dtv_demod: txlx atsc-t loses lock when play video for a long time [1/1]

PD#SWPL-3418

Problem:
[Einstein]when AC off/on,enter live TV ,
TV display blank screen and no signal about 5S

Solution:
use post-eq to track(0x912=0x50)

Verify:
verified by t962x_r311

Change-Id: I924c55a8f1c92328e4371cb730e1b03bd720457f
Signed-off-by: Zhiwei Yuan <zhiwei.yuan@amlogic.com>

diff --git a/drivers/amlogic/media/dtv_demod/amlfrontend.c b/drivers/amlogic/media/dtv_demod/amlfrontend.c
index 86fbf09..780c4fd 100644 (file)
--- a/drivers/amlogic/media/dtv_demod/amlfrontend.c
+++ b/drivers/amlogic/media/dtv_demod/amlfrontend.c
@@ -1952,6 +1952,9 @@ void atsc_polling(struct dvb_frontend *fe, enum fe_status *status)
 {
        struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 
+       if (!demod_thread)
+               return;
+
        if (c->modulation == QPSK) {
                PR_DBG("mode is qpsk, return;\n");
                /*return;*/
@@ -2515,6 +2518,9 @@ static int gxtv_demod_dvbc_tune(struct dvb_frontend *fe, bool re_tune,
 
        *delay = HZ / 4;
 
+       if (!demod_thread)
+               return 0;
+
        if (re_tune) {
                /*first*/
                dtvdd_devp->en_detect = 1;

diff --git a/drivers/amlogic/media/dtv_demod/atsc_func.c b/drivers/amlogic/media/dtv_demod/atsc_func.c
index d95b1ef..1c11596 100644 (file)
--- a/drivers/amlogic/media/dtv_demod/atsc_func.c
+++ b/drivers/amlogic/media/dtv_demod/atsc_func.c
@@ -565,6 +565,7 @@ if (!field_test_version) {
        atsc_write_reg(0x54d, 0x08);
        atsc_write_reg(0x54c, 0x08);
        atsc_write_reg(0x53b, 0x0e);
+       atsc_write_reg(0x912, 0x50);
 }
        ar_flag = 0;
 }