FBTFT driver needs the DMA controller??? Donot want/Donot have to use the DMA

notro / fbtft

Linux Framebuffer drivers for small TFT LCD display modules. Development has moved to https://git.kernel.org/cgit/linux/kernel/git/gregkh/staging.git/tree/drivers/staging/fbtft?h=staging-testing

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FBTFT driver needs the DMA controller??? Donot want/Donot have to use the DMA #503

Closed Balajinp closed 3 years ago

Balajinp commented 6 years ago

Hi, Trying to bring up the SSD1306 controller on other ARM board, not RPI board. For these drivers, whether DMA must??, since I don't want to use the DMA controller. Then how to configure this driver to not use the DMA controller.

Please help.

-Thanks.

Balajinp commented 6 years ago

Checked this, fbtft-core.c, change dma=false, then it will not do the dma.

notro commented 6 years ago

The linux spi subsystem uses dma if the hw supports it, otherwise it doesn't. The dma parameter is gone in the latest linux releases.

github-actions[bot] commented 3 years ago

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