[i-g-t V3 4/4] lib/igt_kms: Reset spurious hpd to default on exit

[Bhanuprakash Modem <bhanuprakash.modem@intel.com>]

Add support to force the spurious hpd to default on exit.

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com>
---
 lib/igt_kms.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index f88c7d6c0..275589f70 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -2922,6 +2922,19 @@ static void igt_handle_spurious_hpd(igt_display_t *display)
 	dump_connector_attrs();
 }
 
+static void igt_reset_spurious_hpd(int drm_fd)
+{
+	/* Proceed with spurious HPD handling only if the env var is set */
+	if (!getenv("IGT_KMS_IGNORE_HPD"))
+		return;
+
+	/* Set the ignore HPD for the driver */
+	if (!igt_ignore_long_hpd(drm_fd, false)) {
+		igt_info("Unable set the ignore HPD debugfs entry \n");
+		return;
+	}
+}
+
 /**
  * igt_display_reset_outputs:
  * @display: a pointer to an initialized #igt_display_t structure
@@ -3438,6 +3451,10 @@ void igt_display_fini(igt_display_t *display)
 
 	for (i = 0; i < display->n_outputs; i++)
 		igt_output_fini(&display->outputs[i]);
+
+	if (display->n_pipes && display->n_outputs)
+		igt_reset_spurious_hpd(display->drm_fd);
+
 	free(display->outputs);
 	display->outputs = NULL;
 	free(display->pipes);
-- 
2.43.0