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[media] dib8000: use jifies instead of current_kernel_time()
Instead of doing the tuning delays and timeouts using current_kernel_time(), use jiffies. That consumes less CPU cycles, and it is monotonic. Acked-By: Patrick Boettcher <pboettcher@kernellabs.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
0de04ca1dc
commit
d6c62b7638
@ -115,7 +115,7 @@ struct dib8000_state {
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u16 found_guard;
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u8 subchannel;
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u8 symbol_duration;
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u32 timeout;
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unsigned long timeout;
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u8 longest_intlv_layer;
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u16 output_mode;
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@ -1237,7 +1237,7 @@ static int dib8000_agc_soft_split(struct dib8000_state *state)
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u16 agc, split_offset;
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if (!state->current_agc || !state->current_agc->perform_agc_softsplit || state->current_agc->split.max == 0)
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return FE_CALLBACK_TIME_NEVER;
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return 0;
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// n_agc_global
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agc = dib8000_read_word(state, 390);
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@ -2849,12 +2849,12 @@ static void dib8000_set_sync_wait(struct dib8000_state *state)
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dib8000_write_word(state, 273, (dib8000_read_word(state, 273) & 0x000f) | (sync_wait << 4));
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}
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static u32 dib8000_get_timeout(struct dib8000_state *state, u32 delay, enum timeout_mode mode)
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static unsigned long dib8000_get_timeout(struct dib8000_state *state, u32 delay, enum timeout_mode mode)
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{
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if (mode == SYMBOL_DEPENDENT_ON)
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return systime() + (delay * state->symbol_duration);
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else
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return systime() + delay;
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delay *= state->symbol_duration;
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return jiffies + usecs_to_jiffies(delay * 100);
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}
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static s32 dib8000_get_status(struct dvb_frontend *fe)
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@ -3006,8 +3006,8 @@ static int dib8000_tune(struct dvb_frontend *fe)
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u16 locks, deeper_interleaver = 0, i;
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int ret = 1; /* 1 symbol duration (in 100us unit) delay most of the time */
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u32 *timeout = &state->timeout;
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u32 now = systime();
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unsigned long *timeout = &state->timeout;
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unsigned long now = jiffies;
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#ifdef DIB8000_AGC_FREEZE
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u16 agc1, agc2;
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#endif
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@ -3017,7 +3017,8 @@ static int dib8000_tune(struct dvb_frontend *fe)
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#if 0
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if (*tune_state < CT_DEMOD_STOP)
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dprintk("IN: context status = %d, TUNE_STATE %d autosearch step = %u systime = %u", state->channel_parameters_set, *tune_state, state->autosearch_state, now);
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dprintk("IN: context status = %d, TUNE_STATE %d autosearch step = %u jiffies = %lu",
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state->channel_parameters_set, *tune_state, state->autosearch_state, now);
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#endif
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switch (*tune_state) {
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@ -3186,7 +3187,7 @@ static int dib8000_tune(struct dvb_frontend *fe)
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} else {
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*tune_state = CT_DEMOD_STEP_8;
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}
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} else if (now > *timeout) {
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} else if (time_after(now, *timeout)) {
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*tune_state = CT_DEMOD_STEP_6; /* goto check for diversity input connection */
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}
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break;
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@ -3215,7 +3216,7 @@ static int dib8000_tune(struct dvb_frontend *fe)
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if (locks & (1<<10)) { /* lmod4_lock */
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ret = 14; /* wait for 14 symbols */
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*tune_state = CT_DEMOD_STEP_8;
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} else if (now > *timeout)
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} else if (time_after(now, *timeout))
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*tune_state = CT_DEMOD_STEP_6; /* goto check for diversity input connection */
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break;
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@ -3258,8 +3259,9 @@ static int dib8000_tune(struct dvb_frontend *fe)
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if (state->diversity_onoff != 0) /* because of diversity sync */
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locks *= 2;
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*timeout = now + (2000 * locks); /* give the mpeg lock 800ms if sram is present */
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dprintk("Deeper interleaver mode = %d on layer %d : timeout mult factor = %d => will use timeout = %d", deeper_interleaver, state->longest_intlv_layer, locks, *timeout);
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*timeout = now + msecs_to_jiffies(200 * locks); /* give the mpeg lock 800ms if sram is present */
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dprintk("Deeper interleaver mode = %d on layer %d : timeout mult factor = %d => will use timeout = %ld",
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deeper_interleaver, state->longest_intlv_layer, locks, *timeout);
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*tune_state = CT_DEMOD_STEP_10;
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} else
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@ -3278,7 +3280,7 @@ static int dib8000_tune(struct dvb_frontend *fe)
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else
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state->status = FE_STATUS_DATA_LOCKED;
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*tune_state = CT_DEMOD_STOP;
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} else if (now > *timeout) {
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} else if (time_after(now, *timeout)) {
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if (c->isdbt_sb_mode
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&& c->isdbt_sb_subchannel < 14
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&& !state->differential_constellation) { /* continue to try init prbs autosearch */
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@ -3324,7 +3326,7 @@ static int dib8000_tune(struct dvb_frontend *fe)
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state->agc2_min = 0;
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}
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#endif
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ret = FE_CALLBACK_TIME_NEVER;
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ret = 0;
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break;
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default:
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break;
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@ -3547,9 +3549,9 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
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{
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struct dib8000_state *state = fe->demodulator_priv;
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struct dtv_frontend_properties *c = &state->fe[0]->dtv_property_cache;
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int l, i, active, time, time_slave = FE_CALLBACK_TIME_NEVER;
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int l, i, active, time, time_slave = 0;
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u8 exit_condition, index_frontend;
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u32 delay, callback_time;
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unsigned long delay, callback_time;
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if (c->frequency == 0) {
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dprintk("dib8000: must at least specify frequency ");
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@ -3601,12 +3603,12 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
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time = dib8000_agc_startup(state->fe[0]);
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for (index_frontend = 1; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
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time_slave = dib8000_agc_startup(state->fe[index_frontend]);
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if (time == FE_CALLBACK_TIME_NEVER)
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if (time == 0)
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time = time_slave;
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else if ((time_slave != FE_CALLBACK_TIME_NEVER) && (time_slave > time))
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else if ((time_slave != 0) && (time_slave > time))
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time = time_slave;
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}
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if (time == FE_CALLBACK_TIME_NEVER)
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if (time == 0)
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break;
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/*
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@ -3633,11 +3635,14 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
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active = 1;
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do {
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callback_time = FE_CALLBACK_TIME_NEVER;
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callback_time = 0;
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for (index_frontend = 0; (index_frontend < MAX_NUMBER_OF_FRONTENDS) && (state->fe[index_frontend] != NULL); index_frontend++) {
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delay = dib8000_tune(state->fe[index_frontend]);
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if (delay != FE_CALLBACK_TIME_NEVER)
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delay += systime();
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if (delay != 0) {
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delay = jiffies + usecs_to_jiffies(100 * delay);
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if (!callback_time || delay < callback_time)
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callback_time = delay;
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}
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/* we are in autosearch */
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if (state->channel_parameters_set == 0) { /* searching */
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@ -3666,8 +3671,6 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
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}
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}
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}
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if (delay < callback_time)
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callback_time = delay;
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}
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/* tuning is done when the master frontend is done (failed or success) */
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if (dib8000_get_status(state->fe[0]) == FE_STATUS_TUNE_FAILED ||
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@ -3683,12 +3686,12 @@ static int dib8000_set_frontend(struct dvb_frontend *fe)
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dprintk("tuning done with status %d", dib8000_get_status(state->fe[0]));
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}
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if ((active == 1) && (callback_time == FE_CALLBACK_TIME_NEVER)) {
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if ((active == 1) && (callback_time == 0)) {
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dprintk("strange callback time something went wrong");
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active = 0;
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}
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while ((active == 1) && (systime() < callback_time))
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while ((active == 1) && (time_before(jiffies, callback_time)))
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msleep(100);
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} while (active);
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