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drm/i915: Hold RPM wakelock while initializing OA buffer

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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 <[email protected]>
Signed-off-by: Sagar Arun Kamble <[email protected]>
Reviewed-by: Lionel Landwerlin <[email protected]>
Signed-off-by: Maarten Lankhorst <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Fixes: d79651522e ("drm/i915: Enable i915 perf stream for Haswell OA unit")
Cc: <[email protected]> # v4.11+
(cherry picked from commit 987f8c444a)
Signed-off-by: Jani Nikula <[email protected]>
This commit is contained in:
[email protected] 2017-06-27 23:09:41 +05:30 • committed by Jani Nikula
commit 04941829b0
1 changed files with 6 additions and 6 deletions
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12
drivers/gpu/drm/i915/i915_perf.c
View file

@ -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);