[media] DVB: dvb_frontend: add parameters_out

- Holds the parameters detected by the demod.
- Updated on every call to get_frontend, either through ioctl or when
  a frontend event occurs.
- Reset to input parameters after every call to set_frontend, tune or
  search/track.

Signed-off-by: Andreas Oberritter <obi@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/drivers/media/dvb/dvb-core/dvb_frontend.c b/drivers/media/dvb/dvb-core/dvb_frontend.c
index 4a05a2c..3666529 100644 (file)
--- a/drivers/media/dvb/dvb-core/dvb_frontend.c
+++ b/drivers/media/dvb/dvb-core/dvb_frontend.c
@@ -106,6 +106,7 @@ struct dvb_frontend_private {
        /* thread/frontend values */
        struct dvb_device *dvbdev;
        struct dvb_frontend_parameters parameters_in;
+       struct dvb_frontend_parameters parameters_out;
        struct dvb_fe_events events;
        struct semaphore sem;
        struct list_head list_head;
@@ -160,12 +161,11 @@ static void dvb_frontend_add_event(struct dvb_frontend *fe, fe_status_t status)
 
        e = &events->events[events->eventw];
 
-       memcpy (&e->parameters, &fepriv->parameters_in,
-               sizeof (struct dvb_frontend_parameters));
-
        if (status & FE_HAS_LOCK)
                if (fe->ops.get_frontend)
-                       fe->ops.get_frontend(fe, &e->parameters);
+                       fe->ops.get_frontend(fe, &fepriv->parameters_out);
+
+       e->parameters = fepriv->parameters_out;
 
        events->eventw = wp;
 
@@ -353,6 +353,7 @@ static int dvb_frontend_swzigzag_autotune(struct dvb_frontend *fe, int check_wra
                fepriv->parameters_in.inversion = fepriv->inversion;
        if (fe->ops.set_frontend)
                fe_set_err = fe->ops.set_frontend(fe, &fepriv->parameters_in);
+       fepriv->parameters_out = fepriv->parameters_in;
        if (fe_set_err < 0) {
                fepriv->state = FESTATE_ERROR;
                return fe_set_err;
@@ -384,6 +385,7 @@ static void dvb_frontend_swzigzag(struct dvb_frontend *fe)
                        if (fe->ops.set_frontend)
                                retval = fe->ops.set_frontend(fe,
                                                        &fepriv->parameters_in);
+                       fepriv->parameters_out = fepriv->parameters_in;
                        if (retval < 0)
                                fepriv->state = FESTATE_ERROR;
                        else
@@ -600,6 +602,8 @@ restart:
 
                                if (fe->ops.tune)
                                        fe->ops.tune(fe, params, fepriv->tune_mode_flags, &fepriv->delay, &s);
+                               if (params)
+                                       fepriv->parameters_out = *params;
 
                                if (s != fepriv->status && !(fepriv->tune_mode_flags & FE_TUNE_MODE_ONESHOT)) {
                                        dprintk("%s: state changed, adding current state\n", __func__);
@@ -639,6 +643,7 @@ restart:
                                        fepriv->algo_status |= DVBFE_ALGO_SEARCH_AGAIN;
                                        fepriv->delay = HZ / 2;
                                }
+                               fepriv->parameters_out = fepriv->parameters_in;
                                fe->ops.read_status(fe, &s);
                                if (s != fepriv->status) {
                                        dvb_frontend_add_event(fe, s); /* update event list */
@@ -1880,8 +1885,8 @@ static int dvb_frontend_ioctl_legacy(struct file *file,
 
        case FE_GET_FRONTEND:
                if (fe->ops.get_frontend) {
-                       memcpy (parg, &fepriv->parameters_in, sizeof (struct dvb_frontend_parameters));
-                       err = fe->ops.get_frontend(fe, (struct dvb_frontend_parameters*) parg);
+                       err = fe->ops.get_frontend(fe, &fepriv->parameters_out);
+                       memcpy(parg, &fepriv->parameters_out, sizeof(struct dvb_frontend_parameters));
                }
                break;