[PATCH i-g-t 3/3] tests/intel/kms_joiner: Add a new test to validate non-joiner mode

[Jeevan B <jeevan.b@intel.com>]

We need to ensure that the system does not enable a joiner for modes
that do not require it. This test runs on all pipes and validates
that the highest available resolution and refresh rate within the
max dot clock limit is selected. The test then forces a modeset and
flip on the given pipe and checks the status using the joiner check.
If the joiner is mistakenly enabled for a non-joiner mode, the test
should fail.

v2: Fix nonjoiner_mode_found to find the required case.
    Remove clk sort and minor fixes.
v3: Rename nonjoiner to non_joiner and minor modifications.
v4: Add joiner check.
v5: Rename test name and function name, Update test description,
    update non_joiner_mode_found logic.
v6: Update commit message and rename test, function name.

Signed-off-by: Jeevan B <jeevan.b@intel.com>
---
 tests/intel/kms_joiner.c | 58 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/tests/intel/kms_joiner.c b/tests/intel/kms_joiner.c
index 086cfeb71..7b8cc87a7 100644
--- a/tests/intel/kms_joiner.c
+++ b/tests/intel/kms_joiner.c
@@ -74,6 +74,10 @@
  *
  * SUBTEST: switch-modeset-ultra-joiner-big-joiner
  * Description: Verify switching between ultra joiner and big joiner modeset.
+ *
+ * SUBTEST: basic-max-non-joiner
+ * Description: Validate non-joiner mode functionality by enabling corner-case display modes
+ *		that vary across different platforms.
  */
 IGT_TEST_DESCRIPTION("Test joiner / force joiner");
 
@@ -85,6 +89,7 @@ typedef struct {
 	int ultra_joiner_output_count;
 	int non_big_joiner_output_count;
 	int non_ultra_joiner_output_count;
+	int non_joiner_output_count;
 	int mixed_output_count;
 	int output_count;
 	int n_pipes;
@@ -94,6 +99,7 @@ typedef struct {
 	igt_output_t *non_big_joiner_output[IGT_MAX_PIPES];
 	igt_output_t *non_ultra_joiner_output[IGT_MAX_PIPES];
 	igt_output_t *mixed_output[IGT_MAX_PIPES];
+	igt_output_t *non_joiner_output[IGT_MAX_PIPES];
 	enum pipe pipe_seq[IGT_MAX_PIPES];
 	igt_display_t display;
 } data_t;
@@ -491,6 +497,42 @@ static void test_ultra_joiner(data_t *data, bool invalid_pipe, bool two_display,
 	}
 }
 
+static void test_basic_max_non_joiner(data_t *data)
+{
+	int count;
+	enum pipe pipe;
+	igt_output_t **outputs, *output;
+	igt_fb_t fb;
+	igt_plane_t *primary;
+	drmModeModeInfo *mode;
+
+	count = data->non_joiner_output_count;
+	outputs = data->non_joiner_output;
+	igt_display_reset(&data->display);
+
+	for (int i = 0; i < count; i++) {
+		output = outputs[i];
+		mode = igt_output_get_mode(output);
+		for (pipe = 0; pipe < data->n_pipes - 1; pipe++) {
+			igt_dynamic_f("pipe-%s-%s", kmstest_pipe_name(pipe), output->name) {
+				igt_output_set_pipe(output, pipe);
+				primary = igt_output_get_plane_type(output, DRM_PLANE_TYPE_PRIMARY);
+				igt_create_pattern_fb(data->drm_fd, mode->hdisplay, mode->vdisplay,
+						      DRM_FORMAT_XRGB8888,
+						      DRM_FORMAT_MOD_LINEAR, &fb);
+				igt_plane_set_fb(primary, &fb);
+				igt_display_commit2(&data->display, COMMIT_ATOMIC);
+				igt_assert_f(!igt_is_joiner_enabled_for_pipe(data->drm_fd, pipe),
+					     "Joiner enabled on pipe %c", 'A' + pipe);
+
+				igt_display_reset(&data->display);
+				igt_plane_set_fb(primary, NULL);
+				igt_remove_fb(data->drm_fd, &fb);
+			}
+		}
+	}
+}
+
 igt_main
 {
 	bool ultra_joiner_supported, is_dgfx;
@@ -505,6 +547,7 @@ igt_main
 		data.ultra_joiner_output_count = 0;
 		data.non_big_joiner_output_count = 0;
 		data.non_ultra_joiner_output_count = 0;
+		data.non_joiner_output_count = 0;
 		data.mixed_output_count = 0;
 		data.output_count = 0;
 		j = 0;
@@ -523,6 +566,7 @@ igt_main
 
 		for_each_connected_output(&data.display, output) {
 			bool ultrajoiner_found = false, bigjoiner_found = false, force_joiner_supported = false;
+			bool non_joiner_found = false;
 			drmModeConnector *connector = output->config.connector;
 
 			/*
@@ -533,6 +577,7 @@ igt_main
 			 */
 			bigjoiner_found = bigjoiner_mode_found(data.drm_fd, connector, max_dotclock, &mode);
 			ultrajoiner_found = ultrajoiner_mode_found(data.drm_fd, connector, max_dotclock, &mode);
+			non_joiner_found = non_joiner_mode_found(data.drm_fd, connector, max_dotclock, &mode);
 
 			if (igt_has_force_joiner_debugfs(data.drm_fd, output->name))
 				force_joiner_supported = true;
@@ -548,6 +593,9 @@ igt_main
 			else if (force_joiner_supported)
 				data.non_big_joiner_output[data.non_big_joiner_output_count++] = output;
 
+			if (non_joiner_found)
+				data.non_joiner_output[data.non_joiner_output_count++] = output;
+
 			data.output_count++;
 		}
 		if (data.big_joiner_output_count == 1 && data.non_big_joiner_output_count >= 1) {
@@ -713,6 +761,16 @@ igt_main
 		}
 	}
 
+	igt_describe("Verify the basic modeset on the maximum non-joiner mode across "
+		     "all pipes");
+	igt_subtest_with_dynamic("basic-max-non-joiner") {
+		igt_require_f(data.n_pipes >= 1,
+			      "At least one pipe is required.\n");
+		igt_require_f(data.non_joiner_output_count  > 0,
+			      "No suitable non-joiner mode found\n");
+			test_basic_max_non_joiner(&data);
+	}
+
 	igt_fixture {
 		igt_display_fini(&data.display);
 		drm_close_driver(data.drm_fd);
-- 
2.25.1