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[REVIEW,19/86] rtl28xxu: add module parameter to disable IR

Message ID 1391935771-18670-20-git-send-email-crope@iki.fi (mailing list archive)
State New, archived
Headers show

Commit Message

Antti Palosaari Feb. 9, 2014, 8:48 a.m. UTC 
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>
---
 drivers/media/usb/dvb-usb-v2/rtl28xxu.c | 7 +++++++
 1 file changed, 7 insertions(+)
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Patch

diff --git a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
index 6a5eb0f..77f1fc9 100644
--- a/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
+++ b/drivers/media/usb/dvb-usb-v2/rtl28xxu.c
@@ -36,6 +36,9 @@ 
 #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)
@@ -1325,6 +1328,10 @@  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;