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SubjectRe: [PATCH] Bluetooth: btmtksdio: Add in-band wakeup support
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Dear Sean,


Thank you for the patch.

Am 10.06.22 um 02:17 schrieb sean.wang@mediatek.com:
> From: Sean Wang <sean.wang@mediatek.com>
>
> 'ce64b3e94919 ("Bluetooth: mt7921s: Support wake on bluetooth")'
> have added the waken-on-bluetooth via dedicated GPIO.

Maybe:

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

> The patch extends the function to the waken-on-bluetooth via SDIO DAT1 pin
> (inband wakeup) when the SDIO host driver is able to support.

Maybe:

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

How did you test this? In what datasheet is it documented?

> 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>
> ---
> drivers/bluetooth/btmtksdio.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
> index d6700efcfe8c..9ed3af4ba51a 100644
> --- a/drivers/bluetooth/btmtksdio.c
> +++ b/drivers/bluetooth/btmtksdio.c
> @@ -118,6 +118,7 @@ MODULE_DEVICE_TABLE(sdio, btmtksdio_table);
> #define BTMTKSDIO_FUNC_ENABLED 3
> #define BTMTKSDIO_PATCH_ENABLED 4
> #define BTMTKSDIO_HW_RESET_ACTIVE 5
> +#define BTMTKSDIO_INBAND_WAKEUP 6
>
> struct mtkbtsdio_hdr {
> __le16 len;
> @@ -1294,6 +1295,9 @@ static bool btmtksdio_sdio_wakeup(struct hci_dev *hdev)
> .wakeup_delay = cpu_to_le16(0x20),
> };
>
> + if (test_bit(BTMTKSDIO_INBAND_WAKEUP, &bdev->tx_state))
> + return may_wakeup;
> +
> if (may_wakeup && bdev->data->chipid == 0x7921) {
> struct sk_buff *skb;
>
> @@ -1384,6 +1388,10 @@ static int btmtksdio_probe(struct sdio_func *func,
> */
> pm_runtime_put_noidle(bdev->dev);
>
> + /* Mark if the mmc host can support waken by SDIO */

Maybe:

Mark if MMC host supports wake on bluetooth by SDIO

> + if (device_can_wakeup(func->card->host->parent))
> + set_bit(BTMTKSDIO_INBAND_WAKEUP, &bdev->tx_state);
> +
> err = device_init_wakeup(bdev->dev, true);
> if (err)
> bt_dev_err(hdev, "failed to initialize device wakeup");


Kind regards,

Paul

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