[PATCH v2 RESEND 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[PATCH v2 RESEND 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Chunfeng Yun]

Add a property to tune usb2 phy's disconnect threshold.
And add a compatible for mt8196.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2: change property name
---
 Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
index 0bed847bb4ad..9017a9c93eb9 100644
--- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
+++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
@@ -50,6 +50,7 @@ properties:
           - mediatek,mt3611-xsphy
           - mediatek,mt3612-xsphy
           - mediatek,mt7988-xsphy
+          - mediatek,mt8196-xsphy
       - const: mediatek,xsphy
 
   reg:
@@ -130,6 +131,13 @@ patternProperties:
         minimum: 1
         maximum: 7
 
+      mediatek,disconnect-threshold:
+        description:
+          The selection of disconnect threshold (U2 phy)
+        $ref: /schemas/types.yaml#/definitions/uint32
+        minimum: 1
+        maximum: 15
+
       mediatek,efuse-intr:
         description:
           The selection of Internal Resistor (U2/U3 phy)
-- 
2.45.2

[PATCH V2 RESEND 2/2] phy: mediatek: xsphy: add support to set disconnect threshold

[Chunfeng Yun]

Add a property to tune usb2 phy's disconnect threshold.

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
v2: change property name
---
 drivers/phy/mediatek/phy-mtk-xsphy.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/mediatek/phy-mtk-xsphy.c b/drivers/phy/mediatek/phy-mtk-xsphy.c
index c0ddb9273cc3..46345e4f4189 100644
--- a/drivers/phy/mediatek/phy-mtk-xsphy.c
+++ b/drivers/phy/mediatek/phy-mtk-xsphy.c
@@ -61,6 +61,7 @@
 #define XSP_USBPHYACR6		((SSUSB_SIFSLV_U2PHY_COM) + 0x018)
 #define P2A6_RG_BC11_SW_EN	BIT(23)
 #define P2A6_RG_OTG_VBUSCMP_EN	BIT(20)
+#define PA6_RG_U2_DISCTH	GENMASK(7, 4)
 
 #define XSP_U2PHYDTM1		((SSUSB_SIFSLV_U2PHY_COM) + 0x06C)
 #define P2D_FORCE_IDDIG		BIT(9)
@@ -107,6 +108,7 @@ struct xsphy_instance {
 	int eye_src;
 	int eye_vrt;
 	int eye_term;
+	int discth;
 };
 
 struct mtk_xsphy {
@@ -256,9 +258,12 @@ static void phy_parse_property(struct mtk_xsphy *xsphy,
 					 &inst->eye_vrt);
 		device_property_read_u32(dev, "mediatek,eye-term",
 					 &inst->eye_term);
-		dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d\n",
+		device_property_read_u32(dev, "mediatek,discth",
+					 &inst->discth);
+		dev_dbg(dev, "intr:%d, src:%d, vrt:%d, term:%d, discth:%d\n",
 			inst->efuse_intr, inst->eye_src,
-			inst->eye_vrt, inst->eye_term);
+			inst->eye_vrt, inst->eye_term,
+			inst->discth);
 		break;
 	case PHY_TYPE_USB3:
 		device_property_read_u32(dev, "mediatek,efuse-intr",
@@ -301,6 +306,9 @@ static void u2_phy_props_set(struct mtk_xsphy *xsphy,
 	if (inst->eye_term)
 		mtk_phy_update_field(pbase + XSP_USBPHYACR1, P2A1_RG_TERM_SEL,
 				     inst->eye_term);
+	if (inst->discth)
+		mtk_phy_update_field(pbase + XSP_USBPHYACR6, PA6_RG_U2_DISCTH,
+				     inst->discth);
 }
 
 static void u3_phy_props_set(struct mtk_xsphy *xsphy,
-- 
2.45.2

Re: [PATCH v2 RESEND 1/2] dt-bindings: phy: mediatek,xsphy: add property to set disconnect threshold

[Conor Dooley]

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On Mon, Apr 13, 2026 at 08:28:35PM +0800, Chunfeng Yun wrote:
> Add a property to tune usb2 phy's disconnect threshold.
> And add a compatible for mt8196.
> 
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> v2: change property name
> ---
>  Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> index 0bed847bb4ad..9017a9c93eb9 100644
> --- a/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> +++ b/Documentation/devicetree/bindings/phy/mediatek,xsphy.yaml
> @@ -50,6 +50,7 @@ properties:
>            - mediatek,mt3611-xsphy
>            - mediatek,mt3612-xsphy
>            - mediatek,mt7988-xsphy
> +          - mediatek,mt8196-xsphy
>        - const: mediatek,xsphy
>  
>    reg:
> @@ -130,6 +131,13 @@ patternProperties:
>          minimum: 1
>          maximum: 7
>  
> +      mediatek,disconnect-threshold:
> +        description:
> +          The selection of disconnect threshold (U2 phy)

Why is this unitless? What does the threshold represent? Time? Voltage?
Something else?

> +        $ref: /schemas/types.yaml#/definitions/uint32
> +        minimum: 1
> +        maximum: 15
> +
>        mediatek,efuse-intr:
>          description:
>            The selection of Internal Resistor (U2/U3 phy)
> -- 
> 2.45.2
> 

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