diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0282-media-bcm2835-unicam-Power-on-subdev-on-open-release.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0282-media-bcm2835-unicam-Power-on-subdev-on-open-release.patch | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0282-media-bcm2835-unicam-Power-on-subdev-on-open-release.patch b/target/linux/brcm2708/patches-4.19/950-0282-media-bcm2835-unicam-Power-on-subdev-on-open-release.patch deleted file mode 100644 index 0946b77037..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0282-media-bcm2835-unicam-Power-on-subdev-on-open-release.patch +++ /dev/null @@ -1,121 +0,0 @@ -From bf1805e0c8c4fc05e2a13b0a03b510ff4e523418 Mon Sep 17 00:00:00 2001 -From: Dave Stevenson <dave.stevenson@raspberrypi.org> -Date: Tue, 29 Jan 2019 15:56:10 +0000 -Subject: [PATCH] media:bcm2835-unicam: Power on subdev on - open/release, not streaming - -The driver was powering on the source subdevice as part of STREAMON, -and powering it off in STREAMOFF. This isn't so great if there is a -significant amount of setup required for your device. - -Copy the approach taken in the Atmel ISC driver where s_power(1) is called -on first file handle open, and s_power(0) is called on the last release. - -See https://www.raspberrypi.org/forums/viewtopic.php?f=43&t=232437 - -Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> ---- - .../media/platform/bcm2835/bcm2835-unicam.c | 68 +++++++++++++++---- - 1 file changed, 54 insertions(+), 14 deletions(-) - ---- a/drivers/media/platform/bcm2835/bcm2835-unicam.c -+++ b/drivers/media/platform/bcm2835/bcm2835-unicam.c -@@ -1237,11 +1237,6 @@ static int unicam_start_streaming(struct - unicam_err(dev, "Failed to enable CSI clock: %d\n", ret); - goto err_pm_put; - } -- ret = v4l2_subdev_call(dev->sensor, core, s_power, 1); -- if (ret < 0 && ret != -ENOIOCTLCMD) { -- unicam_err(dev, "power on failed in subdev\n"); -- goto err_clock_unprepare; -- } - dev->streaming = 1; - - unicam_start_rx(dev, addr); -@@ -1256,8 +1251,6 @@ static int unicam_start_streaming(struct - - err_disable_unicam: - unicam_disable(dev); -- v4l2_subdev_call(dev->sensor, core, s_power, 0); --err_clock_unprepare: - clk_disable_unprepare(dev->clock); - err_pm_put: - unicam_runtime_put(dev); -@@ -1306,11 +1299,6 @@ static void unicam_stop_streaming(struct - dev->next_frm = NULL; - spin_unlock_irqrestore(&dev->dma_queue_lock, flags); - -- if (v4l2_subdev_has_op(dev->sensor, core, s_power)) { -- if (v4l2_subdev_call(dev->sensor, core, s_power, 0) < 0) -- unicam_err(dev, "power off failed in subdev\n"); -- } -- - clk_disable_unprepare(dev->clock); - unicam_runtime_put(dev); - } -@@ -1543,11 +1531,63 @@ static const struct vb2_ops unicam_video - .stop_streaming = unicam_stop_streaming, - }; - -+/* -+ * unicam_open : This function is based on the v4l2_fh_open helper function. -+ * It has been augmented to handle sensor subdevice power management, -+ */ -+static int unicam_open(struct file *file) -+{ -+ struct unicam_device *dev = video_drvdata(file); -+ int ret; -+ -+ mutex_lock(&dev->lock); -+ -+ ret = v4l2_fh_open(file); -+ if (ret) { -+ unicam_err(dev, "v4l2_fh_open failed\n"); -+ goto unlock; -+ } -+ -+ if (!v4l2_fh_is_singular_file(file)) -+ goto unlock; -+ -+ ret = v4l2_subdev_call(dev->sensor, core, s_power, 1); -+ if (ret < 0 && ret != -ENOIOCTLCMD) { -+ v4l2_fh_release(file); -+ goto unlock; -+ } -+ -+unlock: -+ mutex_unlock(&dev->lock); -+ return ret; -+} -+ -+static int unicam_release(struct file *file) -+{ -+ struct unicam_device *dev = video_drvdata(file); -+ struct v4l2_subdev *sd = dev->sensor; -+ bool fh_singular; -+ int ret; -+ -+ mutex_lock(&dev->lock); -+ -+ fh_singular = v4l2_fh_is_singular_file(file); -+ -+ ret = _vb2_fop_release(file, NULL); -+ -+ if (fh_singular) -+ v4l2_subdev_call(sd, core, s_power, 0); -+ -+ mutex_unlock(&dev->lock); -+ -+ return ret; -+} -+ - /* unicam capture driver file operations */ - static const struct v4l2_file_operations unicam_fops = { - .owner = THIS_MODULE, -- .open = v4l2_fh_open, -- .release = vb2_fop_release, -+ .open = unicam_open, -+ .release = unicam_release, - .read = vb2_fop_read, - .poll = vb2_fop_poll, - .unlocked_ioctl = video_ioctl2, |