shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 10:58:48 +09:00
Code Issues Packages Projects Releases Wiki Activity

tda1004x: only update the frontend properties if locked

Browse Source 
commit e8beb02343 upstream.

The tda1004x was updating the properties cache before locking.
If the device is not locked, the data at the registers are just
random values with no real meaning.

This caused the driver to fail with libdvbv5, as such library
calls GET_PROPERTY from time to time, in order to return the
DVB stats.

Tested with a saa7134 card 78:
	ASUSTeK P7131 Dual, vendor PCI ID: 1043:4862

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mauro Carvalho Chehab
2016-02-03 17:33:48 -02:00
committed by Greg Kroah-Hartman
parent 368e554ba6
commit e862efec72
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/media/dvb-frontends/tda1004x.c
View File

@@ -903,9 +903,18 @@ static int tda1004x_get_fe(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
struct tda1004x_state* state = fe->demodulator_priv;
int status;
dprintk("%s\n", __func__);
status = tda1004x_read_byte(state, TDA1004X_STATUS_CD);
if (status == -1)
return -EIO;
/* Only update the properties cache if device is locked */
if (!(status & 8))
return 0;
// inversion status
fe_params->inversion = INVERSION_OFF;
if (tda1004x_read_byte(state, TDA1004X_CONFC1) & 0x20)