From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Daniel Drake <drake@endlessm.com>
Cc: Chris Chiu <chiu@endlessm.com>,
intel-gfx@lists.freedesktop.org,
Linux Upstreaming Team <linux@endlessm.com>,
dri-devel <dri-devel@lists.freedesktop.org>
Subject: Re: i915 4.9 regression: DP AUX CH sanitization no longer working on Asus desktops
Date: Fri, 5 May 2017 13:29:14 +0300 [thread overview]
Message-ID: <20170505102914.GC12629@intel.com> (raw)
In-Reply-To: <CAD8Lp44ZatKVtsYDiX27H_H1AWFHg2iCQ0Kdo2ie+P=KRB4=WA@mail.gmail.com>
On Thu, May 04, 2017 at 02:52:09PM -0600, Daniel Drake wrote:
> On Thu, May 4, 2017 at 2:37 PM, Ville Syrjälä
> <ville.syrjala@linux.intel.com> wrote:
> > Please check if commit bb1d132935c2 ("drm/i915/vbt: split out defaults
> > that are set when there is no VBT") fixes things for you.
>
> I think this is not going to help. This would only make a difference
> when there is no VBT at all at which point we would see this message
> in the logs:
>
> DRM_INFO("Failed to find VBIOS tables (VBT)\n");
No, the patch will in fact make a difference only when there is a VBT.
>
> but in this case we have a VBT for ports B, C and E.
>
> [drm:intel_bios_init [i915]] Port B VBT info: DP:1 HDMI:1 DVI:1 EDP:0 CRT:0
> [drm:intel_bios_init [i915]] VBT HDMI level shift for port B: 8
> [drm:intel_bios_init [i915]] Port C VBT info: DP:0 HDMI:1 DVI:1 EDP:0 CRT:0
> [drm:intel_bios_init [i915]] VBT HDMI level shift for port C: 8
> [drm:intel_bios_init [i915]] Port E VBT info: DP:1 HDMI:0 DVI:0 EDP:0 CRT:0
> [drm:intel_bios_init [i915]] VBT HDMI level shift for port E: 0
>
> Let me know if I'm missing something and we will test it anyway
Please do.
--
Ville Syrjälä
Intel OTC
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next prev parent reply other threads:[~2017-05-05 10:29 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-04 20:21 i915 4.9 regression: DP AUX CH sanitization no longer working on Asus desktops Daniel Drake
2017-05-04 20:37 ` Ville Syrjälä
2017-05-04 20:52 ` Daniel Drake
2017-05-04 21:14 ` Manasi Navare
2017-05-05 10:29 ` Ville Syrjälä [this message]
2017-05-24 13:50 ` Daniel Drake
2017-05-26 11:26 ` [Intel-gfx] " Jani Nikula
2017-05-05 6:24 ` Jani Nikula
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