From 1c5c50685a04668a4a4431534bca804969fac3c6 Mon Sep 17 00:00:00 2001 From: Mauro Carvalho Chehab Date: Sun, 16 Oct 2011 13:52:43 -0200 Subject: [PATCH] [media] em28xx: implement VIDIOC_ENUM_FRAMESIZES Pidgin uses gstreamer (and libv4l) to work. Without implementing this ioctl, it won't detect properly the size range, and driver will fail. So, this patch is required, in order to use an em27xx webcam, like Silvercrest. The pigdin/gstreamer/libv4l needs to be fixed, as it shouldn't assume that all drivers will implement this optional ioctl, but, at least now, devices with em28xx have a better chance of working with pidgin. Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/em28xx/em28xx-video.c | 41 ++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c index 62182e31106..9b4557a2f6d 100644 --- a/drivers/media/video/em28xx/em28xx-video.c +++ b/drivers/media/video/em28xx/em28xx-video.c @@ -1802,6 +1802,45 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv, return 0; } +static int vidioc_enum_framesizes(struct file *file, void *priv, + struct v4l2_frmsizeenum *fsize) +{ + struct em28xx_fh *fh = priv; + struct em28xx *dev = fh->dev; + struct em28xx_fmt *fmt; + unsigned int maxw = norm_maxw(dev); + unsigned int maxh = norm_maxh(dev); + + fmt = format_by_fourcc(fsize->pixel_format); + if (!fmt) { + em28xx_videodbg("Fourcc format (%08x) invalid.\n", + fsize->pixel_format); + return -EINVAL; + } + + if (dev->board.is_em2800) { + if (fsize->index > 1) + return -EINVAL; + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE; + fsize->discrete.width = maxw / (1 + fsize->index); + fsize->discrete.height = maxh / (1 + fsize->index); + return 0; + } + + if (fsize->index != 0) + return -EINVAL; + + /* Report a continuous range */ + fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE; + fsize->stepwise.min_width = 48; + fsize->stepwise.min_height = 32; + fsize->stepwise.max_width = maxw; + fsize->stepwise.max_height = maxh; + fsize->stepwise.step_width = 1; + fsize->stepwise.step_height = 1; + return 0; +} + /* Sliced VBI ioctls */ static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv, struct v4l2_format *f) @@ -2356,10 +2395,10 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = { .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, .vidioc_g_fmt_vbi_cap = vidioc_g_fmt_vbi_cap, .vidioc_s_fmt_vbi_cap = vidioc_s_fmt_vbi_cap, + .vidioc_enum_framesizes = vidioc_enum_framesizes, .vidioc_g_audio = vidioc_g_audio, .vidioc_s_audio = vidioc_s_audio, .vidioc_cropcap = vidioc_cropcap, - .vidioc_g_fmt_sliced_vbi_cap = vidioc_g_fmt_sliced_vbi_cap, .vidioc_try_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap, .vidioc_s_fmt_sliced_vbi_cap = vidioc_try_set_sliced_vbi_cap, -- 2.39.2