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SubjectRe: [PATCH 8/8] drm/arm/malidp: Added the late system pm functions
On Mon, Mar 26, 2018 at 06:03:20PM +0100, Ayan Kumar Halder wrote:
> malidp_pm_suspend_late checks if the runtime status is not suspended
> and if so, invokes malidp_runtime_pm_suspend which disables the
> display engine/core interrupts and the clocks. It sets the runtime status
> as suspended. Subsequently, malidp_pm_resume_early will invoke
> malidp_runtime_pm_resume which enables the clocks and the interrupts
> (previously disabled) and sets the runtime status as active.
>
> Signed-off-by: Ayan Kumar Halder <ayan.halder@arm.com>
> Change-Id: I5f8c3d28f076314a1c9da2a46760a9c37039ccda

Why exactly do you need late/early hooks? If you have dependencies with
other devices, pls consider adding device_links instead. This here
shouldn't be necessary.
-Daniel
> ---
> drivers/gpu/drm/arm/malidp_drv.c | 17 +++++++++++++++++
> 1 file changed, 17 insertions(+)
>
> diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
> index bd44a6d..f6124d8 100644
> --- a/drivers/gpu/drm/arm/malidp_drv.c
> +++ b/drivers/gpu/drm/arm/malidp_drv.c
> @@ -766,8 +766,25 @@ static int __maybe_unused malidp_pm_resume(struct device *dev)
> return 0;
> }
>
> +static int __maybe_unused malidp_pm_suspend_late(struct device *dev)
> +{
> + if (!pm_runtime_status_suspended(dev)) {
> + malidp_runtime_pm_suspend(dev);
> + pm_runtime_set_suspended(dev);
> + }
> + return 0;
> +}
> +
> +static int __maybe_unused malidp_pm_resume_early(struct device *dev)
> +{
> + malidp_runtime_pm_resume(dev);
> + pm_runtime_set_active(dev);
> + return 0;
> +}
> +
> static const struct dev_pm_ops malidp_pm_ops = {
> SET_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend, malidp_pm_resume) \
> + SET_LATE_SYSTEM_SLEEP_PM_OPS(malidp_pm_suspend_late, malidp_pm_resume_early) \
> SET_RUNTIME_PM_OPS(malidp_runtime_pm_suspend, malidp_runtime_pm_resume, NULL)
> };
>
> --
> 2.7.4
>
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

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