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| author | Luca Ceresoli <luca.ceresoli@bootlin.com> | 2023-04-18 10:00:51 +0200 |
|---|---|---|
| committer | Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2023-05-25 13:04:48 +0200 |
| commit | 4cbd8479cd2ea6d36597ad7c16860a074d804f85 (patch) | |
| tree | cf4a589a17024f7c72d5004f10348f4096f9bec8 /drivers | |
| parent | 89a0f667cb20c53dd9164d72a565a146af0fd11e (diff) | |
| download | lwn-4cbd8479cd2ea6d36597ad7c16860a074d804f85.tar.gz lwn-4cbd8479cd2ea6d36597ad7c16860a074d804f85.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/media/tegra-video/vi.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/staging/media/tegra-video/vi.h b/drivers/staging/media/tegra-video/vi.h index dfb5870b1411..02f940f2e2eb 100644 --- a/drivers/staging/media/tegra-video/vi.h +++ b/drivers/staging/media/tegra-video/vi.h @@ -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; |