linux-kernel - Re: [PATCH 2/2] venus: venc: fix handlig of S_SELECTION and G

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Date:   Thu, 1 Oct 2020 04:32:41 +0300
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     Tomasz Figa <tfiga@...omium.org>,
        Dikshita Agarwal <dikshita@...eaurora.org>
Cc:     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>,
        Vikash Garodia <vgarodia@...eaurora.org>
Subject: Re: [PATCH 2/2] venus: venc: fix handlig of S_SELECTION and
 G_SELECTION

Hi Tomasz,

On 9/25/20 11:55 PM, Tomasz Figa wrote:
> Hi Dikshita, Stanimir,
> 
> On Thu, Sep 24, 2020 at 7:31 PM Dikshita Agarwal
> <dikshita@...eaurora.org> wrote:
>>
>> From: Stanimir Varbanov <stanimir.varbanov@...aro.org>
>>
>> - return correct width and height for G_SELECTION
>> - if requested rectangle wxh doesn't match with capture port wxh
>>   adjust the rectangle to supported wxh.
>>
>> Signed-off-by: Dikshita Agarwal <dikshita@...eaurora.org>
>> ---
>>  drivers/media/platform/qcom/venus/venc.c | 20 ++++++++++++--------
>>  1 file changed, 12 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
>> index 7d2aaa8..a2cc12d 100644
>> --- a/drivers/media/platform/qcom/venus/venc.c
>> +++ b/drivers/media/platform/qcom/venus/venc.c
>> @@ -463,13 +463,13 @@ static int venc_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
>>         switch (s->target) {
>>         case V4L2_SEL_TGT_CROP_DEFAULT:
>>         case V4L2_SEL_TGT_CROP_BOUNDS:
>> -               s->r.width = inst->width;
>> -               s->r.height = inst->height;
>> -               break;
>> -       case V4L2_SEL_TGT_CROP:
>>                 s->r.width = inst->out_width;
>>                 s->r.height = inst->out_height;
>>                 break;
>> +       case V4L2_SEL_TGT_CROP:
>> +               s->r.width = inst->width;
>> +               s->r.height = inst->height;
>> +               break;
>>         default:
>>                 return -EINVAL;
>>         }inter
>> @@ -490,10 +490,14 @@ static int venc_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
>>
>>         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.width != inst->width ||
>> +                   s->r.height != inst->height ||
>> +                   s->r.top != 0 || s->r.left != 0) {
>> +                       s->r.top = 0;
>> +                       s->r.left = 0;
>> +                       s->r.width = inst->width;
>> +                       s->r.height = inst->height;
> 
> What's the point of exposing the selection API if no selection can
> actually be done?

If someone can guarantee that dropping of s_selection will not break
userspace applications I'm fine with removing it.

I implemented g/s_selection with the idea to add crop functionality
later because with current firmware interface it needs more work.

-- 
regards,
Stan