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authorAjay Kumar <ajaykumar.rs@samsung.com>2015-01-20 22:08:44 +0530
committerThierry Reding <treding@nvidia.com>2015-01-28 08:45:40 +0100
commit3d3f8b1f8b62c3a010976269df454baa9246fc65 (patch)
tree855bd2b86afa52afbd7b872959789b028ff630ce /include/drm/bridge
parentb07b90fd178a4797b0454ead491b717b41046bee (diff)
downloadlinux-3d3f8b1f8b62c3a010976269df454baa9246fc65.tar.bz2
drm/bridge: make bridge registration independent of drm flow
Currently, third party bridge drivers(ptn3460) are dependent on the corresponding encoder driver init, since bridge driver needs a drm_device pointer to finish drm initializations. The encoder driver passes the drm_device pointer to the bridge driver. Because of this dependency, third party drivers like ptn3460 doesn't adhere to the driver model. In this patch, we reframe the bridge registration framework so that bridge initialization is split into 2 steps, and bridge registration happens independent of drm flow: --Step 1: gather all the bridge settings independent of drm and add the bridge onto a global list of bridges. --Step 2: when the encoder driver is probed, call drm_bridge_attach for the corresponding bridge so that the bridge receives drm_device pointer and continues with connector and other drm initializations. The old set of bridge helpers are removed, and a set of new helpers are added to accomplish the 2 step initialization. The bridge devices register themselves onto global list of bridges when they get probed by calling "drm_bridge_add". The parent encoder driver waits till the bridge is available in the lookup table(by calling "of_drm_find_bridge") and then continues with its initialization. The encoder driver should also call "drm_bridge_attach" to pass on the drm_device to the bridge object. drm_bridge_attach inturn calls "bridge->funcs->attach" so that bridge can continue with drm related initializations. Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com> Acked-by: Inki Dae <inki.dae@samsung.com> Tested-by: Rahul Sharma <rahul.sharma@samsung.com> Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> Tested-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk> Tested-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'include/drm/bridge')
-rw-r--r--include/drm/bridge/ptn3460.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/drm/bridge/ptn3460.h b/include/drm/bridge/ptn3460.h
index ff62344fec6c..b11f8e17e72f 100644
--- a/include/drm/bridge/ptn3460.h
+++ b/include/drm/bridge/ptn3460.h
@@ -15,6 +15,7 @@
#define _DRM_BRIDGE_PTN3460_H_
struct drm_device;
+struct drm_bridge;
struct drm_encoder;
struct i2c_client;
struct device_node;
@@ -23,6 +24,9 @@ struct device_node;
int ptn3460_init(struct drm_device *dev, struct drm_encoder *encoder,
struct i2c_client *client, struct device_node *node);
+
+void ptn3460_destroy(struct drm_bridge *bridge);
+
#else
static inline int ptn3460_init(struct drm_device *dev,
@@ -32,6 +36,10 @@ static inline int ptn3460_init(struct drm_device *dev,
return 0;
}
+static inline void ptn3460_destroy(struct drm_bridge *bridge)
+{
+}
+
#endif
#endif