@@ -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::
@@ -24,6 +24,7 @@ Function Reference
cec-ioc-adap-g-caps
cec-ioc-adap-g-log-addrs
cec-ioc-adap-g-phys-addr
+ cec-ioc-adap-g-conn-info
cec-ioc-dqevent
cec-ioc-g-mode
cec-ioc-receive
new file mode 100644
@@ -0,0 +1,109 @@
+.. SPDX-License-Identifier: GPL-2.0
+..
+.. Copyright 2019 Google LLC
+..
+.. This documentation is free software; you can redistribute it and/or
+.. modify it under the terms of the GNU General Public License
+.. version 2 as published by the Free Software Foundation.
+..
+.. This documentation is distributed in the hope that it will be useful,
+.. but WITHOUT ANY WARRANTY; without even the implied warranty of
+.. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+.. GNU General Public License for more details.
+..
+.. _CEC_ADAP_G_CONNECTOR_INFO:
+
+*******************************
+ioctl CEC_ADAP_G_CONNECTOR_INFO
+*******************************
+
+Name
+====
+
+CEC_ADAP_G_CONNECTOR_INFO - Query HDMI connector information
+
+Synopsis
+========
+
+.. c:function:: int ioctl( int fd, CEC_ADAP_G_CONNECTOR_INFO, struct cec_connector_info *argp )
+ :name: CEC_ADAP_G_CONNECTOR_INFO
+
+Arguments
+=========
+
+``fd``
+ File descriptor returned by :c:func:`open() <cec-open>`.
+
+``argp``
+
+
+Description
+===========
+
+Using this ioctl an application can learn which HDMI connector this CEC
+device corresponds to. While calling this ioctl the application should
+provide pointer to a cec_connector_info struct which will be populated
+by the kernel with the info provided by the adapter's driver. Not all
+drivers supply this information.
+
+.. tabularcolumns:: |p{1.0cm}|p{4.4cm}|p{2.5cm}|p{9.6cm}|
+
+.. c:type:: cec_connector_info
+
+.. flat-table:: struct cec_connector_info
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 1 1 1 8
+
+ * - __u32
+ - ``type``
+ - The type of connector this adapter is associated with.
+ * - union
+ - ``(anonymous)``
+ -
+ * -
+ - ``struct cec_drm_connector_info``
+ - drm
+ - :ref:`cec-drm-connector-info`.
+
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. _connector-type:
+
+.. flat-table:: Connector types
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 3 1 8
+
+ * .. _`CEC-CONNECTOR-TYPE-NO-CONNECTOR`:
+
+ - ``CEC_CONNECTOR_TYPE_NO_CONNECTOR``
+ - 0
+ - No connector is associated with the adapter/the information is not provided by the driver.
+ * .. _`CEC-CONNECTOR-TYPE-DRM`:
+
+ - ``CEC_CONNECTOR_TYPE_DRM``
+ - 1
+ - Indicates that a DRM connector is associated with this adapter. Info about the
+ connector can be found in :ref:`cec-drm-connector-info`.
+
+.. tabularcolumns:: |p{4.4cm}|p{2.5cm}|p{10.6cm}|
+
+.. c:type:: cec_drm_connector_info
+
+.. _cec-drm-connector-info:
+
+.. flat-table:: struct cec_drm_connector_info
+ :header-rows: 0
+ :stub-columns: 0
+ :widths: 3 1 8
+
+ * .. _`CEC-DRM-CONNECTOR-TYPE-CARD-NO`:
+
+ - __u32
+ - ``card_no``
+ - DRM card number - the digit from a card's path, e.g. 0 in case of /dev/card0.
+ * .. _`CEC-DRM-CONNECTOR-TYPE-CONNECTOR_ID`:
+
+ - __u32
@@ -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,
@@ -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;
@@ -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);
@@ -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 conn_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_fill_connector_info(&conn_info, connector);
+
/* 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, &conn_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);
}
@@ -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);
@@ -5518,7 +5518,6 @@ 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);
@@ -5533,8 +5532,7 @@ 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;
}
@@ -2968,6 +2968,7 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
struct drm_device *dev = intel_encoder->base.dev;
struct drm_i915_private *dev_priv = to_i915(dev);
enum port port = intel_encoder->port;
+ struct cec_connector_info conn_info;
DRM_DEBUG_KMS("Adding HDMI connector on port %c\n",
port_name(port));
@@ -3020,8 +3021,11 @@ void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port,
I915_WRITE(PEG_BAND_GAP_DATA, (temp & ~0xf) | 0xd);
}
+ cec_fill_connector_info(&conn_info, connector);
+
intel_hdmi->cec_notifier = cec_notifier_get_conn(dev->dev,
- port_identifier(port));
+ port_identifier(port),
+ &conn_info);
if (!intel_hdmi->cec_notifier)
DRM_DEBUG_KMS("CEC notifier get failed\n");
}
@@ -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;
}
@@ -1279,6 +1279,9 @@ static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = {
static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
{
+#ifdef CONFIG_DRM_VC4_HDMI_CEC
+ struct cec_connector_info conn_info;
+#endif
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = drm->dev_private;
@@ -1395,12 +1398,15 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
goto err_destroy_encoder;
}
#ifdef CONFIG_DRM_VC4_HDMI_CEC
+ cec_fill_connector_info(&conn_info, hdmi->connector);
+
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,
+ &conn_info);
ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
if (ret < 0)
goto err_destroy_conn;
@@ -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 +78,16 @@ u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
}
EXPORT_SYMBOL_GPL(cec_get_edid_phys_addr);
+void cec_fill_connector_info(struct cec_connector_info *conn_info,
+ const struct drm_connector *connector)
+{
+ memset(conn_info, 0, sizeof(*conn_info));
+ conn_info->type = CEC_CONNECTOR_TYPE_DRM;
+ conn_info->drm.card_no = connector->dev->primary->index;
+ conn_info->drm.connector_id = connector->base.id;
+}
+EXPORT_SYMBOL_GPL(cec_fill_connector_info);
+
/*
* Queue a new event for this filehandle. If ts == 0, then set it
* to the current time.
@@ -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);
@@ -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 +289,9 @@ 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;
+
/* adap->devnode initialization */
INIT_LIST_HEAD(&adap->devnode.fhs);
mutex_init(&adap->devnode.lock);
@@ -27,12 +27,16 @@ 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;
@@ -52,6 +56,10 @@ 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;
+
mutex_init(&n->lock);
kref_init(&n->kref);
list_add_tail(&n->head, &cec_notifiers);
@@ -107,9 +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_conn_info(
+ struct cec_notifier *n)
+{
+ return &n->connector_info;
+}
+EXPORT_SYMBOL_GPL(cec_notifier_get_conn_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);
@@ -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);
@@ -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;
@@ -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);
put_device(d);
return 0;
}
@@ -261,6 +261,7 @@ 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;
+ const struct cec_connector_info *conn_info;
struct cros_ec_cec *cros_ec_cec;
int ret;
@@ -282,8 +283,10 @@ static int cros_ec_cec_probe(struct platform_device *pdev)
return ret;
}
+ conn_info = cec_notifier_get_conn_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, conn_info);
if (IS_ERR(cros_ec_cec->adap))
return PTR_ERR(cros_ec_cec->adap);
@@ -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 *conn_info;
struct meson_ao_cec_device *ao_cec;
struct device *hdmi_dev;
struct resource *res;
@@ -620,13 +621,16 @@ static int meson_ao_cec_probe(struct platform_device *pdev)
if (!ao_cec->notify)
return -ENOMEM;
+ conn_info = cec_notifier_get_conn_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 */
+ conn_info);
if (IS_ERR(ao_cec->adap)) {
ret = PTR_ERR(ao_cec->adap);
goto out_probe_notify;
@@ -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 *conn_info;
struct device *dev = &pdev->dev;
struct device *hdmi_dev;
struct resource *res;
@@ -222,8 +223,11 @@ static int s5p_cec_probe(struct platform_device *pdev)
if (cec->notifier == NULL)
return -ENOMEM;
+ conn_info = cec_notifier_get_conn_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,
+ conn_info);
ret = PTR_ERR_OR_ZERO(cec->adap);
if (ret)
return ret;
@@ -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);
put_device(d);
return 0;
@@ -571,6 +571,7 @@ static int secocec_acpi_probe(struct secocec_data *sdev)
static int secocec_probe(struct platform_device *pdev)
{
+ const struct cec_connector_info *conn_info;
struct secocec_data *secocec;
struct device *dev = &pdev->dev;
int ret;
@@ -636,12 +637,15 @@ static int secocec_probe(struct platform_device *pdev)
goto err;
}
+ conn_info = cec_notifier_get_conn_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,
+ conn_info);
if (IS_ERR(secocec->cec_adap)) {
ret = PTR_ERR(secocec->cec_adap);
@@ -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 *conn_info;
struct device *dev = &pdev->dev;
struct resource *res;
struct stih_cec *cec;
@@ -340,8 +341,11 @@ static int stih_cec_probe(struct platform_device *pdev)
return PTR_ERR(cec->clk);
}
+ conn_info = cec_notifier_get_conn_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,
+ conn_info);
ret = PTR_ERR_OR_ZERO(cec->adap);
if (ret)
return ret;
@@ -315,7 +315,7 @@ 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;
@@ -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 *conn_info;
struct device *hdmi_dev;
struct tegra_cec *cec;
struct resource *res;
@@ -400,9 +401,11 @@ static int tegra_cec_probe(struct platform_device *pdev)
goto clk_error;
}
+ conn_info = cec_notifier_get_conn_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, conn_info);
if (IS_ERR(cec->adap)) {
ret = -ENOMEM;
dev_err(&pdev->dev, "Couldn't create cec adapter\n");
@@ -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);
}
@@ -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;
@@ -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;
@@ -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)
{
}
@@ -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_conn_info - get connector info associated with a
+ * notifier.
+ * @n: the CEC notifier
+ */
+const struct cec_connector_info *
+cec_notifier_get_conn_info(struct cec_notifier *n);
+
/**
* cec_register_cec_notifier - register the notifier with the cec adapter.
* @adap: the CEC adapter
@@ -99,8 +111,10 @@ void cec_register_cec_notifier(struct cec_adapter *adap,
struct device *cec_notifier_parse_hdmi_phandle(struct device *dev);
#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;
@@ -119,9 +133,15 @@ static inline void cec_notifier_set_phys_addr_from_edid(struct cec_notifier *n,
{
}
+static inline const struct cec_connector_info*
+cec_notifier_get_conn_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))
{
}
@@ -155,7 +175,7 @@ static inline struct device *cec_notifier_parse_hdmi_phandle(struct device *dev)
*/
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);
}
/**
@@ -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);
@@ -331,6 +335,9 @@ 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_fill_connector_info(struct cec_connector_info *connector_info,
+ const struct drm_connector *connector);
+
#else
static inline int cec_register_adapter(struct cec_adapter *adap,
@@ -365,6 +372,13 @@ static inline u16 cec_get_edid_phys_addr(const u8 *edid, unsigned int size,
return CEC_PHYS_ADDR_INVALID;
}
+static inline void
+cec_fill_connector_info(const struct drm_connector *connector,
+ struct cec_connector_info *conn_info)
+{
+ memset(conn_info, 0, sizeof(*conn_info));
+}
+
#endif
/**
@@ -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
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 v5: - make the patch apply against the latest changes in the affected code Changes since v4: - small tweaks + added documentation 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: - removed the unnecessary event, - extended cec_connctor_info to allow for various types of connectors. Signed-off-by: Dariusz Marcinkiewicz <darekm@google.com> --- Documentation/media/kapi/cec-core.rst | 7 +- Documentation/media/uapi/cec/cec-funcs.rst | 1 + .../uapi/cec/cec-ioc-adap-g-conn-info.rst | 109 ++++++++++++++++++ .../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/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 | 8 +- drivers/media/cec/cec-adap.c | 13 +++ drivers/media/cec/cec-api.c | 12 ++ drivers/media/cec/cec-core.c | 8 +- drivers/media/cec/cec-notifier.c | 20 +++- 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 | 16 ++- include/uapi/linux/cec.h | 24 ++++ 32 files changed, 310 insertions(+), 54 deletions(-) create mode 100644 Documentation/media/uapi/cec/cec-ioc-adap-g-conn-info.rst