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[media] nuvoton-cir: fix wake from suspend

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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 <davetreacy@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Jarod Wilson 2011-03-01 12:38:02 -03:00 committed by Mauro Carvalho Chehab
parent e3bfeabbf5
commit 3198ed161c
2 changed files with 8 additions and 4 deletions
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5
drivers/media/rc/nuvoton-cir.c
View file

@ -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,

7
drivers/media/rc/nuvoton-cir.h
View file

@ -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