[Intel-gfx] [PATCH i-g-t v2] tests/kms_atomic_allow_modeset: Add DRM_MODE_ATOMIC_ALLOW_MODESET test

[Mika Kahola]

When doing a full atomic modeset, kernel should fail if the flag
DRM_MODE_ATOMIC_ALLOW_MODESET is not set. Let's add this test as part of
Intel-GPU-Tools. The test procedure is the following:

- Try to do atomic commit without DRM_MODE_ATOMIC_ALLOW_MODESET flag.
  Kernel should reject this request.
- Do full modeset
- Enable DRM_MODE_ATOMIC_ALLOW_MODESET and try to do atmic commit.
  Kernel should now allow atomic modeset.

For: VIZ-6955

Signed-off-by: Mika Kahola <mika.kahola at intel.com>
---
 tests/Makefile.sources           |   1 +
 tests/kms_atomic_allow_modeset.c | 133 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 134 insertions(+)
 create mode 100644 tests/kms_atomic_allow_modeset.c

diff --git a/tests/Makefile.sources b/tests/Makefile.sources
index 45c21a0..d3ee629 100644
--- a/tests/Makefile.sources
+++ b/tests/Makefile.sources
@@ -94,6 +94,7 @@ TESTS_progs_M = \
 	kms_addfb_basic \
 	kms_atomic \
 	kms_atomic_transition \
+	kms_atomic_allow_modeset \
 	kms_busy \
 	kms_ccs \
 	kms_chv_cursor_fail \
diff --git a/tests/kms_atomic_allow_modeset.c b/tests/kms_atomic_allow_modeset.c
new file mode 100644
index 0000000..b4d8c16
--- /dev/null
+++ b/tests/kms_atomic_allow_modeset.c
@@ -0,0 +1,133 @@
+/*
+ * Copyright © 2017 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ */
+
+#include "igt.h"
+
+IGT_TEST_DESCRIPTION("Test that kernel rejects atomic modeset if ALLOW_MODESET flag is not set");
+
+static void
+test_init(igt_display_t *display, struct igt_fb *fb, igt_output_t *output)
+{
+	drmModeModeInfo *mode;
+	igt_plane_t *primary;
+	int id;
+
+	mode = igt_output_get_mode(output);
+
+	id = igt_create_pattern_fb(display->drm_fd,
+				   mode->hdisplay, mode->vdisplay,
+				   DRM_FORMAT_XRGB8888,
+				   LOCAL_I915_FORMAT_MOD_X_TILED,
+				   fb);
+	igt_assert(id);
+
+	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+	igt_plane_set_fb(primary, fb);
+}
+
+static void
+test_finish(igt_display_t *display, struct igt_fb *fb, igt_output_t *output)
+{
+	igt_plane_t *primary;
+
+	primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+
+	igt_remove_fb(display->drm_fd, fb);
+
+	igt_plane_set_fb(primary, NULL);
+	igt_output_set_pipe(output, PIPE_ANY);
+
+	igt_display_commit2(display, COMMIT_ATOMIC);
+}
+
+static void
+test_allow_modeset(igt_display_t *display, enum pipe pipe, igt_output_t *output)
+{
+	struct igt_fb fb;
+	int flags = DRM_MODE_ATOMIC_NONBLOCK;
+	int ret;
+
+	igt_output_set_pipe(output, pipe);
+
+	test_init(display, &fb, output);
+
+	/*
+	 * Try to do atomic commit without DRM_MODE_ATOMIC_ALLOW_MODESET flag.
+	 * Kernel should reject this request.
+	 */
+	ret = igt_display_try_commit_atomic(display, flags, NULL);
+	igt_assert_eq(ret, -EINVAL);
+
+	/* do modeset */
+	igt_output_set_pipe(output, pipe);
+
+	/*
+	 * Try to do atomic commit with DRM_MODE_ATOMIC_ALLOW_MODESET flag set.
+	 * The kernel should now accept this request.
+	 */
+	flags |= DRM_MODE_ATOMIC_ALLOW_MODESET;
+	ret = igt_display_try_commit_atomic(display, flags, NULL);
+	igt_assert_eq(ret, 0);
+
+	test_finish(display, &fb, output);
+}
+
+igt_simple_main
+{
+	igt_output_t *output;
+	igt_display_t display;
+	drmModeResPtr res;
+	enum pipe pipe;
+
+	igt_skip_on_simulation();
+
+	igt_fixture {
+		int valid_outputs = 0;
+
+		display.drm_fd = drm_open_driver_master(DRIVER_ANY);
+		igt_enable_connectors();
+		kmstest_set_vt_graphics_mode();
+		igt_display_init(&display, display.drm_fd);
+		igt_require(display.is_atomic);
+
+		for_each_pipe_with_valid_output(&display, pipe, output)
+			valid_outputs++;
+
+		igt_require_f(valid_outputs, "no valid crtc/connector combinations found\n");
+	}
+
+	res = drmModeGetResources(display.drm_fd);
+	kmstest_unset_all_crtcs(display.drm_fd, res);
+
+	for_each_pipe_with_valid_output(&display, pipe, output)
+		test_allow_modeset(&display, pipe, output);
+
+	igt_fixture {
+		igt_display_fini(&display);
+		igt_reset_connectors();
+		drmModeFreeResources(res);
+	}
+
+	igt_exit();
+}
-- 
2.7.4