drm/i915/selftest: Add more poison patterns

Throw in the inverse patterns to create more examples of poison to use
against the LRC state.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200313102812.30173-1-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gt/selftest_lrc.c b/drivers/gpu/drm/i915/gt/selftest_lrc.c
index e9e71c5..6f06ba7 100644 (file)
--- a/drivers/gpu/drm/i915/gt/selftest_lrc.c
+++ b/drivers/gpu/drm/i915/gt/selftest_lrc.c
@@ -5290,8 +5290,9 @@ static int live_lrc_isolation(void *arg)
        const u32 poison[] = {
                STACK_MAGIC,
                0x3a3a3a3a,
-               0xc5c5c5c5,
+               0x5c5c5c5c,
                0xffffffff,
+               0xffff0000,
        };
 
        /*
@@ -5317,6 +5318,10 @@ static int live_lrc_isolation(void *arg)
                                err = __lrc_isolation(engine, poison[i]);
                                if (err)
                                        break;
+
+                               err = __lrc_isolation(engine, ~poison[i]);
+                               if (err)
+                                       break;
                        }
                }
                intel_engine_pm_put(engine);