On 05/17/2018 06:34 PM, Thierry Reding wrote:
From: Thierry Reding <treding@xxxxxxxxxx>
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 <treding@xxxxxxxxxx>
---
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;
+
It doesn't seem to me that this fits here - Host1x doesn't provide any
userspace interface, TegraDRM does. We will (hopefully) have clients in
the future that use a different userspace interface, or don't have one
at all. So this property should be on TegraDRM side instead.
Mikko
struct host1x_channel *channel;
struct host1x_syncpt **syncpts;
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