Regarding linuxfb rotate on TMDSSK3358

Ganesh Bhosle

Hello,

I am using TMDSSK3358 for evaluation and using TI SDK "ti-processor-sdk-linux-am335x-evm-02.00.00.00". This EVM board is having 480x272 LCD display.

Running a Qt application on it. I want rotate the screen using linuxfb -> rotate functionality but not able to rotate the screen.

I am using following command before launching the Qt application:

#echo 1 > /sys/class/graphics/fb0/rotate

Can anyone please give me a pointer to resolve this issue.

Thanks,

Ganesh

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

Hi,

The AM335X LCD controller does not support rotation.

0 Ganesh Bhosle over 9 years ago in reply to Biser Gatchev-XID

Prodigy 110 points

Thank you Biser.

does it mean #echo 1 > /sys/class/graphics/fb0/rotate will not affect on LCD functionality?

Actually, I want to interface 800x1280 portrait LCD to the AM335x. My user interface is in landscape (1280x800 screen resolution).

Can it be possible to achieve by modify in driver?

if it is then any pointer is appreciated.

Thanks,
Ganesh

0 Yordan Kovachev over 9 years ago in reply to Ganesh Bhosle

TI__Guru**** 161600 points

Hi,

As Biser said LCD controller does not support rotation, so you cannot modify the driver to rotate your screen.

You can do this on application level (QT graphics lib support rotation), see the following thread:
e2e.ti.com/.../810134

Best Regards,
Yordan

0 Ganesh Bhosle over 9 years ago in reply to Yordan Kovachev

Prodigy 110 points

Thank you Yordan.

I will try it from application level.

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Regarding linuxfb rotate on TMDSSK3358