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);