[media] it913x-fe changes to power up and down of tuner
Currently the tuner is constantly powered causing these effects.
1. Remembering last tune channel causing corruptions of changing channel.
2. Causing corruption on other frontend.
3. Higher current in standby of demodulator with clock running.
Power sequence now follows;
Power Up
Tuner on -> Frontend suspend off -> Tuner clk on
Power Down
Frontend suspend on -> Tuner clk off -> Tuner off
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/dvb/frontends/it913x-fe.c b/drivers/media/dvb/frontends/it913x-fe.c
index 02839a8b7..d4bd24e 100644
--- a/drivers/media/dvb/frontends/it913x-fe.c
+++ b/drivers/media/dvb/frontends/it913x-fe.c
@@ -626,7 +626,7 @@
for (i = 0; i < 128; i++) {
ret = it913x_read_reg(state, SUSPEND_FLAG, &b, 1);
if (ret < 0)
- return -EINVAL;
+ return -ENODEV;
if (b == 0)
break;
@@ -634,18 +634,23 @@
ret |= it913x_write_reg(state, PRO_DMOD, AFE_MEM0, 0x8);
/* Turn LED off */
- ret = it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x0);
+ ret |= it913x_write_reg(state, PRO_LINK, GPIOH3_O, 0x0);
- return 0;
+ ret |= it913x_fe_script_loader(state, it9137_tuner_off);
+
+ return (ret < 0) ? -ENODEV : 0;
}
+/* Power sequence */
+/* Power Up Tuner on -> Frontend suspend off -> Tuner clk on */
+/* Power Down Frontend suspend on -> Tuner clk off -> Tuner off */
+
static int it913x_fe_sleep(struct dvb_frontend *fe)
{
struct it913x_fe_state *state = fe->demodulator_priv;
return it913x_fe_suspend(state);
}
-
static u32 compute_div(u32 a, u32 b, u32 x)
{
u32 res = 0;
@@ -738,11 +743,21 @@
{
struct it913x_fe_state *state = fe->demodulator_priv;
int ret = 0;
+ /* Power Up Tuner - common all versions */
+ ret = it913x_write_reg(state, PRO_DMOD, 0xec40, 0x1);
- it913x_write_reg(state, PRO_DMOD, AFE_MEM0, 0x0);
+ ret |= it913x_write_reg(state, PRO_DMOD, AFE_MEM0, 0x0);
ret |= it913x_fe_script_loader(state, init_1);
+ switch (state->tuner_type) {
+ case IT9137:
+ ret |= it913x_write_reg(state, PRO_DMOD, 0xfba8, 0x0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
return (ret < 0) ? -ENODEV : 0;
}
@@ -820,5 +835,5 @@
MODULE_DESCRIPTION("it913x Frontend and it9137 tuner");
MODULE_AUTHOR("Malcolm Priestley tvboxspy@gmail.com");
-MODULE_VERSION("1.06");
+MODULE_VERSION("1.07");
MODULE_LICENSE("GPL");