[RFC][PATCH 2/3] drm/modes: Make width-mm/height-mm mandatory in of_get_drm_panel_display_mode()

[Marek Vasut]

On 4/2/22 05:19, Laurent Pinchart wrote:
> On Fri, Apr 01, 2022 at 10:36:24PM +0200, Marek Vasut wrote:
>> On 4/1/22 20:46, Laurent Pinchart wrote:
>>> On Fri, Apr 01, 2022 at 06:37:54PM +0200, Marek Vasut wrote:
>>>> Make the width-mm/height-mm panel properties mandatory in
>>>> of_get_drm_panel_display_mode(), print error message and
>>>> return -ve in case these DT properties are not present.
>>>> This is needed to correctly report panel dimensions.
>>>
>>> Can we guarantee this won't cause a regression ?
>>
>> For the upstream DTs, I think we can.
>> For downstream DTs, we cannot know.
> 
> Are there users of this function whose DT bindings don't require the
> width-mm and height-mm properties ?

There is literally one user of this function upstream:
drivers/gpu/drm/tiny/panel-mipi-dbi.c