diff options
| author | Ulrich Hecht | 2015-11-10 14:39:00 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab | 2015-11-17 17:56:59 +0100 |
| commit | 16dfe72fd879abc98255bbea62fae9d312ef3b5a (patch) | |
| tree | b2b367981692068090d6767e1f00f6718154e952 /drivers/media/i2c/adv7180.c | |
| parent | [media] usbvision fix overflow of interfaces array (diff) | |
| download | kernel-qcow2-linux-16dfe72fd879abc98255bbea62fae9d312ef3b5a.tar.gz kernel-qcow2-linux-16dfe72fd879abc98255bbea62fae9d312ef3b5a.tar.xz kernel-qcow2-linux-16dfe72fd879abc98255bbea62fae9d312ef3b5a.zip | |
[media] media: adv7180: increase delay after reset to 5ms
Initialization of the ADV7180 chip fails on the Renesas R8A7790-based
Lager board about 50% of the time. This patch resolves the issue by
increasing the minimum delay after reset from 2 ms to 5 ms, following the
recommendation in the ADV7180 datasheet:
"Executing a software reset takes approximately 2 ms. However, it is
recommended to wait 5 ms before any further I2C writes are performed."
Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media/i2c/adv7180.c')
| -rw-r--r-- | drivers/media/i2c/adv7180.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c index f82c8aa164fa..3c3c4bfe3866 100644 --- a/drivers/media/i2c/adv7180.c +++ b/drivers/media/i2c/adv7180.c @@ -1112,7 +1112,7 @@ static int init_device(struct adv7180_state *state) mutex_lock(&state->mutex); adv7180_write(state, ADV7180_REG_PWR_MAN, ADV7180_PWR_MAN_RES); - usleep_range(2000, 10000); + usleep_range(5000, 10000); ret = state->chip_info->init(state); if (ret) |