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authorRon Economos <w6rz@comcast.net>2017-12-11 19:51:53 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-03-24 10:58:47 +0100
commit17a660a3487ef785f93dfc35df30869450378303 (patch)
treed92b21050e81c5f693624fa3f96c1098ec7a4835
parent3e99ac9ca8208e645a80b9ac80e1b79abd4a671e (diff)
downloadlinux-linaro-stable-17a660a3487ef785f93dfc35df30869450378303.tar.gz
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.c3
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;