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SubjectRe: [PATCH 1/5] media: mediatek: vcodec: add params to record lat and core lat_buf count
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Hi Angelo,

Thanks for your suggestion.
On Tue, 2022-12-13 at 10:09 +0100, AngeloGioacchino Del Regno wrote:
> Il 10/12/22 08:32, Yunfei Dong ha scritto:
> > Using lat_buf to share decoder information between lat and core
> > work
> > queue, adding params to record the buf count.
> >
> > Fixes: 365e4ba01df4 ("media: mtk-vcodec: Add work queue for core
> > hardware decode")
> > Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
> > ---
> > .../platform/mediatek/vcodec/vdec_msg_queue.c | 32
> > ++++++++++++++++++-
> > .../platform/mediatek/vcodec/vdec_msg_queue.h | 9 ++++++
> > 2 files changed, 40 insertions(+), 1 deletion(-)
> >
> > diff --git
> > a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
> > b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
> > index dc2004790a47..af7ddba1923a 100644
> > --- a/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
> > +++ b/drivers/media/platform/mediatek/vcodec/vdec_msg_queue.c
> > @@ -52,6 +52,30 @@ static struct list_head *vdec_get_buf_list(int
> > hardware_index, struct vdec_lat_b
> > }
> > }
> >
> > +static void vdec_msg_queue_inc(struct vdec_msg_queue *msg_queue,
> > int hardware_index)
> > +{
> > + mutex_lock(&msg_queue->list_cnt_mutex);
>
> I doubt that you need to use this mutex, as you're using atomics...
>
Can be removed.
> > +
> > + if (hardware_index == MTK_VDEC_CORE)
> > + atomic_inc(&msg_queue->core_list_cnt);
> > + else
> > + atomic_inc(&msg_queue->lat_list_cnt);
> > +
>
> This branch (with the relevant appropriate changes) can be simplified
> as
>
> atomic_inc(&msg_queue->list_cnt[hardware_index]);
>
> ...where list_cnt is an array, and hardware_index is an enumeration.
>
Only use lat and core, no need to using a array for every hardware.

Best Regards,
Yunfei Dong
> > + mutex_unlock(&msg_queue->list_cnt_mutex);
> > +}
> > +
> > +static void vdec_msg_queue_dec(struct vdec_msg_queue *msg_queue,
> > int hardware_index)
> > +{
> > + mutex_lock(&msg_queue->list_cnt_mutex);
> > +
> > + if (hardware_index == MTK_VDEC_CORE)
> > + atomic_dec(&msg_queue->core_list_cnt);
> > + else
> > + atomic_dec(&msg_queue->lat_list_cnt);
>
> Same here.
>
> > +
> > + mutex_unlock(&msg_queue->list_cnt_mutex);
> > +}
> > +
>
> Regards,
> Angelo
>
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