From: Sean Wang <sean.wang@mediatek.com>
Date: Mon, 27 Jun 2022 07:27:36 +0800
Subject: Bluetooth: btmtksdio: Add in-band wakeup support
Patch-mainline: v6.0-rc1
Git-commit: df332800a914e9fd97b83aa63832979227fd8a8d
References: jsc#PED-1407

Commit ce64b3e94919 ("Bluetooth: mt7921s: Support wake on bluetooth")
adds the wake on bluethooth via a dedicated GPIO.

Extend the wake-on-bluetooth to use the SDIO DAT1 pin (in-band wakeup),
when supported by the SDIO host driver.

Co-developed-by: Yake Yang <yake.yang@mediatek.com>
Signed-off-by: Yake Yang <yake.yang@mediatek.com>
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Lee, Chun-Yi <jlee@suse.com>
---
 drivers/bluetooth/btmtksdio.c |   15 +++++++++++++++
 1 file changed, 15 insertions(+)

--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -1282,6 +1282,13 @@ err:
 	hci_reset_dev(hdev);
 }
 
+static bool btmtksdio_sdio_inband_wakeup(struct hci_dev *hdev)
+{
+	struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
+
+	return device_may_wakeup(bdev->dev);
+}
+
 static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
 {
 	struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
@@ -1349,6 +1356,14 @@ static int btmtksdio_probe(struct sdio_f
 	hdev->shutdown = btmtksdio_shutdown;
 	hdev->send     = btmtksdio_send_frame;
 	hdev->wakeup   = btmtksdio_sdio_wakeup;
+	/*
+	 * If SDIO controller supports wake on Bluetooth, sending a wakeon
+	 * command is not necessary.
+	 */
+	if (device_can_wakeup(func->card->host->parent))
+		hdev->wakeup = btmtksdio_sdio_inband_wakeup;
+	else
+		hdev->wakeup = btmtksdio_sdio_wakeup;
 	hdev->set_bdaddr = btmtk_set_bdaddr;
 
 	SET_HCIDEV_DEV(hdev, &func->dev);