From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BA393376F3; Tue, 13 Feb 2024 11:42:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707824521; cv=none; b=KJmIemVvSu9Ih3vwwjBscVbZtCSKu172ys2eLgh6K5NCv7s+dIll4x524zdlPCD+7LTWpRGd5xOBi1mtkVe9UObFZJ3HFdjigtDEQ6Nizjrt28YuJ54HIvAVN7IMxIYZz759pEcblGMOTTPpYmlKExwsZSgBPn9kp3TAk012Y1A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707824521; c=relaxed/simple; bh=1GtEqKV+wQs0MT2SIs+9S6c4LRpp7sxXEmK272Gtxpg=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=S32zIvEFuX6zTXkA5Qg9jiaUT8nleJrj8N0vi7s4otDpvMiU8qowEtlENoDSAqdhhUAsDeZKlUmKPqosq2ItYwAWI/jTwe6w3skbv9eVMEDrDKn2axadAcX68Cs071oeZ0+Pg/a4WoeXI/65xUlCjqu75ohduPWkxbn5jfmTVmA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZGgT/ET7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZGgT/ET7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2ED0DC433C7; Tue, 13 Feb 2024 11:42:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707824521; bh=1GtEqKV+wQs0MT2SIs+9S6c4LRpp7sxXEmK272Gtxpg=; h=Date:From:To:Cc:Subject:From; b=ZGgT/ET7ls9NrBGdLxIAC0UWI4xJYDbxoV9/v+C/uAWRn0JFRVxM93plQwxAKyLBb Hly2wL+syAtopYQ6Vb0znNINhkDdxjsOgd6XDrJ/vYfJnBPNgL70AQ6H4UdXSvYzRn Zx1Qzk++dZx9WWT/Iuwgjuo7p5Fd0dchYjhkL2a9GRD1nLavEoBWbEp0L4ySefp8Zf HN1WV6a5QHbOLs1Ffj2qyxMCx3LgyOW0TfSGwARG1bByAPHEJ0DBI4EhmkzsduosLi 9E6eiG7fR899DrgOlWWMXVGz+feqhf4OLNnJi8uOoR6VgK9cWa1nfDbJADd58FIJDz OCMMIQT1kIujA== Received: from johan by xi.lan with local (Exim 4.97.1) (envelope-from ) id 1rZrB2-000000007yd-1wrs; Tue, 13 Feb 2024 12:42:17 +0100 Date: Tue, 13 Feb 2024 12:42:16 +0100 From: Johan Hovold To: Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Kuogee Hsieh Cc: Sean Paul , Marijn Suijten , David Airlie , Daniel Vetter , Bjorn Andersson , quic_jesszhan@quicinc.com, quic_sbillaka@quicinc.com, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, regressions@lists.linux.dev, linux-kernel@vger.kernel.org Subject: drm/msm: DisplayPort regressions in 6.8-rc1 Message-ID: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi, Since 6.8-rc1 the internal eDP display on the Lenovo ThinkPad X13s does not always show up on boot. The logs indicate problems with the runtime PM and eDP rework that went into 6.8-rc1: [ 6.006236] Console: switching to colour dummy device 80x25 [ 6.007542] [drm:dpu_kms_hw_init:1048] dpu hardware revision:0x80000000 [ 6.007872] [drm:drm_bridge_attach [drm]] *ERROR* failed to attach bridge /soc@0/phy@88eb000 to encoder TMDS-31: -16 [ 6.007934] [drm:dp_bridge_init [msm]] *ERROR* failed to attach panel bridge: -16 [ 6.007983] msm_dpu ae01000.display-controller: [drm:msm_dp_modeset_init [msm]] *ERROR* failed to create dp bridge: -16 [ 6.008030] [drm:_dpu_kms_initialize_displayport:588] [dpu error]modeset_init failed for DP, rc = -16 [ 6.008050] [drm:_dpu_kms_setup_displays:681] [dpu error]initialize_DP failed, rc = -16 [ 6.008068] [drm:dpu_kms_hw_init:1153] [dpu error]modeset init failed: -16 [ 6.008388] msm_dpu ae01000.display-controller: [drm:msm_drm_kms_init [msm]] *ERROR* kms hw init failed: -16 and this can also manifest itself as a NULL-pointer dereference: [ 7.339447] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 7.643705] pc : drm_bridge_attach+0x70/0x1a8 [drm] [ 7.686415] lr : drm_aux_bridge_attach+0x24/0x38 [aux_bridge] [ 7.769039] Call trace: [ 7.771564] drm_bridge_attach+0x70/0x1a8 [drm] [ 7.776234] drm_aux_bridge_attach+0x24/0x38 [aux_bridge] [ 7.781782] drm_bridge_attach+0x80/0x1a8 [drm] [ 7.786454] dp_bridge_init+0xa8/0x15c [msm] [ 7.790856] msm_dp_modeset_init+0x28/0xc4 [msm] [ 7.795617] _dpu_kms_drm_obj_init+0x19c/0x680 [msm] [ 7.800731] dpu_kms_hw_init+0x348/0x4c4 [msm] [ 7.805306] msm_drm_kms_init+0x84/0x324 [msm] [ 7.809891] msm_drm_bind+0x1d8/0x3a8 [msm] [ 7.814196] try_to_bring_up_aggregate_device+0x1f0/0x2f8 [ 7.819747] __component_add+0xa4/0x18c [ 7.823703] component_add+0x14/0x20 [ 7.827389] dp_display_probe+0x47c/0x568 [msm] [ 7.832052] platform_probe+0x68/0xd8 Users have also reported random crashes at boot since 6.8-rc1, and I've been able to trigger hard crashes twice when testing an external display (USB-C/DP), which may also be related to the DP regressions. I've opened an issue here: https://gitlab.freedesktop.org/drm/msm/-/issues/51 but I also want Thorsten's help to track this so that it gets fixed before 6.8 is released. #regzbot introduced: v6.7..v6.8-rc1 The following series is likely the culprit: https://lore.kernel.org/all/1701472789-25951-1-git-send-email-quic_khsieh@quicinc.com/ Johan