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Date: Thu, 17 Oct 2019 13:41:56 -0700
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: linux-input@...r.kernel.org
Cc: Allison Randal <allison@...utok.net>,
Anders Roxell <anders.roxell@...aro.org>,
Eric Anholt <eric@...olt.net>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Jeff LaBundy <jeff@...undy.com>,
Martin Kepplinger <martink@...teo.de>,
Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
linux-kernel@...r.kernel.org
Subject: [PATCH 02/22] Input: sur40 - switch to using polled mode of input devices
We have added polled mode to the normal input devices with the intent of
retiring input_polled_dev. This converts sur40 driver to use the
polling mode of standard input devices and removes dependency on
INPUT_POLLDEV.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
drivers/input/touchscreen/Kconfig | 1 -
drivers/input/touchscreen/sur40.c | 92 ++++++++++++++++++-------------
2 files changed, 53 insertions(+), 40 deletions(-)
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 00e7a9f218bc..df9cb92166c3 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1209,7 +1209,6 @@ config TOUCHSCREEN_SUR40
tristate "Samsung SUR40 (Surface 2.0/PixelSense) touchscreen"
depends on USB && MEDIA_USB_SUPPORT && HAS_DMA
depends on VIDEO_V4L2
- select INPUT_POLLDEV
select VIDEOBUF2_DMA_SG
help
Say Y here if you want support for the Samsung SUR40 touchscreen
diff --git a/drivers/input/touchscreen/sur40.c b/drivers/input/touchscreen/sur40.c
index 00cb1ba2d364..04638900fe0e 100644
--- a/drivers/input/touchscreen/sur40.c
+++ b/drivers/input/touchscreen/sur40.c
@@ -27,7 +27,7 @@
#include <linux/uaccess.h>
#include <linux/usb.h>
#include <linux/printk.h>
-#include <linux/input-polldev.h>
+#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/usb/input.h>
#include <linux/videodev2.h>
@@ -206,7 +206,7 @@ struct sur40_state {
struct usb_device *usbdev;
struct device *dev;
- struct input_polled_dev *input;
+ struct input_dev *input;
struct v4l2_device v4l2;
struct video_device vdev;
@@ -370,6 +370,10 @@ static int sur40_init(struct sur40_state *dev)
goto error;
result = sur40_command(dev, SUR40_GET_VERSION, 0x03, buffer, 12);
+ if (result < 0)
+ goto error;
+
+ result = 0;
/*
* Discard the result buffer - no known data inside except
@@ -381,22 +385,22 @@ static int sur40_init(struct sur40_state *dev)
}
/*
- * Callback routines from input_polled_dev
+ * Callback routines from input_dev
*/
/* Enable the device, polling will now start. */
-static void sur40_open(struct input_polled_dev *polldev)
+static int sur40_open(struct input_dev *input)
{
- struct sur40_state *sur40 = polldev->private;
+ struct sur40_state *sur40 = input_get_drvdata(input);
dev_dbg(sur40->dev, "open\n");
- sur40_init(sur40);
+ return sur40_init(sur40);
}
/* Disable device, polling has stopped. */
-static void sur40_close(struct input_polled_dev *polldev)
+static void sur40_close(struct input_dev *input)
{
- struct sur40_state *sur40 = polldev->private;
+ struct sur40_state *sur40 = input_get_drvdata(input);
dev_dbg(sur40->dev, "close\n");
/*
@@ -448,10 +452,9 @@ static void sur40_report_blob(struct sur40_blob *blob, struct input_dev *input)
}
/* core function: poll for new input data */
-static void sur40_poll(struct input_polled_dev *polldev)
+static void sur40_poll(struct input_dev *input)
{
- struct sur40_state *sur40 = polldev->private;
- struct input_dev *input = polldev->input;
+ struct sur40_state *sur40 = input_get_drvdata(input);
int result, bulk_read, need_blobs, packet_blobs, i;
u32 uninitialized_var(packet_id);
@@ -613,10 +616,9 @@ static void sur40_process_video(struct sur40_state *sur40)
}
/* Initialize input device parameters. */
-static void sur40_input_setup(struct input_dev *input_dev)
+static int sur40_input_setup_events(struct input_dev *input_dev)
{
- __set_bit(EV_KEY, input_dev->evbit);
- __set_bit(EV_ABS, input_dev->evbit);
+ int error;
input_set_abs_params(input_dev, ABS_MT_POSITION_X,
0, SENSOR_RES_X, 0, 0);
@@ -637,8 +639,14 @@ static void sur40_input_setup(struct input_dev *input_dev)
input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
- input_mt_init_slots(input_dev, MAX_CONTACTS,
- INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+ error = input_mt_init_slots(input_dev, MAX_CONTACTS,
+ INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
+ if (error) {
+ dev_err(input_dev->dev.parent, "failed to set up slots\n");
+ return error;
+ }
+
+ return 0;
}
/* Check candidate USB interface. */
@@ -649,7 +657,7 @@ static int sur40_probe(struct usb_interface *interface,
struct sur40_state *sur40;
struct usb_host_interface *iface_desc;
struct usb_endpoint_descriptor *endpoint;
- struct input_polled_dev *poll_dev;
+ struct input_dev *input;
int error;
/* Check if we really have the right interface. */
@@ -670,8 +678,8 @@ static int sur40_probe(struct usb_interface *interface,
if (!sur40)
return -ENOMEM;
- poll_dev = input_allocate_polled_device();
- if (!poll_dev) {
+ input = input_allocate_device();
+ if (!input) {
error = -ENOMEM;
goto err_free_dev;
}
@@ -681,26 +689,33 @@ static int sur40_probe(struct usb_interface *interface,
spin_lock_init(&sur40->qlock);
mutex_init(&sur40->lock);
- /* Set up polled input device control structure */
- poll_dev->private = sur40;
- poll_dev->poll_interval = POLL_INTERVAL;
- poll_dev->open = sur40_open;
- poll_dev->poll = sur40_poll;
- poll_dev->close = sur40_close;
-
/* Set up regular input device structure */
- sur40_input_setup(poll_dev->input);
-
- poll_dev->input->name = DRIVER_LONG;
- usb_to_input_id(usbdev, &poll_dev->input->id);
+ input->name = DRIVER_LONG;
+ usb_to_input_id(usbdev, &input->id);
usb_make_path(usbdev, sur40->phys, sizeof(sur40->phys));
strlcat(sur40->phys, "/input0", sizeof(sur40->phys));
- poll_dev->input->phys = sur40->phys;
- poll_dev->input->dev.parent = &interface->dev;
+ input->phys = sur40->phys;
+ input->dev.parent = &interface->dev;
+
+ input->open = sur40_open;
+ input->close = sur40_close;
+
+ error = sur40_input_setup_events(input);
+ if (error)
+ goto err_free_input;
+
+ input_set_drvdata(input, sur40);
+ error = input_setup_polling(input, sur40_poll);
+ if (error) {
+ dev_err(&interface->dev, "failed to set up polling");
+ goto err_free_input;
+ }
+
+ input_set_poll_interval(input, POLL_INTERVAL);
sur40->usbdev = usbdev;
sur40->dev = &interface->dev;
- sur40->input = poll_dev;
+ sur40->input = input;
/* use the bulk-in endpoint tested above */
sur40->bulk_in_size = usb_endpoint_maxp(endpoint);
@@ -709,11 +724,11 @@ static int sur40_probe(struct usb_interface *interface,
if (!sur40->bulk_in_buffer) {
dev_err(&interface->dev, "Unable to allocate input buffer.");
error = -ENOMEM;
- goto err_free_polldev;
+ goto err_free_input;
}
/* register the polled input device */
- error = input_register_polled_device(poll_dev);
+ error = input_register_device(input);
if (error) {
dev_err(&interface->dev,
"Unable to register polled input device.");
@@ -796,8 +811,8 @@ static int sur40_probe(struct usb_interface *interface,
v4l2_device_unregister(&sur40->v4l2);
err_free_buffer:
kfree(sur40->bulk_in_buffer);
-err_free_polldev:
- input_free_polled_device(sur40->input);
+err_free_input:
+ input_free_device(input);
err_free_dev:
kfree(sur40);
@@ -813,8 +828,7 @@ static void sur40_disconnect(struct usb_interface *interface)
video_unregister_device(&sur40->vdev);
v4l2_device_unregister(&sur40->v4l2);
- input_unregister_polled_device(sur40->input);
- input_free_polled_device(sur40->input);
+ input_unregister_device(sur40->input);
kfree(sur40->bulk_in_buffer);
kfree(sur40);
--
2.23.0.866.gb869b98d4c-goog
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