From mboxrd@z Thu Jan 1 00:00:00 1970 From: stefan.wahren@i2se.com (Stefan Wahren) Date: Thu, 25 Oct 2018 17:29:34 +0200 Subject: [PATCH RFC 10/11] staging: bcm2835-camera: Provide more specific probe error messages In-Reply-To: <1540481375-15952-1-git-send-email-stefan.wahren@i2se.com> References: <1540481375-15952-1-git-send-email-stefan.wahren@i2se.com> Message-ID: <1540481375-15952-11-git-send-email-stefan.wahren@i2se.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Currently there is only a catch-all info message which print the relevant error code without any context. So add more specific error messages in order to narrow down possible issues. Signed-off-by: Stefan Wahren --- .../vc04_services/bcm2835-camera/bcm2835-camera.c | 58 +++++++++++++++------- 1 file changed, 39 insertions(+), 19 deletions(-) diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c index cd773eb..84ca22d 100644 --- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c +++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c @@ -1539,8 +1539,11 @@ static int mmal_init(struct bm2835_mmal_dev *dev) struct vchiq_mmal_component *camera; ret = vchiq_mmal_init(&dev->instance); - if (ret < 0) + if (ret < 0) { + v4l2_err(&dev->v4l2_dev, "%s: vchiq mmal init failed %d\n", + __func__, ret); return ret; + } /* get the camera component ready */ ret = vchiq_mmal_component_init(dev->instance, "ril.camera", @@ -1549,7 +1552,9 @@ static int mmal_init(struct bm2835_mmal_dev *dev) goto unreg_mmal; camera = dev->component[MMAL_COMPONENT_CAMERA]; - if (camera->outputs < MMAL_CAMERA_PORT_COUNT) { + if (camera->outputs < MMAL_CAMERA_PORT_COUNT) { + v4l2_err(&dev->v4l2_dev, "%s: too few camera outputs %d needed %d\n", + __func__, camera->outputs, MMAL_CAMERA_PORT_COUNT); ret = -EINVAL; goto unreg_camera; } @@ -1557,8 +1562,11 @@ static int mmal_init(struct bm2835_mmal_dev *dev) ret = set_camera_parameters(dev->instance, camera, dev); - if (ret < 0) + if (ret < 0) { + v4l2_err(&dev->v4l2_dev, "%s: unable to set camera parameters: %d\n", + __func__, ret); goto unreg_camera; + } /* There was an error in the firmware that meant the camera component * produced BGR instead of RGB. @@ -1647,8 +1655,8 @@ static int mmal_init(struct bm2835_mmal_dev *dev) if (dev->component[MMAL_COMPONENT_PREVIEW]->inputs < 1) { ret = -EINVAL; - pr_debug("too few input ports %d needed %d\n", - dev->component[MMAL_COMPONENT_PREVIEW]->inputs, 1); + v4l2_err(&dev->v4l2_dev, "%s: too few input ports %d needed %d\n", + __func__, dev->component[MMAL_COMPONENT_PREVIEW]->inputs, 1); goto unreg_preview; } @@ -1661,8 +1669,8 @@ static int mmal_init(struct bm2835_mmal_dev *dev) if (dev->component[MMAL_COMPONENT_IMAGE_ENCODE]->inputs < 1) { ret = -EINVAL; - v4l2_err(&dev->v4l2_dev, "too few input ports %d needed %d\n", - dev->component[MMAL_COMPONENT_IMAGE_ENCODE]->inputs, + v4l2_err(&dev->v4l2_dev, "%s: too few input ports %d needed %d\n", + __func__, dev->component[MMAL_COMPONENT_IMAGE_ENCODE]->inputs, 1); goto unreg_image_encoder; } @@ -1676,8 +1684,8 @@ static int mmal_init(struct bm2835_mmal_dev *dev) if (dev->component[MMAL_COMPONENT_VIDEO_ENCODE]->inputs < 1) { ret = -EINVAL; - v4l2_err(&dev->v4l2_dev, "too few input ports %d needed %d\n", - dev->component[MMAL_COMPONENT_VIDEO_ENCODE]->inputs, + v4l2_err(&dev->v4l2_dev, "%s: too few input ports %d needed %d\n", + __func__, dev->component[MMAL_COMPONENT_VIDEO_ENCODE]->inputs, 1); goto unreg_vid_encoder; } @@ -1706,8 +1714,11 @@ static int mmal_init(struct bm2835_mmal_dev *dev) sizeof(enable)); } ret = bm2835_mmal_set_all_camera_controls(dev); - if (ret < 0) + if (ret < 0) { + v4l2_err(&dev->v4l2_dev, "%s: failed to set all camera controls: %d\n", + __func__, ret); goto unreg_vid_encoder; + } return 0; @@ -1873,21 +1884,29 @@ static int bcm2835_mmal_probe(struct platform_device *pdev) snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s", BM2835_MMAL_MODULE_NAME); ret = v4l2_device_register(NULL, &dev->v4l2_dev); - if (ret) + if (ret) { + dev_err(&pdev->dev, "%s: could not register V4L2 device: %d\n", + __func__, ret); goto free_dev; + } /* setup v4l controls */ ret = bm2835_mmal_init_controls(dev, &dev->ctrl_handler); - if (ret < 0) + if (ret < 0) { + v4l2_err(&dev->v4l2_dev, "%s: could not init controls: %d\n", + __func__, ret); goto unreg_dev; + } dev->v4l2_dev.ctrl_handler = &dev->ctrl_handler; /* mmal init */ dev->instance = instance; ret = mmal_init(dev); - if (ret < 0) + if (ret < 0) { + v4l2_err(&dev->v4l2_dev, "%s: mmal init failed: %d\n", + __func__, ret); goto unreg_dev; - + } /* initialize queue */ q = &dev->capture.vb_vidq; memset(q, 0, sizeof(*q)); @@ -1905,16 +1924,19 @@ static int bcm2835_mmal_probe(struct platform_device *pdev) /* initialise video devices */ ret = bm2835_mmal_init_device(dev, &dev->vdev); - if (ret < 0) + if (ret < 0) { + v4l2_err(&dev->v4l2_dev, "%s: could not init device: %d\n", + __func__, ret); goto unreg_dev; + } /* Really want to call vidioc_s_fmt_vid_cap with the default * format, but currently the APIs don't join up. */ ret = mmal_setup_components(dev, &default_v4l2_format); if (ret < 0) { - v4l2_err(&dev->v4l2_dev, - "%s: could not setup components\n", __func__); + v4l2_err(&dev->v4l2_dev, "%s: could not setup components: %d\n", + __func__, ret); goto unreg_dev; } @@ -1938,8 +1960,6 @@ static int bcm2835_mmal_probe(struct platform_device *pdev) bcm2835_cleanup_instance(gdev[i]); gdev[i] = NULL; } - pr_info("%s: error %d while loading driver\n", - BM2835_MMAL_MODULE_NAME, ret); cleanup_mmal: vchiq_mmal_finalise(instance); -- 2.7.4