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-rw-r--r--Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst6
-rw-r--r--Documentation/userspace-api/media/cec/cec-ioc-receive.rst15
-rw-r--r--drivers/media/cec/core/cec-adap.c52
-rw-r--r--drivers/media/cec/core/cec-core.c2
-rw-r--r--include/media/cec.h2
-rw-r--r--include/uapi/linux/cec.h3
6 files changed, 64 insertions, 16 deletions
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst
index d5e014ce19b5..1d5248979a6d 100644
--- a/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst
+++ b/Documentation/userspace-api/media/cec/cec-ioc-adap-g-caps.rst
@@ -137,6 +137,12 @@ returns the information to the application. The ioctl never fails.
- 0x00000100
- If this capability is set, then :ref:`CEC_ADAP_G_CONNECTOR_INFO` can
be used.
+ * .. _`CEC-CAP-REPLY-VENDOR-ID`:
+
+ - ``CEC_CAP_REPLY_VENDOR_ID``
+ - 0x00000200
+ - If this capability is set, then
+ :ref:`CEC_MSG_FL_REPLY_VENDOR_ID <cec-msg-flags>` can be used.
Return Value
============
diff --git a/Documentation/userspace-api/media/cec/cec-ioc-receive.rst b/Documentation/userspace-api/media/cec/cec-ioc-receive.rst
index 364938ad34df..3e6c511e054f 100644
--- a/Documentation/userspace-api/media/cec/cec-ioc-receive.rst
+++ b/Documentation/userspace-api/media/cec/cec-ioc-receive.rst
@@ -232,6 +232,21 @@ View On' messages from initiator 0xf ('Unregistered') to destination 0 ('TV').
capability. If that is not set, then the ``EPERM`` error code is
returned.
+ * .. _`CEC-MSG-FL-REPLY-VENDOR-ID`:
+
+ - ``CEC_MSG_FL_REPLY_VENDOR_ID``
+ - 4
+ - This flag is only available if the ``CEC_CAP_REPLY_VENDOR_ID`` capability
+ is set. If this flag is set, then the reply is expected to consist of
+ the ``CEC_MSG_VENDOR_COMMAND_WITH_ID`` opcode followed by the Vendor ID
+ (in bytes 1-4 of the message), followed by the ``struct cec_msg``
+ ``reply`` field.
+
+ Note that this assumes that the byte after the Vendor ID is a
+ vendor-specific opcode.
+
+ This flag makes it easier to wait for replies to vendor commands.
+
.. tabularcolumns:: |p{5.6cm}|p{0.9cm}|p{10.8cm}|
.. _cec-tx-status:
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c
index da09834990b8..c81b1ed7c08a 100644
--- a/drivers/media/cec/core/cec-adap.c
+++ b/drivers/media/cec/core/cec-adap.c
@@ -673,8 +673,9 @@ void cec_transmit_done_ts(struct cec_adapter *adap, u8 status,
/* Retry this message */
data->attempts -= attempts_made;
if (msg->timeout)
- dprintk(2, "retransmit: %*ph (attempts: %d, wait for 0x%02x)\n",
- msg->len, msg->msg, data->attempts, msg->reply);
+ dprintk(2, "retransmit: %*ph (attempts: %d, wait for %*ph)\n",
+ msg->len, msg->msg, data->attempts,
+ data->match_len, data->match_reply);
else
dprintk(2, "retransmit: %*ph (attempts: %d)\n",
msg->len, msg->msg, data->attempts);
@@ -780,6 +781,7 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
{
struct cec_data *data;
bool is_raw = msg_is_raw(msg);
+ bool reply_vendor_id = msg->flags & CEC_MSG_FL_REPLY_VENDOR_ID;
int err;
if (adap->devnode.unregistered)
@@ -794,12 +796,13 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
msg->tx_low_drive_cnt = 0;
msg->tx_error_cnt = 0;
msg->sequence = 0;
+ msg->flags &= CEC_MSG_FL_REPLY_TO_FOLLOWERS | CEC_MSG_FL_RAW |
+ CEC_MSG_FL_REPLY_VENDOR_ID;
- if (msg->reply && msg->timeout == 0) {
+ if ((reply_vendor_id || msg->reply) && msg->timeout == 0) {
/* Make sure the timeout isn't 0. */
msg->timeout = 1000;
}
- msg->flags &= CEC_MSG_FL_REPLY_TO_FOLLOWERS | CEC_MSG_FL_RAW;
if (!msg->timeout)
msg->flags &= ~CEC_MSG_FL_REPLY_TO_FOLLOWERS;
@@ -809,6 +812,11 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
dprintk(1, "%s: invalid length %d\n", __func__, msg->len);
return -EINVAL;
}
+ if (reply_vendor_id &&
+ (msg->len < 6 || msg->msg[1] != CEC_MSG_VENDOR_COMMAND_WITH_ID)) {
+ dprintk(1, "%s: message too short or not <Vendor Command With ID>\n", __func__);
+ return -EINVAL;
+ }
memset(msg->msg + msg->len, 0, sizeof(msg->msg) - msg->len);
@@ -900,8 +908,9 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
__func__);
return -ENONET;
}
- if (msg->reply) {
- dprintk(1, "%s: invalid msg->reply\n", __func__);
+ if (reply_vendor_id || msg->reply) {
+ dprintk(1, "%s: adapter is unconfigured so reply is not supported\n",
+ __func__);
return -EINVAL;
}
}
@@ -923,6 +932,14 @@ int cec_transmit_msg_fh(struct cec_adapter *adap, struct cec_msg *msg,
data->fh = fh;
data->adap = adap;
data->blocking = block;
+ if (reply_vendor_id) {
+ memcpy(data->match_reply, msg->msg + 1, 4);
+ data->match_reply[4] = msg->reply;
+ data->match_len = 5;
+ } else if (msg->timeout) {
+ data->match_reply[0] = msg->reply;
+ data->match_len = 1;
+ }
init_completion(&data->c);
INIT_DELAYED_WORK(&data->work, cec_wait_timeout);
@@ -1211,13 +1228,15 @@ void cec_received_msg_ts(struct cec_adapter *adap,
if (!abort && dst->msg[1] == CEC_MSG_INITIATE_ARC &&
(cmd == CEC_MSG_REPORT_ARC_INITIATED ||
cmd == CEC_MSG_REPORT_ARC_TERMINATED) &&
- (dst->reply == CEC_MSG_REPORT_ARC_INITIATED ||
- dst->reply == CEC_MSG_REPORT_ARC_TERMINATED))
+ (data->match_reply[0] == CEC_MSG_REPORT_ARC_INITIATED ||
+ data->match_reply[0] == CEC_MSG_REPORT_ARC_TERMINATED)) {
dst->reply = cmd;
+ data->match_reply[0] = cmd;
+ }
/* Does the command match? */
if ((abort && cmd != dst->msg[1]) ||
- (!abort && cmd != dst->reply))
+ (!abort && memcmp(data->match_reply, msg->msg + 1, data->match_len)))
continue;
/* Does the addressing match? */
@@ -2318,18 +2337,21 @@ int cec_adap_status(struct seq_file *file, void *priv)
}
data = adap->transmitting;
if (data)
- seq_printf(file, "transmitting message: %*ph (reply: %02x, timeout: %ums)\n",
- data->msg.len, data->msg.msg, data->msg.reply,
+ seq_printf(file, "transmitting message: %*ph (reply: %*ph, timeout: %ums)\n",
+ data->msg.len, data->msg.msg,
+ data->match_len, data->match_reply,
data->msg.timeout);
seq_printf(file, "pending transmits: %u\n", adap->transmit_queue_sz);
list_for_each_entry(data, &adap->transmit_queue, list) {
- seq_printf(file, "queued tx message: %*ph (reply: %02x, timeout: %ums)\n",
- data->msg.len, data->msg.msg, data->msg.reply,
+ seq_printf(file, "queued tx message: %*ph (reply: %*ph, timeout: %ums)\n",
+ data->msg.len, data->msg.msg,
+ data->match_len, data->match_reply,
data->msg.timeout);
}
list_for_each_entry(data, &adap->wait_queue, list) {
- seq_printf(file, "message waiting for reply: %*ph (reply: %02x, timeout: %ums)\n",
- data->msg.len, data->msg.msg, data->msg.reply,
+ seq_printf(file, "message waiting for reply: %*ph (reply: %*ph, timeout: %ums)\n",
+ data->msg.len, data->msg.msg,
+ data->match_len, data->match_reply,
data->msg.timeout);
}
diff --git a/drivers/media/cec/core/cec-core.c b/drivers/media/cec/core/cec-core.c
index 6f940df0230c..e0756826d629 100644
--- a/drivers/media/cec/core/cec-core.c
+++ b/drivers/media/cec/core/cec-core.c
@@ -273,7 +273,7 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
adap->cec_pin_is_high = true;
adap->log_addrs.cec_version = CEC_OP_CEC_VERSION_2_0;
adap->log_addrs.vendor_id = CEC_VENDOR_ID_NONE;
- adap->capabilities = caps;
+ adap->capabilities = caps | CEC_CAP_REPLY_VENDOR_ID;
if (debug_phys_addr)
adap->capabilities |= CEC_CAP_PHYS_ADDR;
adap->needs_hpd = caps & CEC_CAP_NEEDS_HPD;
diff --git a/include/media/cec.h b/include/media/cec.h
index d131514032f2..07d2ee8a3904 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -66,6 +66,8 @@ struct cec_data {
struct list_head xfer_list;
struct cec_adapter *adap;
struct cec_msg msg;
+ u8 match_len;
+ u8 match_reply[5];
struct cec_fh *fh;
struct delayed_work work;
struct completion c;
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index b8e071abaea5..894fffc66f2c 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -165,6 +165,7 @@ static inline int cec_msg_recv_is_rx_result(const struct cec_msg *msg)
/* cec_msg flags field */
#define CEC_MSG_FL_REPLY_TO_FOLLOWERS (1 << 0)
#define CEC_MSG_FL_RAW (1 << 1)
+#define CEC_MSG_FL_REPLY_VENDOR_ID (1 << 2)
/* cec_msg tx/rx_status field */
#define CEC_TX_STATUS_OK (1 << 0)
@@ -339,6 +340,8 @@ static inline int cec_is_unconfigured(__u16 log_addr_mask)
#define CEC_CAP_MONITOR_PIN (1 << 7)
/* CEC_ADAP_G_CONNECTOR_INFO is available */
#define CEC_CAP_CONNECTOR_INFO (1 << 8)
+/* CEC_MSG_FL_REPLY_VENDOR_ID is available */
+#define CEC_CAP_REPLY_VENDOR_ID (1 << 9)
/**
* struct cec_caps - CEC capabilities structure.
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-17 12:59:27 +0000