[PATCH v2 5/9] drm/panfrost: Add HW_ISSUE_TTRX_3485 quirk

Alyssa Rosenzweig
2022-05-25T14:59:48Z

TTRX_3485 requires the infamous "dummy job" workaround. I have this
workaround implemented in a local branch, but I have not yet hit a case
that requires it so I cannot test whether the implementation is correct.
In the mean time, add the quirk bit so we can document which platforms
may need it in the future.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Steven Price <steven.price@arm.com>
---
drivers/gpu/drm/panfrost/panfrost_issues.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/panfrost/panfrost_issues.h b/drivers/gpu/drm/panfrost/panfrost_issues.h
index e35807e4b743..4d41e0a13867 100644
--- a/drivers/gpu/drm/panfrost/panfrost_issues.h
+++ b/drivers/gpu/drm/panfrost/panfrost_issues.h
@@ -132,6 +132,9 @@ enum panfrost_hw_issue {
* to hang */
HW_ISSUE_TTRX_3076,

+ /* Must issue a dummy job before starting real work to prevent hangs */
+ HW_ISSUE_TTRX_3485,
+
HW_ISSUE_END
};

--
2.35.1