Hi Thanks for the patch! Some comments below. Martino Fontana <tinozzo123@xxxxxxxxx> wrote: > When suspending the computer, a Switch Pro Controller connected via USB will lose its internal status. > However, because the USB connection was technically never lost, when resuming the computer, the driver will attempt to communicate with the controller as if nothing happened (and fail). > Because of this, the user was forced to manually disconnect the controller (or to press the sync button on the controller to power it off), so that it can be re-initialized. > > With this patch, the controller will be automatically re-initialized after resuming from suspend. The commit message would read nicer when wrapped around 78 chars or so. > Fixes https://bugzilla.kernel.org/show_bug.cgi?id=216233 > > Signed-off-by: Martino Fontana <tinozzo123@xxxxxxxxx> > --- > drivers/hid/hid-nintendo.c | 178 ++++++++++++++++++++++--------------- > 1 file changed, 106 insertions(+), 72 deletions(-) > > diff --git a/drivers/hid/hid-nintendo.c b/drivers/hid/hid-nintendo.c > index 250f5d2f8..586c7f8d7 100644 > --- a/drivers/hid/hid-nintendo.c > +++ b/drivers/hid/hid-nintendo.c > @@ -2088,7 +2088,9 @@ static int joycon_read_info(struct joycon_ctlr *ctlr) > struct joycon_input_report *report; > > req.subcmd_id = JC_SUBCMD_REQ_DEV_INFO; > + mutex_lock(&ctlr->output_mutex); > ret = joycon_send_subcmd(ctlr, &req, 0, HZ); > + mutex_unlock(&ctlr->output_mutex); > if (ret) { > hid_err(ctlr->hdev, "Failed to get joycon info; ret=%d\n", ret); > return ret; > @@ -2117,6 +2119,88 @@ static int joycon_read_info(struct joycon_ctlr *ctlr) > return 0; > } > > +static int joycon_init(struct hid_device *hdev) > +{ > + struct joycon_ctlr *ctlr = hid_get_drvdata(hdev); > + int ret = 0; > + > + mutex_lock(&ctlr->output_mutex); > + /* if handshake command fails, assume ble pro controller */ > + if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) && > + !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) { > + hid_dbg(hdev, "detected USB controller\n"); > + /* set baudrate for improved latency */ > + ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ); > + if (ret) { > + hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret); > + goto err_mutex; > + } > + /* handshake */ > + ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ); > + if (ret) { > + hid_err(hdev, "Failed handshake; ret=%d\n", ret); > + goto err_mutex; > + } > + /* > + * Set no timeout (to keep controller in USB mode). > + * This doesn't send a response, so ignore the timeout. > + */ > + joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10); > + } else if (jc_type_is_chrggrip(ctlr)) { > + hid_err(hdev, "Failed charging grip handshake\n"); > + ret = -ETIMEDOUT; > + goto err_mutex; > + } > + > + /* get controller calibration data, and parse it */ > + ret = joycon_request_calibration(ctlr); > + if (ret) { > + /* > + * We can function with default calibration, but it may be > + * inaccurate. Provide a warning, and continue on. > + */ > + hid_warn(hdev, "Analog stick positions may be inaccurate\n"); > + } > + > + /* get IMU calibration data, and parse it */ > + ret = joycon_request_imu_calibration(ctlr); > + if (ret) { > + /* > + * We can function with default calibration, but it may be > + * inaccurate. Provide a warning, and continue on. > + */ > + hid_warn(hdev, "Unable to read IMU calibration data\n"); > + } > + > + /* Set the reporting mode to 0x30, which is the full report mode */ > + ret = joycon_set_report_mode(ctlr); > + if (ret) { > + hid_err(hdev, "Failed to set report mode; ret=%d\n", ret); > + goto err_mutex; > + } > + > + /* Enable rumble */ > + ret = joycon_enable_rumble(ctlr); > + if (ret) { > + hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret); > + goto err_mutex; > + } > + > + /* Enable the IMU */ > + ret = joycon_enable_imu(ctlr); > + if (ret) { > + hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret); > + goto err_mutex; > + } > + > + mutex_unlock(&ctlr->output_mutex); > + return 0; > + > +err_mutex: > + mutex_unlock(&ctlr->output_mutex); > + return ret; > +} > + > /* Common handler for parsing inputs */ > static int joycon_ctlr_read_handler(struct joycon_ctlr *ctlr, u8 *data, > int size) > @@ -2248,85 +2332,19 @@ static int nintendo_hid_probe(struct hid_device *hdev, > > hid_device_io_start(hdev); > > - /* Initialize the controller */ > - mutex_lock(&ctlr->output_mutex); > - /* if handshake command fails, assume ble pro controller */ > - if ((jc_type_is_procon(ctlr) || jc_type_is_chrggrip(ctlr)) && > - !joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ)) { > - hid_dbg(hdev, "detected USB controller\n"); > - /* set baudrate for improved latency */ > - ret = joycon_send_usb(ctlr, JC_USB_CMD_BAUDRATE_3M, HZ); > - if (ret) { > - hid_err(hdev, "Failed to set baudrate; ret=%d\n", ret); > - goto err_mutex; > - } > - /* handshake */ > - ret = joycon_send_usb(ctlr, JC_USB_CMD_HANDSHAKE, HZ); > - if (ret) { > - hid_err(hdev, "Failed handshake; ret=%d\n", ret); > - goto err_mutex; > - } > - /* > - * Set no timeout (to keep controller in USB mode). > - * This doesn't send a response, so ignore the timeout. > - */ > - joycon_send_usb(ctlr, JC_USB_CMD_NO_TIMEOUT, HZ/10); > - } else if (jc_type_is_chrggrip(ctlr)) { > - hid_err(hdev, "Failed charging grip handshake\n"); > - ret = -ETIMEDOUT; > - goto err_mutex; > - } > - > - /* get controller calibration data, and parse it */ > - ret = joycon_request_calibration(ctlr); > - if (ret) { > - /* > - * We can function with default calibration, but it may be > - * inaccurate. Provide a warning, and continue on. > - */ > - hid_warn(hdev, "Analog stick positions may be inaccurate\n"); > - } > - > - /* get IMU calibration data, and parse it */ > - ret = joycon_request_imu_calibration(ctlr); > - if (ret) { > - /* > - * We can function with default calibration, but it may be > - * inaccurate. Provide a warning, and continue on. > - */ > - hid_warn(hdev, "Unable to read IMU calibration data\n"); > - } > - > - /* Set the reporting mode to 0x30, which is the full report mode */ > - ret = joycon_set_report_mode(ctlr); > - if (ret) { > - hid_err(hdev, "Failed to set report mode; ret=%d\n", ret); > - goto err_mutex; > - } > - > - /* Enable rumble */ > - ret = joycon_enable_rumble(ctlr); > - if (ret) { > - hid_err(hdev, "Failed to enable rumble; ret=%d\n", ret); > - goto err_mutex; > - } > - > - /* Enable the IMU */ > - ret = joycon_enable_imu(ctlr); > + ret = joycon_init(hdev); > if (ret) { > - hid_err(hdev, "Failed to enable the IMU; ret=%d\n", ret); > - goto err_mutex; > + hid_err(hdev, "Failed to initialize controller; ret=%d\n", ret); > + goto err_close; > } > > ret = joycon_read_info(ctlr); > if (ret) { > hid_err(hdev, "Failed to retrieve controller info; ret=%d\n", > ret); > - goto err_mutex; > + goto err_close; > } > > - mutex_unlock(&ctlr->output_mutex); > - > /* Initialize the leds */ > ret = joycon_leds_create(ctlr); > if (ret) { > @@ -2352,8 +2370,6 @@ static int nintendo_hid_probe(struct hid_device *hdev, > hid_dbg(hdev, "probe - success\n"); > return 0; > > -err_mutex: > - mutex_unlock(&ctlr->output_mutex); > err_close: > hid_hw_close(hdev); > err_stop: > @@ -2383,6 +2399,20 @@ static void nintendo_hid_remove(struct hid_device *hdev) > hid_hw_stop(hdev); > } > > +#ifdef CONFIG_PM > + > +static int nintendo_hid_resume(struct hid_device *hdev) > +{ > + int ret = joycon_init(hdev); > + Removing this empty line would be more consistent with the rest of the code. > + if (ret) > + hid_err(hdev, "Failed to restore controller after resume"); > + > + return ret; > +} > + > +#endif > + > static const struct hid_device_id nintendo_hid_devices[] = { > { HID_USB_DEVICE(USB_VENDOR_ID_NINTENDO, > USB_DEVICE_ID_NINTENDO_PROCON) }, > @@ -2404,6 +2434,10 @@ static struct hid_driver nintendo_hid_driver = { > .probe = nintendo_hid_probe, > .remove = nintendo_hid_remove, > .raw_event = nintendo_hid_event, > + > +#ifdef CONFIG_PM > + .resume = nintendo_hid_resume, We shouldn't mix tabs and spaces for formatting here. Cheers, Silvan > +#endif > }; > module_hid_driver(nintendo_hid_driver); >
