[PATCH i-g-t] tests/kms_bw: Restrict linear-tiling subtest to HDMI outputs and improve skip logic

[Pranay Samala]

This patch updates the linear-tiling subtest in kms_bw to only use HDMI
connector. If the platform does not have enough HDMI outputs to match the
number of requested pipes, the test is skipped with a clear message
indicating the requirement and the number of HDMI outputs found.

This avoids attempting to force modes on non-HDMI connectors and makes 
the test results clearer and more reliable on systems that don’t have 
enough HDMI connectivity.

Signed-off-by: Pranay Samala <pranay.samala at intel.com>
---
 tests/kms_bw.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/tests/kms_bw.c b/tests/kms_bw.c
index ca05695d3..042edf32f 100644
--- a/tests/kms_bw.c
+++ b/tests/kms_bw.c
@@ -194,7 +194,7 @@ static void run_test_linear_tiling(data_t *data, int pipe, const drmModeModeInfo
 	igt_crc_t zero, captured[IGT_MAX_PIPES];
 	int i = 0, num_pipes = 0;
 	enum pipe p;
-	int ret;
+	int ret, hdmi_count = 0;
 
 	/* Cannot use igt_display_get_n_pipes() due to fused pipes on i915 where they do
 	 * not give the numver of valid crtcs and always return IGT_MAX_PIPES */
@@ -215,6 +215,13 @@ static void run_test_linear_tiling(data_t *data, int pipe, const drmModeModeInfo
 			continue;
 		}
 
+		if (!physical &&
+		    output->config.connector->connector_type != DRM_MODE_CONNECTOR_HDMIA &&
+		    output->config.connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)
+			continue;
+
+		hdmi_count++;
+
 		force_output_mode(data, output, mode);
 
 		igt_create_color_fb(display->drm_fd, mode->hdisplay,
@@ -229,6 +236,10 @@ static void run_test_linear_tiling(data_t *data, int pipe, const drmModeModeInfo
 			 kmstest_pipe_name(i), igt_output_name(output), mode->name);
 	}
 
+	if (!physical && hdmi_count < (pipe + 1))
+		igt_skip("Skipping test: required %d HDMI outputs, but only found %d HDMI "
+			 "outputs to force mode\n", pipe + 1, hdmi_count);
+
 	ret = igt_display_try_commit_atomic(display,
 					    DRM_MODE_ATOMIC_ALLOW_MODESET |
 					    DRM_MODE_ATOMIC_TEST_ONLY,
-- 
2.34.1