[PATCH 08/11] adv7180: send V4L2_EVENT_SOURCE_CHANGE on std change

[Steve Longerbeam]

Subscribe to the V4L2_EVENT_SOURCE_CHANGE event and send
V4L2_EVENT_SRC_CH_RESOLUTION in the interrupt handler on a
detected standard change.

Signed-off-by: Steve Longerbeam <steve_longerb...@mentor.com>
---
 drivers/media/i2c/adv7180.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c
index 427695d..f76a0e7 100644
--- a/drivers/media/i2c/adv7180.c
+++ b/drivers/media/i2c/adv7180.c
@@ -28,6 +28,7 @@
 #include <linux/of.h>
 #include <linux/gpio/consumer.h>
 #include <media/v4l2-ioctl.h>
+#include <media/v4l2-event.h>
 #include <linux/videodev2.h>
 #include <media/v4l2-device.h>
 #include <media/v4l2-ctrls.h>
@@ -824,6 +825,20 @@ static int adv7180_g_tvnorms(struct v4l2_subdev *sd, 
v4l2_std_id *norm)
        return 0;
 }
 
+static int adv7180_subscribe_event(struct v4l2_subdev *sd,
+                                  struct v4l2_fh *fh,
+                                  struct v4l2_event_subscription *sub)
+{
+       switch (sub->type) {
+       case V4L2_EVENT_SOURCE_CHANGE:
+               return v4l2_src_change_event_subdev_subscribe(sd, fh, sub);
+       case V4L2_EVENT_CTRL:
+               return v4l2_ctrl_subdev_subscribe_event(sd, fh, sub);
+       default:
+               return -EINVAL;
+       }
+}
+
 static const struct v4l2_subdev_video_ops adv7180_video_ops = {
        .s_std = adv7180_s_std,
        .g_std = adv7180_g_std,
@@ -838,6 +853,8 @@ static const struct v4l2_subdev_video_ops adv7180_video_ops 
= {
 
 static const struct v4l2_subdev_core_ops adv7180_core_ops = {
        .s_power = adv7180_s_power,
+       .subscribe_event = adv7180_subscribe_event,
+       .unsubscribe_event = v4l2_event_subdev_unsubscribe,
 };
 
 static const struct v4l2_subdev_pad_ops adv7180_pad_ops = {
@@ -862,8 +879,18 @@ static irqreturn_t adv7180_irq(int irq, void *devid)
        /* clear */
        adv7180_write(state, ADV7180_REG_ICR3, isr3);
 
-       if (isr3 & ADV7180_IRQ3_AD_CHANGE && state->autodetect)
-               __adv7180_status(state, NULL, &state->curr_norm);
+       if (isr3 & ADV7180_IRQ3_AD_CHANGE) {
+               static const struct v4l2_event src_ch = {
+                       .type = V4L2_EVENT_SOURCE_CHANGE,
+                       .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
+               };
+
+               v4l2_subdev_notify_event(&state->sd, &src_ch);
+
+               if (state->autodetect)
+                       __adv7180_status(state, NULL, &state->curr_norm);
+       }
+
        mutex_unlock(&state->mutex);
 
        return IRQ_HANDLED;
@@ -1403,7 +1430,7 @@ static int adv7180_probe(struct i2c_client *client,
        state->input = 0;
        sd = &state->sd;
        v4l2_i2c_subdev_init(sd, client, &adv7180_ops);
-       sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE;
+       sd->flags = V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
 
        ret = adv7180_init_controls(state);
        if (ret)
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html