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authorDariusz Marcinkiewicz <darekm@google.com>2019-06-24 16:43:01 +0200
committerHans Verkuil <hverkuil-cisco@xs4all.nl>2019-06-25 16:34:17 +0200
commitc11e3e397576ab56d64d0ee2ffaf8db3d663222d (patch)
tree53fe10130c3c42894ee2c0b0c753963de8c85dc2
parent7dc6bc263e892cf1139002fdd20d76eac273fdbd (diff)
cec: expose the new connector info API
Until now the connector info API was a kernel-internal API only. This moves it to the public API and adds the new ioctl to retrieve this information. Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
-rw-r--r--drivers/media/cec/cec-adap.c2
-rw-r--r--drivers/media/cec/cec-api.c20
-rw-r--r--drivers/media/cec/cec-core.c5
-rw-r--r--include/media/cec.h31
-rw-r--r--include/uapi/linux/cec.h40
5 files changed, 62 insertions, 36 deletions
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index 451c61bde4d4..059c83525024 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -319,6 +319,8 @@ static void cec_post_state_event(struct cec_adapter *adap)
ev.state_change.phys_addr = adap->phys_addr;
ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
+ ev.state_change.have_conn_info =
+ adap->conn_info.type != CEC_CONNECTOR_TYPE_NO_CONNECTOR;
cec_queue_event(adap, &ev);
}
diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c
index 12d676484472..17d1cb2e5f97 100644
--- a/drivers/media/cec/cec-api.c
+++ b/drivers/media/cec/cec-api.c
@@ -187,6 +187,21 @@ static long cec_adap_s_log_addrs(struct cec_adapter *adap, struct cec_fh *fh,
return 0;
}
+static long cec_adap_g_connector_info(struct cec_adapter *adap,
+ struct cec_log_addrs __user *parg)
+{
+ int ret = 0;
+
+ if (!(adap->capabilities & CEC_CAP_CONNECTOR_INFO))
+ return -ENOTTY;
+
+ mutex_lock(&adap->lock);
+ if (copy_to_user(parg, &adap->conn_info, sizeof(adap->conn_info)))
+ ret = -EFAULT;
+ mutex_unlock(&adap->lock);
+ return ret;
+}
+
static long cec_transmit(struct cec_adapter *adap, struct cec_fh *fh,
bool block, struct cec_msg __user *parg)
{
@@ -506,6 +521,9 @@ static long cec_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
case CEC_ADAP_S_LOG_ADDRS:
return cec_adap_s_log_addrs(adap, fh, block, parg);
+ case CEC_ADAP_G_CONNECTOR_INFO:
+ return cec_adap_g_connector_info(adap, parg);
+
case CEC_TRANSMIT:
return cec_transmit(adap, fh, block, parg);
@@ -578,6 +596,8 @@ static int cec_open(struct inode *inode, struct file *filp)
/* Queue up initial state events */
ev.state_change.phys_addr = adap->phys_addr;
ev.state_change.log_addr_mask = adap->log_addrs.log_addr_mask;
+ ev.state_change.have_conn_info =
+ adap->conn_info.type != CEC_CONNECTOR_TYPE_NO_CONNECTOR;
cec_queue_event_fh(fh, &ev, 0);
#ifdef CONFIG_CEC_PIN
if (adap->pin && adap->pin->ops->read_hpd) {
diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c
index 9c610e1e99b8..db7adffcdc76 100644
--- a/drivers/media/cec/cec-core.c
+++ b/drivers/media/cec/cec-core.c
@@ -257,11 +257,6 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
struct cec_adapter *adap;
int res;
- /*
- * Disable this capability until the connector info public API
- * is ready.
- */
- caps &= ~CEC_CAP_CONNECTOR_INFO;
#ifndef CONFIG_MEDIA_CEC_RC
caps &= ~CEC_CAP_RC;
#endif
diff --git a/include/media/cec.h b/include/media/cec.h
index 4d59387bc61b..0a4f69cc9dd4 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -18,9 +18,6 @@
#include <linux/cec-funcs.h>
#include <media/rc-core.h>
-/* CEC_ADAP_G_CONNECTOR_INFO is available */
-#define CEC_CAP_CONNECTOR_INFO (1 << 8)
-
#define CEC_CAP_DEFAULTS (CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT | \
CEC_CAP_PASSTHROUGH | CEC_CAP_RC)
@@ -147,34 +144,6 @@ struct cec_adap_ops {
*/
#define CEC_MAX_MSG_TX_QUEUE_SZ (18 * 1)
-/**
- * struct cec_drm_connector_info - tells which drm connector is
- * associated with the CEC adapter.
- * @card_no: drm card number
- * @connector_id: drm connector ID
- */
-struct cec_drm_connector_info {
- __u32 card_no;
- __u32 connector_id;
-};
-
-#define CEC_CONNECTOR_TYPE_NO_CONNECTOR 0
-#define CEC_CONNECTOR_TYPE_DRM 1
-
-/**
- * struct cec_connector_info - tells if and which connector is
- * associated with the CEC adapter.
- * @type: connector type (if any)
- * @drm: drm connector info
- */
-struct cec_connector_info {
- __u32 type;
- union {
- struct cec_drm_connector_info drm;
- __u32 raw[16];
- };
-};
-
struct cec_adapter {
struct module *owner;
char name[32];
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index 5704fa0292b5..0115c5aa0d36 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -317,6 +317,8 @@ static inline int cec_is_unconfigured(__u16 log_addr_mask)
#define CEC_CAP_NEEDS_HPD (1 << 6)
/* Hardware can monitor CEC pin transitions */
#define CEC_CAP_MONITOR_PIN (1 << 7)
+/* CEC_ADAP_G_CONNECTOR_INFO is available */
+#define CEC_CAP_CONNECTOR_INFO (1 << 8)
/**
* struct cec_caps - CEC capabilities structure.
@@ -375,6 +377,34 @@ struct cec_log_addrs {
/* CDC-Only device: supports only CDC messages */
#define CEC_LOG_ADDRS_FL_CDC_ONLY (1 << 2)
+/**
+ * struct cec_drm_connector_info - tells which drm connector is
+ * associated with the CEC adapter.
+ * @card_no: drm card number
+ * @connector_id: drm connector ID
+ */
+struct cec_drm_connector_info {
+ __u32 card_no;
+ __u32 connector_id;
+};
+
+#define CEC_CONNECTOR_TYPE_NO_CONNECTOR 0
+#define CEC_CONNECTOR_TYPE_DRM 1
+
+/**
+ * struct cec_connector_info - tells if and which connector is
+ * associated with the CEC adapter.
+ * @type: connector type (if any)
+ * @drm: drm connector info
+ */
+struct cec_connector_info {
+ __u32 type;
+ union {
+ struct cec_drm_connector_info drm;
+ __u32 raw[16];
+ };
+};
+
/* Events */
/* Event that occurs when the adapter state changes */
@@ -398,10 +428,17 @@ struct cec_log_addrs {
* struct cec_event_state_change - used when the CEC adapter changes state.
* @phys_addr: the current physical address
* @log_addr_mask: the current logical address mask
+ * @have_conn_info: if non-zero, then HDMI connector information is available.
+ * This field is only valid if CEC_CAP_CONNECTOR_INFO is set. If that
+ * capability is set and @have_conn_info is zero, then that indicates
+ * that the HDMI connector device is not instantiated, either because
+ * the HDMI driver is still configuring the device or because the HDMI
+ * device was unbound.
*/
struct cec_event_state_change {
__u16 phys_addr;
__u16 log_addr_mask;
+ __u16 have_conn_info;
};
/**
@@ -476,6 +513,9 @@ struct cec_event {
#define CEC_G_MODE _IOR('a', 8, __u32)
#define CEC_S_MODE _IOW('a', 9, __u32)
+/* Get the connector info */
+#define CEC_ADAP_G_CONNECTOR_INFO _IOR('a', 10, struct cec_connector_info)
+
/*
* The remainder of this header defines all CEC messages and operands.
* The format matters since it the cec-ctl utility parses it to generate

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