path: root/include/drm/drm_dp_helper.h
diff options
authorDave Airlie <airlied@redhat.com>2014-06-04 16:02:28 +1000
committerDave Airlie <airlied@redhat.com>2014-06-05 09:54:29 +1000
commit4f71d0cb76339a10fd445b0b281acc45c71b6271 (patch)
tree9badd446ee865db48ebebe77ed8f4e3b3ca089aa /include/drm/drm_dp_helper.h
parent885ae1c55ae46ee1064bc7cb99dc45ddd8bd0328 (diff)
drm/dp: add a hw mutex around the transfer functions. (v2)
This should avoid races between connector probing and HPD irqs in the future, currently mode_config.mutex blocks this possibility. Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'include/drm/drm_dp_helper.h')
1 files changed, 4 insertions, 3 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 488b41635dec..a21568bf1514 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -514,6 +514,7 @@ struct drm_dp_aux_msg {
* @name: user-visible name of this AUX channel and the I2C-over-AUX adapter
* @ddc: I2C adapter that can be used for I2C-over-AUX communication
* @dev: pointer to struct device that is the parent for this AUX channel
+ * @hw_mutex: internal mutex used for locking transfers
* @transfer: transfers a message representing a single AUX transaction
* The .dev field should be set to a pointer to the device that implements
@@ -546,7 +547,7 @@ struct drm_dp_aux {
const char *name;
struct i2c_adapter ddc;
struct device *dev;
+ struct mutex hw_mutex;
ssize_t (*transfer)(struct drm_dp_aux *aux,
struct drm_dp_aux_msg *msg);
@@ -605,7 +606,7 @@ int drm_dp_link_probe(struct drm_dp_aux *aux, struct drm_dp_link *link);
int drm_dp_link_power_up(struct drm_dp_aux *aux, struct drm_dp_link *link);
int drm_dp_link_configure(struct drm_dp_aux *aux, struct drm_dp_link *link);
-int drm_dp_aux_register_i2c_bus(struct drm_dp_aux *aux);
-void drm_dp_aux_unregister_i2c_bus(struct drm_dp_aux *aux);
+int drm_dp_aux_register(struct drm_dp_aux *aux);
+void drm_dp_aux_unregister(struct drm_dp_aux *aux);
#endif /* _DRM_DP_HELPER_H_ */

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