Date: Fri, 30 Sep 2022 21:19:12 +0200 From: =?utf-8?Q?Klaus_K=C3=BCchemann?= <maciphone2@googlemail.com> To: Mark Millard <marklmi@yahoo.com>, bob prohaska <fbsd@www.zefox.net>, freebsd-arm@freebsd.org Subject: Re: u-boot debug, was: Re: U-boot on RPI3, sees disk but won't boot it Message-ID: <CB60B88E-982B-4EFE-9E40-9CD0C688E64A@googlemail.com> In-Reply-To: <8CE490A2-B512-4170-95BC-D0584F2B254A@yahoo.com> References: <A8C2BA4E-4520-4B34-9614-DDC4D8BEB097@yahoo.com> <6AA65AE6-41F1-405F-A592-7D641EA4C9CF@yahoo.com> <E3A1C678-8C47-4283-9F9F-4C9011DB8A2B@yahoo.com> <20220929054120.GA77803@www.zefox.net> <D7A62820-4928-49F0-8387-C1E6D998B121@yahoo.com> <ABFBD0E6-8A9B-4C99-84DF-BF398F23678A@yahoo.com> <20220929151926.GA80020@www.zefox.net> <F316420B-C7AF-4131-9734-06117FFE212D@yahoo.com> <20220929170927.GB80020@www.zefox.net> <6C5019EC-B4A8-448F-9A85-4A98BC46F7DD@yahoo.com> <20220930002742.GA81169@www.zefox.net> <7A431698-1A8C-44BA-AFA2-EF5BAA69574F@googlemail.com> <924ED901-F9EB-4CFE-8376-1C2653FB6EBE@yahoo.com> <97AB11F6-2F4D-4026-8A96-50FC68B6EF8C@googlemail.com> <ED81813C-6F25-4751-BBCA-BC711684B219@yahoo.com> <5F180C78-BC07-4605-A042-0BEC8A6FD185@googlemail.com> <8CE490A2-B512-4170-95BC-D0584F2B254A@yahoo.com>
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> Am 30.09.2022 um 20:36 schrieb Mark Millard <marklmi@yahoo.com>: > ... > I've little clue what would interfere with its > operation in this specific way. =E2=80=A6also no clue but: Some months/years ago I filed a bug report(RockChip) with a similar = issue(pcie/M2.nvme), where the nvme was sometimes detected, but mostly not detected(by = u-boot)=E2=80=A6 I closed the bug report after the manufacturer posted that this was a = hardware-issue, caused by an onboard regulator chip , which was then replaced in the = next hardware revision. the question now is if we can workaround those issues by port resets or = timeout-hacks inside u-boot=E2=80=A6 if we think it=E2=80=99s worth the = effort=20 for this device.. USB expert help would be very appreciated ;-) Regards=20 Klaus
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