diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Add-support-for-the-FRAME_SYNC-.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Add-support-for-the-FRAME_SYNC-.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Add-support-for-the-FRAME_SYNC-.patch b/target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Add-support-for-the-FRAME_SYNC-.patch new file mode 100644 index 0000000000..544d597a35 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0652-media-bcm2835-unicam-Add-support-for-the-FRAME_SYNC-.patch @@ -0,0 +1,55 @@ +From 20caa3607c972f5c28b3e9aceb0b8a1d2094c0a7 Mon Sep 17 00:00:00 2001 +From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> +Date: Tue, 24 Mar 2020 23:13:02 +0200 +Subject: [PATCH] media: bcm2835-unicam: Add support for the FRAME_SYNC + event + +The FRAME_SYNC event is useful for userspace image processing algorithms +to program the camera sensor as early as possible after frame start. +Support it. + +Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> +Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com> +Reviewed-by: Jacopo Mondi <jacopo@jmondi.org> +Reviewed-by: Naushir Patuck <naush@raspberrypi.com> +--- + drivers/media/platform/bcm2835/bcm2835-unicam.c | 14 ++++++++++++++ + 1 file changed, 14 insertions(+) + +--- a/drivers/media/platform/bcm2835/bcm2835-unicam.c ++++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c +@@ -772,6 +772,16 @@ static int unicam_all_nodes_disabled(str + !dev->node[METADATA_PAD].streaming; + } + ++static void unicam_queue_event_sof(struct unicam_device *unicam) ++{ ++ struct v4l2_event event = { ++ .type = V4L2_EVENT_FRAME_SYNC, ++ .u.frame_sync.frame_sequence = unicam->sequence, ++ }; ++ ++ v4l2_event_queue(&unicam->node[IMAGE_PAD].video_dev, &event); ++} ++ + /* + * unicam_isr : ISR handler for unicam capture + * @irq: irq number +@@ -853,6 +863,8 @@ static irqreturn_t unicam_isr(int irq, v + */ + unicam_schedule_dummy_buffer(&unicam->node[i]); + } ++ ++ unicam_queue_event_sof(unicam); + } + /* + * Cannot swap buffer at frame end, there may be a race condition +@@ -2022,6 +2034,8 @@ static int unicam_subscribe_event(struct + const struct v4l2_event_subscription *sub) + { + switch (sub->type) { ++ case V4L2_EVENT_FRAME_SYNC: ++ return v4l2_event_subscribe(fh, sub, 2, NULL); + case V4L2_EVENT_SOURCE_CHANGE: + return v4l2_event_subscribe(fh, sub, 4, NULL); + } |