V4L/DVB (13238): v4l2_subdev: rename tuner s_standby operation to core s_power

Upcoming I2C v4l2_subdev drivers need a way to control the subdevice
power state from the core. This use case is already partially covered by
the tuner s_standby operation, but no way to explicitly come back from
the standby state is available.

Rename the tuner s_standby operation to core s_power, and fix tuner
drivers accordingly. The tuner core will call s_power(0) instead of
s_standby(). No explicit call to s_power(1) is required for tuners as
they are supposed to wake up from standby automatically.

[mchehab@redhat.com: CodingStyle fix]
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

13 files changed, 21 insertions, 17 deletions

diff --git a/drivers/media/video/au0828/au0828-video.c b/drivers/media/video/au0828/au0828-video.c
index 51527d7b55a7..1485aee18d58 100644
--- a/drivers/media/video/au0828/au0828-video.c
+++ b/drivers/media/video/au0828/au0828-video.c
@@ -830,7 +830,7 @@ static int au0828_v4l2_close(struct file *filp)
                 au0828_uninit_isoc(dev);
 
                 /* Save some power by putting tuner to sleep */
-                v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
+                v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
 
                 /* When close the device, set the usb intf0 into alt0 to free
                    USB bandwidth */
diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c
index 36503725d973..d095aa0d6d19 100644
--- a/drivers/media/video/cx231xx/cx231xx-video.c
+++ b/drivers/media/video/cx231xx/cx231xx-video.c
@@ -2106,7 +2106,7 @@ static int cx231xx_v4l2_close(struct file *filp)
                 }
 
                 /* Save some power by putting tuner to sleep */
-                call_all(dev, tuner, s_standby);
+                call_all(dev, core, s_power, 0);
 
                 /* do this before setting alternate! */
                 cx231xx_uninit_isoc(dev);
diff --git a/drivers/media/video/cx23885/cx23885-core.c b/drivers/media/video/cx23885/cx23885-core.c
index d6e41db500ef..e34a4ec4a2cd 100644
--- a/drivers/media/video/cx23885/cx23885-core.c
+++ b/drivers/media/video/cx23885/cx23885-core.c
@@ -919,7 +919,7 @@ static int cx23885_dev_setup(struct cx23885_dev *dev)
         cx23885_i2c_register(&dev->i2c_bus[1]);
         cx23885_i2c_register(&dev->i2c_bus[2]);
         cx23885_card_setup(dev);
-        call_all(dev, tuner, s_standby);
+        call_all(dev, core, s_power, 0);
         cx23885_ir_init(dev);
 
         if (cx23885_boards[dev->board].porta == CX23885_ANALOG_VIDEO) {
diff --git a/drivers/media/video/cx23885/cx23885-dvb.c b/drivers/media/video/cx23885/cx23885-dvb.c
index 4d439f2c4abc..f4f046cd81a5 100644
--- a/drivers/media/video/cx23885/cx23885-dvb.c
+++ b/drivers/media/video/cx23885/cx23885-dvb.c
@@ -920,7 +920,7 @@ static int dvb_register(struct cx23885_tsport *port)
         fe0->dvb.frontend->callback = cx23885_tuner_callback;
 
         /* Put the analog decoder in standby to keep it quiet */
-        call_all(dev, tuner, s_standby);
+        call_all(dev, core, s_power, 0);
 
         if (fe0->dvb.frontend->ops.analog_ops.standby)
                 fe0->dvb.frontend->ops.analog_ops.standby(fe0->dvb.frontend);
diff --git a/drivers/media/video/cx88/cx88-cards.c b/drivers/media/video/cx88/cx88-cards.c
index 33be6369871a..7330a2d70439 100644
--- a/drivers/media/video/cx88/cx88-cards.c
+++ b/drivers/media/video/cx88/cx88-cards.c
@@ -3267,7 +3267,7 @@ static void cx88_card_setup(struct cx88_core *core)
                             ctl.fname);
                 call_all(core, tuner, s_config, &xc2028_cfg);
         }
-        call_all(core, tuner, s_standby);
+        call_all(core, core, s_power, 0);
 }
 
 /* ------------------------------------------------------------------ */
diff --git a/drivers/media/video/cx88/cx88-dvb.c b/drivers/media/video/cx88/cx88-dvb.c
index d9e402b25b56..9df71d0244a8 100644
--- a/drivers/media/video/cx88/cx88-dvb.c
+++ b/drivers/media/video/cx88/cx88-dvb.c
@@ -1170,7 +1170,7 @@ static int dvb_register(struct cx8802_dev *dev)
                 fe1->dvb.frontend->ops.ts_bus_ctrl = cx88_dvb_bus_ctrl;
 
         /* Put the analog decoder in standby to keep it quiet */
-        call_all(core, tuner, s_standby);
+        call_all(core, core, s_power, 0);
 
         /* register everything */
         return videobuf_dvb_register_bus(&dev->frontends, THIS_MODULE, dev,
diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 57e6b1241090..d7e8fcee559c 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -935,7 +935,7 @@ static int video_release(struct file *file)
 
         mutex_lock(&dev->core->lock);
         if(atomic_dec_and_test(&dev->core->users))
-                call_all(dev->core, tuner, s_standby);
+                call_all(dev->core, core, s_power, 0);
         mutex_unlock(&dev->core->lock);
 
         return 0;
diff --git a/drivers/media/video/em28xx/em28xx-cards.c b/drivers/media/video/em28xx/em28xx-cards.c
index 6c7cbbc59e1c..1e1937070738 100644
--- a/drivers/media/video/em28xx/em28xx-cards.c
+++ b/drivers/media/video/em28xx/em28xx-cards.c
@@ -2658,7 +2658,7 @@ static int em28xx_init_dev(struct em28xx **devhandle, struct usb_device *udev,
         em28xx_init_extension(dev);
 
         /* Save some power by putting tuner to sleep */
-        v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
+        v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
 
         return 0;
 
diff --git a/drivers/media/video/em28xx/em28xx-video.c b/drivers/media/video/em28xx/em28xx-video.c
index 3a1dfb7726f8..fbe536f092f9 100644
--- a/drivers/media/video/em28xx/em28xx-video.c
+++ b/drivers/media/video/em28xx/em28xx-video.c
@@ -2225,7 +2225,7 @@ static int em28xx_v4l2_close(struct file *filp)
                 }
 
                 /* Save some power by putting tuner to sleep */
-                v4l2_device_call_all(&dev->v4l2_dev, 0, tuner, s_standby);
+                v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_power, 0);
 
                 /* do this before setting alternate! */
                 em28xx_uninit_isoc(dev);
diff --git a/drivers/media/video/saa7134/saa7134-core.c b/drivers/media/video/saa7134/saa7134-core.c
index f87757fccc72..9a5df930885b 100644
--- a/drivers/media/video/saa7134/saa7134-core.c
+++ b/drivers/media/video/saa7134/saa7134-core.c
@@ -1032,7 +1032,7 @@ static int __devinit saa7134_initdev(struct pci_dev *pci_dev,
         saa7134_irq_video_signalchange(dev);
 
         if (TUNER_ABSENT != dev->tuner_type)
-                saa_call_all(dev, tuner, s_standby);
+                saa_call_all(dev, core, s_power, 0);
 
         /* register v4l devices */
         if (saa7134_no_overlay > 0)
diff --git a/drivers/media/video/saa7134/saa7134-video.c b/drivers/media/video/saa7134/saa7134-video.c
index da26f476a302..35f8daa3a359 100644
--- a/drivers/media/video/saa7134/saa7134-video.c
+++ b/drivers/media/video/saa7134/saa7134-video.c
@@ -1499,7 +1499,7 @@ static int video_release(struct file *file)
         saa_andorb(SAA7134_OFMT_DATA_A, 0x1f, 0);
         saa_andorb(SAA7134_OFMT_DATA_B, 0x1f, 0);
 
-        saa_call_all(dev, tuner, s_standby);
+        saa_call_all(dev, core, s_power, 0);
         if (fh->radio)
                 saa_call_all(dev, core, ioctl, RDS_CMD_CLOSE, &cmd);
 
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index aba92e2313d8..50f6db5cd50b 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -752,14 +752,17 @@ static int tuner_s_radio(struct v4l2_subdev *sd)
         return 0;
 }
 
-static int tuner_s_standby(struct v4l2_subdev *sd)
+static int tuner_s_power(struct v4l2_subdev *sd, int on)
 {
         struct tuner *t = to_tuner(sd);
         struct analog_demod_ops *analog_ops = &t->fe.ops.analog_ops;
 
+        if (on)
+                return 0;
+
         tuner_dbg("Putting tuner to sleep\n");
 
-        if (check_mode(t, "s_standby") == -EINVAL)
+        if (check_mode(t, "s_power") == -EINVAL)
                 return 0;
         t->mode = T_STANDBY;
         if (analog_ops->standby)
@@ -961,6 +964,7 @@ static int tuner_command(struct i2c_client *client, unsigned cmd, void *arg)
 static const struct v4l2_subdev_core_ops tuner_core_ops = {
         .log_status = tuner_log_status,
         .s_std = tuner_s_std,
+        .s_power = tuner_s_power,
 };
 
 static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
@@ -971,7 +975,6 @@ static const struct v4l2_subdev_tuner_ops tuner_tuner_ops = {
         .g_frequency = tuner_g_frequency,
         .s_type_addr = tuner_s_type_addr,
         .s_config = tuner_s_config,
-        .s_standby = tuner_s_standby,
 };
 
 static const struct v4l2_subdev_ops tuner_ops = {
diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
index ecc2818938b3..88c13d6f7912 100644
--- a/include/media/v4l2-subdev.h
+++ b/include/media/v4l2-subdev.h
@@ -106,6 +106,9 @@ struct v4l2_decode_vbi_line {
 
    s_gpio: set GPIO pins. Very simple right now, might need to be extended with
         a direction argument if needed.
+
+   s_power: puts subdevice in power saving mode (on == 0) or normal operation
+        mode (on == 1).
  */
 struct v4l2_subdev_core_ops {
         int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
@@ -128,6 +131,7 @@ struct v4l2_subdev_core_ops {
         int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
         int (*s_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
 #endif
+        int (*s_power)(struct v4l2_subdev *sd, int on);
 };
 
 /* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio.
@@ -137,8 +141,6 @@ struct v4l2_subdev_core_ops {
    s_type_addr: sets tuner type and its I2C addr.
 
    s_config: sets tda9887 specific stuff, like port1, port2 and qss
-
-   s_standby: puts tuner on powersaving state, disabling it, except for i2c.
  */
 struct v4l2_subdev_tuner_ops {
         int (*s_mode)(struct v4l2_subdev *sd, enum v4l2_tuner_type);
@@ -151,7 +153,6 @@ struct v4l2_subdev_tuner_ops {
         int (*s_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
         int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type);
         int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
-        int (*s_standby)(struct v4l2_subdev *sd);
 };
 
 /* s_clock_freq: set the frequency (in Hz) of the audio clock output.