[PATCH v4] media: cec: expose HDMI connector to CEC dev mapping

From: Dariusz Marcinkiewicz
Date: Thu May 09 2019 - 03:52:58 EST

This patch proposes to expose explicit mapping between HDMI connectors
and /dev/cecX adapters to userland.

New structure with connector info (card number and connector id in case
of DRM connectors) is added to cec_adapter. That connector info is expected
to be provided when an adapter is created.

CEC notifier is extended so that it can be used to communicate the
connector's info to CEC adapters' creators.

New ioctl, exposing connector info to userland, is added to /dev/cec.

Changes since v3:
- cec_get_connter_conn takes connector_info as argument
Changes since v2:
- cec_s_connector_info removed, the connector info is now passed to
cec_allocate_adapter
- updated commit message
Changes since v1:
Â- removed the unnecessary event,
Â- extended cec_connctor_info to allow for various types of connectors.

Signed-off-by: Dariusz Marcinkiewicz <darekm@xxxxxxxxxx>
---
Documentation/media/kapi/cec-core.rst | 7 +++-
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 +-
drivers/gpu/drm/bridge/adv7511/adv7511_cec.c | 3 +-
drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c | 2 +-
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 1 +
drivers/gpu/drm/drm_dp_cec.c | 22 +++++++-----
drivers/gpu/drm/i2c/tda9950.c | 3 +-
drivers/gpu/drm/i915/intel_dp.c | 4 +--
drivers/gpu/drm/i915/intel_hdmi.c | 6 +++-
drivers/gpu/drm/nouveau/nouveau_connector.c | 3 +-
drivers/gpu/drm/vc4/vc4_hdmi.c | 6 +++-
drivers/media/cec/cec-adap.c | 12 +++++++
drivers/media/cec/cec-api.c | 12 +++++++
drivers/media/cec/cec-core.c | 10 ++++--
drivers/media/cec/cec-notifier.c | 21 ++++++++++--
drivers/media/cec/cec-pin.c | 2 +-
drivers/media/i2c/tc358743.c | 3 +-
.../media/platform/cros-ec-cec/cros-ec-cec.c | 7 ++--
drivers/media/platform/meson/ao-cec.c | 6 +++-
drivers/media/platform/s5p-cec/s5p_cec.c | 6 +++-
drivers/media/platform/seco-cec/seco-cec.c | 8 +++--
drivers/media/platform/sti/cec/stih-cec.c | 6 +++-
drivers/media/platform/stm32/stm32-cec.c | 2 +-
drivers/media/platform/tegra-cec/tegra_cec.c | 5 ++-
drivers/media/platform/vivid/vivid-cec.c | 2 +-
drivers/media/usb/pulse8-cec/pulse8-cec.c | 3 +-
.../media/usb/rainshadow-cec/rainshadow-cec.c | 3 +-
include/drm/drm_dp_helper.h | 14 ++++----
include/media/cec-notifier.h | 34 +++++++++++++++----
include/media/cec.h | 17 ++++++++--
include/uapi/linux/cec.h | 24 +++++++++++++
31 files changed, 201 insertions(+), 55 deletions(-)

diff --git a/Documentation/media/kapi/cec-core.rst b/Documentation/media/kapi/cec-core.rst
index 3ce26b7c2b2b6..3678a0a75104e 100644
--- a/Documentation/media/kapi/cec-core.rst
+++ b/Documentation/media/kapi/cec-core.rst
@@ -37,7 +37,8 @@ calling cec_allocate_adapter() and deleted by calling cec_delete_adapter():

.. c:function::
struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops, void *priv,
- const char *name, u32 caps, u8 available_las);
+ const char *name, u32 caps, u8 available_las,
+ const struct cec_connector_info *connector_info);

.. c:function::
void cec_delete_adapter(struct cec_adapter *adap);
@@ -65,6 +66,10 @@ available_las:
the number of simultaneous logical addresses that this
adapter can handle. Must be 1 <= available_las <= CEC_MAX_LOG_ADDRS.

+connector_info:
+ pointer to a struct describing connector this adapter is associated with,
+ can be NULL.
+
To obtain the priv pointer use this helper function:

.. c:function::
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 6e205ee36ac3b..7f2eb4eb1035b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -394,7 +394,7 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,

drm_dp_aux_register(&aconnector->dm_dp_aux.aux);
drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux,
- aconnector->base.name, dm->adev->dev);
+ &aconnector->base);
aconnector->mst_mgr.cbs = &dm_mst_cbs;
drm_dp_mst_topology_mgr_init(
&aconnector->mst_mgr,
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
index a20a45c0b353f..6400ad9b85502 100644
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_cec.c
@@ -310,7 +310,8 @@ int adv7511_cec_init(struct device *dev, struct adv7511 *adv7511)
goto err_cec_parse_dt;

adv7511->cec_adap = cec_allocate_adapter(&adv7511_cec_adap_ops,
- adv7511, dev_name(dev), CEC_CAP_DEFAULTS, ADV7511_MAX_ADDRS);
+ adv7511, dev_name(dev), CEC_CAP_DEFAULTS, ADV7511_MAX_ADDRS,
+ NULL);
if (IS_ERR(adv7511->cec_adap)) {
ret = PTR_ERR(adv7511->cec_adap);
goto err_cec_alloc;
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
index 6c323510f1288..84fb7b6a0a5e0 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-cec.c
@@ -261,7 +261,7 @@ static int dw_hdmi_cec_probe(struct platform_device *pdev)
cec->adap = cec_allocate_adapter(&dw_hdmi_cec_ops, cec, "dw_hdmi",
CEC_CAP_LOG_ADDRS | CEC_CAP_TRANSMIT |
CEC_CAP_RC | CEC_CAP_PASSTHROUGH,
- CEC_MAX_LOG_ADDRS);
+ CEC_MAX_LOG_ADDRS, NULL);
if (IS_ERR(cec->adap))
return PTR_ERR(cec->adap);

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index db761329a1e3e..0fa04be9e6fb5 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2431,6 +2431,7 @@ static struct dw_hdmi *
__dw_hdmi_probe(struct platform_device *pdev,
const struct dw_hdmi_plat_data *plat_data)
{
+ struct cec_connector_info connector_info;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct platform_device_info pdevinfo;
diff --git a/drivers/gpu/drm/drm_dp_cec.c b/drivers/gpu/drm/drm_dp_cec.c
index b15cee85b702b..84c0d4cd76fad 100644
--- a/drivers/gpu/drm/drm_dp_cec.c
+++ b/drivers/gpu/drm/drm_dp_cec.c
@@ -8,7 +8,9 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <drm/drm_connector.h>
#include <drm/drm_dp_helper.h>
+#include <drm/drmP.h>
#include <media/cec.h>

/*
@@ -295,7 +297,9 @@ static void drm_dp_cec_unregister_work(struct work_struct *work)
*/
void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid)
{
+ struct drm_connector *connector = aux->cec.connector;
u32 cec_caps = CEC_CAP_DEFAULTS | CEC_CAP_NEEDS_HPD;
+ struct cec_connector_info connector_info;
unsigned int num_las = 1;
u8 cap;

@@ -342,15 +346,17 @@ void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid)
cec_unregister_adapter(aux->cec.adap);
}

+ cec_get_drm_connector_info(connector, &connector_info);
+
/* Create a new adapter */
aux->cec.adap = cec_allocate_adapter(&drm_dp_cec_adap_ops,
- aux, aux->cec.name, cec_caps,
- num_las);
+ aux, connector->name, cec_caps,
+ num_las, &connector_info);
if (IS_ERR(aux->cec.adap)) {
aux->cec.adap = NULL;
goto unlock;
}
- if (cec_register_adapter(aux->cec.adap, aux->cec.parent)) {
+ if (cec_register_adapter(aux->cec.adap, connector->dev->dev)) {
cec_delete_adapter(aux->cec.adap);
aux->cec.adap = NULL;
} else {
@@ -406,22 +412,20 @@ EXPORT_SYMBOL(drm_dp_cec_unset_edid);
/**
* drm_dp_cec_register_connector() - register a new connector
* @aux: DisplayPort AUX channel
- * @name: name of the CEC device
- * @parent: parent device
+ * @connector: drm connector
*
* A new connector was registered with associated CEC adapter name and
* CEC adapter parent device. After registering the name and parent
* drm_dp_cec_set_edid() is called to check if the connector supports
* CEC and to register a CEC adapter if that is the case.
*/
-void drm_dp_cec_register_connector(struct drm_dp_aux *aux, const char *name,
- struct device *parent)
+void drm_dp_cec_register_connector(struct drm_dp_aux *aux,
+ struct drm_connector *connector)
{
WARN_ON(aux->cec.adap);
if (WARN_ON(!aux->transfer))
return;
- aux->cec.name = name;
- aux->cec.parent = parent;
+ aux->cec.connector = connector;
INIT_DELAYED_WORK(&aux->cec.unregister_work,
drm_dp_cec_unregister_work);
}
diff --git a/drivers/gpu/drm/i2c/tda9950.c b/drivers/gpu/drm/i2c/tda9950.c
index 250b5e02a314a..b944dd9df85e1 100644
--- a/drivers/gpu/drm/i2c/tda9950.c
+++ b/drivers/gpu/drm/i2c/tda9950.c
@@ -424,7 +424,8 @@ static int tda9950_probe(struct i2c_client *client,

priv->adap = cec_allocate_adapter(&tda9950_cec_ops, priv, "tda9950",
CEC_CAP_DEFAULTS,
- CEC_MAX_LOG_ADDRS);
+ CEC_MAX_LOG_ADDRS,
+ NULL);
if (IS_ERR(priv->adap))
return PTR_ERR(priv->adap);

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 72c49070ed14c..dfe446e6d8167 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -5550,7 +5550,6 @@ static int
intel_dp_connector_register(struct drm_connector *connector)
{
struct intel_dp *intel_dp = intel_attached_dp(connector);
- struct drm_device *dev = connector->dev;
int ret;

ret = intel_connector_register(connector);
@@ -5565,8 +5564,7 @@ intel_dp_connector_register(struct drm_connector *connector)
intel_dp->aux.dev = connector->kdev;
ret = drm_dp_aux_register(&intel_dp->aux);
if (!ret)
- drm_dp_cec_register_connector(&intel_dp->aux,
- connector->name, dev->dev);
+ drm_dp_cec_register_connector(&intel_dp->aux, connector);
return ret;
}

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 26767785f14aa..0f298175cf9c5 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -2966,6 +2966,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
struct intel_encoder *intel_encoder = &intel_dig_port->base;
struct drm_device *dev = intel_encoder->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
+ struct cec_connector_info connector_info;
enum port port = intel_encoder->port;

DRM_DEBUG_KMS("Adding HDMI connector on port %c\n",
@@ -3019,8 +3020,11 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
}

+ cec_get_drm_connector_info(connector, &connector_info);
+
intel_hdmi->cec_notifier = cec_notifier_get_conn(dev->dev,
- port_identifier(port));
+ port_identifier(port),
+ &connector_info);
if (!intel_hdmi->cec_notifier)
DRM_DEBUG_KMS("CEC notifier get failed\n");
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 4116ee62adafe..4438824ca88b0 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -1413,8 +1413,7 @@ nouveau_connector_create(struct drm_device *dev,
switch (type) {
case DRM_MODE_CONNECTOR_DisplayPort:
case DRM_MODE_CONNECTOR_eDP:
- drm_dp_cec_register_connector(&nv_connector->aux,
- connector->name, dev->dev);
+ drm_dp_cec_register_connector(&nv_connector->aux, connector);
break;
}

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index 88fd5df7e7dc6..a7c9c776fe7f2 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1304,6 +1304,7 @@ static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = {

static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
{
+ struct cec_connector_info connector_info;
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = drm->dev_private;
@@ -1413,12 +1414,15 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
goto err_destroy_encoder;
}
#ifdef CONFIG_DRM_VC4_HDMI_CEC
+ cec_get_drm_connector_info(hdmi->connector, &connector_info);
+
hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
vc4, "vc4",
CEC_CAP_TRANSMIT |
CEC_CAP_LOG_ADDRS |
CEC_CAP_PASSTHROUGH |
- CEC_CAP_RC, 1);
+ CEC_CAP_RC, 1,
+ &connector_info);
ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
if (ret < 0)
goto err_destroy_conn;
diff --git a/drivers/media/cec/cec-adap.c b/drivers/media/cec/cec-adap.c
index f1261cc2b6fa5..75c5772cd2f5e 100644
--- a/drivers/media/cec/cec-adap.c
+++ b/drivers/media/cec/cec-adap.c
@@ -16,7 +16,10 @@
#include <linux/string.h>
#include <linux/types.h>

+#include <drm/drm_connector.h>
+#include <drm/drm_device.h>
#include <drm/drm_edid.h>
+#include <drm/drm_file.h>

#include "cec-priv.h"

@@ -75,6 +78,15 @@ u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
}
EXPORT_SYMBOL_GPL(cec_get_edid_phys_addr);

+void cec_get_drm_connector_info(const struct drm_connector *connector,
+ struct cec_connector_info *connector_info)
+{
+ connector_info->type = CEC_CONNECTOR_TYPE_DRM;
+ connector_info->drm.card_no = connector->dev->primary->index;
+ connector_info->drm.connector_id = connector->base.id;
+}
+EXPORT_SYMBOL_GPL(cec_get_drm_connector_info);
+
/*
* Queue a new event for this filehandle. If ts == 0, then set it
* to the current time.
diff --git a/drivers/media/cec/cec-api.c b/drivers/media/cec/cec-api.c
index 156a0d76ab2a1..2ed312ad34a39 100644
--- a/drivers/media/cec/cec-api.c
+++ b/drivers/media/cec/cec-api.c
@@ -187,6 +187,15 @@ 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)
+{
+ if (copy_to_user(parg, &adap->connector_info,
+ sizeof(adap->connector_info)))
+ return -EFAULT;
+ return 0;
+}
+
static long cec_transmit(struct cec_adapter *adap, struct cec_fh *fh,
bool block, struct cec_msg __user *parg)
{
@@ -514,6 +523,9 @@ 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);

diff --git a/drivers/media/cec/cec-core.c b/drivers/media/cec/cec-core.c
index f5d1578e256a7..62039b0a7d7ec 100644
--- a/drivers/media/cec/cec-core.c
+++ b/drivers/media/cec/cec-core.c
@@ -250,8 +250,9 @@ static const struct file_operations cec_error_inj_fops = {
#endif

struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
- void *priv, const char *name, u32 caps,
- u8 available_las)
+ void *priv, const char *name, u32 caps,
+ u8 available_las,
+ const struct cec_connector_info *connector_info)
{
struct cec_adapter *adap;
int res;
@@ -288,6 +289,11 @@ struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
INIT_LIST_HEAD(&adap->wait_queue);
init_waitqueue_head(&adap->kthread_waitq);

+ if (connector_info)
+ adap->connector_info = *connector_info;
+ else
+ adap->connector_info.type = CEC_CONNECTOR_TYPE_NO_CONNECTOR;
+
/* adap->devnode initialization */
INIT_LIST_HEAD(&adap->devnode.fhs);
mutex_init(&adap->devnode.lock);
diff --git a/drivers/media/cec/cec-notifier.c b/drivers/media/cec/cec-notifier.c
index dd2078b27a419..c1ad999f1de47 100644
--- a/drivers/media/cec/cec-notifier.c
+++ b/drivers/media/cec/cec-notifier.c
@@ -26,12 +26,15 @@ struct cec_notifier {
void (*callback)(struct cec_adapter *adap, u16 pa);

u16 phys_addr;
+ struct cec_connector_info connector_info;
};

static LIST_HEAD(cec_notifiers);
static DEFINE_MUTEX(cec_notifiers_lock);

-struct cec_notifier *cec_notifier_get_conn(struct device *dev, const char *conn)
+struct cec_notifier *cec_notifier_get_conn(
+ struct device *dev, const char *conn,
+ const struct cec_connector_info *connector_info)
{
struct cec_notifier *n;

@@ -51,6 +54,12 @@ struct cec_notifier *cec_notifier_get_conn(struct device *dev, const char *conn)
if (conn)
n->conn = kstrdup(conn, GFP_KERNEL);
n->phys_addr = CEC_PHYS_ADDR_INVALID;
+
+ if (connector_info)
+ n->connector_info = *connector_info;
+ else
+ n->connector_info.type = CEC_CONNECTOR_TYPE_NO_CONNECTOR;
+
mutex_init(&n->lock);
kref_init(&n->kref);
list_add_tail(&n->head, &cec_notifiers);
@@ -106,9 +115,17 @@ void cec_notifier_set_phys_addr_from_edid(struct cec_notifier *n,
}
EXPORT_SYMBOL_GPL(cec_notifier_set_phys_addr_from_edid);

+const struct cec_connector_info *cec_notifier_get_connector_info(
+ struct cec_notifier *n)
+{
+ return &n->connector_info;
+}
+EXPORT_SYMBOL_GPL(cec_notifier_get_connector_info);
+
void cec_notifier_register(struct cec_notifier *n,
struct cec_adapter *adap,
- void (*callback)(struct cec_adapter *adap, u16 pa))
+ void (*callback)(struct cec_adapter *adap,
+ u16 pa))
{
kref_get(&n->kref);
mutex_lock(&n->lock);
diff --git a/drivers/media/cec/cec-pin.c b/drivers/media/cec/cec-pin.c
index 8f987bc0dd883..1a04a9be737a9 100644
--- a/drivers/media/cec/cec-pin.c
+++ b/drivers/media/cec/cec-pin.c
@@ -1320,7 +1320,7 @@ struct cec_adapter *cec_pin_allocate_adapter(const struct cec_pin_ops *pin_ops,

adap = cec_allocate_adapter(&cec_pin_adap_ops, priv, name,
caps | CEC_CAP_MONITOR_ALL | CEC_CAP_MONITOR_PIN,
- CEC_MAX_LOG_ADDRS);
+ CEC_MAX_LOG_ADDRS, NULL);

if (IS_ERR(adap)) {
kfree(pin);
diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
index bc2e35e5ce615..14a686c80a9e6 100644
--- a/drivers/media/i2c/tc358743.c
+++ b/drivers/media/i2c/tc358743.c
@@ -2117,7 +2117,8 @@ static int tc358743_probe(struct i2c_client *client,
#ifdef CONFIG_VIDEO_TC358743_CEC
state->cec_adap = cec_allocate_adapter(&tc358743_cec_adap_ops,
state, dev_name(&client->dev),
- CEC_CAP_DEFAULTS | CEC_CAP_MONITOR_ALL, CEC_MAX_LOG_ADDRS);
+ CEC_CAP_DEFAULTS | CEC_CAP_MONITOR_ALL, CEC_MAX_LOG_ADDRS,
+ NULL);
if (IS_ERR(state->cec_adap)) {
err = PTR_ERR(state->cec_adap);
goto err_hdl;
diff --git a/drivers/media/platform/cros-ec-cec/cros-ec-cec.c b/drivers/media/platform/cros-ec-cec/cros-ec-cec.c
index 7bc4d8a9af287..817b1efb8b814 100644
--- a/drivers/media/platform/cros-ec-cec/cros-ec-cec.c
+++ b/drivers/media/platform/cros-ec-cec/cros-ec-cec.c
@@ -235,7 +235,7 @@ static int cros_ec_cec_get_notifier(struct device *dev,
if (!d)
return -EPROBE_DEFER;

- *notify = cec_notifier_get_conn(d, m->conn);
+ *notify = cec_notifier_get_conn(d, m->conn, NULL);
return 0;
}
}
@@ -259,6 +259,7 @@ static int cros_ec_cec_get_notifier(struct device *dev,
static int cros_ec_cec_probe(struct platform_device *pdev)
{
struct cros_ec_dev *ec_dev = dev_get_drvdata(pdev->dev.parent);
+ const struct cec_connector_info *connector_info;
struct cros_ec_device *cros_ec = ec_dev->ec_dev;
struct cros_ec_cec *cros_ec_cec;
int ret;
@@ -281,8 +282,10 @@ static int cros_ec_cec_probe(struct platform_device *pdev)
return ret;
}

+ connector_info = cec_notifier_get_connector_info(cros_ec_cec->notify);
+
cros_ec_cec->adap = cec_allocate_adapter(&cros_ec_cec_ops, cros_ec_cec,
- DRV_NAME, CEC_CAP_DEFAULTS, 1);
+ DRV_NAME, CEC_CAP_DEFAULTS, 1, connector_info);
if (IS_ERR(cros_ec_cec->adap))
return PTR_ERR(cros_ec_cec->adap);

diff --git a/drivers/media/platform/meson/ao-cec.c b/drivers/media/platform/meson/ao-cec.c
index cd4be38ab5acc..3a8097d8be8ce 100644
--- a/drivers/media/platform/meson/ao-cec.c
+++ b/drivers/media/platform/meson/ao-cec.c
@@ -600,6 +600,7 @@ static const struct cec_adap_ops meson_ao_cec_ops = {

static int meson_ao_cec_probe(struct platform_device *pdev)
{
+ const struct cec_connector_info *connector_info;
struct meson_ao_cec_device *ao_cec;
struct platform_device *hdmi_dev;
struct device_node *np;
@@ -626,13 +627,16 @@ static int meson_ao_cec_probe(struct platform_device *pdev)
if (!ao_cec->notify)
return -ENOMEM;

+ connector_info = cec_notifier_get_connector_info(ao_cec->notify);
+
ao_cec->adap = cec_allocate_adapter(&meson_ao_cec_ops, ao_cec,
"meson_ao_cec",
CEC_CAP_LOG_ADDRS |
CEC_CAP_TRANSMIT |
CEC_CAP_RC |
CEC_CAP_PASSTHROUGH,
- 1); /* Use 1 for now */
+ 1, /* Use 1 for now */
+ connector_info);
if (IS_ERR(ao_cec->adap)) {
ret = PTR_ERR(ao_cec->adap);
goto out_probe_notify;
diff --git a/drivers/media/platform/s5p-cec/s5p_cec.c b/drivers/media/platform/s5p-cec/s5p_cec.c
index 8837e2678bdeb..cf5038d7dc5dc 100644
--- a/drivers/media/platform/s5p-cec/s5p_cec.c
+++ b/drivers/media/platform/s5p-cec/s5p_cec.c
@@ -177,6 +177,7 @@ static const struct cec_adap_ops s5p_cec_adap_ops = {

static int s5p_cec_probe(struct platform_device *pdev)
{
+ const struct cec_connector_info *connector_info;
struct device *dev = &pdev->dev;
struct device_node *np;
struct platform_device *hdmi_dev;
@@ -228,8 +229,11 @@ static int s5p_cec_probe(struct platform_device *pdev)
if (cec->notifier == NULL)
return -ENOMEM;

+ connector_info = cec_notifier_get_connector_info(cec->notifier);
+
cec->adap = cec_allocate_adapter(&s5p_cec_adap_ops, cec, CEC_NAME,
- CEC_CAP_DEFAULTS | (needs_hpd ? CEC_CAP_NEEDS_HPD : 0), 1);
+ CEC_CAP_DEFAULTS | (needs_hpd ? CEC_CAP_NEEDS_HPD : 0), 1,
+ connector_info);
ret = PTR_ERR_OR_ZERO(cec->adap);
if (ret)
return ret;
diff --git a/drivers/media/platform/seco-cec/seco-cec.c b/drivers/media/platform/seco-cec/seco-cec.c
index a425a10540c19..fbb9b9a2b4abb 100644
--- a/drivers/media/platform/seco-cec/seco-cec.c
+++ b/drivers/media/platform/seco-cec/seco-cec.c
@@ -535,7 +535,7 @@ static int secocec_cec_get_notifier(struct cec_notifier **notify)
if (!d)
return -EPROBE_DEFER;

- *notify = cec_notifier_get_conn(d, m->conn);
+ *notify = cec_notifier_get_conn(d, m->conn, NULL);

return 0;
}
@@ -570,6 +570,7 @@ static int secocec_acpi_probe(struct secocec_data *sdev)

static int secocec_probe(struct platform_device *pdev)
{
+ struct cec_connector_info *connector_info;
struct secocec_data *secocec;
struct device *dev = &pdev->dev;
int ret;
@@ -635,12 +636,15 @@ static int secocec_probe(struct platform_device *pdev)
goto err;
}

+ connector_info = cec_notifier_get_connector_info(secocec->notifier);
+
/* Allocate CEC adapter */
secocec->cec_adap = cec_allocate_adapter(&secocec_cec_adap_ops,
secocec,
dev_name(dev),
CEC_CAP_DEFAULTS,
- SECOCEC_MAX_ADDRS);
+ SECOCEC_MAX_ADDRS,
+ connector_info);

if (IS_ERR(secocec->cec_adap)) {
ret = PTR_ERR(secocec->cec_adap);
diff --git a/drivers/media/platform/sti/cec/stih-cec.c b/drivers/media/platform/sti/cec/stih-cec.c
index d34099f759901..062720631dcdb 100644
--- a/drivers/media/platform/sti/cec/stih-cec.c
+++ b/drivers/media/platform/sti/cec/stih-cec.c
@@ -298,6 +298,7 @@ static const struct cec_adap_ops sti_cec_adap_ops = {

static int stih_cec_probe(struct platform_device *pdev)
{
+ const struct cec_connector_info *connector_info;
struct device *dev = &pdev->dev;
struct resource *res;
struct stih_cec *cec;
@@ -347,8 +348,11 @@ static int stih_cec_probe(struct platform_device *pdev)
return PTR_ERR(cec->clk);
}

+ connector_info = cec_notifier_get_connector_info(cec->notifier);
+
cec->adap = cec_allocate_adapter(&sti_cec_adap_ops, cec,
- CEC_NAME, CEC_CAP_DEFAULTS, CEC_MAX_LOG_ADDRS);
+ CEC_NAME, CEC_CAP_DEFAULTS, CEC_MAX_LOG_ADDRS,
+ connector_info);
ret = PTR_ERR_OR_ZERO(cec->adap);
if (ret)
return ret;
diff --git a/drivers/media/platform/stm32/stm32-cec.c b/drivers/media/platform/stm32/stm32-cec.c
index 7c496bc1cf381..ee23b9efd45ec 100644
--- a/drivers/media/platform/stm32/stm32-cec.c
+++ b/drivers/media/platform/stm32/stm32-cec.c
@@ -304,7 +304,7 @@ static int stm32_cec_probe(struct platform_device *pdev)
* available for example when a drm driver can provide edid
*/
cec->adap = cec_allocate_adapter(&stm32_cec_adap_ops, cec,
- CEC_NAME, caps, CEC_MAX_LOG_ADDRS);
+ CEC_NAME, caps, CEC_MAX_LOG_ADDRS, NULL);
ret = PTR_ERR_OR_ZERO(cec->adap);
if (ret)
return ret;
diff --git a/drivers/media/platform/tegra-cec/tegra_cec.c b/drivers/media/platform/tegra-cec/tegra_cec.c
index aba488cd0e645..386b26b8f8d46 100644
--- a/drivers/media/platform/tegra-cec/tegra_cec.c
+++ b/drivers/media/platform/tegra-cec/tegra_cec.c
@@ -327,6 +327,7 @@ static const struct cec_adap_ops tegra_cec_ops = {

static int tegra_cec_probe(struct platform_device *pdev)
{
+ const struct cec_connector_info *connector_info;
struct platform_device *hdmi_dev;
struct device_node *np;
struct tegra_cec *cec;
@@ -406,9 +407,11 @@ static int tegra_cec_probe(struct platform_device *pdev)
goto clk_error;
}

+ connector_info = cec_notifier_get_connector_info(cec->notifier);
+
cec->adap = cec_allocate_adapter(&tegra_cec_ops, cec, TEGRA_CEC_NAME,
CEC_CAP_DEFAULTS | CEC_CAP_MONITOR_ALL,
- CEC_MAX_LOG_ADDRS);
+ CEC_MAX_LOG_ADDRS, connector_info);
if (IS_ERR(cec->adap)) {
ret = -ENOMEM;
dev_err(&pdev->dev, "Couldn't create cec adapter\n");
diff --git a/drivers/media/platform/vivid/vivid-cec.c b/drivers/media/platform/vivid/vivid-cec.c
index 4d822dbed9726..ef15c9c58c2a6 100644
--- a/drivers/media/platform/vivid/vivid-cec.c
+++ b/drivers/media/platform/vivid/vivid-cec.c
@@ -283,5 +283,5 @@ struct cec_adapter *vivid_cec_alloc_adap(struct vivid_dev *dev,
is_source ? dev->vid_out_dev.name : dev->vid_cap_dev.name,
idx);
return cec_allocate_adapter(&vivid_cec_adap_ops, dev,
- name, caps, 1);
+ name, caps, 1, NULL);
}
diff --git a/drivers/media/usb/pulse8-cec/pulse8-cec.c b/drivers/media/usb/pulse8-cec/pulse8-cec.c
index b085b14f3f877..b1a741584a648 100644
--- a/drivers/media/usb/pulse8-cec/pulse8-cec.c
+++ b/drivers/media/usb/pulse8-cec/pulse8-cec.c
@@ -656,7 +656,8 @@ static int pulse8_connect(struct serio *serio, struct serio_driver *drv)

pulse8->serio = serio;
pulse8->adap = cec_allocate_adapter(&pulse8_cec_adap_ops, pulse8,
- dev_name(&serio->dev), caps, 1);
+ dev_name(&serio->dev), caps, 1,
+ NULL);
err = PTR_ERR_OR_ZERO(pulse8->adap);
if (err < 0)
goto free_device;
diff --git a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
index d9964da05976b..8681e4d6b3d59 100644
--- a/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
+++ b/drivers/media/usb/rainshadow-cec/rainshadow-cec.c
@@ -323,7 +323,8 @@ static int rain_connect(struct serio *serio, struct serio_driver *drv)

rain->serio = serio;
rain->adap = cec_allocate_adapter(&rain_cec_adap_ops, rain,
- dev_name(&serio->dev), caps, 1);
+ dev_name(&serio->dev), caps, 1,
+ NULL);
err = PTR_ERR_OR_ZERO(rain->adap);
if (err < 0)
goto free_device;
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 97ce790a5b5aa..ded0ff01f2ac7 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1208,6 +1208,7 @@ struct drm_dp_aux_msg {

struct cec_adapter;
struct edid;
+struct drm_connector;

/**
* struct drm_dp_aux_cec - DisplayPort CEC-Tunneling-over-AUX
@@ -1220,8 +1221,7 @@ struct edid;
struct drm_dp_aux_cec {
struct mutex lock;
struct cec_adapter *adap;
- const char *name;
- struct device *parent;
+ struct drm_connector *connector;
struct delayed_work unregister_work;
};

@@ -1418,8 +1418,8 @@ drm_dp_has_quirk(const struct drm_dp_desc *desc, enum drm_dp_quirk quirk)

#ifdef CONFIG_DRM_DP_CEC
void drm_dp_cec_irq(struct drm_dp_aux *aux);
-void drm_dp_cec_register_connector(struct drm_dp_aux *aux, const char *name,
- struct device *parent);
+void drm_dp_cec_register_connector(struct drm_dp_aux *aux,
+ struct drm_connector *connector);
void drm_dp_cec_unregister_connector(struct drm_dp_aux *aux);
void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid);
void drm_dp_cec_unset_edid(struct drm_dp_aux *aux);
@@ -1428,9 +1428,9 @@ static inline void drm_dp_cec_irq(struct drm_dp_aux *aux)
{
}

-static inline void drm_dp_cec_register_connector(struct drm_dp_aux *aux,
- const char *name,
- struct device *parent)
+static inline
+void drm_dp_cec_register_connector(struct drm_dp_aux *aux,
+ struct drm_connector *connector)
{
}

diff --git a/include/media/cec-notifier.h b/include/media/cec-notifier.h
index 814eeef35a5cf..49c6c5b90c81f 100644
--- a/include/media/cec-notifier.h
+++ b/include/media/cec-notifier.h
@@ -24,6 +24,8 @@ struct cec_notifier;
* device and connector tuple.
* @dev: device that sends the events.
* @conn: the connector name from which the event occurs
+ * @connector_info: relevant only if the call is used to create a notifier,
+ * the connector's info to associate with new notifier.
*
* If a notifier for device @dev already exists, then increase the refcount
* and return that notifier.
@@ -33,8 +35,10 @@ struct cec_notifier;
*
* Return NULL if the memory could not be allocated.
*/
-struct cec_notifier *cec_notifier_get_conn(struct device *dev,
- const char *conn);
+struct cec_notifier *cec_notifier_get_conn(
+ struct device *dev,
+ const char *conn,
+ const struct cec_connector_info *connector_info);

/**
* cec_notifier_put - decrease refcount and delete when the refcount reaches 0.
@@ -79,6 +83,14 @@ void cec_notifier_register(struct cec_notifier *n,
*/
void cec_notifier_unregister(struct cec_notifier *n);

+/**
+ * cec_notifier_get_connector_info - get connector info associated with a
+ * notifier.
+ * @n: the CEC notifier
+ */
+const struct cec_connector_info*
+cec_notifier_get_connector_info(struct cec_notifier *n);
+
/**
* cec_register_cec_notifier - register the notifier with the cec adapter.
* @adap: the CEC adapter
@@ -88,8 +100,10 @@ void cec_register_cec_notifier(struct cec_adapter *adap,
struct cec_notifier *notifier);

#else
-static inline struct cec_notifier *cec_notifier_get_conn(struct device *dev,
- const char *conn)
+static inline struct cec_notifier *cec_notifier_get_conn(
+ struct device *dev,
+ const char *conn,
+ const struct cec_connector_info *connector_info)
{
/* A non-NULL pointer is expected on success */
return (struct cec_notifier *)0xdeadfeed;
@@ -108,9 +122,15 @@ static inline void cec_notifier_set_phys_addr_from_edid(struct cec_notifier *n,
{
}

+static inline const struct cec_connector_info*
+ cec_notifier_get_connector_info(struct cec_notifier *n)
+{
+ return NULL;
+}
+
static inline void cec_notifier_register(struct cec_notifier *n,
- struct cec_adapter *adap,
- void (*callback)(struct cec_adapter *adap, u16 pa))
+ struct cec_adapter *adap,
+ void (*callback)(struct cec_adapter *adap, u16 pa))
{
}

@@ -138,7 +158,7 @@ static inline void cec_register_cec_notifier(struct cec_adapter *adap,
*/
static inline struct cec_notifier *cec_notifier_get(struct device *dev)
{
- return cec_notifier_get_conn(dev, NULL);
+ return cec_notifier_get_conn(dev, NULL, NULL);
}

/**
diff --git a/include/media/cec.h b/include/media/cec.h
index 707411ef8ba28..4d5edfd18f662 100644
--- a/include/media/cec.h
+++ b/include/media/cec.h
@@ -200,6 +200,8 @@ struct cec_adapter {
u32 sequence;

char input_phys[32];
+
+ struct cec_connector_info connector_info;
};

static inline void *cec_get_drvdata(const struct cec_adapter *adap)
@@ -233,10 +235,12 @@ static inline bool cec_is_registered(const struct cec_adapter *adap)
((pa) >> 12), ((pa) >> 8) & 0xf, ((pa) >> 4) & 0xf, (pa) & 0xf

struct edid;
+struct drm_connector;

#if IS_REACHABLE(CONFIG_CEC_CORE)
struct cec_adapter *cec_allocate_adapter(const struct cec_adap_ops *ops,
- void *priv, const char *name, u32 caps, u8 available_las);
+ void *priv, const char *name, u32 caps, u8 available_las,
+ const struct cec_connector_info *connector_info);
int cec_register_adapter(struct cec_adapter *adap, struct device *parent);
void cec_unregister_adapter(struct cec_adapter *adap);
void cec_delete_adapter(struct cec_adapter *adap);
@@ -249,7 +253,6 @@ void cec_s_phys_addr_from_edid(struct cec_adapter *adap,
const struct edid *edid);
int cec_transmit_msg(struct cec_adapter *adap, struct cec_msg *msg,
bool block);
-
/* Called by the adapter */
void cec_transmit_done_ts(struct cec_adapter *adap, u8 status,
u8 arb_lost_cnt, u8 nack_cnt, u8 low_drive_cnt,
@@ -331,6 +334,9 @@ void cec_queue_pin_5v_event(struct cec_adapter *adap, bool is_high, ktime_t ts);
u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
unsigned int *offset);

+void cec_get_drm_connector_info(const struct drm_connector *connector,
+ struct cec_connector_info *connector_info);
+
#else

static inline int cec_register_adapter(struct cec_adapter *adap,
@@ -365,6 +371,13 @@ static inline u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
return CEC_PHYS_ADDR_INVALID;
}

+static inline void cec_get_drm_connector_info(
+ const struct drm_connector *connector,
+ struct cec_connector_info *connector_info)
+{
+ connector_info->type = CEC_CONNECTOR_TYPE_NO_CONNECTOR;
+}
+
#endif

/**
diff --git a/include/uapi/linux/cec.h b/include/uapi/linux/cec.h
index 3094af68b6e76..43bc25db38297 100644
--- a/include/uapi/linux/cec.h
+++ b/include/uapi/linux/cec.h
@@ -411,6 +411,27 @@ struct cec_event_lost_msgs {
__u32 lost_msgs;
};

+/**
+ * struct cec_event_connector - tells if and which 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 {
+ __u32 type;
+ union {
+ struct cec_drm_connector_info drm;
+ __u32 raw[16];
+ };
+};
+
/**
* struct cec_event - CEC event structure
* @ts: the timestamp of when the event was sent.
@@ -475,6 +496,9 @@ struct cec_event {
#define CEC_G_MODE _IOR('a', 8, __u32)
#define CEC_S_MODE _IOW('a', 9, __u32)

+/* Gets 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
--
2.18.1