V4L/DVB (9894): cx18: Use a known open task handle when setting stream CX2341x parameters

cx18: Use a known open task handle when setting stream CX2341x parameters
Sometimes, we might only have VBI or YUV stream open instead of an MPEG stream.
Let's make sure we use a valid task handle to perform the CX2341x control
settings.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/cx18/cx18-controls.c

@@ -259,6 +259,7 @@ int cx18_s_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 		return err;
 	}
 	if (c->ctrl_class == V4L2_CTRL_CLASS_MPEG) {
+		struct cx18_api_func_private priv;
 		struct cx2341x_mpeg_params p = cx->params;
 		int err = cx2341x_ext_ctrls(&p, atomic_read(&cx->ana_capturing),
 						c, VIDIOC_S_EXT_CTRLS);
@@ -278,7 +279,9 @@ int cx18_s_ext_ctrls(struct file *file, void *fh, struct v4l2_ext_controls *c)
 			fmt.fmt.pix.height = cx->params.height;
 			cx18_av_cmd(cx, VIDIOC_S_FMT, &fmt);
 		}
-		err = cx2341x_update(cx, cx18_api_func, &cx->params, &p);
+		priv.cx = cx;
+		priv.s = &cx->streams[id->type];
+		err = cx2341x_update(&priv, cx18_api_func, &cx->params, &p);
 		if (!err && cx->params.stream_vbi_fmt != p.stream_vbi_fmt)
 			err = cx18_setup_vbi_fmt(cx, p.stream_vbi_fmt);
 		cx->params = p;

drivers/media/video/cx18/cx18-mailbox.c

@@ -606,8 +606,9 @@ static int cx18_set_filter_param(struct cx18_stream *s)
 int cx18_api_func(void *priv, u32 cmd, int in, int out,
 		u32 data[CX2341X_MBOX_MAX_DATA])
 {
-	struct cx18 *cx = priv;
-	struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_MPG];
+	struct cx18_api_func_private *api_priv = priv;
+	struct cx18 *cx = api_priv->cx;
+	struct cx18_stream *s = api_priv->s;
 
 	switch (cmd) {
 	case CX2341X_ENC_SET_OUTPUT_PORT:

drivers/media/video/cx18/cx18-mailbox.h

@@ -79,6 +79,13 @@ struct cx18_mailbox {
     u32       error;
 };
 
+struct cx18_stream;
+
+struct cx18_api_func_private {
+	struct cx18 *cx;
+	struct cx18_stream *s;
+};
+
 int cx18_api(struct cx18 *cx, u32 cmd, int args, u32 data[]);
 int cx18_vapi_result(struct cx18 *cx, u32 data[MAX_MB_ARGUMENTS], u32 cmd,
 		int args, ...);

drivers/media/video/cx18/cx18-streams.c

@@ -494,6 +494,8 @@ int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 	cx18_vapi(cx, CX18_CPU_SET_CHANNEL_TYPE, 2, s->handle, captype);
 
 	if (atomic_read(&cx->ana_capturing) == 0 && !ts) {
+		struct cx18_api_func_private priv;
+
 		/* Stuff from Windows, we don't know what it is */
 		cx18_vapi(cx, CX18_CPU_SET_VER_CROP_LINE, 2, s->handle, 0);
 		cx18_vapi(cx, CX18_CPU_SET_MISC_PARAMETERS, 3, s->handle, 3, 1);
@@ -513,7 +515,9 @@ int cx18_start_v4l2_encode_stream(struct cx18_stream *s)
 		cx18_vapi_result(cx, data, CX18_CPU_SET_INDEXTABLE, 1, 0);
 
 		/* Setup API for Stream */
-		cx2341x_update(cx, cx18_api_func, NULL, &cx->params);
+		priv.cx = cx;
+		priv.s = s;
+		cx2341x_update(&priv, cx18_api_func, NULL, &cx->params);
 	}
 
 	if (atomic_read(&cx->tot_capturing) == 0) {