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Wed, 24 Sep 2025 09:48:23 -0700 Received: from [10.221.136.181] (10.126.230.35) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 24 Sep 2025 09:48:21 -0700 Message-ID: <13fc56f4-402c-4bc3-af8a-4f15af107aa9@nvidia.com> Date: Wed, 24 Sep 2025 18:47:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: ast "WARN_ON(!__ast_dp_wait_enable("ast, enabled)) on reboot To: Thomas Zimmermann , Carol Soto , KuoHsiang Chou CC: "dri-devel@lists.freedesktop.org" , "Matt Ochs" References: <9aebc248-6f63-4f01-bb41-840095e44cd0@suse.de> <27af2540-312e-48fe-b0b4-4155c134d50b@suse.de> Content-Language: en-US From: Nirmoy Das In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-Originating-IP: [10.126.230.35] X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL6PEPF00022575:EE_|SA5PPF0EB7D076B:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f5ea44a-6d46-4530-4c1d-08ddfb8a3766 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230040)(1800799024)(376014)(36860700013)(82310400026)(7053199007); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 24 Sep 2025 16:48:40.8086 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2f5ea44a-6d46-4530-4c1d-08ddfb8a3766 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL6PEPF00022575.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA5PPF0EB7D076B X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Thomas, On 23.09.25 18:46, Thomas Zimmermann wrote: > Hi > > Am 23.09.25 um 17:36 schrieb Carol Soto: >> >> From dmesg we see this: >> >> [ 35.845199] ast 0008:04:00.0: [drm] Using ASPEED DisplayPort >> transmitter >> > > Sure, it detects DP, but do you also connect the monitor via DisplayPort? It is a remote machine so it will be hard to physically verify but looking into the state file. I see that the display is indeed connected to a DP port. cat  /sys/kernel/debug/dri/0008\:04\:00.0/state plane[32]: plane-0         crtc=crtc-0         fb=39                 allocated by = [fbcon]                 refcount=2                 format=XR24 little-endian (0x34325258)                 modifier=0x0                 size=640x480                 layers:                         size[0]=640x480                         pitch[0]=2560                         offset[0]=0                         obj[0]:                                 name=0                                 refcount=2                                 start=00010000                                 size=1245184                                 imported=no                                 pages_use_count=2                                 vmap_use_count=2                                 vaddr=0000000051d78cc3         crtc-pos=640x480+0+0         src-pos=640.000000x480.000000+0.000000+0.000000         rotation=1         normalized-zpos=0         color-encoding=ITU-R BT.601 YCbCr         color-range=YCbCr limited range         color_mgmt_changed=0 plane[34]: plane-1         crtc=(null)         fb=0         crtc-pos=0x0+0+0         src-pos=0.000000x0.000000+0.000000+0.000000         rotation=1         normalized-zpos=0         color-encoding=ITU-R BT.601 YCbCr         color-range=YCbCr limited range         color_mgmt_changed=0 crtc[36]: crtc-0         enable=1         active=1         self_refresh_active=0         planes_changed=1         mode_changed=0         active_changed=0         connectors_changed=0         color_mgmt_changed=0         plane_mask=1         connector_mask=1         encoder_mask=1         mode: "640x480": 60 25175 640 656 752 800 480 490 492 525 0x48 0xa connector[38]: DP-1         crtc=crtc-0         self_refresh_aware=0         interlace_allowed=0         ycbcr_420_allowed=0         max_requested_bpc=0         colorspace=Default Regards, Nirmoy > I'm asking because the DP code always seemed fragile and there seem to > be devices that have both ports, DP and VGA, with no way of detecting > VGA. > > Best regards > Thomas > >> *From: *Thomas Zimmermann >> *Date: *Tuesday, September 23, 2025 at 10:35 AM >> *To: *Carol Soto , Nirmoy Das , >> KuoHsiang Chou >> *Cc: *dri-devel@lists.freedesktop.org >> , Matt Ochs >> *Subject: *Re: ast "WARN_ON(!__ast_dp_wait_enable("ast, enabled)) on >> reboot >> >> External email: Use caution opening links or attachments >> >> >> Hi >> >> Am 23.09.25 um 17:31 schrieb Carol Soto: >> > >> > I think this call was failing in this system for 6.8 kernel. The >> > difference is that now is a WARN_ON so we see the stack trace at >> > reboot with 6.14 and above kernels. >> > >> >> OK. Just to clarify: your system does use an Aspeed DisplayPort? There >> are also systems with VGA port. >> >> Best regards >> Thomas >> >> > Carol >> > >> > *From: *Thomas Zimmermann >> > *Date: *Tuesday, September 23, 2025 at 4:41 AM >> > *To: *Nirmoy Das , KuoHsiang Chou >> > >> > *Cc: *dri-devel@lists.freedesktop.org >> > , Carol Soto , Matt >> > Ochs >> > *Subject: *Re: ast "WARN_ON(!__ast_dp_wait_enable("ast, enabled)) on >> > reboot >> > >> > External email: Use caution opening links or attachments >> > >> > >> > Hi >> > >> > Am 23.09.25 um 11:25 schrieb Nirmoy Das: >> > > >> > > On 23.09.25 11:15, Thomas Zimmermann wrote: >> > >> Hi >> > >> >> > >> Am 23.09.25 um 10:34 schrieb Nirmoy Das: >> > >>> >> > >>> Hi Thomas and KuoHsiang >> > >>> >> > >>> >> > >>> (Not sure if there is separate portal to report AST issues. Let me >> > >>> know if there is one) >> > >>> >> > >>> We are observing the following trace on every reboot. I tried >> > >>> increasing the timeout value but that did not resolve the issue. >> > >>> >> > >>> I tried to read AST_IO_VGACRI(0xdf) and AST_IO_VGACRI(0xe3) which >> > >>> returns a value of 0xff. I wonder if >> > >>> >> > >>> the device is accessible at pci_device_shutdown(). >> > >>> >> > >>> I have attached the lspci output for your review.  Please let me >> > >>> know if you have some ideas how to debug/fix this. >> > >>> >> > >> >> > >> Is that a new problem? I occasionally refactor parts of the driver. >> > >> It could happen that an older version works? >> > > >> > > >> > > We saw this on 6.14 and 6.16 so I think it is not a new issue. >> Should >> > > we try out more older kernel? >> > >> > If you can. The DP code got added in v5.19 by commit 594e9c04b586 >> > ("drm/ast: Create the driver for ASPEED proprietory Display-Port"). >> > >> > Best regards >> > Thomas >> > >> > > >> > > >> > > Regards, >> > > >> > > Nirmoy >> > > >> > >> >> > >> Best regards >> > >> Thomas >> > >> >> > >>> [ 196.248014] ast 0008:02:00.0: [drm] >> > >>> drm_WARN_ON(!__ast_dp_wait_enable(ast, enabled)) [ 196.248045] >> > >>> WARNING: CPU: 76 PID: 1 at drivers/gpu/drm/ast/ast_dp.c:282 >> > >>> ast_dp_set_enable+0x124/0x158 [ast] [ 196.277550] Modules >> linked in: >> > >>> bcache qrtr cfg80211 binfmt_misc cdc_subset ast dax_hmem >> > >>> drm_shmem_helper cxl_acpi drm_client_lib cxl_port i2c_algo_bit >> > >>> cxl_core ipmi_ssif drm_kms_helper uio_pdrv_genirq uio >> coresight_trbe >> > >>> arm_spe_pmu arm_cspmu_module arm_smmuv3_pmu spi_nor mtd >> > >>> coresight_funnel acpi_power_meter acpi_ipmi coresight_etm4x >> > >>> coresight ipmi_msghandler dm_multipath efi_pstore drm nfnetlink >> > >>> ip_tables x_tables autofs4 overlay isofs nls_iso8859_1 raid10 >> > >>> raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx >> > >>> xor xor_neon raid6_pq raid1 raid0 linear mlx5_ib ib_uverbs ib_core >> > >>> mlx5_core ghash_ce sm4_ce_cipher sm4 sm3_ce mlxfw sha3_ce psample >> > >>> i2c_smbus sha512_ce nvme tls sha1_ce arm_smccc_trng nvme_core >> > >>> pci_hyperv_intf spi_tegra210_quad dax_pmem i2c_tegra cdc_ether >> > >>> usbnet aes_neon_bs aes_neon_blk aes_ce_blk aes_ce_cipher [last >> > >>> unloaded: ipmi_devintf] [ 196.355667] CPU: 76 UID: 0 PID: 1 Comm: >> > >>> shutdown Tainted: G W 6.16.4-dev-main-nvidia-pset-linux-6-generic >> > >>> #16+f4490439 PREEMPT(none) [ 196.369453] Tainted: [W]=WARN [ >> > >>> 196.372481] Hardware name: NVIDIA Grace CPU P5041/P3880, BIOS >> > >>> FF.04.00 20250422 [ 196.379955] pstate: 63400009 (nZCv daif +PAN >> > >>> -UAO +TCO +DIT -SSBS BTYPE=--) [ 196.387073] pc : >> > >>> ast_dp_set_enable+0x124/0x158 [ast] [ 196.392148] lr : >> > >>> ast_dp_set_enable+0x124/0x158 [ast] [ 196.397221] sp : >> > >>> ffff80008049b930 [ 196.400604] x29: ffff80008049b930 x28: >> > >>> ffffa507dbec1b98 x27: ffff0000acb337b8 [ 196.407901] x26: >> > >>> 0000000000000000 x25: ffff1003985d2e00 x24: ffffa507dbdc45b8 [ >> > >>> 196.415197] x23: 0000000000000000 x22: 0000000000418958 x21: >> > >>> 00000000ffffffdf [ 196.422495] x20: ffff100008bac0c8 x19: >> > >>> 0000000000000000 x18: 000000000000004c [ 196.429790] x17: >> > >>> ffff100008b5f200 x16: ffffa508522b5ce8 x15: 0000000000000000 [ >> > >>> 196.437087] x14: 0000000000000000 x13: 2d2d2d2d2d2d2d2d x12: >> > >>> 2d2d2d2d5d206572 [ 196.444384] x11: 656820747563205b x10: >> > >>> 0000000000000020 x9 : ffffa508523621cc [ 196.451681] x8 : >> > >>> 00000000ffffffff x7 : 0000000000000030 x6 : 0000000005000000 [ >> > >>> 196.458976] x5 : 000000000000004d x4 : 00000000000000c0 x3 : >> > >>> 0000000000000003 [ 196.466271] x2 : 0000000000000000 x1 : >> > >>> 0000000000000000 x0 : ffff000081356040 [ 196.473566] Call trace: [ >> > >>> 196.476061] ast_dp_set_enable+0x124/0x158 [ast] (P) [ 196.481135] >> > >>> ast_astdp_encoder_helper_atomic_disable+0x28/0x90 [ast] [ >> > >>> 196.487630] disable_outputs+0x11c/0x3c8 [drm_kms_helper] [ >> > >>> 196.493160] drm_atomic_helper_commit_tail+0x2c/0xb0 >> [drm_kms_helper] >> > >>> [ 196.499753] ast_mode_config_helper_atomic_commit_tail+0x34/0x58 >> > >>> [ast] [ 196.506427] commit_tail+0xd8/0x220 [drm_kms_helper] [ >> > >>> 196.511503] drm_atomic_helper_commit+0x174/0x190 >> [drm_kms_helper] [ >> > >>> 196.517824] drm_atomic_commit+0x94/0xe0 [drm] [ 196.522392] >> > >>> drm_atomic_helper_disable_all+0x204/0x220 [drm_kms_helper] [ >> > >>> 196.529158] drm_atomic_helper_shutdown+0x90/0x158 >> [drm_kms_helper] [ >> > >>> 196.535567] ast_pci_shutdown+0x1c/0x30 [ast] [ 196.540020] >> > >>> pci_device_shutdown+0x3c/0xa8 [ 196.544216] >> > >>> device_shutdown+0x140/0x2b0 [ 196.548229] >> kernel_restart+0x4c/0xb8 [ >> > >>> 196.551974] __do_sys_reboot+0x148/0x260 [ 196.555979] >> > >>> __arm64_sys_reboot+0x2c/0x40 [ 196.560074] >> invoke_syscall+0x70/0x100 >> > >>> [ 196.563907] el0_svc_common.constprop.0+0x48/0xf8 [ 196.568712] >> > >>> do_el0_svc+0x28/0x40 [ 196.572097] el0_svc+0x34/0xd8 [ 196.575220] >> > >>> el0t_64_sync_handler+0x144/0x168 [ 196.579670] >> > >>> el0t_64_sync+0x1b0/0x1b8 [ 196.583411] ---[ end trace >> > >>> 0000000000000000 ]--- [ 196.656701] reboot: Restarting system >> > >>> >> > >>> lspci: >> > >>> >> > >>> 0008:03:00.0 PCI bridge: ASPEED Technology, Inc. AST1150 >> PCI-to-PCI >> > >>> Bridge (rev 06) (prog-if 00 [Normal decode]) Subsystem: ASPEED >> > >>> Technology, Inc. AST1150 PCI-to-PCI Bridge Physical Slot: 2-1 >> Flags: >> > >>> bus master, fast devsel, latency 0, NUMA node 0, IOMMU group 24 >> Bus: >> > >>> primary=03, secondary=04, subordinate=04, sec-latency=0 I/O behind >> > >>> bridge: 40000-40fff [size=4K] [16-bit] Memory behind bridge: >> > >>> 40000000-410fffff [size=17M] [32-bit] Prefetchable memory behind >> > >>> bridge: [disabled] [64-bit] Capabilities: [40] Power Management >> > >>> version 3 Capabilities: [68] Express PCI-Express to PCI/PCI-X >> > >>> Bridge, MSI 00 Capabilities: [b0] Subsystem: ASPEED Technology, >> Inc. >> > >>> AST1150 PCI-to-PCI Bridge Capabilities: [e0] Vendor Specific >> > >>> Information: Len=20 Capabilities: [100] Device Serial Number >> > >>> 00-80-5e-00-00-10-0b-b0 Capabilities: [10c] Secondary PCI Express >> > >>> Capabilities: [150] Virtual Channel Capabilities: [1e0] Vendor >> > >>> Specific Information: ID=0001 Rev=2 Len=010 Capabilities: >> [1f0] >> > >>> Advanced Error Reporting 0008:04:00.0 VGA compatible controller: >> > >>> ASPEED Technology, Inc. ASPEED Graphics Family (rev 52) >> (prog-if 00 >> > >>> [VGA controller]) DeviceName: Embedded Video Controller Subsystem: >> > >>> ASPEED Technology, Inc. ASPEED Graphics Family !!! Unknown header >> > >>> type 7f Memory at 650040000000 (32-bit, non-prefetchable) >> [size=16M] >> > >>> Memory at 650041000000 (32-bit, non-prefetchable) [size=256K] I/O >> > >>> ports at 40000 [size=128] Kernel driver in use: ast Kernel >> > modules: ast >> > >>> >> > >> >> > >> > -- >> > -- >> > Thomas Zimmermann >> > Graphics Driver Developer >> > SUSE Software Solutions Germany GmbH >> > Frankenstrasse 146, 90461 Nuernberg, Germany >> > GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman >> > HRB 36809 (AG Nuernberg) >> > >> >> -- >> -- >> Thomas Zimmermann >> Graphics Driver Developer >> SUSE Software Solutions Germany GmbH >> Frankenstrasse 146, 90461 Nuernberg, Germany >> GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman >> HRB 36809 (AG Nuernberg) >> >