linux-kernel - Re: [maemo-leste] Modem on Droid 4 (mdm6600) in recent mainline

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Message-ID: <20200729225409.wqboxq77ryvmmxhe@duo.ucw.cz>
Date:   Thu, 30 Jul 2020 00:54:09 +0200
From:   Pavel Machek <pavel@....cz>
To:     kernel list <linux-kernel@...r.kernel.org>, tony@...mide.com,
        merlijn@...zup.org, martin_rysavy@...trum.cz,
        maemo-leste@...ts.dyne.org
Subject: Re: [maemo-leste] Modem on Droid 4 (mdm6600) in recent mainline

Hi!

> There's something very wrong with /dev/ttyUSB4 in recent kernels:
> unsolicited incoming data from the modem are getting lost; I believe
> it means also SMS notifications, but it is very easy to reproduce with
> incoming call notifications.
> 
> They just don't come.
> 
> But if you keep pasting "AT" into minicom, they actually do.
> 
> Of course... that means that trying to debug ofono is ... "interesting".
> 
> I tried playing with
> /sys/bus/platform/drivers/phy-mapphone-mdm6600/usb-phy\@1/power/control
> files and timeouts, but could not get it to work.
> 
> Any idea what could be wrong there?
> 
> Is there easy way to disable power management for testing?

I tried this... and it did not fix the problem :-(.

									Pavel

diff --git a/drivers/phy/motorola/phy-mapphone-mdm6600.c b/drivers/phy/motorola/phy-mapphone-mdm6600.c
index 94a34cf75eb3..7ddf5aa35105 100644
--- a/drivers/phy/motorola/phy-mapphone-mdm6600.c
+++ b/drivers/phy/motorola/phy-mapphone-mdm6600.c
@@ -21,7 +21,7 @@
 #define PHY_MDM6600_PHY_DELAY_MS	4000	/* PHY enable 2.2s to 3.5s */
 #define PHY_MDM6600_ENABLED_DELAY_MS	8000	/* 8s more total for MDM6600 */
 #define PHY_MDM6600_WAKE_KICK_MS	600	/* time on after GPIO toggle */
-#define MDM6600_MODEM_IDLE_DELAY_MS	1000	/* modem after USB suspend */
+#define MDM6600_MODEM_IDLE_DELAY_MS	100000000	/* modem after USB suspend */
 #define MDM6600_MODEM_WAKE_DELAY_MS	200	/* modem response after idle */
 
 enum phy_mdm6600_ctrl_lines {


-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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