[media] rtl28xxu: add module parameter to disable IR

Disable IR interrupts in order to avoid SDR sample loss.
IR interrupts causes some extra load for device and it seems
be one reason to loss samples when sampling rate is high.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index a331af19b3a7dc6d1f182827ed9c7cf17833dd29..5e223e807de1137f980eecc39e3a23b7b9a2af2b 100644 (file)
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -35,6 +35,9 @@
 #include "tua9001.h"
 #include "r820t.h"
 
+static int rtl28xxu_disable_rc;
+module_param_named(disable_rc, rtl28xxu_disable_rc, int, 0644);
+MODULE_PARM_DESC(disable_rc, "disable RTL2832U remote controller");
 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
 
 static int rtl28xxu_ctrl_msg(struct dvb_usb_device *d, struct rtl28xxu_req *req)
@@ -1322,6 +1325,10 @@ err:
 static int rtl2832u_get_rc_config(struct dvb_usb_device *d,
                struct dvb_usb_rc *rc)
 {
+       /* disable IR interrupts in order to avoid SDR sample loss */
+       if (rtl28xxu_disable_rc)
+               return rtl28xx_wr_reg(d, IR_RX_IE, 0x00);
+
        /* load empty to enable rc */
        if (!rc->map_name)
                rc->map_name = RC_MAP_EMPTY;