Hi Kiran,
> Read supported offload usecases and set get_data_path callback if
> controller suppports offload codecs.
>
> Signed-off-by: Kiran K <kiran.k@xxxxxxxxx>
> Reviewed-by: Chethan T N <chethan.tumkur.narayan@xxxxxxxxx>
> Reviewed-by: Srivatsa Ravishankar <ravishankar.srivatsa@xxxxxxxxx>
> ---
> drivers/bluetooth/btintel.c | 36 ++++++++++++++++++++++++++++++++++++
> drivers/bluetooth/btintel.h | 18 ++++++++++++++++++
> drivers/bluetooth/btusb.c | 8 ++++++++
> 3 files changed, 62 insertions(+)
>
> diff --git a/drivers/bluetooth/btintel.c b/drivers/bluetooth/btintel.c
> index e44b6993cf91..95c6a1bef35e 100644
> --- a/drivers/bluetooth/btintel.c
> +++ b/drivers/bluetooth/btintel.c
> @@ -1272,6 +1272,42 @@ int btintel_set_debug_features(struct hci_dev *hdev,
> }
> EXPORT_SYMBOL_GPL(btintel_set_debug_features);
>
> +int btintel_get_data_path(struct hci_dev *hdev)
> +{
> + return 1;
> +}
> +EXPORT_SYMBOL_GPL(btintel_get_data_path);
> +
> +int btintel_read_offload_usecases(struct hci_dev *hdev,
> + struct intel_offload_usecases *usecases)
> +{
> + struct sk_buff *skb;
> + int err = 0;
> +
> + skb = __hci_cmd_sync(hdev, 0xfc86, 0, NULL, HCI_INIT_TIMEOUT);
> + if (IS_ERR(skb)) {
> + bt_dev_err(hdev, "Reading offload usecases failed (%ld)",
> + PTR_ERR(skb));
> + return PTR_ERR(skb);
> + }
> +
> + if (skb->len < sizeof(*usecases)) {
> + err = -EIO;
> + goto error;
> + }
> +
> + if (skb->data[0]) {
> + err = -bt_to_errno(skb->data[0]);
> + goto error;
> + }
> +
> + memcpy(usecases, skb->data, sizeof(*usecases));
> +error:
> + kfree_skb(skb);
> + return err;
> +}
> +EXPORT_SYMBOL_GPL(btintel_read_offload_usecases);
> +
> MODULE_AUTHOR("Marcel Holtmann <marcel@xxxxxxxxxxxx>");
> MODULE_DESCRIPTION("Bluetooth support for Intel devices ver " VERSION);
> MODULE_VERSION(VERSION);
> diff --git a/drivers/bluetooth/btintel.h b/drivers/bluetooth/btintel.h
> index d184064a5e7c..9bcc489680db 100644
> --- a/drivers/bluetooth/btintel.h
> +++ b/drivers/bluetooth/btintel.h
> @@ -132,6 +132,11 @@ struct intel_debug_features {
> __u8 page1[16];
> } __packed;
>
> +struct intel_offload_usecases {
> + __u8 status;
> + __u8 preset[8];
> +} __packed;
> +
> #define INTEL_HW_PLATFORM(cnvx_bt) ((u8)(((cnvx_bt) & 0x0000ff00) >> 8))
> #define INTEL_HW_VARIANT(cnvx_bt) ((u8)(((cnvx_bt) & 0x003f0000) >> 16))
> #define INTEL_CNVX_TOP_TYPE(cnvx_top) ((cnvx_top) & 0x00000fff)
> @@ -175,6 +180,9 @@ int btintel_read_debug_features(struct hci_dev *hdev,
> struct intel_debug_features *features);
> int btintel_set_debug_features(struct hci_dev *hdev,
> const struct intel_debug_features *features);
> +int btintel_read_offload_usecases(struct hci_dev *hdev,
> + struct intel_offload_usecases *usecases);
> +int btintel_get_data_path(struct hci_dev *hdev);
> #else
>
> static inline int btintel_check_bdaddr(struct hci_dev *hdev)
> @@ -307,4 +315,14 @@ static inline int btintel_set_debug_features(struct hci_dev *hdev,
> return -EOPNOTSUPP;
> }
>
> +static int btintel_read_offload_usecases(struct hci_dev *hdev,
> + struct intel_offload_usecases *usecases)
> +{
> + return -EOPNOTSUPP;
> +}
> +
> +static int btintel_get_data_path(struct hci_dev *hdev)
> +{
> + return -EOPNOTSUPP;
> +}
> #endif
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index a9855a2dd561..1e51beec5776 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -2952,6 +2952,7 @@ static int btusb_setup_intel_newgen(struct hci_dev *hdev)
> int err;
> struct intel_debug_features features;
> struct intel_version_tlv version;
> + struct intel_offload_usecases usecases;
>
> bt_dev_dbg(hdev, "");
>
> @@ -3008,6 +3009,13 @@ static int btusb_setup_intel_newgen(struct hci_dev *hdev)
> /* Set DDC mask for available debug features */
> btintel_set_debug_features(hdev, &features);
>
> + err = btintel_read_offload_usecases(hdev, &usecases);
> + if (!err) {
> + /* set get_data_path callback if offload is supported */
> + if (usecases.preset[0] & 0x03)
> + hdev->get_data_path = btintel_get_data_path;
> + }
> +
I really wonder if this exporting everything single detail to be just used by btusb is really a good idea. Would it be just enough to have a btintel_configure_offload(hdev); helper that does everything and be done with it. There is already too much Intel specifics bleeding into btusb.c and I think we need to correct that going forward.
Regards
Marcel
