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Port Mali Linux Driver on Arndale 5250

Madhusudhana

Hi,

I have Arndale 5250 board which has a mali GPU.  I have downloaded ubuntu images (linaro) based on 3.10.37 kernel and written it to a SD card and it boots successfully.

Now my intention is to boot same board with mainline kernel along with mali driver.  I have downloaded mainline linux kernel from kernel.org and linux GPU driver.

I had taken config and board.dtb file from ubuntu binary and converted into dts file and used the same for building linux kernel. With the image built I was able to boot Arndale 5250 board succussfully.  Next I integrated mali driver as a part of kernel and rebuilt the kernel.  While booting new image on board, mali gpu doesn't get probed/initialized.  It shows following error message

.mali: Platform data not specified

mali: probe of 11800000.mali failed with error -2

Similar error was reported for which suggested solution states the "Platform data not specified" error should now be fixed with the "CONFIG_MALI_PLATFORM_THIRDPARTY_NAME=arndale_octa" option, which includes the "drivers/gpu/arm/midgard/platform/arndale_octa" directory.

But my driver downloaded from malideveloper.arm.com doesn't contain platform data for arndale. 

Please let me know

  1. How to write platform data for Arndale 5250 board
  2. Where can I get ubuntu source code which has mali driver integrated with linux kernel for Arndale 5250

Regards,

Madhu

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  • 0

    Hi Madhu,

    The Mali kernel source that you can download from MaliDeveloper does not come configured for any hardware apart from the Versatile Express reference platform. It is up to the individual wishing to use the driver to do the necessary work to integrate Mali with the platform, including providing the platform configuration files.

    Could I recommend reading through Guillaumes posts which gives the steps required to build the kernel for the Arndale Octa boad.

    I should probably also say, the job of correctly integrating the hardware drivers into a mainline kernel is non-trivial.  I'd strongly suggest making use of the Linaro kernel available for the platform at Linaro Git Hosting  which has the r4p0 release of Mali integrated and can be used with the Linaro binary release found at Linaro Releases. You may also be able to take inspiration from the platform configuration files from the Linaro release to configure your own mainline build.

    The Mali r4p1 release recently went live on MaliDeveloper and can, with a little work, be integrated with the kernel to replace the included r4p1 in the Linaro build should you wish, though in due course I believe Linaro will be doing this work themselves.

    Hope this helps,

    Rich

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  • 0

    Hi Madhu,

    The Mali kernel source that you can download from MaliDeveloper does not come configured for any hardware apart from the Versatile Express reference platform. It is up to the individual wishing to use the driver to do the necessary work to integrate Mali with the platform, including providing the platform configuration files.

    Could I recommend reading through Guillaumes posts which gives the steps required to build the kernel for the Arndale Octa boad.

    I should probably also say, the job of correctly integrating the hardware drivers into a mainline kernel is non-trivial.  I'd strongly suggest making use of the Linaro kernel available for the platform at Linaro Git Hosting  which has the r4p0 release of Mali integrated and can be used with the Linaro binary release found at Linaro Releases. You may also be able to take inspiration from the platform configuration files from the Linaro release to configure your own mainline build.

    The Mali r4p1 release recently went live on MaliDeveloper and can, with a little work, be integrated with the kernel to replace the included r4p1 in the Linaro build should you wish, though in due course I believe Linaro will be doing this work themselves.

    Hope this helps,

    Rich

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