[PATCH i-g-t 1/3] lib/igt_kms: Added library functions for LOBF status

[Jeevan B]

Added helper functions to check LOBF status to check weather
it is enabled or disabled.

v2: rename function name.

Signed-off-by: Jeevan B <jeevan.b at intel.com>
Reviewed-by: Kunal Joshi <kunal1.joshi at intel.com>
---
 lib/igt_kms.c | 23 +++++++++++++++++++++++
 lib/igt_kms.h |  1 +
 2 files changed, 24 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 64318ef7f..e030b35a6 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -6071,6 +6071,29 @@ void igt_dump_crtcs_fd(int drmfd)
 	drmModeFreeResources(mode_resources);
 }
 
+/**
+ * igt_get_i915_edp_lobf_status
+ * @drmfd: A drm file descriptor
+ * @connector_name: Name of the libdrm connector we're going to use
+ *
+ * Return: True if its enabled.
+ */
+bool igt_get_i915_edp_lobf_status(int drmfd, char *connector_name)
+{
+	char buf[24];
+	int fd, res;
+
+	fd = igt_debugfs_connector_dir(drmfd, connector_name, O_RDONLY);
+	igt_assert(fd >= 0);
+
+	res = igt_debugfs_simple_read(fd, "i915_edp_lobf_info", buf, sizeof(buf));
+	igt_require(res > 0);
+
+	close(fd);
+
+	return strstr(buf, "LOBF status: enabled");
+}
+
 /**
  * igt_get_output_max_bpc:
  * @drmfd: A drm file descriptor
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 501d48763..e8582a45b 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -1195,6 +1195,7 @@ void igt_require_pipe(igt_display_t *display,
 void igt_dump_connectors_fd(int drmfd);
 void igt_dump_crtcs_fd(int drmfd);
 bool igt_override_all_active_output_modes_to_fit_bw(igt_display_t *display);
+bool igt_get_i915_edp_lobf_status(int drmfd, char *connector_name);
 unsigned int igt_get_output_max_bpc(int drmfd, char *connector_name);
 unsigned int igt_get_pipe_current_bpc(int drmfd, enum pipe pipe);
 void igt_assert_output_bpc_equal(int drmfd, enum pipe pipe,
-- 
2.25.1