| Message ID | 20230303143350.815623-2-treapking@chromium.org |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Register Type-C mode-switch in DP bridge endpoints | expand |
On Fri, Mar 03, 2023 at 10:33:41PM +0800, Pin-yen Lin wrote: > From: Prashant Malani <pmalani@chromium.org> > > When searching the device graph for device matches, check the > remote-endpoint itself for a match. > > Some drivers register devices for individual endpoints. This allows > the matcher code to evaluate those for a match too, instead > of only looking at the remote parent devices. This is required when a > device supports two mode switches in its endpoints, so we can't simply > register the mode switch with the parent node. > > Signed-off-by: Prashant Malani <pmalani@chromium.org> > Signed-off-by: Pin-yen Lin <treapking@chromium.org> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> > --- > > Changes in v13: > - Update the kernel doc of fwnode_connection_find_match > > Changes in v12: > - Check the availability of the device node in fwnode_graph_devcon_matches > - Ensured valid access to "matches" in fwnode_graph_devcon_matches > - Updated the documentation in fwnode_connection_find_match(es) > - Dropped collected tags due to the new changes > > Changes in v11: > - Added missing fwnode_handle_put in drivers/base/property.c > > Changes in v10: > - Collected Reviewed-by and Tested-by tags > > Changes in v6: > - New in v6 > > drivers/base/property.c | 31 ++++++++++++++++++++++++++----- > 1 file changed, 26 insertions(+), 5 deletions(-) > > diff --git a/drivers/base/property.c b/drivers/base/property.c > index 083a95791d3b..4426ac2b16ca 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -1243,6 +1243,23 @@ static unsigned int fwnode_graph_devcon_matches(const struct fwnode_handle *fwno > continue; > } > > + ret = match(node, con_id, data); > + fwnode_handle_put(node); > + if (ret) { > + if (matches) > + matches[count] = ret; > + count++; > + > + if (matches && count >= matches_len) > + break; > + } > + > + /* > + * Some drivers may register devices for endpoints. Check > + * the remote-endpoints for matches in addition to the remote > + * port parent. > + */ > + node = fwnode_graph_get_remote_endpoint(ep); > ret = match(node, con_id, data); > fwnode_handle_put(node); > if (ret) { > @@ -1293,8 +1310,11 @@ static unsigned int fwnode_devcon_matches(const struct fwnode_handle *fwnode, > * @match: Function to check and convert the connection description > * > * Find a connection with unique identifier @con_id between @fwnode and another > - * device node. @match will be used to convert the connection description to > - * data the caller is expecting to be returned. > + * device node. For fwnode graph connections, the graph endpoints are also > + * checked. @match will be used to convert the connection description to data > + * the caller is expecting to be returned. > + * > + * Return: The pointer to the matched node, or NULL on error. > */ > void *fwnode_connection_find_match(const struct fwnode_handle *fwnode, > const char *con_id, void *data, > @@ -1325,9 +1345,10 @@ EXPORT_SYMBOL_GPL(fwnode_connection_find_match); > * @matches_len: Length of @matches > * > * Find up to @matches_len connections with unique identifier @con_id between > - * @fwnode and other device nodes. @match will be used to convert the > - * connection description to data the caller is expecting to be returned > - * through the @matches array. > + * @fwnode and other device nodes. For fwnode graph connections, the graph > + * endpoints are also checked. @match will be used to convert the connection > + * description to data the caller is expecting to be returned through the > + * @matches array. > * If @matches is NULL @matches_len is ignored and the total number of resolved > * matches is returned. > * > -- > 2.40.0.rc0.216.gc4246ad0f0-goog
diff --git a/drivers/base/property.c b/drivers/base/property.c index 083a95791d3b..4426ac2b16ca 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -1243,6 +1243,23 @@ static unsigned int fwnode_graph_devcon_matches(const struct fwnode_handle *fwno continue; } + ret = match(node, con_id, data); + fwnode_handle_put(node); + if (ret) { + if (matches) + matches[count] = ret; + count++; + + if (matches && count >= matches_len) + break; + } + + /* + * Some drivers may register devices for endpoints. Check + * the remote-endpoints for matches in addition to the remote + * port parent. + */ + node = fwnode_graph_get_remote_endpoint(ep); ret = match(node, con_id, data); fwnode_handle_put(node); if (ret) { @@ -1293,8 +1310,11 @@ static unsigned int fwnode_devcon_matches(const struct fwnode_handle *fwnode, * @match: Function to check and convert the connection description * * Find a connection with unique identifier @con_id between @fwnode and another - * device node. @match will be used to convert the connection description to - * data the caller is expecting to be returned. + * device node. For fwnode graph connections, the graph endpoints are also + * checked. @match will be used to convert the connection description to data + * the caller is expecting to be returned. + * + * Return: The pointer to the matched node, or NULL on error. */ void *fwnode_connection_find_match(const struct fwnode_handle *fwnode, const char *con_id, void *data, @@ -1325,9 +1345,10 @@ EXPORT_SYMBOL_GPL(fwnode_connection_find_match); * @matches_len: Length of @matches * * Find up to @matches_len connections with unique identifier @con_id between - * @fwnode and other device nodes. @match will be used to convert the - * connection description to data the caller is expecting to be returned - * through the @matches array. + * @fwnode and other device nodes. For fwnode graph connections, the graph + * endpoints are also checked. @match will be used to convert the connection + * description to data the caller is expecting to be returned through the + * @matches array. * If @matches is NULL @matches_len is ignored and the total number of resolved * matches is returned. *