[PATCH i-g-t] tests/intel/kms_frontbuffer_tracking: Refine FBC test conditions for BMG variants

[Mohammed Thasleem]

This update stops skipping fbc-* tests based on the BMG platform.
Instead, tests are excluded only for specific unsupported BMG variants.

Signed-off-by: Mohammed Thasleem <mohammed.thasleem at intel.com>
---
 lib/igt_kms.c                          | 30 ++++++++++++++++++++++++++
 lib/igt_kms.h                          |  1 +
 tests/intel/kms_frontbuffer_tracking.c |  7 +++---
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index f3bc481f2..668da5915 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -61,6 +61,7 @@
 #include "igt_device.h"
 #include "igt_sysfs.h"
 #include "sw_sync.h"
+#include "xe/xe_query.h"
 #ifdef HAVE_CHAMELIUM
 #include "igt_chamelium.h"
 #endif
@@ -7442,3 +7443,32 @@ int igt_backlight_write(int value, const char *fname, igt_backlight_context_t *c
 
 	return 0;
 }
+
+/**
+ * igt_read_debugfs_wa:
+ * @drm_fd:	A drm file descriptor
+ * @check_wa:	Wa to be checked
+ */
+bool igt_read_debugfs_wa(int drm_fd, const char *check_wa)
+{
+	char buf[4096];
+	bool found = false;
+	char name[PATH_MAX];
+	unsigned int xe, debugfs_fd;
+
+	debugfs_fd = igt_debugfs_dir(drm_fd);
+
+	xe_for_each_gt(drm_fd, xe) {
+		sprintf(name, "gt%d/workarounds", xe);
+		igt_require(igt_debugfs_exists(drm_fd, name, O_RDONLY));
+
+		if (igt_debugfs_simple_read(debugfs_fd, name, buf, sizeof(buf)) > 0) {
+			if (strstr(buf, check_wa)) {
+				found = true;
+				break;
+			}
+		}
+	}
+
+	return found;
+}
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 0381c82ad..cd83a56e7 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -1279,5 +1279,6 @@ void igt_set_link_params(int drm_fd, igt_output_t *output,
 			   char *link_rate, char *lane_count);
 int igt_backlight_read(int *result, const char *fname, igt_backlight_context_t *context);
 int igt_backlight_write(int value, const char *fname, igt_backlight_context_t *context);
+bool igt_read_debugfs_wa(int drm_fd, const char *check_wa);
 
 #endif /* __IGT_KMS_H__ */
diff --git a/tests/intel/kms_frontbuffer_tracking.c b/tests/intel/kms_frontbuffer_tracking.c
index 0809352cb..56d6c6f74 100644
--- a/tests/intel/kms_frontbuffer_tracking.c
+++ b/tests/intel/kms_frontbuffer_tracking.c
@@ -781,6 +781,7 @@
  */
 
 #define TIME SLOW_QUICK(1000, 10000)
+#define CHECK_WA "16023588340"
 
 IGT_TEST_DESCRIPTION("Test the Kernel's frontbuffer tracking mechanism and "
 		     "its related features: FBC, PSR and DRRS");
@@ -2610,7 +2611,7 @@ static void prepare_subtest_data(const struct test_mode *t,
 static void prepare_subtest_screens(const struct test_mode *t)
 {
 	/* FBC disabled: Wa_16023588340 */
-	igt_skip_on_f((IS_BATTLEMAGE(drm.devid) && t->feature == FEATURE_FBC),
+	igt_skip_on_f((igt_read_debugfs_wa(drm.fd, CHECK_WA) && t->feature == FEATURE_FBC),
 		      "FBC isn't supported on BMG\n");
 
 	if (t->pipes == PIPE_DUAL)
@@ -2658,7 +2659,7 @@ static void prepare_subtest(const struct test_mode *t,
 static void rte_subtest(const struct test_mode *t)
 {
 	/* FBC disabled: Wa_16023588340 */
-	igt_skip_on_f((IS_BATTLEMAGE(drm.devid) && t->feature == FEATURE_FBC),
+	igt_skip_on_f((igt_read_debugfs_wa(drm.fd, CHECK_WA) && t->feature == FEATURE_FBC),
 		      "FBC isn't supported on BMG\n");
 
 	prepare_subtest_data(t, NULL);
@@ -4157,7 +4158,7 @@ igt_main_args("", long_options, help_str, opt_handler, NULL)
 			t.tiling = opt.tiling;
 
 			/* FBC disabled: Wa_16023588340 */
-			igt_skip_on_f((IS_BATTLEMAGE(drm.devid) && t.feature == FEATURE_FBC),
+			igt_skip_on_f((igt_read_debugfs_wa(drm.fd, CHECK_WA) && t.feature == FEATURE_FBC),
 				      "FBC isn't supported on BMG\n");
 
 			for_each_pipe(&drm.display, pipe) {
-- 
2.34.1