[alsa-devel] [PATCH v4 0/5] ASoC: hdmi: Preparatory work to support MST audio

[jeeja.kp at intel.com]

From: Jeeja KP <jeeja.kp at intel.com>

Display port 1.2 introduces new capability Multi-stream transport (MST)
which will allow multiple stream to route to single display port where
multiple monitors are connected. Multiple monitors will be connected by
a MST Hub or a monitor capable of daisy-chaining.

With MST support, a pin can support multiple ports and on each port a
monitor can be connected.

This is preparatory patch series to enable DP MST Audio by extending the
current design from pin to port.
o i915 acomp APIs are now used to read the ELD info and support is extended
for MST port as well.

o Configure port/pin/audio infoframe in widget event handlers for dynamic
routing when monitor is connected/disconnected instead of DAI ops. 

o Use set_tdm slot to set the stream tag instead of dai params and store it
in pcm context and use this in configuring the converter in widget event
handler.

o With MST, pin mux for CVT selection will be used to select CVT for
pin-port instead of pin. So create the pin mux accordingly and update the
route in skl/bxt machines.

o add channel map support in bxtn machines.

Note:
o This changes require UCM conf modification, once this series is accepted,
I will post the UCM change.

o This series depends on DRM changes to enable MST and changes are already
merged in 4.10-rc1 branch.

Changes v2:
	Split the patchs to smaller series.

Changes v3:
	o rebased on latest branch 
	o Removed already merged patch.

Changes v4:
	o rebased on latest branch 
	o Removed already merged patch.

Jeeja KP (5):
  ASoC: hdac_hdmi: Begin to add support for DP Multi-stream audio
  ASoC: Intel: Skylake: Add route change to nau88l25_max98357a machine
  ASoC: Intel: Skylake: Add route change to nau88l25_ssm4567 machine
  ASoC: Intel: bxt: Add route change to rt298 machine
  ASoC: hdac_hdmi: Add support to handle MST capable pin

 sound/soc/codecs/hdac_hdmi.c                    | 416 +++++++++++++++---------
 sound/soc/intel/boards/bxt_rt298.c              |   6 +-
 sound/soc/intel/boards/skl_nau88l25_max98357a.c |   8 +-
 sound/soc/intel/boards/skl_nau88l25_ssm4567.c   |   9 +-
 4 files changed, 274 insertions(+), 165 deletions(-)

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2.5.0