From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: PROBLEM: Intel HDMI output busticated on 4.4 (regression) Date: Tue, 9 Feb 2016 19:36:41 +0200 Message-ID: <20160209173641.GU23290@intel.com> References: <20160119222622.GA16397@draconx.ca> <569F0D4B.6040607@intel.com> <56A0BC04.9080500@intel.com> <20160209170351.GT23290@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <20160209170351.GT23290@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: "Sharma, Shashank" Cc: Nick Bowler , "linux-kernel@vger.kernel.org" , "dri-devel@lists.freedesktop.org" , Daniel Vetter List-Id: dri-devel@lists.freedesktop.org On Tue, Feb 09, 2016 at 07:03:51PM +0200, Ville Syrj=E4l=E4 wrote: > On Tue, Feb 09, 2016 at 04:39:21PM +0000, Sharma, Shashank wrote: > > Hi Nick,=20 > >=20 > > Sonika is OOO for this week.=20 > > AFAIK about this issue, looks like the live status is not getting s= et for your system, on HPD.=20 > >=20 > > As per the Bspec, we must check live status before trying to read E= DID.=20 > > Is it possible for you to check with an HDMI analyzer and probe liv= e status register ? >=20 > BTW I'm not at all convinced about the current live status bit define= s > we have for g4x. Supposedly someone tested them and found that they > don't match the spec, but IIRC when I tried them on one g4x machine > here, they did match the spec (well, at least for the ports present > on that particular board). >=20 > So something like this may or may not help: >=20 > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i= 915_reg.h > index 188ad5de020f..80c08016e522 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -3302,9 +3302,9 @@ enum skl_disp_power_wells { > * Please check the detailed lore in the commit message for for expe= rimental > * evidence. > */ > -#define PORTD_HOTPLUG_LIVE_STATUS_G4X (1 << 29) > +#define PORTD_HOTPLUG_LIVE_STATUS_G4X (1 << 27) > #define PORTC_HOTPLUG_LIVE_STATUS_G4X (1 << 28) > -#define PORTB_HOTPLUG_LIVE_STATUS_G4X (1 << 27) > +#define PORTB_HOTPLUG_LIVE_STATUS_G4X (1 << 29) > /* VLV DP/HDMI bits again match Bspec */ > #define PORTD_HOTPLUG_LIVE_STATUS_VLV (1 << 27) > #define PORTC_HOTPLUG_LIVE_STATUS_VLV (1 << 28) Just retested the g4x machine here, and port B is definitely on bit 29, port C on bit 28. No port D on ELK, so can't check that. So either someone made a fumble when they tested this originally, or some boards are just wired incorrectly, or CTG is where it was tested and that actually disagrees with the spec for some reason. > --=20 > 2.4.10 >=20 >=20 > >=20 > > Regards > > Shashank > > -----Original Message----- > > From: Nick Bowler [mailto:nbowler@draconx.ca]=20 > > Sent: Tuesday, February 09, 2016 10:03 PM > > To: Jindal, Sonika > > Cc: linux-kernel@vger.kernel.org; dri-devel@lists.freedesktop.org; = Daniel Vetter; Sharma, Shashank > > Subject: Re: PROBLEM: Intel HDMI output busticated on 4.4 (regressi= on) > >=20 > > On 1/28/16, Nick Bowler wrote: > > > On 2016-01-21, Nick Bowler wrote: > > >> On 2016-01-21, Jindal, Sonika wrote: > > >>> On 1/21/2016 8:59 AM, Nick Bowler wrote: > > >>>> On 1/20/16, Nick Bowler wrote: > > >>>>> On 2016-01-20, Jindal, Sonika wrote= : > > >> [...] > > >>>>>> Does the same system works with any other monitor? > > >>>>> I'll see if I can find another to try. > > >>>> I tried another monitor, and the same problem occurs. > > >>> Which make are these monitors? > > >> > > >> - LG Flatron W2253V > > >> - Dell E228WFPc > > >> > > >>> Do you have any other system other than G45? > > >> > > >> Nothing else with Linux 4.4, unfortunately. > > > > > > Anything else you want me to try? > > > > > > This issue is still present in 4.5-rc1. > >=20 > > Ping? > >=20 > > HDMI is still broken on my system in 4.5-rc3. > >=20 > > Cheers, > > Nick > > _______________________________________________ > > dri-devel mailing list > > dri-devel@lists.freedesktop.org > > https://lists.freedesktop.org/mailman/listinfo/dri-devel >=20 > --=20 > Ville Syrj=E4l=E4 > Intel OTC > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel --=20 Ville Syrj=E4l=E4 Intel OTC