V4L/DVB (11902): pxa-camera: Use v4l bounding/alignment function

The v4l function has a better algorithm for aligning image size.

For instance the old code would change 159x243 into 156x240 to meet the
alignment requirements.  The new function will use 160x243, which is a lot
closer to what was asked for originally.

Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Trent Piepho <xyzzy@speakeasy.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/video/pxa_camera.c b/drivers/media/video/pxa_camera.c
index f60de40..46e0d8a 100644 (file)
--- a/drivers/media/video/pxa_camera.c
+++ b/drivers/media/video/pxa_camera.c
@@ -163,13 +163,6 @@
                        CICR0_EOFM | CICR0_FOM)
 
 /*
- * YUV422P picture size should be a multiple of 16, so the heuristic aligns
- * height, width on 4 byte boundaries to reach the 16 multiple for the size.
- */
-#define YUV422P_X_Y_ALIGN 4
-#define YUV422P_SIZE_ALIGN YUV422P_X_Y_ALIGN * YUV422P_X_Y_ALIGN
-
-/*
  * Structures
  */
 enum pxa_camera_active_dma {
@@ -1398,28 +1391,15 @@ static int pxa_camera_try_fmt(struct soc_camera_device *icd,
                return -EINVAL;
        }
 
-       /* limit to pxa hardware capabilities */
-       if (pix->height < 32)
-               pix->height = 32;
-       if (pix->height > 2048)
-               pix->height = 2048;
-       if (pix->width < 48)
-               pix->width = 48;
-       if (pix->width > 2048)
-               pix->width = 2048;
-       pix->width &= ~0x01;
-
        /*
-        * YUV422P planar format requires images size to be a 16 bytes
-        * multiple. If not, zeros will be inserted between Y and U planes, and
-        * U and V planes, and YUV422P standard would be violated.
+        * Limit to pxa hardware capabilities.  YUV422P planar format requires
+        * images size to be a multiple of 16 bytes.  If not, zeros will be
+        * inserted between Y and U planes, and U and V planes, which violates
+        * the YUV422P standard.
         */
-       if (xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUV422P) {
-               if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN))
-                       pix->height = ALIGN(pix->height, YUV422P_X_Y_ALIGN);
-               if (!IS_ALIGNED(pix->width * pix->height, YUV422P_SIZE_ALIGN))
-                       pix->width = ALIGN(pix->width, YUV422P_X_Y_ALIGN);
-       }
+       v4l_bound_align_image(&pix->width, 48, 2048, 1,
+                             &pix->height, 32, 2048, 0,
+                             xlate->host_fmt->fourcc == V4L2_PIX_FMT_YUV422P ? 4 : 0);
 
        pix->bytesperline = pix->width *
                DIV_ROUND_UP(xlate->host_fmt->depth, 8);