linux-kernel - [PATCH v3 3/5] media: imx-jpeg: Propagate the output frame size to the capture side

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Date:   Wed, 23 Mar 2022 17:05:56 +0800
From:   Ming Qian <ming.qian@....com>
To:     mchehab@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        mirela.rabulea@....nxp.com
Cc:     hverkuil-cisco@...all.nl, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v3 3/5] media: imx-jpeg: Propagate the output frame size to the capture side

The GStreamer v4l2videodec only ever calls S_FMT on the output side
and then expects G_FMT on the capture side to return a valid format.

Signed-off-by: Ming Qian <ming.qian@....com>
---
 .../media/platform/nxp/imx-jpeg/mxc-jpeg.c    | 30 ++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
index a95305639dd9..5dfa6f87871e 100644
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
@@ -1831,12 +1831,40 @@ static int mxc_jpeg_s_fmt_vid_out(struct file *file, void *priv,
 				  struct v4l2_format *f)
 {
 	int ret;
+	struct mxc_jpeg_ctx *ctx = mxc_jpeg_fh_to_ctx(priv);
+	struct vb2_queue *dst_vq;
+	struct mxc_jpeg_q_data *q_data_cap;
+	enum v4l2_buf_type cap_type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+	struct v4l2_format fc;
 
 	ret = mxc_jpeg_try_fmt_vid_out(file, priv, f);
 	if (ret)
 		return ret;
 
-	return mxc_jpeg_s_fmt(mxc_jpeg_fh_to_ctx(priv), f);
+	ret = mxc_jpeg_s_fmt(mxc_jpeg_fh_to_ctx(priv), f);
+	if (ret)
+		return ret;
+
+	if (ctx->mxc_jpeg->mode != MXC_JPEG_DECODE)
+		return 0;
+
+	dst_vq = v4l2_m2m_get_vq(ctx->fh.m2m_ctx, cap_type);
+	if (!dst_vq)
+		return -EINVAL;
+
+	if (vb2_is_busy(dst_vq))
+		return 0;
+
+	q_data_cap = mxc_jpeg_get_q_data(ctx, cap_type);
+	if (q_data_cap->w == f->fmt.pix_mp.width && q_data_cap->h == f->fmt.pix_mp.height)
+		return 0;
+	memset(&fc, 0, sizeof(fc));
+	fc.type = cap_type;
+	fc.fmt.pix_mp.pixelformat = q_data_cap->fmt->fourcc;
+	fc.fmt.pix_mp.width = f->fmt.pix_mp.width;
+	fc.fmt.pix_mp.height = f->fmt.pix_mp.height;
+
+	return mxc_jpeg_s_fmt_vid_cap(file, priv, &fc);
 }
 
 static int mxc_jpeg_g_fmt_vid(struct file *file, void *priv,
-- 
2.33.0