Hi Luiz,
Thanks for your comment.
>> +#define BCM_ROMFW_BASELINE_NUM 0xFFFF static const struct
>> +bcm_chip_version_table disable_broken_read_transmit_power_by_chip_ver[] = {
>> + { 0x87, BCM_ROMFW_BASELINE_NUM } /* CYW4373/4373E */
>> +};
>
> Can we have a little less verbose names? e.g. broken_read_tx_power and btbcm_broken_read_tx_power sounds a lot better imo.
We already have a table named "disable_broken_read_transmit_power" as below.
> static const struct dmi_system_id disable_broken_read_transmit_power[] = {
> {
> .matches = {
> DMI_MATCH(DMI_BOARD_VENDOR, "Apple Inc."),
> DMI_MATCH(DMI_PRODUCT_NAME, "MacBookPro16,1"),
> },
> },
So, as my new table is same role of the original table but referring chip version, I think the name is straight forward.
Or, we may shorten name of the original table as well like below. Do you like it?
Original table
static const struct dmi_system_id broken_read_tx_power_dmi[]
New table
static const struc bcm_chip_version_table broken_read_tx_power_chip_ver[]
Best Regards,
Nobuaki Tsunashima
--
---Original Message-----
From: Luiz Augusto von Dentz <luiz.dentz@xxxxxxxxx>
Sent: Friday, July 5, 2024 10:34 AM
To: Tsunashima Nobuaki (SMD C3 JP RM WLS AE) <Nobuaki.Tsunashima@xxxxxxxxxxxx>
Cc: Marcel Holtmann <marcel@xxxxxxxxxxxx>; linux-bluetooth@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
Subject: Re: [PATCH v5] Bluetooth: btbcm: Apply HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER to CYW4373
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Hi Nobuaki,
On Thu, Jul 4, 2024 at 9:16 PM Nobuaki Tsunashima <nobuaki.tsunashima@xxxxxxxxxxxx> wrote:
>
> From: Nobuaki Tsunashima <Nobuaki.Tsunashima@xxxxxxxxxxxx>
>
> CYW4373 ROM FW has an issue that it claims LE_Read_Transmit_Power
> command as supported in a response of Read_Local_Supported_Command
> command but rejects the LE_Read_Transmit_Power command with "Unknown HCI Command"
> status. Because Bluetooth driver of kernel 5.11 added sending the
> LE_Read_Transmit_Power command in initialize phase, hci up fails due
> to the issue.
>
> Especially in USB i/f case, it would be difficult to download patch FW
> that includes its fix unless hci is up.
>
> The driver already contains infrastructure to apply the quirk for the
> issue, but currently it only supports DMI based matching. Add support
> to match by chip id and baseline FW version to detect CYW4373 ROM FW
> build in generic system.
>
> Fixes: 7c395ea521e6 ("Bluetooth: Query LE tx power on startup")
> Signed-off-by: Nobuaki Tsunashima <Nobuaki.Tsunashima@xxxxxxxxxxxx>
> ---
> V4 -> V5: Use skb_pull_data() to access skb->data as safer manner.
> V3 -> V4: Fix a few coding style warnings and refine comments for clarify.
> V2 -> V3: Fix a few coding style warnings and change the subject as more specific.
> V1 -> V2: Fix several coding style warnings.
>
> drivers/bluetooth/btbcm.c | 41
> +++++++++++++++++++++++++++++++++++++--
> drivers/bluetooth/btusb.c | 4 ++++
> 2 files changed, 43 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/bluetooth/btbcm.c b/drivers/bluetooth/btbcm.c
> index 0a5445ac5e1b..dd7262a8dc8e 100644
> --- a/drivers/bluetooth/btbcm.c
> +++ b/drivers/bluetooth/btbcm.c
> @@ -437,16 +437,53 @@ static const struct dmi_system_id disable_broken_read_transmit_power[] = {
> { }
> };
>
> +struct bcm_chip_version_table {
> + u8 chip_id; /* Chip ID */
> + u16 baseline; /* Baseline version of patch FW */
> +};
> +#define BCM_ROMFW_BASELINE_NUM 0xFFFF static const struct
> +bcm_chip_version_table disable_broken_read_transmit_power_by_chip_ver[] = {
> + { 0x87, BCM_ROMFW_BASELINE_NUM } /* CYW4373/4373E */
> +};
Can we have a little less verbose names? e.g. broken_read_tx_power and btbcm_broken_read_tx_power sounds a lot better imo.
> +static bool btbcm_is_disable_broken_read_tx_power_by_chip_ver(u8
> +chip_id, u16 baseline) {
> + int i;
> + size_t table_size = ARRAY_SIZE(disable_broken_read_transmit_power_by_chip_ver);
> + const struct bcm_chip_version_table *entry =
> +
> +&disable_broken_read_transmit_power_by_chip_ver[0];
> +
> + for (i = 0 ; i < table_size ; i++, entry++) {
> + if ((chip_id == entry->chip_id) && (baseline == entry->baseline))
> + return true;
> + }
> +
> + return false;
> +}
> +
> static int btbcm_read_info(struct hci_dev *hdev) {
> struct sk_buff *skb;
> + u8 *chip_id;
> + u16 *baseline;
>
> /* Read Verbose Config Version Info */
> skb = btbcm_read_verbose_config(hdev);
> if (IS_ERR(skb))
> return PTR_ERR(skb);
> -
> - bt_dev_info(hdev, "BCM: chip id %u", skb->data[1]);
> + skb_pull_data(skb, 1);
> + chip_id = skb_pull_data(skb, sizeof(*chip_id));
> + skb_pull_data(skb, 1);
> + baseline = skb_pull_data(skb, sizeof(*baseline));
> +
> + if (chip_id) {
> + bt_dev_info(hdev, "BCM: chip id %u", *chip_id);
> +
> + if (baseline) {
> + /* Check Chip ID and disable broken Read LE Min/Max Tx Power */
> + if (btbcm_is_disable_broken_read_tx_power_by_chip_ver(*chip_id, *baseline))
> + set_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks);
> + }
> + }
> kfree_skb(skb);
>
> return 0;
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index d31edad7a056..52561c8d8828 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -142,6 +142,10 @@ static const struct usb_device_id btusb_table[] = {
> { USB_VENDOR_AND_INTERFACE_INFO(0x04ca, 0xff, 0x01, 0x01),
> .driver_info = BTUSB_BCM_PATCHRAM },
>
> + /* Cypress devices with vendor specific id */
> + { USB_VENDOR_AND_INTERFACE_INFO(0x04b4, 0xff, 0x01, 0x01),
> + .driver_info = BTUSB_BCM_PATCHRAM },
> +
> /* Broadcom devices with vendor specific id */
> { USB_VENDOR_AND_INTERFACE_INFO(0x0a5c, 0xff, 0x01, 0x01),
> .driver_info = BTUSB_BCM_PATCHRAM },
> --
> 2.25.1
>
--
Luiz Augusto von Dentz
