From: Thierry Reding <>

Userspace needs to know the version of the interface implemented by a
client so it can create the proper command streams. Allow individual
drivers to store this version along with the client so that it can be
returned to userspace upon opening a channel.

Signed-off-by: Thierry Reding <>
 include/linux/host1x.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/linux/host1x.h b/include/linux/host1x.h
index 89110d896d72..57d26406bdfd 100644
--- a/include/linux/host1x.h
+++ b/include/linux/host1x.h
@@ -49,6 +49,7 @@ struct host1x_client_ops {
  * @dev: pointer to struct device backing this host1x client
  * @ops: host1x client operations
  * @class: host1x class represented by this client
+ * @version: interface version implemented by this client
  * @channel: host1x channel associated with this client
  * @syncpts: array of syncpoints requested for this client
  * @num_syncpts: number of syncpoints requested for this client
@@ -61,6 +62,8 @@ struct host1x_client {
        const struct host1x_client_ops *ops;
        enum host1x_class class;
+       unsigned int version;
        struct host1x_channel *channel;
        struct host1x_syncpt **syncpts;

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