IMX8QM-MEK: DRM ?

vinothkumars — Thu, 09 Dec 2021 13:02:22 GMT

Dear All,

Hardware: IMX8QM-MEK

Software: Embedded Linux (L5.10.52) Weston Wayland

I have some questions about the DRM and DISPLAY on IMX8QM-MEK board

1. How many drm is present in IMX8QM-MEK board ?

Only one drm - I am right ?

2. Is one drm able to support more display in independent mode ?

it will not support display independent mode if more than one display present and if one drm - am I right ?

3. Is it possible to run more than one weston client on one drm ?

One weston Client for one drm, not more than weston client for one drm - am I right ?

4. Is it possible to make touch input for each display ?

I connected two display and touch is working but I am not getting touch event for secondary display.

Will you please provide the some details or documentation for IMX8QM-MEK display (MIPI-DSI-HDMI) frame flow for along with those questions answered.

@redwan

@DhavalS

Re: IMX8QM-MEK: DRM ?

igorpadykov — Fri, 10 Dec 2021 01:14:30 GMT

Hi Vinothkumar

i.MX DRM drivers folow general Linux DRM framework described in documentation below

https://www.kernel.org/doc/html/latest/gpu/drm-internals.html

so may be suggested to post those questions on kernel mail list:

http://vger.kernel.org/vger-lists.html

In general i.MX8 series support multiple LCDs, one can look for example

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/imx8mq-evk-dual-display.dts?h=lf-5.10.y

Also may be useful

https://lists.freedesktop.org/archives/dri-devel/2015-May/083707.html

Best regards
igor

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Re: IMX8QM-MEK: DRM ?