V4L/DVB (7089): V4L: stkwebcam: Power management support
Signed-off-by: Jaime Velasco Juan <jsagarribay@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/stk-webcam.c b/drivers/media/video/stk-webcam.c
index ba4fe93..f84e8d5 100644
--- a/drivers/media/video/stk-webcam.c
+++ b/drivers/media/video/stk-webcam.c
@@ -682,6 +682,7 @@
return -ENXIO;
fp->private_data = vdev;
kref_get(&dev->kref);
+ usb_autopm_get_interface(dev->interface);
return 0;
}
@@ -703,6 +704,7 @@
}
if (dev->owner != fp) {
+ usb_autopm_put_interface(dev->interface);
kref_put(&dev->kref, stk_camera_cleanup);
return 0;
}
@@ -713,6 +715,7 @@
dev->owner = NULL;
+ usb_autopm_put_interface(dev->interface);
kref_put(&dev->kref, stk_camera_cleanup);
return 0;
@@ -1085,6 +1088,42 @@
return 0;
}
+static int stk_setup_format(struct stk_camera *dev)
+{
+ int i = 0;
+ int depth;
+ if (dev->vsettings.palette == V4L2_PIX_FMT_SBGGR8)
+ depth = 1;
+ else
+ depth = 2;
+ while (stk_sizes[i].m != dev->vsettings.mode
+ && i < ARRAY_SIZE(stk_sizes))
+ i++;
+ if (i == ARRAY_SIZE(stk_sizes)) {
+ STK_ERROR("Something is broken in %s\n", __FUNCTION__);
+ return -EFAULT;
+ }
+ /* This registers controls some timings, not sure of what. */
+ stk_camera_write_reg(dev, 0x001b, 0x0e);
+ if (dev->vsettings.mode == MODE_SXGA)
+ stk_camera_write_reg(dev, 0x001c, 0x0e);
+ else
+ stk_camera_write_reg(dev, 0x001c, 0x46);
+ /*
+ * Registers 0x0115 0x0114 are the size of each line (bytes),
+ * regs 0x0117 0x0116 are the heigth of the image.
+ */
+ stk_camera_write_reg(dev, 0x0115,
+ ((stk_sizes[i].w * depth) >> 8) & 0xff);
+ stk_camera_write_reg(dev, 0x0114,
+ (stk_sizes[i].w * depth) & 0xff);
+ stk_camera_write_reg(dev, 0x0117,
+ (stk_sizes[i].h >> 8) & 0xff);
+ stk_camera_write_reg(dev, 0x0116,
+ stk_sizes[i].h & 0xff);
+ return stk_sensor_configure(dev);
+}
+
static int stk_vidioc_s_fmt_cap(struct file *filp,
void *priv, struct v4l2_format *fmtd)
{
@@ -1099,10 +1138,10 @@
return -EBUSY;
if (dev->owner && dev->owner != filp)
return -EBUSY;
- dev->owner = filp;
ret = stk_vidioc_try_fmt_cap(filp, priv, fmtd);
if (ret)
return ret;
+ dev->owner = filp;
dev->vsettings.palette = fmtd->fmt.pix.pixelformat;
stk_free_buffers(dev);
@@ -1110,25 +1149,7 @@
dev->vsettings.mode = stk_sizes[fmtd->fmt.pix.priv].m;
stk_initialise(dev);
- /* This registers controls some timings, not sure of what. */
- stk_camera_write_reg(dev, 0x001b, 0x0e);
- if (dev->vsettings.mode == MODE_SXGA)
- stk_camera_write_reg(dev, 0x001c, 0x0e);
- else
- stk_camera_write_reg(dev, 0x001c, 0x46);
- /*
- * Registers 0x0115 0x0114 are the size of each line (bytes),
- * regs 0x0117 0x0116 are the heigth of the image.
- */
- stk_camera_write_reg(dev, 0x0115,
- (fmtd->fmt.pix.bytesperline >> 8) & 0xff);
- stk_camera_write_reg(dev, 0x0114,
- fmtd->fmt.pix.bytesperline & 0xff);
- stk_camera_write_reg(dev, 0x0117,
- (fmtd->fmt.pix.height >> 8) & 0xff);
- stk_camera_write_reg(dev, 0x0116,
- fmtd->fmt.pix.height & 0xff);
- return stk_sensor_configure(dev);
+ return stk_setup_format(dev);
}
static int stk_vidioc_reqbufs(struct file *filp,
@@ -1422,6 +1443,7 @@
}
stk_create_sysfs_files(&dev->vdev);
+ usb_autopm_enable(dev->interface);
return 0;
}
@@ -1439,11 +1461,41 @@
kref_put(&dev->kref, stk_camera_cleanup);
}
+#ifdef CONFIG_PM
+int stk_camera_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct stk_camera *dev = usb_get_intfdata(intf);
+ if (is_streaming(dev)) {
+ stk_stop_stream(dev);
+ /* yes, this is ugly */
+ set_streaming(dev);
+ }
+ return 0;
+}
+
+int stk_camera_resume(struct usb_interface *intf)
+{
+ struct stk_camera *dev = usb_get_intfdata(intf);
+ if (!is_initialised(dev))
+ return 0;
+ unset_initialised(dev);
+ stk_initialise(dev);
+ stk_setup_format(dev);
+ if (is_streaming(dev))
+ stk_start_stream(dev);
+ return 0;
+}
+#endif
+
static struct usb_driver stk_camera_driver = {
.name = "stkwebcam",
.probe = stk_camera_probe,
.disconnect = stk_camera_disconnect,
.id_table = stkwebcam_table,
+#ifdef CONFIG_PM
+ .suspend = stk_camera_suspend,
+ .resume = stk_camera_resume,
+#endif
};
diff --git a/drivers/media/video/stk-webcam.h b/drivers/media/video/stk-webcam.h
index 7e989d1..a2164cb 100644
--- a/drivers/media/video/stk-webcam.h
+++ b/drivers/media/video/stk-webcam.h
@@ -79,6 +79,7 @@
#define unset_present(dev) ((dev)->status &= \
~(S_PRESENT|S_INITIALISED|S_STREAMING))
#define set_initialised(dev) ((dev)->status |= S_INITIALISED)
+#define unset_initialised(dev) ((dev)->status &= ~S_INITIALISED)
#define set_memallocd(dev) ((dev)->status |= S_MEMALLOCD)
#define unset_memallocd(dev) ((dev)->status &= ~S_MEMALLOCD)
#define set_streaming(dev) ((dev)->status |= S_STREAMING)