[PATCH i-g-t v3 26/29] lib/unigraf: Add configuration for CRC usage

[Louis Chauvet]

As Unigraf devices are able to compute a CRC for the input image, add a
configuration file option to use them.

Signed-off-by: Louis Chauvet <louis.chauvet at bootlin.com>
---
 lib/unigraf/unigraf.c | 20 ++++++++++++++++++++
 lib/unigraf/unigraf.h |  8 ++++++++
 2 files changed, 28 insertions(+)

diff --git a/lib/unigraf/unigraf.c b/lib/unigraf/unigraf.c
index e63182ccc61ca23c9333d1c36950a5d73f94b3ea..e2a26f9bb199d83d9a1474ac2613a181450e0530 100644
--- a/lib/unigraf/unigraf.c
+++ b/lib/unigraf/unigraf.c
@@ -22,6 +22,7 @@ static int unigraf_open_count;
 static TSI_HANDLE unigraf_device;
 static char *unigraf_default_edid;
 static char *unigraf_connector_name;
+static bool unigraf_crc;
 
 /**
  * UNIGRAF_NAME_MAX - Maximum name length to be used for TSI functions
@@ -58,6 +59,11 @@ static char *unigraf_connector_name;
  */
 #define UNIGRAF_CONFIG_EDID_NAME "EDID"
 
+/**
+ * UNIGRAF_CONFIG_USE_CRC_NAME - Key of the CRC selection in the configuration file
+ */
+#define UNIGRAF_CONFIG_USE_CRC_NAME "UseCRC"
+
 /**
  * UNIGRAF_DEFAULT_ROLE_NAME - Default role name to search on the unigraf device
  */
@@ -290,6 +296,7 @@ bool unigraf_open_device(int drm_fd)
 		cfg_input = NULL;
 		cfg_edid_name = NULL;
 		unigraf_connector_name = NULL;
+		unigraf_crc = true;
 	} else {
 		cfg_device = g_key_file_get_string(igt_key_file, cfg_group,
 						   UNIGRAF_CONFIG_DEVICE_NAME, &cfg_error);
@@ -330,6 +337,14 @@ bool unigraf_open_device(int drm_fd)
 			unigraf_debug("No default EDID set, use IGT default.\n");
 			cfg_edid_name = NULL;
 		}
+
+		cfg_error = NULL;
+		unigraf_crc = g_key_file_get_boolean(igt_key_file, cfg_group,
+						     UNIGRAF_CONFIG_USE_CRC_NAME, &cfg_error);
+		if (cfg_error) {
+			unigraf_debug("CRC usage not configured, using unigraf CRC.\n");
+			unigraf_crc = true;
+		}
 	}
 
 	unigraf_assert(TSIX_DEV_RescanDevices(0, TSI_DEVCAP_VIDEO_CAPTURE, 0));
@@ -571,3 +586,8 @@ void unigraf_read_crc(int stream, igt_crc_t *out)
 	out->n_words = 3;
 	out->has_valid_frame = false;
 }
+
+bool unigraf_use_crc(void)
+{
+	return unigraf_crc;
+}
diff --git a/lib/unigraf/unigraf.h b/lib/unigraf/unigraf.h
index cf37054baf4dd9d8115cd6b2abce70400254c301..e2013e8dd887389b573fbc3faddffb119f10c9b5 100644
--- a/lib/unigraf/unigraf.h
+++ b/lib/unigraf/unigraf.h
@@ -164,4 +164,12 @@ void unigraf_select_stream(int stream);
  */
 void unigraf_read_crc(int stream, igt_crc_t *out);
 
+/**
+ * unigraf_use_crc() - Check if Unigraf device should be used for CRC computation
+ *
+ * Returns: true if the Unigraf device should be used for CRC computation,
+ *          false otherwise.
+ */
+bool unigraf_use_crc(void);
+
 #endif // UNIGRAF_H

-- 
2.50.1