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52 lines
1.8 KiB
Diff
52 lines
1.8 KiB
Diff
From 7d9a42d3ff608e219c882968cb9528301ab8a052 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Jakub=20Van=C4=9Bk?= <linuxtardis@gmail.com>
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Date: Wed, 7 Jul 2021 22:48:20 +0200
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Subject: [PATCH] media: bcm2835-unicam: Forward input status from subdevice
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The vidioc_enum_input() v4l2 ioctl is capable of returning
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sensor/input status as well. This is used in current
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GStreamer HEAD for signal detection [1].
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bcm2835-unicam does handle this syscall, but it didn't ask
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the subdevice driver about the input status. The input then
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appeared as always present.
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This commit adds the necessary query. There is a precedent for
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this - the R-Car VIN V4L2 driver does a similar call [2].
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[1]: https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/blob/ce0be27caf69aa9d96b73bc2b50737451b6f6936/sys/v4l2/gstv4l2src.c#L553
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[2]: https://github.com/raspberrypi/linux/blob/7fb9d006d3ff3baf2e205e0c85c4e4fd0a64fcd0/drivers/media/platform/rcar-vin/rcar-v4l2.c#L548
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Signed-off-by: Jakub Vaněk <linuxtardis@gmail.com>
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---
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drivers/media/platform/bcm2835/bcm2835-unicam.c | 9 +++++++++
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1 file changed, 9 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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@@ -1809,6 +1809,7 @@ static int unicam_enum_input(struct file
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{
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struct unicam_node *node = video_drvdata(file);
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struct unicam_device *dev = node->dev;
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+ int ret;
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if (inp->index != 0)
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return -EINVAL;
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@@ -1825,6 +1826,14 @@ static int unicam_enum_input(struct file
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inp->capabilities = 0;
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inp->std = 0;
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}
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+
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+ if (v4l2_subdev_has_op(dev->sensor, video, g_input_status)) {
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+ ret = v4l2_subdev_call(dev->sensor, video, g_input_status,
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+ &inp->status);
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+ if (ret < 0)
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+ return ret;
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+ }
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+
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snprintf(inp->name, sizeof(inp->name), "Camera 0");
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return 0;
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}
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