[PATCH 0/2] Generic HDMI codec: Add channel mapping control
arnaud.pouliquen at st.com
Thu Dec 8 16:37:45 UTC 2016
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
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
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
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(-)
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