i.MX Processors中的主题 Re: LVDS + HDMI clone mode from IPU

LVDS + HDMI clone mode from IPU

rick_man — Fri, 09 Nov 2018 23:28:56 GMT

Hi ,

We have gone through all the device tree and forums,

i.mx6q Enable Dual Display of Ubuntu

imx6q dual display LVDS +HDMI has problem `

We have the DUAL lvds clone mode already working but we want LVDS + HDMI to work in clone mode.

Any help on this regards will help,

Thanks,

-Rick.

Re: LVDS + HDMI clone mode from IPU

igorpadykov — Mon, 12 Nov 2018 11:05:54 GMT

Hi Rick

unfortunately such case is not supported in nxp bsps, maybe helps attached experimental patch for L3.0.35,

display cloning use case for i.MX6DQ SabreAI: sending the same IPU DI content to LVDS and HDMI, in the same time.
For example, have IPU0 DI0 to drive both LDB and HDMI.

Video parameters should be: video=mxcfb0:dev=ldb,LDB-XGA,if=RGB24 ldb=sin0 video=mxcfb1:dev=hdmi,1024x768@60,if=RGB24

Best regards
igor
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Re: LVDS + HDMI clone mode from IPU

sergei_p — Thu, 28 Mar 2019 15:18:52 GMT

Hello Igor,

Could you please comment on the status of such use case (IMX6Q clone LVDS/LCD display to HDMI) in the recent NXP 4.14.78 BSP? Does it have such use case?

Thanks!

Regards,

Sergei

Re: LVDS + HDMI clone mode from IPU

igorpadykov — Fri, 29 Mar 2019 02:20:04 GMT

Hi Sergei

no it is not officially supported.

Best regards
igor

Re: LVDS + HDMI clone mode from IPU

sergei_p — Tue, 02 Apr 2019 09:46:26 GMT

I'm sorry for being so stubborn, but here is what I see in the Android N7.1.2_2.0.0 Release notes document, Table 2 "Features":

...

UI (dual display,
LVDS+HDMI, UI
mirror displayed
on second
device)

...

This feature is supported on the IMX6Q boards for Android, out-of-box.

Could please someone explain, on the technical level, what needs to be done in the Linux kernel to get the LCD/HDMI mirrored mode working on Linux? Perhaps, I need to configure IPU to use the same ipu_id and display_id for both controllers?

Re: LVDS + HDMI clone mode from IPU

xiaolong_zhang — Thu, 18 Jul 2019 01:05:07 GMT

i have the same problem. my kernel 3.0.35,cpu imx.6Q, QT4.8.5; i get the patch,but it can not disaply in the same time.

Re: LVDS + HDMI clone mode from IPU

igorpadykov — Thu, 18 Jul 2019 08:07:17 GMT

dual display is described in sect.3.4.3 Booting with dual displays: LVDS and HDMI displays

attached Android_Quick_Start_Guide.pdf found on

i.MX Software | NXP

Best regards
igor