linux-kernel - Re: [PATCH v2] media: venus: add support for selection rectangles

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Date:   Fri, 09 Nov 2018 09:20:43 +0000
From:   mgottam@...eaurora.org
To:     Tomasz Figa <tfiga@...omium.org>
Cc:     Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        vgarodia@...eaurora.org
Subject: Re: [PATCH v2] media: venus: add support for selection rectangles

On 2018-11-09 07:56, Tomasz Figa wrote:
> Hi Malathi,
> 
> On Fri, Nov 9, 2018 at 4:39 PM Malathi Gottam <mgottam@...eaurora.org> 
> wrote:
>> 
>> Handles target type crop by setting the new active rectangle
>> to hardware. The new rectangle should be within YUV size.
>> 
>> Signed-off-by: Malathi Gottam <mgottam@...eaurora.org>
>> ---
>>  drivers/media/platform/qcom/venus/venc.c | 26 
>> ++++++++++++++++++++++----
>>  1 file changed, 22 insertions(+), 4 deletions(-)
>> 
>> diff --git a/drivers/media/platform/qcom/venus/venc.c 
>> b/drivers/media/platform/qcom/venus/venc.c
>> index ce85962..d26c129 100644
>> --- a/drivers/media/platform/qcom/venus/venc.c
>> +++ b/drivers/media/platform/qcom/venus/venc.c
>> @@ -478,16 +478,34 @@ static int venc_g_fmt(struct file *file, void 
>> *fh, struct v4l2_format *f)
>>  venc_s_selection(struct file *file, void *fh, struct v4l2_selection 
>> *s)
>>  {
>>         struct venus_inst *inst = to_inst(file);
>> +       int ret;
>> +       u32 buftype;
>> 
>>         if (s->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
>>                 return -EINVAL;
>> 
>>         switch (s->target) {
>>         case V4L2_SEL_TGT_CROP:
>> -               if (s->r.width != inst->out_width ||
>> -                   s->r.height != inst->out_height ||
>> -                   s->r.top != 0 || s->r.left != 0)
>> -                       return -EINVAL;
>> +               if (s->r.left != 0) {
>> +                       s->r.width += s->r.left;
>> +                       s->r.left = 0;
>> +               }
>> +
>> +               if (s->r.top != 0) {
>> +                       s->r.height += s->r.top;
>> +                       s->r.top = 0;
>> +               }
>> +
>> +               if (s->r.width > inst->width)
>> +                       s->r.width = inst->width;
>> +               else
>> +                       inst->width = s->r.width;
>> +
>> +               if (s->r.height > inst->height)
>> +                       s->r.height = inst->height;
>> +               else
>> +                       inst->height = s->r.height;
>> +
> 
> From semantic point of view, it looks fine, but where is the rectangle
> actually set to the hardware?
> 
> Best regards,
> Tomasz

As this set selection call occurs before the hfi session initialization,
for now we are holding these values in driver.

As this call is followed by VIDIOC_REQBUFS(), as a part of this
we have venc_init_session

static int venc_init_session(struct venus_inst *inst)
{
	int ret;

	ret = hfi_session_init(inst, inst->fmt_cap->pixfmt);
	if (ret)
		return ret;

	ret = venus_helper_set_input_resolution(inst, inst->width,
						inst->height);
	if (ret)
		goto deinit;

	ret = venus_helper_set_output_resolution(inst, inst->width,
						 inst->height,
						 HFI_BUFFER_OUTPUT);
	if (ret)
		goto deinit;

	ret = venus_helper_set_color_format(inst, inst->fmt_out->pixfmt);
	if (ret)
		goto deinit;

	ret = venc_set_properties(inst);


 From here we set these values to hardware.