linux-kernel - [PATCH RFC 1/2] firmware: ti_sci: add BOARDCFG

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20251017-ti-sci-jacinto-s2r-restore-irq-v1-1-34d4339d247a@bootlin.com>
Date: Fri, 17 Oct 2025 16:44:50 +0200
From: "Thomas Richard (TI.com)" <thomas.richard@...tlin.com>
To: Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>, 
 Santosh Shilimkar <ssantosh@...nel.org>
Cc: Gregory CLEMENT <gregory.clement@...tlin.com>, 
 richard.genoud@...tlin.com, Udit Kumar <u-kumar1@...com>, 
 Prasanth Mantena <p-mantena@...com>, Abhash Kumar <a-kumar2@...com>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 "Thomas Richard (TI.com)" <thomas.richard@...tlin.com>
Subject: [PATCH RFC 1/2] firmware: ti_sci: add BOARDCFG_MANAGED mode
 support

In BOARDCFG_MANAGED mode, the low power mode configuration is done
statically for the DM via the boardcfg. Constraints are not supported, and
prepare_sleep() is not needed.

Signed-off-by: Thomas Richard (TI.com) <thomas.richard@...tlin.com>
---
 drivers/firmware/ti_sci.c | 10 +++++++---
 drivers/firmware/ti_sci.h | 14 ++++++++------
 2 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index da134ada64e179b4b307f7e0de5ed0f7371a96f2..f9f1a67e8e66b0a4048fae04ce31be54ca5cba7a 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3693,8 +3693,11 @@ static int ti_sci_prepare_system_suspend(struct ti_sci_info *info)
 			return ti_sci_cmd_prepare_sleep(&info->handle,
 							TISCI_MSG_VALUE_SLEEP_MODE_DM_MANAGED,
 							0, 0, 0);
+		} else if (info->fw_caps & MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED) {
+			/* Nothing to do in the BOARDCFG_MANAGED mode */
+			return 0;
 		} else {
-			/* DM Managed is not supported by the firmware. */
+			/* DM Managed and BoardCfg Managed are not supported by the firmware. */
 			dev_err(info->dev, "Suspend to memory is not supported by the firmware\n");
 			return -EOPNOTSUPP;
 		}
@@ -3932,12 +3935,13 @@ static int ti_sci_probe(struct platform_device *pdev)
 	}
 
 	ti_sci_msg_cmd_query_fw_caps(&info->handle, &info->fw_caps);
-	dev_dbg(dev, "Detected firmware capabilities: %s%s%s%s%s\n",
+	dev_dbg(dev, "Detected firmware capabilities: %s%s%s%s%s%s\n",
 		info->fw_caps & MSG_FLAG_CAPS_GENERIC ? "Generic" : "",
 		info->fw_caps & MSG_FLAG_CAPS_LPM_PARTIAL_IO ? " Partial-IO" : "",
 		info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED ? " DM-Managed" : "",
 		info->fw_caps & MSG_FLAG_CAPS_LPM_ABORT ? " LPM-Abort" : "",
-		info->fw_caps & MSG_FLAG_CAPS_IO_ISOLATION ? " IO-Isolation" : ""
+		info->fw_caps & MSG_FLAG_CAPS_IO_ISOLATION ? " IO-Isolation" : "",
+		info->fw_caps & MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED ? " BoardConfig-Managed" : ""
 	);
 
 	ti_sci_setup_ops(info);
diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
index 7559cde17b6ccfeeb1bc357fce5c5767c3f75c54..ac1cf6971b8678aa1277abb86d9ec672493f4c86 100644
--- a/drivers/firmware/ti_sci.h
+++ b/drivers/firmware/ti_sci.h
@@ -150,6 +150,7 @@ struct ti_sci_msg_req_reboot {
  *		MSG_FLAG_CAPS_LPM_DM_MANAGED: LPM can be managed by DM
  *		MSG_FLAG_CAPS_LPM_ABORT: Abort entry to LPM
  *		MSG_FLAG_CAPS_IO_ISOLATION: IO Isolation support
+ *		MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED: LPM config done statically for the DM via boardcfg
  *
  * Response to a generic message with message type TI_SCI_MSG_QUERY_FW_CAPS
  * providing currently available SOC/firmware capabilities. SoC that don't
@@ -157,12 +158,13 @@ struct ti_sci_msg_req_reboot {
  */
 struct ti_sci_msg_resp_query_fw_caps {
 	struct ti_sci_msg_hdr hdr;
-#define MSG_FLAG_CAPS_GENERIC		TI_SCI_MSG_FLAG(0)
-#define MSG_FLAG_CAPS_LPM_PARTIAL_IO	TI_SCI_MSG_FLAG(4)
-#define MSG_FLAG_CAPS_LPM_DM_MANAGED	TI_SCI_MSG_FLAG(5)
-#define MSG_FLAG_CAPS_LPM_ABORT		TI_SCI_MSG_FLAG(9)
-#define MSG_FLAG_CAPS_IO_ISOLATION	TI_SCI_MSG_FLAG(7)
-#define MSG_MASK_CAPS_LPM		GENMASK_ULL(4, 1)
+#define MSG_FLAG_CAPS_GENERIC			TI_SCI_MSG_FLAG(0)
+#define MSG_FLAG_CAPS_LPM_PARTIAL_IO		TI_SCI_MSG_FLAG(4)
+#define MSG_FLAG_CAPS_LPM_DM_MANAGED		TI_SCI_MSG_FLAG(5)
+#define MSG_FLAG_CAPS_LPM_ABORT			TI_SCI_MSG_FLAG(9)
+#define MSG_FLAG_CAPS_IO_ISOLATION		TI_SCI_MSG_FLAG(7)
+#define MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED	TI_SCI_MSG_FLAG(10)
+#define MSG_MASK_CAPS_LPM			GENMASK_ULL(4, 1)
 	u64 fw_caps;
 } __packed;
 

-- 
2.51.0