Provide R820 gain controls to userspace via V4L2 API. LNA, Mixer
and IF gain controls are offered, each one both manual and automode.
Signed-off-by: Antti Palosaari <cr...@iki.fi>
---
drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c | 41 ++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
index ee72233..69fc996 100644
--- a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
+++ b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c
@@ -26,6 +26,7 @@
#include "rtl2832_sdr.h"
#include "dvb_usb.h"
#include "e4000.h"
+#include "r820t.h"
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
@@ -947,6 +948,30 @@ err:
return ret;
};
+static int rtl2832_sdr_set_gain_r820t(struct rtl2832_sdr_state *s)
+{
+ int ret;
+ struct dvb_frontend *fe = s->fe;
+ struct r820t_ctrl ctrl;
+ dev_dbg(&s->udev->dev, "%s: lna=%d mixer=%d if=%d\n", __func__,
+ s->lna_gain->val, s->mixer_gain->val, s->if_gain->val);
+
+ ctrl.lna_gain = s->lna_gain_auto->val ? INT_MIN : s->lna_gain->val;
+ ctrl.mixer_gain = s->mixer_gain_auto->val ? INT_MIN :
s->mixer_gain->val;
+ ctrl.if_gain = s->if_gain_auto->val ? INT_MIN : s->if_gain->val;
+
+ if (fe->ops.tuner_ops.set_config) {
+ ret = fe->ops.tuner_ops.set_config(fe, &ctrl);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+err:
+ dev_dbg(&s->udev->dev, "%s: failed %d\n", __func__, ret);
+ return ret;
+};
+
static int rtl2832_sdr_set_gain(struct rtl2832_sdr_state *s)
{
int ret;
@@ -955,6 +980,9 @@ static int rtl2832_sdr_set_gain(struct rtl2832_sdr_state *s)
case RTL2832_TUNER_E4000:
ret = rtl2832_sdr_set_gain_e4000(s);
break;
+ case RTL2832_TUNER_R820T:
+ ret = rtl2832_sdr_set_gain_r820t(s);
+ break;
default:
ret = 0;
}
@@ -1442,6 +1470,19 @@ struct dvb_frontend *rtl2832_sdr_attach(struct
dvb_frontend *fe,
s->if_gain = v4l2_ctrl_new_std(&s->hdl, ops, V4L2_CID_IF_GAIN,
0, 54, 1, 0);
v4l2_ctrl_auto_cluster(2, &s->if_gain_auto, 0, false);
break;
+ case RTL2832_TUNER_R820T:
+ v4l2_ctrl_handler_init(&s->hdl, 7);
+ s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_LNA_GAIN_AUTO, 0, 1, 1, 1);
+ s->lna_gain = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_LNA_GAIN, 0, 15, 1, 6);
+ v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
+ s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_MIXER_GAIN_AUTO, 0, 1, 1, 1);
+ s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_MIXER_GAIN, 0, 15, 1, 5);
+ v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
+ s->if_gain_auto = v4l2_ctrl_new_std(&s->hdl, ops,
V4L2_CID_IF_GAIN_AUTO, 0, 1, 1, 1);
+ s->if_gain = v4l2_ctrl_new_std(&s->hdl, ops, V4L2_CID_IF_GAIN,
0, 15, 1, 4);
+ v4l2_ctrl_auto_cluster(2, &s->if_gain_auto, 0, false);
+ s->ctrl_tuner_bw = v4l2_ctrl_new_custom(&s->hdl,
&ctrl_tuner_bw, NULL);
+ break;
default:
v4l2_ctrl_handler_init(&s->hdl, 1);
s->ctrl_tuner_bw = v4l2_ctrl_new_custom(&s->hdl,
&ctrl_tuner_bw, NULL);
--
1.8.5.3
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