Implement method in pvrusb2 to force the decoder to reset

From: Mike Isely <isely@pobox.com>

This change threads logic through the pvrusb2 to make it possible to
command the decoder chip to reset itself.  The method is
decoder-agnostic; the part of the pvrusb2 which control's that chip's
module has to provide the final hook.  This just lays the foundation.

Signed-off-by: Mike Isely <isely@pobox.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c b/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c
index 6a729c4c7..16757a8fb 100644
--- a/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c
+++ b/linux/drivers/media/video/pvrusb2/pvrusb2-hdw.c
@@ -2420,6 +2420,27 @@ int pvr2_hdw_cmd_powerup(struct pvr2_hdw *hdw)
 }
 
 
+int pvr2_hdw_cmd_decoder_reset(struct pvr2_hdw *hdw)
+{
+	if (!hdw->decoder_ctrl) {
+		pvr2_trace(PVR2_TRACE_INIT,
+			   "Unable to reset decoder: nothing attached");
+		return -ENOTTY;
+	}
+
+	if (!hdw->decoder_ctrl->force_reset) {
+		pvr2_trace(PVR2_TRACE_INIT,
+			   "Unable to reset decoder: not implemented");
+		return -ENOTTY;
+	}
+
+	pvr2_trace(PVR2_TRACE_INIT,
+		   "Requesting decoder reset");
+	hdw->decoder_ctrl->force_reset(hdw->decoder_ctrl->ctxt);
+	return 0;
+}
+
+
 int pvr2_hdw_cmd_usbstream(struct pvr2_hdw *hdw,int runFl)
 {
 	int status;