[i-g-t] tests/kms_hdr: Skip if current & requested BPC doesn't match

[Bhanuprakash Modem]

Due to the limitaion of port clock values supported for HDMI, i915
may downgrade the requested bpc for a given mode.

This patch will skip the subtest if the requested bpc doesn't match
with crtc's current bpc.

Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem at intel.com>
---
 tests/kms_hdr.c | 43 +++++++++++++++++++++++++++++++++++++------
 1 file changed, 37 insertions(+), 6 deletions(-)

diff --git a/tests/kms_hdr.c b/tests/kms_hdr.c
index fb2e0790..6ad03aa0 100644
--- a/tests/kms_hdr.c
+++ b/tests/kms_hdr.c
@@ -144,8 +144,6 @@ static void test_bpc_switch_on_output(data_t *data, enum pipe pipe,
 	igt_fb_t afb;
 	int afb_id, ret;

-	prepare_test(data, output, pipe);
-
 	/* 10-bit formats are slow, so limit the size. */
 	afb_id = igt_create_fb(data->fd, 512, 512, DRM_FORMAT_XRGB2101010, 0, &afb);
 	igt_assert(afb_id);
@@ -206,6 +204,27 @@ static bool has_max_bpc(igt_output_t *output)
 	       igt_output_get_prop(output, IGT_CONNECTOR_MAX_BPC);
 }

+static bool i915_clock_constraint(data_t *data)
+{
+	drmModeConnector *connector = data->output->config.connector;
+
+	if (connector->connector_type != DRM_MODE_CONNECTOR_HDMIA &&
+	    connector->connector_type != DRM_MODE_CONNECTOR_HDMIB)
+		return true;
+
+	igt_output_set_prop_value(data->output, IGT_CONNECTOR_MAX_BPC, 10);
+	igt_display_commit_atomic(&data->display, DRM_MODE_ATOMIC_ALLOW_MODESET, NULL);
+
+	if (!igt_check_output_bpc_equal(data->fd, data->pipe_id,
+					data->output->name, 10)) {
+		test_fini(data);
+
+		return false;
+	}
+
+	return true;
+}
+
 static void test_bpc_switch(data_t *data, uint32_t flags)
 {
 	igt_display_t *display = &data->display;
@@ -217,8 +236,16 @@ static void test_bpc_switch(data_t *data, uint32_t flags)
 		if (!has_max_bpc(output))
 			continue;

+		if (igt_get_output_max_bpc(data->fd, output->name) < 10)
+			continue;
+
 		for_each_pipe(display, pipe) {
 			if (igt_pipe_connector_valid(pipe, output)) {
+				prepare_test(data, output, pipe);
+
+				if (is_i915_device(data->fd) && !i915_clock_constraint(data))
+					break;
+
 				igt_dynamic_f("pipe-%s-%s",
 					      kmstest_pipe_name(pipe), output->name)
 					test_bpc_switch_on_output(data, pipe, output, flags);
@@ -367,8 +394,6 @@ static void test_static_toggle(data_t *data, enum pipe pipe,
 	igt_fb_t afb;
 	int afb_id;

-	prepare_test(data, output, pipe);
-
 	/* 10-bit formats are slow, so limit the size. */
 	afb_id = igt_create_fb(data->fd, 512, 512, DRM_FORMAT_XRGB2101010, 0, &afb);
 	igt_assert(afb_id);
@@ -446,8 +471,6 @@ static void test_static_swap(data_t *data, enum pipe pipe, igt_output_t *output)
 	int afb_id;
 	struct hdr_output_metadata hdr;

-	prepare_test(data, output, pipe);
-
 	/* 10-bit formats are slow, so limit the size. */
 	afb_id = igt_create_fb(data->fd, 512, 512, DRM_FORMAT_XRGB2101010, 0, &afb);
 	igt_assert(afb_id);
@@ -532,8 +555,16 @@ static void test_hdr(data_t *data, uint32_t flags)
 		if (!is_panel_hdr(data, output))
 			continue;

+		if (igt_get_output_max_bpc(data->fd, output->name) < 10)
+			continue;
+
 		for_each_pipe(display, pipe) {
 			if (igt_pipe_connector_valid(pipe, output)) {
+				prepare_test(data, output, pipe);
+
+				if (is_i915_device(data->fd) && !i915_clock_constraint(data))
+					break;
+
 				igt_dynamic_f("pipe-%s-%s",
 					      kmstest_pipe_name(pipe), output->name) {
 					if (flags & TEST_NONE || flags & TEST_DPMS || flags & TEST_SUSPEND)
--
2.35.1