How to add HDMI and LCD both(Dual display) on latest devicetree supported kernel

[narasimhuluorug]

Hi,

Any one can guide me how to add dual display support on latest kernel with devicetree based on imx6 sabreSD target. I need to create on same two frame buffers needed to support this too.

Thanks in advance.

Thanks & Regards,

Narasimha.

[igorpadykov · Accepted solution]

Hi narasimhulu

dual display is supported by BSP as described on p.23 attached Linux

Guide "Specifying displays", for dts files one can look at sources:

http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/arch/arm/boot/dts/imx6qdl.dtsi?h=im...

http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/arch/arm/boot/dts/imx6q-sabresd.dts...

http://git.freescale.com/git/cgit.cgi/imx/linux-2.6-imx.git/tree/arch/arm/boot/dts/imx6q.dtsi?h=imx_...

Best regards

igor

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[narasimhuluorug]

Hi Igor,

Can you give information regarding the dual display issue with 3.19 kernel if available so. I am working on 3.19 kernel i found lot changes from 3.14 to 3.19. If you have any information please share your suggestions.

Thanks in Advance,

Narasimha

[fabio_estevam]

This patch allows HDMI and LVDS to be used at the same time on a mx6sabresd:

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/arch/arm/boot/dts/imx6qd...

I would suggest you to try a more recent kernel though.

Regards,

Fabio Estevam

[narasimhuluorug]

Hi Fabio,

Thanks for the information but before this applying patch we need to create multiple frame buffers. How to achieve this on this 3.19 kernel or above. As i have scene drivers directory structure has changed compare with 3.14 to 3.19 kernel.

Thanks & Regards,

Narasimha

[narasimhuluorug]

Hi Igor,

Thank you very much for sharing this information. But I want use 3.19 kernel with devicetree supported dualdisplay. If have any information please share me on the same.

Best Regards,

Narasimha