V4L/DVB (8176): pvrusb2: Update video_gop_size

When switching video standard, ensure that video GOP size remains
appropriately configured.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 19 insertions, 2 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index de0f41b956bd..a5217a2cf4c0 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -2456,18 +2456,35 @@ static int pvr2_hdw_commit_execute(struct pvr2_hdw *hdw)
         /* Handle some required side effects when the video standard is
            changed.... */
         if (hdw->std_dirty) {
-                /* Rewrite the vertical resolution to be appropriate to the
-                   video standard that has been selected. */
                 int nvres;
+                int gop_size;
                 if (hdw->std_mask_cur & V4L2_STD_525_60) {
                         nvres = 480;
+                        gop_size = 15;
                 } else {
                         nvres = 576;
+                        gop_size = 12;
                 }
+                /* Rewrite the vertical resolution to be appropriate to the
+                   video standard that has been selected. */
                 if (nvres != hdw->res_ver_val) {
                         hdw->res_ver_val = nvres;
                         hdw->res_ver_dirty = !0;
                 }
+                /* Rewrite the GOP size to be appropriate to the video
+                   standard that has been selected. */
+                if (gop_size != hdw->enc_ctl_state.video_gop_size) {
+                        struct v4l2_ext_controls cs;
+                        struct v4l2_ext_control c1;
+                        memset(&cs, 0, sizeof(cs));
+                        memset(&c1, 0, sizeof(c1));
+                        cs.controls = &c1;
+                        cs.count = 1;
+                        c1.id = V4L2_CID_MPEG_VIDEO_GOP_SIZE;
+                        c1.value = gop_size;
+                        cx2341x_ext_ctrls(&hdw->enc_ctl_state, 0, &cs,
+                                          VIDIOC_S_EXT_CTRLS);
+                }
         }
 
         if (hdw->input_dirty && hdw->state_pathway_ok &&