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=?utf-8?B?SGNoamUrNlJkczlWWTlIVDhRK0E0WjhTWTdlODdjelJLOFVCUU03UT09?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 72c1320f-ce5e-4ba7-a32a-08df127defeb X-MS-Exchange-CrossTenant-AuthSource: PH8PR12MB6914.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Sep 2026 16:33:41.6688 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: DkAbGG874SpGVY6ig2XbtbbG0vHtjEAI2oQymMV+c/ks6dqzyJLHI0vn68LQSF4DIpUF0Zh+RMZo38XDdPNvOQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8877 ++ AMD guys On 9/14/26 11:18, Niklas Cassel wrote: > Hello Mario, > > > Perhaps you, or someone at AMD could help us with this: > https://bugzilla.kernel.org/show_bug.cgi?id=221986 > > > Is seems that a user is having issues with: > > 12:00.0 SATA controller [0106]: Advanced Micro Devices, Inc. > [AMD] 600 Series Chipset SATA Controller [1022:43f6] (rev 01) > > together with: > > Samsung SSD 870 QVO 8TB > > > when being issued command STANDBY IMMEDIATE (E0h) during system suspend. > > The command never receives a completion. > > > It seems that this is only a problem when "med_power_with_dipm" is enabled. > > Apparently, when using "max_performance" the drives do complete the > STANDBY IMMEDIATE (E0h) command successfully. > > From looking at the AHCI specification, the HBA should automatically wake > the drive when a new command is issued via PxCI. > > > > The user did point out that these Samsung drives are quirked with: > ATA_QUIRK_NO_LPM_ON_ATI. > > See commit: > f2aac4c73c99 ("ata: libata-core: Add ATA_QUIRK_NO_LPM_ON_ATI for certain > Samsung SSDs"). > > From earlier reports, these Samsung drives appear to handle LPM perfectly > fine on Intel-based AHCI controllers. > > > This LPM quirk is only for the old ATI AHCI controllers, because it was > assumed that, just like the ATI specific quirk that disables NCQ: > ATA_QUIRK_NO_NCQ_ON_ATI, that the AMD AHCI controllers were unaffected, > see e.g. 7a8526a5cd51 ("libata: Add ATA_HORKAGE_NO_NCQ_ON_ATI for Samsung > 860 and 870 SSD."): > > After verifying the chipset from the user reports, the issue appears > on AMD/ATI SB7x0/SB8x0/SB9x0 SATA Controllers and does not appear on > recent AMD SATA adapters. > > > I guess it is possible that while the AMD AHCI controllers have fixed the > NCQ problem with Samsung SSDs (that was troubling ATI AHCI), perhaps the > AMD AHCI controllers still have the LPM issues with Samsung SSDS that was > troubling ATI AHCI controllers. > > > It this anything anyone at AMD is aware of? > > From the users report, he is using the latest available firmware from Samsung. > > Considering that Samsung SSD work fine with LPM on Intel, I'm considering > the users suggestion, to simply rename the ATA_QUIRK_NO_LPM_ON_ATI to > ATA_QUIRK_NO_LPM_ON_ATI_AND_AMD and modify the quirk to extend to AMD AHCI > controllers as well. > I'm not aware of anything like this. Let's see if Shyam or Basavaraj have. I think that sounds like a pragmatic approach. We can always back it out later if this ends up being root caused down to a different conclusion.