linux-kernel - Re: [PATCH v4 11/28] media: iris: implement g

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Message-ID: <c841e94e-0468-5863-9cb1-403b83c3510d@quicinc.com>
Date: Wed, 23 Oct 2024 17:01:01 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Hans Verkuil <hverkuil@...all.nl>,
        Vikash Garodia
	<quic_vgarodia@...cinc.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        "Mauro Carvalho Chehab" <mchehab@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC: Sebastian Fricke <sebastian.fricke@...labora.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Vedang Nagar
	<quic_vnagar@...cinc.com>
Subject: Re: [PATCH v4 11/28] media: iris: implement g_selection ioctl



On 10/23/2024 4:15 PM, Hans Verkuil wrote:
> On 14/10/2024 11:07, Dikshita Agarwal wrote:
>> From: Vedang Nagar <quic_vnagar@...cinc.com>
>>
>> Implement g_selection ioctl in the driver with necessary hooks.
>>
>> Signed-off-by: Vedang Nagar <quic_vnagar@...cinc.com>
>> Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
>> ---
>>  drivers/media/platform/qcom/iris/iris_vidc.c | 29 ++++++++++++++++++++++++++++
>>  1 file changed, 29 insertions(+)
>>
>> diff --git a/drivers/media/platform/qcom/iris/iris_vidc.c b/drivers/media/platform/qcom/iris/iris_vidc.c
>> index 05146970189b..481fa0a7b7f3 100644
>> --- a/drivers/media/platform/qcom/iris/iris_vidc.c
>> +++ b/drivers/media/platform/qcom/iris/iris_vidc.c
>> @@ -256,6 +256,34 @@ static int iris_g_fmt_vid_mplane(struct file *filp, void *fh, struct v4l2_format
>>  	return ret;
>>  }
>>  
>> +static int iris_g_selection(struct file *filp, void *fh, struct v4l2_selection *s)
>> +{
>> +	struct iris_inst *inst = iris_get_inst(filp, NULL);
>> +
>> +	if (s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE &&
> 
> For g/s_selection the MPLANE type will always be mapped to the non-mplane type,
> so you'll never see V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE here.
> 
> See v4l_g/s_selection in v4l2-core/v4l2-ioctl.c.
> 
> It's a bit of an historical artifact.
> 
I see, Will remove the check for MPLANE then and keep only for
V4L2_BUF_TYPE_VIDEO_CAPTURE.

Thanks,
Dikshita
>> +	    s->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
>> +		return -EINVAL;
>> +
>> +	switch (s->target) {
>> +	case V4L2_SEL_TGT_CROP_BOUNDS:
>> +	case V4L2_SEL_TGT_CROP_DEFAULT:
>> +	case V4L2_SEL_TGT_CROP:
>> +	case V4L2_SEL_TGT_COMPOSE_BOUNDS:
>> +	case V4L2_SEL_TGT_COMPOSE_PADDED:
>> +	case V4L2_SEL_TGT_COMPOSE_DEFAULT:
>> +	case V4L2_SEL_TGT_COMPOSE:
>> +		s->r.left = inst->crop.left;
>> +		s->r.top = inst->crop.top;
>> +		s->r.width = inst->crop.width;
>> +		s->r.height = inst->crop.height;
>> +		break;
>> +	default:
>> +		return -EINVAL;
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>>  static struct v4l2_file_operations iris_v4l2_file_ops = {
>>  	.owner                          = THIS_MODULE,
>>  	.open                           = iris_open,
>> @@ -277,6 +305,7 @@ static const struct v4l2_ioctl_ops iris_v4l2_ioctl_ops = {
>>  	.vidioc_g_fmt_vid_cap_mplane    = iris_g_fmt_vid_mplane,
>>  	.vidioc_g_fmt_vid_out_mplane    = iris_g_fmt_vid_mplane,
>>  	.vidioc_reqbufs                 = v4l2_m2m_ioctl_reqbufs,
>> +	.vidioc_g_selection             = iris_g_selection,
>>  };
>>  
>>  void iris_init_ops(struct iris_core *core)
>>
> 
> Regards,
> 
> 	Hans