V4L/DVB (11194): pvrusb2: Implement mechanism to force a full sub-device update

When a pvrusb2 driver instance first initializes, we need to be sure
to send out a complete state update for everything to all attached
modules.  The old i2c layer did this by keeping a separate mask of
"stale" bits for each attached module - and setting that mask to all
stale when that module attaches.  But the new sub-device adaptation
I've implemented here no longer has per-module stale bits.  So instead
there's now a global "force dirty" bit that is set upon instance
initialization, before the sub-devices are attached.  After the first
update, this bit is cleared, allowing for normal update-on-dirty
behavior.  In this manner, we ensure that all sub-devices have been
properly synchronized at initialization.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c b/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
index 725f391cda5f..5adbf00323e5 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
+++ b/drivers/media/video/pvrusb2/pvrusb2-cx2584x-v4l.c
@@ -325,7 +325,7 @@ int pvr2_i2c_cx2584x_v4l_setup(struct pvr2_hdw *hdw,
 void pvr2_cx25840_subdev_update(struct pvr2_hdw *hdw, struct v4l2_subdev *sd)
 {
         pvr2_trace(PVR2_TRACE_CHIPS, "subdev cx2584x update...");
-        if (hdw->input_dirty) {
+        if (hdw->input_dirty || hdw->force_dirty) {
                 struct v4l2_routing route;
                 enum cx25840_video_input vid_input;
                 enum cx25840_audio_input aud_input;