On 11/30/2021 4:57 PM, Hans de Goede wrote: > Hi, > > On 11/30/21 05:15, Fabrizio Bertocci wrote: >> On some AMD hardware laptops, the system fails communicating with the >> PMU when entering s2idle and the machine is battery powered. >> >> Hardware description: HP Pavilion Aero Laptop 13-be0097nr >> CPU: AMD Ryzen 7 5800U with Radeon Graphics >> GPU: 03:00.0 VGA compatible controller [0300]: Advanced Micro Devices, >> Inc. [AMD/ATI] Device [1002:1638] (rev c1) >> >> Detailed description of the problem (and investigation) here: >> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgitlab.freedesktop.org%2Fdrm%2Famd%2F-%2Fissues%2F1799&data=04%7C01%7Cshyam-sundar.s-k%40amd.com%7Ce8ed4219951f4df1dbe708d9b3f4761c%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637738684806355205%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=EwYxPgELsgQ2YpNQROFyptvt2Z0jQ0Yso8wptp6Dz4g%3D&reserved=0 >> >> Patch is a single line: reduce the polling delay in half, from 100uSec >> to 50uSec when waiting for a change in state from the PMC after a >> write command operation. >> >> Tested on kernel tree detached at tag 5.14 >> (7d2a07b769330c34b4deabeed939325c77a7ec2f) >> After changing the delay, I did not see a single failure on this >> machine (I have this fix for now more than one week and s2idle worked >> every single time on battery power). >> >> Signed-off-by: Fabrizio Bertocci <fabriziobertocci@xxxxxxxxx> > > Thank you for your patch. I've added a couple of AMD developers who > work on this driver to the Cc. > > AMD folks, can you review/ack this patch please? Looks good to me. Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@xxxxxxx> Thanks, Shyam
