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Subject: [media] nuvoton-cir: fix wake from suspend
Author:  Jarod Wilson <[email protected]>
Date:    Tue Mar 1 12:38:02 2011 -0300

The CIR Wake FIFO is 67 bytes long, but the stock remote appears to only
populate 65 of them. Limit comparison to 65 bytes, and wake from suspend
works a whole lot better (it wasn't working at all for most folks).

Fix based on comparison with the old lirc_wb677 driver from Nuvoton,
debugging and testing done by Dave Treacy by way of the lirc mailing
list.

Reported-by: Dave Treacy <[email protected]>
Signed-off-by: Jarod Wilson <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 drivers/media/rc/nuvoton-cir.c |    5 +++--
 drivers/media/rc/nuvoton-cir.h |    7 +++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

---

http://git.linuxtv.org/media_tree.git?a=commitdiff;h=3198ed161c9be9bbd15bb2e9c22561248cac6e6a

diff --git a/drivers/media/rc/nuvoton-cir.c b/drivers/media/rc/nuvoton-cir.c
index 273d9d6..d4d6449 100644
--- a/drivers/media/rc/nuvoton-cir.c
+++ b/drivers/media/rc/nuvoton-cir.c
@@ -385,8 +385,9 @@ static void nvt_cir_regs_init(struct nvt_dev *nvt)
 
 static void nvt_cir_wake_regs_init(struct nvt_dev *nvt)
 {
-       /* set number of bytes needed for wake key comparison (default 67) */
-       nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_LEN, CIR_WAKE_FIFO_CMP_DEEP);
+       /* set number of bytes needed for wake from s3 (default 65) */
+       nvt_cir_wake_reg_write(nvt, CIR_WAKE_FIFO_CMP_BYTES,
+                              CIR_WAKE_FIFO_CMP_DEEP);
 
        /* set tolerance/variance allowed per byte during wake compare */
        nvt_cir_wake_reg_write(nvt, CIR_WAKE_CMP_TOLERANCE,
diff --git a/drivers/media/rc/nuvoton-cir.h b/drivers/media/rc/nuvoton-cir.h
index 1df8235..048135e 100644
--- a/drivers/media/rc/nuvoton-cir.h
+++ b/drivers/media/rc/nuvoton-cir.h
@@ -305,8 +305,11 @@ struct nvt_dev {
 #define CIR_WAKE_IRFIFOSTS_RX_EMPTY    0x20
 #define CIR_WAKE_IRFIFOSTS_RX_FULL     0x10
 
-/* CIR Wake FIFO buffer is 67 bytes long */
-#define CIR_WAKE_FIFO_LEN              67
+/*
+ * The CIR Wake FIFO buffer is 67 bytes long, but the stock remote wakes
+ * the system comparing only 65 bytes (fails with this set to 67)
+ */
+#define CIR_WAKE_FIFO_CMP_BYTES                65
 /* CIR Wake byte comparison tolerance */
 #define CIR_WAKE_CMP_TOLERANCE         5
 

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