Merge branch 'drm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...

[linux-2.6-omap-h63xx.git] / drivers / media / dvb / frontends / s5h1411.c

diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c
index e328d88bcbd4eb27449d596aaa2162c205e9ae24..40644aacffcb218dbbee77ee8a8b80e15b2b0164 100644 (file)
--- a/drivers/media/dvb/frontends/s5h1411.c
+++ b/drivers/media/dvb/frontends/s5h1411.c
@@ -38,6 +38,7 @@ struct s5h1411_state {
        struct dvb_frontend frontend;
 
        fe_modulation_t current_modulation;
+       unsigned int first_tune:1;
 
        u32 current_frequency;
        int if_freq;
@@ -489,6 +490,12 @@ static int s5h1411_enable_modulation(struct dvb_frontend *fe,
 
        dprintk("%s(0x%08x)\n", __func__, m);
 
+       if ((state->first_tune == 0) && (m == state->current_modulation)) {
+               dprintk("%s() Already at desired modulation.  Skipping...\n",
+                       __func__);
+               return 0;
+       }
+
        switch (m) {
        case VSB_8:
                dprintk("%s() VSB_8\n", __func__);
@@ -513,6 +520,7 @@ static int s5h1411_enable_modulation(struct dvb_frontend *fe,
        }
 
        state->current_modulation = m;
+       state->first_tune = 0;
        s5h1411_softreset(fe);
 
        return 0;
@@ -546,7 +554,7 @@ static int s5h1411_set_gpio(struct dvb_frontend *fe, int enable)
                return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xe0, val);
 }
 
-static int s5h1411_sleep(struct dvb_frontend *fe, int enable)
+static int s5h1411_set_powerstate(struct dvb_frontend *fe, int enable)
 {
        struct s5h1411_state *state = fe->demodulator_priv;
 
@@ -562,6 +570,11 @@ static int s5h1411_sleep(struct dvb_frontend *fe, int enable)
        return 0;
 }
 
+static int s5h1411_sleep(struct dvb_frontend *fe)
+{
+       return s5h1411_set_powerstate(fe, 1);
+}
+
 static int s5h1411_register_reset(struct dvb_frontend *fe)
 {
        struct s5h1411_state *state = fe->demodulator_priv;
@@ -585,9 +598,6 @@ static int s5h1411_set_frontend(struct dvb_frontend *fe,
 
        s5h1411_enable_modulation(fe, p->u.vsb.modulation);
 
-       /* Allow the demod to settle */
-       msleep(100);
-
        if (fe->ops.tuner_ops.set_params) {
                if (fe->ops.i2c_gate_ctrl)
                        fe->ops.i2c_gate_ctrl(fe, 1);
@@ -598,6 +608,10 @@ static int s5h1411_set_frontend(struct dvb_frontend *fe,
                        fe->ops.i2c_gate_ctrl(fe, 0);
        }
 
+       /* Issue a reset to the demod so it knows to resync against the
+          newly tuned frequency */
+       s5h1411_softreset(fe);
+
        return 0;
 }
 
@@ -610,7 +624,7 @@ static int s5h1411_init(struct dvb_frontend *fe)
 
        dprintk("%s()\n", __func__);
 
-       s5h1411_sleep(fe, 0);
+       s5h1411_set_powerstate(fe, 0);
        s5h1411_register_reset(fe);
 
        for (i = 0; i < ARRAY_SIZE(init_tab); i++)
@@ -621,6 +635,11 @@ static int s5h1411_init(struct dvb_frontend *fe)
        /* The datasheet says that after initialisation, VSB is default */
        state->current_modulation = VSB_8;
 
+       /* Although the datasheet says it's in VSB, empirical evidence
+          shows problems getting lock on the first tuning request.  Make
+          sure we call enable_modulation the first time around */
+       state->first_tune = 1;
+
        if (state->config->output_mode == S5H1411_SERIAL_OUTPUT)
                /* Serial */
                s5h1411_set_serialmode(fe, 1);
@@ -875,6 +894,7 @@ static struct dvb_frontend_ops s5h1411_ops = {
        },
 
        .init                 = s5h1411_init,
+       .sleep                = s5h1411_sleep,
        .i2c_gate_ctrl        = s5h1411_i2c_gate_ctrl,
        .set_frontend         = s5h1411_set_frontend,
        .get_frontend         = s5h1411_get_frontend,