[igt-dev] [PATCH i-g-t v2] tests/kms_async_flips: Skip test when running with Intel's PSR2 selective fetch enabled

["José Roberto de Souza" <jose.souza@intel.com>]

Intel's PSR2 selective fetch adds other planes to state when
necessary, causing the async flip to fail because async flip is not
supported in cursor plane.

v2:
- adding a description to the skip message

Cc: Petri Latvala <petri.latvala@intel.com>
Cc: Karthik B S <karthik.b.s@intel.com>
Cc: Vandita Kulkarni <vandita.kulkarni@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Petri Latvala <petri.latvala@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
---
 lib/igt_psr.c           | 16 ++++++++++++++++
 lib/igt_psr.h           |  2 ++
 tests/kms_async_flips.c | 10 ++++++++++
 3 files changed, 28 insertions(+)

diff --git a/lib/igt_psr.c b/lib/igt_psr.c
index 857eb591c..8fa8b192f 100644
--- a/lib/igt_psr.c
+++ b/lib/igt_psr.c
@@ -21,6 +21,7 @@
  * IN THE SOFTWARE.
  */
 
+#include "drmtest.h"
 #include "igt_params.h"
 #include "igt_psr.h"
 #include "igt_sysfs.h"
@@ -264,3 +265,18 @@ void psr_print_debugfs(int debugfs_fd)
 
 	igt_info("%s", buf);
 }
+
+bool i915_psr2_selective_fetch_check(int drm_fd)
+{
+	int debugfs_fd;
+	bool ret;
+
+	if (!is_i915_device(drm_fd))
+		return false;
+
+	debugfs_fd = igt_debugfs_dir(drm_fd);
+	ret = psr2_selective_fetch_check(debugfs_fd);
+	close(debugfs_fd);
+
+	return ret;
+}
diff --git a/lib/igt_psr.h b/lib/igt_psr.h
index c47b197b1..a075f336d 100644
--- a/lib/igt_psr.h
+++ b/lib/igt_psr.h
@@ -47,4 +47,6 @@ bool psr_sink_support(int device, int debugfs_fd, enum psr_mode mode);
 bool psr2_wait_su(int debugfs_fd, uint16_t *num_su_blocks);
 void psr_print_debugfs(int debugfs_fd);
 
+bool i915_psr2_selective_fetch_check(int drm_fd);
+
 #endif
diff --git a/tests/kms_async_flips.c b/tests/kms_async_flips.c
index 4ff7a196a..0c3821339 100644
--- a/tests/kms_async_flips.c
+++ b/tests/kms_async_flips.c
@@ -27,6 +27,7 @@
 
 #include "igt.h"
 #include "igt_aux.h"
+#include "igt_psr.h"
 #include <sys/ioctl.h>
 #include <sys/time.h>
 #include <poll.h>
@@ -299,6 +300,15 @@ static void test_cursor(data_t *data)
 	struct igt_fb cursor_fb;
 	struct drm_mode_cursor cur;
 
+	/*
+	 * Intel's PSR2 selective fetch adds other planes to state when
+	 * necessary, causing the async flip to fail because async flip is not
+	 * supported in cursor plane.
+	 */
+	igt_skip_on_f(i915_psr2_selective_fetch_check(data->drm_fd),
+		      "PSR2 sel fetch causes cursor to be added to primary plane " \
+		      "pages flips and async flip is not supported in cursor\n");
+
 	do_or_die(drmGetCap(data->drm_fd, DRM_CAP_CURSOR_WIDTH, &width));
 	do_or_die(drmGetCap(data->drm_fd, DRM_CAP_CURSOR_WIDTH, &height));
 
-- 
2.33.1