[v5] vivid: Add touch support
diff mbox series

Message ID 20191113112057.31189-1-bnvandana@gmail.com
State New
Headers show
Series
  • [v5] vivid: Add touch support
Related show

Commit Message

Vandana BN Nov. 13, 2019, 11:20 a.m. UTC
Support to emulate touch devices in vivid driver.

Signed-off-by: Vandana BN <bnvandana@gmail.com>
---
Incorporate changes from https://patchwork.linuxtv.org/patch/59782/,
to avoid the mutex unlocking/relocking around the kthread_stop.
---
 drivers/media/platform/vivid/Makefile         |   3 +-
 drivers/media/platform/vivid/vivid-core.c     | 187 +++++++++-
 drivers/media/platform/vivid/vivid-core.h     |  22 ++
 drivers/media/platform/vivid/vivid-ctrls.c    |  11 +
 .../platform/vivid/vivid-kthread-touch.c      | 187 ++++++++++
 .../platform/vivid/vivid-kthread-touch.h      |  13 +
 .../media/platform/vivid/vivid-touch-cap.c    | 324 ++++++++++++++++++
 .../media/platform/vivid/vivid-touch-cap.h    |  39 +++
 8 files changed, 771 insertions(+), 15 deletions(-)
 create mode 100644 drivers/media/platform/vivid/vivid-kthread-touch.c
 create mode 100644 drivers/media/platform/vivid/vivid-kthread-touch.h
 create mode 100644 drivers/media/platform/vivid/vivid-touch-cap.c
 create mode 100644 drivers/media/platform/vivid/vivid-touch-cap.h

Comments

Hans Verkuil Nov. 13, 2019, 2:15 p.m. UTC | #1
Hi Vandana,

I've been doing some testing with the Synaptics rmi4 driver that supports
the touch API. I finally got a result, but it requires a bit of work in the
vivid driver (and v4l2-ctl) because it means that vivid should use a different
touch format to match what this driver returns.

Some background (based on what I understood from the driver): the Synaptics
driver is used for touchpads on laptops. The touch API itself is meant for
diagnostics only, and not for regular use. It 'captures' 21x12 points ('pixels')
as an image containing the capacitance measurements.

It looks as if typically not all measuring points are available, instead only a
subset is actually returning valid values in this diagnostic module.

Which points are available is reported in 'Function 55', which my Synaptics
touchpad does not support, so instead the touch API falls back to the default
of 21x12. Looking at the values I receive it appears that on my laptop only
part of the bottom set of points in the touchpad is made available (16x1).
Alternatively, this could be just a driver bug (I really do not trust the driver,
I doubt it sees much testing so it could very well be a regression).

In any case, this is sufficient to see what sort of data values are used.

This is with input 0 of the v4l-touch0 device which uses this format:

https://hverkuil.home.xs4all.nl/spec/uapi/v4l/pixfmt-tch-td16.html

Also, this format returns the data in little endian format. I suspect that
the documentation for this touch formats is wrong since that indicates big-endian.

So vivid/v4l2-ctl should be modified to use this instead of V4L2_TCH_FMT_TU16.

Below is a dump of what happens if I move my finger from left to right. Each
line is a single frame. As you can see, the background values are around 0.
When pressed that max value is around 200 and you see a small Bell-curve
of lower values around it stretching 3-4 points.

I'm not sure if it is worth reproducing that Bell curve in vivid, I think it
is OK to just set a single value. The background noise can be something like
a random number between -3 and 3, and the pressure point a random number between
200-220.

Regards,

	Hans


     -2     -4     -2     -2     -3     -3     -3     -3     -4     -5     -5     -5     -3     -4     -4     -4
      1      0      1      0      0      0      0      0      0      0      0      0      0      0      0      0
     -2     -3     -2     -2     -3     -4     -3     -4     -4     -3     -4     -4     -4     -4     -3     -4
     13      1      1      0      0      0      0      0      0      0      0      0      0      0      0      1
     49      0     -2     -2     -2     -4     -3     -4     -4     -5     -5     -4     -3     -4     -4     -3
    201     65      3      0      0      0      0      0      0      0      0      0      0      0      0      0
    191    143      3     -2     -2     -3     -3     -4     -5     -5     -5     -5     -4     -5     -4     -5
    198    155      8      1      0      0      0      0      0      0      0      0      1      0      1      0
    190    159      5     -1     -2     -3     -3     -3     -4     -5     -4     -6     -4     -5     -4     -6
    145    214     56      1      1      0      0      0      0      0      0      0      1      0      0      2
     90    211     91      0     -2     -3     -3     -4     -4     -5     -3     -5     -3     -4     -4     -4
     32    203    171     12      2      0      0      0      0      0      1      0      1      0      1      0
      0     71    211    143      2     -3     -3     -3     -3     -3     -3     -3     -2     -3     -3     -3
      1     18    193    209     31      1      1      0      0      0      0      0      0      0      0      0
     -2     15    192    206     29     -2     -2     -2     -4     -3     -4     -4     -3     -3     -4     -3
      2     21    197    215     37      2      1      0      0      0      0      0      0      0      0      0
     -2     15    190    209     33     -1     -3     -3     -4     -4     -4     -4     -3     -4     -3     -4
      0      3    100    220    153      6      1      0      0      0      0      0      1      0      0      0
     -3     -2     20    200    211     35     -1     -2     -3     -3     -2     -4     -3     -3     -2     -2
      0      0      6    150    222    105      3      0      0      0      1      0      1      0      0      1
     -4     -4     -2     35    208    192     24     -1     -4     -3     -2     -3     -2     -3     -3     -2
      0      0      1     35    212    198     29      1      0      0      0      0      0      0      0      0
     -3     -3     -2      3    157    198     93      0     -3     -3     -3     -3     -2     -3     -3     -2
      0      0      0      0     30    191    197     44      1      0      1      0      2      1      1      1
     -3     -4     -3     -3     -1     66    192    182      8     -2     -2     -4     -3     -3     -3     -3
      0      0      0      0      0      5    133    212    134      5      1      1      1      1      1      1
     -3     -5     -3     -5     -4     -3     19    191    208     51     -1     -4     -3     -4     -3     -3
      1      0      0      0      0      0      6    141    212    133      6      1      2      1      2      2
     -4     -4     -3     -4     -4     -4     -1     48    206    198     19     -3     -2     -4     -3     -3
      0      0      0      0      0      0      0      3    112    214    162      6      1      1      2      1
     -3     -4     -4     -5     -5     -4     -3     -2      9    175    202     66     -1     -3     -3     -3
      0      0      0      0      0      0      0      0      2     63    205    205     22      1      1      1
     -3     -5     -2     -4     -4     -4     -4     -4     -3     28    191    214     40     -2     -3     -5
      0      0      0      0      0      0      0      0      0     14    169    223     86      3      1      1
     -3     -4     -3     -4     -4     -3     -3     -4     -4     -1     58    213    184      7     -2     -3
      0      0      0      0      0      0      0      0      0      0     10    200    225     83      2      1
     -4     -5     -4     -5     -5     -5     -5     -4     -5     -4      1    165    218    105      0     -4
      0      0      0      0      0      0      0      0      0      0      2     76    222    192     13      1
     -3     -4     -4     -4     -5     -5     -4     -4     -5     -6     -5     -1    107    214    149      0
      0      0      0      0      0      0      0      0      0      0      0      0     14    181    211     83
     -3     -4     -3     -4     -4     -4     -3     -4     -4     -4     -4     -4      0     54    205    191
      0      0      0      0      0      0      0      0      0      0      0      0      1      7    136    210
     -3     -4     -4     -4     -5     -5     -5     -4     -5     -4     -4     -5     -4     -3     14    179
      0      0      0      0      0      0      0      0      0      0      0      0      0      0      3     74
     -3     -4     -3     -5     -4     -5     -4     -4     -4     -4     -5     -6     -5     -4     -4     -1
      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0
     -3     -4     -3     -3     -4     -4     -3     -4     -5     -5     -5     -5     -5     -4     -4     -4
      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0
     -3     -4     -3     -4     -4     -5     -4     -4     -4     -5     -5     -6     -5     -5     -4     -4
      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0
     -3     -4     -3     -4     -4     -4     -4     -4     -5     -4     -5     -6     -4     -5     -5     -5
      0      0      0      0      0      0      0      0     -1     -1      0     -1      0     -1      0      0
     -3     -4     -2     -4     -3     -4     -4     -4     -4     -4     -4     -5     -4     -5     -3     -3
      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0
Hans Verkuil Nov. 13, 2019, 2:52 p.m. UTC | #2
On 11/13/19 3:15 PM, Hans Verkuil wrote:
> Hi Vandana,
> 
> I've been doing some testing with the Synaptics rmi4 driver that supports
> the touch API. I finally got a result, but it requires a bit of work in the
> vivid driver (and v4l2-ctl) because it means that vivid should use a different
> touch format to match what this driver returns.
> 
> Some background (based on what I understood from the driver): the Synaptics
> driver is used for touchpads on laptops. The touch API itself is meant for
> diagnostics only, and not for regular use. It 'captures' 21x12 points ('pixels')
> as an image containing the capacitance measurements.
> 
> It looks as if typically not all measuring points are available, instead only a
> subset is actually returning valid values in this diagnostic module.
> 
> Which points are available is reported in 'Function 55', which my Synaptics
> touchpad does not support, so instead the touch API falls back to the default
> of 21x12. Looking at the values I receive it appears that on my laptop only
> part of the bottom set of points in the touchpad is made available (16x1).
> Alternatively, this could be just a driver bug (I really do not trust the driver,
> I doubt it sees much testing so it could very well be a regression).

Yes, it is a regression. I am now able to get a proper 'picture' out of the driver:

      0      0      0      0      0      0      0      0      1      0      0      0      0      0      0     -1      0     -1      0      0      0
      0      0      0      0      0      0      0      0      1      1      1      0      0      0      0      0      0      0      0      0      0
      0      0      0      0      0      0      0      1      3      8      9      3      0      1      0      0      0      0      0      0      0
      0      0      0      0      0      0      0      1     11    131    132     14      3      0      0      0      0      0      0      0      0
      0      0      0      0      0      0      0      3     36    190    201     65      6      0      0      0      0      1      0      0      0
      0      0      0      0      0      0      0      2     41    189    200     76      1      0      0      2      0      0      1      1      1
      0      0      0      0      0      0      0      0      7     65     76     10      2      0      0      0      0      0      0      0      0
      0      0      0      0      0      0      0      0      0      0      0      0      0      0     -1      0      0      0      0      0      0
      0      0      0      0      0      0      0      0      0      0      0      0      0     -1      0      0      0      0      0      0      0
      0      0      0      0      0      0      0      0      0      0     -1      0     -1      0     -1      0      0      0      0      0      0
      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0      0
      0      0      0      0      0      0     -1      0      0     -1      0      0      0      0      0     -1      0      0      0      0      0

This is my finger resting in the middle of the touchpad.

Regards,

	Hans

Patch
diff mbox series

diff --git a/drivers/media/platform/vivid/Makefile b/drivers/media/platform/vivid/Makefile
index e8a50c506dc9..b12ad0152a3e 100644
--- a/drivers/media/platform/vivid/Makefile
+++ b/drivers/media/platform/vivid/Makefile
@@ -3,7 +3,8 @@  vivid-objs := vivid-core.o vivid-ctrls.o vivid-vid-common.o vivid-vbi-gen.o \
 		vivid-vid-cap.o vivid-vid-out.o vivid-kthread-cap.o vivid-kthread-out.o \
 		vivid-radio-rx.o vivid-radio-tx.o vivid-radio-common.o \
 		vivid-rds-gen.o vivid-sdr-cap.o vivid-vbi-cap.o vivid-vbi-out.o \
-		vivid-osd.o vivid-meta-cap.o vivid-meta-out.o
+		vivid-osd.o vivid-meta-cap.o vivid-meta-out.o \
+		vivid-kthread-touch.o vivid-touch-cap.o
 ifeq ($(CONFIG_VIDEO_VIVID_CEC),y)
   vivid-objs += vivid-cec.o
 endif
diff --git a/drivers/media/platform/vivid/vivid-core.c b/drivers/media/platform/vivid/vivid-core.c
index c184f9b0be69..656661bae04e 100644
--- a/drivers/media/platform/vivid/vivid-core.c
+++ b/drivers/media/platform/vivid/vivid-core.c
@@ -39,6 +39,7 @@ 
 #include "vivid-ctrls.h"
 #include "vivid-meta-cap.h"
 #include "vivid-meta-out.h"
+#include "vivid-touch-cap.h"
 
 #define VIVID_MODULE_NAME "vivid"
 
@@ -89,6 +90,10 @@  static int meta_out_nr[VIVID_MAX_DEVS] = { [0 ... (VIVID_MAX_DEVS - 1)] = -1 };
 module_param_array(meta_out_nr, int, NULL, 0444);
 MODULE_PARM_DESC(meta_out_nr, " videoX start number, -1 is autodetect");
 
+static int touch_cap_nr[VIVID_MAX_DEVS] = { [0 ... (VIVID_MAX_DEVS - 1)] = -1 };
+module_param_array(touch_cap_nr, int, NULL, 0444);
+MODULE_PARM_DESC(touch_cap_nr, " v4l-touchX start number, -1 is autodetect");
+
 static int ccs_cap_mode[VIVID_MAX_DEVS] = { [0 ... (VIVID_MAX_DEVS - 1)] = -1 };
 module_param_array(ccs_cap_mode, int, NULL, 0444);
 MODULE_PARM_DESC(ccs_cap_mode, " capture crop/compose/scale mode:\n"
@@ -110,10 +115,10 @@  MODULE_PARM_DESC(multiplanar, " 1 (default) creates a single planar device, 2 cr
  * vbi-out + vid-out + meta-cap
  */
 static unsigned int node_types[VIVID_MAX_DEVS] = {
-	[0 ... (VIVID_MAX_DEVS - 1)] = 0x61d3d
+	[0 ... (VIVID_MAX_DEVS - 1)] = 0xe1d3d
 };
 module_param_array(node_types, uint, NULL, 0444);
-MODULE_PARM_DESC(node_types, " node types, default is 0x61d3d. Bitmask with the following meaning:\n"
+MODULE_PARM_DESC(node_types, " node types, default is 0xe1d3d. Bitmask with the following meaning:\n"
 			     "\t\t    bit 0: Video Capture node\n"
 			     "\t\t    bit 2-3: VBI Capture node: 0 = none, 1 = raw vbi, 2 = sliced vbi, 3 = both\n"
 			     "\t\t    bit 4: Radio Receiver node\n"
@@ -123,7 +128,8 @@  MODULE_PARM_DESC(node_types, " node types, default is 0x61d3d. Bitmask with the
 			     "\t\t    bit 12: Radio Transmitter node\n"
 			     "\t\t    bit 16: Framebuffer for testing overlays\n"
 			     "\t\t    bit 17: Metadata Capture node\n"
-			     "\t\t    bit 18: Metadata Output node\n");
+			     "\t\t    bit 18: Metadata Output node\n"
+			     "\t\t    bit 19: Touch Capture node\n");
 
 /* Default: 4 inputs */
 static unsigned num_inputs[VIVID_MAX_DEVS] = { [0 ... (VIVID_MAX_DEVS - 1)] = 4 };
@@ -223,7 +229,8 @@  static int vidioc_querycap(struct file *file, void  *priv,
 		dev->vbi_cap_caps | dev->vbi_out_caps |
 		dev->radio_rx_caps | dev->radio_tx_caps |
 		dev->sdr_cap_caps | dev->meta_cap_caps |
-		dev->meta_out_caps | V4L2_CAP_DEVICE_CAPS;
+		dev->meta_out_caps | dev->touch_cap_caps |
+		V4L2_CAP_DEVICE_CAPS;
 	return 0;
 }
 
@@ -377,6 +384,8 @@  static int vidioc_g_parm(struct file *file, void *fh,
 {
 	struct video_device *vdev = video_devdata(file);
 
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_g_parm_tch(file, fh, parm);
 	if (vdev->vfl_dir == VFL_DIR_RX)
 		return vivid_vid_cap_g_parm(file, fh, parm);
 	return vivid_vid_out_g_parm(file, fh, parm);
@@ -387,6 +396,8 @@  static int vidioc_s_parm(struct file *file, void *fh,
 {
 	struct video_device *vdev = video_devdata(file);
 
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_g_parm_tch(file, fh, parm);
 	if (vdev->vfl_dir == VFL_DIR_RX)
 		return vivid_vid_cap_s_parm(file, fh, parm);
 	return -ENOTTY;
@@ -432,6 +443,94 @@  static __poll_t vivid_radio_poll(struct file *file, struct poll_table_struct *wa
 	return vivid_radio_tx_poll(file, wait);
 }
 
+static int vivid_enum_input(struct file *file, void *priv,
+			    struct v4l2_input *inp)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_enum_input_tch(file, priv, inp);
+	return vidioc_enum_input(file, priv, inp);
+}
+
+static int vivid_g_input(struct file *file, void *priv, unsigned int *i)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_g_input_tch(file, priv, i);
+	return vidioc_g_input(file, priv, i);
+}
+
+static int vivid_s_input(struct file *file, void *priv, unsigned int i)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_s_input_tch(file, priv, i);
+	return vidioc_s_input(file, priv, i);
+}
+
+static int vivid_enum_fmt_cap(struct file *file, void  *priv,
+			      struct v4l2_fmtdesc *f)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_enum_fmt_tch(file, priv, f);
+	return vivid_enum_fmt_vid(file, priv, f);
+}
+
+static int vivid_g_fmt_cap(struct file *file, void *priv,
+			   struct v4l2_format *f)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_g_fmt_tch(file, priv, f);
+	return vidioc_g_fmt_vid_cap(file, priv, f);
+}
+
+static int vivid_try_fmt_cap(struct file *file, void *priv,
+			     struct v4l2_format *f)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_g_fmt_tch(file, priv, f);
+	return vidioc_try_fmt_vid_cap(file, priv, f);
+}
+
+static int vivid_s_fmt_cap(struct file *file, void *priv,
+			   struct v4l2_format *f)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_g_fmt_tch(file, priv, f);
+	return vidioc_s_fmt_vid_cap(file, priv, f);
+}
+
+static int vivid_enum_framesizes(struct file *file, void *fh,
+				 struct v4l2_frmsizeenum *fsize)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_enum_framesizes_tch(file, fh, fsize);
+	return vidioc_enum_framesizes(file, fh, fsize);
+}
+
+static int vivid_enum_frameintervals(struct file *file, void *priv,
+				     struct v4l2_frmivalenum *fival)
+{
+	struct video_device *vdev = video_devdata(file);
+
+	if (vdev->vfl_type == VFL_TYPE_TOUCH)
+		return vivid_enum_frameintervals_tch(file, priv, fival);
+	return vidioc_enum_frameintervals(file, priv, fival);
+}
+
 static bool vivid_is_in_use(struct video_device *vdev)
 {
 	unsigned long flags;
@@ -453,7 +552,8 @@  static bool vivid_is_last_user(struct vivid_dev *dev)
 			vivid_is_in_use(&dev->radio_rx_dev) +
 			vivid_is_in_use(&dev->radio_tx_dev) +
 			vivid_is_in_use(&dev->meta_cap_dev) +
-			vivid_is_in_use(&dev->meta_out_dev);
+			vivid_is_in_use(&dev->meta_out_dev) +
+			vivid_is_in_use(&dev->touch_cap_dev);
 
 	return uses == 1;
 }
@@ -481,6 +581,7 @@  static int vivid_fop_release(struct file *file)
 		set_bit(V4L2_FL_REGISTERED, &dev->radio_tx_dev.flags);
 		set_bit(V4L2_FL_REGISTERED, &dev->meta_cap_dev.flags);
 		set_bit(V4L2_FL_REGISTERED, &dev->meta_out_dev.flags);
+		set_bit(V4L2_FL_REGISTERED, &dev->touch_cap_dev.flags);
 	}
 	mutex_unlock(&dev->mutex);
 	if (file->private_data == dev->overlay_cap_owner)
@@ -522,10 +623,10 @@  static const struct v4l2_file_operations vivid_radio_fops = {
 static const struct v4l2_ioctl_ops vivid_ioctl_ops = {
 	.vidioc_querycap		= vidioc_querycap,
 
-	.vidioc_enum_fmt_vid_cap	= vivid_enum_fmt_vid,
-	.vidioc_g_fmt_vid_cap		= vidioc_g_fmt_vid_cap,
-	.vidioc_try_fmt_vid_cap		= vidioc_try_fmt_vid_cap,
-	.vidioc_s_fmt_vid_cap		= vidioc_s_fmt_vid_cap,
+	.vidioc_enum_fmt_vid_cap	= vivid_enum_fmt_cap,
+	.vidioc_g_fmt_vid_cap		= vivid_g_fmt_cap,
+	.vidioc_try_fmt_vid_cap		= vivid_try_fmt_cap,
+	.vidioc_s_fmt_vid_cap		= vivid_s_fmt_cap,
 	.vidioc_g_fmt_vid_cap_mplane	= vidioc_g_fmt_vid_cap_mplane,
 	.vidioc_try_fmt_vid_cap_mplane	= vidioc_try_fmt_vid_cap_mplane,
 	.vidioc_s_fmt_vid_cap_mplane	= vidioc_s_fmt_vid_cap_mplane,
@@ -565,8 +666,8 @@  static const struct v4l2_ioctl_ops vivid_ioctl_ops = {
 	.vidioc_s_fmt_sdr_cap		= vidioc_s_fmt_sdr_cap,
 
 	.vidioc_overlay			= vidioc_overlay,
-	.vidioc_enum_framesizes		= vidioc_enum_framesizes,
-	.vidioc_enum_frameintervals	= vidioc_enum_frameintervals,
+	.vidioc_enum_framesizes		= vivid_enum_framesizes,
+	.vidioc_enum_frameintervals	= vivid_enum_frameintervals,
 	.vidioc_g_parm			= vidioc_g_parm,
 	.vidioc_s_parm			= vidioc_s_parm,
 
@@ -590,9 +691,9 @@  static const struct v4l2_ioctl_ops vivid_ioctl_ops = {
 	.vidioc_streamon		= vb2_ioctl_streamon,
 	.vidioc_streamoff		= vb2_ioctl_streamoff,
 
-	.vidioc_enum_input		= vidioc_enum_input,
-	.vidioc_g_input			= vidioc_g_input,
-	.vidioc_s_input			= vidioc_s_input,
+	.vidioc_enum_input		= vivid_enum_input,
+	.vidioc_g_input			= vivid_g_input,
+	.vidioc_s_input			= vivid_s_input,
 	.vidioc_s_audio			= vidioc_s_audio,
 	.vidioc_g_audio			= vidioc_g_audio,
 	.vidioc_enumaudio		= vidioc_enumaudio,
@@ -921,6 +1022,9 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 			dev->has_scaler_out ? 'Y' : 'N');
 	}
 
+	/* do we create a touch capture device */
+	dev->has_touch_cap = node_type & 0x80000;
+
 	/* end detecting feature set */
 
 	if (dev->has_vid_cap) {
@@ -994,6 +1098,10 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 		if (dev->has_audio_outputs)
 			dev->meta_out_caps |= V4L2_CAP_AUDIO;
 	}
+	/* set up the capabilities of the touch capture device */
+	if (dev->has_touch_cap)
+		dev->touch_cap_caps = V4L2_CAP_TOUCH | V4L2_CAP_VIDEO_CAPTURE |
+				      V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
 
 	ret = -ENOMEM;
 	/* initialize the test pattern generator */
@@ -1201,6 +1309,11 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 	dev->fb_cap.fmt.bytesperline = dev->src_rect.width * tpg_g_twopixelsize(&dev->tpg, 0) / 2;
 	dev->fb_cap.fmt.sizeimage = dev->src_rect.height * dev->fb_cap.fmt.bytesperline;
 
+	/* update touch configuration */
+	dev->timeperframe_tch_cap.numerator = 20;
+	dev->timeperframe_tch_cap.denominator = 10;
+	vivid_set_touch(dev, 0);
+
 	/* initialize locks */
 	spin_lock_init(&dev->slock);
 	mutex_init(&dev->mutex);
@@ -1213,6 +1326,7 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 	INIT_LIST_HEAD(&dev->sdr_cap_active);
 	INIT_LIST_HEAD(&dev->meta_cap_active);
 	INIT_LIST_HEAD(&dev->meta_out_active);
+	INIT_LIST_HEAD(&dev->touch_cap_active);
 
 	INIT_LIST_HEAD(&dev->cec_work_list);
 	spin_lock_init(&dev->cec_slock);
@@ -1294,6 +1408,15 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 			goto unreg_dev;
 	}
 
+	if (dev->has_touch_cap) {
+		/* initialize touch_cap queue */
+		ret = vivid_create_queue(dev, &dev->vb_touch_cap_q,
+					 V4L2_BUF_TYPE_VIDEO_CAPTURE, 1,
+					 &vivid_touch_cap_qops);
+		if (ret)
+			goto unreg_dev;
+	}
+
 	if (dev->has_fb) {
 		/* Create framebuffer for testing capture/output overlay */
 		ret = vivid_fb_init(dev);
@@ -1345,6 +1468,7 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 	v4l2_ctrl_handler_setup(&dev->ctrl_hdl_sdr_cap);
 	v4l2_ctrl_handler_setup(&dev->ctrl_hdl_meta_cap);
 	v4l2_ctrl_handler_setup(&dev->ctrl_hdl_meta_out);
+	v4l2_ctrl_handler_setup(&dev->ctrl_hdl_touch_cap);
 
 	/* finally start creating the device nodes */
 	if (dev->has_vid_cap) {
@@ -1635,6 +1759,35 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 			  video_device_node_name(vfd));
 	}
 
+	if (dev->has_touch_cap) {
+		vfd = &dev->touch_cap_dev;
+		snprintf(vfd->name, sizeof(vfd->name),
+			 "vivid-%03d-touch-cap", inst);
+		vfd->fops = &vivid_fops;
+		vfd->ioctl_ops = &vivid_ioctl_ops;
+		vfd->device_caps = dev->touch_cap_caps;
+		vfd->release = video_device_release_empty;
+		vfd->v4l2_dev = &dev->v4l2_dev;
+		vfd->queue = &dev->vb_touch_cap_q;
+		vfd->tvnorms = tvnorms_cap;
+		vfd->lock = &dev->mutex;
+		video_set_drvdata(vfd, dev);
+#ifdef CONFIG_MEDIA_CONTROLLER
+		dev->touch_cap_pad.flags = MEDIA_PAD_FL_SINK;
+		ret = media_entity_pads_init(&vfd->entity, 1,
+					     &dev->touch_cap_pad);
+		if (ret)
+			goto unreg_dev;
+#endif
+		ret = video_register_device(vfd, VFL_TYPE_TOUCH,
+					    touch_cap_nr[inst]);
+		if (ret < 0)
+			goto unreg_dev;
+		v4l2_info(&dev->v4l2_dev,
+			  "V4L2 touch capture device registered as %s\n",
+			  video_device_node_name(vfd));
+	}
+
 #ifdef CONFIG_MEDIA_CONTROLLER
 	/* Register the media device */
 	ret = media_device_register(&dev->mdev);
@@ -1651,6 +1804,7 @@  static int vivid_create_instance(struct platform_device *pdev, int inst)
 	return 0;
 
 unreg_dev:
+	video_unregister_device(&dev->touch_cap_dev);
 	video_unregister_device(&dev->meta_out_dev);
 	video_unregister_device(&dev->meta_cap_dev);
 	video_unregister_device(&dev->radio_tx_dev);
@@ -1778,6 +1932,11 @@  static int vivid_remove(struct platform_device *pdev)
 				  video_device_node_name(&dev->meta_out_dev));
 			video_unregister_device(&dev->meta_out_dev);
 		}
+		if (dev->has_touch_cap) {
+			v4l2_info(&dev->v4l2_dev, "unregistering %s\n",
+				  video_device_node_name(&dev->touch_cap_dev));
+			video_unregister_device(&dev->touch_cap_dev);
+		}
 		cec_unregister_adapter(dev->cec_rx_adap);
 		for (j = 0; j < MAX_OUTPUTS; j++)
 			cec_unregister_adapter(dev->cec_tx_adap[j]);
diff --git a/drivers/media/platform/vivid/vivid-core.h b/drivers/media/platform/vivid/vivid-core.h
index 59192b67231c..2e120d498fbc 100644
--- a/drivers/media/platform/vivid/vivid-core.h
+++ b/drivers/media/platform/vivid/vivid-core.h
@@ -133,6 +133,7 @@  struct vivid_dev {
 	struct media_pad		sdr_cap_pad;
 	struct media_pad		meta_cap_pad;
 	struct media_pad		meta_out_pad;
+	struct media_pad		touch_cap_pad;
 #endif
 	struct v4l2_ctrl_handler	ctrl_hdl_user_gen;
 	struct v4l2_ctrl_handler	ctrl_hdl_user_vid;
@@ -159,6 +160,8 @@  struct vivid_dev {
 	struct v4l2_ctrl_handler	ctrl_hdl_meta_cap;
 	struct video_device		meta_out_dev;
 	struct v4l2_ctrl_handler	ctrl_hdl_meta_out;
+	struct video_device		touch_cap_dev;
+	struct v4l2_ctrl_handler	ctrl_hdl_touch_cap;
 
 	spinlock_t			slock;
 	struct mutex			mutex;
@@ -173,6 +176,7 @@  struct vivid_dev {
 	u32				radio_tx_caps;
 	u32				meta_cap_caps;
 	u32				meta_out_caps;
+	u32				touch_cap_caps;
 
 	/* supported features */
 	bool				multiplanar;
@@ -201,6 +205,7 @@  struct vivid_dev {
 	bool				has_meta_cap;
 	bool				has_meta_out;
 	bool				has_tv_tuner;
+	bool				has_touch_cap;
 
 	bool				can_loop_video;
 
@@ -404,6 +409,8 @@  struct vivid_dev {
 	struct list_head		vbi_cap_active;
 	struct vb2_queue		vb_meta_cap_q;
 	struct list_head		meta_cap_active;
+	struct vb2_queue		vb_touch_cap_q;
+	struct list_head		touch_cap_active;
 
 	/* thread for generating video capture stream */
 	struct task_struct		*kthread_vid_cap;
@@ -425,6 +432,21 @@  struct vivid_dev {
 	u32				meta_cap_seq_count;
 	bool				meta_cap_streaming;
 
+	/* Touch capture */
+	struct task_struct		*kthread_touch_cap;
+	unsigned long			jiffies_touch_cap;
+	u64				touch_cap_stream_start;
+	u32				touch_cap_seq_offset;
+	bool				touch_cap_seq_resync;
+	u32				touch_cap_seq_start;
+	u32				touch_cap_seq_count;
+	bool				touch_cap_streaming;
+	struct v4l2_fract		timeperframe_tch_cap;
+	struct v4l2_pix_format		tch_format;
+	int				tch_test_pattern;
+	int				tch_index;
+	int				tch_cnt;
+
 	/* video output */
 	const struct vivid_fmt		*fmt_out;
 	struct v4l2_fract		timeperframe_vid_out;
diff --git a/drivers/media/platform/vivid/vivid-ctrls.c b/drivers/media/platform/vivid/vivid-ctrls.c
index 68e8124c7973..334130568dcb 100644
--- a/drivers/media/platform/vivid/vivid-ctrls.c
+++ b/drivers/media/platform/vivid/vivid-ctrls.c
@@ -1508,6 +1508,7 @@  int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
 	struct v4l2_ctrl_handler *hdl_sdr_cap = &dev->ctrl_hdl_sdr_cap;
 	struct v4l2_ctrl_handler *hdl_meta_cap = &dev->ctrl_hdl_meta_cap;
 	struct v4l2_ctrl_handler *hdl_meta_out = &dev->ctrl_hdl_meta_out;
+	struct v4l2_ctrl_handler *hdl_tch_cap = &dev->ctrl_hdl_touch_cap;
 
 	struct v4l2_ctrl_config vivid_ctrl_dv_timings = {
 		.ops = &vivid_vid_cap_ctrl_ops,
@@ -1551,6 +1552,8 @@  int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
 	v4l2_ctrl_new_custom(hdl_meta_cap, &vivid_ctrl_class, NULL);
 	v4l2_ctrl_handler_init(hdl_meta_out, 2);
 	v4l2_ctrl_new_custom(hdl_meta_out, &vivid_ctrl_class, NULL);
+	v4l2_ctrl_handler_init(hdl_tch_cap, 2);
+	v4l2_ctrl_new_custom(hdl_tch_cap, &vivid_ctrl_class, NULL);
 
 	/* User Controls */
 	dev->volume = v4l2_ctrl_new_std(hdl_user_aud, NULL,
@@ -1904,6 +1907,13 @@  int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap,
 			return hdl_meta_out->error;
 		dev->meta_out_dev.ctrl_handler = hdl_meta_out;
 	}
+	if (dev->has_touch_cap) {
+		v4l2_ctrl_add_handler(hdl_tch_cap, hdl_user_gen, NULL, false);
+		v4l2_ctrl_add_handler(hdl_tch_cap, hdl_streaming, NULL, false);
+		if (hdl_tch_cap->error)
+			return hdl_tch_cap->error;
+		dev->touch_cap_dev.ctrl_handler = hdl_tch_cap;
+	}
 	return 0;
 }
 
@@ -1925,4 +1935,5 @@  void vivid_free_controls(struct vivid_dev *dev)
 	v4l2_ctrl_handler_free(&dev->ctrl_hdl_fb);
 	v4l2_ctrl_handler_free(&dev->ctrl_hdl_meta_cap);
 	v4l2_ctrl_handler_free(&dev->ctrl_hdl_meta_out);
+	v4l2_ctrl_handler_free(&dev->ctrl_hdl_touch_cap);
 }
diff --git a/drivers/media/platform/vivid/vivid-kthread-touch.c b/drivers/media/platform/vivid/vivid-kthread-touch.c
new file mode 100644
index 000000000000..3cb82f68bf73
--- /dev/null
+++ b/drivers/media/platform/vivid/vivid-kthread-touch.c
@@ -0,0 +1,187 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vivid-kthread-touch.c - touch capture thread support functions.
+ *
+ */
+
+#include <linux/freezer.h>
+#include "vivid-core.h"
+#include "vivid-kthread-touch.h"
+#include "vivid-touch-cap.h"
+
+static noinline_for_stack void vivid_thread_tch_cap_tick(struct vivid_dev *dev,
+							 int dropped_bufs)
+{
+	struct vivid_buffer *tch_cap_buf = NULL;
+
+	dprintk(dev, 1, "Touch Capture Thread Tick\n");
+
+	spin_lock(&dev->slock);
+	if (!list_empty(&dev->touch_cap_active)) {
+		tch_cap_buf = list_entry(dev->touch_cap_active.next,
+					 struct vivid_buffer, list);
+		list_del(&tch_cap_buf->list);
+	}
+
+	spin_unlock(&dev->slock);
+
+	if (tch_cap_buf) {
+		v4l2_ctrl_request_setup(tch_cap_buf->vb.vb2_buf.req_obj.req,
+					&dev->ctrl_hdl_touch_cap);
+
+		vivid_fillbuff_tch(dev, tch_cap_buf);
+		v4l2_ctrl_request_complete(tch_cap_buf->vb.vb2_buf.req_obj.req,
+					   &dev->ctrl_hdl_touch_cap);
+		vb2_buffer_done(&tch_cap_buf->vb.vb2_buf, dev->dqbuf_error ?
+				VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
+		dprintk(dev, 2, "touch_cap buffer %d done\n",
+			tch_cap_buf->vb.vb2_buf.index);
+
+		tch_cap_buf->vb.vb2_buf.timestamp = ktime_get_ns() + dev->time_wrap_offset;
+	}
+	dev->dqbuf_error = false;
+}
+
+static int vivid_thread_touch_cap(void *data)
+{
+	struct vivid_dev *dev = data;
+	u64 numerators_since_start;
+	u64 buffers_since_start;
+	u64 next_jiffies_since_start;
+	unsigned long jiffies_since_start;
+	unsigned long cur_jiffies;
+	unsigned int wait_jiffies;
+	unsigned int numerator;
+	unsigned int denominator;
+	int dropped_bufs;
+
+	dprintk(dev, 1, "Touch Capture Thread Start\n");
+
+	set_freezable();
+
+	/* Resets frame counters */
+	dev->touch_cap_seq_offset = 0;
+	dev->touch_cap_seq_count = 0;
+	dev->touch_cap_seq_resync = false;
+	dev->jiffies_touch_cap = jiffies;
+
+	for (;;) {
+		try_to_freeze();
+		if (kthread_should_stop())
+			break;
+
+		if (!mutex_trylock(&dev->mutex)) {
+			schedule_timeout_uninterruptible(1);
+			continue;
+		}
+		cur_jiffies = jiffies;
+		if (dev->touch_cap_seq_resync) {
+			dev->jiffies_touch_cap = cur_jiffies;
+			dev->touch_cap_seq_offset = dev->touch_cap_seq_count + 1;
+			dev->touch_cap_seq_count = 0;
+			dev->cap_seq_resync = false;
+		}
+		denominator = dev->timeperframe_tch_cap.denominator;
+		numerator = dev->timeperframe_tch_cap.numerator;
+
+		/* Calculate the number of jiffies since we started streaming */
+		jiffies_since_start = cur_jiffies - dev->jiffies_touch_cap;
+		/* Get the number of buffers streamed since the start */
+		buffers_since_start = (u64)jiffies_since_start * denominator +
+				      (HZ * numerator) / 2;
+		do_div(buffers_since_start, HZ * numerator);
+
+		/*
+		 * After more than 0xf0000000 (rounded down to a multiple of
+		 * 'jiffies-per-day' to ease jiffies_to_msecs calculation)
+		 * jiffies have passed since we started streaming reset the
+		 * counters and keep track of the sequence offset.
+		 */
+		if (jiffies_since_start > JIFFIES_RESYNC) {
+			dev->jiffies_touch_cap = cur_jiffies;
+			dev->cap_seq_offset = buffers_since_start;
+			buffers_since_start = 0;
+		}
+		dropped_bufs = buffers_since_start + dev->touch_cap_seq_offset - dev->touch_cap_seq_count;
+		dev->touch_cap_seq_count = buffers_since_start + dev->touch_cap_seq_offset;
+
+		vivid_thread_tch_cap_tick(dev, dropped_bufs);
+
+		/*
+		 * Calculate the number of 'numerators' streamed
+		 * since we started, including the current buffer.
+		 */
+		numerators_since_start = ++buffers_since_start * numerator;
+
+		/* And the number of jiffies since we started */
+		jiffies_since_start = jiffies - dev->jiffies_touch_cap;
+
+		mutex_unlock(&dev->mutex);
+
+		/*
+		 * Calculate when that next buffer is supposed to start
+		 * in jiffies since we started streaming.
+		 */
+		next_jiffies_since_start = numerators_since_start * HZ +
+					   denominator / 2;
+		do_div(next_jiffies_since_start, denominator);
+		/* If it is in the past, then just schedule asap */
+		if (next_jiffies_since_start < jiffies_since_start)
+			next_jiffies_since_start = jiffies_since_start;
+
+		wait_jiffies = next_jiffies_since_start - jiffies_since_start;
+		schedule_timeout_interruptible(wait_jiffies ? wait_jiffies : 1);
+	}
+	dprintk(dev, 1, "Touch Capture Thread End\n");
+	return 0;
+}
+
+int vivid_start_generating_touch_cap(struct vivid_dev *dev)
+{
+	dprintk(dev, 1, "%s\n", __func__);
+
+	if (dev->kthread_touch_cap) {
+		dev->touch_cap_streaming = true;
+		return 0;
+	}
+
+	dev->kthread_touch_cap = kthread_run(vivid_thread_touch_cap, dev,
+					     "%s-tch-cap", dev->v4l2_dev.name);
+
+	if (IS_ERR(dev->kthread_touch_cap)) {
+		int err = PTR_ERR(dev->kthread_touch_cap);
+
+		dev->kthread_touch_cap = NULL;
+		v4l2_err(&dev->v4l2_dev, "kernel_thread() failed\n");
+		return err;
+	}
+	dev->touch_cap_streaming = true;
+	dprintk(dev, 1, "returning from %s\n", __func__);
+	return 0;
+}
+
+void vivid_stop_generating_touch_cap(struct vivid_dev *dev)
+{
+	dprintk(dev, 1, "%s\n", __func__);
+
+	if (!dev->kthread_touch_cap)
+		return;
+
+	dev->touch_cap_streaming = false;
+
+	while (!list_empty(&dev->touch_cap_active)) {
+		struct vivid_buffer *buf;
+
+		buf = list_entry(dev->touch_cap_active.next,
+				 struct vivid_buffer, list);
+		list_del(&buf->list);
+		v4l2_ctrl_request_complete(buf->vb.vb2_buf.req_obj.req,
+					   &dev->ctrl_hdl_touch_cap);
+		vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+		dprintk(dev, 2, "touch_cap buffer %d done\n",
+			buf->vb.vb2_buf.index);
+	}
+
+	kthread_stop(dev->kthread_touch_cap);
+	dev->kthread_touch_cap = NULL;
+}
diff --git a/drivers/media/platform/vivid/vivid-kthread-touch.h b/drivers/media/platform/vivid/vivid-kthread-touch.h
new file mode 100644
index 000000000000..ecf79b46209e
--- /dev/null
+++ b/drivers/media/platform/vivid/vivid-kthread-touch.h
@@ -0,0 +1,13 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * vivid-kthread-cap.h - video/vbi capture thread support functions.
+ *
+ */
+
+#ifndef _VIVID_KTHREAD_CAP_H_
+#define _VIVID_KTHREAD_CAP_H_
+
+int vivid_start_generating_touch_cap(struct vivid_dev *dev);
+void vivid_stop_generating_touch_cap(struct vivid_dev *dev);
+
+#endif
diff --git a/drivers/media/platform/vivid/vivid-touch-cap.c b/drivers/media/platform/vivid/vivid-touch-cap.c
new file mode 100644
index 000000000000..c49111a881b5
--- /dev/null
+++ b/drivers/media/platform/vivid/vivid-touch-cap.c
@@ -0,0 +1,324 @@ 
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * vivid-touch-cap.c - touch support functions.
+ */
+
+#include "vivid-core.h"
+#include "vivid-kthread-touch.h"
+#include "vivid-touch-cap.h"
+
+static int touch_cap_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers,
+				 unsigned int *nplanes, unsigned int sizes[],
+				 struct device *alloc_devs[])
+{
+	struct vivid_dev *dev = vb2_get_drv_priv(vq);
+	struct v4l2_pix_format *f = &dev->tch_format;
+	unsigned int size = f->sizeimage;
+
+	if (*nplanes) {
+		if (sizes[0] < size)
+			return -EINVAL;
+	} else {
+		sizes[0] = size;
+	}
+
+	if (vq->num_buffers + *nbuffers < 2)
+		*nbuffers = 2 - vq->num_buffers;
+
+	*nplanes = 1;
+	return 0;
+}
+
+static int touch_cap_buf_prepare(struct vb2_buffer *vb)
+{
+	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
+	struct v4l2_pix_format *f = &dev->tch_format;
+	unsigned int size = f->sizeimage;
+
+	dprintk(dev, 1, "%s\n", __func__);
+
+	if (dev->buf_prepare_error) {
+		/*
+		 * Error injection: test what happens if buf_prepare() returns
+		 * an error.
+		 */
+		dev->buf_prepare_error = false;
+		return -EINVAL;
+	}
+	if (vb2_plane_size(vb, 0) < size) {
+		dprintk(dev, 1, "%s data will not fit into plane (%lu < %u)\n",
+			__func__, vb2_plane_size(vb, 0), size);
+		return -EINVAL;
+	}
+	vb2_set_plane_payload(vb, 0, size);
+
+	return 0;
+}
+
+static void touch_cap_buf_queue(struct vb2_buffer *vb)
+{
+	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
+	struct vivid_buffer *buf = container_of(vbuf, struct vivid_buffer, vb);
+
+	dprintk(dev, 1, "%s\n", __func__);
+
+	spin_lock(&dev->slock);
+	list_add_tail(&buf->list, &dev->touch_cap_active);
+	spin_unlock(&dev->slock);
+}
+
+static int touch_cap_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+	struct vivid_dev *dev = vb2_get_drv_priv(vq);
+	int err;
+
+	dprintk(dev, 1, "%s\n", __func__);
+	dev->touch_cap_seq_count = 0;
+	dev->tch_test_pattern = SINGLE_TAP;
+	dev->tch_cnt = 1;
+	if (dev->start_streaming_error) {
+		dev->start_streaming_error = false;
+		err = -EINVAL;
+	} else {
+		err = vivid_start_generating_touch_cap(dev);
+	}
+	if (err) {
+		struct vivid_buffer *buf, *tmp;
+
+		list_for_each_entry_safe(buf, tmp,
+					 &dev->touch_cap_active, list) {
+			list_del(&buf->list);
+			vb2_buffer_done(&buf->vb.vb2_buf,
+					VB2_BUF_STATE_QUEUED);
+		}
+	}
+	return err;
+}
+
+/* abort streaming and wait for last buffer */
+static void touch_cap_stop_streaming(struct vb2_queue *vq)
+{
+	struct vivid_dev *dev = vb2_get_drv_priv(vq);
+
+	dprintk(dev, 1, "%s\n", __func__);
+	vivid_stop_generating_touch_cap(dev);
+}
+
+static void touch_cap_buf_request_complete(struct vb2_buffer *vb)
+{
+	struct vivid_dev *dev = vb2_get_drv_priv(vb->vb2_queue);
+
+	v4l2_ctrl_request_complete(vb->req_obj.req, &dev->ctrl_hdl_touch_cap);
+}
+
+const struct vb2_ops vivid_touch_cap_qops = {
+	.queue_setup		= touch_cap_queue_setup,
+	.buf_prepare		= touch_cap_buf_prepare,
+	.buf_queue		= touch_cap_buf_queue,
+	.start_streaming	= touch_cap_start_streaming,
+	.stop_streaming		= touch_cap_stop_streaming,
+	.buf_request_complete	= touch_cap_buf_request_complete,
+	.wait_prepare		= vb2_ops_wait_prepare,
+	.wait_finish		= vb2_ops_wait_finish,
+};
+
+int vivid_enum_fmt_tch(struct file *file, void  *priv, struct v4l2_fmtdesc *f)
+{
+	struct vivid_dev *dev = video_drvdata(file);
+
+	if (f->index)
+		return -EINVAL;
+
+	dprintk(dev, 1, "%s\n", __func__);
+
+	f->pixelformat = V4L2_TCH_FMT_TU16;
+	return 0;
+}
+
+int vivid_g_fmt_tch(struct file *file, void *priv, struct v4l2_format *f)
+{
+	struct vivid_dev *dev = video_drvdata(file);
+
+	dprintk(dev, 1, "%s\n", __func__);
+
+	f->fmt.pix = dev->tch_format;
+	return 0;
+}
+
+int vivid_g_parm_tch(struct file *file, void *priv,
+		     struct v4l2_streamparm *parm)
+{
+	struct vivid_dev *dev = video_drvdata(file);
+
+	dprintk(dev, 1, "%s\n", __func__);
+
+	if (parm->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
+		return -EINVAL;
+
+	parm->parm.capture.capability   = V4L2_CAP_TIMEPERFRAME;
+	parm->parm.capture.timeperframe = dev->timeperframe_tch_cap;
+	parm->parm.capture.readbuffers  = 1;
+	return 0;
+}
+
+int vivid_enum_input_tch(struct file *file, void *priv, struct v4l2_input *inp)
+{
+	struct vivid_dev *dev = video_drvdata(file);
+
+	dprintk(dev, 1, "%s\n", __func__);
+
+	if (inp->index)
+		return -EINVAL;
+
+	inp->type = V4L2_INPUT_TYPE_TOUCH;
+	snprintf(inp->name, sizeof(inp->name), "Vivid Touch %u",
+		 dev->input_name_counter[inp->index]);
+	inp->capabilities = 0;
+	return 0;
+}
+
+int vivid_g_input_tch(struct file *file, void *priv, unsigned int *i)
+{
+	*i = 0;
+	return 0;
+}
+
+int vivid_set_touch(struct vivid_dev *dev, unsigned int i)
+{
+	struct v4l2_pix_format *f = &dev->tch_format;
+
+	if (i)
+		return -EINVAL;
+
+	f->pixelformat = V4L2_TCH_FMT_TU16;
+	f->width =  VIVID_TCH_WIDTH;
+	f->height = VIVID_TCH_HEIGHT;
+	f->field = V4L2_FIELD_NONE;
+	f->colorspace = V4L2_COLORSPACE_RAW;
+	f->bytesperline = f->width * sizeof(u16);
+	f->sizeimage = f->width * f->height * sizeof(u16);
+	return 0;
+}
+
+int vivid_s_input_tch(struct file *file, void *priv, unsigned int i)
+{
+	return vivid_set_touch(video_drvdata(file), i);
+}
+
+int vivid_enum_frameintervals_tch(struct file *file, void *priv,
+				  struct v4l2_frmivalenum *fival)
+{
+	struct vivid_dev *dev = video_drvdata(file);
+	struct v4l2_pix_format *f = &dev->tch_format;
+
+	if (fival->index)
+		return -EINVAL;
+	if (fival->width != f->width ||
+	    fival->height != f->height)
+		return -EINVAL;
+
+	fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
+	fival->discrete = dev->timeperframe_tch_cap;
+	return 0;
+}
+
+int vivid_enum_framesizes_tch(struct file *file, void *fh,
+			      struct v4l2_frmsizeenum *fsize)
+{
+	struct vivid_dev *dev = video_drvdata(file);
+	struct v4l2_pix_format *f = &dev->tch_format;
+
+	if (fsize->index)
+		return -EINVAL;
+	if (fsize->pixel_format != V4L2_TCH_FMT_TU16)
+		return -EINVAL;
+
+	fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+	fsize->discrete.width  = f->width;
+	fsize->discrete.height = f->height;
+	return 0;
+}
+
+void vivid_fillbuff_tch(struct vivid_dev *dev, struct vivid_buffer *buf)
+{
+	struct v4l2_pix_format *f = &dev->tch_format;
+	int size = f->width * f->height;
+	int index = 0, x, y, xstart, ystart;
+	__u16 *tch_buf = vb2_plane_vaddr(&buf->vb.vb2_buf, 0);
+
+	buf->vb.sequence = dev->touch_cap_seq_count;
+
+	memset(tch_buf, 0, vb2_plane_size(&buf->vb.vb2_buf, 0));
+
+	switch (dev->tch_test_pattern) {
+	case SINGLE_TAP:
+	case DOUBLE_TAP:
+	case TRIPLE_TAP:
+		if (dev->tch_cnt == 1)
+			dev->tch_index = get_random_int() % size;
+		if (dev->tch_cnt % 2)
+			tch_buf[dev->tch_index] = get_random_int() % VIVID_MAX_PRESSURE;
+		dev->tch_cnt++;
+		if (dev->tch_cnt > dev->tch_test_pattern * 2) {
+			dev->tch_test_pattern++;
+			dev->tch_cnt = 1;
+		}
+		break;
+	case MOVE_LEFT_TO_RIGHT:
+		x = get_random_int() % f->width;
+		for (index = x; index < f->width ; index++)
+			tch_buf[index] = get_random_int() % VIVID_MAX_PRESSURE;
+		dev->tch_test_pattern++;
+		dev->tch_index = 0;
+		break;
+	case ZOOM_IN:
+	case ZOOM_OUT:
+		x = f->width / 2;
+		y = f->height/ 2;
+		if (!dev->tch_index) {
+			index = x + f->width * y;
+			tch_buf[index] = get_random_int() % VIVID_MAX_PRESSURE;
+			if (dev->tch_test_pattern == ZOOM_OUT)
+				dev->tch_test_pattern++;
+		} else {
+			index = (x - dev->tch_index) + f->width * (y - dev->tch_index);
+			tch_buf[index] = get_random_int() % VIVID_MAX_PRESSURE;
+			index = (x + dev->tch_index) + f->width * (y + dev->tch_index);
+			tch_buf[index] = get_random_int() % VIVID_MAX_PRESSURE;
+		}
+		if (dev->tch_test_pattern == ZOOM_IN) {
+			dev->tch_index++;
+			if (x + dev->tch_index >= f->width ||
+			    y + dev->tch_index >= f->height)
+				dev->tch_test_pattern++;
+		}
+		if (dev->tch_test_pattern == ZOOM_OUT)
+			dev->tch_index--;
+		break;
+	case PALM_PRESS:
+		xstart = f->width - f->width / 4;
+		ystart = f->height - f->height / 4;
+		for (x = xstart; x < f->width; x++) {
+			for (y = ystart; y < f->height; y++) {
+				index = x + f->width * y;
+				tch_buf[index] = get_random_int() % VIVID_MAX_PRESSURE;
+			}
+		}
+		dev->tch_test_pattern++;
+		break;
+	case MULTIPLE_PRESS:
+		/*16 pressure points*/
+		for (x = 0; x < 16; x++) {
+			index = get_random_int() % size;
+			tch_buf[index] = get_random_int() % VIVID_MAX_PRESSURE;
+		}
+		dev->tch_test_pattern++;
+		break;
+	}
+
+	if (dev->tch_test_pattern == TEST_CASE_MAX) {
+		dev->tch_test_pattern = SINGLE_TAP;
+		dev->tch_cnt = 1;
+	}
+}
diff --git a/drivers/media/platform/vivid/vivid-touch-cap.h b/drivers/media/platform/vivid/vivid-touch-cap.h
new file mode 100644
index 000000000000..72a9a52c41ea
--- /dev/null
+++ b/drivers/media/platform/vivid/vivid-touch-cap.h
@@ -0,0 +1,39 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * vivid-touch-cap.h - touch support functions.
+ */
+#ifndef _VIVID_TOUCH_CAP_H_
+#define _VIVID_TOUCH_CAP_H_
+
+#define VIVID_TCH_HEIGHT	24
+#define VIVID_TCH_WIDTH		14
+#define VIVID_MAX_PRESSURE	65535
+
+enum vivid_tch_test {
+	SINGLE_TAP = 1,
+	DOUBLE_TAP,
+	TRIPLE_TAP,
+	MOVE_LEFT_TO_RIGHT,
+	ZOOM_IN,
+	ZOOM_OUT,
+	PALM_PRESS,
+	MULTIPLE_PRESS,
+	TEST_CASE_MAX
+};
+
+extern const struct vb2_ops vivid_touch_cap_qops;
+
+int vivid_enum_fmt_tch(struct file *file, void  *priv, struct v4l2_fmtdesc *f);
+int vivid_g_fmt_tch(struct file *file, void *priv, struct v4l2_format *f);
+int vivid_enum_input_tch(struct file *file, void *priv, struct v4l2_input *inp);
+int vivid_g_input_tch(struct file *file, void *priv, unsigned int *i);
+int vivid_s_input_tch(struct file *file, void *priv, unsigned int i);
+void vivid_fillbuff_tch(struct vivid_dev *dev, struct vivid_buffer *buf);
+int vivid_set_touch(struct vivid_dev *dev, unsigned int i);
+int vivid_g_parm_tch(struct file *file, void *priv,
+		     struct v4l2_streamparm *parm);
+int vivid_enum_frameintervals_tch(struct file *file, void *priv,
+				  struct v4l2_frmivalenum *fival);
+int vivid_enum_framesizes_tch(struct file *file, void *fh,
+			      struct v4l2_frmsizeenum *fsize);
+#endif