[igt-dev] [PATCH i-g-t v2 1/2] lib/igt_kms: added tile property parser

[Madhumitha Tolakanahalli Pradeep]

The tile property parser parses the connector tile property obtained
from connector's Display ID block and set per connector.

v2: Minor style changes (Simon)

Cc: Manasi Navare <manasi.d.navare at intel.com>
Cc: Petri Latvala <petri.latvala at intel.com>
Cc: Simon Ser <simon.ser at intel.com>

Cc: <madhumitha.tp at gmail.com>

Signed-off-by: Madhumitha Tolakanahalli Pradeep <madhumitha.tolakanahalli.pradeep at intel.com>
---
 lib/igt_kms.c | 29 +++++++++++++++++++++++++++++
 lib/igt_kms.h | 11 +++++++++++
 2 files changed, 40 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 17a7d2b6..dc0f810d 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -4515,3 +4515,32 @@ bool igt_display_has_format_mod(igt_display_t *display, uint32_t format,
 
 	return false;
 }
+
+/**
+ * igt_parse_connector_tile_blob:
+ * @blob: pointer to the connector's tile properties
+ * @tile: pointer to tile structure that is populated by the function
+ *
+ * Parses the connector tile blob to extract the tile information.
+ * The blob information is exposed from drm/drm_connector.c in the kernel.
+ * The format of the tile property is defined in the kernel as char tile[256]
+ * that consists of 8 integers that are ':' separated.
+ *
+ */
+
+void igt_parse_connector_tile_blob(drmModePropertyBlobPtr blob,
+		igt_tile_info_t *tile)
+{
+	char *blob_data = blob->data;
+
+	igt_assert(blob);
+
+	tile->tile_group_id = atoi(strtok(blob_data, ":"));
+	tile->tile_is_single_monitor = atoi(strtok(NULL, ":"));
+	tile->num_h_tile = atoi(strtok(NULL, ":"));
+	tile->num_v_tile = atoi(strtok(NULL, ":"));
+	tile->tile_h_loc = atoi(strtok(NULL, ":"));
+	tile->tile_v_loc = atoi(strtok(NULL, ":"));
+	tile->tile_h_size = atoi(strtok(NULL, ":"));
+	tile->tile_v_size = atoi(strtok(NULL, ":"));
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 56481fd1..aebb4d31 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -390,6 +390,14 @@ struct igt_display {
 	int format_mod_count;
 };
 
+typedef struct {
+	int tile_group_id;
+	bool tile_is_single_monitor;
+	uint8_t num_h_tile, num_v_tile;
+	uint8_t tile_h_loc, tile_v_loc;
+	uint16_t tile_h_size, tile_v_size;
+} igt_tile_info_t;
+
 void igt_display_require(igt_display_t *display, int drm_fd);
 void igt_display_fini(igt_display_t *display);
 void igt_display_reset(igt_display_t *display);
@@ -834,4 +842,7 @@ static inline bool igt_vblank_before(uint32_t a, uint32_t b)
 	return igt_vblank_after(b, a);
 }
 
+void igt_parse_connector_tile_blob(drmModePropertyBlobPtr blob,
+		igt_tile_info_t *tile);
+
 #endif /* __IGT_KMS_H__ */
-- 
2.17.1