[alsa-devel] [PATCH 0/2] Generic HDMI codec: Add channel mapping control

[Arnaud Pouliquen]

Aim of this patch is to add  'Playback Channel Map' control to export 
audio capabilities in term of HDMI sink speakers allocation.
This patch follow discussion initiates here: 
[RFC] ASOC: HDMI audio info frame speaker allocation
http://www.spinics.net/lists/alsa-devel/msg57363.html

The code is fully inspired from HDA driver.
On hw_param, HDMI sink speaker capabilities are exported via TLV ops
and  a CEA allocation is choson, based on ELD information and the number of
channels requested by user.

Mains differences with HDA implementation are:
 - Control is read only
 - Channel swap is not supported. Consequence is that unused channel in
   the mid of CEA audio infoframe channel mapping are considered as
   active.
   example for channel allocation 0x02: FL, FR, 0, FC)
	This configuration is only available for a 4 channels stream.
  - Channel allocation table has been reordered and HDMI 2.0 is not
    supported.

Arnaud Pouliquen (2):
  DRM: add help to get ELD speaker allocation
  ASoC: hdmi-codec: add channel mapping control

 include/drm/drm_edid.h        |  13 ++
 sound/soc/codecs/hdmi-codec.c | 346 +++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 358 insertions(+), 1 deletion(-)

-- 
1.9.1