ath10k: Use bdf calibration variant for snoc targets

Board Data File (BDF) is loaded upon driver boot-up procedure.
The right board data file is identified using bus and qmi-board-id.

The problem, however, can occur when the (default) board data
file cannot fulfill with the vendor requirements and it is
necessary to use a different board data file.

Also using the chip_id for identifying the board data helps
in dealing with different variants of the board data file based
on the RF card. If the chip_id is not programmed, a default value
of 0xff will be used for parsing the board data file.

Add the support to get the variant field from DTSI and
use this information along with the chip_id to load the vendor
specific BDF.

The device tree requires addition strings to define the variant name

    wifi@a000000 {
            status = "okay";
            qcom,ath10k-calibration-variant = "xyz-v2";
    };

    wifi@a800000 {
            status = "okay";
            qcom,ath10k-calibration-variant = "xyz-v1";
    };

This would create the boarddata identifiers for the board-2.bin search

 *  bus=snoc,qmi-board-id=16,qmi-chip-id=0,variant=xyz-v1
 *  bus=snoc,qmi-board-id=17,qmi-chip-id=0,variant=xyz-v2

Tested-on: WCN3990 hw1.0 SNOC WLAN.HL.3.1-01040-QCAHLSWMTPLZ-1

Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1600157948-2042-1-git-send-email-pillair@codeaurora.org

1 files changed, 13 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c
index 5f4e1219684b..d73ad60b571c 100644
--- a/drivers/net/wireless/ath/ath10k/core.c
+++ b/drivers/net/wireless/ath/ath10k/core.c
@@ -1022,7 +1022,7 @@ static int ath10k_core_check_smbios(struct ath10k *ar)
 	return 0;
 }
 
-static int ath10k_core_check_dt(struct ath10k *ar)
+int ath10k_core_check_dt(struct ath10k *ar)
 {
 	struct device_node *node;
 	const char *variant = NULL;
@@ -1043,6 +1043,7 @@ static int ath10k_core_check_dt(struct ath10k *ar)
 
 	return 0;
 }
+EXPORT_SYMBOL(ath10k_core_check_dt);
 
 static int ath10k_download_fw(struct ath10k *ar)
 {
@@ -1437,10 +1438,17 @@ static int ath10k_core_create_board_name(struct ath10k *ar, char *name,
 	}
 
 	if (ar->id.qmi_ids_valid) {
-		scnprintf(name, name_len,
-			  "bus=%s,qmi-board-id=%x",
-			  ath10k_bus_str(ar->hif.bus),
-			  ar->id.qmi_board_id);
+		if (with_variant && ar->id.bdf_ext[0] != '\0')
+			scnprintf(name, name_len,
+				  "bus=%s,qmi-board-id=%x,qmi-chip-id=%x%s",
+				  ath10k_bus_str(ar->hif.bus),
+				  ar->id.qmi_board_id, ar->id.qmi_chip_id,
+				  variant);
+		else
+			scnprintf(name, name_len,
+				  "bus=%s,qmi-board-id=%x",
+				  ath10k_bus_str(ar->hif.bus),
+				  ar->id.qmi_board_id);
 		goto out;
 	}