mt_set_mode() accepts 2 boolean switches indicating whether the device (if it follows Windows Precision Touchpad specification) should report hardware buttons and/or surface contacts. For a casual reader it is completely not clear, as they look at the call site, which exact mode is being requested. Define report_mode enum and change mt_set_mode() to accept is as an argument instead. This allows to write: mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL); or mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_BUTTONS); which makes intent much more clear. Reviewed-by: Benjamin Tissoires <bentiss@xxxxxxxxxx> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> --- v2: addressed Benjamin's comments, added his reviewed-by. drivers/hid/hid-multitouch.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 99812c0f830b..53fb92453e88 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -31,6 +31,7 @@ * [1] https://gitlab.freedesktop.org/libevdev/hid-tools */ +#include <linux/bits.h> #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> @@ -83,6 +84,13 @@ enum latency_mode { HID_LATENCY_HIGH = 1, }; +enum report_mode { + TOUCHPAD_REPORT_NONE = 0, + TOUCHPAD_REPORT_BUTTONS = BIT(0), + TOUCHPAD_REPORT_CONTACTS = BIT(1), + TOUCHPAD_REPORT_ALL = TOUCHPAD_REPORT_BUTTONS | TOUCHPAD_REPORT_CONTACTS, +}; + #define MT_IO_FLAGS_RUNNING 0 #define MT_IO_FLAGS_ACTIVE_SLOTS 1 #define MT_IO_FLAGS_PENDING_SLOTS 2 @@ -1486,8 +1494,7 @@ static bool mt_need_to_apply_feature(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, enum latency_mode latency, - bool surface_switch, - bool button_switch, + enum report_mode report_mode, bool *inputmode_found) { struct mt_device *td = hid_get_drvdata(hdev); @@ -1542,11 +1549,11 @@ static bool mt_need_to_apply_feature(struct hid_device *hdev, return true; case HID_DG_SURFACESWITCH: - field->value[index] = surface_switch; + field->value[index] = !!(report_mode & TOUCHPAD_REPORT_CONTACTS); return true; case HID_DG_BUTTONSWITCH: - field->value[index] = button_switch; + field->value[index] = !!(report_mode & TOUCHPAD_REPORT_BUTTONS); return true; } @@ -1554,7 +1561,7 @@ static bool mt_need_to_apply_feature(struct hid_device *hdev, } static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency, - bool surface_switch, bool button_switch) + enum report_mode report_mode) { struct hid_report_enum *rep_enum; struct hid_report *rep; @@ -1579,8 +1586,7 @@ static void mt_set_modes(struct hid_device *hdev, enum latency_mode latency, rep->field[i], usage, latency, - surface_switch, - button_switch, + report_mode, &inputmode_found)) update_report = true; } @@ -1820,7 +1826,7 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id) dev_warn(&hdev->dev, "Cannot allocate sysfs group for %s\n", hdev->name); - mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true); + mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL); return 0; } @@ -1832,9 +1838,9 @@ static int mt_suspend(struct hid_device *hdev, pm_message_t state) /* High latency is desirable for power savings during S3/S0ix */ if ((td->mtclass.quirks & MT_QUIRK_DISABLE_WAKEUP) || !hid_hw_may_wakeup(hdev)) - mt_set_modes(hdev, HID_LATENCY_HIGH, false, false); + mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_NONE); else - mt_set_modes(hdev, HID_LATENCY_HIGH, true, true); + mt_set_modes(hdev, HID_LATENCY_HIGH, TOUCHPAD_REPORT_ALL); return 0; } @@ -1842,7 +1848,7 @@ static int mt_suspend(struct hid_device *hdev, pm_message_t state) static int mt_reset_resume(struct hid_device *hdev) { mt_release_contacts(hdev); - mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true); + mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL); return 0; } @@ -1854,7 +1860,7 @@ static int mt_resume(struct hid_device *hdev) hid_hw_idle(hdev, 0, 0, HID_REQ_SET_IDLE); - mt_set_modes(hdev, HID_LATENCY_NORMAL, true, true); + mt_set_modes(hdev, HID_LATENCY_NORMAL, TOUCHPAD_REPORT_ALL); return 0; } -- 2.47.0.163.g1226f6d8fa-goog -- Dmitry
