[PATCH v3] i915/gt/selftests: Disable lrc_timestamp test

[Mikolaj Wasiak]

This test was designed to isolate a bug in tigerlake and dg2 hardware.
The bug was found and fixed in newer generations.
Since we won't support any new hardware with this driver, the test
should now be turned off in the CI to not pollute it with random failures
on previous hardware.

Fixes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13697

Signed-off-by: Mikolaj Wasiak <mikolaj.wasiak at intel.com>
Reviewed-by: Chris Wilson <chris.p.wilson at linux.intel.com>
---
v1 -> v2:
- Disabled the test instead of removing it,
- Changed name from 'remove' to 'disable'

v2 -> v3:
- Fix vocabulary
- Disable this test only on related hardware

 drivers/gpu/drm/i915/gt/selftest_lrc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index 22e750108c5f..c928b4723c38 100644
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -7,6 +7,7 @@
 
 #include "gem/i915_gem_internal.h"
 
+#include "i915_drv.h"
 #include "i915_selftest.h"
 #include "intel_engine_heartbeat.h"
 #include "intel_engine_pm.h"
@@ -858,6 +859,16 @@ static int live_lrc_timestamp(void *arg)
 		U32_MAX,
 	};
 
+	/*
+	 * This test was designed to isolate a hardware bug.
+	 * The bug was found and fixed in future generations but 
+	 * now the test pollutes our CI on previous generation.
+	 *
+	 * https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13697
+	 */
+	if (GRAPHICS_VER(gt->i915) == 12)
+		return 0;
+
 	/*
 	 * We want to verify that the timestamp is saved and restore across
 	 * context switches and is monotonic.
-- 
2.48.1