From 00f6f92dbbeb3b98d38b26449be0df46b2e6d6a4 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Tue, 22 May 2018 07:33:14 -0400 Subject: media: adv7511: fix incorrect clear of CEC receive interrupt If a CEC message was received and the RX interrupt was set, but not yet processed, and a new transmit was issues, then the transmit code would inadvertently clear the RX interrupt and after that no new messages would ever be received. Instead it should only clear TX interrupts since register 0x97 is a clear-on-write register. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/adv7511.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/adv7511.c b/drivers/media/i2c/adv7511.c index d4b191c..5731751 100644 --- a/drivers/media/i2c/adv7511.c +++ b/drivers/media/i2c/adv7511.c @@ -831,8 +831,8 @@ static int adv7511_cec_adap_transmit(struct cec_adapter *adap, u8 attempts, */ adv7511_cec_write_and_or(sd, 0x12, ~0x70, max(1, attempts - 1) << 4); - /* blocking, clear cec tx irq status */ - adv7511_wr_and_or(sd, 0x97, 0xc7, 0x38); + /* clear cec tx irq status */ + adv7511_wr(sd, 0x97, 0x38); /* write data */ for (i = 0; i < len; i++) -- cgit v1.1