On Thu, Apr 10, 2025 at 12:33:35PM +0300, Dmitry Baryshkov wrote: > On Wed, Apr 09, 2025 at 11:28:46AM +0200, Kory Maincent wrote: > > On Tue, 8 Apr 2025 17:44:32 +0200 > > Maxime Ripard <mrip...@kernel.org> wrote: > > > > > hi, > > > > > > On Tue, Apr 08, 2025 at 05:27:00PM +0200, Kory Maincent wrote: > > > > Add the dsi-lanes property to specify the number of DSI lanes used by > > > > the > > > > panel. This allows configuring the panel for either two, three or four > > > > lanes. > > > > > > > > Signed-off-by: Kory Maincent <kory.mainc...@bootlin.com> > > > > --- > > > > Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml | > > > > 5 > > > > +++++ 1 file changed, 5 insertions(+) > > > > > > > > diff --git > > > > a/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml > > > > b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml > > > > index > > > > baf5dfe5f5ebdd92f460a78d0e56e1b45e7dd323..e36550616f6aac86c79832a48132ce8c11ebcf7a > > > > 100644 --- > > > > a/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml > > > > +++ > > > > b/Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml > > > > @@ > > > > -27,6 +27,11 @@ properties: reg: maxItems: 1 > > > > + dsi-lanes: > > > > + description: Number of DSI lanes to be used must be <2>, <3> or <4> > > > > + $ref: /schemas/types.yaml#/definitions/uint32 > > > > + enum: [2, 3, 4] > > > > + > > > > > > We have the data-lanes property for that already > > > > Indeed but there is no such usage in panel bindings, only in bridge > > bindings. > > It is expected that the DSI host sets mipi_dsi_device::lanes correctly. > If it is not the case, please fix the DSI host driver. The panel driver > can then use this data field in the probe function.
And I should have refreshed my memory before writing the comment... It is checked by DSI host rather than being set by it. > > > > > You are saying that I should add something like that: > > port: > > > > $ref: /schemas/graph.yaml#/properties/port > > > > properties: > > endpoint: > > $ref: /schemas/media/video-interfaces.yaml# > > unevaluatedProperties: false > > > > data-lanes: > > minItems: 2 > > maxItems: 4 > > > > And use drm_of_get_data_lanes_count in the drivers. Yes. > > > > If we do so, maybe this binding should land in panel-common.yaml instead? I'd say, no, because some panels might support single-lane config. You will end up tuning the property in your bindings too. > > > > Regards, > > -- > > Köry Maincent, Bootlin > > Embedded Linux and kernel engineering > > https://bootlin.com > > -- > With best wishes > Dmitry -- With best wishes Dmitry
