Hi Noralf, On Fri, Feb 03, 2017 at 07:48:51PM +0100, Noralf Trønnes wrote: > > Den 03.02.2017 10.59, skrev Maxime Ripard: > > Hi, > > > > Here is an attempt at supporting the ST7789V LCD controller from Sitronix. > > What happens if there's another panel driven by ST7789V that needs > a different controller initialization? You know those panels / controllers much better than I do, but why would that be the case? > Maybe it's better to name it after the panel, not the controller. I guess you could also use that panel directly without the controller? > > It is controlled through an SPI bus, with a twist, since each byte sent > > must be prefixed by a bit, which needs an 9-bits-per-word SPI controller, > > which is quite rare. Else, you would need to bitbang it. > > It's possible to support SPI controllers that can't do 9-bit by using > 8-bit mode and blocks of 9 bytes to send 8x 9-bit words padded with > zeroes. Zero is MIPI DCS no-op command. Ah, yes, that makes sense. Thanks for the hint. Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com
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