Commit 5e3b1d03 authored Dec 11, 2017 by Ron Economos Committed by Greg Kroah-Hartman Mar 24, 2018

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>

parent 4716cf97

drivers/media/dvb-frontends/si2168.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;
		@@ -380,6 +382,7 @@ 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;