186 lines
8.8 KiB
Diff
186 lines
8.8 KiB
Diff
From patchwork Wed Jun 26 15:48:11 2019
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0LyS5K-1ibrK32soI-015u60; Wed, 26 Jun 2019 17:48:33 +0200
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From: Stefan Wahren <wahrenst@gmx.net>
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To: Eric Anholt <eric@anholt.net>,
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Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
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Madhumitha Prabakaran <madhumithabiw@gmail.com>
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Subject: [PATCH V2] staging: bcm2835-camera: Restore return behavior of
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ctrl_set_bitrate()
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Date: Wed, 26 Jun 2019 17:48:11 +0200
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Cc: devel@driverdev.osuosl.org, Stefan Wahren <wahrenst@gmx.net>,
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Dave Stevenson <dave.stevenson@raspberrypi.org>,
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Dan Carpenter <dan.carpenter@oracle.com>,
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The commit 52c4dfcead49 ("Staging: vc04_services: Cleanup in
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ctrl_set_bitrate()") changed the return behavior of ctrl_set_bitrate().
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We cannot do this because of a bug in the firmware, which breaks probing
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of bcm2835-camera:
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bcm2835-v4l2: mmal_init: failed to set all camera controls: -3
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Cleanup: Destroy video encoder
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Cleanup: Destroy image encoder
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Cleanup: Destroy video render
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Cleanup: Destroy camera
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bcm2835-v4l2: bcm2835_mmal_probe: mmal init failed: -3
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bcm2835-camera: probe of bcm2835-camera failed with error -3
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So restore the old behavior, add an explaining comment and a debug message
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to verify that the bug has been fixed in firmware.
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Fixes: 52c4dfcead49 ("Staging: vc04_services: Cleanup in ctrl_set_bitrate()")
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Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
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Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
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---
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.../staging/vc04_services/bcm2835-camera/controls.c | 19 ++++++++++++++++---
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1 file changed, 16 insertions(+), 3 deletions(-)
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Changes in V2:
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- add an explaining comment as suggest by Dan and Dave
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- add a debug message to verify the firmware behavior
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--
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2.7.4
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diff --git a/drivers/staging/vc04_services/bcm2835-camera/controls.c b/drivers/staging/vc04_services/bcm2835-camera/controls.c
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index d60e378..c251164 100644
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--- a/drivers/staging/vc04_services/bcm2835-camera/controls.c
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+++ b/drivers/staging/vc04_services/bcm2835-camera/controls.c
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@@ -604,15 +604,28 @@ static int ctrl_set_bitrate(struct bm2835_mmal_dev *dev,
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struct v4l2_ctrl *ctrl,
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const struct bm2835_mmal_v4l2_ctrl *mmal_ctrl)
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{
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+ int ret;
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struct vchiq_mmal_port *encoder_out;
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dev->capture.encode_bitrate = ctrl->val;
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encoder_out = &dev->component[MMAL_COMPONENT_VIDEO_ENCODE]->output[0];
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- return vchiq_mmal_port_parameter_set(dev->instance, encoder_out,
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- mmal_ctrl->mmal_id, &ctrl->val,
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- sizeof(ctrl->val));
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+ ret = vchiq_mmal_port_parameter_set(dev->instance, encoder_out,
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+ mmal_ctrl->mmal_id, &ctrl->val,
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+ sizeof(ctrl->val));
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+
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+ v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
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+ "%s: After: mmal_ctrl:%p ctrl id:0x%x ctrl val:%d ret %d(%d)\n",
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+ __func__, mmal_ctrl, ctrl->id, ctrl->val, ret,
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+ (ret == 0 ? 0 : -EINVAL));
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+
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+ /*
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+ * Older firmware versions (pre July 2019) have a bug in handling
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+ * MMAL_PARAMETER_VIDEO_BIT_RATE that result in the call
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+ * returning -MMAL_MSG_STATUS_EINVAL. So ignore errors from this call.
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+ */
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+ return 0;
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}
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static int ctrl_set_bitrate_mode(struct bm2835_mmal_dev *dev,
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