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v4l: vsp1: Fill display list headers without holding dlm spinlock

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The display list headers are filled using information from the display
list only. Lower the display list manager spinlock contention by filling
the headers without holding the lock.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Laurent Pinchart 2017-05-30 03:40:35 +03:00
parent e6742e1021
commit 1dd48e4876
1 changed files with 4 additions and 2 deletions
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6
drivers/media/platform/vsp1/vsp1_dl.c
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@ -483,8 +483,6 @@ void vsp1_dl_list_commit(struct vsp1_dl_list *dl)
unsigned long flags;
bool update;
spin_lock_irqsave(&dlm->lock, flags);
if (dl->dlm->mode == VSP1_DL_MODE_HEADER) {
struct vsp1_dl_list *dl_child;
@ -501,7 +499,11 @@ void vsp1_dl_list_commit(struct vsp1_dl_list *dl)
vsp1_dl_list_fill_header(dl_child, last);
}
}
spin_lock_irqsave(&dlm->lock, flags);
if (dl->dlm->mode == VSP1_DL_MODE_HEADER) {
/*
* Commit the head display list to hardware. Chained headers
* will auto-start.