Revert "V4L/DVB (11906): saa7134: Use v4l bounding/alignment function"

This reverts commit bc52d6eb44de8f19934768d4d10d19fdbdc99950.

On newer kernels, a saa7134 board stopped to display TV video output
properly. After a bisect, I found it as the commit causing the issue.
Turns out that v4l_bound_align_image isn't doing the same bounding
calculation as manually done previously in saa7134_try_fmt_vid_cap.

What isn't equal is the calculation done in clamp align, while
previously it did "f->fmt.pix.width &= ~0x03", clamp_align function
does "Round to nearest aligned value" as stated in the comment, which
yields a different result. If I comment the round calculation in
clamp_align like this: "x = (x /*+ (1 << (align - 1))*/) & mask",
I get it fixed too, because this way the calculation is the same then.

Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/saa7134/saa7134-video.c b/drivers/media/video/saa7134/saa7134-video.c
index 31138d3..7806fb1 100644 (file)
--- a/drivers/media/video/saa7134/saa7134-video.c
+++ b/drivers/media/video/saa7134/saa7134-video.c
@@ -1632,8 +1632,15 @@ static int saa7134_try_fmt_vid_cap(struct file *file, void *priv,
        }
 
        f->fmt.pix.field = field;
-       v4l_bound_align_image(&f->fmt.pix.width, 48, maxw, 2,
-                             &f->fmt.pix.height, 32, maxh, 0, 0);
+       if (f->fmt.pix.width  < 48)
+               f->fmt.pix.width  = 48;
+       if (f->fmt.pix.height < 32)
+               f->fmt.pix.height = 32;
+       if (f->fmt.pix.width > maxw)
+               f->fmt.pix.width = maxw;
+       if (f->fmt.pix.height > maxh)
+               f->fmt.pix.height = maxh;
+       f->fmt.pix.width &= ~0x03;
        f->fmt.pix.bytesperline =
                (f->fmt.pix.width * fmt->depth) >> 3;
        f->fmt.pix.sizeimage =