MIPI DSI to HDMI Audio on i.mx8qxpmek over SPDIF

[rutvij_trivedi]

Hi Folks,

I'm using i.mx8qxpmek  and 4.9.51 Distro, I've connected MIPI DSI to HDMI converter having adv7535.
Now my query is its does not seem to have any audio connection provision on i.mx8qxpmek , so i pulled out SPDIF_TX from processor to ADV7535 (MIPI DSI to HDMI Conv.)'s  SPDIF/I2S pin.
SCLK/MCLK and LRCLK are connected with GND at ADV7535 side as from ADV7535 data sheet it says master clock can be ignored.

I've used fsl-imx8mq-evk-dual-display.dts to start HDMI and it works fine with video but how can i get audio working with the above mentioned hardware connection.
I've also gone through AN12188  Rev. 0 , but did not get any clue related to audio.

Requested to en-light me on this.

Thanks & Regards,
Rutvij

[igorpadykov]

Hi Rutvij

for i.MX8QXP MEK should be used Linux L4.9.88 for i.MX 8QuadXPlus Beta2 as described on

Alpha / Beta BSPs for Microprocessors|NXP 

Support for HDMI audio is described in Release Notes for that package:

Documentation

https://www.nxp.com/docs/en/supporting-information/imx-yocto-L4.9.88_2.2.0-8qxp_beta2.tar.gz 

also on fsl-imx8qxp-mek.dts spdif pins are used as enet :
https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/fsl-imx8qxp-...

Seems this support will be added in future linux release.

Best regards
igor
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[rutvij_trivedi]

Hi, Thanks for the reply.

For HDMI(direct) its okay, i've tested audio even and it worked like charm.
But my query is related to MIPI-DSI TO HDMI Converter using bridgr chip adv7735.



Regards,