[media] tw5864: crop picture width to 704

Previously, width of 720 was used, but it gives 16-pixel wide black bar
at right side of encoded picture.

Signed-off-by: Andrey Utkin <andrey.utkin@corp.bluecherry.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/pci/tw5864/tw5864-reg.h

@@ -1879,6 +1879,14 @@
 #define TW5864_INDIR_IN_PIC_HEIGHT(channel) (0x201 + 4 * channel)
 #define TW5864_INDIR_OUT_PIC_WIDTH(channel) (0x202 + 4 * channel)
 #define TW5864_INDIR_OUT_PIC_HEIGHT(channel) (0x203 + 4 * channel)
+
+/* Some registers skipped */
+
+#define TW5864_INDIR_CROP_ETC 0x260
+/* Define controls in register TW5864_INDIR_CROP_ETC */
+/* Enable cropping from 720 to 704 */
+#define TW5864_INDIR_CROP_ETC_CROP_EN 0x4
+
 /*
  * Interrupt status register from the front-end. Write "1" to each bit to clear
  * the interrupt

drivers/media/pci/tw5864/tw5864-video.c

@@ -330,6 +330,15 @@ static int tw5864_enable_input(struct tw5864_input *input)
 	tw_indir_writeb(TW5864_INDIR_OUT_PIC_WIDTH(nr), input->width / 4);
 	tw_indir_writeb(TW5864_INDIR_OUT_PIC_HEIGHT(nr), input->height / 4);
 
+	/*
+	 * Crop width from 720 to 704.
+	 * Above register settings need value 720 involved.
+	 */
+	input->width = 704;
+	tw_indir_writeb(TW5864_INDIR_CROP_ETC,
+			tw_indir_readb(TW5864_INDIR_CROP_ETC) |
+			TW5864_INDIR_CROP_ETC_CROP_EN);
+
 	tw_writel(TW5864_DSP_PIC_MAX_MB,
 		  ((input->width / 16) << 8) | (input->height / 16));
 
@@ -532,7 +541,7 @@ static int tw5864_fmt_vid_cap(struct file *file, void *priv,
 {
 	struct tw5864_input *input = video_drvdata(file);
 
-	f->fmt.pix.width = 720;
+	f->fmt.pix.width = 704;
 	switch (input->std) {
 	default:
 		WARN_ON_ONCE(1);
@@ -738,7 +747,7 @@ static int tw5864_enum_framesizes(struct file *file, void *priv,
 		return -EINVAL;
 
 	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
-	fsize->discrete.width = 720;
+	fsize->discrete.width = 704;
 	fsize->discrete.height = input->std == STD_NTSC ? 480 : 576;
 
 	return 0;