topic Re: DRM FrameBuffer for iMX6ULL in i.MX Processors

DRM FrameBuffer for iMX6ULL

anthonygroyer — Wed, 23 Jan 2019 13:38:53 GMT

Hi,

Right now, iMX6ULL has support for basic framebuffer with CONFIG_FB_MXS in kernel with driver "drivers/video/fbdev/mxsfb.c" and the compatible driver string "fsl,imx28-lcdif".

Is there any DRM Framebuffer support for iMX6ULL ?

The final goal is to use Qt with DRM Framebuffer platform plugin.

I have tester CONFIG_DRM_MXSFB and driver "drivers/gpu/drm/mxsfb/mxsfb_drv.c" with also the compatible driver string "fsl,imx28-lcdif". But I have errors in the kernel log:

mxsfb_drm 21c8000.lcdif: Failed to initialize drm fb helper.
mxsfb_drm 21c8000.lcdif: Failed to init FB CMA area

and also the kernel crashes afterwards.

Thanks

Anthony

Re: DRM FrameBuffer for iMX6ULL

art — Thu, 31 Jan 2019 05:45:32 GMT

There is no DRM Framebuffer and QT support for the iMX6ULL processor since it doesn't have any graphics/video processing acceleration features in hardware.

Have a great day,
Artur

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Re: DRM FrameBuffer for iMX6ULL

anthony_groyer — Thu, 31 Jan 2019 09:41:28 GMT

Hi Artur,

thanks for the reply. Actually, Qt and Qt Quick can be used on iMX6ULL without hardware acceleration:

https://www.kdab.com/qt-quick-without-a-gpu-i-mx6-ull/

But DRM Framebuffer seems not to be possible.

Anthony