From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Shevchenko Subject: Re: Diagnosing ACPI trouble related to pinctr_cherryview on 4.4.x Date: Tue, 22 Mar 2016 17:58:09 +0200 Message-ID: <1458662289.5907.1.camel@linux.intel.com> References: <20160322152218.GA2099@lahna.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mga11.intel.com ([192.55.52.93]:35889 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752168AbcCVP5S (ORCPT ); Tue, 22 Mar 2016 11:57:18 -0400 In-Reply-To: <20160322152218.GA2099@lahna.fi.intel.com> Sender: linux-gpio-owner@vger.kernel.org List-Id: linux-gpio@vger.kernel.org To: Mika Westerberg , Martin Langhoff Cc: Heikki Krogerus , Linus Walleij , linux-gpio@vger.kernel.org On Tue, 2016-03-22 at 17:22 +0200, Mika Westerberg wrote: > On Tue, Mar 22, 2016 at 11:09:51AM -0400, Martin Langhoff wrote: > >=20 > > =C2=A0=C2=A0=C2=A0Hi pinctrl_cherryview maintainers. > > =C2=A0=C2=A0=C2=A0I unsuspectingly bought a laptop for a family mem= ber which hits > > trouble > > =C2=A0=C2=A0=C2=A0with pinctrl_cherryview; it only boots with the m= odule > > blacklisted or > > =C2=A0=C2=A0=C2=A0acpi=3Doff . > > =C2=A0=C2=A0=C2=A0System is (trying) to run Fedora 23 -- made more = difficult by > > recent > > =C2=A0=C2=A0=C2=A0Fedora kernels having the module built-in. > > =C2=A0=C2=A0=C2=A0Are there any useful debugging steps I can follow= to narrow this > > down? > > =C2=A0=C2=A0=C2=A0Already tried the acpi diagnostics steps (acpi=3D= ht, etc) to no > > avail. > > =C2=A0=C2=A0=C2=A0thank you! > I think this is a known issue. >=20 > Please disable dw_dmac from your .config (or blacklist the module): >=20 > =C2=A0 CONFIG_DW_DMAC_CORE=3Dn > =C2=A0 CONFIG_DW_DMAC=3Dn >=20 > You can also enable pinctrl-cherryview.c. >=20 > Andy (Cc'd) is working a fix for this DMA hang issue. The issue Mika pointed out is described in the kernel bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=3D101271 However it might be not the same issue. --=20 Andy Shevchenko Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html