On 14/12/16 02:27, Laurent Pinchart wrote:
> Move the list of pending IRQ wait instances to the omap_drm_private
> structure and the wait queue head to the IRQ wait structure.
>
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/omapdrm/omap_drv.h | 3 ++-
> drivers/gpu/drm/omapdrm/omap_irq.c | 42 ++++++++++++++++++++------------------
> 2 files changed, 24 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
> index 8ef7e8963bd9..b20377efd01b 100644
> --- a/drivers/gpu/drm/omapdrm/omap_drv.h
> +++ b/drivers/gpu/drm/omapdrm/omap_drv.h
> @@ -88,7 +88,8 @@ struct omap_drm_private {
> struct drm_property *zorder_prop;
>
> /* irq handling: */
> - struct list_head wait_list; /* list of omap_irq_wait */
> + spinlock_t wait_lock; /* protects the wait_list */
> + struct list_head wait_list; /* list of omap_irq_wait */
> uint32_t irq_mask; /* enabled irqs in addition to wait_list */
>
> /* atomic commit */
> diff --git a/drivers/gpu/drm/omapdrm/omap_irq.c b/drivers/gpu/drm/omapdrm/omap_irq.c
> index f9510c13e1a2..7555b62f6c53 100644
> --- a/drivers/gpu/drm/omapdrm/omap_irq.c
> +++ b/drivers/gpu/drm/omapdrm/omap_irq.c
> @@ -19,22 +19,21 @@
>
> #include "omap_drv.h"
>
> -static DEFINE_SPINLOCK(list_lock);
> -
> struct omap_irq_wait {
> struct list_head node;
> + wait_queue_head_t wq;
> uint32_t irqmask;
> int count;
> };
The wait_queue_head_t + count combination looks suspiciously like
completion. But as there's no wait_for_completion_count(), I guess the
current implementation is better.
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Tomi
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