Re: [PATCH V1 1/2] mmc: sdhci: Introduce new quirk to use reserved timeout

[sartgarg]

On 2020-05-18 18:20, Ulf Hansson wrote:
> On Mon, 18 May 2020 at 13:45, Adrian Hunter <adrian.hunter@xxxxxxxxx> 
> wrote:
> > On 18/05/20 12:39 pm, Ulf Hansson wrote:
> > > On Wed, 6 May 2020 at 15:53, Sarthak Garg <sartgarg@xxxxxxxxxxxxxx> wrote:
> > >>
> > >> Introduce a new quirk for letting vendor drivers to use reserved
> > >> timeout value (0xF) in timeout control register.
> > >>
> > >> Signed-off-by: Sahitya Tummala <stummala@xxxxxxxxxxxxxx>
> > >> Signed-off-by: Sarthak Garg <sartgarg@xxxxxxxxxxxxxx>
> > >> ---
> > >>  drivers/mmc/host/sdhci.c | 3 ++-
> > >>  drivers/mmc/host/sdhci.h | 5 +++++
> > >>  2 files changed, 7 insertions(+), 1 deletion(-)
> > >>
> > >> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> > >> index 1bb6b67..07528a9 100644
> > >> --- a/drivers/mmc/host/sdhci.c
> > >> +++ b/drivers/mmc/host/sdhci.c
> > >> @@ -967,7 +967,8 @@ static u8 sdhci_calc_timeout(struct sdhci_host *host, struct mmc_command *cmd,
> > >>         }
> > >>
> > >>         if (count >= 0xF) {
> > >> -               if (!(host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT))
> > >> +               if (!(host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) ||
> > >> +               !(host->quirks2 & SDHCI_QUIRK2_USE_RESERVED_MAX_TIMEOUT))
> > >
> > > I don't quite get how this can make your variant use 0xF rather than 0xE?
> > >
> > > To me it looks like an updated conditional check to print a debug message, no?
> >
> > Probably need to introduce host->max_timeout_count, set it to 0xE in
> > sdhci_alloc_host(), and change sdhci_calc_timeout() to use it in place 
> > of
> > all the 0xE and 0xF constants.
>
> Yep, that seems like a reasonable approach to me as well.
>
> [...]
>
> Kind regards
> Uffe

Resending the mail again as can't see my comment on the 
https://patchwork.kernel.org/ page.
Sorry for the mistake just want to update the logic as below.
-               count = 0xE;
+               if(!(host->quirks2 & 
SDHCI_QUIRK2_USE_RESERVED_MAX_TIMEOUT))
+                       count = 0xE;