[PATCH 09/10] drm/tinydrm/mipi-dbi: Add mipi_dbi_init_with_formats()

[David Lechner]

On 7/17/19 6:58 AM, Noralf Trønnes wrote:
> The MIPI DBI standard support more pixel formats than what this helper
> supports. Add an init function that lets the driver use different
> format(s). This avoids open coding mipi_dbi_init() in st7586.
> 
> st7586 sets preferred_depth but this is not necessary since it only
> supports one format.

Although that might not always be the case. FYI, we are finding that
having XRGB8888 for a 2bpp grayscale display is not the greatest. When
we want to do direct drawing on the screen, we haven't found very good
support in existing graphics libraries for embedded systems for this
format. If I had more free time, I would like to look at adding
grayscale support to DRM.

> 
> Cc: David Lechner <david at lechnology.com>
> Signed-off-by: Noralf Trønnes <noralf at tronnes.org>
> ---

Acked-by: David Lechner <david at lechnology.com>