[media] saa7134: add vidioc_querystd

Signed-off-by: Mikhail Domrachev <mihail.domrychev@comexp.ru>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>

1 files changed, 39 insertions, 2 deletions

diff --git a/drivers/media/pci/saa7134/saa7134-video.c b/drivers/media/pci/saa7134/saa7134-video.c
index e5b2bebaf010..16140ad6ffb3 100644
--- a/drivers/media/pci/saa7134/saa7134-video.c
+++ b/drivers/media/pci/saa7134/saa7134-video.c
@@ -452,19 +452,26 @@ static void video_mux(struct saa7134_dev *dev, int input)
 
 static void saa7134_set_decoder(struct saa7134_dev *dev)
 {
-        int luma_control, sync_control, mux;
+        int luma_control, sync_control, chroma_ctrl1, mux;
 
         struct saa7134_tvnorm *norm = dev->tvnorm;
         mux = card_in(dev, dev->ctl_input).vmux;
 
         luma_control = norm->luma_control;
         sync_control = norm->sync_control;
+        chroma_ctrl1 = norm->chroma_ctrl1;
 
         if (mux > 5)
                 luma_control |= 0x80; /* svideo */
         if (noninterlaced || dev->nosignal)
                 sync_control |= 0x20;
 
+        /* switch on auto standard detection */
+        sync_control |= SAA7134_SYNC_CTRL_AUFD;
+        chroma_ctrl1 |= SAA7134_CHROMA_CTRL1_AUTO0;
+        chroma_ctrl1 &= ~SAA7134_CHROMA_CTRL1_FCTC;
+        luma_control &= ~SAA7134_LUMA_CTRL_LDEL;
+
         /* setup video decoder */
         saa_writeb(SAA7134_INCR_DELAY,            0x08);
         saa_writeb(SAA7134_ANALOG_IN_CTRL1,       0xc0 | mux);
@@ -487,7 +494,7 @@ static void saa7134_set_decoder(struct saa7134_dev *dev)
                 dev->ctl_invert ? -dev->ctl_saturation : dev->ctl_saturation);
 
         saa_writeb(SAA7134_DEC_CHROMA_HUE,        dev->ctl_hue);
-        saa_writeb(SAA7134_CHROMA_CTRL1,          norm->chroma_ctrl1);
+        saa_writeb(SAA7134_CHROMA_CTRL1,          chroma_ctrl1);
         saa_writeb(SAA7134_CHROMA_GAIN,           norm->chroma_gain);
 
         saa_writeb(SAA7134_CHROMA_CTRL2,          norm->chroma_ctrl2);
@@ -1686,6 +1693,35 @@ int saa7134_g_std(struct file *file, void *priv, v4l2_std_id *id)
 }
 EXPORT_SYMBOL_GPL(saa7134_g_std);
 
+static v4l2_std_id saa7134_read_std(struct saa7134_dev *dev)
+{
+        static v4l2_std_id stds[] = {
+                V4L2_STD_UNKNOWN,
+                V4L2_STD_NTSC,
+                V4L2_STD_PAL,
+                V4L2_STD_SECAM };
+
+        v4l2_std_id result = 0;
+
+        u8 st1 = saa_readb(SAA7134_STATUS_VIDEO1);
+        u8 st2 = saa_readb(SAA7134_STATUS_VIDEO2);
+
+        if (!(st2 & 0x1)) /* RDCAP == 0 */
+                result = V4L2_STD_UNKNOWN;
+        else
+                result = stds[st1 & 0x03];
+
+        return result;
+}
+
+int saa7134_querystd(struct file *file, void *priv, v4l2_std_id *std)
+{
+        struct saa7134_dev *dev = video_drvdata(file);
+        *std &= saa7134_read_std(dev);
+        return 0;
+}
+EXPORT_SYMBOL_GPL(saa7134_querystd);
+
 static int saa7134_cropcap(struct file *file, void *priv,
                                         struct v4l2_cropcap *cap)
 {
@@ -2079,6 +2115,7 @@ static const struct v4l2_ioctl_ops video_ioctl_ops = {
         .vidioc_dqbuf                   = saa7134_dqbuf,
         .vidioc_s_std                   = saa7134_s_std,
         .vidioc_g_std                   = saa7134_g_std,
+        .vidioc_querystd                = saa7134_querystd,
         .vidioc_enum_input              = saa7134_enum_input,
         .vidioc_g_input                 = saa7134_g_input,
         .vidioc_s_input                 = saa7134_s_input,