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* [PATCH] venus: vdec: update output buffer size during vdec_s_fmt()
@ 2021-08-25  8:44 Mansur Alisha Shaik
  2021-08-25 23:11 ` Nathan Hebert
  0 siblings, 1 reply; 2+ messages in thread
From: Mansur Alisha Shaik @ 2021-08-25  8:44 UTC (permalink / raw)
  To: linux-media, stanimir.varbanov
  Cc: linux-kernel, linux-arm-msm, vgarodia, dikshita, nhebert,
	Mansur Alisha Shaik

Video driver maintains an internal context for the output buffer size.
During S_fmt() on capture plane, the output buffer size is not updated
in driver context. As a result, during buf_prepare(), the size of the
vb2_plane and internal size of the buffer, as maintained by the driver,
does not match. This leads to buf_prepare() failure.
Update the instance context for the output buffer size during s_fmt().

Signed-off-by: Mansur Alisha Shaik <>
 drivers/media/platform/qcom/venus/vdec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 198e47eb63f4..c129b061a325 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -332,8 +332,11 @@ static int vdec_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 		inst->fmt_out = fmt;
-	else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+	else if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
 		inst->fmt_cap = fmt;
+		inst->output2_buf_size =
+			venus_helper_get_framesz(pixfmt_cap, orig_pixmp.width, orig_pixmp.height);
+	}
 	return 0;
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member 
of Code Aurora Forum, hosted by The Linux Foundation

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2021-08-25  8:44 [PATCH] venus: vdec: update output buffer size during vdec_s_fmt() Mansur Alisha Shaik
2021-08-25 23:11 ` Nathan Hebert

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