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SubjectRe: [PATCH v4 2/3] drm/i915: Move on the new pm runtime interface
On Thu, 20 Dec 2018 at 15:17, Vincent Guittot
<vincent.guittot@linaro.org> wrote:
>
> Use the new pm runtime interface to get the accounted suspended time:
> pm_runtime_accounted_time_get()

pm_runtime_suspended_time()

This change also makes quite some nice cleanups to the code, which is
mostly because of converting to the new runtime PM API. I think the
changelog deserves to state that, in some simple way.

>
> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>

Other than the minor things above:

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>

Kind regards
Uffe


> ---
> drivers/gpu/drm/i915/i915_pmu.c | 16 ++++++----------
> drivers/gpu/drm/i915/i915_pmu.h | 4 ++--
> 2 files changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
> index d6c8f8f..3f76f60 100644
> --- a/drivers/gpu/drm/i915/i915_pmu.c
> +++ b/drivers/gpu/drm/i915/i915_pmu.c
> @@ -5,6 +5,7 @@
> */
>
> #include <linux/irq.h>
> +#include <linux/pm_runtime.h>
> #include "i915_pmu.h"
> #include "intel_ringbuffer.h"
> #include "i915_drv.h"
> @@ -478,7 +479,6 @@ static u64 get_rc6(struct drm_i915_private *i915)
> * counter value.
> */
> spin_lock_irqsave(&i915->pmu.lock, flags);
> - spin_lock(&kdev->power.lock);
>
> /*
> * After the above branch intel_runtime_pm_get_if_in_use failed
> @@ -491,16 +491,13 @@ static u64 get_rc6(struct drm_i915_private *i915)
> * suspended and if not we cannot do better than report the last
> * known RC6 value.
> */
> - if (kdev->power.runtime_status == RPM_SUSPENDED) {
> - if (!i915->pmu.sample[__I915_SAMPLE_RC6_ESTIMATED].cur)
> - i915->pmu.suspended_jiffies_last =
> - kdev->power.suspended_jiffies;
> + if (pm_runtime_status_suspended(kdev)) {
> + val = pm_runtime_suspended_time(kdev);
>
> - val = kdev->power.suspended_jiffies -
> - i915->pmu.suspended_jiffies_last;
> - val += jiffies - kdev->power.accounting_timestamp;
> + if (!i915->pmu.sample[__I915_SAMPLE_RC6_ESTIMATED].cur)
> + i915->pmu.suspended_time_last = val;
>
> - val = jiffies_to_nsecs(val);
> + val -= i915->pmu.suspended_time_last;
> val += i915->pmu.sample[__I915_SAMPLE_RC6].cur;
>
> i915->pmu.sample[__I915_SAMPLE_RC6_ESTIMATED].cur = val;
> @@ -510,7 +507,6 @@ static u64 get_rc6(struct drm_i915_private *i915)
> val = i915->pmu.sample[__I915_SAMPLE_RC6].cur;
> }
>
> - spin_unlock(&kdev->power.lock);
> spin_unlock_irqrestore(&i915->pmu.lock, flags);
> }
>
> diff --git a/drivers/gpu/drm/i915/i915_pmu.h b/drivers/gpu/drm/i915/i915_pmu.h
> index 7f164ca..3dc2a30 100644
> --- a/drivers/gpu/drm/i915/i915_pmu.h
> +++ b/drivers/gpu/drm/i915/i915_pmu.h
> @@ -95,9 +95,9 @@ struct i915_pmu {
> */
> struct i915_pmu_sample sample[__I915_NUM_PMU_SAMPLERS];
> /**
> - * @suspended_jiffies_last: Cached suspend time from PM core.
> + * @suspended_time_last: Cached suspend time from PM core.
> */
> - unsigned long suspended_jiffies_last;
> + u64 suspended_time_last;
> /**
> * @i915_attr: Memory block holding device attributes.
> */
> --
> 2.7.4
>

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