> -----Original Message----- > From: Ulf Hansson [mailto:ulf.hansson@xxxxxxxxxx] > Sent: Tuesday, December 01, 2015 8:45 PM > To: Chen Haibo-B51421 > Cc: nsanders@xxxxxxxxxxxx; linux-mmc@xxxxxxxxxxxxxxx > Subject: Re: eMMC tuning fail issue > > On 1 December 2015 at 09:41, Chen Bough <Haibo.Chen@xxxxxxxxxxxxx> wrote: > > Hi, > > > > After > > commit 197160d52e859575ff0ad1afd674ab2a825b9f83 > > Author: Nick Sanders <nsanders@xxxxxxxxxxxx> > > Date: Tue May 6 18:52:38 2014 -0700 > > > > mmc: sdhci: remove mdelay in eMMC tuning > > > > > > I find Micron eMMC HS200 and HS400 can't pass tuning on i.MX7D platform, > here is the log: > > > > [ 2.835581] sdhci: Tuning procedure failed, falling back to fixed > sampling clock > > [ 2.843071] mmc1: tuning execution failed > > [ 2.847104] mmc1: error -5 whilst initialising MMC card > > > > When I revert this commit, issue gone. > > Thanks for reporting the problem! > > There's been a lot of changes regarding tuning since then, both to sdhci > and the mmc core. So before I consider a revert for that patch, can you > share on what baseline you are on!? I based on the latest Linux-next, v4.4-rc2. Best regards Haibo Chen > > [...] > > Kind regards > Uffe ��.n��������+%������w��{.n�����{��i��)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
