| Message ID | 20211215141727.4901-4-yann.gautier@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | mmc: mmci: updates for STM32MP13 | expand |
On 12/15/21 15:17, Yann Gautier wrote: > During test campaign, and especially after several unbind/bind sequences, > it has been seen that the SD-card on SDMMC1 thread could freeze. > The freeze always appear on a CMD23 following a CMD19. > Checking SDMMC internal registers shows that the tuning command (CMD19) > has failed. > The freeze is then due to the delay block involved in the tuning sequence. > To correct this, clear the delay block register DLYB_CR register after > the tuning commands. > > Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com> > Signed-off-by: Yann Gautier <yann.gautier@foss.st.com> > --- > drivers/mmc/host/mmci_stm32_sdmmc.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/mmc/host/mmci_stm32_sdmmc.c b/drivers/mmc/host/mmci_stm32_sdmmc.c > index fdaa11f92fe6..a75d3dd34d18 100644 > --- a/drivers/mmc/host/mmci_stm32_sdmmc.c > +++ b/drivers/mmc/host/mmci_stm32_sdmmc.c > @@ -441,6 +441,8 @@ static int sdmmc_dlyb_phase_tuning(struct mmci_host *host, u32 opcode) > return -EINVAL; > } > > + writel_relaxed(0, dlyb->base + DLYB_CR); > + > phase = end_of_len - max_len / 2; > sdmmc_dlyb_set_cfgr(dlyb, dlyb->unit, phase, false); Shouldn't this have a Fixes: tag and be CC stable ? This seems like a bugfix, no ?
On 12/16/21 10:13 AM, Marek Vasut wrote: > On 12/15/21 15:17, Yann Gautier wrote: >> During test campaign, and especially after several unbind/bind sequences, >> it has been seen that the SD-card on SDMMC1 thread could freeze. >> The freeze always appear on a CMD23 following a CMD19. >> Checking SDMMC internal registers shows that the tuning command (CMD19) >> has failed. >> The freeze is then due to the delay block involved in the tuning >> sequence. >> To correct this, clear the delay block register DLYB_CR register after >> the tuning commands. >> >> Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com> >> Signed-off-by: Yann Gautier <yann.gautier@foss.st.com> >> --- >> drivers/mmc/host/mmci_stm32_sdmmc.c | 2 ++ >> 1 file changed, 2 insertions(+) >> >> diff --git a/drivers/mmc/host/mmci_stm32_sdmmc.c >> b/drivers/mmc/host/mmci_stm32_sdmmc.c >> index fdaa11f92fe6..a75d3dd34d18 100644 >> --- a/drivers/mmc/host/mmci_stm32_sdmmc.c >> +++ b/drivers/mmc/host/mmci_stm32_sdmmc.c >> @@ -441,6 +441,8 @@ static int sdmmc_dlyb_phase_tuning(struct >> mmci_host *host, u32 opcode) >> return -EINVAL; >> } >> + writel_relaxed(0, dlyb->base + DLYB_CR); >> + >> phase = end_of_len - max_len / 2; >> sdmmc_dlyb_set_cfgr(dlyb, dlyb->unit, phase, false); > > Shouldn't this have a Fixes: tag and be CC stable ? > This seems like a bugfix, no ? Hi Marek, You're right, I should have added: Fixes: 1103f807a3b9 ("mmc: mmci_sdmmc: Add execute tuning with delay block") Ulf, could you manage that, or should I push a new version? Best regards, Yann
On Thu, 16 Dec 2021 at 10:49, Yann Gautier <yann.gautier@foss.st.com> wrote: > > On 12/16/21 10:13 AM, Marek Vasut wrote: > > On 12/15/21 15:17, Yann Gautier wrote: > >> During test campaign, and especially after several unbind/bind sequences, > >> it has been seen that the SD-card on SDMMC1 thread could freeze. > >> The freeze always appear on a CMD23 following a CMD19. > >> Checking SDMMC internal registers shows that the tuning command (CMD19) > >> has failed. > >> The freeze is then due to the delay block involved in the tuning > >> sequence. > >> To correct this, clear the delay block register DLYB_CR register after > >> the tuning commands. > >> > >> Signed-off-by: Christophe Kerello <christophe.kerello@foss.st.com> > >> Signed-off-by: Yann Gautier <yann.gautier@foss.st.com> > >> --- > >> drivers/mmc/host/mmci_stm32_sdmmc.c | 2 ++ > >> 1 file changed, 2 insertions(+) > >> > >> diff --git a/drivers/mmc/host/mmci_stm32_sdmmc.c > >> b/drivers/mmc/host/mmci_stm32_sdmmc.c > >> index fdaa11f92fe6..a75d3dd34d18 100644 > >> --- a/drivers/mmc/host/mmci_stm32_sdmmc.c > >> +++ b/drivers/mmc/host/mmci_stm32_sdmmc.c > >> @@ -441,6 +441,8 @@ static int sdmmc_dlyb_phase_tuning(struct > >> mmci_host *host, u32 opcode) > >> return -EINVAL; > >> } > >> + writel_relaxed(0, dlyb->base + DLYB_CR); > >> + > >> phase = end_of_len - max_len / 2; > >> sdmmc_dlyb_set_cfgr(dlyb, dlyb->unit, phase, false); > > > > Shouldn't this have a Fixes: tag and be CC stable ? > > This seems like a bugfix, no ? > > Hi Marek, > > You're right, I should have added: > Fixes: 1103f807a3b9 ("mmc: mmci_sdmmc: Add execute tuning with delay block") > > Ulf, could you manage that, or should I push a new version? Patch applied for fixes and by adding a stable tag too, thanks! Kind regards Uffe
diff --git a/drivers/mmc/host/mmci_stm32_sdmmc.c b/drivers/mmc/host/mmci_stm32_sdmmc.c index fdaa11f92fe6..a75d3dd34d18 100644 --- a/drivers/mmc/host/mmci_stm32_sdmmc.c +++ b/drivers/mmc/host/mmci_stm32_sdmmc.c @@ -441,6 +441,8 @@ static int sdmmc_dlyb_phase_tuning(struct mmci_host *host, u32 opcode) return -EINVAL; } + writel_relaxed(0, dlyb->base + DLYB_CR); + phase = end_of_len - max_len / 2; sdmmc_dlyb_set_cfgr(dlyb, dlyb->unit, phase, false);