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authorMauro Carvalho Chehab <mchehab@redhat.com>2011-10-04 16:44:02 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-10-08 15:01:34 +0400
commit5d1ed98683abafef595b8e3a237f845b82152606 (patch)
tree823d8b53ddadc9c45308ee357e2fafb033d8be5e /drivers/media/video/msp3400-driver.c
parent8d6c0b216fd9a7f4b34aca6bd822756b9ef5690b (diff)
downloadlinux-5d1ed98683abafef595b8e3a237f845b82152606.tar.xz
[media] msp3400: Add standards detection to the driver
As msp3400 allows standards detection, add support for it. That efectivelly means that devices with msp3400 can now implement VIDIOC_QUERYSTD, and it will provide very good detection for the standard, specially if combined with a video decoder detection. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/msp3400-driver.c')
-rw-r--r--drivers/media/video/msp3400-driver.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/media/video/msp3400-driver.c b/drivers/media/video/msp3400-driver.c
index c43c81f5f978..d0f538857285 100644
--- a/drivers/media/video/msp3400-driver.c
+++ b/drivers/media/video/msp3400-driver.c
@@ -426,6 +426,20 @@ static int msp_s_frequency(struct v4l2_subdev *sd, struct v4l2_frequency *freq)
return 0;
}
+static int msp_querystd(struct v4l2_subdev *sd, v4l2_std_id *id)
+{
+ struct msp_state *state = to_state(sd);
+ struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+ *id &= state->detected_std;
+
+ v4l_dbg(2, msp_debug, client,
+ "detected standard: %s(0x%08Lx)\n",
+ msp_standard_std_name(state->std), state->detected_std);
+
+ return 0;
+}
+
static int msp_s_std(struct v4l2_subdev *sd, v4l2_std_id id)
{
struct msp_state *state = to_state(sd);
@@ -616,6 +630,10 @@ static const struct v4l2_subdev_core_ops msp_core_ops = {
.s_std = msp_s_std,
};
+static const struct v4l2_subdev_video_ops msp_video_ops = {
+ .querystd = msp_querystd,
+};
+
static const struct v4l2_subdev_tuner_ops msp_tuner_ops = {
.s_frequency = msp_s_frequency,
.g_tuner = msp_g_tuner,
@@ -630,6 +648,7 @@ static const struct v4l2_subdev_audio_ops msp_audio_ops = {
static const struct v4l2_subdev_ops msp_ops = {
.core = &msp_core_ops,
+ .video = &msp_video_ops,
.tuner = &msp_tuner_ops,
.audio = &msp_audio_ops,
};
@@ -664,6 +683,7 @@ static int msp_probe(struct i2c_client *client, const struct i2c_device_id *id)
v4l2_i2c_subdev_init(sd, client, &msp_ops);
state->v4l2_std = V4L2_STD_NTSC;
+ state->detected_std = V4L2_STD_ALL;
state->audmode = V4L2_TUNER_MODE_STEREO;
state->input = -1;
state->i2s_mode = 0;