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proximity: Read near level from udev property

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The levels are sensor dependend and are also affected by how the sensor
is built into the device (e.g. the distance to the cover glass).

Android even does this in sensor specific code. Android x86 works
around this by using setprop:

https://groups.google.com/forum/#!topic/android-x86/RFXYW5MNCuk
This commit is contained in:
Guido Günther
2020-02-10 11:50:09 +01:00
committed by Bastien Nocera
parent 7024b9c45a
commit 11778ab603
1 changed files with 27 additions and 4 deletions
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31
src/drv-iio-poll-proximity.c
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@@ -16,8 +16,7 @@
#include <stdio.h>
#include <stdlib.h>
/* FIXME: This needs to come from udev since it's device dependent */
#define NEAR_LEVEL 200
#define PROXIMITY_NEAR_LEVEL "PROXIMITY_NEAR_LEVEL"
typedef struct DrvData {
guint timeout_id;
@@ -25,6 +24,7 @@ typedef struct DrvData {
gpointer user_data;
GUdevDevice *dev;
const char *name;
gint near_level;
} DrvData;
static DrvData *drv_data = NULL;
@@ -57,8 +57,8 @@ poll_proximity (gpointer user_data)
/* g_udev_device_get_sysfs_attr_as_int does not update when there's no event */
prox = sysfs_get_int (data->dev, "in_proximity_raw");
readings.is_near = (prox > NEAR_LEVEL) ? TRUE : FALSE;
g_debug ("Proximity read from IIO on '%s': %d, near: %d", data->name, prox, readings.is_near);
readings.is_near = (prox > data->near_level) ? PROXIMITY_NEAR_TRUE : PROXIMITY_NEAR_FALSE;
g_debug ("Proximity read from IIO on '%s': %d/%d, near: %d", data->name, prox, data->near_level, readings.is_near);
drv_data->callback_func (&iio_poll_proximity, (gpointer) &readings, drv_data->user_data);
@@ -91,6 +91,23 @@ iio_poll_proximity_set_polling (gboolean state)
}
}
static gint
get_near_level (GUdevDevice *device)
{
gint near_level;
near_level = g_udev_device_get_property_as_int (device, PROXIMITY_NEAR_LEVEL);
if (!near_level) {
g_warning ("Found proximity sensor but no " PROXIMITY_NEAR_LEVEL " udev property");
g_warning ("See https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/blob/master/README.md");
return 0;
}
g_debug ("Near level: %d", near_level);
return near_level;
}
static gboolean
iio_poll_proximity_open (GUdevDevice *device,
ReadingsUpdateFunc callback_func,
@@ -103,6 +120,12 @@ iio_poll_proximity_open (GUdevDevice *device,
drv_data->name = g_udev_device_get_sysfs_attr (device, "name");
drv_data->callback_func = callback_func;
drv_data->user_data = user_data;
drv_data->near_level = get_near_level (device);
if (!drv_data->near_level) {
g_free (drv_data);
return FALSE;
}
return TRUE;
}