This is a note to let you know that I've just added the patch titled [media] bttv: Width must be a multiple of 16 when capturing planar formats to the 3.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bttv-width-must-be-a-multiple-of-16-when-capturing-planar-formats.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 5c915c68763889f0183a1cc61c84bb228b60124a Mon Sep 17 00:00:00 2001 From: Hans de Goede <hdegoede@xxxxxxxxxx> Date: Sun, 7 Feb 2016 09:24:29 -0200 Subject: [media] bttv: Width must be a multiple of 16 when capturing planar formats From: Hans de Goede <hdegoede@xxxxxxxxxx> commit 5c915c68763889f0183a1cc61c84bb228b60124a upstream. On my bttv card "Hauppauge WinTV [card=10]" capturing in YV12 fmt at max size results in a solid green rectangle being captured (all colors 0 in YUV). This turns out to be caused by max-width (924) not being a multiple of 16. We've likely never hit this problem before since normally xawtv / tvtime, etc. will prefer packed pixel formats. But when using a video card which is using xf86-video-modesetting + glamor, only planar XVideo fmts are available, and xawtv will chose a matching capture format to avoid needing to do conversion, triggering the solid green window problem. Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/media/pci/bt8xx/bttv-driver.c | 26 ++++++++++++++++++++------ 1 file changed, 20 insertions(+), 6 deletions(-) --- a/drivers/media/pci/bt8xx/bttv-driver.c +++ b/drivers/media/pci/bt8xx/bttv-driver.c @@ -2333,6 +2333,19 @@ static int bttv_g_fmt_vid_overlay(struct return 0; } +static void bttv_get_width_mask_vid_cap(const struct bttv_format *fmt, + unsigned int *width_mask, + unsigned int *width_bias) +{ + if (fmt->flags & FORMAT_FLAGS_PLANAR) { + *width_mask = ~15; /* width must be a multiple of 16 pixels */ + *width_bias = 8; /* nearest */ + } else { + *width_mask = ~3; /* width must be a multiple of 4 pixels */ + *width_bias = 2; /* nearest */ + } +} + static int bttv_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f) { @@ -2342,6 +2355,7 @@ static int bttv_try_fmt_vid_cap(struct f enum v4l2_field field; __s32 width, height; __s32 height2; + unsigned int width_mask, width_bias; int rc; fmt = format_by_fourcc(f->fmt.pix.pixelformat); @@ -2374,9 +2388,9 @@ static int bttv_try_fmt_vid_cap(struct f width = f->fmt.pix.width; height = f->fmt.pix.height; + bttv_get_width_mask_vid_cap(fmt, &width_mask, &width_bias); rc = limit_scaled_size_lock(fh, &width, &height, field, - /* width_mask: 4 pixels */ ~3, - /* width_bias: nearest */ 2, + width_mask, width_bias, /* adjust_size */ 1, /* adjust_crop */ 0); if (0 != rc) @@ -2409,6 +2423,7 @@ static int bttv_s_fmt_vid_cap(struct fil struct bttv_fh *fh = priv; struct bttv *btv = fh->btv; __s32 width, height; + unsigned int width_mask, width_bias; enum v4l2_field field; retval = bttv_switch_type(fh, f->type); @@ -2423,9 +2438,10 @@ static int bttv_s_fmt_vid_cap(struct fil height = f->fmt.pix.height; field = f->fmt.pix.field; + fmt = format_by_fourcc(f->fmt.pix.pixelformat); + bttv_get_width_mask_vid_cap(fmt, &width_mask, &width_bias); retval = limit_scaled_size_lock(fh, &width, &height, f->fmt.pix.field, - /* width_mask: 4 pixels */ ~3, - /* width_bias: nearest */ 2, + width_mask, width_bias, /* adjust_size */ 1, /* adjust_crop */ 1); if (0 != retval) @@ -2433,8 +2449,6 @@ static int bttv_s_fmt_vid_cap(struct fil f->fmt.pix.field = field; - fmt = format_by_fourcc(f->fmt.pix.pixelformat); - /* update our state informations */ fh->fmt = fmt; fh->cap.field = f->fmt.pix.field; Patches currently in stable-queue which might be from hdegoede@xxxxxxxxxx are queue-3.14/pwc-add-usb-id-for-philips-spc880nc-webcam.patch queue-3.14/saa7134-fix-bytesperline-not-being-set-correctly-for-planar-formats.patch queue-3.14/bttv-width-must-be-a-multiple-of-16-when-capturing-planar-formats.patch queue-3.14/usb-uas-reduce-can_queue-to-max_cmnds.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html