linux-kernel - Re: [PATCH 1/6] media: vsp1: Remove artificial pixel limitation

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Date:   Fri, 14 Sep 2018 11:51:44 +0100
From:   Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] media: vsp1: Remove artificial pixel limitation

On 14/09/18 11:47, Laurent Pinchart wrote:
> Hi Kieran,
> 
> Would you mind changing the patch subject to "Remove artificial minimum width/
> height limitation" ?

Not at all.

> 
> On Friday, 14 September 2018 13:23:04 EEST Laurent Pinchart wrote:
>> On Friday, 31 August 2018 17:40:39 EEST Kieran Bingham wrote:
>>> The VSP1 has a minimum width and height of a single pixel, with the
>>> exception of pixel formats with sub-sampling.
>>>
>>> Remove the artificial minimum width and minimum height limitation, and
>>> instead clamp the minimum dimensions based upon the sub-sampling
>>> parameter of that dimension.
>>>
>>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
>>
>> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>>
>> and applied to my tree.

Would you like me to resend the patch ?

--
Regards

Kieran


>>
>>> ---
>>>
>>>  drivers/media/platform/vsp1/vsp1_video.c | 7 ++-----
>>>  1 file changed, 2 insertions(+), 5 deletions(-)
>>>
>>> diff --git a/drivers/media/platform/vsp1/vsp1_video.c
>>> b/drivers/media/platform/vsp1/vsp1_video.c index
>>> 81d47a09d7bc..e78eadd0295b
>>> 100644
>>> --- a/drivers/media/platform/vsp1/vsp1_video.c
>>> +++ b/drivers/media/platform/vsp1/vsp1_video.c
>>> @@ -38,9 +38,7 @@
>>>
>>>  #define VSP1_VIDEO_DEF_WIDTH		1024
>>>  #define VSP1_VIDEO_DEF_HEIGHT		768
>>>
>>> -#define VSP1_VIDEO_MIN_WIDTH		2U
>>>
>>>  #define VSP1_VIDEO_MAX_WIDTH		8190U
>>>
>>> -#define VSP1_VIDEO_MIN_HEIGHT		2U
>>>
>>>  #define VSP1_VIDEO_MAX_HEIGHT		8190U
>>>  
>>>  /*
>>>
>>> --------------------------------------------------------------------------
>>> -
>>> -- @@ -136,9 +134,8 @@ static int __vsp1_video_try_format(struct
>>> vsp1_video
>>> *video, height = round_down(height, info->vsub);
>>>
>>>  	/* Clamp the width and height. */
>>>
>>> -	pix->width = clamp(width, VSP1_VIDEO_MIN_WIDTH, VSP1_VIDEO_MAX_WIDTH);
>>> -	pix->height = clamp(height, VSP1_VIDEO_MIN_HEIGHT,
>>> -			    VSP1_VIDEO_MAX_HEIGHT);
>>> +	pix->width = clamp(width, info->hsub, VSP1_VIDEO_MAX_WIDTH);
>>> +	pix->height = clamp(height, info->vsub, VSP1_VIDEO_MAX_HEIGHT);
>>>
>>>  	/*
>>>  	
>>>  	 * Compute and clamp the stride and image size. While not documented in
> 
>