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| author | Ron Economos <w6rz@comcast.net> | 2017-12-12 03:51:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-03-24 12:58:47 +0300 |
| commit | 17a660a3487ef785f93dfc35df30869450378303 (patch) | |
| tree | d92b21050e81c5f693624fa3f96c1098ec7a4835 | |
| parent | 3e99ac9ca8208e645a80b9ac80e1b79abd4a671e (diff) | |
| download | linux-17a660a3487ef785f93dfc35df30869450378303.tar.xz | |
media: [RESEND] media: dvb-frontends: Add delay to Si2168 restart
[ Upstream commit 380a6c86457573aa42d27ae11e025eb25941a0b7 ]
On faster CPUs a delay is required after the resume command and the restart command. Without the delay, the restart command often returns -EREMOTEIO and the Si2168 does not restart.
Note that this patch fixes the same issue as https://patchwork.linuxtv.org/patch/44304/, but I believe my udelay() fix addresses the actual problem.
Signed-off-by: Ron Economos <w6rz@comcast.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/media/dvb-frontends/si2168.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/si2168.c b/drivers/media/dvb-frontends/si2168.c index 821a8f481507..9d6270591858 100644 --- a/drivers/media/dvb-frontends/si2168.c +++ b/drivers/media/dvb-frontends/si2168.c @@ -14,6 +14,8 @@ * GNU General Public License for more details. */ +#include <linux/delay.h> + #include "si2168_priv.h" static const struct dvb_frontend_ops si2168_ops; @@ -420,6 +422,7 @@ static int si2168_init(struct dvb_frontend *fe) if (ret) goto err; + udelay(100); memcpy(cmd.args, "\x85", 1); cmd.wlen = 1; cmd.rlen = 1; |