From 4bf5d7236db0e122eb20cf73699557122f49c9dc Mon Sep 17 00:00:00 2001 From: Dave Stevenson <6by9@users.noreply.github.com> Date: Sat, 16 Apr 2016 23:09:54 +0100 Subject: [PATCH] V4L2: Request maximum resolution from GPU Get resolution information about the sensors from the GPU and advertise it correctly. Signed-off-by: Dave Stevenson <6by9@users.noreply.github.com> --- drivers/media/platform/bcm2835/bcm2835-camera.c | 59 +++++++++++++++++-------- drivers/media/platform/bcm2835/bcm2835-camera.h | 3 +- 2 files changed, 43 insertions(+), 19 deletions(-) --- a/drivers/media/platform/bcm2835/bcm2835-camera.c +++ b/drivers/media/platform/bcm2835/bcm2835-camera.c @@ -38,8 +38,6 @@ #define BM2835_MMAL_MODULE_NAME "bcm2835-v4l2" #define MIN_WIDTH 16 #define MIN_HEIGHT 16 -#define MAX_WIDTH 2592 -#define MAX_HEIGHT 1944 #define MIN_BUFFER_SIZE (80*1024) #define MAX_VIDEO_MODE_WIDTH 1280 @@ -729,11 +727,11 @@ static int vidioc_try_fmt_vid_overlay(st f->fmt.win.clipcount = 0; f->fmt.win.bitmap = NULL; - v4l_bound_align_image(&f->fmt.win.w.width, MIN_WIDTH, MAX_WIDTH, 1, - &f->fmt.win.w.height, MIN_HEIGHT, MAX_HEIGHT, + v4l_bound_align_image(&f->fmt.win.w.width, MIN_WIDTH, dev->max_width, 1, + &f->fmt.win.w.height, MIN_HEIGHT, dev->max_height, 1, 0); - v4l_bound_align_image(&f->fmt.win.w.left, MIN_WIDTH, MAX_WIDTH, 1, - &f->fmt.win.w.top, MIN_HEIGHT, MAX_HEIGHT, + v4l_bound_align_image(&f->fmt.win.w.left, MIN_WIDTH, dev->max_width, 1, + &f->fmt.win.w.top, MIN_HEIGHT, dev->max_height, 1, 0); v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, @@ -961,8 +959,9 @@ static int vidioc_try_fmt_vid_cap(struct "Clipping/aligning %dx%d format %08X\n", f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.pixelformat); - v4l_bound_align_image(&f->fmt.pix.width, MIN_WIDTH, MAX_WIDTH, 1, - &f->fmt.pix.height, MIN_HEIGHT, MAX_HEIGHT, 1, 0); + v4l_bound_align_image(&f->fmt.pix.width, MIN_WIDTH, dev->max_width, 1, + &f->fmt.pix.height, MIN_HEIGHT, dev->max_height, + 1, 0); f->fmt.pix.bytesperline = f->fmt.pix.width * mfmt->ybbp; /* Image buffer has to be padded to allow for alignment, even though @@ -1301,9 +1300,10 @@ static int vidioc_s_fmt_vid_cap(struct f int vidioc_enum_framesizes(struct file *file, void *fh, struct v4l2_frmsizeenum *fsize) { + struct bm2835_mmal_dev *dev = video_drvdata(file); static const struct v4l2_frmsize_stepwise sizes = { - MIN_WIDTH, MAX_WIDTH, 2, - MIN_HEIGHT, MAX_HEIGHT, 2 + MIN_WIDTH, 0, 2, + MIN_HEIGHT, 0, 2 }; int i; @@ -1316,6 +1316,8 @@ int vidioc_enum_framesizes(struct file * return -EINVAL; fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; fsize->stepwise = sizes; + fsize->stepwise.max_width = dev->max_width; + fsize->stepwise.max_height = dev->max_height; return 0; } @@ -1323,6 +1325,7 @@ int vidioc_enum_framesizes(struct file * static int vidioc_enum_frameintervals(struct file *file, void *priv, struct v4l2_frmivalenum *fival) { + struct bm2835_mmal_dev *dev = video_drvdata(file); int i; if (fival->index) @@ -1335,8 +1338,8 @@ static int vidioc_enum_frameintervals(st return -EINVAL; /* regarding width & height - we support any within range */ - if (fival->width < MIN_WIDTH || fival->width > MAX_WIDTH || - fival->height < MIN_HEIGHT || fival->height > MAX_HEIGHT) + if (fival->width < MIN_WIDTH || fival->width > dev->max_width || + fival->height < MIN_HEIGHT || fival->height > dev->max_height) return -EINVAL; fival->type = V4L2_FRMIVAL_TYPE_CONTINUOUS; @@ -1499,12 +1502,17 @@ static struct video_device vdev_template .release = video_device_release_empty, }; -static int get_num_cameras(struct vchiq_mmal_instance *instance) +/* Returns the number of cameras, and also the max resolution supported + * by those cameras. + */ +static int get_num_cameras(struct vchiq_mmal_instance *instance, + unsigned int resolutions[][2], int num_resolutions) { int ret; struct vchiq_mmal_component *cam_info_component; struct mmal_parameter_camera_info_t cam_info = {0}; int param_size = sizeof(cam_info); + int i; /* create a camera_info component */ ret = vchiq_mmal_component_init(instance, "camera_info", @@ -1520,6 +1528,14 @@ static int get_num_cameras(struct vchiq_ ¶m_size)) { pr_info("Failed to get camera info\n"); } + for (i = 0; + i < (cam_info.num_cameras > num_resolutions ? + cam_info.num_cameras : + num_resolutions); + i++) { + resolutions[i][0] = cam_info.cameras[i].max_width; + resolutions[i][1] = cam_info.cameras[i].max_height; + } vchiq_mmal_component_finalise(instance, cam_info_component); @@ -1528,12 +1544,13 @@ static int get_num_cameras(struct vchiq_ } static int set_camera_parameters(struct vchiq_mmal_instance *instance, - struct vchiq_mmal_component *camera) + struct vchiq_mmal_component *camera, + struct bm2835_mmal_dev *dev) { int ret; struct mmal_parameter_camera_config cam_config = { - .max_stills_w = MAX_WIDTH, - .max_stills_h = MAX_HEIGHT, + .max_stills_w = dev->max_width, + .max_stills_h = dev->max_height, .stills_yuv422 = 1, .one_shot_stills = 1, .max_preview_video_w = (max_video_width > 1920) ? @@ -1576,7 +1593,8 @@ static int __init mmal_init(struct bm283 } ret = set_camera_parameters(dev->instance, - dev->component[MMAL_COMPONENT_CAMERA]); + dev->component[MMAL_COMPONENT_CAMERA], + dev); if (ret < 0) goto unreg_camera; @@ -1838,12 +1856,15 @@ static int __init bm2835_mmal_init(void) int camera; unsigned int num_cameras; struct vchiq_mmal_instance *instance; + unsigned int resolutions[MAX_BCM2835_CAMERAS][2]; ret = vchiq_mmal_init(&instance); if (ret < 0) return ret; - num_cameras = get_num_cameras(instance); + num_cameras = get_num_cameras(instance, + resolutions, + MAX_BCM2835_CAMERAS); if (num_cameras > MAX_BCM2835_CAMERAS) num_cameras = MAX_BCM2835_CAMERAS; @@ -1853,6 +1874,8 @@ static int __init bm2835_mmal_init(void) return -ENOMEM; dev->camera_num = camera; + dev->max_width = resolutions[camera][0]; + dev->max_height = resolutions[camera][1]; /* setup device defaults */ dev->overlay.w.left = 150; --- a/drivers/media/platform/bcm2835/bcm2835-camera.h +++ b/drivers/media/platform/bcm2835/bcm2835-camera.h @@ -107,7 +107,8 @@ struct bm2835_mmal_dev { } capture; unsigned int camera_num; - + unsigned int max_width; + unsigned int max_height; }; int bm2835_mmal_init_controls(