Hi Geert,

Thank you for the review.

On Wed, Aug 5, 2020 at 12:19 PM Geert Uytterhoeven [off-list ref] wrote:

Hi Prabhakar,

On Thu, Jul 16, 2020 at 7:20 PM Lad Prabhakar
[off-list ref] wrote:

quoted

Add VIN and CSI-2 nodes to RZ/G2H (R8A774E1) SoC dtsi.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marian-Cristian Rotariu <redacted>

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

However, before I queue this in renesas-devel for v5.10, I'd like to
have some clarification about the issue below.

quoted

--- a/arch/arm64/boot/dts/renesas/r8a774e1.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a774e1.dtsi

quoted

+               vin4: video@e6ef4000 {
+                       compatible = "renesas,vin-r8a774e1";
+                       reg = <0 0xe6ef4000 0 0x1000>;
+                       interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
+                       clocks = <&cpg CPG_MOD 807>;
+                       power-domains = <&sysc R8A774E1_PD_ALWAYS_ON>;
+                       resets = <&cpg 807>;
+                       renesas,id = <4>;
+                       status = "disabled";
+
+                       ports {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+
+                               port@1 {
+                                       #address-cells = <1>;
+                                       #size-cells = <0>;

"make dtbs W=1" says:

    arch/arm64/boot/dts/renesas/r8a774e1.dtsi:1562.12-1572.7: Warning
(graph_child_address): /soc/video@e6ef4000/ports/port@1: graph node
has single child node 'endpoint@0', #address-cells/#size-cells are not
necessary

(same for vin5-7 below)

Referring to commit 5e53dbf4edb4d ("arm64: dts: renesas: r8a77990: Fix
VIN endpoint numbering") we definitely need endpoint numbering.
Probably the driver needs to be fixed to handle such cases.

Cheers,
Prabhakar

quoted

+
+                                       reg = <1>;
+
+                                       vin4csi20: endpoint@0 {
+                                               reg = <0>;
+                                               remote-endpoint = <&csi20vin4>;
+                                       };

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