Merge tag 'media/v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull media updates from Mauro Carvalho Chehab:

 - Lots of improvements at the DVB API DocBook documentation.  Now, the
   frontend and the network APIs are fully in sync with the Kernel and
   looks more like the rest of the media documentation;

 - New frontend driver: cx24120

 - New driver for a PCI device: cobalt.  This driver is actually not
   sold in the market, but it is a good example of a multi-HDMI input
   device;

 - The dt3155 driver were promoted from staging;

 - The mantis driver got remote controller support;

 - New V4L2 driver for ST bdisp SoC chipsets;

 - Make sparse and smatch happier: several bugs were solved by fixing
   the issues reported by those static code analyzers.

 - Lots of new device additions, new features, improvements and cleanups
   at the existing drivers.

* tag 'media/v4.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (553 commits)
  [media] lmedm04: fix the range for relative measurements
  [media] lmedm04: use u32 instead of u64 for relative stats
  [media] omap3isp: remove unused var
  [media] saa7134: fix page size on some archs
  [media] use CONFIG_PM_SLEEP for suspend/resume
  [media] tuner-i2c: be consistent with I2C declaration
  [media] si470x: cleanup define namespace
  [media] bdisp: prevent compiling on random arch
  [media] vb2: Don't WARN when v4l2_buffer.bytesused is 0 for multiplanar buffers
  [media] MAINTAINERS: Add entry for the Renesas VSP1 driver
  [media] videodev2.h: fix copy-and-paste error in V4L2_MAP_XFER_FUNC_DEFAULT
  [media] Revert "[media] vb2: Push mmap_sem down to memops"
  [media] mantis: cleanup a warning
  [media] bdisp-debug: don't try to divide by s64
  [media] cx88: don't declare restart_video_queue if not used
  [media] au0828: move dev->boards atribuition to happen earlier
  [media] lmedm04: implement dvb v5 statistics
  [media] bdisp: remove unused var
  [media] bdisp: remove needless check
  ts2020: fix compilation on i386
  ...

2 files changed, 45 insertions, 4 deletions

diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 7afa6a2b776c..d20fe1dff403 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -980,8 +980,7 @@ config TOUCHSCREEN_SUN4I
 
 config TOUCHSCREEN_SUR40
 	tristate "Samsung SUR40 (Surface 2.0/PixelSense) touchscreen"
-	depends on USB
-	depends on MEDIA_USB_SUPPORT
+	depends on USB && MEDIA_USB_SUPPORT && HAS_DMA
 	select INPUT_POLLDEV
 	select VIDEOBUF2_DMA_SG
 	help
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index a24eba5ea843..8be7b9b79f20 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -125,7 +125,7 @@ struct sur40_image_header {
 #define VIDEO_PACKET_SIZE  16384
 
 /* polling interval (ms) */
-#define POLL_INTERVAL 10
+#define POLL_INTERVAL 4
 
 /* maximum number of contacts FIXME: this is a guess? */
 #define MAX_CONTACTS 64
@@ -342,7 +342,7 @@ static void sur40_poll(struct input_polled_dev *polldev)
 		 * instead of at the end.
 		 */
 		if (packet_id != header->packet_id)
-			dev_warn(sur40->dev, "packet ID mismatch\n");
+			dev_dbg(sur40->dev, "packet ID mismatch\n");
 
 		packet_blobs = result / sizeof(struct sur40_blob);
 		dev_dbg(sur40->dev, "received %d blobs\n", packet_blobs);
@@ -389,6 +389,8 @@ static void sur40_process_video(struct sur40_state *sur40)
 	list_del(&new_buf->list);
 	spin_unlock(&sur40->qlock);
 
+	dev_dbg(sur40->dev, "buffer acquired\n");
+
 	/* retrieve data via bulk read */
 	result = usb_bulk_msg(sur40->usbdev,
 			usb_rcvbulkpipe(sur40->usbdev, VIDEO_ENDPOINT),
@@ -416,6 +418,8 @@ static void sur40_process_video(struct sur40_state *sur40)
 		goto err_poll;
 	}
 
+	dev_dbg(sur40->dev, "header acquired\n");
+
 	sgt = vb2_dma_sg_plane_desc(&new_buf->vb, 0);
 
 	result = usb_sg_init(&sgr, sur40->usbdev,
@@ -432,11 +436,18 @@ static void sur40_process_video(struct sur40_state *sur40)
 		goto err_poll;
 	}
 
+	dev_dbg(sur40->dev, "image acquired\n");
+
+	/* return error if streaming was stopped in the meantime */
+	if (sur40->sequence == -1)
+		goto err_poll;
+
 	/* mark as finished */
 	v4l2_get_timestamp(&new_buf->vb.v4l2_buf.timestamp);
 	new_buf->vb.v4l2_buf.sequence = sur40->sequence++;
 	new_buf->vb.v4l2_buf.field = V4L2_FIELD_NONE;
 	vb2_buffer_done(&new_buf->vb, VB2_BUF_STATE_DONE);
+	dev_dbg(sur40->dev, "buffer marked done\n");
 	return;
 
 err_poll:
@@ -716,6 +727,7 @@ static int sur40_start_streaming(struct vb2_queue *vq, unsigned int count)
 static void sur40_stop_streaming(struct vb2_queue *vq)
 {
 	struct sur40_state *sur40 = vb2_get_drv_priv(vq);
+	sur40->sequence = -1;
 
 	/* Release all active buffers */
 	return_all_buffers(sur40, VB2_BUF_STATE_ERROR);
@@ -778,6 +790,33 @@ static int sur40_vidioc_enum_fmt(struct file *file, void *priv,
 	return 0;
 }
 
+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))
+		return -EINVAL;
+
+	f->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	f->discrete.width  = sur40_video_format.width;
+	f->discrete.height = sur40_video_format.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))
+			return -EINVAL;
+
+	f->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+	f->discrete.denominator  = 60/(f->index+1);
+	f->discrete.numerator = 1;
+	return 0;
+}
+
+
 static const struct usb_device_id sur40_table[] = {
 	{ USB_DEVICE(ID_MICROSOFT, ID_SUR40) },  /* Samsung SUR40 */
 	{ }                                      /* terminating null entry */
@@ -829,6 +868,9 @@ static const struct v4l2_ioctl_ops sur40_video_ioctl_ops = {
 	.vidioc_s_fmt_vid_cap	= sur40_vidioc_fmt,
 	.vidioc_g_fmt_vid_cap	= sur40_vidioc_fmt,
 
+	.vidioc_enum_framesizes = sur40_vidioc_enum_framesizes,
+	.vidioc_enum_frameintervals = sur40_vidioc_enum_frameintervals,
+
 	.vidioc_enum_input	= sur40_vidioc_enum_input,
 	.vidioc_g_input		= sur40_vidioc_g_input,
 	.vidioc_s_input		= sur40_vidioc_s_input,