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media: [RESEND] media: dvb-frontends: Add delay to Si2168 restart

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[ 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>
This commit is contained in:
Ron Economos 2017-12-11 19:51:53 -05:00 committed by Greg Kroah-Hartman
parent 3e99ac9ca8
commit 17a660a348
1 changed files with 3 additions and 0 deletions
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3
drivers/media/dvb-frontends/si2168.c
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@ -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;