media: venus: venc,vdec: Return EBUSY on S_FMT while streaming

According to the v4l spec s_fmt must return EBUSY while the
particular queue is streaming. Add such check in encoder and
decoder s_fmt methods.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/qcom/venus/vdec.c

@@ -276,6 +276,14 @@ static int vdec_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 	const struct venus_format *fmt;
 	struct v4l2_format format;
 	u32 pixfmt_out = 0, pixfmt_cap = 0;
+	struct vb2_queue *q;
+
+	q = v4l2_m2m_get_vq(inst->m2m_ctx, f->type);
+	if (!q)
+		return -EINVAL;
+
+	if (vb2_is_busy(q))
+		return -EBUSY;
 
 	orig_pixmp = *pixmp;
 

drivers/media/platform/qcom/venus/venc.c

@@ -357,6 +357,14 @@ static int venc_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 	const struct venus_format *fmt;
 	struct v4l2_format format;
 	u32 pixfmt_out = 0, pixfmt_cap = 0;
+	struct vb2_queue *q;
+
+	q = v4l2_m2m_get_vq(inst->m2m_ctx, f->type);
+	if (!q)
+		return -EINVAL;
+
+	if (vb2_is_busy(q))
+		return -EBUSY;
 
 	orig_pixmp = *pixmp;