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drm/panfrost: Handle HW_ISSUE_TTRX_3076

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Some Valhall GPUs require resets when encountering bus faults due to
occlusion query writes. Add the issue bit for this and handle it.

Reviewed-by: Steven Price <steven.price@arm.com>
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220525145754.25866-5-alyssa.rosenzweig@collabora.com
This commit is contained in:
Alyssa Rosenzweig 2022-05-25 10:57:49 -04:00
parent a17775a1af
commit 0c0af43834
2 changed files with 11 additions and 2 deletions
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9
drivers/gpu/drm/panfrost/panfrost_device.c
View File

@ -11,6 +11,7 @@
#include "panfrost_device.h"
#include "panfrost_devfreq.h"
#include "panfrost_features.h"
#include "panfrost_issues.h"
#include "panfrost_gpu.h"
#include "panfrost_job.h"
#include "panfrost_mmu.h"
@ -380,9 +381,13 @@ const char *panfrost_exception_name(u32 exception_code)
bool panfrost_exception_needs_reset(const struct panfrost_device *pfdev,
u32 exception_code)
{
/* Right now, none of the GPU we support need a reset, but this
* might change.
/* If an occlusion query write causes a bus fault on affected GPUs,
* future fragment jobs may hang. Reset to workaround.
*/
if (exception_code == DRM_PANFROST_EXCEPTION_JOB_BUS_FAULT)
return panfrost_has_hw_issue(pfdev, HW_ISSUE_TTRX_3076);
/* No other GPUs we support need a reset */
return false;
}

4
drivers/gpu/drm/panfrost/panfrost_issues.h
View File

@ -128,6 +128,10 @@ enum panfrost_hw_issue {
/* Must set SC_VAR_ALGORITHM */
HW_ISSUE_TTRX_2968_TTRX_3162,
/* Bus fault from occlusion query write may cause future fragment jobs
* to hang */
HW_ISSUE_TTRX_3076,
HW_ISSUE_END
};