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Subject: media: staging: rkisp1: rsz: remove redundant if statement and add
inline doc
Author: Dafna Hirschfeld <dafna.hirschf...@collabora.com>
Date: Sun Apr 12 14:05:02 2020 +0200
The statement "if (rsz->fmt_type == V4L2_PIXEL_ENC_YUV)"
can be removed since the value of rsz->fmt_type is either
V4L2_PIXEL_ENC_YUV or V4L2_PIXEL_ENC_BAYER and the function
returns if it is bayer. In addition some doc with clarification
is added.
Signed-off-by: Dafna Hirschfeld <dafna.hirschf...@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
drivers/staging/media/rkisp1/rkisp1-resizer.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
---
diff --git a/drivers/staging/media/rkisp1/rkisp1-resizer.c
b/drivers/staging/media/rkisp1/rkisp1-resizer.c
index 84f23a91b0a0..c28919b9af44 100644
--- a/drivers/staging/media/rkisp1/rkisp1-resizer.c
+++ b/drivers/staging/media/rkisp1/rkisp1-resizer.c
@@ -365,12 +365,17 @@ static void rkisp1_rsz_config(struct rkisp1_resizer *rsz,
struct v4l2_rect sink_y, sink_c, src_y, src_c;
struct v4l2_mbus_framefmt *src_fmt;
struct v4l2_rect *sink_crop;
+ struct rkisp1_capture *cap = &rsz->rkisp1->capture_devs[rsz->id];
sink_crop = rkisp1_rsz_get_pad_crop(rsz, NULL, RKISP1_RSZ_PAD_SINK,
V4L2_SUBDEV_FORMAT_ACTIVE);
src_fmt = rkisp1_rsz_get_pad_fmt(rsz, NULL, RKISP1_RSZ_PAD_SRC,
V4L2_SUBDEV_FORMAT_ACTIVE);
+ /*
+ * The resizer only works on yuv formats,
+ * so return if it is bayer format.
+ */
if (rsz->pixel_enc == V4L2_PIXEL_ENC_BAYER) {
rkisp1_rsz_disable(rsz, when);
return;
@@ -384,13 +389,15 @@ static void rkisp1_rsz_config(struct rkisp1_resizer *rsz,
sink_c.width = sink_y.width / RKISP1_MBUS_FMT_HDIV;
sink_c.height = sink_y.height / RKISP1_MBUS_FMT_VDIV;
- if (rsz->pixel_enc == V4L2_PIXEL_ENC_YUV) {
- struct rkisp1_capture *cap =
- &rsz->rkisp1->capture_devs[rsz->id];
+ /*
+ * The resizer is used not only to change the dimensions of the frame
+ * but also to change the scale for YUV formats,
+ * (4:2:2 -> 4:2:0 for example). So the width/height of the CbCr
+ * streams should be set according to the pixel format in the capture.
+ */
+ hdiv = cap->pix.info->hdiv;
+ vdiv = cap->pix.info->vdiv;
- hdiv = cap->pix.info->hdiv;
- vdiv = cap->pix.info->vdiv;
- }
src_c.width = src_y.width / hdiv;
src_c.height = src_y.height / vdiv;
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