Re: media/master bisection: v4l2-compliance-vivid.Format-ioctls-Input-3.VIDIOC_TRY_FMT on qemu_arm-virt-gicv3

From: Guillaume Tucker
Date: Wed Sep 30 2020 - 04:05:49 EST

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Please see the bisection report below about a regression in
v4l2-compliance on vivid.

Reports aren't automatically sent to the public while we're
trialing new bisection features on kernelci.org but this one
looks valid.

The full results for v4l2-compliance on vivid for
v5.9-rc4-471-gc0c8db7bc953 show 22 individual test case
regressions which might all be due to a single issue:

https://kernelci.org/test/plan/id/5f728c108b008d61f4bf9db7/

For comparison, this is the results from the previous revision in
the media tree:

https://kernelci.org/test/plan/id/5f6b44ddea4abb1888bf9db4/

Also worth noting is that the v4l2-compliance test suite was
updated on Friday 25th, in-between the revisions mentioned above.
So the issue might have been present earlier but not detected.

Hope this helps!

Thanks,
Guillaume

On 29/09/2020 07:30, KernelCI bot wrote:
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
> * This automated bisection report was sent to you on the basis *
> * that you may be involved with the breaking commit it has *
> * found. No manual investigation has been done to verify it, *
> * and the root cause of the problem may be somewhere else. *
> * *
> * If you do send a fix, please include this trailer: *
> * Reported-by: "kernelci.org bot" <bot@xxxxxxxxxxxx> *
> * *
> * Hope this helps! *
> * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
>
> media/master bisection: v4l2-compliance-vivid.Format-ioctls-Input-3.VIDIOC_TRY_FMT on qemu_arm-virt-gicv3
>
> Summary:
> Start: c0c8db7bc953 media: MAINTAINERS: remove Maxime Jourdan as maintainer of Amlogic VDEC
> Plain log: https://storage.kernelci.org/media/master/v5.9-rc4-471-gc0c8db7bc953/arm/multi_v7_defconfig+virtualvideo/gcc-8/lab-collabora/v4l2-compliance-vivid-qemu_arm-virt-gicv3.txt
> HTML log: https://storage.kernelci.org/media/master/v5.9-rc4-471-gc0c8db7bc953/arm/multi_v7_defconfig+virtualvideo/gcc-8/lab-collabora/v4l2-compliance-vivid-qemu_arm-virt-gicv3.html
> Result: 2f491463497a media: vivid: Add support to the CSC API
>
> Checks:
> revert: PASS
> verify: PASS
>
> Parameters:
> Tree: media
> URL: https://git.linuxtv.org/media_tree.git
> Branch: master
> Target: qemu_arm-virt-gicv3
> CPU arch: arm
> Lab: lab-collabora
> Compiler: gcc-8
> Config: multi_v7_defconfig+virtualvideo
> Test case: v4l2-compliance-vivid.Format-ioctls-Input-3.VIDIOC_TRY_FMT
>
> Breaking commit found:
>
> -------------------------------------------------------------------------------
> commit 2f491463497ad43bc06968a334747c6b6b20fc74
> Author: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
> Date: Thu Aug 27 21:46:09 2020 +0200
>
> media: vivid: Add support to the CSC API
>
> The CSC API (Colorspace conversion) allows userspace to try
> to configure the colorspace, transfer function, Y'CbCr/HSV encoding
> and the quantization for capture devices. This patch adds support
> to the CSC API in vivid.
> Using the CSC API, userspace is allowed to do the following:
>
> - Set the colorspace.
> - Set the xfer_func.
> - Set the ycbcr_enc function for YUV formats.
> - Set the hsv_enc function for HSV formats
> - Set the quantization for YUV and RGB formats.
>
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
> Signed-off-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
>
> diff --git a/drivers/media/test-drivers/vivid/vivid-vid-cap.c b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
> index e94beef008c8..eadf28ab1e39 100644
> --- a/drivers/media/test-drivers/vivid/vivid-vid-cap.c
> +++ b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
> @@ -560,6 +560,7 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
> unsigned factor = 1;
> unsigned w, h;
> unsigned p;
> + bool user_set_csc = !!(mp->flags & V4L2_PIX_FMT_FLAG_SET_CSC);
>
> fmt = vivid_get_format(dev, mp->pixelformat);
> if (!fmt) {
> @@ -633,13 +634,30 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
> (fmt->bit_depth[p] / fmt->vdownsampling[p])) /
> (fmt->bit_depth[0] / fmt->vdownsampling[0]);
>
> - mp->colorspace = vivid_colorspace_cap(dev);
> - if (fmt->color_enc == TGP_COLOR_ENC_HSV)
> - mp->hsv_enc = vivid_hsv_enc_cap(dev);
> - else
> + if (!user_set_csc || !v4l2_is_colorspace_valid(mp->colorspace))
> + mp->colorspace = vivid_colorspace_cap(dev);
> +
> + if (!user_set_csc || !v4l2_is_xfer_func_valid(mp->xfer_func))
> + mp->xfer_func = vivid_xfer_func_cap(dev);
> +
> + if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
> + if (!user_set_csc || !v4l2_is_hsv_enc_valid(mp->hsv_enc))
> + mp->hsv_enc = vivid_hsv_enc_cap(dev);
> + } else if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
> + if (!user_set_csc || !v4l2_is_ycbcr_enc_valid(mp->ycbcr_enc))
> + mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
> + } else {
> mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
> - mp->xfer_func = vivid_xfer_func_cap(dev);
> - mp->quantization = vivid_quantization_cap(dev);
> + }
> +
> + if (fmt->color_enc == TGP_COLOR_ENC_YCBCR ||
> + fmt->color_enc == TGP_COLOR_ENC_RGB) {
> + if (!user_set_csc || !v4l2_is_quant_valid(mp->quantization))
> + mp->quantization = vivid_quantization_cap(dev);
> + } else {
> + mp->quantization = vivid_quantization_cap(dev);
> + }
> +
> memset(mp->reserved, 0, sizeof(mp->reserved));
> return 0;
> }
> @@ -769,6 +787,14 @@ int vivid_s_fmt_vid_cap(struct file *file, void *priv,
> if (vivid_is_sdtv_cap(dev))
> dev->tv_field_cap = mp->field;
> tpg_update_mv_step(&dev->tpg);
> + dev->tpg.colorspace = mp->colorspace;
> + dev->tpg.xfer_func = mp->xfer_func;
> + if (dev->fmt_cap->color_enc == TGP_COLOR_ENC_YCBCR)
> + dev->tpg.ycbcr_enc = mp->ycbcr_enc;
> + else
> + dev->tpg.hsv_enc = mp->hsv_enc;
> + dev->tpg.quantization = mp->quantization;
> +
> return 0;
> }
>
> diff --git a/drivers/media/test-drivers/vivid/vivid-vid-common.c b/drivers/media/test-drivers/vivid/vivid-vid-common.c
> index 76b0be670ebb..19701fe72030 100644
> --- a/drivers/media/test-drivers/vivid/vivid-vid-common.c
> +++ b/drivers/media/test-drivers/vivid/vivid-vid-common.c
> @@ -920,6 +920,31 @@ int vivid_enum_fmt_vid(struct file *file, void *priv,
> fmt = &vivid_formats[f->index];
>
> f->pixelformat = fmt->fourcc;
> +
> + if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
> + f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
> + return 0;
> + /*
> + * For capture devices, we support the CSC API.
> + * We allow userspace to:
> + * 1. set the colorspace
> + * 2. set the xfer_func
> + * 3. set the ycbcr_enc on YUV formats
> + * 4. set the hsv_enc on HSV formats
> + * 5. set the quantization on YUV and RGB formats
> + */
> + f->flags |= V4L2_FMT_FLAG_CSC_COLORSPACE;
> + f->flags |= V4L2_FMT_FLAG_CSC_XFER_FUNC;
> +
> + if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
> + f->flags |= V4L2_FMT_FLAG_CSC_YCBCR_ENC;
> + f->flags |= V4L2_FMT_FLAG_CSC_QUANTIZATION;
> + } else if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
> + f->flags |= V4L2_FMT_FLAG_CSC_HSV_ENC;
> + } else if (fmt->color_enc == TGP_COLOR_ENC_RGB) {
> + f->flags |= V4L2_FMT_FLAG_CSC_QUANTIZATION;
> + }
> +
> return 0;
> }
>
> diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
> index 150ee16ebd81..a3083529b698 100644
> --- a/include/media/v4l2-common.h
> +++ b/include/media/v4l2-common.h
> @@ -539,4 +539,33 @@ static inline void v4l2_buffer_set_timestamp(struct v4l2_buffer *buf,
> buf->timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
> }
>
> +static inline bool v4l2_is_colorspace_valid(__u32 colorspace)
> +{
> + return colorspace > V4L2_COLORSPACE_DEFAULT &&
> + colorspace <= V4L2_COLORSPACE_DCI_P3;
> +}
> +
> +static inline bool v4l2_is_xfer_func_valid(__u32 xfer_func)
> +{
> + return xfer_func > V4L2_XFER_FUNC_DEFAULT &&
> + xfer_func <= V4L2_XFER_FUNC_SMPTE2084;
> +}
> +
> +static inline bool v4l2_is_ycbcr_enc_valid(__u8 ycbcr_enc)
> +{
> + return ycbcr_enc > V4L2_YCBCR_ENC_DEFAULT &&
> + ycbcr_enc <= V4L2_YCBCR_ENC_SMPTE240M;
> +}
> +
> +static inline bool v4l2_is_hsv_enc_valid(__u8 hsv_enc)
> +{
> + return hsv_enc == V4L2_HSV_ENC_180 || hsv_enc == V4L2_HSV_ENC_256;
> +}
> +
> +static inline bool v4l2_is_quant_valid(__u8 quantization)
> +{
> + return quantization == V4L2_QUANTIZATION_FULL_RANGE ||
> + quantization == V4L2_QUANTIZATION_LIM_RANGE;
> +}
> +
> #endif /* V4L2_COMMON_H_ */
> -------------------------------------------------------------------------------
>
>
> Git bisection log:
>
> -------------------------------------------------------------------------------
> git bisect start
> # good: [01cc2ec6ea044731e939e5e47f7e115b86f49465] media: atomisp: cleanup __printf() atributes on printk messages
> git bisect good 01cc2ec6ea044731e939e5e47f7e115b86f49465
> # bad: [c0c8db7bc95397f32fe60ff8b07c746a69fb22de] media: MAINTAINERS: remove Maxime Jourdan as maintainer of Amlogic VDEC
> git bisect bad c0c8db7bc95397f32fe60ff8b07c746a69fb22de
> # bad: [aaffa0126a111d65f4028c503c76192d4cc93277] media: rcar-vin: Fix a reference count leak.
> git bisect bad aaffa0126a111d65f4028c503c76192d4cc93277
> # bad: [25d8cf786d34b5167f2c01e092eeedcb0ae58628] media: staging: rkisp1: rsz: set flags to 0 in enum_mbus_code cb
> git bisect bad 25d8cf786d34b5167f2c01e092eeedcb0ae58628
> # good: [327296920f9dedfc6ba4ef8f5a686c9667c65f38] media: mtk-vcodec: venc: set OUTPUT buffers field to V4L2_FIELD_NONE
> git bisect good 327296920f9dedfc6ba4ef8f5a686c9667c65f38
> # good: [21d387b8d372f859d9e87fdcc7c3b4a432737f4d] media: mx2_emmaprp: Fix memleak in emmaprp_probe
> git bisect good 21d387b8d372f859d9e87fdcc7c3b4a432737f4d
> # good: [b38c73ca1c213bbf8a872b334a6bb835becfaba5] media: v4l2: add support for colorspace conversion API (CSC) for video capture
> git bisect good b38c73ca1c213bbf8a872b334a6bb835becfaba5
> # bad: [62aacfa9bf93f94f6949338e0c7a2ed4c4bd2c2a] media: v4l2: extend the CSC API to subdevice.
> git bisect bad 62aacfa9bf93f94f6949338e0c7a2ed4c4bd2c2a
> # bad: [2f491463497ad43bc06968a334747c6b6b20fc74] media: vivid: Add support to the CSC API
> git bisect bad 2f491463497ad43bc06968a334747c6b6b20fc74
> # first bad commit: [2f491463497ad43bc06968a334747c6b6b20fc74] media: vivid: Add support to the CSC API
> -------------------------------------------------------------------------------
>
>
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