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Message-ID: <44e8142f-d9b3-487b-83fe-39deadddb492@linaro.org>
Date: Mon, 11 Mar 2024 18:28:41 +0100
From: neil.armstrong@...aro.org
To: Jameson Thies <jthies@...gle.com>, heikki.krogerus@...ux.intel.com,
linux-usb@...r.kernel.org
Cc: pmalani@...omium.org, bleung@...gle.com, abhishekpandit@...omium.org,
andersson@...nel.org, dmitry.baryshkov@...aro.org,
fabrice.gasnier@...s.st.com, gregkh@...uxfoundation.org,
hdegoede@...hat.com, rajaram.regupathy@...el.com, saranya.gopal@...el.com,
linux-kernel@...r.kernel.org, Benson Leung <bleung@...omium.org>,
Linux regressions mailing list <regressions@...ts.linux.dev>
Subject: Re: [PATCH v4 2/4] usb: typec: ucsi: Register cables based on
GET_CABLE_PROPERTY
Hi,
On 05/03/2024 03:58, Jameson Thies wrote:
> Register cables with the Type-C Connector Class in the UCSI driver based
> on the PPM response to GET_CABLE_PROPERTY. Registered cable properties
> include plug type, cable type and major revision.
>
> Reviewed-by: Benson Leung <bleung@...omium.org>
> Reviewed-by: Prashant Malani <pmalani@...omium.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Signed-off-by: Jameson Thies <jthies@...gle.com>
> ---
> Expected cable properties populate the USB Type-C connector class sysfs
> paths:
> nospike-rev4 /sys/class/typec # ls port0-cable
> device identity plug_type port0-plug0 power subsystem type uevent
> usb_power_delivery_revision
>
> Changes in v4:
> - None.
>
> Changes in v3:
> - None.
>
> Changes in v2:
> - Shortened lines to within 80 characters.
> - Tested on usb-testing branch merged with chromeOS 6.8-rc2 kernel.
>
> drivers/usb/typec/ucsi/ucsi.c | 73 +++++++++++++++++++++++++++++++++++
> drivers/usb/typec/ucsi/ucsi.h | 5 +++
> 2 files changed, 78 insertions(+)
Since those were merged, I see the following errors on SM8550-QRD and SM8650-QRD running linux-next:
[ 8.668966] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: UCSI_GET_PD_MESSAGE failed (-95)
[ 11.170560] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: GET_CABLE_PROPERTY failed (-95)
[ 16.361678] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: timeout waiting for UCSI sync write response
[ 21.409633] ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: error -ETIMEDOUT: PPM init failed
perhaps you should check the GET_CAPABILITY.bmOptionalFeatures bit 5 (Cable details supported) and 8 (GET_PD_MESSAGE supported)
before sending UCSI_GET_PD_MESSAGE and GET_CABLE_PROPERTY messages ?
With:
=================><====================================
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index cf52cb34d285..eec64a4c8cdd 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -1189,8 +1189,10 @@ static void ucsi_handle_connector_change(struct work_struct *work)
ucsi_register_partner(con);
ucsi_partner_task(con, ucsi_check_connection, 1, HZ);
ucsi_partner_task(con, ucsi_check_connector_capability, 1, HZ);
- ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ);
- ucsi_partner_task(con, ucsi_check_cable, 1, HZ);
+ if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE)
+ ucsi_partner_task(con, ucsi_get_partner_identity, 1, HZ);
+ if (con->ucsi->cap.features & UCSI_CAP_CABLE_DETAILS)
+ ucsi_partner_task(con, ucsi_check_cable, 1, HZ);
if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
UCSI_CONSTAT_PWR_OPMODE_PD)
@@ -1589,8 +1591,10 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con)
ucsi_register_partner(con);
ucsi_pwr_opmode_change(con);
ucsi_port_psy_changed(con);
- ucsi_get_partner_identity(con);
- ucsi_check_cable(con);
+ if (con->ucsi->cap.features & UCSI_CAP_GET_PD_MESSAGE)
+ ucsi_get_partner_identity(con);
+ if (con->ucsi->cap.features & UCSI_CAP_CABLE_DETAILS)
+ ucsi_check_cable(con);
}
/* Only notify USB controller if partner supports USB data */
diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
index 32daf5f58650..2e9c35a3af27 100644
--- a/drivers/usb/typec/ucsi/ucsi.h
+++ b/drivers/usb/typec/ucsi/ucsi.h
@@ -215,6 +215,7 @@ struct ucsi_capability {
#define UCSI_CAP_CABLE_DETAILS BIT(5)
#define UCSI_CAP_EXT_SUPPLY_NOTIFICATIONS BIT(6)
#define UCSI_CAP_PD_RESET BIT(7)
+#define UCSI_CAP_GET_PD_MESSAGE BIT(8)
u16 reserved_1;
u8 num_alt_modes;
u8 reserved_2;
=================><====================================
it works fine again.
#regzbot introduced: 38ca416597b0
Thanks,
Neil
>
> diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
> index ae105383e69e7..7c84687b5d1a3 100644
> --- a/drivers/usb/typec/ucsi/ucsi.c
> +++ b/drivers/usb/typec/ucsi/ucsi.c
> @@ -734,6 +734,52 @@ static void ucsi_unregister_partner_pdos(struct ucsi_connector *con)
> con->partner_pd = NULL;
> }
>
> +static int ucsi_register_cable(struct ucsi_connector *con)
> +{
> + struct typec_cable *cable;
> + struct typec_cable_desc desc = {};
> +
> + switch (UCSI_CABLE_PROP_FLAG_PLUG_TYPE(con->cable_prop.flags)) {
> + case UCSI_CABLE_PROPERTY_PLUG_TYPE_A:
> + desc.type = USB_PLUG_TYPE_A;
> + break;
> + case UCSI_CABLE_PROPERTY_PLUG_TYPE_B:
> + desc.type = USB_PLUG_TYPE_B;
> + break;
> + case UCSI_CABLE_PROPERTY_PLUG_TYPE_C:
> + desc.type = USB_PLUG_TYPE_C;
> + break;
> + default:
> + desc.type = USB_PLUG_NONE;
> + break;
> + }
> +
> + desc.active = !!(UCSI_CABLE_PROP_FLAG_ACTIVE_CABLE &
> + con->cable_prop.flags);
> + desc.pd_revision = UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(
> + con->cable_prop.flags);
> +
> + cable = typec_register_cable(con->port, &desc);
> + if (IS_ERR(cable)) {
> + dev_err(con->ucsi->dev,
> + "con%d: failed to register cable (%ld)\n", con->num,
> + PTR_ERR(cable));
> + return PTR_ERR(cable);
> + }
> +
> + con->cable = cable;
> + return 0;
> +}
> +
> +static void ucsi_unregister_cable(struct ucsi_connector *con)
> +{
> + if (!con->cable)
> + return;
> +
> + typec_unregister_cable(con->cable);
> + con->cable = NULL;
> +}
> +
> static void ucsi_pwr_opmode_change(struct ucsi_connector *con)
> {
> switch (UCSI_CONSTAT_PWR_OPMODE(con->status.flags)) {
> @@ -807,6 +853,7 @@ static void ucsi_unregister_partner(struct ucsi_connector *con)
> typec_partner_set_usb_power_delivery(con->partner, NULL);
> ucsi_unregister_partner_pdos(con);
> ucsi_unregister_altmodes(con, UCSI_RECIPIENT_SOP);
> + ucsi_unregister_cable(con);
> typec_unregister_partner(con->partner);
> con->partner = NULL;
> }
> @@ -907,6 +954,30 @@ static int ucsi_check_connection(struct ucsi_connector *con)
> return 0;
> }
>
> +static int ucsi_check_cable(struct ucsi_connector *con)
> +{
> + u64 command;
> + int ret;
> +
> + if (con->cable)
> + return 0;
> +
> + command = UCSI_GET_CABLE_PROPERTY | UCSI_CONNECTOR_NUMBER(con->num);
> + ret = ucsi_send_command(con->ucsi, command, &con->cable_prop,
> + sizeof(con->cable_prop));
> + if (ret < 0) {
> + dev_err(con->ucsi->dev, "GET_CABLE_PROPERTY failed (%d)\n",
> + ret);
> + return ret;
> + }
> +
> + ret = ucsi_register_cable(con);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> static void ucsi_handle_connector_change(struct work_struct *work)
> {
> struct ucsi_connector *con = container_of(work, struct ucsi_connector,
> @@ -948,6 +1019,7 @@ static void ucsi_handle_connector_change(struct work_struct *work)
> ucsi_register_partner(con);
> ucsi_partner_task(con, ucsi_check_connection, 1, HZ);
> ucsi_partner_task(con, ucsi_check_connector_capability, 1, HZ);
> + ucsi_partner_task(con, ucsi_check_cable, 1, HZ);
>
> if (UCSI_CONSTAT_PWR_OPMODE(con->status.flags) ==
> UCSI_CONSTAT_PWR_OPMODE_PD)
> @@ -1346,6 +1418,7 @@ static int ucsi_register_port(struct ucsi *ucsi, struct ucsi_connector *con)
> ucsi_register_partner(con);
> ucsi_pwr_opmode_change(con);
> ucsi_port_psy_changed(con);
> + ucsi_check_cable(con);
> }
>
> /* Only notify USB controller if partner supports USB data */
> diff --git a/drivers/usb/typec/ucsi/ucsi.h b/drivers/usb/typec/ucsi/ucsi.h
> index 469a2baf472e4..f0aabef0b7c64 100644
> --- a/drivers/usb/typec/ucsi/ucsi.h
> +++ b/drivers/usb/typec/ucsi/ucsi.h
> @@ -265,6 +265,9 @@ struct ucsi_cable_property {
> #define UCSI_CABLE_PROPERTY_PLUG_TYPE_C 2
> #define UCSI_CABLE_PROPERTY_PLUG_OTHER 3
> #define UCSI_CABLE_PROP_FLAG_MODE_SUPPORT BIT(5)
> +#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_) (((_f_) & GENMASK(7, 6)) >> 6)
> +#define UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV_AS_BCD(_f_) \
> + UCSI_SPEC_REVISION_TO_BCD(UCSI_CABLE_PROP_FLAG_PD_MAJOR_REV(_f_))
> u8 latency;
> } __packed;
>
> @@ -400,6 +403,7 @@ struct ucsi_connector {
>
> struct typec_port *port;
> struct typec_partner *partner;
> + struct typec_cable *cable;
>
> struct typec_altmode *port_altmode[UCSI_MAX_ALTMODES];
> struct typec_altmode *partner_altmode[UCSI_MAX_ALTMODES];
> @@ -408,6 +412,7 @@ struct ucsi_connector {
>
> struct ucsi_connector_status status;
> struct ucsi_connector_capability cap;
> + struct ucsi_cable_property cable_prop;
> struct power_supply *psy;
> struct power_supply_desc psy_desc;
> u32 rdo;
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