On 09/17/2014 10:41 PM, Mark Brown wrote:
On Tue, Sep 16, 2014 at 11:40:17PM +0300, Jyri Sarha wrote:
Adds configuration option for HDMI audio support for AM33XX based
boards with NXP TDA998x HDMI transmitter. The audio is connected to
NXP TDA998x trough McASP running in i2s mode.
So, Jean-Francois is also trying to do things with the TDA998x - what's
the story with that, is this joined up at all?
Not really. This basic functionality does not touch tda998x at all on
the fly, but just sets i2s configuation in the beginning and bangs the
bits trough McASP. But as long as the old platform data for tda998x
still works after Jean-Francois' patches I should be safe.
The problem with the Jean-Francois' patches is the DT support. The BBB
HDMI video is implemented trough tilcdc-slave mechanism without a DT
node for the tda encoder, which renders Jean-Francois' approach unusable
for BBB.
The whole tilcdc slave approach may not be the most elegant way to use
the tda driver, but it does not look like it is going to change any time
soon.
Best regards,
Jyri
ps. I have been thinking on something similar to Jean-Francois' patch
for SiI9022 which I have been working on lately. Also I have been
wondering if it would be possible to come up with a generic ASoC codec
component driver or library that could be used with any HDMI encoder to
produce the ASoC codec component. Unfortunately I am in too early stage
to produce anything more concrete.
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