Hi Laurent,
On Sun, May 20, 2018 at 10:50 AM, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
> On Tuesday, 15 May 2018 15:20:38 EEST Ulrich Hecht wrote:
>> From: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>>
>> The r8a77995 D3 platform has 2 LVDS channels connected to the DU.
>>
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
>> [uli: moved lvds* into the soc node, added PM domains, resets]
>> Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx>
>> ---
>> arch/arm64/boot/dts/renesas/r8a77995.dtsi | 56 ++++++++++++++++++++++++++++
>> 1 file changed, 56 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/renesas/r8a77995.dtsi
>> b/arch/arm64/boot/dts/renesas/r8a77995.dtsi index ba98865..8e78110d 100644
>> --- a/arch/arm64/boot/dts/renesas/r8a77995.dtsi
>> +++ b/arch/arm64/boot/dts/renesas/r8a77995.dtsi
>> @@ -757,12 +757,68 @@
>> port@1 {
>> reg = <1>;
>> du_out_lvds0: endpoint {
>> + remote-endpoint = <&lvds0_in>;
>> };
>> };
>>
>> port@2 {
>> reg = <2>;
>> du_out_lvds1: endpoint {
>> + remote-endpoint = <&lvds1_in>;
>> + };
>> + };
>> + };
>> + };
>> +
>> + lvds0: lvds-encoder@feb90000 {
>> + compatible = "renesas,r8a77995-lvds";
>> + reg = <0 0xfeb90000 0 0x20>;
>> + clocks = <&cpg CPG_MOD 727>;
>> + power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
>> + resets = <&cpg 727>;
>> + status = "disabled";
>> +
>> + ports {
>> + #address-cells = <1>;
>> + #size-cells = <0>;
>> +
>> + port@0 {
>> + reg = <0>;
>> + lvds0_in: endpoint {
>> + remote-endpoint = <&du_out_lvds0>;
>> + };
>> + };
>> +
>> + port@1 {
>> + reg = <1>;
>> + lvds0_out: endpoint {
>> + };
>> + };
>> + };
>> + };
>> +
>> + lvds1: lvds-encoder@feb90100 {
>> + compatible = "renesas,r8a77995-lvds";
>> + reg = <0 0xfeb90100 0 0x20>;
>> + clocks = <&cpg CPG_MOD 727>;
>> + power-domains = <&sysc R8A77995_PD_ALWAYS_ON>;
>> + resets = <&cpg 727>;
>
> While there seems to be a single clock for both LVDS encoders, it appears that
> two separate reset lines are used.
Nice catch!
So you can reset the individual LVDS instances, but not the individual DU
instances. Doh...
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
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
