media: i2c: ov9282: Action CID_VBLANK when set.

Programming the sensor with TIMING_VTS (aka LPFR) was done
when triggered by a change in exposure or gain, but not
when V4L2_CID_VBLANK was changed. Dynamic frame rate
changes could therefore not be achieved.

Separate out programming TIMING_VTS so that it is triggered
by set_ctrl(V4L2_CID_VBLANK)

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

diff --git a/drivers/media/i2c/ov9282.c b/drivers/media/i2c/ov9282.c
index 889db9d..e964461 100644 (file)
--- a/drivers/media/i2c/ov9282.c
+++ b/drivers/media/i2c/ov9282.c
@@ -417,22 +417,15 @@ static int ov9282_update_controls(struct ov9282 *ov9282,
  */
 static int ov9282_update_exp_gain(struct ov9282 *ov9282, u32 exposure, u32 gain)
 {
-       u32 lpfr;
        int ret;
 
-       lpfr = ov9282->vblank + ov9282->cur_mode->height;
-
-       dev_dbg(ov9282->dev, "Set exp %u, analog gain %u, lpfr %u",
-               exposure, gain, lpfr);
+       dev_dbg(ov9282->dev, "Set exp %u, analog gain %u",
+               exposure, gain);
 
        ret = ov9282_write_reg(ov9282, OV9282_REG_HOLD, 1, 1);
        if (ret)
                return ret;
 
-       ret = ov9282_write_reg(ov9282, OV9282_REG_LPFR, 2, lpfr);
-       if (ret)
-               goto error_release_group_hold;
-
        ret = ov9282_write_reg(ov9282, OV9282_REG_EXPOSURE, 3, exposure << 4);
        if (ret)
                goto error_release_group_hold;
@@ -463,6 +456,7 @@ static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl)
                container_of(ctrl->handler, struct ov9282, ctrl_handler);
        u32 analog_gain;
        u32 exposure;
+       u32 lpfr;
        int ret;
 
        switch (ctrl->id) {
@@ -480,11 +474,14 @@ static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl)
                                               OV9282_EXPOSURE_OFFSET,
                                               1, OV9282_EXPOSURE_DEFAULT);
                break;
-       case V4L2_CID_EXPOSURE:
-               /* Set controls only if sensor is in power on state */
-               if (!pm_runtime_get_if_in_use(ov9282->dev))
-                       return 0;
+       }
+
+       /* Set controls only if sensor is in power on state */
+       if (!pm_runtime_get_if_in_use(ov9282->dev))
+               return 0;
 
+       switch (ctrl->id) {
+       case V4L2_CID_EXPOSURE:
                exposure = ctrl->val;
                analog_gain = ov9282->again_ctrl->val;
 
@@ -492,15 +489,18 @@ static int ov9282_set_ctrl(struct v4l2_ctrl *ctrl)
                        exposure, analog_gain);
 
                ret = ov9282_update_exp_gain(ov9282, exposure, analog_gain);
-
-               pm_runtime_put(ov9282->dev);
-
+               break;
+       case V4L2_CID_VBLANK:
+               lpfr = ov9282->vblank + ov9282->cur_mode->height;
+               ret = ov9282_write_reg(ov9282, OV9282_REG_LPFR, 2, lpfr);
                break;
        default:
                dev_err(ov9282->dev, "Invalid control %d", ctrl->id);
                ret = -EINVAL;
        }
 
+       pm_runtime_put(ov9282->dev);
+
        return ret;
 }