drm/msm: Centralize connector registration/unregistration

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@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index 58ba7ec..c8d1f19 100644 (file)
--- 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 (file)
--- 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 e350b2e..b15d726 100644 (file)
--- 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 (file)
--- 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 c257cdd..336070d 100644 (file)
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -199,6 +199,8 @@ 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);
@@ -414,6 +416,12 @@ static int msm_load(struct drm_device *dev, unsigned long flags)
                goto fail;
        }
 
+       ret = drm_connector_register_all(dev);
+       if (ret) {
+               dev_err(dev->dev, "failed to register connectors\n");
+               goto fail;
+       }
+
        drm_mode_config_reset(dev);
 
 #ifdef CONFIG_DRM_FBDEV_EMULATION