[alsa-devel] [PATCH RFC v2 REPOST 3/8] ASoC: davinci-evm: HDMI audio support for TDA998x trough McASP I2S bus
jsarha at ti.com
Wed Jan 22 10:20:32 CET 2014
On 01/15/2014 05:51 PM, Jean-Francois Moine wrote:
> On Wed, 15 Jan 2014 13:27:21 +0200
> Jyri Sarha <jsarha at ti.com> wrote:
>> From driver/gpu/drm/i2c/tda998x_drv.c. The driver configures CTS_N
>> register statically to a value that works only with 4 byte samples.
>> According to my tests it is possible to support 3 and 2 byte samples too
>> by changing the CTS_N register value, but I am not sure if the
>> configuration can be changed on the fly. My data sheet of the nxp chip
>> is very vague about the register definitions, but I suppose the register
>> configures some clock divider on the chip. HDMI supports only upto 24bit
>> audio and the data sheet states that any extraneous least significant
>> bits are ignored.
> In the tda998x driver, the CTS_N is automatic (AIP_CNTRL_0_ACR_MAN is
> not set).
> Then, in my Cubox (Marvell A510 + tda19988), the 16, 24 and 32 bits
> formats are working well with I2S input at any rate.
Could you refer the kernel version (main line?) and the involved ASoC
drivers so could take I a look if there is something I could do differently?
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