[media] pwc: Fix pixfmt handling

Before this patch various code in the mode setting patch checked
pdev->pixfmt, but that was not set until the mode setting succeeded, so
it was looking at the old pixfmt! This patch fixes this by making the
pixfmt a parameter to set_video_mode, and setting it from set_video_mode
on success.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/pwc/pwc-ctrl.c

@@ -168,8 +168,8 @@ int send_control_msg(struct pwc_device *pdev,
 		request, value, pdev->vcinterface, buf, buflen);
 }
 
-static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames,
-			       int *compression)
+static int set_video_mode_Nala(struct pwc_device *pdev, int size, int pixfmt,
+			       int frames, int *compression)
 {
 	unsigned char buf[3];
 	int ret, fps;
@@ -212,14 +212,14 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames,
 		PWC_DEBUG_MODULE("Failed to send video command... %d\n", ret);
 		return ret;
 	}
-	if (pEntry->compressed && pdev->pixfmt == V4L2_PIX_FMT_YUV420) {
+	if (pEntry->compressed && pixfmt == V4L2_PIX_FMT_YUV420)
 		pwc_dec1_init(pdev, buf);
-	}
 
 	pdev->cmd_len = 3;
 	memcpy(pdev->cmd_buf, buf, 3);
 
 	/* Set various parameters */
+	pdev->pixfmt = pixfmt;
 	pdev->vframes = frames;
 	pdev->valternate = pEntry->alternate;
 	pdev->width  = pwc_image_sizes[size][0];
@@ -245,8 +245,8 @@ static int set_video_mode_Nala(struct pwc_device *pdev, int size, int frames,
 }
 
 
-static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
-	int *compression)
+static int set_video_mode_Timon(struct pwc_device *pdev, int size, int pixfmt,
+				int frames, int *compression)
 {
 	unsigned char buf[13];
 	const struct Timon_table_entry *pChoose;
@@ -278,14 +278,14 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
 	if (ret < 0)
 		return ret;
 
-	if (pChoose->bandlength > 0 && pdev->pixfmt == V4L2_PIX_FMT_YUV420) {
+	if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
 		pwc_dec23_init(pdev, buf);
-	}
 
 	pdev->cmd_len = 13;
 	memcpy(pdev->cmd_buf, buf, 13);
 
 	/* Set various parameters */
+	pdev->pixfmt = pixfmt;
 	pdev->vframes = (fps + 1) * 5;
 	pdev->valternate = pChoose->alternate;
 	pdev->width  = pwc_image_sizes[size][0];
@@ -299,8 +299,8 @@ static int set_video_mode_Timon(struct pwc_device *pdev, int size, int frames,
 }
 
 
-static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
-	int *compression)
+static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int pixfmt,
+				int frames, int *compression)
 {
 	const struct Kiara_table_entry *pChoose = NULL;
 	int fps, ret;
@@ -336,13 +336,13 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
 	if (ret < 0)
 		return ret;
 
-	if (pChoose->bandlength > 0 && pdev->pixfmt == V4L2_PIX_FMT_YUV420) {
+	if (pChoose->bandlength > 0 && pixfmt == V4L2_PIX_FMT_YUV420)
 		pwc_dec23_init(pdev, buf);
-	}
 
 	pdev->cmd_len = 12;
 	memcpy(pdev->cmd_buf, buf, 12);
 	/* All set and go */
+	pdev->pixfmt = pixfmt;
 	pdev->vframes = (fps + 1) * 5;
 	pdev->valternate = pChoose->alternate;
 	pdev->width  = pwc_image_sizes[size][0];
@@ -358,23 +358,24 @@ static int set_video_mode_Kiara(struct pwc_device *pdev, int size, int frames,
 }
 
 int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
-	int frames, int *compression)
+	int pixfmt, int frames, int *compression)
 {
 	int ret, size;
 
 	PWC_DEBUG_FLOW("set_video_mode(%dx%d @ %d, pixfmt %08x).\n",
-		       width, height, frames, pdev->pixfmt);
+		       width, height, frames, pixfmt);
 	size = pwc_get_size(pdev, width, height);
 	PWC_TRACE("decode_size = %d.\n", size);
 
 	if (DEVICE_USE_CODEC1(pdev->type)) {
-		ret = set_video_mode_Nala(pdev, size, frames, compression);
-
+		ret = set_video_mode_Nala(pdev, size, pixfmt, frames,
+					  compression);
 	} else if (DEVICE_USE_CODEC3(pdev->type)) {
-		ret = set_video_mode_Kiara(pdev, size, frames, compression);
-
+		ret = set_video_mode_Kiara(pdev, size, pixfmt, frames,
+					   compression);
 	} else {
-		ret = set_video_mode_Timon(pdev, size, frames, compression);
+		ret = set_video_mode_Timon(pdev, size, pixfmt, frames,
+					   compression);
 	}
 	if (ret < 0) {
 		PWC_ERROR("Failed to set video mode %s@%d fps; return code = %d\n", size2name[size], frames, ret);

drivers/media/video/pwc/pwc-if.c

@@ -386,7 +386,7 @@ static int pwc_isoc_init(struct pwc_device *pdev)
 	/* We first try with low compression and then retry with a higher
 	   compression setting if there is not enough bandwidth. */
 	ret = pwc_set_video_mode(pdev, pdev->width, pdev->height,
-				 pdev->vframes, &compression);
+				 pdev->pixfmt, pdev->vframes, &compression);
 
 	/* Get the current alternate interface, adjust packet size */
 	intf = usb_ifnum_to_if(udev, 0);
@@ -1128,7 +1128,8 @@ static int usb_pwc_probe(struct usb_interface *intf, const struct usb_device_id
 	pwc_set_leds(pdev, 0, 0);
 
 	/* Setup intial videomode */
-	rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT, 30, &compression);
+	rc = pwc_set_video_mode(pdev, MAX_WIDTH, MAX_HEIGHT,
+				V4L2_PIX_FMT_YUV420, 30, &compression);
 	if (rc)
 		goto err_free_mem;
 

drivers/media/video/pwc/pwc-misc.c

@@ -90,5 +90,4 @@ void pwc_construct(struct pwc_device *pdev)
 		pdev->frame_header_size = 0;
 		pdev->frame_trailer_size = 0;
 	}
-	pdev->pixfmt = V4L2_PIX_FMT_YUV420; /* default */
 }

drivers/media/video/pwc/pwc-v4l.c

@@ -493,16 +493,11 @@ static int pwc_s_fmt_vid_cap(struct file *file, void *fh, struct v4l2_format *f)
 			(pixelformat>>24)&255);
 
 	ret = pwc_set_video_mode(pdev, f->fmt.pix.width, f->fmt.pix.height,
-				 30, &compression);
+				 pixelformat, 30, &compression);
 
 	PWC_DEBUG_IOCTL("pwc_set_video_mode(), return=%d\n", ret);
 
-	if (ret == 0) {
-		pdev->pixfmt = pixelformat;
-		pwc_vidioc_fill_fmt(f, pdev->width, pdev->height,
-				    pdev->pixfmt);
-	}
-
+	pwc_vidioc_fill_fmt(f, pdev->width, pdev->height, pdev->pixfmt);
 leave:
 	mutex_unlock(&pdev->udevlock);
 	return ret;
@@ -1141,8 +1136,8 @@ static int pwc_s_parm(struct file *file, void *fh,
 		goto leave;
 	}
 
-	ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, fps,
-				 &compression);
+	ret = pwc_set_video_mode(pdev, pdev->width, pdev->height, pdev->pixfmt,
+				 fps, &compression);
 
 	pwc_g_parm(file, fh, parm);
 

drivers/media/video/pwc/pwc.h

@@ -369,7 +369,7 @@ void pwc_construct(struct pwc_device *pdev);
 /** Functions in pwc-ctrl.c */
 /* Request a certain video mode. Returns < 0 if not possible */
 extern int pwc_set_video_mode(struct pwc_device *pdev, int width, int height,
-			      int frames, int *compression);
+			      int pixfmt, int frames, int *compression);
 extern unsigned int pwc_get_fps(struct pwc_device *pdev, unsigned int index, unsigned int size);
 extern int pwc_set_leds(struct pwc_device *pdev, int on_value, int off_value);
 extern int pwc_get_cmos_sensor(struct pwc_device *pdev, int *sensor);