Hi Maxime,
On Fri, Feb 14, 2020 at 04:44:05PM +0100, Maxime Ripard wrote:
On Fri, Feb 14, 2020 at 03:10:25PM +0200, Laurent Pinchart wrote:
On Fri, Feb 14, 2020 at 01:32:43PM +0100, Maxime Ripard wrote:
SoCs that have multiple TCONs can use the two set of pins on the first TCON to drive a dual-link display. Add a property to enable the dual link.
Signed-off-by: Maxime Ripard maxime@cerno.tech
.../bindings/display/allwinner,sun4i-a10-tcon.yaml | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml index 86ad617d2327..aa6dd8409dbc 100644 --- a/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml +++ b/Documentation/devicetree/bindings/display/allwinner,sun4i-a10-tcon.yaml @@ -105,6 +105,13 @@ properties: - const: edp - const: lvds
- allwinner,lvds-dual-link:
- type: boolean
- description: |
On a SoC with two TCON with LVDS support, the first TCON canoperate over both pins sets to output in a dual-link setup. Thiswill be triggered by setting this property.Could you maybe provide an example of how this property is supposed to be used ? I'm especially wondering what ports are used in that case and how they're connected.
It's pretty trivial to support, it's only a property to set on the encoder node itself.
I'm not really sure what you meant by your question with the ports though :/
I assume that, in the single-link case, you have two TCON instances that operate independently, each of them with one port that models an LVDS connection to a panel. In the dual-link mode, how does that look like ? Does the TCON instance that operate in dual-link mode have two ports in DT ? There are two physical ports, so I think it makes sense to always have two ports in DT. That's what we're doing for the LVDS encoders on R-Car Gen3, in order to specify in DT which LVDS input of the dual-link panel is connected to which LVDS output of the SoC. That allows configuring the LVDS encoder to send the even and odd pixels on the right port.