linux-kernel - Re: [PATCH v5 9/9] Input: sur40 - use new V4L2 touch input type

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Message-ID: <6bd45515-6c8f-fcd6-32c0-d6110fff49c5@xs4all.nl>
Date:	Mon, 27 Jun 2016 13:06:50 +0200
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Nick Dyer <nick.dyer@...ev.co.uk>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-media@...r.kernel.org,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	Benson Leung <bleung@...omium.org>,
	Alan Bowens <Alan.Bowens@...el.com>,
	Javier Martinez Canillas <javier@....samsung.com>,
	Chris Healy <cphealy@...il.com>,
	Henrik Rydberg <rydberg@...math.org>,
	Andrew Duggan <aduggan@...aptics.com>,
	James Chen <james.chen@....com.tw>,
	Dudley Du <dudl@...ress.com>,
	Andrew de los Reyes <adlr@...omium.org>,
	sheckylin@...omium.org, Peter Hutterer <peter.hutterer@...-t.net>,
	Florian Echtler <floe@...terbrot.org>, mchehab@....samsung.com
Subject: Re: [PATCH v5 9/9] Input: sur40 - use new V4L2 touch input type

On 06/23/2016 12:08 AM, Nick Dyer wrote:
> Signed-off-by: Nick Dyer <nick.dyer@...ev.co.uk>
> ---
>  drivers/input/touchscreen/sur40.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index 880c40b..841e045 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -599,7 +599,7 @@ static int sur40_probe(struct usb_interface *interface,
>  	sur40->vdev.queue = &sur40->queue;
>  	video_set_drvdata(&sur40->vdev, sur40);
>  
> -	error = video_register_device(&sur40->vdev, VFL_TYPE_GRABBER, -1);
> +	error = video_register_device(&sur40->vdev, VFL_TYPE_TOUCH, -1);
>  	if (error) {
>  		dev_err(&interface->dev,
>  			"Unable to register video subdevice.");
> @@ -763,7 +763,7 @@ static int sur40_vidioc_enum_input(struct file *file, void *priv,
>  {
>  	if (i->index != 0)
>  		return -EINVAL;
> -	i->type = V4L2_INPUT_TYPE_CAMERA;
> +	i->type = V4L2_INPUT_TYPE_TOUCH;
>  	i->std = V4L2_STD_UNKNOWN;
>  	strlcpy(i->name, "In-Cell Sensor", sizeof(i->name));
>  	i->capabilities = 0;
> @@ -794,7 +794,7 @@ static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
>  	if (f->index != 0)
>  		return -EINVAL;
>  	strlcpy(f->description, "8-bit greyscale", sizeof(f->description));
> -	f->pixelformat = V4L2_PIX_FMT_GREY;
> +	f->pixelformat = V4L2_TCH_FMT_TU08;

I suggest supporting both formats, with a note that support for GREY is needed for
backwards compatibility reasons.

Regards,

	Hans

>  	f->flags = 0;
>  	return 0;
>  }
> @@ -802,7 +802,7 @@ static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
>  static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
>  					struct v4l2_frmsizeenum *f)
>  {
> -	if ((f->index != 0) || (f->pixel_format != V4L2_PIX_FMT_GREY))
> +	if ((f->index != 0) || (f->pixel_format != V4L2_TCH_FMT_TU08))
>  		return -EINVAL;
>  
>  	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
> @@ -814,7 +814,7 @@ static int sur40_vidioc_enum_framesizes(struct file *file, void *priv,
>  static int sur40_vidioc_enum_frameintervals(struct file *file, void *priv,
>  					    struct v4l2_frmivalenum *f)
>  {
> -	if ((f->index > 1) || (f->pixel_format != V4L2_PIX_FMT_GREY)
> +	if ((f->index > 1) || (f->pixel_format != V4L2_TCH_FMT_TU08)
>  		|| (f->width  != sur40_video_format.width)
>  		|| (f->height != sur40_video_format.height))
>  			return -EINVAL;
> @@ -903,7 +903,7 @@ static const struct video_device sur40_video_device = {
>  };
>  
>  static const struct v4l2_pix_format sur40_video_format = {
> -	.pixelformat = V4L2_PIX_FMT_GREY,
> +	.pixelformat = V4L2_TCH_FMT_TU08,
>  	.width  = SENSOR_RES_X / 2,
>  	.height = SENSOR_RES_Y / 2,
>  	.field = V4L2_FIELD_NONE,
>