Re: [PATCH 2/3] drm/tiny: ili9486: Do not assume 8-bit only SPI controllers

[Carlo Caione]

On 18/11/2022 16:44, Mark Brown wrote:

> > The problem arrives when your controller does support 16-bits, so 
> > your data is not swapped, but you still put the data on the bus 
> > with 8-bit transfers.
>
> Why would you need to use 8 bit transfers if the controller supports
>  16 bits?

No idea why this driver is forcing 8-bit transfers when the controller
supports 16-bits (this is what this patch is fixing).

My theory is that this driver was written with the Raspberry Pi HATs in
mind and (AFAICT) the RPi has an 8-bit only SPI controller so the driver
author didn't bother with anything different.

--
Carlo Caione