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X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Jun 2023 16:14:11.9002 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Vp3EuYZs+fPb8Ya0tMdPeGkdYBwOKvnb8d3d/800ibn+1LdOYObypVXp3iyE5PBWX8vN5v2HZSVBWftIzl4jfqzYFunU/6r4RMhBVgpmQeo= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR11MB7012 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Fri, Jun 02, 2023 at 06:05:05PM +0200, Henning Schild wrote: > This fixes the following problem which was seen on a Tigerlake running > Debian 10 with a 5.10 kernel. > > [ 111.408631] Missing case (val == 65535) > [ 111.408698] WARNING: CPU: 2 PID: 446 at drivers/gpu/drm/i915/intel_dram.c:95 skl_dram_get_dimm_info+0x72/0x1a0 [i915] > [ 111.408699] Modules linked in: intel_powerclamp coretemp i915(+) joydev kvm_intel kvm hid_generic irqbypass crc32_pclmul snd_hda_intel ghash_clmulni_intel snd_intel_dspcfg snd_hda_codec aesni_intel glue_helper crypto_simd cryptd snd_hwdep snd_hda_core drm_kms_helper uas snd_pcm usb_storage intel_cstate mei_wdt mei_hdcp snd_timer scsi_mod usbhid hid cec wdat_wdt snd mei_me evdev mei intel_uncore rc_core watchdog pcspkr soundcore video acpi_pad acpi_tad button drm fuse configfs loop(+) efi_pstore efivarfs ip_tables x_tables autofs4 ext4 crc32c_generic crc16 mbcache jbd2 dm_mod xhci_pci xhci_hcd marvell dwmac_intel stmmac igb e1000e usbcore nvme nvme_core pcs_xpcs phylink libphy i2c_algo_bit t10_pi dca crc_t10dif crct10dif_generic intel_lpss_pci ptp vmd intel_lpss i2c_i801 crct10dif_pclmul pps_core crct10dif_common idma64 usb_common crc32c_intel i2c_smbus > [ 111.408755] CPU: 2 PID: 446 Comm: (udev-worker) Not tainted 5.10.180 #2 > [ 111.408756] Hardware name: SIEMENS AG SIMATIC IPC427G/no information, BIOS T29.01.02.D3.0 10/11/2022 > [ 111.408797] RIP: 0010:skl_dram_get_dimm_info+0x72/0x1a0 [i915] > [ 111.408799] Code: 01 00 00 0f 84 31 01 00 00 66 3d 00 01 0f 84 27 01 00 00 41 0f b7 d0 48 c7 c6 ba 81 7c c1 48 c7 c7 be 81 7c c1 e8 d2 75 89 fa <0f> 0b c6 45 01 00 44 0f b6 4d 00 31 f6 b9 01 00 00 00 c1 fb 09 83 > [ 111.408801] RSP: 0018:ffffa23a40b53b10 EFLAGS: 00010286 > [ 111.408802] RAX: 0000000000000000 RBX: 000000000000ffff RCX: 0000000000000027 > [ 111.408803] RDX: ffff947b278a0908 RSI: 0000000000000001 RDI: ffff947b278a0900 > [ 111.408804] RBP: ffffa23a40b53b78 R08: 0000000000000000 R09: ffffa23a40b53920 > [ 111.408805] R10: ffffa23a40b53918 R11: 0000000000000003 R12: 0000000000000000 > [ 111.408806] R13: 000000000000004c R14: ffff9479b1a00000 R15: ffff9479b1a00000 > [ 111.408808] FS: 00007ff9626478c0(0000) GS:ffff947b27880000(0000) knlGS:0000000000000000 > [ 111.408809] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 111.408810] CR2: 0000555753cbf15c CR3: 0000000108432002 CR4: 0000000000770ee0 > [ 111.408810] PKRU: 55555554 > [ 111.408811] Call Trace: > [ 111.408854] skl_dram_get_channel_info+0x24/0x160 [i915] > [ 111.408892] intel_dram_detect+0xef/0x630 [i915] > [ 111.408931] i915_driver_probe+0xb18/0xc40 [i915] > [ 111.408969] ? i915_pci_probe+0x3f/0x160 [i915] > [ 111.408973] local_pci_probe+0x3b/0x80 > [ 111.408975] pci_device_probe+0xfc/0x1b0 > [ 111.408979] really_probe+0x26e/0x460 > [ 111.408981] driver_probe_device+0xb4/0x100 > [ 111.408983] device_driver_attach+0xa9/0xb0 > [ 111.408984] ? device_driver_attach+0xb0/0xb0 > [ 111.408985] __driver_attach+0xa1/0x140 > [ 111.408987] ? device_driver_attach+0xb0/0xb0 > [ 111.408989] bus_for_each_dev+0x84/0xd0 > [ 111.408991] bus_add_driver+0x13e/0x200 > [ 111.408993] driver_register+0x89/0xe0 > [ 111.409036] i915_init+0x60/0x75 [i915] > [ 111.409038] ? 0xffffffffc18b8000 > [ 111.409041] do_one_initcall+0x56/0x1f0 > [ 111.409044] do_init_module+0x4a/0x240 > [ 111.409047] __do_sys_finit_module+0xaa/0x110 > [ 111.409050] do_syscall_64+0x30/0x40 > [ 111.409053] entry_SYSCALL_64_after_hwframe+0x61/0xc6 > [ 111.409054] RIP: 0033:0x7ff962d534f9 > [ 111.409056] Code: 08 89 e8 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d7 08 0d 00 f7 d8 64 89 01 48 > [ 111.409057] RSP: 002b:00007fff57caf5d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 > [ 111.409058] RAX: ffffffffffffffda RBX: 0000555753cad120 RCX: 00007ff962d534f9 > [ 111.409059] RDX: 0000000000000000 RSI: 00007ff962ee6efd RDI: 0000000000000010 > [ 111.409060] RBP: 00007ff962ee6efd R08: 0000000000000000 R09: 0000555753c7a320 > [ 111.409061] R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000020000 > [ 111.409062] R13: 0000000000000000 R14: 0000555753ca4f30 R15: 0000555752d40e4f > [ 111.409064] ---[ end trace 2da6ec0bd6f7c3a1 ]--- > > > José Roberto de Souza (1): > drm/i915/gen11+: Only load DRAM information from pcode > > Matt Roper (1): > drm/i915/dg1: Wait for pcode/uncore handshake at startup This second patch should only be needed for discrete GPUs (none of which are fully enabled on a 5.10 kernel). Are you seeing it cause a change in behavior on an integrated TGL platform? Matt > > drivers/gpu/drm/i915/display/intel_bw.c | 80 +++--------------------- > drivers/gpu/drm/i915/i915_drv.c | 4 ++ > drivers/gpu/drm/i915/i915_drv.h | 1 + > drivers/gpu/drm/i915/i915_reg.h | 3 + > drivers/gpu/drm/i915/intel_dram.c | 82 ++++++++++++++++++++++++- > drivers/gpu/drm/i915/intel_sideband.c | 15 +++++ > drivers/gpu/drm/i915/intel_sideband.h | 2 + > 7 files changed, 114 insertions(+), 73 deletions(-) > > -- > 2.39.3 > > -- Matt Roper Graphics Software Engineer Linux GPU Platform Enablement Intel Corporation