Re: [EXT] Re: [PATCH v3 1/2] dt-bindings: display: panel: Add support for Raydium RM67191 panel

[Robert Chiras]

On Vi, 2019-06-21 at 12:46 -0300, Fabio Estevam wrote:
> Caution: EXT Email
> 
> Hi Robert,
> 
> On Fri, Jun 21, 2019 at 11:16 AM Robert Chiras  > wrote:
> 
> > 
> > From what I've seen in the schematics, the power lines on the DSI
> > port
> > on all the i.MX8 cores are coming from a PMIC providing power for
> > all
> > the peripherals. Since I didn't find a way to cut the power on a
> > single
> > peripheral (like DSI, for example) it doesn't make sense for power-
> > supply property. For now, at least.
> This panel driver is not supposed to only work with i.MX8 NXP
> reference boards.
> 
> The dt-bindings should be as accurate as possible from day one, so
> describing the power-supply is important.
> 
> Please look at the panel datasheet and describe the required power
> supplies accordingly.
OK, I will add the power regulators as they are described in panel
datasheet. I just won't be able to test them.
> 
> Thanks

Re: [EXT] Re: [PATCH v3 1/2] dt-bindings: display: panel: Add support for Raydium RM67191 panel

[Fabio Estevam]

Hi Robert,

On Fri, Jun 21, 2019 at 11:16 AM Robert Chiras  wrote:

> From what I've seen in the schematics, the power lines on the DSI port
> on all the i.MX8 cores are coming from a PMIC providing power for all
> the peripherals. Since I didn't find a way to cut the power on a single
> peripheral (like DSI, for example) it doesn't make sense for power-
> supply property. For now, at least.

This panel driver is not supposed to only work with i.MX8 NXP reference boards.

The dt-bindings should be as accurate as possible from day one, so
describing the power-supply is important.

Please look at the panel datasheet and describe the required power
supplies accordingly.

Thanks

Re: [EXT] Re: [PATCH v3 1/2] dt-bindings: display: panel: Add support for Raydium RM67191 panel

[Robert Chiras]

Hi Fabio,

On Vi, 2019-06-21 at 11:00 -0300, Fabio Estevam wrote:
> Hi Robert,
> 
> On Thu, Jun 20, 2019 at 10:32 AM Robert Chiras  > wrote:
> > 
> > 
> > Add dt-bindings documentation for Raydium RM67191 DSI panel.
> > 
> > Signed-off-by: Robert Chiras 
> > Reviewed-by: Sam Ravnborg 
> > ---
> >  .../bindings/display/panel/raydium,rm67191.txt | 39
> > ++
> >  1 file changed, 39 insertions(+)
> >  create mode 100644
> > Documentation/devicetree/bindings/display/panel/raydium,rm67191.txt
> > 
> > diff --git
> > a/Documentation/devicetree/bindings/display/panel/raydium,rm67191.t
> > xt
> > b/Documentation/devicetree/bindings/display/panel/raydium,rm67191.t
> > xt
> > new file mode 100644
> > index 000..52af272
> > --- /dev/null
> > +++
> > b/Documentation/devicetree/bindings/display/panel/raydium,rm67191.t
> > xt
> > @@ -0,0 +1,39 @@
> > +Raydium RM67171 OLED LCD panel with MIPI-DSI protocol
> > +
> > +Required properties:
> > +- compatible:  "raydium,rm67191"
> > +- reg: virtual channel for MIPI-DSI protocol
> > +   must be <0>
> > +- dsi-lanes:   number of DSI lanes to be used
> > +   must be <3> or <4>
> > +- port:input port node with endpoint definition as
> > +   defined in
> > Documentation/devicetree/bindings/graph.txt;
> > +   the input port should be connected to a
> > MIPI-DSI device
> > +   driver
> > +
> > +Optional properties:
> > +- reset-gpios: a GPIO spec for the RST_B GPIO pin
> > +- width-mm:see panel-common.txt
> > +- height-mm:   see panel-common.txt
> > +- video-mode:  0 - burst-mode
> > +   1 - non-burst with sync event
> > +   2 - non-burst with sync po ulse
> No power-supply property?
From what I've seen in the schematics, the power lines on the DSI port
on all the i.MX8 cores are coming from a PMIC providing power for all
the peripherals. Since I didn't find a way to cut the power on a single
peripheral (like DSI, for example) it doesn't make sense for power-
supply property. For now, at least.