[igt-dev] [i-g-t] tests/kms_plane: skip memory demanding modes in test_plane_panning

[Andrzej Hajda]

test_plane_panning requires about 10 times bigger amount of memory than
memory required by framebuffer in default display mode. In case of some
configurations it can exceed available memory (4k modes on small-bar
systems), causing test aborts.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6824
Signed-off-by: Andrzej Hajda <andrzej.hajda at intel.com>
---
 tests/kms_plane.c | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/tests/kms_plane.c b/tests/kms_plane.c
index 8a54ba6645c..fc530d2cfd3 100644
--- a/tests/kms_plane.c
+++ b/tests/kms_plane.c
@@ -342,14 +342,14 @@ test_plane_panning_with_output(data_t *data,
 	drmModeModeInfo *mode;
 	igt_crc_t crc;
 
-	igt_info("Testing connector %s using pipe %s\n",
-		 igt_output_name(output), kmstest_pipe_name(pipe));
-
 	igt_output_set_pipe(output, pipe);
 
 	mode = igt_output_get_mode(output);
 	primary = igt_output_get_plane(output, 0);
 
+	igt_info("Testing connector %s using pipe %s, mode %s\n",
+		 igt_output_name(output), kmstest_pipe_name(pipe), mode->name);
+
 	create_fb_for_mode_panning(data, mode, &primary_fb);
 	igt_plane_set_fb(primary, &primary_fb);
 
@@ -381,6 +381,8 @@ test_plane_panning_with_output(data_t *data,
 static void
 test_plane_panning(data_t *data, enum pipe pipe)
 {
+	bool mode_found = false;
+	uint64_t mem_size = 0;
 	igt_output_t *output;
 	igt_crc_t ref_crc;
 
@@ -389,6 +391,26 @@ test_plane_panning(data_t *data, enum pipe pipe)
 
 	test_init(data, pipe);
 
+	for_each_memory_region(r, data->drm_fd)
+		if (r->ci.memory_class == I915_MEMORY_CLASS_DEVICE)
+			mem_size = r->cpu_size;
+
+	for_each_connector_mode(output) {
+		drmModeModeInfo *m = &output->config.connector->modes[j__];
+		uint32_t fb_size = m->hdisplay * m->vdisplay * 4;
+
+		/* test allocates 2 double-dim fbs, add one more, to be safe */
+		if (mem_size && 3 * 4 * fb_size > mem_size) {
+			igt_debug("Skipping mode %s due to low memory\n", m->name);
+			continue;
+		}
+
+		igt_output_override_mode(output, m);
+		mode_found = true;
+		break;
+	}
+	igt_require(mode_found);
+
 	if (data->flags & TEST_PANNING_TOP_LEFT)
 		test_grab_crc(data, output, pipe, &red, data->flags, &ref_crc);
 	else
-- 
2.34.1