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56 lines
1.8 KiB
Diff
56 lines
1.8 KiB
Diff
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From 20caa3607c972f5c28b3e9aceb0b8a1d2094c0a7 Mon Sep 17 00:00:00 2001
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From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Date: Tue, 24 Mar 2020 23:13:02 +0200
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Subject: [PATCH] media: bcm2835-unicam: Add support for the FRAME_SYNC
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event
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The FRAME_SYNC event is useful for userspace image processing algorithms
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to program the camera sensor as early as possible after frame start.
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Support it.
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Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
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Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
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Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
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Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
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---
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drivers/media/platform/bcm2835/bcm2835-unicam.c | 14 ++++++++++++++
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1 file changed, 14 insertions(+)
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--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c
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+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c
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@@ -772,6 +772,16 @@ static int unicam_all_nodes_disabled(str
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!dev->node[METADATA_PAD].streaming;
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}
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+static void unicam_queue_event_sof(struct unicam_device *unicam)
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+{
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+ struct v4l2_event event = {
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+ .type = V4L2_EVENT_FRAME_SYNC,
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+ .u.frame_sync.frame_sequence = unicam->sequence,
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+ };
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+
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+ v4l2_event_queue(&unicam->node[IMAGE_PAD].video_dev, &event);
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+}
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+
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/*
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* unicam_isr : ISR handler for unicam capture
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* @irq: irq number
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@@ -853,6 +863,8 @@ static irqreturn_t unicam_isr(int irq, v
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*/
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unicam_schedule_dummy_buffer(&unicam->node[i]);
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}
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+
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+ unicam_queue_event_sof(unicam);
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}
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/*
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* Cannot swap buffer at frame end, there may be a race condition
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@@ -2022,6 +2034,8 @@ static int unicam_subscribe_event(struct
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const struct v4l2_event_subscription *sub)
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{
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switch (sub->type) {
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+ case V4L2_EVENT_FRAME_SYNC:
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+ return v4l2_event_subscribe(fh, sub, 2, NULL);
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case V4L2_EVENT_SOURCE_CHANGE:
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return v4l2_event_subscribe(fh, sub, 4, NULL);
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}
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