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