Re: [PATCH v5 2/2] arm64: dts: renesas: r8a779a0: falcon-cpu: Add DSI display output

Quoting Geert Uytterhoeven (2021-12-14 10:49:15)

Hi Kieran,

On Tue, Nov 30, 2021 at 5:43 PM Kieran Bingham
[off-list ref] wrote:

quoted

Provide the display output using the sn65dsi86 MIPI DSI bridge

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>

LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
i.e. will queue in renesas-devel for v5.17.

quoted

--- a/arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a779a0-falcon-cpu.dtsi

quoted

@@ -146,6 +190,41 @@ &i2c1 {

        status = "okay";
        clock-frequency = <400000>;
+
+       sn65dsi86@2c {
+               compatible = "ti,sn65dsi86";
+               reg = <0x2c>;
+
+               clocks = <&sn65dsi86_refclk>;
+               clock-names = "refclk";
+
+               interrupt-parent = <&gpio1>;
+               interrupts = <24 IRQ_TYPE_LEVEL_HIGH>;

Does the driver use this interrupt, and is it triggered?

No, it does not currently, but I expect it can be made to do so. Which
is likely a next development task to adapt polling hotplug to interrupt
driven hotplug detection anyway, so I'll try that then.

If yes, as GP1_24 == IRQ0, you can switch from a GPIO to an INTC_EX IRQ,
(don't forget to configure pinctrl) and test the INTC_EX driver.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds