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Subject: Re: media/master bisection:
 v4l2-compliance-vivid.Format-ioctls-Input-3.VIDIOC_TRY_FMT on
 qemu_arm-virt-gicv3
To:     Dafna Hirschfeld <dafna.hirschfeld@collabora.com>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
References: <5f72d499.1c69fb81.81d5b.6937@mx.google.com>
Cc:     linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        kernelci-results@groups.io
From:   Guillaume Tucker <guillaume.tucker@collabora.com>
Message-ID: <ebd6520a-85c3-c955-ee16-88e0c6995855@collabora.com>
Date:   Wed, 30 Sep 2020 09:05:42 +0100
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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@kernelci.org>          *
> *                                                               *
> * 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@collabora.com>
> 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@collabora.com>
>     Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
>     Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
> 
> 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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