[media] cx24120: Move clock set to read_status

This patch removes the requirement of waiting for tune in
set_frontend by moving the clock set call into read_status

Signed-off-by: Jemma Denson <jdenson@gmail.com>
Signed-off-by: Patrick Boettcher <patrick.boettcher@posteo.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/dvb-frontends/cx24120.c b/drivers/media/dvb-frontends/cx24120.c
index 441a963..5546015 100644 (file)
--- a/drivers/media/dvb-frontends/cx24120.c
+++ b/drivers/media/dvb-frontends/cx24120.c
@@ -138,6 +138,7 @@ struct cx24120_state {
 
        u8 cold_init;
        u8 mpeg_enabled;
+       u8 need_clock_set;
 
        /* current and next tuning parameters */
        struct cx24120_tuning dcur;
@@ -613,6 +614,8 @@ static int cx24120_send_diseqc_msg(struct dvb_frontend *fe,
        return -ETIMEDOUT;
 }
 
+static void cx24120_set_clock_ratios(struct dvb_frontend *fe);
+
 /* Read current tuning status */
 static int cx24120_read_status(struct dvb_frontend *fe, fe_status_t *status)
 {
@@ -639,6 +642,20 @@ static int cx24120_read_status(struct dvb_frontend *fe, fe_status_t *status)
         * Other cx241xx drivers have this slightly
         * different */
 
+       /* Set the clock once tuned in */
+       if (state->need_clock_set && *status & FE_HAS_LOCK) {
+               /* Set clock ratios */
+               cx24120_set_clock_ratios(fe);
+
+               /* Old driver would do a msleep(200) here */
+
+               /* Renable mpeg output */
+               if (!state->mpeg_enabled)
+                       cx24120_msg_mpeg_output_global_config(state, 1);
+
+               state->need_clock_set = 0;
+       }
+
        return 0;
 }
 
@@ -988,32 +1005,12 @@ static void cx24120_clone_params(struct dvb_frontend *fe)
        state->dcur = state->dnxt;
 }
 
-/* Table of time to tune for different symrates */
-static struct cx24120_symrate_delay {
-       fe_delivery_system_t delsys;
-       u32 symrate;            /* Check for >= this symrate */
-       u32 delay;              /* Timeout in ms */
-} symrates_delay_table[] = {
-       { SYS_DVBS,  10000000,   400 },
-       { SYS_DVBS,   8000000,  2000 },
-       { SYS_DVBS,   6000000,  5000 },
-       { SYS_DVBS,   3000000, 10000 },
-       { SYS_DVBS,         0, 15000 },
-       { SYS_DVBS2, 10000000,   600 }, /* DVBS2 needs a little longer */
-       { SYS_DVBS2,  8000000,  2000 }, /* (so these might need bumping too) */
-       { SYS_DVBS2,  6000000,  5000 },
-       { SYS_DVBS2,  3000000, 10000 },
-       { SYS_DVBS2,        0, 15000 },
-};
-
 static int cx24120_set_frontend(struct dvb_frontend *fe)
 {
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        struct cx24120_state *state = fe->demodulator_priv;
        struct cx24120_cmd cmd;
        int ret;
-       int delay_cnt, sd_idx = 0;
-       fe_status_t status;
 
        switch (c->delivery_system) {
        case SYS_DVBS2:
@@ -1076,6 +1073,9 @@ static int cx24120_set_frontend(struct dvb_frontend *fe)
                "%s: Inversion   = %d (val = 0x%02x)\n", __func__,
                state->dcur.inversion, state->dcur.inversion_val);
 
+       /* Flag that clock needs to be set after tune */
+       state->need_clock_set = 1;
+
        /* Tune in */
        cmd.id = CMD_TUNEREQUEST;
        cmd.len = 15;
@@ -1107,49 +1107,6 @@ static int cx24120_set_frontend(struct dvb_frontend *fe)
        ret |= state->dcur.ratediv;
        ret = cx24120_writereg(state, CX24120_REG_RATEDIV, ret);
 
-       /* Default time to tune */
-       delay_cnt = 500;
-
-       /* Establish time to tune from symrates_delay_table */
-       for (sd_idx = 0; sd_idx < ARRAY_SIZE(symrates_delay_table); sd_idx++) {
-               if (state->dcur.delsys != symrates_delay_table[sd_idx].delsys)
-                       continue;
-               if (c->symbol_rate < symrates_delay_table[sd_idx].symrate)
-                       continue;
-
-               /* found */
-               delay_cnt = symrates_delay_table[sd_idx].delay;
-               dev_dbg(&state->i2c->dev, "%s: Found symrate delay = %d\n",
-                       __func__, delay_cnt);
-               break;
-       }
-
-       /* Wait for tuning */
-       while (delay_cnt >= 0) {
-               cx24120_read_status(fe, &status);
-               if (status & FE_HAS_LOCK)
-                       goto tuned;
-               msleep(20);
-               delay_cnt -= 20;
-       }
-
-       /* Fail to tune */
-       dev_dbg(&state->i2c->dev, "%s: Tuning failed\n", __func__);
-
-       return -EINVAL;
-
-tuned:
-       dev_dbg(&state->i2c->dev, "%s: Tuning successful\n", __func__);
-
-       /* Set clock ratios */
-       cx24120_set_clock_ratios(fe);
-
-       /* Old driver would do a msleep(200) here */
-
-       /* Renable mpeg output */
-       if (!state->mpeg_enabled)
-               cx24120_msg_mpeg_output_global_config(state, 1);
-
        return 0;
 }
 
@@ -1419,11 +1376,13 @@ static int cx24120_get_frontend(struct dvb_frontend *fe)
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
        struct cx24120_state *state = fe->demodulator_priv;
        u8 freq1, freq2, freq3;
+       fe_status_t status;
 
        dev_dbg(&state->i2c->dev, "%s()", __func__);
 
        /* don't return empty data if we're not tuned in */
-       if (state->mpeg_enabled)
+       cx24120_read_status(fe, &status);
+       if ((status & FE_HAS_LOCK) == 0)
                return 0;
 
        /* Get frequency */