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staging: media: tegra-video: add syncpts for Tegra20 to struct tegra_vi 

In preparation to implement Tegra20 parallel video capture, add a variable
to hold the required syncpt and document all the syncpt variables.

Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Luca Ceresoli 2023-04-18 10:00:51 +02:00 committed by Hans Verkuil
parent 89a0f667cb
commit 4cbd8479cd
1 changed files with 5 additions and 2 deletions
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7
drivers/staging/media/tegra-video/vi.h
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@ -117,11 +117,13 @@ struct tegra_vi {
* @vi: Tegra video input device structure
* @frame_start_sp: host1x syncpoint pointer to synchronize programmed capture
* start condition with hardware frame start events through host1x
* syncpoint counters.
* syncpoint counters. (Tegra210)
* @mw_ack_sp: host1x syncpoint pointer to synchronize programmed memory write
* ack trigger condition with hardware memory write done at end of
* frame through host1x syncpoint counters.
* frame through host1x syncpoint counters (On Tegra20 used for the
* OUT_1 syncpt)
* @sp_incr_lock: protects cpu syncpoint increment.
* @next_out_sp_idx: next expected value for mw_ack_sp[0], i.e. OUT_1 (Tegra20)
*
* @kthread_start_capture: kthread to start capture of single frame when
* vb buffer is available. This thread programs VI CSI hardware
@ -175,6 +177,7 @@ struct tegra_vi_channel {
struct host1x_syncpt *mw_ack_sp[GANG_PORTS_MAX];
/* protects the cpu syncpoint increment */
spinlock_t sp_incr_lock[GANG_PORTS_MAX];
u32 next_out_sp_idx;
struct task_struct *kthread_start_capture;
wait_queue_head_t start_wait;