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SubjectRe: [PATCH V1 1/2] mmc: sdhci: Introduce new quirk to use reserved timeout
On 2020-05-18 18:20, Ulf Hansson wrote:
> On Mon, 18 May 2020 at 13:45, Adrian Hunter <adrian.hunter@intel.com>
> wrote:
>>
>> On 18/05/20 12:39 pm, Ulf Hansson wrote:
>> > On Wed, 6 May 2020 at 15:53, Sarthak Garg <sartgarg@codeaurora.org> 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@codeaurora.org>
>> >> Signed-off-by: Sarthak Garg <sartgarg@codeaurora.org>
>> >> ---
>> >> 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;

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