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-rw-r--r--drivers/media/cec/platform/Kconfig2
-rw-r--r--drivers/media/cec/platform/cros-ec/cros-ec-cec.c387
2 files changed, 302 insertions, 87 deletions
diff --git a/drivers/media/cec/platform/Kconfig b/drivers/media/cec/platform/Kconfig
index b672d3142e..ede81fe331 100644
--- a/drivers/media/cec/platform/Kconfig
+++ b/drivers/media/cec/platform/Kconfig
@@ -99,7 +99,7 @@ config CEC_TEGRA
config CEC_SECO
tristate "SECO Boards HDMI CEC driver"
- depends on (X86 || IA64) || COMPILE_TEST
+ depends on X86 || COMPILE_TEST
depends on PCI && DMI
select CEC_CORE
select CEC_NOTIFIER
diff --git a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c
index c17faf0028..42dde3f0db 100644
--- a/drivers/media/cec/platform/cros-ec/cros-ec-cec.c
+++ b/drivers/media/cec/platform/cros-ec/cros-ec-cec.c
@@ -22,50 +22,124 @@
#define DRV_NAME "cros-ec-cec"
/**
- * struct cros_ec_cec - Driver data for EC CEC
+ * struct cros_ec_cec_port - Driver data for a single EC CEC port
*
- * @cros_ec: Pointer to EC device
- * @notifier: Notifier info for responding to EC events
+ * @port_num: port number
* @adap: CEC adapter
* @notify: CEC notifier pointer
* @rx_msg: storage for a received message
+ * @cros_ec_cec: pointer to the parent struct
*/
-struct cros_ec_cec {
- struct cros_ec_device *cros_ec;
- struct notifier_block notifier;
+struct cros_ec_cec_port {
+ int port_num;
struct cec_adapter *adap;
struct cec_notifier *notify;
struct cec_msg rx_msg;
+ struct cros_ec_cec *cros_ec_cec;
+};
+
+/**
+ * struct cros_ec_cec - Driver data for EC CEC
+ *
+ * @cros_ec: Pointer to EC device
+ * @notifier: Notifier info for responding to EC events
+ * @write_cmd_version: Highest supported version of EC_CMD_CEC_WRITE_MSG.
+ * @num_ports: Number of CEC ports
+ * @ports: Array of ports
+ */
+struct cros_ec_cec {
+ struct cros_ec_device *cros_ec;
+ struct notifier_block notifier;
+ int write_cmd_version;
+ int num_ports;
+ struct cros_ec_cec_port *ports[EC_CEC_MAX_PORTS];
};
+static void cros_ec_cec_received_message(struct cros_ec_cec_port *port,
+ uint8_t *msg, uint8_t len)
+{
+ if (len > CEC_MAX_MSG_SIZE)
+ len = CEC_MAX_MSG_SIZE;
+
+ port->rx_msg.len = len;
+ memcpy(port->rx_msg.msg, msg, len);
+
+ cec_received_msg(port->adap, &port->rx_msg);
+}
+
static void handle_cec_message(struct cros_ec_cec *cros_ec_cec)
{
struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec;
uint8_t *cec_message = cros_ec->event_data.data.cec_message;
unsigned int len = cros_ec->event_size;
+ struct cros_ec_cec_port *port;
+ /*
+ * There are two ways of receiving CEC messages:
+ * 1. Old EC firmware which only supports one port sends the data in a
+ * cec_message MKBP event.
+ * 2. New EC firmware which supports multiple ports uses
+ * EC_MKBP_CEC_HAVE_DATA to notify that data is ready and
+ * EC_CMD_CEC_READ_MSG to read it.
+ * Check that the EC only has one CEC port, and then we can assume the
+ * message is from port 0.
+ */
+ if (cros_ec_cec->num_ports != 1) {
+ dev_err(cros_ec->dev,
+ "received cec_message on device with %d ports\n",
+ cros_ec_cec->num_ports);
+ return;
+ }
+ port = cros_ec_cec->ports[0];
- if (len > CEC_MAX_MSG_SIZE)
- len = CEC_MAX_MSG_SIZE;
- cros_ec_cec->rx_msg.len = len;
- memcpy(cros_ec_cec->rx_msg.msg, cec_message, len);
+ cros_ec_cec_received_message(port, cec_message, len);
+}
+
+static void cros_ec_cec_read_message(struct cros_ec_cec_port *port)
+{
+ struct cros_ec_device *cros_ec = port->cros_ec_cec->cros_ec;
+ struct ec_params_cec_read params = {
+ .port = port->port_num,
+ };
+ struct ec_response_cec_read response;
+ int ret;
- cec_received_msg(cros_ec_cec->adap, &cros_ec_cec->rx_msg);
+ ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_READ_MSG, &params,
+ sizeof(params), &response, sizeof(response));
+ if (ret < 0) {
+ dev_err(cros_ec->dev,
+ "error reading CEC message on EC: %d\n", ret);
+ return;
+ }
+
+ cros_ec_cec_received_message(port, response.msg, response.msg_len);
}
static void handle_cec_event(struct cros_ec_cec *cros_ec_cec)
{
struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec;
- uint32_t events = cros_ec->event_data.data.cec_events;
+ uint32_t cec_events = cros_ec->event_data.data.cec_events;
+ uint32_t port_num = EC_MKBP_EVENT_CEC_GET_PORT(cec_events);
+ uint32_t events = EC_MKBP_EVENT_CEC_GET_EVENTS(cec_events);
+ struct cros_ec_cec_port *port;
+
+ if (port_num >= cros_ec_cec->num_ports) {
+ dev_err(cros_ec->dev,
+ "received CEC event for invalid port %d\n", port_num);
+ return;
+ }
+ port = cros_ec_cec->ports[port_num];
if (events & EC_MKBP_CEC_SEND_OK)
- cec_transmit_attempt_done(cros_ec_cec->adap,
- CEC_TX_STATUS_OK);
+ cec_transmit_attempt_done(port->adap, CEC_TX_STATUS_OK);
/* FW takes care of all retries, tell core to avoid more retries */
if (events & EC_MKBP_CEC_SEND_FAILED)
- cec_transmit_attempt_done(cros_ec_cec->adap,
+ cec_transmit_attempt_done(port->adap,
CEC_TX_STATUS_MAX_RETRIES |
CEC_TX_STATUS_NACK);
+
+ if (events & EC_MKBP_CEC_HAVE_DATA)
+ cros_ec_cec_read_message(port);
}
static int cros_ec_cec_event(struct notifier_block *nb,
@@ -93,20 +167,18 @@ static int cros_ec_cec_event(struct notifier_block *nb,
static int cros_ec_cec_set_log_addr(struct cec_adapter *adap, u8 logical_addr)
{
- struct cros_ec_cec *cros_ec_cec = adap->priv;
+ struct cros_ec_cec_port *port = adap->priv;
+ struct cros_ec_cec *cros_ec_cec = port->cros_ec_cec;
struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec;
- struct {
- struct cros_ec_command msg;
- struct ec_params_cec_set data;
- } __packed msg = {};
+ struct ec_params_cec_set params = {
+ .cmd = CEC_CMD_LOGICAL_ADDRESS,
+ .port = port->port_num,
+ .val = logical_addr,
+ };
int ret;
- msg.msg.command = EC_CMD_CEC_SET;
- msg.msg.outsize = sizeof(msg.data);
- msg.data.cmd = CEC_CMD_LOGICAL_ADDRESS;
- msg.data.val = logical_addr;
-
- ret = cros_ec_cmd_xfer_status(cros_ec, &msg.msg);
+ ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_SET, &params, sizeof(params),
+ NULL, 0);
if (ret < 0) {
dev_err(cros_ec->dev,
"error setting CEC logical address on EC: %d\n", ret);
@@ -119,19 +191,26 @@ static int cros_ec_cec_set_log_addr(struct cec_adapter *adap, u8 logical_addr)
static int cros_ec_cec_transmit(struct cec_adapter *adap, u8 attempts,
u32 signal_free_time, struct cec_msg *cec_msg)
{
- struct cros_ec_cec *cros_ec_cec = adap->priv;
+ struct cros_ec_cec_port *port = adap->priv;
+ struct cros_ec_cec *cros_ec_cec = port->cros_ec_cec;
struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec;
- struct {
- struct cros_ec_command msg;
- struct ec_params_cec_write data;
- } __packed msg = {};
+ struct ec_params_cec_write params;
+ struct ec_params_cec_write_v1 params_v1;
int ret;
- msg.msg.command = EC_CMD_CEC_WRITE_MSG;
- msg.msg.outsize = cec_msg->len;
- memcpy(msg.data.msg, cec_msg->msg, cec_msg->len);
+ if (cros_ec_cec->write_cmd_version == 0) {
+ memcpy(params.msg, cec_msg->msg, cec_msg->len);
+ ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_WRITE_MSG, &params,
+ cec_msg->len, NULL, 0);
+ } else {
+ params_v1.port = port->port_num;
+ params_v1.msg_len = cec_msg->len;
+ memcpy(params_v1.msg, cec_msg->msg, cec_msg->len);
+ ret = cros_ec_cmd(cros_ec, cros_ec_cec->write_cmd_version,
+ EC_CMD_CEC_WRITE_MSG, &params_v1,
+ sizeof(params_v1), NULL, 0);
+ }
- ret = cros_ec_cmd_xfer_status(cros_ec, &msg.msg);
if (ret < 0) {
dev_err(cros_ec->dev,
"error writing CEC msg on EC: %d\n", ret);
@@ -143,20 +222,18 @@ static int cros_ec_cec_transmit(struct cec_adapter *adap, u8 attempts,
static int cros_ec_cec_adap_enable(struct cec_adapter *adap, bool enable)
{
- struct cros_ec_cec *cros_ec_cec = adap->priv;
+ struct cros_ec_cec_port *port = adap->priv;
+ struct cros_ec_cec *cros_ec_cec = port->cros_ec_cec;
struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec;
- struct {
- struct cros_ec_command msg;
- struct ec_params_cec_set data;
- } __packed msg = {};
+ struct ec_params_cec_set params = {
+ .cmd = CEC_CMD_ENABLE,
+ .port = port->port_num,
+ .val = enable,
+ };
int ret;
- msg.msg.command = EC_CMD_CEC_SET;
- msg.msg.outsize = sizeof(msg.data);
- msg.data.cmd = CEC_CMD_ENABLE;
- msg.data.val = enable;
-
- ret = cros_ec_cmd_xfer_status(cros_ec, &msg.msg);
+ ret = cros_ec_cmd(cros_ec, 0, EC_CMD_CEC_SET, &params, sizeof(params),
+ NULL, 0);
if (ret < 0) {
dev_err(cros_ec->dev,
"error %sabling CEC on EC: %d\n",
@@ -203,38 +280,54 @@ static SIMPLE_DEV_PM_OPS(cros_ec_cec_pm_ops,
#if IS_ENABLED(CONFIG_PCI) && IS_ENABLED(CONFIG_DMI)
/*
- * The Firmware only handles a single CEC interface tied to a single HDMI
- * connector we specify along with the DRM device name handling the HDMI output
+ * Specify the DRM device name handling the HDMI output and the HDMI connector
+ * corresponding to each CEC port. The order of connectors must match the order
+ * in the EC (first connector is EC port 0, ...), and the number of connectors
+ * must match the number of ports in the EC (which can be queried using the
+ * EC_CMD_CEC_PORT_COUNT host command).
*/
struct cec_dmi_match {
const char *sys_vendor;
const char *product_name;
const char *devname;
- const char *conn;
+ const char *const *conns;
};
+static const char *const port_b_conns[] = { "Port B", NULL };
+static const char *const port_db_conns[] = { "Port D", "Port B", NULL };
+static const char *const port_ba_conns[] = { "Port B", "Port A", NULL };
+static const char *const port_d_conns[] = { "Port D", NULL };
+
static const struct cec_dmi_match cec_dmi_match_table[] = {
/* Google Fizz */
- { "Google", "Fizz", "0000:00:02.0", "Port B" },
+ { "Google", "Fizz", "0000:00:02.0", port_b_conns },
/* Google Brask */
- { "Google", "Brask", "0000:00:02.0", "Port B" },
+ { "Google", "Brask", "0000:00:02.0", port_b_conns },
/* Google Moli */
- { "Google", "Moli", "0000:00:02.0", "Port B" },
+ { "Google", "Moli", "0000:00:02.0", port_b_conns },
/* Google Kinox */
- { "Google", "Kinox", "0000:00:02.0", "Port B" },
+ { "Google", "Kinox", "0000:00:02.0", port_b_conns },
/* Google Kuldax */
- { "Google", "Kuldax", "0000:00:02.0", "Port B" },
+ { "Google", "Kuldax", "0000:00:02.0", port_b_conns },
/* Google Aurash */
- { "Google", "Aurash", "0000:00:02.0", "Port B" },
+ { "Google", "Aurash", "0000:00:02.0", port_b_conns },
/* Google Gladios */
- { "Google", "Gladios", "0000:00:02.0", "Port B" },
+ { "Google", "Gladios", "0000:00:02.0", port_b_conns },
/* Google Lisbon */
- { "Google", "Lisbon", "0000:00:02.0", "Port B" },
+ { "Google", "Lisbon", "0000:00:02.0", port_b_conns },
+ /* Google Dibbi */
+ { "Google", "Dibbi", "0000:00:02.0", port_db_conns },
+ /* Google Constitution */
+ { "Google", "Constitution", "0000:00:02.0", port_ba_conns },
+ /* Google Boxy */
+ { "Google", "Boxy", "0000:00:02.0", port_d_conns },
+ /* Google Taranza */
+ { "Google", "Taranza", "0000:00:02.0", port_db_conns },
};
static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev,
- const char **conn)
+ const char * const **conns)
{
int i;
@@ -251,7 +344,7 @@ static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev,
if (!d)
return ERR_PTR(-EPROBE_DEFER);
put_device(d);
- *conn = m->conn;
+ *conns = m->conns;
return d;
}
}
@@ -265,23 +358,137 @@ static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev,
#else
static struct device *cros_ec_cec_find_hdmi_dev(struct device *dev,
- const char **conn)
+ const char * const **conns)
{
return ERR_PTR(-ENODEV);
}
#endif
+static int cros_ec_cec_get_num_ports(struct cros_ec_cec *cros_ec_cec)
+{
+ struct ec_response_cec_port_count response;
+ int ret;
+
+ ret = cros_ec_cmd(cros_ec_cec->cros_ec, 0, EC_CMD_CEC_PORT_COUNT, NULL,
+ 0, &response, sizeof(response));
+ if (ret < 0) {
+ /*
+ * Old EC firmware only supports one port and does not support
+ * the port count command, so fall back to assuming one port.
+ */
+ cros_ec_cec->num_ports = 1;
+ return 0;
+ }
+
+ if (response.port_count == 0) {
+ dev_err(cros_ec_cec->cros_ec->dev,
+ "EC reports 0 CEC ports\n");
+ return -ENODEV;
+ }
+
+ if (response.port_count > EC_CEC_MAX_PORTS) {
+ dev_err(cros_ec_cec->cros_ec->dev,
+ "EC reports too many ports: %d\n", response.port_count);
+ return -EINVAL;
+ }
+
+ cros_ec_cec->num_ports = response.port_count;
+ return 0;
+}
+
+static int cros_ec_cec_get_write_cmd_version(struct cros_ec_cec *cros_ec_cec)
+{
+ struct cros_ec_device *cros_ec = cros_ec_cec->cros_ec;
+ struct ec_params_get_cmd_versions_v1 params = {
+ .cmd = EC_CMD_CEC_WRITE_MSG,
+ };
+ struct ec_response_get_cmd_versions response;
+ int ret;
+
+ ret = cros_ec_cmd(cros_ec, 1, EC_CMD_GET_CMD_VERSIONS, &params,
+ sizeof(params), &response, sizeof(response));
+ if (ret < 0) {
+ dev_err(cros_ec->dev,
+ "error getting CEC write command version: %d\n", ret);
+ return ret;
+ }
+
+ if (response.version_mask & EC_VER_MASK(1)) {
+ cros_ec_cec->write_cmd_version = 1;
+ } else {
+ if (cros_ec_cec->num_ports != 1) {
+ dev_err(cros_ec->dev,
+ "v0 write command only supports 1 port, %d reported\n",
+ cros_ec_cec->num_ports);
+ return -EINVAL;
+ }
+ cros_ec_cec->write_cmd_version = 0;
+ }
+
+ return 0;
+}
+
+static int cros_ec_cec_init_port(struct device *dev,
+ struct cros_ec_cec *cros_ec_cec,
+ int port_num, struct device *hdmi_dev,
+ const char * const *conns)
+{
+ struct cros_ec_cec_port *port;
+ int ret;
+
+ port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return -ENOMEM;
+
+ port->cros_ec_cec = cros_ec_cec;
+ port->port_num = port_num;
+
+ port->adap = cec_allocate_adapter(&cros_ec_cec_ops, port, DRV_NAME,
+ CEC_CAP_DEFAULTS |
+ CEC_CAP_CONNECTOR_INFO, 1);
+ if (IS_ERR(port->adap))
+ return PTR_ERR(port->adap);
+
+ if (!conns[port_num]) {
+ dev_err(dev, "no conn for port %d\n", port_num);
+ ret = -ENODEV;
+ goto out_probe_adapter;
+ }
+
+ port->notify = cec_notifier_cec_adap_register(hdmi_dev, conns[port_num],
+ port->adap);
+ if (!port->notify) {
+ ret = -ENOMEM;
+ goto out_probe_adapter;
+ }
+
+ ret = cec_register_adapter(port->adap, dev);
+ if (ret < 0)
+ goto out_probe_notify;
+
+ cros_ec_cec->ports[port_num] = port;
+
+ return 0;
+
+out_probe_notify:
+ cec_notifier_cec_adap_unregister(port->notify, port->adap);
+out_probe_adapter:
+ cec_delete_adapter(port->adap);
+ return ret;
+}
+
static int cros_ec_cec_probe(struct platform_device *pdev)
{
struct cros_ec_dev *ec_dev = dev_get_drvdata(pdev->dev.parent);
struct cros_ec_device *cros_ec = ec_dev->ec_dev;
struct cros_ec_cec *cros_ec_cec;
+ struct cros_ec_cec_port *port;
struct device *hdmi_dev;
- const char *conn = NULL;
+ const char * const *conns = NULL;
int ret;
- hdmi_dev = cros_ec_cec_find_hdmi_dev(&pdev->dev, &conn);
+ hdmi_dev = cros_ec_cec_find_hdmi_dev(&pdev->dev, &conns);
if (IS_ERR(hdmi_dev))
return PTR_ERR(hdmi_dev);
@@ -295,18 +502,19 @@ static int cros_ec_cec_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 1);
- cros_ec_cec->adap = cec_allocate_adapter(&cros_ec_cec_ops, cros_ec_cec,
- DRV_NAME,
- CEC_CAP_DEFAULTS |
- CEC_CAP_CONNECTOR_INFO, 1);
- if (IS_ERR(cros_ec_cec->adap))
- return PTR_ERR(cros_ec_cec->adap);
+ ret = cros_ec_cec_get_num_ports(cros_ec_cec);
+ if (ret)
+ return ret;
- cros_ec_cec->notify = cec_notifier_cec_adap_register(hdmi_dev, conn,
- cros_ec_cec->adap);
- if (!cros_ec_cec->notify) {
- ret = -ENOMEM;
- goto out_probe_adapter;
+ ret = cros_ec_cec_get_write_cmd_version(cros_ec_cec);
+ if (ret)
+ return ret;
+
+ for (int i = 0; i < cros_ec_cec->num_ports; i++) {
+ ret = cros_ec_cec_init_port(&pdev->dev, cros_ec_cec, i,
+ hdmi_dev, conns);
+ if (ret)
+ goto unregister_ports;
}
/* Get CEC events from the EC. */
@@ -315,20 +523,24 @@ static int cros_ec_cec_probe(struct platform_device *pdev)
&cros_ec_cec->notifier);
if (ret) {
dev_err(&pdev->dev, "failed to register notifier\n");
- goto out_probe_notify;
+ goto unregister_ports;
}
- ret = cec_register_adapter(cros_ec_cec->adap, &pdev->dev);
- if (ret < 0)
- goto out_probe_notify;
-
return 0;
-out_probe_notify:
- cec_notifier_cec_adap_unregister(cros_ec_cec->notify,
- cros_ec_cec->adap);
-out_probe_adapter:
- cec_delete_adapter(cros_ec_cec->adap);
+unregister_ports:
+ /*
+ * Unregister any adapters which have been registered. We don't add the
+ * port to the array until the adapter has been registered successfully,
+ * so any non-NULL ports must have been registered.
+ */
+ for (int i = 0; i < cros_ec_cec->num_ports; i++) {
+ port = cros_ec_cec->ports[i];
+ if (!port)
+ break;
+ cec_notifier_cec_adap_unregister(port->notify, port->adap);
+ cec_unregister_adapter(port->adap);
+ }
return ret;
}
@@ -336,6 +548,7 @@ static void cros_ec_cec_remove(struct platform_device *pdev)
{
struct cros_ec_cec *cros_ec_cec = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
+ struct cros_ec_cec_port *port;
int ret;
/*
@@ -349,9 +562,11 @@ static void cros_ec_cec_remove(struct platform_device *pdev)
if (ret)
dev_err(dev, "failed to unregister notifier\n");
- cec_notifier_cec_adap_unregister(cros_ec_cec->notify,
- cros_ec_cec->adap);
- cec_unregister_adapter(cros_ec_cec->adap);
+ for (int i = 0; i < cros_ec_cec->num_ports; i++) {
+ port = cros_ec_cec->ports[i];
+ cec_notifier_cec_adap_unregister(port->notify, port->adap);
+ cec_unregister_adapter(port->adap);
+ }
}
static struct platform_driver cros_ec_cec_driver = {