arm64: dts: qcom: sm8250-xiaomi-elish: add usb pd negotiation support

Message ID 20240227124529.12926-1-lujianhua000@gmail.com
State New
Headers
Series arm64: dts: qcom: sm8250-xiaomi-elish: add usb pd negotiation support |

Commit Message

Jianhua Lu Feb. 27, 2024, 12:45 p.m. UTC
  Add usb pd negotiation, but charging is controlled by pm8150b pmic,
so it can only charge battery with 5W,

Signed-off-by: Jianhua Lu <lujianhua000@gmail.com>
---
 arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
  

Comments

Konrad Dybcio March 1, 2024, 11:58 p.m. UTC | #1
On 27.02.2024 13:45, Jianhua Lu wrote:
> Add usb pd negotiation, but charging is controlled by pm8150b pmic,
> so it can only charge battery with 5W,
> 
> Signed-off-by: Jianhua Lu <lujianhua000@gmail.com>
> ---
>  arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi | 9 ++++++++-
>  1 file changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> index 6f54f50a70b0..ed103b90f4e6 100644
> --- a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> @@ -636,7 +636,8 @@ &pm8150b_typec {
>  	connector {
>  		compatible = "usb-c-connector";
>  
> -		power-role = "source";
> +		op-sink-microwatt = <10000000>;

Is 10W really the minimum value for this tablet to function as a sink?

Is that what the downstream kernel sets?

> +		power-role = "dual";
>  		data-role = "dual";
>  		self-powered;
>  
> @@ -645,6 +646,12 @@ PDO_FIXED_DUAL_ROLE |
>  					 PDO_FIXED_USB_COMM |
>  					 PDO_FIXED_DATA_SWAP)>;
>  
> +		sink-pdos = <PDO_FIXED(5000, 3000,
> +					 PDO_FIXED_DUAL_ROLE |

Please align the PDO_.. against the open brace

> +					 PDO_FIXED_USB_COMM |
> +					 PDO_FIXED_DATA_SWAP)
> +					 PDO_VAR(5000, 12000, 5000)>;

60W max? This is not unheard of, but I'm just making sure you know..

Konrad
  
Jianhua Lu March 2, 2024, 3:05 a.m. UTC | #2
On Sat, Mar 02, 2024 at 12:58:57AM +0100, Konrad Dybcio wrote:
> On 27.02.2024 13:45, Jianhua Lu wrote:
> > Add usb pd negotiation, but charging is controlled by pm8150b pmic,
> > so it can only charge battery with 5W,
> > 
> > Signed-off-by: Jianhua Lu <lujianhua000@gmail.com>
> > ---
> >  arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi | 9 ++++++++-
> >  1 file changed, 8 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> > index 6f54f50a70b0..ed103b90f4e6 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> > @@ -636,7 +636,8 @@ &pm8150b_typec {
> >  	connector {
> >  		compatible = "usb-c-connector";
> >  
> > -		power-role = "source";
> > +		op-sink-microwatt = <10000000>;
> 
> Is 10W really the minimum value for this tablet to function as a sink?
> 
> Is that what the downstream kernel sets?

This value is taken from other device, I will adjust it to minimum
value in Patch v2.
> 
> > +		power-role = "dual";
> >  		data-role = "dual";
> >  		self-powered;
> >  
> > @@ -645,6 +646,12 @@ PDO_FIXED_DUAL_ROLE |
> >  					 PDO_FIXED_USB_COMM |
> >  					 PDO_FIXED_DATA_SWAP)>;
> >  
> > +		sink-pdos = <PDO_FIXED(5000, 3000,
> > +					 PDO_FIXED_DUAL_ROLE |
> 
> Please align the PDO_.. against the open brace

Acked
> 
> > +					 PDO_FIXED_USB_COMM |
> > +					 PDO_FIXED_DATA_SWAP)
> > +					 PDO_VAR(5000, 12000, 5000)>;
> 
> 60W max? This is not unheard of, but I'm just making sure you know..
downstream kernel's pd adapter allowance is 5v or 9v-12v and vendor
charger allowance is 5v-20v...6.2A-3.25A (67W max), so I set it to 60W.
> 
> Konrad
>
  
Jianhua Lu March 2, 2024, 1:01 p.m. UTC | #3
On Sat, Mar 02, 2024 at 12:58:57AM +0100, Konrad Dybcio wrote:
> On 27.02.2024 13:45, Jianhua Lu wrote:
> > Add usb pd negotiation, but charging is controlled by pm8150b pmic,
> > so it can only charge battery with 5W,
> > 
> > Signed-off-by: Jianhua Lu <lujianhua000@gmail.com>
> > ---
> >  arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi | 9 ++++++++-
> >  1 file changed, 8 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> > index 6f54f50a70b0..ed103b90f4e6 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
> > @@ -636,7 +636,8 @@ &pm8150b_typec {
> >  	connector {
> >  		compatible = "usb-c-connector";
> >  
> > -		power-role = "source";
> > +		op-sink-microwatt = <10000000>;
> 
> Is 10W really the minimum value for this tablet to function as a sink?
> 
After testing 1W, 5W and 10W, 10W is the minimum value for this device to function as a
sink.
>
  

Patch

diff --git a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
index 6f54f50a70b0..ed103b90f4e6 100644
--- a/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm8250-xiaomi-elish-common.dtsi
@@ -636,7 +636,8 @@  &pm8150b_typec {
 	connector {
 		compatible = "usb-c-connector";
 
-		power-role = "source";
+		op-sink-microwatt = <10000000>;
+		power-role = "dual";
 		data-role = "dual";
 		self-powered;
 
@@ -645,6 +646,12 @@  PDO_FIXED_DUAL_ROLE |
 					 PDO_FIXED_USB_COMM |
 					 PDO_FIXED_DATA_SWAP)>;
 
+		sink-pdos = <PDO_FIXED(5000, 3000,
+					 PDO_FIXED_DUAL_ROLE |
+					 PDO_FIXED_USB_COMM |
+					 PDO_FIXED_DATA_SWAP)
+					 PDO_VAR(5000, 12000, 5000)>;
+
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;