> -----Original Message-----
> From: Tangudu, Tilak <[email protected]>
> Sent: Tuesday, June 21, 2022 6:05 PM
> To: [email protected]; Ewins, Jon <[email protected]>; Vivi,
> Rodrigo <[email protected]>; Belgaumkar, Vinay
> <[email protected]>; Wilson, Chris P <[email protected]>;
> Dixit, Ashutosh <[email protected]>; Nilawar, Badal
> <[email protected]>; Gupta, Anshuman <[email protected]>;
> Tangudu, Tilak <[email protected]>; Roper, Matthew D
> <[email protected]>; Gupta, saurabhg <[email protected]>;
> Iddamsetty, Aravind <[email protected]>; Sundaresan, Sujaritha
> <[email protected]>
> Subject: [PATCH 04/11] drm/i915: Added is_intel_rpm_allowed helper
>
> Added is_intel_rpm_allowed function to query the runtime_pm status and
> disllow during suspending and resuming.
This seems a hack,
Not sure if we have better way to handle it.
May be check this in intel_pm_runtime_{get,put} to keep entire code simple ?
>
> Signed-off-by: Tilak Tangudu <[email protected]>
> ---
> drivers/gpu/drm/i915/intel_runtime_pm.c | 15 +++++++++++++++
> drivers/gpu/drm/i915/intel_runtime_pm.h | 1 +
> 2 files changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c
> b/drivers/gpu/drm/i915/intel_runtime_pm.c
> index 6ed5786bcd29..3759a8596084 100644
> --- a/drivers/gpu/drm/i915/intel_runtime_pm.c
> +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c
> @@ -320,6 +320,21 @@ untrack_all_intel_runtime_pm_wakerefs(struct
> intel_runtime_pm *rpm) }
>
> #endif
> +static int intel_runtime_pm_status(struct intel_runtime_pm *rpm) {
> + return rpm->kdev->power.runtime_status; }
This is racy in principal, we need a kdev->power lock here.
Regards,
Anshuman Gupta.
> +
> +bool is_intel_rpm_allowed(struct intel_runtime_pm *rpm) {
> + int rpm_status;
> +
> + rpm_status = intel_runtime_pm_status(rpm);
> + if (rpm_status == RPM_RESUMING || rpm_status ==
> RPM_SUSPENDING)
> + return false;
> + else
> + return true;
> +}
>
> static void
> intel_runtime_pm_acquire(struct intel_runtime_pm *rpm, bool wakelock) diff --
> git a/drivers/gpu/drm/i915/intel_runtime_pm.h
> b/drivers/gpu/drm/i915/intel_runtime_pm.h
> index d9160e3ff4af..99418c3a934a 100644
> --- a/drivers/gpu/drm/i915/intel_runtime_pm.h
> +++ b/drivers/gpu/drm/i915/intel_runtime_pm.h
> @@ -173,6 +173,7 @@ void intel_runtime_pm_init_early(struct
> intel_runtime_pm *rpm); void intel_runtime_pm_enable(struct
> intel_runtime_pm *rpm); void intel_runtime_pm_disable(struct
> intel_runtime_pm *rpm); void intel_runtime_pm_driver_release(struct
> intel_runtime_pm *rpm);
> +bool is_intel_rpm_allowed(struct intel_runtime_pm *rpm);
>
> intel_wakeref_t intel_runtime_pm_get(struct intel_runtime_pm *rpm);
> intel_wakeref_t intel_runtime_pm_get_if_in_use(struct intel_runtime_pm
> *rpm);
> --
> 2.25.1
