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Date: Mon, 1 Mar 2021 17:11:35 +0200
From: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To: Guido Günther <agx@...xcpu.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 3/4] usb: typec: tps6598x: Add trace event for power
status register
On Mon, Feb 15, 2021 at 12:46:44PM +0100, Guido Günther wrote:
> Together with the PD status register this is vital for debugging power
> negotiations at runtime.
>
> Signed-off-by: Guido Günther <agx@...xcpu.org>
Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
> drivers/usb/typec/tps6598x.c | 19 +++++++++------
> drivers/usb/typec/tps6598x.h | 19 +++++++++++++++
> drivers/usb/typec/tps6598x_trace.h | 38 ++++++++++++++++++++++++++++++
> 3 files changed, 69 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/usb/typec/tps6598x.c b/drivers/usb/typec/tps6598x.c
> index 559aa175f948..3e6ad3ba7fc8 100644
> --- a/drivers/usb/typec/tps6598x.c
> +++ b/drivers/usb/typec/tps6598x.c
> @@ -50,11 +50,6 @@ enum {
> TPS_PORTINFO_SOURCE,
> };
>
> -/* TPS_REG_POWER_STATUS bits */
> -#define TPS_POWER_STATUS_CONNECTION BIT(0)
> -#define TPS_POWER_STATUS_SOURCESINK BIT(1)
> -#define TPS_POWER_STATUS_PWROPMODE(p) (((p) & GENMASK(3, 2)) >> 2)
> -
> /* TPS_REG_RX_IDENTITY_SOP */
> struct tps6598x_rx_identity_reg {
> u8 status;
> @@ -414,6 +409,7 @@ static irqreturn_t tps6598x_interrupt(int irq, void *data)
> u64 event1;
> u64 event2;
> u32 status;
> + u16 pwr_status;
> int ret;
>
> mutex_lock(&tps->lock);
> @@ -433,6 +429,15 @@ static irqreturn_t tps6598x_interrupt(int irq, void *data)
> }
> trace_tps6598x_status(status);
>
> + if ((event1 | event2) & TPS_REG_INT_POWER_STATUS_UPDATE) {
> + ret = tps6598x_read16(tps, TPS_REG_POWER_STATUS, &pwr_status);
> + if (ret < 0) {
> + dev_err(tps->dev, "failed to read power status: %d\n", ret);
> + goto err_clear_ints;
> + }
> + trace_tps6598x_power_status(pwr_status);
> + }
> +
> /* Handle plug insert or removal */
> if ((event1 | event2) & TPS_REG_INT_PLUG_EVENT) {
> if (status & TPS_STATUS_PLUG_PRESENT) {
> @@ -497,8 +502,8 @@ static int tps6598x_psy_get_online(struct tps6598x *tps,
> if (ret < 0)
> return ret;
>
> - if ((pwr_status & TPS_POWER_STATUS_CONNECTION) &&
> - (pwr_status & TPS_POWER_STATUS_SOURCESINK)) {
> + if (TPS_POWER_STATUS_CONNECTION(pwr_status) &&
> + TPS_POWER_STATUS_SOURCESINK(pwr_status)) {
> val->intval = 1;
> } else {
> val->intval = 0;
> diff --git a/drivers/usb/typec/tps6598x.h b/drivers/usb/typec/tps6598x.h
> index 621fb336c15d..9a34c020f3e5 100644
> --- a/drivers/usb/typec/tps6598x.h
> +++ b/drivers/usb/typec/tps6598x.h
> @@ -129,4 +129,23 @@
> #define TPS_REG_INT_HARD_RESET BIT(1)
> #define TPS_REG_INT_PD_SOFT_RESET BIT(0)
>
> +/* TPS_REG_POWER_STATUS bits */
> +#define TPS_POWER_STATUS_CONNECTION(x) TPS_FIELD_GET(BIT(0), (x))
> +#define TPS_POWER_STATUS_SOURCESINK(x) TPS_FIELD_GET(BIT(1), (x))
> +#define TPS_POWER_STATUS_BC12_DET(x) TPS_FIELD_GET(BIT(2), (x))
> +
> +#define TPS_POWER_STATUS_TYPEC_CURRENT_MASK GENMASK(3, 2)
> +#define TPS_POWER_STATUS_PWROPMODE(p) TPS_FIELD_GET(TPS_POWER_STATUS_TYPEC_CURRENT_MASK, (p))
> +#define TPS_POWER_STATUS_BC12_STATUS_MASK GENMASK(6, 5)
> +#define TPS_POWER_STATUS_BC12_STATUS(p) TPS_FIELD_GET(TPS_POWER_STATUS_BC12_STATUS_MASK, (p))
> +
> +#define TPS_POWER_STATUS_TYPEC_CURRENT_USB 0
> +#define TPS_POWER_STATUS_TYPEC_CURRENT_1A5 1
> +#define TPS_POWER_STATUS_TYPEC_CURRENT_3A0 2
> +#define TPS_POWER_STATUS_TYPEC_CURRENT_PD 3
> +
> +#define TPS_POWER_STATUS_BC12_STATUS_SDP 0
> +#define TPS_POWER_STATUS_BC12_STATUS_CDP 2
> +#define TPS_POWER_STATUS_BC12_STATUS_DCP 3
> +
> #endif /* __TPS6598X_H__ */
> diff --git a/drivers/usb/typec/tps6598x_trace.h b/drivers/usb/typec/tps6598x_trace.h
> index e0677b9c5c53..78a5a6ca337b 100644
> --- a/drivers/usb/typec/tps6598x_trace.h
> +++ b/drivers/usb/typec/tps6598x_trace.h
> @@ -134,6 +134,24 @@
> { TPS_STATUS_HIGH_VOLAGE_WARNING, "HIGH_VOLAGE_WARNING" }, \
> { TPS_STATUS_HIGH_LOW_VOLTAGE_WARNING, "HIGH_LOW_VOLTAGE_WARNING" })
>
> +#define show_power_status_source_sink(power_status) \
> + __print_symbolic(TPS_POWER_STATUS_SOURCESINK(power_status), \
> + { 1, "sink" }, \
> + { 0, "source" })
> +
> +#define show_power_status_typec_status(power_status) \
> + __print_symbolic(TPS_POWER_STATUS_PWROPMODE(power_status), \
> + { TPS_POWER_STATUS_TYPEC_CURRENT_PD, "pd" }, \
> + { TPS_POWER_STATUS_TYPEC_CURRENT_3A0, "3.0A" }, \
> + { TPS_POWER_STATUS_TYPEC_CURRENT_1A5, "1.5A" }, \
> + { TPS_POWER_STATUS_TYPEC_CURRENT_USB, "usb" })
> +
> +#define show_power_status_bc12_status(power_status) \
> + __print_symbolic(TPS_POWER_STATUS_BC12_STATUS(power_status), \
> + { TPS_POWER_STATUS_BC12_STATUS_DCP, "dcp" }, \
> + { TPS_POWER_STATUS_BC12_STATUS_CDP, "cdp" }, \
> + { TPS_POWER_STATUS_BC12_STATUS_SDP, "sdp" })
> +
> TRACE_EVENT(tps6598x_irq,
> TP_PROTO(u64 event1,
> u64 event2),
> @@ -181,6 +199,26 @@ TRACE_EVENT(tps6598x_status,
> )
> );
>
> +TRACE_EVENT(tps6598x_power_status,
> + TP_PROTO(u16 power_status),
> + TP_ARGS(power_status),
> +
> + TP_STRUCT__entry(
> + __field(u16, power_status)
> + ),
> +
> + TP_fast_assign(
> + __entry->power_status = power_status;
> + ),
> +
> + TP_printk("conn: %d, pwr-role: %s, typec: %s, bc: %s",
> + !!TPS_POWER_STATUS_CONNECTION(__entry->power_status),
> + show_power_status_source_sink(__entry->power_status),
> + show_power_status_typec_status(__entry->power_status),
> + show_power_status_bc12_status(__entry->power_status)
> + )
> +);
> +
> #endif /* _TPS6598X_TRACE_H_ */
>
> /* This part must be outside protection */
> --
> 2.30.0
thanks,
--
heikki
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