[PATCH 2/3] drm/msm: Centralize connector registration/unregistration
Archit Taneja
architt at codeaurora.org
Tue Apr 19 10:56:35 UTC 2016
Move the drm_connector registration from the encoder(HDMI/DSI etc) drivers
to the msm platform driver. This will simplify the task of ensuring that
the connectors are registered only after the drm_device itself is
registered.
The connectors' destroy ops are made to use kzalloc instead of
devm_kzalloc to ensure that that the connectors can be successfully
unregistered when the msm driver module is removed. The memory for the
connectors is unallocated when drm_mode_config_cleanup() is called
during either during an error or during driver remove.
Signed-off-by: Archit Taneja <architt at codeaurora.org>
---
drivers/gpu/drm/msm/dsi/dsi_manager.c | 27 ++++++++--------------
drivers/gpu/drm/msm/edp/edp_connector.c | 20 ++++------------
drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 17 +++-----------
drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_connector.c | 16 ++-----------
drivers/gpu/drm/msm/msm_drv.c | 15 ++++++++++++
5 files changed, 33 insertions(+), 62 deletions(-)
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 58ba7ec..c8d1f19 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -198,9 +198,13 @@ static enum drm_connector_status dsi_mgr_connector_detect(
static void dsi_mgr_connector_destroy(struct drm_connector *connector)
{
+ struct dsi_connector *dsi_connector = to_dsi_connector(connector);
+
DBG("");
- drm_connector_unregister(connector);
+
drm_connector_cleanup(connector);
+
+ kfree(dsi_connector);
}
static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
@@ -538,12 +542,9 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id)
struct dsi_connector *dsi_connector;
int ret, i;
- dsi_connector = devm_kzalloc(msm_dsi->dev->dev,
- sizeof(*dsi_connector), GFP_KERNEL);
- if (!dsi_connector) {
- ret = -ENOMEM;
- goto fail;
- }
+ dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
+ if (!dsi_connector)
+ return ERR_PTR(-ENOMEM);
dsi_connector->id = id;
@@ -552,7 +553,7 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id)
ret = drm_connector_init(msm_dsi->dev, connector,
&dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
if (ret)
- goto fail;
+ return ERR_PTR(ret);
drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
@@ -565,21 +566,11 @@ struct drm_connector *msm_dsi_manager_connector_init(u8 id)
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
- ret = drm_connector_register(connector);
- if (ret)
- goto fail;
-
for (i = 0; i < MSM_DSI_ENCODER_NUM; i++)
drm_mode_connector_attach_encoder(connector,
msm_dsi->encoders[i]);
return connector;
-
-fail:
- if (connector)
- dsi_mgr_connector_destroy(connector);
-
- return ERR_PTR(ret);
}
/* initialize bridge */
diff --git a/drivers/gpu/drm/msm/edp/edp_connector.c b/drivers/gpu/drm/msm/edp/edp_connector.c
index b4d1b46..72360cd 100644
--- a/drivers/gpu/drm/msm/edp/edp_connector.c
+++ b/drivers/gpu/drm/msm/edp/edp_connector.c
@@ -37,7 +37,7 @@ static void edp_connector_destroy(struct drm_connector *connector)
struct edp_connector *edp_connector = to_edp_connector(connector);
DBG("");
- drm_connector_unregister(connector);
+
drm_connector_cleanup(connector);
kfree(edp_connector);
@@ -124,10 +124,8 @@ struct drm_connector *msm_edp_connector_init(struct msm_edp *edp)
int ret;
edp_connector = kzalloc(sizeof(*edp_connector), GFP_KERNEL);
- if (!edp_connector) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!edp_connector)
+ return ERR_PTR(-ENOMEM);
edp_connector->edp = edp;
@@ -136,7 +134,7 @@ struct drm_connector *msm_edp_connector_init(struct msm_edp *edp)
ret = drm_connector_init(edp->dev, connector, &edp_connector_funcs,
DRM_MODE_CONNECTOR_eDP);
if (ret)
- goto fail;
+ return ERR_PTR(ret);
drm_connector_helper_add(connector, &edp_connector_helper_funcs);
@@ -147,17 +145,7 @@ struct drm_connector *msm_edp_connector_init(struct msm_edp *edp)
connector->interlace_allowed = false;
connector->doublescan_allowed = false;
- ret = drm_connector_register(connector);
- if (ret)
- goto fail;
-
drm_mode_connector_attach_encoder(connector, edp->encoder);
return connector;
-
-fail:
- if (connector)
- edp_connector_destroy(connector);
-
- return ERR_PTR(ret);
}
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
index ce86117..9cc84ce 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c
@@ -346,7 +346,6 @@ static void hdmi_connector_destroy(struct drm_connector *connector)
hdp_disable(hdmi_connector);
- drm_connector_unregister(connector);
drm_connector_cleanup(connector);
kfree(hdmi_connector);
@@ -438,10 +437,8 @@ struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi)
int ret;
hdmi_connector = kzalloc(sizeof(*hdmi_connector), GFP_KERNEL);
- if (!hdmi_connector) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!hdmi_connector)
+ return ERR_PTR(-ENOMEM);
hdmi_connector->hdmi = hdmi;
INIT_WORK(&hdmi_connector->hpd_work, msm_hdmi_hotplug_work);
@@ -458,21 +455,13 @@ struct drm_connector *msm_hdmi_connector_init(struct hdmi *hdmi)
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
- drm_connector_register(connector);
-
ret = hpd_enable(hdmi_connector);
if (ret) {
dev_err(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret);
- goto fail;
+ return ERR_PTR(ret);
}
drm_mode_connector_attach_encoder(connector, hdmi->encoder);
return connector;
-
-fail:
- if (connector)
- hdmi_connector_destroy(connector);
-
- return ERR_PTR(ret);
}
diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_connector.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_connector.c
index e73e174..2648cd7 100644
--- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_connector.c
+++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_connector.c
@@ -48,7 +48,6 @@ static void mdp4_lvds_connector_destroy(struct drm_connector *connector)
struct mdp4_lvds_connector *mdp4_lvds_connector =
to_mdp4_lvds_connector(connector);
- drm_connector_unregister(connector);
drm_connector_cleanup(connector);
kfree(mdp4_lvds_connector);
@@ -121,13 +120,10 @@ struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev,
{
struct drm_connector *connector = NULL;
struct mdp4_lvds_connector *mdp4_lvds_connector;
- int ret;
mdp4_lvds_connector = kzalloc(sizeof(*mdp4_lvds_connector), GFP_KERNEL);
- if (!mdp4_lvds_connector) {
- ret = -ENOMEM;
- goto fail;
- }
+ if (!mdp4_lvds_connector)
+ return ERR_PTR(-ENOMEM);
mdp4_lvds_connector->encoder = encoder;
mdp4_lvds_connector->panel_node = panel_node;
@@ -143,15 +139,7 @@ struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev,
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
- drm_connector_register(connector);
-
drm_mode_connector_attach_encoder(connector, encoder);
return connector;
-
-fail:
- if (connector)
- mdp4_lvds_connector_destroy(connector);
-
- return ERR_PTR(ret);
}
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index c03b967..47f40d9 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -197,6 +197,8 @@ static int msm_unload(struct drm_device *dev)
drm_kms_helper_poll_fini(dev);
+ drm_connector_unregister_all(dev);
+
#ifdef CONFIG_DRM_FBDEV_EMULATION
if (fbdev && priv->fbdev)
msm_fbdev_free(dev);
@@ -326,6 +328,7 @@ static int msm_load(struct drm_device *dev, unsigned long flags)
struct platform_device *pdev = dev->platformdev;
struct msm_drm_private *priv;
struct msm_kms *kms;
+ struct drm_connector *connector;
int ret;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
@@ -410,6 +413,18 @@ static int msm_load(struct drm_device *dev, unsigned long flags)
goto fail;
}
+ mutex_lock(&dev->mode_config.mutex);
+
+ drm_for_each_connector(connector, dev) {
+ ret = drm_connector_register(connector);
+ if (ret) {
+ mutex_unlock(&dev->mode_config.mutex);
+ goto fail;
+ }
+ }
+
+ mutex_unlock(&dev->mode_config.mutex);
+
drm_mode_config_reset(dev);
#ifdef CONFIG_DRM_FBDEV_EMULATION
--
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