Configuring DVI to other resolutions

robertnpatton

Hi,

I am trying to get a QVGA (320x240) display to work with the DVI output. I have tried using fbset to no avail. What is the easiest way to configure the timing registers and why doesn't fbset work?

Thanks for any help.

over 17 years ago

Bernie Thompson TI over 17 years ago

TI__Mastermind 41665 points

The DVI driver on the OMAP3 EVM only currently supports 720p and 480p displays as described in the OMAP3 Linux PSP user's manual. Currently to guarantee proper output timing you would have to go into the display driver source code (OMAP35x_SDK_1.0.0\src\linux\kernel_org\2.6_kernel\drivers\video\omap) and modify the driver to support additional modes.

robertnpatton over 17 years ago in reply to Bernie Thompson TI

Prodigy 30 points

I found the tables that define the DVI 720p and 480p in OMAP35x_SDK_1.0.0\src\linux\kernel_org\2.6_kernel\arch\arm\plat-omap\display.c That table defines the display params, will there be additional changes in the driver\video\omap code besides defining a new table entry?

Bernie Thompson TI over 17 years ago in reply to robertnpatton

TI__Mastermind 41665 points

That is certainly one way to start, though I could not say for sure if you would our would not require additional modifications in the rest of the driver, I have not seen many users utilizing customized DVI timings.

Brijesh Jadav80 over 17 years ago in reply to Bernie Thompson TI

TI__Expert 3925 points

Hi,

You just have to add a new entry in this table to add a new mode.

Thanks,

Brijesh Jadav

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Configuring DVI to other resolutions