[PATCH] media: rc: increase rc-mm tolerance and add debug message

[Sean Young]

Decoding often fails on e.g. redrat3 devices. The dev_dbg() helps
with debugging when decoding does fail.

Cc: Patrick Lerda <patrick9...@free.fr>
Signed-off-by: Sean Young <s...@mess.org>
---
 drivers/media/rc/ir-rcmm-decoder.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/rc/ir-rcmm-decoder.c 
b/drivers/media/rc/ir-rcmm-decoder.c
index 64fb65a9a19f..028df5cb1828 100644
--- a/drivers/media/rc/ir-rcmm-decoder.c
+++ b/drivers/media/rc/ir-rcmm-decoder.c
@@ -79,7 +79,7 @@ static int ir_rcmm_decode(struct rc_dev *dev, struct 
ir_raw_event ev)
                if (!ev.pulse)
                        break;
 
-               if (!eq_margin(ev.duration, RCMM_PREFIX_PULSE, RCMM_UNIT / 2))
+               if (!eq_margin(ev.duration, RCMM_PREFIX_PULSE, RCMM_UNIT))
                        break;
 
                data->state = STATE_LOW;
@@ -91,7 +91,7 @@ static int ir_rcmm_decode(struct rc_dev *dev, struct 
ir_raw_event ev)
                if (ev.pulse)
                        break;
 
-               if (!eq_margin(ev.duration, RCMM_PULSE_0, RCMM_UNIT / 2))
+               if (!eq_margin(ev.duration, RCMM_PULSE_0, RCMM_UNIT))
                        break;
 
                data->state = STATE_BUMP;
@@ -164,6 +164,8 @@ static int ir_rcmm_decode(struct rc_dev *dev, struct 
ir_raw_event ev)
                break;
        }
 
+       dev_dbg(&dev->dev, "RC-MM decode failed at count %d state %d (%uus 
%s)\n",
+               data->count, data->state, TO_US(ev.duration), TO_STR(ev.pulse));
        data->state = STATE_INACTIVE;
        return -EINVAL;
 }
-- 
2.21.0