[igt-dev] [PATCH i-g-t v4 09/10] lib/igt_chamelium: add chamelium_get_video_ports

[Simon Ser <simon.ser@intel.com>]

This function queries the video port IDs supported by the Chamelium device.
It'll be used to know on which ports we can perform auto-detection.

An alternative would be to hardcode a list of port IDs. However port IDs are
specific to each Chamelium board, and will change for a different
implementation. Also it would be nice to have simulators implement the
Chamelium API…

Signed-off-by: Simon Ser <simon.ser@intel.com>
---
 lib/igt_chamelium.c | 44 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/lib/igt_chamelium.c b/lib/igt_chamelium.c
index 959a14333ed9..3cd2acafd385 100644
--- a/lib/igt_chamelium.c
+++ b/lib/igt_chamelium.c
@@ -1758,6 +1758,50 @@ static unsigned int chamelium_get_port_type(struct chamelium *chamelium,
 	return port_type;
 }
 
+static bool chamelium_has_video_support(struct chamelium *chamelium,
+					int port_id)
+{
+	xmlrpc_value *res;
+	int has_video_support;
+
+	res = chamelium_rpc(chamelium, NULL, "HasVideoSupport", "(i)", port_id);
+	xmlrpc_read_bool(&chamelium->env, res, &has_video_support);
+	xmlrpc_DECREF(res);
+
+	return has_video_support;
+}
+
+/**
+ * chamelium_get_video_ports: retrieve a list of video port IDs
+ *
+ * Returns: the number of video port IDs
+ */
+static size_t chamelium_get_video_ports(struct chamelium *chamelium,
+					int port_ids[static CHAMELIUM_MAX_PORTS])
+{
+	xmlrpc_value *res, *res_port;
+	int res_len, i, port_id;
+	size_t port_ids_len = 0;
+
+	res = chamelium_rpc(chamelium, NULL, "GetSupportedInputs", "()");
+	res_len = xmlrpc_array_size(&chamelium->env, res);
+	for (i = 0; i < res_len; i++) {
+		xmlrpc_array_read_item(&chamelium->env, res, i, &res_port);
+		xmlrpc_read_int(&chamelium->env, res_port, &port_id);
+		xmlrpc_DECREF(res_port);
+
+		if (!chamelium_has_video_support(chamelium, port_id))
+			continue;
+
+		igt_assert(port_ids_len < CHAMELIUM_MAX_PORTS);
+		port_ids[port_ids_len] = port_id;
+		port_ids_len++;
+	}
+	xmlrpc_DECREF(res);
+
+	return port_ids_len;
+}
+
 static bool chamelium_read_port_mappings(struct chamelium *chamelium,
 					 int drm_fd)
 {
-- 
2.22.0

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