On Sat, 2025-02-22 at 10:45 +0100, Krzysztof Kozlowski wrote: > External email : Please do not click links or open attachments until > you have verified the sender or the content. > > > On Fri, Feb 21, 2025 at 03:48:30PM +0800, Friday Yang wrote: > > Based on tag: next-20250220, linux-next/master > > > > On the MediaTek MT8188 SoC platform, we encountered power-off > > failures > > and SMI bus hang issues during camera stress tests. The issue > > arises > > because bus glitches are sometimes produced when MTCMOS powers on > > or > > off. While this is fairly normal, the software must handle these > > glitches to avoid mistaking them for transaction signals. What's > > more, this issue emerged only after the initial upstreaming of SMI > > driver. > > > > The software solutions can be summarized as follows: > > > > 1. Use CLAMP to disable the SMI sub-common port after turning off > > the > > LARB CG and before turning off the LARB MTCMOS. > > 2. Use CLAMP to disable/enable the SMI sub-common port. > > 3. Implement an AXI reset for SMI LARBs. > > > > Changes v4: > > - Use 'devm_reset_control_get_optional_exclusive' instead of > > 'devm_reset_control_get'. > > > > v3: > > https://lore.kernel.org/lkml/20250121064934.13482-2- > > That's not a valid link. Fix your email client. > Sorry for the inconvenience. The Web link is quite long, so I have split it into two lines. Please copy the entire link and paste it into the browser, it sholuld work. > Best regards, > Krzysztof >
