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So the maximum receive channel timeout value might also varies in the various designs. So introduce property mbox-rx-timeout-ms to let each platform could set its own timeout value in device tree. Signed-off-by: Peng Fan --- Documentation/devicetree/bindings/firmware/arm,scmi.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Doc= umentation/devicetree/bindings/firmware/arm,scmi.yaml index 4d823f3b1f0e..d6cc2bf4c819 100644 --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml @@ -121,6 +121,12 @@ properties: atomic mode of operation, even if requested. default: 0 =20 + max-rx-timeout-ms: + description: + An optional time value, expressed in milliseconds, representing, on = this + platform, the mailbox maximum timeout value for receive channel. + default: 0 + arm,smc-id: $ref: /schemas/types.yaml#/definitions/uint32 description: --=20 2.37.1 From nobody Mon Feb 9 05:25:09 2026 Received: from EUR04-VI1-obe.outbound.protection.outlook.com (mail-vi1eur04on2049.outbound.protection.outlook.com [40.107.8.49]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1606015625B; 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If the property does not exist, use mailbox 'scmi_desc' fixed value 30ms as before. Signed-off-by: Peng Fan --- drivers/firmware/arm_scmi/driver.c | 19 ++++++++++++++----- drivers/firmware/arm_scmi/raw_mode.c | 11 +++++++---- drivers/firmware/arm_scmi/raw_mode.h | 3 ++- 3 files changed, 23 insertions(+), 10 deletions(-) diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi= /driver.c index 6b6957f4743f..1aa613d4cb43 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -162,6 +162,7 @@ struct scmi_debug_info { * @devreq_mtx: A mutex to serialize device creation for this SCMI instance * @dbg: A pointer to debugfs related data (if any) * @raw: An opaque reference handle used by SCMI Raw mode. + * @max_rx_timeout_ms: the maximum receive channel timeout value */ struct scmi_info { int id; @@ -188,6 +189,7 @@ struct scmi_info { struct mutex devreq_mtx; struct scmi_debug_info *dbg; void *raw; + unsigned int max_rx_timeout_ms; }; =20 #define handle_to_scmi_info(h) container_of(h, struct scmi_info, handle) @@ -1302,11 +1304,11 @@ static int scmi_wait_for_message_response(struct sc= mi_chan_info *cinfo, =20 trace_scmi_xfer_response_wait(xfer->transfer_id, xfer->hdr.id, xfer->hdr.protocol_id, xfer->hdr.seq, - info->desc->max_rx_timeout_ms, + info->max_rx_timeout_ms, xfer->hdr.poll_completion); =20 return scmi_wait_for_reply(dev, info->desc, cinfo, xfer, - info->desc->max_rx_timeout_ms); + info->max_rx_timeout_ms); } =20 /** @@ -2614,7 +2616,7 @@ static int scmi_chan_setup(struct scmi_info *info, st= ruct device_node *of_node, if (!cinfo) return -ENOMEM; =20 - cinfo->rx_timeout_ms =3D info->desc->max_rx_timeout_ms; + cinfo->rx_timeout_ms =3D info->max_rx_timeout_ms; =20 /* Create a unique name for this transport device */ snprintf(name, 32, "__scmi_transport_device_%s_%02X", @@ -2888,7 +2890,7 @@ static struct scmi_debug_info *scmi_debugfs_common_se= tup(struct scmi_info *info) debugfs_create_bool("is_atomic", 0400, trans, &dbg->is_atomic); =20 debugfs_create_u32("max_rx_timeout_ms", 0400, trans, - (u32 *)&info->desc->max_rx_timeout_ms); + (u32 *)&info->max_rx_timeout_ms); =20 debugfs_create_u32("max_msg_size", 0400, trans, (u32 *)&info->desc->max_msg_size); @@ -2940,7 +2942,8 @@ static int scmi_debugfs_raw_mode_setup(struct scmi_in= fo *info) =20 info->raw =3D scmi_raw_mode_init(&info->handle, info->dbg->top_dentry, info->id, channels, num_chans, - info->desc, info->tx_minfo.max_msg); + info->desc, info->tx_minfo.max_msg, + info->max_rx_timeout_ms); if (IS_ERR(info->raw)) { dev_err(info->dev, "Failed to initialize SCMI RAW Mode !\n"); ret =3D PTR_ERR(info->raw); @@ -2953,6 +2956,7 @@ static int scmi_debugfs_raw_mode_setup(struct scmi_in= fo *info) static int scmi_probe(struct platform_device *pdev) { int ret; + u32 timeout; char *err_str =3D "probe failure\n"; struct scmi_handle *handle; const struct scmi_desc *desc; @@ -3002,6 +3006,11 @@ static int scmi_probe(struct platform_device *pdev) info->atomic_threshold); handle->is_transport_atomic =3D scmi_is_transport_atomic; =20 + if (!of_property_read_u32(np, "max-rx-timeout-ms", &timeout)) + info->max_rx_timeout_ms =3D timeout; + else + info->max_rx_timeout_ms =3D info->desc->max_rx_timeout_ms; + if (desc->ops->link_supplier) { ret =3D desc->ops->link_supplier(dev); if (ret) { diff --git a/drivers/firmware/arm_scmi/raw_mode.c b/drivers/firmware/arm_sc= mi/raw_mode.c index 130d13e9cd6b..d4f37ee664a2 100644 --- a/drivers/firmware/arm_scmi/raw_mode.c +++ b/drivers/firmware/arm_scmi/raw_mode.c @@ -379,7 +379,7 @@ static void scmi_xfer_raw_waiter_enqueue(struct scmi_ra= w_mode_info *raw, trace_scmi_xfer_response_wait(rw->xfer->transfer_id, rw->xfer->hdr.id, rw->xfer->hdr.protocol_id, rw->xfer->hdr.seq, - raw->desc->max_rx_timeout_ms, + raw->max_rx_timeout_ms, rw->xfer->hdr.poll_completion); =20 mutex_lock(&raw->active_mtx); @@ -437,7 +437,7 @@ static void scmi_xfer_raw_worker(struct work_struct *wo= rk) =20 raw =3D container_of(work, struct scmi_raw_mode_info, waiters_work); dev =3D raw->handle->dev; - max_tmo =3D msecs_to_jiffies(raw->desc->max_rx_timeout_ms); + max_tmo =3D msecs_to_jiffies(raw->max_rx_timeout_ms); =20 do { int ret =3D 0; @@ -574,7 +574,7 @@ static int scmi_xfer_raw_get_init(struct scmi_raw_mode_= info *raw, void *buf, dev_dbg(dev, "...retrying[%d] inflight registration\n", retry); - msleep(raw->desc->max_rx_timeout_ms / + msleep(raw->max_rx_timeout_ms / SCMI_XFER_RAW_MAX_RETRIES); } } while (ret && --retry); @@ -1162,6 +1162,7 @@ static int scmi_raw_mode_setup(struct scmi_raw_mode_i= nfo *raw, * @num_chans: The number of entries in @channels * @desc: Reference to the transport operations * @tx_max_msg: Max number of in-flight messages allowed by the transport + * @max_rx_timeout_ms: Max receive channel timeout value * * This function prepare the SCMI Raw stack and creates the debugfs API. * @@ -1170,7 +1171,8 @@ static int scmi_raw_mode_setup(struct scmi_raw_mode_i= nfo *raw, void *scmi_raw_mode_init(const struct scmi_handle *handle, struct dentry *top_dentry, int instance_id, u8 *channels, int num_chans, - const struct scmi_desc *desc, int tx_max_msg) + const struct scmi_desc *desc, int tx_max_msg, + u32 max_rx_timeout_ms) { int ret; struct scmi_raw_mode_info *raw; @@ -1188,6 +1190,7 @@ void *scmi_raw_mode_init(const struct scmi_handle *ha= ndle, raw->desc =3D desc; raw->tx_max_msg =3D tx_max_msg; raw->id =3D instance_id; + raw->max_rx_timeout_ms =3D max_rx_timeout_ms; =20 ret =3D scmi_raw_mode_setup(raw, channels, num_chans); if (ret) { diff --git a/drivers/firmware/arm_scmi/raw_mode.h b/drivers/firmware/arm_sc= mi/raw_mode.h index 8af756a83fd1..25d4a46261e7 100644 --- a/drivers/firmware/arm_scmi/raw_mode.h +++ b/drivers/firmware/arm_scmi/raw_mode.h @@ -20,7 +20,8 @@ enum { void *scmi_raw_mode_init(const struct scmi_handle *handle, struct dentry *top_dentry, int instance_id, u8 *channels, int num_chans, - const struct scmi_desc *desc, int tx_max_msg); + const struct scmi_desc *desc, int tx_max_msg, + u32 max_rx_timeout_ms); void scmi_raw_mode_cleanup(void *raw); =20 void scmi_raw_message_report(void *raw, struct scmi_xfer *xfer, --=20 2.37.1