diff mbox

[v6,11/11] Input: sur40 - use new V4L2 touch input type

Message ID 1467308334-12580-12-git-send-email-nick@shmanahar.org (mailing list archive)
State New, archived
Headers show

Commit Message

Nick Dyer June 30, 2016, 5:38 p.m. UTC 
Support both V4L2_TCH_FMT_TU08 and V4L2_PIX_FMT_GREY for backwards
compatibility.

Note: I have not tested these changes (I have no access to the hardware)
so not signing off.
---
 drivers/input/touchscreen/sur40.c | 121 +++++++++++++++++++++++++++-----------
 1 file changed, 88 insertions(+), 33 deletions(-)

Comments

Florian Echtler July 3, 2016, 6:11 p.m. UTC | #1 
On 30.06.2016 19:38, Nick Dyer wrote:
> Support both V4L2_TCH_FMT_TU08 and V4L2_PIX_FMT_GREY for backwards
> compatibility.
> 
> Note: I have not tested these changes (I have no access to the hardware)
> so not signing off.

I will try to test this ASAP. However, I'm currently ill, so it might
take a while - sorry.

Best, Florian

> ---
>  drivers/input/touchscreen/sur40.c | 121 +++++++++++++++++++++++++++-----------
>  1 file changed, 88 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index 880c40b..9ba68cf 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -139,6 +139,27 @@ struct sur40_image_header {
>  #define SUR40_GET_STATE   0xc5 /*  4 bytes state (?) */
>  #define SUR40_GET_SENSORS 0xb1 /*  8 bytes sensors   */
>  
> +static const struct v4l2_pix_format sur40_pix_format[] = {
> +	{
> +		.pixelformat = V4L2_TCH_FMT_TU08,
> +		.width  = SENSOR_RES_X / 2,
> +		.height = SENSOR_RES_Y / 2,
> +		.field = V4L2_FIELD_NONE,
> +		.colorspace = V4L2_COLORSPACE_SRGB,
> +		.bytesperline = SENSOR_RES_X / 2,
> +		.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
> +	},
> +	{
> +		.pixelformat = V4L2_PIX_FMT_GREY,
> +		.width  = SENSOR_RES_X / 2,
> +		.height = SENSOR_RES_Y / 2,
> +		.field = V4L2_FIELD_NONE,
> +		.colorspace = V4L2_COLORSPACE_SRGB,
> +		.bytesperline = SENSOR_RES_X / 2,
> +		.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
> +	}
> +};
> +
>  /* master device state */
>  struct sur40_state {
>  
> @@ -149,6 +170,7 @@ struct sur40_state {
>  	struct v4l2_device v4l2;
>  	struct video_device vdev;
>  	struct mutex lock;
> +	struct v4l2_pix_format pix_fmt;
>  
>  	struct vb2_queue queue;
>  	struct vb2_alloc_ctx *alloc_ctx;
> @@ -170,7 +192,6 @@ struct sur40_buffer {
>  
>  /* forward declarations */
>  static const struct video_device sur40_video_device;
> -static const struct v4l2_pix_format sur40_video_format;
>  static const struct vb2_queue sur40_queue;
>  static void sur40_process_video(struct sur40_state *sur40);
>  
> @@ -421,7 +442,7 @@ static void sur40_process_video(struct sur40_state *sur40)
>  		goto err_poll;
>  	}
>  
> -	if (le32_to_cpu(img->size) != sur40_video_format.sizeimage) {
> +	if (le32_to_cpu(img->size) != sur40->pix_fmt.sizeimage) {
>  		dev_err(sur40->dev, "image size mismatch\n");
>  		goto err_poll;
>  	}
> @@ -432,7 +453,7 @@ static void sur40_process_video(struct sur40_state *sur40)
>  
>  	result = usb_sg_init(&sgr, sur40->usbdev,
>  		usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), 0,
> -		sgt->sgl, sgt->nents, sur40_video_format.sizeimage, 0);
> +		sgt->sgl, sgt->nents, sur40->pix_fmt.sizeimage, 0);
>  	if (result < 0) {
>  		dev_err(sur40->dev, "error %d in usb_sg_init\n", result);
>  		goto err_poll;
> @@ -593,13 +614,14 @@ static int sur40_probe(struct usb_interface *interface,
>  		goto err_unreg_v4l2;
>  	}
>  
> +	sur40->pix_fmt = sur40_pix_format[0];
>  	sur40->vdev = sur40_video_device;
>  	sur40->vdev.v4l2_dev = &sur40->v4l2;
>  	sur40->vdev.lock = &sur40->lock;
>  	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.");
> @@ -662,10 +684,10 @@ static int sur40_queue_setup(struct vb2_queue *q,
>  	alloc_ctxs[0] = sur40->alloc_ctx;
>  
>  	if (*nplanes)
> -		return sizes[0] < sur40_video_format.sizeimage ? -EINVAL : 0;
> +		return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0;
>  
>  	*nplanes = 1;
> -	sizes[0] = sur40_video_format.sizeimage;
> +	sizes[0] = sur40->pix_fmt.sizeimage;
>  
>  	return 0;
>  }
> @@ -677,7 +699,7 @@ static int sur40_queue_setup(struct vb2_queue *q,
>  static int sur40_buffer_prepare(struct vb2_buffer *vb)
>  {
>  	struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
> -	unsigned long size = sur40_video_format.sizeimage;
> +	unsigned long size = sur40->pix_fmt.sizeimage;
>  
>  	if (vb2_plane_size(vb, 0) < size) {
>  		dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n",
> @@ -751,7 +773,7 @@ static int sur40_vidioc_querycap(struct file *file, void *priv,
>  	strlcpy(cap->driver, DRIVER_SHORT, sizeof(cap->driver));
>  	strlcpy(cap->card, DRIVER_LONG, sizeof(cap->card));
>  	usb_make_path(sur40->usbdev, cap->bus_info, sizeof(cap->bus_info));
> -	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
> +	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
>  		V4L2_CAP_READWRITE |
>  		V4L2_CAP_STREAMING;
>  	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> @@ -763,7 +785,7 @@ 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;
> @@ -781,20 +803,57 @@ static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
>  	return 0;
>  }
>  
> -static int sur40_vidioc_fmt(struct file *file, void *priv,
> +static int sur40_vidioc_try_fmt(struct file *file, void *priv,
>  			    struct v4l2_format *f)
>  {
> -	f->fmt.pix = sur40_video_format;
> +	switch (f->fmt.pix.pixelformat) {
> +		case V4L2_PIX_FMT_GREY:
> +			f->fmt.pix = sur40_pix_format[1];
> +			break;
> +
> +		default:
> +			f->fmt.pix = sur40_pix_format[0];
> +			break;
> +	}
> +
> +	return 0;
> +}
> +
> +static int sur40_vidioc_s_fmt(struct file *file, void *priv,
> +			    struct v4l2_format *f)
> +{
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	switch (f->fmt.pix.pixelformat) {
> +		case V4L2_PIX_FMT_GREY:
> +			sur40->pix_fmt = sur40_pix_format[1];
> +			break;
> +
> +		default:
> +			sur40->pix_fmt = sur40_pix_format[0];
> +			break;
> +	}
> +
> +	f->fmt.pix = sur40->pix_fmt;
> +	return 0;
> +}
> +
> +static int sur40_vidioc_g_fmt(struct file *file, void *priv,
> +			    struct v4l2_format *f)
> +{
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	f->fmt.pix = sur40->pix_fmt;
>  	return 0;
>  }
>  
>  static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
>  				 struct v4l2_fmtdesc *f)
>  {
> -	if (f->index != 0)
> +	if (f->index >= ARRAY_SIZE(sur40_pix_format))
>  		return -EINVAL;
> -	strlcpy(f->description, "8-bit greyscale", sizeof(f->description));
> -	f->pixelformat = V4L2_PIX_FMT_GREY;
> +
> +	f->pixelformat = sur40_pix_format[f->index].pixelformat;
>  	f->flags = 0;
>  	return 0;
>  }
> @@ -802,21 +861,27 @@ 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))
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	if ((f->index != 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
> +		&& (f->pixel_format != V4L2_PIX_FMT_GREY)))
>  		return -EINVAL;
>  
>  	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
> -	f->discrete.width  = sur40_video_format.width;
> -	f->discrete.height = sur40_video_format.height;
> +	f->discrete.width  = sur40->pix_fmt.width;
> +	f->discrete.height = sur40->pix_fmt.height;
>  	return 0;
>  }
>  
>  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)
> -		|| (f->width  != sur40_video_format.width)
> -		|| (f->height != sur40_video_format.height))
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	if ((f->index > 1) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
> +	        && (f->pixel_format != V4L2_PIX_FMT_GREY))
> +		|| (f->width  != sur40->pix_fmt.width)
> +		|| (f->height != sur40->pix_fmt.height))
>  			return -EINVAL;
>  
>  	f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
> @@ -873,9 +938,9 @@ static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
>  	.vidioc_querycap	= sur40_vidioc_querycap,
>  
>  	.vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt,
> -	.vidioc_try_fmt_vid_cap	= sur40_vidioc_fmt,
> -	.vidioc_s_fmt_vid_cap	= sur40_vidioc_fmt,
> -	.vidioc_g_fmt_vid_cap	= sur40_vidioc_fmt,
> +	.vidioc_try_fmt_vid_cap	= sur40_vidioc_try_fmt,
> +	.vidioc_s_fmt_vid_cap	= sur40_vidioc_s_fmt,
> +	.vidioc_g_fmt_vid_cap	= sur40_vidioc_g_fmt,
>  
>  	.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
>  	.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
> @@ -902,16 +967,6 @@ static const struct video_device sur40_video_device = {
>  	.release = video_device_release_empty,
>  };
>  
> -static const struct v4l2_pix_format sur40_video_format = {
> -	.pixelformat = V4L2_PIX_FMT_GREY,
> -	.width  = SENSOR_RES_X / 2,
> -	.height = SENSOR_RES_Y / 2,
> -	.field = V4L2_FIELD_NONE,
> -	.colorspace = V4L2_COLORSPACE_SRGB,
> -	.bytesperline = SENSOR_RES_X / 2,
> -	.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
> -};
> -
>  /* USB-specific object needed to register this driver with the USB subsystem. */
>  static struct usb_driver sur40_driver = {
>  	.name = DRIVER_SHORT,
>
Pavel Machek Aug. 5, 2016, 1:39 p.m. UTC | #2 
On Thu 2016-06-30 18:38:54, Nick Dyer wrote:
> Support both V4L2_TCH_FMT_TU08 and V4L2_PIX_FMT_GREY for backwards
> compatibility.
> 
> Note: I have not tested these changes (I have no access to the hardware)
> so not signing off.

Sign off means something else, see docs... and sign patches off :-).

									Pavel
> ---
>  drivers/input/touchscreen/sur40.c | 121 +++++++++++++++++++++++++++-----------
>  1 file changed, 88 insertions(+), 33 deletions(-)
> 
> diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
> index 880c40b..9ba68cf 100644
> --- a/drivers/input/touchscreen/sur40.c
> +++ b/drivers/input/touchscreen/sur40.c
> @@ -139,6 +139,27 @@ struct sur40_image_header {
>  #define SUR40_GET_STATE   0xc5 /*  4 bytes state (?) */
>  #define SUR40_GET_SENSORS 0xb1 /*  8 bytes sensors   */
>  
> +static const struct v4l2_pix_format sur40_pix_format[] = {
> +	{
> +		.pixelformat = V4L2_TCH_FMT_TU08,
> +		.width  = SENSOR_RES_X / 2,
> +		.height = SENSOR_RES_Y / 2,
> +		.field = V4L2_FIELD_NONE,
> +		.colorspace = V4L2_COLORSPACE_SRGB,
> +		.bytesperline = SENSOR_RES_X / 2,
> +		.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
> +	},
> +	{
> +		.pixelformat = V4L2_PIX_FMT_GREY,
> +		.width  = SENSOR_RES_X / 2,
> +		.height = SENSOR_RES_Y / 2,
> +		.field = V4L2_FIELD_NONE,
> +		.colorspace = V4L2_COLORSPACE_SRGB,
> +		.bytesperline = SENSOR_RES_X / 2,
> +		.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
> +	}
> +};
> +
>  /* master device state */
>  struct sur40_state {
>  
> @@ -149,6 +170,7 @@ struct sur40_state {
>  	struct v4l2_device v4l2;
>  	struct video_device vdev;
>  	struct mutex lock;
> +	struct v4l2_pix_format pix_fmt;
>  
>  	struct vb2_queue queue;
>  	struct vb2_alloc_ctx *alloc_ctx;
> @@ -170,7 +192,6 @@ struct sur40_buffer {
>  
>  /* forward declarations */
>  static const struct video_device sur40_video_device;
> -static const struct v4l2_pix_format sur40_video_format;
>  static const struct vb2_queue sur40_queue;
>  static void sur40_process_video(struct sur40_state *sur40);
>  
> @@ -421,7 +442,7 @@ static void sur40_process_video(struct sur40_state *sur40)
>  		goto err_poll;
>  	}
>  
> -	if (le32_to_cpu(img->size) != sur40_video_format.sizeimage) {
> +	if (le32_to_cpu(img->size) != sur40->pix_fmt.sizeimage) {
>  		dev_err(sur40->dev, "image size mismatch\n");
>  		goto err_poll;
>  	}
> @@ -432,7 +453,7 @@ static void sur40_process_video(struct sur40_state *sur40)
>  
>  	result = usb_sg_init(&sgr, sur40->usbdev,
>  		usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), 0,
> -		sgt->sgl, sgt->nents, sur40_video_format.sizeimage, 0);
> +		sgt->sgl, sgt->nents, sur40->pix_fmt.sizeimage, 0);
>  	if (result < 0) {
>  		dev_err(sur40->dev, "error %d in usb_sg_init\n", result);
>  		goto err_poll;
> @@ -593,13 +614,14 @@ static int sur40_probe(struct usb_interface *interface,
>  		goto err_unreg_v4l2;
>  	}
>  
> +	sur40->pix_fmt = sur40_pix_format[0];
>  	sur40->vdev = sur40_video_device;
>  	sur40->vdev.v4l2_dev = &sur40->v4l2;
>  	sur40->vdev.lock = &sur40->lock;
>  	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.");
> @@ -662,10 +684,10 @@ static int sur40_queue_setup(struct vb2_queue *q,
>  	alloc_ctxs[0] = sur40->alloc_ctx;
>  
>  	if (*nplanes)
> -		return sizes[0] < sur40_video_format.sizeimage ? -EINVAL : 0;
> +		return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0;
>  
>  	*nplanes = 1;
> -	sizes[0] = sur40_video_format.sizeimage;
> +	sizes[0] = sur40->pix_fmt.sizeimage;
>  
>  	return 0;
>  }
> @@ -677,7 +699,7 @@ static int sur40_queue_setup(struct vb2_queue *q,
>  static int sur40_buffer_prepare(struct vb2_buffer *vb)
>  {
>  	struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
> -	unsigned long size = sur40_video_format.sizeimage;
> +	unsigned long size = sur40->pix_fmt.sizeimage;
>  
>  	if (vb2_plane_size(vb, 0) < size) {
>  		dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n",
> @@ -751,7 +773,7 @@ static int sur40_vidioc_querycap(struct file *file, void *priv,
>  	strlcpy(cap->driver, DRIVER_SHORT, sizeof(cap->driver));
>  	strlcpy(cap->card, DRIVER_LONG, sizeof(cap->card));
>  	usb_make_path(sur40->usbdev, cap->bus_info, sizeof(cap->bus_info));
> -	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
> +	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
>  		V4L2_CAP_READWRITE |
>  		V4L2_CAP_STREAMING;
>  	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
> @@ -763,7 +785,7 @@ 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;
> @@ -781,20 +803,57 @@ static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
>  	return 0;
>  }
>  
> -static int sur40_vidioc_fmt(struct file *file, void *priv,
> +static int sur40_vidioc_try_fmt(struct file *file, void *priv,
>  			    struct v4l2_format *f)
>  {
> -	f->fmt.pix = sur40_video_format;
> +	switch (f->fmt.pix.pixelformat) {
> +		case V4L2_PIX_FMT_GREY:
> +			f->fmt.pix = sur40_pix_format[1];
> +			break;
> +
> +		default:
> +			f->fmt.pix = sur40_pix_format[0];
> +			break;
> +	}
> +
> +	return 0;
> +}
> +
> +static int sur40_vidioc_s_fmt(struct file *file, void *priv,
> +			    struct v4l2_format *f)
> +{
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	switch (f->fmt.pix.pixelformat) {
> +		case V4L2_PIX_FMT_GREY:
> +			sur40->pix_fmt = sur40_pix_format[1];
> +			break;
> +
> +		default:
> +			sur40->pix_fmt = sur40_pix_format[0];
> +			break;
> +	}
> +
> +	f->fmt.pix = sur40->pix_fmt;
> +	return 0;
> +}
> +
> +static int sur40_vidioc_g_fmt(struct file *file, void *priv,
> +			    struct v4l2_format *f)
> +{
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	f->fmt.pix = sur40->pix_fmt;
>  	return 0;
>  }
>  
>  static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
>  				 struct v4l2_fmtdesc *f)
>  {
> -	if (f->index != 0)
> +	if (f->index >= ARRAY_SIZE(sur40_pix_format))
>  		return -EINVAL;
> -	strlcpy(f->description, "8-bit greyscale", sizeof(f->description));
> -	f->pixelformat = V4L2_PIX_FMT_GREY;
> +
> +	f->pixelformat = sur40_pix_format[f->index].pixelformat;
>  	f->flags = 0;
>  	return 0;
>  }
> @@ -802,21 +861,27 @@ 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))
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	if ((f->index != 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
> +		&& (f->pixel_format != V4L2_PIX_FMT_GREY)))
>  		return -EINVAL;
>  
>  	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
> -	f->discrete.width  = sur40_video_format.width;
> -	f->discrete.height = sur40_video_format.height;
> +	f->discrete.width  = sur40->pix_fmt.width;
> +	f->discrete.height = sur40->pix_fmt.height;
>  	return 0;
>  }
>  
>  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)
> -		|| (f->width  != sur40_video_format.width)
> -		|| (f->height != sur40_video_format.height))
> +	struct sur40_state *sur40 = video_drvdata(file);
> +
> +	if ((f->index > 1) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
> +	        && (f->pixel_format != V4L2_PIX_FMT_GREY))
> +		|| (f->width  != sur40->pix_fmt.width)
> +		|| (f->height != sur40->pix_fmt.height))
>  			return -EINVAL;
>  
>  	f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
> @@ -873,9 +938,9 @@ static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
>  	.vidioc_querycap	= sur40_vidioc_querycap,
>  
>  	.vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt,
> -	.vidioc_try_fmt_vid_cap	= sur40_vidioc_fmt,
> -	.vidioc_s_fmt_vid_cap	= sur40_vidioc_fmt,
> -	.vidioc_g_fmt_vid_cap	= sur40_vidioc_fmt,
> +	.vidioc_try_fmt_vid_cap	= sur40_vidioc_try_fmt,
> +	.vidioc_s_fmt_vid_cap	= sur40_vidioc_s_fmt,
> +	.vidioc_g_fmt_vid_cap	= sur40_vidioc_g_fmt,
>  
>  	.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
>  	.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
> @@ -902,16 +967,6 @@ static const struct video_device sur40_video_device = {
>  	.release = video_device_release_empty,
>  };
>  
> -static const struct v4l2_pix_format sur40_video_format = {
> -	.pixelformat = V4L2_PIX_FMT_GREY,
> -	.width  = SENSOR_RES_X / 2,
> -	.height = SENSOR_RES_Y / 2,
> -	.field = V4L2_FIELD_NONE,
> -	.colorspace = V4L2_COLORSPACE_SRGB,
> -	.bytesperline = SENSOR_RES_X / 2,
> -	.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
> -};
> -
>  /* USB-specific object needed to register this driver with the USB subsystem. */
>  static struct usb_driver sur40_driver = {
>  	.name = DRIVER_SHORT,
diff mbox

Patch

diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 880c40b..9ba68cf 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -139,6 +139,27 @@  struct sur40_image_header {
 #define SUR40_GET_STATE   0xc5 /*  4 bytes state (?) */
 #define SUR40_GET_SENSORS 0xb1 /*  8 bytes sensors   */
 
+static const struct v4l2_pix_format sur40_pix_format[] = {
+	{
+		.pixelformat = V4L2_TCH_FMT_TU08,
+		.width  = SENSOR_RES_X / 2,
+		.height = SENSOR_RES_Y / 2,
+		.field = V4L2_FIELD_NONE,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.bytesperline = SENSOR_RES_X / 2,
+		.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
+	},
+	{
+		.pixelformat = V4L2_PIX_FMT_GREY,
+		.width  = SENSOR_RES_X / 2,
+		.height = SENSOR_RES_Y / 2,
+		.field = V4L2_FIELD_NONE,
+		.colorspace = V4L2_COLORSPACE_SRGB,
+		.bytesperline = SENSOR_RES_X / 2,
+		.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
+	}
+};
+
 /* master device state */
 struct sur40_state {
 
@@ -149,6 +170,7 @@  struct sur40_state {
 	struct v4l2_device v4l2;
 	struct video_device vdev;
 	struct mutex lock;
+	struct v4l2_pix_format pix_fmt;
 
 	struct vb2_queue queue;
 	struct vb2_alloc_ctx *alloc_ctx;
@@ -170,7 +192,6 @@  struct sur40_buffer {
 
 /* forward declarations */
 static const struct video_device sur40_video_device;
-static const struct v4l2_pix_format sur40_video_format;
 static const struct vb2_queue sur40_queue;
 static void sur40_process_video(struct sur40_state *sur40);
 
@@ -421,7 +442,7 @@  static void sur40_process_video(struct sur40_state *sur40)
 		goto err_poll;
 	}
 
-	if (le32_to_cpu(img->size) != sur40_video_format.sizeimage) {
+	if (le32_to_cpu(img->size) != sur40->pix_fmt.sizeimage) {
 		dev_err(sur40->dev, "image size mismatch\n");
 		goto err_poll;
 	}
@@ -432,7 +453,7 @@  static void sur40_process_video(struct sur40_state *sur40)
 
 	result = usb_sg_init(&sgr, sur40->usbdev,
 		usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT), 0,
-		sgt->sgl, sgt->nents, sur40_video_format.sizeimage, 0);
+		sgt->sgl, sgt->nents, sur40->pix_fmt.sizeimage, 0);
 	if (result < 0) {
 		dev_err(sur40->dev, "error %d in usb_sg_init\n", result);
 		goto err_poll;
@@ -593,13 +614,14 @@  static int sur40_probe(struct usb_interface *interface,
 		goto err_unreg_v4l2;
 	}
 
+	sur40->pix_fmt = sur40_pix_format[0];
 	sur40->vdev = sur40_video_device;
 	sur40->vdev.v4l2_dev = &sur40->v4l2;
 	sur40->vdev.lock = &sur40->lock;
 	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.");
@@ -662,10 +684,10 @@  static int sur40_queue_setup(struct vb2_queue *q,
 	alloc_ctxs[0] = sur40->alloc_ctx;
 
 	if (*nplanes)
-		return sizes[0] < sur40_video_format.sizeimage ? -EINVAL : 0;
+		return sizes[0] < sur40->pix_fmt.sizeimage ? -EINVAL : 0;
 
 	*nplanes = 1;
-	sizes[0] = sur40_video_format.sizeimage;
+	sizes[0] = sur40->pix_fmt.sizeimage;
 
 	return 0;
 }
@@ -677,7 +699,7 @@  static int sur40_queue_setup(struct vb2_queue *q,
 static int sur40_buffer_prepare(struct vb2_buffer *vb)
 {
 	struct sur40_state *sur40 = vb2_get_drv_priv(vb->vb2_queue);
-	unsigned long size = sur40_video_format.sizeimage;
+	unsigned long size = sur40->pix_fmt.sizeimage;
 
 	if (vb2_plane_size(vb, 0) < size) {
 		dev_err(&sur40->usbdev->dev, "buffer too small (%lu < %lu)\n",
@@ -751,7 +773,7 @@  static int sur40_vidioc_querycap(struct file *file, void *priv,
 	strlcpy(cap->driver, DRIVER_SHORT, sizeof(cap->driver));
 	strlcpy(cap->card, DRIVER_LONG, sizeof(cap->card));
 	usb_make_path(sur40->usbdev, cap->bus_info, sizeof(cap->bus_info));
-	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE |
+	cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH |
 		V4L2_CAP_READWRITE |
 		V4L2_CAP_STREAMING;
 	cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
@@ -763,7 +785,7 @@  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;
@@ -781,20 +803,57 @@  static int sur40_vidioc_g_input(struct file *file, void *priv, unsigned int *i)
 	return 0;
 }
 
-static int sur40_vidioc_fmt(struct file *file, void *priv,
+static int sur40_vidioc_try_fmt(struct file *file, void *priv,
 			    struct v4l2_format *f)
 {
-	f->fmt.pix = sur40_video_format;
+	switch (f->fmt.pix.pixelformat) {
+		case V4L2_PIX_FMT_GREY:
+			f->fmt.pix = sur40_pix_format[1];
+			break;
+
+		default:
+			f->fmt.pix = sur40_pix_format[0];
+			break;
+	}
+
+	return 0;
+}
+
+static int sur40_vidioc_s_fmt(struct file *file, void *priv,
+			    struct v4l2_format *f)
+{
+	struct sur40_state *sur40 = video_drvdata(file);
+
+	switch (f->fmt.pix.pixelformat) {
+		case V4L2_PIX_FMT_GREY:
+			sur40->pix_fmt = sur40_pix_format[1];
+			break;
+
+		default:
+			sur40->pix_fmt = sur40_pix_format[0];
+			break;
+	}
+
+	f->fmt.pix = sur40->pix_fmt;
+	return 0;
+}
+
+static int sur40_vidioc_g_fmt(struct file *file, void *priv,
+			    struct v4l2_format *f)
+{
+	struct sur40_state *sur40 = video_drvdata(file);
+
+	f->fmt.pix = sur40->pix_fmt;
 	return 0;
 }
 
 static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
 				 struct v4l2_fmtdesc *f)
 {
-	if (f->index != 0)
+	if (f->index >= ARRAY_SIZE(sur40_pix_format))
 		return -EINVAL;
-	strlcpy(f->description, "8-bit greyscale", sizeof(f->description));
-	f->pixelformat = V4L2_PIX_FMT_GREY;
+
+	f->pixelformat = sur40_pix_format[f->index].pixelformat;
 	f->flags = 0;
 	return 0;
 }
@@ -802,21 +861,27 @@  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))
+	struct sur40_state *sur40 = video_drvdata(file);
+
+	if ((f->index != 0) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
+		&& (f->pixel_format != V4L2_PIX_FMT_GREY)))
 		return -EINVAL;
 
 	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
-	f->discrete.width  = sur40_video_format.width;
-	f->discrete.height = sur40_video_format.height;
+	f->discrete.width  = sur40->pix_fmt.width;
+	f->discrete.height = sur40->pix_fmt.height;
 	return 0;
 }
 
 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)
-		|| (f->width  != sur40_video_format.width)
-		|| (f->height != sur40_video_format.height))
+	struct sur40_state *sur40 = video_drvdata(file);
+
+	if ((f->index > 1) || ((f->pixel_format != V4L2_TCH_FMT_TU08)
+	        && (f->pixel_format != V4L2_PIX_FMT_GREY))
+		|| (f->width  != sur40->pix_fmt.width)
+		|| (f->height != sur40->pix_fmt.height))
 			return -EINVAL;
 
 	f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
@@ -873,9 +938,9 @@  static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
 	.vidioc_querycap	= sur40_vidioc_querycap,
 
 	.vidioc_enum_fmt_vid_cap = sur40_vidioc_enum_fmt,
-	.vidioc_try_fmt_vid_cap	= sur40_vidioc_fmt,
-	.vidioc_s_fmt_vid_cap	= sur40_vidioc_fmt,
-	.vidioc_g_fmt_vid_cap	= sur40_vidioc_fmt,
+	.vidioc_try_fmt_vid_cap	= sur40_vidioc_try_fmt,
+	.vidioc_s_fmt_vid_cap	= sur40_vidioc_s_fmt,
+	.vidioc_g_fmt_vid_cap	= sur40_vidioc_g_fmt,
 
 	.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
 	.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
@@ -902,16 +967,6 @@  static const struct video_device sur40_video_device = {
 	.release = video_device_release_empty,
 };
 
-static const struct v4l2_pix_format sur40_video_format = {
-	.pixelformat = V4L2_PIX_FMT_GREY,
-	.width  = SENSOR_RES_X / 2,
-	.height = SENSOR_RES_Y / 2,
-	.field = V4L2_FIELD_NONE,
-	.colorspace = V4L2_COLORSPACE_SRGB,
-	.bytesperline = SENSOR_RES_X / 2,
-	.sizeimage = (SENSOR_RES_X/2) * (SENSOR_RES_Y/2),
-};
-
 /* USB-specific object needed to register this driver with the USB subsystem. */
 static struct usb_driver sur40_driver = {
 	.name = DRIVER_SHORT,