[PATCH] media: imx-jpeg: Drop the first error frames

[ming . qian]

From: Ming Qian <ming.qian@xxxxxxxxxxx>

When an output buffer contains error frame header,
v4l2_jpeg_parse_header() will return error, then driver will mark this
buffer and a capture buffer done with error flag in device_run().

But if the error occurs in the first frames, before setup the capture
queue, there is no chance to schedule device_run(), and there may be no
capture to mark error.

So we need to drop this buffer with error flag, and make the decoding
can continue.

Signed-off-by: Ming Qian <ming.qian@xxxxxxxxxxx>
---
 drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
index 1221b309a916..0e6ee997284b 100644
--- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
+++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c
@@ -1921,6 +1921,15 @@ static void mxc_jpeg_buf_queue(struct vb2_buffer *vb)
 	if (ret)
 		jpeg_src_buf->jpeg_parse_error = true;
 
+	/*
+	 * if the capture queue is not setup, the device_run() won't be scheduled,
+	 * need to drop the error buffer, so that the decoding can continue
+	 */
+	if (jpeg_src_buf->jpeg_parse_error &&
+	    !vb2_is_streaming(v4l2_m2m_get_dst_vq(ctx->fh.m2m_ctx))) {
+		v4l2_m2m_buf_done(vbuf, VB2_BUF_STATE_ERROR);
+		return;
+	}
 end:
 	v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
 }
-- 
2.43.0-rc1