[PATCH 11/13] HID: playstation: add DualSense player LEDs support.

[Roderick Colenbrander <roderick@gaikai.com>]

From: Roderick Colenbrander <roderick.colenbrander@sony.com>

The DualSense features 5 player LEDs below its touchpad, which are
meant as player id indications. This patch exposes the player LEDs
as individual LEDs.

Signed-off-by: Roderick Colenbrander <roderick.colenbrander@sony.com>
---
 drivers/hid/hid-playstation.c | 64 ++++++++++++++++++++++++++++++++++-
 1 file changed, 63 insertions(+), 1 deletion(-)

diff --git a/drivers/hid/hid-playstation.c b/drivers/hid/hid-playstation.c
index ad8eedd3d2bf..384449e3095d 100644
--- a/drivers/hid/hid-playstation.c
+++ b/drivers/hid/hid-playstation.c
@@ -90,6 +90,7 @@ struct ps_led_info {
 #define DS_OUTPUT_VALID_FLAG1_POWER_SAVE_CONTROL_ENABLE BIT(1)
 #define DS_OUTPUT_VALID_FLAG1_LIGHTBAR_CONTROL_ENABLE BIT(2)
 #define DS_OUTPUT_VALID_FLAG1_RELEASE_LEDS BIT(3)
+#define DS_OUTPUT_VALID_FLAG1_PLAYER_INDICATOR_CONTROL_ENABLE BIT(4)
 #define DS_OUTPUT_VALID_FLAG2_LIGHTBAR_SETUP_CONTROL_ENABLE BIT(1)
 #define DS_OUTPUT_POWER_SAVE_CONTROL_MIC_MUTE BIT(4)
 
@@ -134,6 +135,11 @@ struct dualsense {
 	bool last_btn_mic_state;
 	struct led_classdev mute_led;
 
+	/* Player leds */
+	bool update_player_leds;
+	uint8_t player_leds_state;
+	struct led_classdev player_leds[5];
+
 	struct work_struct output_worker;
 	void *output_report_dmabuf;
 	uint8_t output_seq; /* Sequence number for output report. */
@@ -707,6 +713,39 @@ static enum led_brightness dualsense_mute_led_get_brightness(struct led_classdev
 	return ds->mic_muted;
 }
 
+static enum led_brightness dualsense_player_led_get_brightness(struct led_classdev *led)
+{
+	struct hid_device *hdev = to_hid_device(led->dev->parent);
+	struct dualsense *ds = hid_get_drvdata(hdev);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ds->player_leds); i++) {
+		if (&ds->player_leds[i] == led)
+			return !!(ds->player_leds_state & BIT(i));
+	}
+
+	return LED_OFF;
+}
+
+static void dualsense_player_led_set_brightness(struct led_classdev *led, enum led_brightness value)
+{
+	struct hid_device *hdev = to_hid_device(led->dev->parent);
+	struct dualsense *ds = hid_get_drvdata(hdev);
+	uint8_t player_leds_state = 0;
+	unsigned long flags;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ds->player_leds); i++)
+		player_leds_state |= (ds->player_leds[i].brightness << i);
+
+	spin_lock_irqsave(&ds->base.lock, flags);
+	ds->player_leds_state = player_leds_state;
+	ds->update_player_leds = true;
+	spin_unlock_irqrestore(&ds->base.lock, flags);
+
+	schedule_work(&ds->output_worker);
+}
+
 static void dualsense_init_output_report(struct dualsense *ds, struct dualsense_output_report *rp,
 		void *buf)
 {
@@ -797,6 +836,13 @@ static void dualsense_output_worker(struct work_struct *work)
 		ds->update_lightbar = false;
 	}
 
+	if (ds->update_player_leds) {
+		r->valid_flag1 |= DS_OUTPUT_VALID_FLAG1_PLAYER_INDICATOR_CONTROL_ENABLE;
+		r->player_leds = ds->player_leds_state;
+
+		ds->update_player_leds = false;
+	}
+
 	if (ds->update_mic_mute) {
 		if (ds->mic_muted) {
 			common->valid_flag1 |= DS_OUTPUT_VALID_FLAG1_MIC_MUTE_LED_CONTROL_ENABLE;
@@ -1042,10 +1088,18 @@ static struct ps_device *dualsense_create(struct hid_device *hdev)
 {
 	struct dualsense *ds;
 	uint8_t max_output_report_size;
-	int ret;
+	int i, ret;
 
 	struct ps_led_info mute_led_info = { "micmute", dualsense_mute_led_get_brightness, NULL };
 
+	struct ps_led_info player_leds_info[] = {
+		{ "led1", dualsense_player_led_get_brightness, dualsense_player_led_set_brightness },
+		{ "led2", dualsense_player_led_get_brightness, dualsense_player_led_set_brightness },
+		{ "led3", dualsense_player_led_get_brightness, dualsense_player_led_set_brightness },
+		{ "led4", dualsense_player_led_get_brightness, dualsense_player_led_set_brightness },
+		{ "led5", dualsense_player_led_get_brightness, dualsense_player_led_set_brightness }
+	};
+
 	ds = devm_kzalloc(&hdev->dev, sizeof(*ds), GFP_KERNEL);
 	if (!ds)
 		return ERR_PTR(-ENOMEM);
@@ -1126,6 +1180,14 @@ static struct ps_device *dualsense_create(struct hid_device *hdev)
 	if (ret < 0)
 		goto err;
 
+	for (i = 0; i < ARRAY_SIZE(player_leds_info); i++) {
+		struct ps_led_info *led_info = &player_leds_info[i];
+
+		ret = ps_led_register((struct ps_device *)ds, &ds->player_leds[i], led_info);
+		if (ret < 0)
+			goto err;
+	}
+
 	return (struct ps_device *)ds;
 
 err:
-- 
2.26.2