[PATCH v3 0/2] drm/imx/lcdc: Implement DRM driver for imx21

[Rob Herring]

On Fri, Dec 16, 2022 at 06:50:04PM +0100, Uwe Kleine-König wrote:
> Hello,
> 
> Changes since v2:
> 
>  - added allOf as Krzysztof requested
>  - reworked driver based on Philipp's comments
>    (improved error handling, different selects, moved driver to a subdirectory,
>    header sorting, drm_err instead of DRM_ERROR, inlined
>    imx_lcdc_check_mode_change, make use of dev_err_probe())
>  
> Krzysztof also pointed out that we're now having two compatibles for a
> single hardware. Admittedly this is unusual, but this is the chance that
> the (bad) compatible identifier imx21-fb gets deprecated. The hardware
> is called LCDC and only the linux (framebuffer) driver is called imxfb.

The problem is you can't have firmware (with the DTB) that supports 
both. Well, you can if you want to have some firmware setting that 
selects which one. Otherwise, it's really an OS problem to decide what 
to use. 

Rob