[PATCH 4/5] drm_dp_cec: add plumbing in preparation for MST support
From: Sam McNally
Date: Tue Sep 01 2020 - 02:23:28 EST
From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
[sammc@xxxxxxxxxxxx:
- rebased
- removed polling-related changes
- moved the calls to drm_dp_cec_(un)set_edid() into the next patch
]
Signed-off-by: Sam McNally <sammc@xxxxxxxxxxxx>
---
.../display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 +-
drivers/gpu/drm/drm_dp_cec.c | 22 ++++++++++---------
drivers/gpu/drm/i915/display/intel_dp.c | 2 +-
drivers/gpu/drm/nouveau/nouveau_connector.c | 2 +-
include/drm/drm_dp_helper.h | 6 +++--
5 files changed, 19 insertions(+), 15 deletions(-)
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 461fa4da0a34..6e7075893ec9 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
@@ -419,7 +419,7 @@ void amdgpu_dm_initialize_dp_connector(struct amdgpu_display_manager *dm,
drm_dp_aux_init(&aconnector->dm_dp_aux.aux);
drm_dp_cec_register_connector(&aconnector->dm_dp_aux.aux,
- &aconnector->base);
+ &aconnector->base, false);
if (aconnector->base.connector_type == DRM_MODE_CONNECTOR_eDP)
return;
diff --git a/drivers/gpu/drm/drm_dp_cec.c b/drivers/gpu/drm/drm_dp_cec.c
index 3ab2609f9ec7..04ab7b88055c 100644
--- a/drivers/gpu/drm/drm_dp_cec.c
+++ b/drivers/gpu/drm/drm_dp_cec.c
@@ -14,6 +14,7 @@
#include <drm/drm_connector.h>
#include <drm/drm_device.h>
#include <drm/drm_dp_helper.h>
+#include <drm/drm_dp_mst_helper.h>
/*
* Unfortunately it turns out that we have a chicken-and-egg situation
@@ -338,8 +339,6 @@ void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid)
if (aux->cec.adap) {
if (aux->cec.adap->capabilities == cec_caps &&
aux->cec.adap->available_log_addrs == num_las) {
- /* Unchanged, so just set the phys addr */
- cec_s_phys_addr_from_edid(aux->cec.adap, edid);
goto unlock;
}
/*
@@ -364,15 +363,16 @@ void drm_dp_cec_set_edid(struct drm_dp_aux *aux, const struct edid *edid)
if (cec_register_adapter(aux->cec.adap, connector->dev->dev)) {
cec_delete_adapter(aux->cec.adap);
aux->cec.adap = NULL;
- } else {
- /*
- * Update the phys addr for the new CEC adapter. When called
- * from drm_dp_cec_register_connector() edid == NULL, so in
- * that case the phys addr is just invalidated.
- */
- cec_s_phys_addr_from_edid(aux->cec.adap, edid);
}
unlock:
+ /*
+ * Update the phys addr for the new CEC adapter. When called
+ * from drm_dp_cec_register_connector() edid == NULL, so in
+ * that case the phys addr is just invalidated.
+ */
+ if (aux->cec.adap && edid) {
+ cec_s_phys_addr_from_edid(aux->cec.adap, edid);
+ }
mutex_unlock(&aux->cec.lock);
}
EXPORT_SYMBOL(drm_dp_cec_set_edid);
@@ -418,6 +418,7 @@ EXPORT_SYMBOL(drm_dp_cec_unset_edid);
* drm_dp_cec_register_connector() - register a new connector
* @aux: DisplayPort AUX channel
* @connector: drm connector
+ * @is_mst: set to true if this is an MST branch
*
* A new connector was registered with associated CEC adapter name and
* CEC adapter parent device. After registering the name and parent
@@ -425,12 +426,13 @@ EXPORT_SYMBOL(drm_dp_cec_unset_edid);
* CEC and to register a CEC adapter if that is the case.
*/
void drm_dp_cec_register_connector(struct drm_dp_aux *aux,
- struct drm_connector *connector)
+ struct drm_connector *connector, bool is_mst)
{
WARN_ON(aux->cec.adap);
if (WARN_ON(!aux->transfer))
return;
aux->cec.connector = connector;
+ aux->cec.is_mst = is_mst;
INIT_DELAYED_WORK(&aux->cec.unregister_work,
drm_dp_cec_unregister_work);
}
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 82b9de274f65..744cb55572f9 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -6261,7 +6261,7 @@ 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);
+ drm_dp_cec_register_connector(&intel_dp->aux, connector, false);
return ret;
}
diff --git a/drivers/gpu/drm/nouveau/nouveau_connector.c b/drivers/gpu/drm/nouveau/nouveau_connector.c
index 49dd0cbc332f..671a70e95cd1 100644
--- a/drivers/gpu/drm/nouveau/nouveau_connector.c
+++ b/drivers/gpu/drm/nouveau/nouveau_connector.c
@@ -1414,7 +1414,7 @@ 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);
+ drm_dp_cec_register_connector(&nv_connector->aux, connector, false);
break;
}
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 85513eeb2196..12bca1b9512b 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1495,12 +1495,14 @@ struct drm_connector;
* @lock: mutex protecting this struct
* @adap: the CEC adapter for CEC-Tunneling-over-AUX support.
* @connector: the connector this CEC adapter is associated with
+ * @is_mst: this is an MST branch
* @unregister_work: unregister the CEC adapter
*/
struct drm_dp_aux_cec {
struct mutex lock;
struct cec_adapter *adap;
struct drm_connector *connector;
+ bool is_mst;
struct delayed_work unregister_work;
};
@@ -1746,7 +1748,7 @@ drm_dp_has_quirk(const struct drm_dp_desc *desc, u32 edid_quirks,
#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,
- struct drm_connector *connector);
+ struct drm_connector *connector, bool is_mst);
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);
@@ -1757,7 +1759,7 @@ 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,
- struct drm_connector *connector)
+ struct drm_connector *connector, bool is_mst)
{
}
--
2.28.0.402.g5ffc5be6b7-goog