drm/i915/tgl: Wa_1607138340

Avoid possible cs hang with semaphores by disabling
lite restore.

Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20191015154449.10338-11-mika.kuoppala@linux.intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index d64b4d868b7584398c1c80b4cf798f4a61bbbaf3..44f213fd7604509ca3106dc8f07c4e52d4602992 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -1048,6 +1048,10 @@ static u64 execlists_update_context(const struct i915_request *rq)
        desc = ce->lrc_desc;
        ce->lrc_desc &= ~CTX_DESC_FORCE_RESTORE;
 
+       /* Wa_1607138340:tgl */
+       if (IS_TGL_REVID(rq->i915, TGL_REVID_A0, TGL_REVID_A0))
+               desc |= CTX_DESC_FORCE_RESTORE;
+
        return desc;
 }