From: Hans de Goede <hdegoede@redhat.com>
To: Lyude Paul <lyude@redhat.com>,
dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
nouveau@lists.freedesktop.org
Cc: Thomas Zimmermann <tzimmermann@suse.de>,
Sean Paul <seanpaul@google.com>, David Airlie <airlied@linux.ie>,
linux-kernel@vger.kernel.org,
Alex Deucher <alexander.deucher@amd.com>,
Mikita Lipski <mikita.lipski@amd.com>
Subject: Re: [PATCH 0/3] drm/dp_mst: Fix bandwidth checking regressions from DSC patches
Date: Thu, 5 Mar 2020 17:41:04 +0100 [thread overview]
Message-ID: <89275eb6-662d-73d1-a593-8271df5aadc0@redhat.com> (raw)
In-Reply-To: <20200304223614.312023-1-lyude@redhat.com>
Hi Lyude,
On 3/4/20 11:36 PM, Lyude Paul wrote:
> AMD's patch series for adding DSC support to the MST helpers
> unfortunately introduced a few regressions into the kernel that I didn't
> get around to fixing until just now. I would have reverted the changes
> earlier, but seeing as that would have reverted all of amd's DSC support
> + everything that was done on top of that I realllllly wanted to avoid
> doing that.
>
> Anyway, this should fix everything as far as I can tell. Note that I
> don't have any DSC displays locally yet, so if someone from AMD could
> sanity check this I would appreciate it ♥.
Thank you for trying to fix this, unfortunately for me this is not fixed,
with this series. My setup:
5.6-rc4 + your 3 patches (+ some unrelated patches outside of drm)
-Lenovo x1 7th gen +
Lenovo TB3 dock gen 2 +
2 external 1920x1080@60 monitors connected to the 2 HDMI interfaces on the dock
-System booted with the LID closed, so that the firmware/BIOS has already
initialized both monitors when the kernel boots
This should be fairly easy to reproduce on a similar setup, other
users are seeing similar problems when connecting more then 1 monitor
to DP-MST docks, see e.g. :
https://bugzilla.redhat.com/show_bug.cgi?id=1809681
https://bugzilla.redhat.com/show_bug.cgi?id=1810070
Let me know if you want me to collect some drm.debug logs, I guess
if you do, you want me to use drm.debug=0x114 ?
Regards,
Hans
>
> Cc: Mikita Lipski <mikita.lipski@amd.com>
> Cc: Alex Deucher <alexander.deucher@amd.com>
> Cc: Sean Paul <seanpaul@google.com>
> Cc: Hans de Goede <hdegoede@redhat.com>
>
> Lyude Paul (3):
> drm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less
> redundant
> drm/dp_mst: Don't show connectors as connected before probing
> available PBN
> drm/dp_mst: Rewrite and fix bandwidth limit checks
>
> drivers/gpu/drm/drm_dp_mst_topology.c | 124 ++++++++++++++++++++------
> 1 file changed, 96 insertions(+), 28 deletions(-)
>
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prev parent reply other threads:[~2020-03-05 16:41 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-04 22:36 [PATCH 0/3] drm/dp_mst: Fix bandwidth checking regressions from DSC patches Lyude Paul
2020-03-04 22:36 ` [PATCH 1/3] drm/dp_mst: Rename drm_dp_mst_is_dp_mst_end_device() to be less redundant Lyude Paul
2020-03-04 22:36 ` [PATCH 2/3] drm/dp_mst: Don't show connectors as connected before probing available PBN Lyude Paul
2020-03-05 13:11 ` Ville Syrjälä
2020-03-05 18:13 ` Lyude Paul
2020-03-05 18:29 ` Ville Syrjälä
2020-03-05 18:52 ` Lyude Paul
2020-03-05 19:44 ` Lyude Paul
2020-03-06 20:03 ` Lyude Paul
2020-03-06 21:22 ` Lyude Paul
2020-03-04 22:36 ` [PATCH 3/3] drm/dp_mst: Rewrite and fix bandwidth limit checks Lyude Paul
2020-03-05 16:41 ` Hans de Goede [this message]
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