On 08/02/2017 08:03 AM, Noralf Tr?nnes wrote:

Please use tinydrm_xrgb8888_to_gray8().

I considered this, but is seems excessive to loop through the entire fb 
twice just to make a 4x6 cursor blink.

You should use this function to enable the regulator and init the
controller. Don't look at mi0283qt it should have been fixed.

ACK. But this is why I was not keen on writing a standalone driver. I 
know some things about kernel development, but not everything. How am I 
supposed to know what is OK to copy from other drivers and what is not? 
And if I am going to be put down as the maintainer of this driver, it 
bothers me that I don't know so much about how it all works.

Why 2 emulation formats?
I chose DRM_FORMAT_XRGB8888 since I expected everything to support it.
Please use only that.

Because my graphics library currently does not work with XRGB8888. ;-)

I can fix the graphics library and drop the RGB565 format in the kernel 
driver.