diff mbox series

[v1,5/7] HID: playstation: DS4: Parse minimal report 0x01

Message ID 20240115144538.12018-6-max@enpas.org
State New
Headers
Series HID: playstation: DS4: LED bugfix, third-party gamepad support |

Commit Message

Max Staudt Jan. 15, 2024, 2:45 p.m. UTC 
  Some third-party controllers never switch to the full 0x11 report.

They keep sending the short 0x01 report, so let's parse that instead.

Signed-off-by: Max Staudt <max@enpas.org>
---
 drivers/hid/hid-playstation.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

Comments

Roderick Colenbrander Jan. 25, 2024, 12:54 a.m. UTC | #1 
Hi Max,

On Mon, Jan 15, 2024 at 6:52 AM Max Staudt <max@enpas.org> wrote:
>
> Some third-party controllers never switch to the full 0x11 report.
>
> They keep sending the short 0x01 report, so let's parse that instead.
>
> Signed-off-by: Max Staudt <max@enpas.org>
> ---
>  drivers/hid/hid-playstation.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
> index 2bf44bd3cc8a..086b0768fa51 100644
> --- a/drivers/hid/hid-playstation.c
> +++ b/drivers/hid/hid-playstation.c
> @@ -287,6 +287,8 @@ struct dualsense_output_report {
>
>  #define DS4_INPUT_REPORT_USB                   0x01
>  #define DS4_INPUT_REPORT_USB_SIZE              64
> +#define DS4_INPUT_REPORT_BT_MINIMAL            0x01
> +#define DS4_INPUT_REPORT_BT_MINIMAL_SIZE       10
>  #define DS4_INPUT_REPORT_BT                    0x11
>  #define DS4_INPUT_REPORT_BT_SIZE               78
>  #define DS4_OUTPUT_REPORT_USB                  0x05
> @@ -2198,6 +2200,7 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
>         int battery_status, i, j;
>         uint16_t sensor_timestamp;
>         unsigned long flags;
> +       bool is_minimal = false;
>
>         /*
>          * DualShock4 in USB uses the full HID report for reportID 1, but
> @@ -2225,6 +2228,18 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
>                 ds4_report = &bt->common;
>                 num_touch_reports = bt->num_touch_reports;
>                 touch_reports = bt->touch_reports;
> +       } else if (hdev->bus == BUS_BLUETOOTH &&
> +                  report->id == DS4_INPUT_REPORT_BT_MINIMAL &&
> +                        size == DS4_INPUT_REPORT_BT_MINIMAL_SIZE) {
> +               /* Some third-party pads never switch to the full 0x11 report.
> +                * The short 0x01 report is 10 bytes long:
> +                *   u8 report_id == 0x01
> +                *   u8 first_bytes_of_full_report[9]
> +                * So let's reuse the full report parser, and stop it after
> +                * parsing the buttons.
> +                */
> +               ds4_report = (struct dualshock4_input_report_common *)&data[1];
> +               is_minimal = true;
>         } else {
>                 hid_err(hdev, "Unhandled reportID=%d\n", report->id);
>                 return -1;
> @@ -2258,6 +2273,9 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
>         input_report_key(ds4->gamepad, BTN_MODE,   ds4_report->buttons[2] & DS_BUTTONS2_PS_HOME);
>         input_sync(ds4->gamepad);
>
> +       if (is_minimal)
> +               goto finish_minimal;
> +

I would say let's turn this into a 'return 0'. The goto is not useful
since there is no need for any common cleanup or some other common
logic later.

>         /* Parse and calibrate gyroscope data. */
>         for (i = 0; i < ARRAY_SIZE(ds4_report->gyro); i++) {
>                 int raw_data = (short)le16_to_cpu(ds4_report->gyro[i]);
> @@ -2365,6 +2383,7 @@ static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
>         ps_dev->battery_status = battery_status;
>         spin_unlock_irqrestore(&ps_dev->lock, flags);
>
> +finish_minimal:
>         return 0;
>  }
>
> --
> 2.39.2
>
>

Thanks,
Roderick
Max Staudt Jan. 27, 2024, 9 a.m. UTC | #2 
On 1/25/24 09:54, Roderick Colenbrander wrote:
> I would say let's turn this into a 'return 0'. The goto is not useful
> since there is no need for any common cleanup or some other common
> logic later.

Oops, that one slipped through the cracks.

Thank you, will do!


Max
diff mbox series

Patch

diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index 2bf44bd3cc8a..086b0768fa51 100644
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -287,6 +287,8 @@  struct dualsense_output_report {
 
 #define DS4_INPUT_REPORT_USB			0x01
 #define DS4_INPUT_REPORT_USB_SIZE		64
+#define DS4_INPUT_REPORT_BT_MINIMAL		0x01
+#define DS4_INPUT_REPORT_BT_MINIMAL_SIZE	10
 #define DS4_INPUT_REPORT_BT			0x11
 #define DS4_INPUT_REPORT_BT_SIZE		78
 #define DS4_OUTPUT_REPORT_USB			0x05
@@ -2198,6 +2200,7 @@  static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
 	int battery_status, i, j;
 	uint16_t sensor_timestamp;
 	unsigned long flags;
+	bool is_minimal = false;
 
 	/*
 	 * DualShock4 in USB uses the full HID report for reportID 1, but
@@ -2225,6 +2228,18 @@  static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
 		ds4_report = &bt->common;
 		num_touch_reports = bt->num_touch_reports;
 		touch_reports = bt->touch_reports;
+	} else if (hdev->bus == BUS_BLUETOOTH &&
+		   report->id == DS4_INPUT_REPORT_BT_MINIMAL &&
+			 size == DS4_INPUT_REPORT_BT_MINIMAL_SIZE) {
+		/* Some third-party pads never switch to the full 0x11 report.
+		 * The short 0x01 report is 10 bytes long:
+		 *   u8 report_id == 0x01
+		 *   u8 first_bytes_of_full_report[9]
+		 * So let's reuse the full report parser, and stop it after
+		 * parsing the buttons.
+		 */
+		ds4_report = (struct dualshock4_input_report_common *)&data[1];
+		is_minimal = true;
 	} else {
 		hid_err(hdev, "Unhandled reportID=%d\n", report->id);
 		return -1;
@@ -2258,6 +2273,9 @@  static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
 	input_report_key(ds4->gamepad, BTN_MODE,   ds4_report->buttons[2] & DS_BUTTONS2_PS_HOME);
 	input_sync(ds4->gamepad);
 
+	if (is_minimal)
+		goto finish_minimal;
+
 	/* Parse and calibrate gyroscope data. */
 	for (i = 0; i < ARRAY_SIZE(ds4_report->gyro); i++) {
 		int raw_data = (short)le16_to_cpu(ds4_report->gyro[i]);
@@ -2365,6 +2383,7 @@  static int dualshock4_parse_report(struct ps_device *ps_dev, struct hid_report *
 	ps_dev->battery_status = battery_status;
 	spin_unlock_irqrestore(&ps_dev->lock, flags);
 
+finish_minimal:
 	return 0;
 }