[PATCH v4 1/4] drm: bridge: dw_hdmi: Add flag to indicate output port is optional

Marek Vasut marex at denx.de
Mon Jan 6 15:36:26 UTC 2025


On 1/6/25 8:05 AM, Laurent Pinchart wrote:
> On Mon, Jan 06, 2025 at 03:48:52AM +0100, Marek Vasut wrote:
>> On 1/6/25 12:22 AM, Laurent Pinchart wrote:
>>> Hi Marek,
>>
>> Hi,
>>
>>> Thank you for the patch.
>>>
>>> On Sun, Jan 05, 2025 at 08:06:03PM +0100, Marek Vasut wrote:
>>>> Add a flag meant purely to work around broken i.MX8MP DTs which enable
>>>> HDMI but do not contain the HDMI connector node. This flag allows such
>>>> DTs to work by creating the connector in the HDMI bridge driver. Do not
>>>> use this flag, do not proliferate this flag, please fix your DTs and add
>>>> the connector node this way:
>>>>
>>>> ```
>>>> / {
>>>>       hdmi-connector {
>>>>           compatible = "hdmi-connector";
>>>>           label = "FIXME-Board-Specific-Connector-Label"; // Modify this
>>>>           type = "a";
>>>>
>>>>           port {
>>>>               hdmi_connector_in: endpoint {
>>>>                   remote-endpoint = <&hdmi_tx_out>;
>>>>               };
>>>>           };
>>>>       };
>>>> };
>>>>
>>>> &hdmi_tx {
>>>>       ...
>>>>
>>>>       ports {
>>>>           port at 1 {
>>>>               hdmi_tx_out: endpoint {
>>>>                   remote-endpoint = <&hdmi_connector_in>;
>>>>               };
>>>>           };
>>>>       };
>>>> };
>>>> ```
>>>
>>> Are there any in-tree DT sources that use the old bindings ?
>>
>> See
>> https://lore.kernel.org/dri-devel/AM7PR04MB704688150ACD5D209290246A98092@AM7PR04MB7046.eurprd04.prod.outlook.com/
> 
> Maybe I'm missing something obvious, but where is the patch series that
> moves the DT sources mentioned in that mail thread to the new bindings ?
Since this optional flag is added, that DT update series can be done 
separately.


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