Hi Greg,
Something must have gone wrong with this patch.
Surprisingly it seem to be in 4.13 :
commit 04941829b0049d2446c7042ab9686dd057d809a6
Author: sagar.a.kamble@xxxxxxxxx <sagar.a.kamble@xxxxxxxxx>
Date: Tue Jun 27 23:09:41 2017 +0530
drm/i915: Hold RPM wakelock while initializing OA buffer
Cheers,
-
Lionel
On 20/09/17 10:16, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 4.13-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 987f8c444aa2c33d98e7030d0c5f0a5325cc84ea Mon Sep 17 00:00:00 2001
From: "sagar.a.kamble@xxxxxxxxx" <sagar.a.kamble@xxxxxxxxx>
Date: Tue, 27 Jun 2017 23:09:41 +0530
Subject: [PATCH] drm/i915: Hold RPM wakelock while initializing OA buffer
OA buffer initialization involves access to HW registers to set
the OA base, head and tail. Ensure device is awake while setting
these. With this, all oa.ops are covered under RPM and forcewake
wakelock.
Cc: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@xxxxxxxxx>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/1498585181-23048-1-git-send-email-sagar.a.kamble@xxxxxxxxx
Fixes: d79651522e89c ("drm/i915: Enable i915 perf stream for Haswell OA unit")
Cc: <stable@xxxxxxxxxxxxxxx> # v4.11+
diff --git a/drivers/gpu/drm/i915/i915_perf.c b/drivers/gpu/drm/i915/i915_perf.c
index afd8260cd096..d9f77a4d85db 100644
--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -2067,10 +2067,6 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
return ret;
}
- ret = alloc_oa_buffer(dev_priv);
- if (ret)
- goto err_oa_buf_alloc;
-
/* PRM - observability performance counters:
*
* OACONTROL, performance counter enable, note:
@@ -2086,6 +2082,10 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
intel_runtime_pm_get(dev_priv);
intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+ ret = alloc_oa_buffer(dev_priv);
+ if (ret)
+ goto err_oa_buf_alloc;
+
ret = dev_priv->perf.oa.ops.enable_metric_set(dev_priv);
if (ret)
goto err_enable;
@@ -2097,11 +2097,11 @@ static int i915_oa_stream_init(struct i915_perf_stream *stream,
return 0;
err_enable:
- intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
- intel_runtime_pm_put(dev_priv);
free_oa_buffer(dev_priv);
err_oa_buf_alloc:
+ intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+ intel_runtime_pm_put(dev_priv);
if (stream->ctx)
oa_put_render_ctx_id(stream);