRS Tru media control structure with rreg initialization

When SRS Tru media topology is enabled the mixer controls set from
userspace are not sent to driver as the validation fails with
the missing field initialization in the structure. Update the same
to receive the SRS parameters from userspace

Change-Id: Ia2bf800a540adf3bcc2a99fc6e0d9b043c826272
Signed-off-by: Subhash Chandra Bose Naripeddy <snariped@codeaurora.org>
ASoC: msm: flush if prior and current backends rate not matching

It is found that during device switch from one backend
with one sample rate to another backend with another sample rate,
the command to QDSP6 ADM which maps audio stream session to a
particular backend would not get carried out until pending
data of audio stream session from previous backend is either
read out or flushed. This scenario occurs when application
stops providing more buffers to retrieve captured data.
Remedy is to flush upon detection of rate mismatching

Change-Id: I2c01c036d9bb71f938a6795337f08948bd986553
CRs-fixed: 422205
Signed-off-by: Patrick Lai <plai@codeaurora.org>
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>

Conflicts:

	sound/soc/msm/msm-pcm-q6.c
	sound/soc/msm/msm-pcm-routing.c
	sound/soc/msm/qdsp6/q6asm.c
ASoc: msm: Fix for pcm_read getting struck in alsa core.

Advance hardware pointer by period size even if the packet
coming from qdsp6 is of less size. QDSP6 sometimes
(for rapid device switches) gives packets worth less
than period size and this results in hw_ptr appl_ptr mismatch.

CRs-Fixed: 486276
CRs-Fixed: 488449
Change-Id: I893f9a52e4cd507fd72e4a7aba3c5fa76527d1bf
Signed-off-by: Sidipotu Ashok <sashok@codeaurora.org>