V4L/DVB (7390): saa7134: clear audio DSP interface after access error

In the case of an access error to the high latency registers of
the audio DSP, the interface needs to be cleared, otherwise a cascade
of errors occurs.

This patch is closely modeled after a proposal by Mirek Slugen

Signed-off-by: Hartmut Hackmann <hartmut.hackmann@t-online.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/media/video/saa7134/saa7134-reg.h b/drivers/media/video/saa7134/saa7134-reg.h
index ac6431ba4fc3..86f5eefdb0f6 100644
--- a/drivers/media/video/saa7134/saa7134-reg.h
+++ b/drivers/media/video/saa7134/saa7134-reg.h
@@ -365,6 +365,9 @@
 #define SAA7135_DSP_RWSTATE_RDB                 (1 << 1)
 #define SAA7135_DSP_RWSTATE_WRR                 (1 << 0)
 
+#define SAA7135_DSP_RWCLEAR                     0x586
+#define SAA7135_DSP_RWCLEAR_RERR                    1
+
 /* ------------------------------------------------------------------ */
 /*
  * Local variables: