On 05.04.2018 11:49, Enric Balletbo i Serra wrote:
> From: Tomasz Figa <tfiga@xxxxxxxxxxxx>
>
> If we change the state first and reschedule later, we might have the
> work executed according to previous scheduled time and end up with PSR
> re-enabled instantly. Let's cancel the work before changing the state.
>
> While at it, consolidate psr_disable_handler() to just call
> rockchip_drm_do_flush(), as they are both supposed to do the same.
>
> Signed-off-by: Tomasz Figa <tfiga@xxxxxxxxxxxx>
> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
> Tested-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
> ---
>
> drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 20 ++++++++------------
> 1 file changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> index a107845ba97c..c8655e625ba2 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> @@ -138,18 +138,6 @@ static void psr_flush_handler(struct work_struct *work)
> mutex_unlock(&psr->lock);
> }
>
> -static void psr_disable_handler(struct work_struct *work)
> -{
> - struct psr_drv *psr = container_of(work, struct psr_drv, disable_work);
> -
> - /* If the state has changed since we initiated the flush, do nothing */
> - mutex_lock(&psr->lock);
> - if (psr->state == PSR_ENABLE)
> - psr_set_state_locked(psr, PSR_FLUSH);
> - mutex_unlock(&psr->lock);
> - mod_delayed_work(system_wq, &psr->flush_work, PSR_FLUSH_TIMEOUT_MS);
> -}
> -
> /**
> * rockchip_drm_psr_activate - activate PSR on the given pipe
> * @encoder: encoder to obtain the PSR encoder
> @@ -198,6 +186,7 @@ EXPORT_SYMBOL(rockchip_drm_psr_deactivate);
>
> static void rockchip_drm_do_flush(struct psr_drv *psr)
> {
> + cancel_delayed_work_sync(&psr->flush_work);
> psr_set_state(psr, PSR_FLUSH);
> mod_delayed_work(system_wq, &psr->flush_work, PSR_FLUSH_TIMEOUT_MS);
I guess you can change it to schedule_delayed_work then.
Anyway:
Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
--
Regards
Andrzej
> }
> @@ -244,6 +233,13 @@ void rockchip_drm_psr_flush_all(struct drm_device *dev)
> }
> EXPORT_SYMBOL(rockchip_drm_psr_flush_all);
>
> +static void psr_disable_handler(struct work_struct *work)
> +{
> + struct psr_drv *psr = container_of(work, struct psr_drv, disable_work);
> +
> + rockchip_drm_do_flush(psr);
> +}
> +
> static void psr_input_event(struct input_handle *handle,
> unsigned int type, unsigned int code,
> int value)
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