[PATCH] v4l: 850: update em2800 scaler code and comments based on info from empiatech
- Update em2800 scaler code and comments based on info from empiatech
Signed-off-by: Sascha Sommer <saschasommer@freenet.de>
Signed-off-by: Markus Rechberger <mrechberger@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 9f79c39..a569be3 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -1308,14 +1308,18 @@
if (width > maxw)
width = maxw;
- /* FIXME*/
if(dev->is_em2800){
- /* we only know how to scale to 50% */
+ /* the em2800 can only scale down to 50% */
if(height % (maxh / 2))
height=maxh;
if(width % (maxw / 2))
width=maxw;
- /* larger resoltion don't seem to work either */
+ /* according to empiatech support */
+ /* the MaxPacketSize is to small to support */
+ /* framesizes larger than 640x480 @ 30 fps */
+ /* or 640x576 @ 25 fps. As this would cut */
+ /* of a part of the image we prefer */
+ /* 360x576 or 360x480 for now */
if(width == maxw && height == maxh)
width /= 2;
}