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Bluetooth: btintel: Iterate only bluetooth device ACPI entries 

Current flow interates over entire ACPI table entries looking for
Bluetooth Per Platform Antenna Gain(PPAG) entry. This patch iterates
over ACPI entries relvant to Bluetooth device only.

Fixes: c585a92b2f ("Bluetooth: btintel: Set Per Platform Antenna Gain(PPAG)")
Signed-off-by: Kiran K <kiran.k@intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Kiran K 2023-02-28 16:31:54 +05:30 committed by Luiz Augusto von Dentz
parent 2f10e40a94
commit 294d749b5d
3 changed files with 27 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
drivers/bluetooth/btintel.c
View File

@ -26,7 +26,14 @@
#define ECDSA_HEADER_LEN 320
#define BTINTEL_PPAG_NAME "PPAG"
#define BTINTEL_PPAG_PREFIX "\\_SB_.PCI0.XHCI.RHUB"
/* structure to store the PPAG data read from ACPI table */
struct btintel_ppag {
u32 domain;
u32 mode;
acpi_status status;
struct hci_dev *hdev;
};
#define CMD_WRITE_BOOT_PARAMS 0xfc0e
struct cmd_write_boot_params {
@ -1295,17 +1302,16 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
status = acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);
if (ACPI_FAILURE(status)) {
bt_dev_warn(hdev, "ACPI Failure: %s", acpi_format_exception(status));
bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
return status;
}
if (strncmp(BTINTEL_PPAG_PREFIX, string.pointer,
strlen(BTINTEL_PPAG_PREFIX))) {
len = strlen(string.pointer);
if (len < strlen(BTINTEL_PPAG_NAME)) {
kfree(string.pointer);
return AE_OK;
}
len = strlen(string.pointer);
if (strncmp((char *)string.pointer + len - 4, BTINTEL_PPAG_NAME, 4)) {
kfree(string.pointer);
return AE_OK;
@ -1314,7 +1320,8 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
status = acpi_evaluate_object(handle, NULL, NULL, &buffer);
if (ACPI_FAILURE(status)) {
bt_dev_warn(hdev, "ACPI Failure: %s", acpi_format_exception(status));
ppag->status = status;
bt_dev_warn(hdev, "PPAG-BT: ACPI Failure: %s", acpi_format_exception(status));
return status;
}
@ -1323,8 +1330,9 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
if (p->type != ACPI_TYPE_PACKAGE || p->package.count != 2) {
kfree(buffer.pointer);
bt_dev_warn(hdev, "Invalid object type: %d or package count: %d",
bt_dev_warn(hdev, "PPAG-BT: Invalid object type: %d or package count: %d",
p->type, p->package.count);
ppag->status = AE_ERROR;
return AE_ERROR;
}
@ -1335,6 +1343,7 @@ static acpi_status btintel_ppag_callback(acpi_handle handle, u32 lvl, void *data
ppag->domain = (u32)p->package.elements[0].integer.value;
ppag->mode = (u32)p->package.elements[1].integer.value;
ppag->status = AE_OK;
kfree(buffer.pointer);
return AE_CTRL_TERMINATE;
}
@ -2314,12 +2323,11 @@ error:
static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver)
{
acpi_status status;
struct btintel_ppag ppag;
struct sk_buff *skb;
struct btintel_loc_aware_reg ppag_cmd;
/* PPAG is not supported if CRF is HrP2, Jfp2, JfP1 */
/* PPAG is not supported if CRF is HrP2, Jfp2, JfP1 */
switch (ver->cnvr_top & 0xFFF) {
case 0x504: /* Hrp2 */
case 0x202: /* Jfp2 */
@ -2330,26 +2338,26 @@ static void btintel_set_ppag(struct hci_dev *hdev, struct intel_version_tlv *ver
memset(&ppag, 0, sizeof(ppag));
ppag.hdev = hdev;
status = acpi_walk_namespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, NULL,
btintel_ppag_callback, &ppag, NULL);
ppag.status = AE_NOT_FOUND;
acpi_walk_namespace(ACPI_TYPE_PACKAGE, ACPI_HANDLE(GET_HCIDEV_DEV(hdev)),
1, NULL, btintel_ppag_callback, &ppag, NULL);
if (ACPI_FAILURE(status)) {
/* Do not log warning message if ACPI entry is not found */
if (status == AE_NOT_FOUND)
if (ACPI_FAILURE(ppag.status)) {
if (ppag.status == AE_NOT_FOUND) {
bt_dev_dbg(hdev, "PPAG-BT: ACPI entry not found");
return;
bt_dev_warn(hdev, "PPAG: ACPI Failure: %s", acpi_format_exception(status));
}
return;
}
if (ppag.domain != 0x12) {
bt_dev_warn(hdev, "PPAG-BT Domain disabled");
bt_dev_warn(hdev, "PPAG-BT: domain is not bluetooth");
return;
}
/* PPAG mode, BIT0 = 0 Disabled, BIT0 = 1 Enabled */
if (!(ppag.mode & BIT(0))) {
bt_dev_dbg(hdev, "PPAG disabled");
bt_dev_dbg(hdev, "PPAG-BT: disabled");
return;
}

7
drivers/bluetooth/btintel.h
View File

@ -137,13 +137,6 @@ struct intel_offload_use_cases {
__u8 preset[8];
} __packed;
/* structure to store the PPAG data read from ACPI table */
struct btintel_ppag {
u32 domain;
u32 mode;
struct hci_dev *hdev;
};
struct btintel_loc_aware_reg {
__le32 mcc;
__le32 sel;

1
include/net/bluetooth/hci_core.h
View File

@ -1613,6 +1613,7 @@ void hci_conn_add_sysfs(struct hci_conn *conn);
void hci_conn_del_sysfs(struct hci_conn *conn);
#define SET_HCIDEV_DEV(hdev, pdev) ((hdev)->dev.parent = (pdev))
#define GET_HCIDEV_DEV(hdev) ((hdev)->dev.parent)
/* ----- LMP capabilities ----- */
#define lmp_encrypt_capable(dev) ((dev)->features[0][0] & LMP_ENCRYPT)