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Subject: [PATCH v10 1/9] device property: Add remote endpoint to devcon matcher
Date:   Thu, 12 Jan 2023 12:20:56 +0800
Message-Id: <20230112042104.4107253-2-treapking@chromium.org>
In-Reply-To: <20230112042104.4107253-1-treapking@chromium.org>
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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: Chen-Yu Tsai <wenst@chromium.org>
Tested-by: Chen-Yu Tsai <wenst@chromium.org>

---

Changes in v10:
- Collected Reviewed-by and Tested-by tags

Changes in v6:
- New in v6

 drivers/base/property.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/base/property.c b/drivers/base/property.c
index 2a5a37fcd998..48877af4e444 100644
--- a/drivers/base/property.c
+++ b/drivers/base/property.c
@@ -1223,6 +1223,21 @@ static unsigned int fwnode_graph_devcon_matches(struct fwnode_handle *fwnode,
 			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);
+		if (fwnode_device_is_available(node)) {
+			ret = match(node, con_id, data);
+			if (ret) {
+				if (matches)
+					matches[count] = ret;
+				count++;
+			}
+		}
+
 		node = fwnode_graph_get_remote_port_parent(ep);
 		if (!fwnode_device_is_available(node)) {
 			fwnode_handle_put(node);
-- 
2.39.0.314.g84b9a713c41-goog