linux-kernel - [PATCH v2 08/11] venus: vdec: allow bigger sizeimage set by clients

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Date:   Fri, 28 Jun 2019 15:59:59 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Vikash Garodia <vgarodia@...eaurora.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH v2 08/11] venus: vdec: allow bigger sizeimage set by clients

In most of the cases the client will know better what could be
the maximum size for compressed data buffers. Change the driver
to permit the user to set bigger size for the compressed buffer
but make reasonable sanitation.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 drivers/media/platform/qcom/venus/vdec.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index e1f998656c07..fb9afee76793 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -133,6 +133,7 @@ vdec_try_fmt_common(struct venus_inst *inst, struct v4l2_format *f)
 	struct v4l2_pix_format_mplane *pixmp = &f->fmt.pix_mp;
 	struct v4l2_plane_pix_format *pfmt = pixmp->plane_fmt;
 	const struct venus_format *fmt;
+	u32 szimage;
 
 	memset(pfmt[0].reserved, 0, sizeof(pfmt[0].reserved));
 	memset(pixmp->reserved, 0, sizeof(pixmp->reserved));
@@ -161,14 +162,17 @@ vdec_try_fmt_common(struct venus_inst *inst, struct v4l2_format *f)
 	pixmp->num_planes = fmt->num_planes;
 	pixmp->flags = 0;
 
-	pfmt[0].sizeimage = venus_helper_get_framesz(pixmp->pixelformat,
-						     pixmp->width,
-						     pixmp->height);
+	szimage = venus_helper_get_framesz(pixmp->pixelformat, pixmp->width,
+					   pixmp->height);
 
-	if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+	if (f->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
+		pfmt[0].sizeimage = szimage;
 		pfmt[0].bytesperline = ALIGN(pixmp->width, 128);
-	else
+	} else {
+		pfmt[0].sizeimage = clamp_t(u32, pfmt[0].sizeimage, 0, SZ_8M);
+		pfmt[0].sizeimage = max(pfmt[0].sizeimage, szimage);
 		pfmt[0].bytesperline = 0;
+	}
 
 	return fmt;
 }
@@ -266,6 +270,7 @@ static int vdec_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
 		inst->ycbcr_enc = pixmp->ycbcr_enc;
 		inst->quantization = pixmp->quantization;
 		inst->xfer_func = pixmp->xfer_func;
+		inst->input_buf_size = pixmp->plane_fmt[0].sizeimage;
 	}
 
 	memset(&format, 0, sizeof(format));
@@ -728,6 +733,7 @@ static int vdec_queue_setup(struct vb2_queue *q,
 		sizes[0] = venus_helper_get_framesz(inst->fmt_out->pixfmt,
 						    inst->out_width,
 						    inst->out_height);
+		sizes[0] = max(sizes[0], inst->input_buf_size);
 		inst->input_buf_size = sizes[0];
 		*num_buffers = max(*num_buffers, in_num);
 		inst->num_input_bufs = *num_buffers;
-- 
2.17.1