Re: [PATCH] dt-bindings: display: panel: Make DSI panels port optional

[Krzysztof Kozlowski]

On 11/11/2026 14:52, Maxime Ripard wrote:
> On Wed, Nov 11, 2026 at 01:44:23PM +0100, Krzysztof Kozlowski wrote:
>> On 11/11/2026 13:37, Dmitry Baryshkov wrote:
>>> On Wed, Nov 11, 2026 at 01:31:39PM +0100, Krzysztof Kozlowski wrote:
>>>> On 11/11/2026 13:30, Krzysztof Kozlowski wrote:
>>>>> On 11/11/2026 12:13, Maxime Ripard wrote:
>>>>>> On Wed, Nov 11, 2026 at 12:03:39PM +0100, Krzysztof Kozlowski wrote:
>>>>>>> DSI panels can be placed under DSI bus directly and many Linux DRM
>>>>>>> drivers will work fine with it: mipi_dsi_host_register() adds device for
>>>>>>> such panel and DRM driver does not use OF graph to configure lanes.
>>>>>>
>>>>>> That's not true. We do use the endpoints to configure the lanes through
>>>>>> the data-lanes property. See drm_of_get_data_lanes*
>>>>>
>>>>> Some drivers use endpoints, some not. As discussed on other thread,
>>>>> there are more than which do not.
>>>>
>>>> "there are more than one which do not."
>>>
>>> Which means that those should be fixed. We have legacy cases where the
>>> drivers assumed that, but we should not target legacy.
>>
>> These legacy drivers work fine for 10 or 15 years, like Exynos.
>>
>> You can improve them, for sure, but if no one does that then requiring a
>> graph is a mistake there, from the panel point of view.
> 
> At the very least the commit log needs some work then, because the
> situation you describe in it is simply wrong, and quite different to the
> situation you then described.


Commit msg said:
"many Linux DRM drivers will work fine with it"

So many->some? Is this the only problem? What else is not described in
commit msg?


Best regards,
Krzysztof