About Dual Display setting on MCIMX6Q-SDP + MCIMX-LVDS1

[keitanagashima]

Dear All,

Hello. I have a question about Dual Display setting on MCIMX6Q-SDP + MCIMX-LVDS1.

I'd like to use the dual output to LVDS in L3.14.28_1.0.0.

- Output1 : LVDS on MCIMX6Q-SDP

- Output2 : MCIMX-LVDS (Connected to MCIMX6Q-SDP)

Could you tell me the way of above dual output for LVDS?

(I confirmed the FSL's document (Release note, User's guide). But, I couldn't find the setting method.)

Best Regards,

Keita

[art]

Also, please refer to the following thread:

https://community.freescale.com/message/499774#499774

for the details on using dual LVDS on the i.MX6Q-SDP platform.

Have a great day,
Artur

[Rita_Wang]

Hi Keita,

Here do you want to use the two LVDS separate mode or dual mode?
Have a great day,
Dan

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[keitanagashima]

Hi Dan,

We want to use the separate mode (display different contents on the different displays).

Best Regards,

Keita

[BiyongSUN]

It is already different display.

That is why I provide gstreamer command to do playback.

For dual or separate mode, it is application now in 3.10 and later.

[BiyongSUN]

setenv displayinfo 'video=mxcfb0:dev=ldb,bpp=24,if=RGB666  video=mxcfb1:dev=ldb,bpp=24,if=RGB666 video=mxcfb2:dev=none video=mxcfb3:dev=none'
setenv mmcargs 'setenv bootargs console=${console},${baudrate} ${smp} root=${mmcroot} ${displayinfo}'

Gstreamer playback to secondary display:

gst-launch-1.0 playbin uri=file:///media/AVC-1080P-9M_ToS.mkv video-sink="imxv4l2sink device=/dev/video18 disp-width=1920 disp-height=1080"

[keitanagashima]

Hi Biyong,

SABRE-SDP could output to the dual LVDS Display by your command.

Thank you.

But, when I tried to video play on the secondary display, primary GUI display became strange.

(Video play on secondary display was no problem.)

Do you know why is the phenomenon happened?

Best Regards,

Keita

[BiyongSUN]

if you just want to dual same UI on the LVDS0 and LVDS1. And it is the SDP board.

Use the prebuild binary image. Only change the device tree.

Modify the device tree and add  dual-mode; at line 817.

The attached imx6q-sabresd-dul.dtb is what I have tried working fine with  MCIMX6Q-SDP + MCIMX-LVDS1, 3.14.28_1.0.0_ga.

815 &ldb {

816         status = "okay";

817         dual-mode;

818         lvds-channel@0 {

819                 fsl,data-mapping = "spwg";

820                 fsl,data-width = <18>;

821                 status = "okay";

822

823                 display-timings {

824                         native-mode = <&timing0>;

825                         timing0: hsd100pxn1 {

826                                 clock-frequency = <65000000>;

827                                 hactive = <1024>;

imx6qdl-sabresd.dtsi

[BiyongSUN]

It is an application issue now.  

You could try the gstreamer to play back.