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Message-Id: <20230331091145.737305-2-treapking@chromium.org>
Date: Fri, 31 Mar 2023 17:11:36 +0800
From: Pin-yen Lin <treapking@...omium.org>
To: Andrzej Hajda <andrzej.hajda@...el.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Robert Foss <rfoss@...nel.org>,
Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
Jonas Karlman <jonas@...boo.se>,
Jernej Skrabec <jernej.skrabec@...il.com>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Daniel Scally <djrscally@...il.com>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Prashant Malani <pmalani@...omium.org>,
Benson Leung <bleung@...omium.org>,
Guenter Roeck <groeck@...omium.org>
Cc: Xin Ji <xji@...logixsemi.com>, Marek Vasut <marex@...x.de>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Thomas Zimmermann <tzimmermann@...e.de>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Lyude Paul <lyude@...hat.com>, devicetree@...r.kernel.org,
Stephen Boyd <swboyd@...omium.org>,
dri-devel@...ts.freedesktop.org, linux-acpi@...r.kernel.org,
chrome-platform@...ts.linux.dev,
Nícolas F . R . A . Prado
<nfraprado@...labora.com>,
Javier Martinez Canillas <javierm@...hat.com>,
Pin-yen Lin <treapking@...omium.org>,
linux-kernel@...r.kernel.org
Subject: [PATCH v15 01/10] device property: Add remote endpoint to devcon matcher
From: Prashant Malani <pmalani@...omium.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@...omium.org>
Signed-off-by: Pin-yen Lin <treapking@...omium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Reviewed-by: Sakari Ailus <sakari.ailus@...ux.intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
---
(no changes since v14)
Changes in v14:
- Collect review tags
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.
*
--
2.40.0.348.gf938b09366-goog
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