[igt-dev] [PATCH i-g-t] lib/igt_kms: Add helper to turn on and off the displays

[Mohammed Thasleem <mohammed.thasleem@intel.com>]

This helper will turn on and off the displays with the help of
IGT_CRTC_ACTIVE properties set to ON and OFF.

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Signed-off-by: Mohammed Thasleem <mohammed.thasleem@intel.com>

v2: Use IGT_CRTC_ACTIVE for displays On/Off.
v3: -Update commit message and helper names.
    -Update display on and off helpers.
---
 lib/igt_kms.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/igt_kms.h |  3 +++
 2 files changed, 53 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index e0959ccff..f72a21a03 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -6039,3 +6039,53 @@ bool i915_pipe_output_combo_valid(igt_display_t *display)
 	 */
 	return igt_check_bigjoiner_support(display);
 }
+
+void igt_turn_on_display(int drm_fd)
+{
+	igt_display_t display;
+	igt_output_t *output;
+	enum pipe pipe;
+
+	if (!drmModeGetResources(drm_fd))
+		return;
+
+	igt_display_require(&display, drm_fd);
+	igt_display_reset(&display);
+
+	for_each_pipe(&display, pipe) {
+		for_each_valid_output_on_pipe(&display, pipe, output) {
+			if (output->pending_pipe != PIPE_NONE)
+				continue;
+
+			igt_output_set_pipe(output, pipe);
+			break;
+		}
+	}
+
+	igt_display_commit2(&display, COMMIT_ATOMIC);
+
+	igt_display_fini(&display);
+}
+
+void igt_turn_off_display(int drm_fd)
+{
+	igt_display_t display;
+	igt_output_t *output;
+	enum pipe pipe;
+
+	if (!drmModeGetResources(drm_fd))
+		return;
+
+	igt_display_require(&display, drm_fd);
+	igt_display_reset(&display);
+
+	for_each_connected_output(&display, output)
+		igt_output_set_pipe(output, PIPE_NONE);
+
+	for_each_pipe(&display, pipe)
+		igt_pipe_set_prop_value(&display, pipe, IGT_CRTC_ACTIVE, 0);
+
+	igt_display_commit2(&display, COMMIT_ATOMIC);
+
+	igt_display_fini(&display);
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 91355c910..3939f2714 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -1014,4 +1014,7 @@ bool igt_check_bigjoiner_support(igt_display_t *display);
 bool igt_parse_mode_string(const char *mode_string, drmModeModeInfo *mode);
 bool i915_pipe_output_combo_valid(igt_display_t *display);
 
+void igt_turn_on_display(int drm_fd);
+void igt_turn_off_display(int drm_fd);
+
 #endif /* __IGT_KMS_H__ */
-- 
2.25.1