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SubjectRe: [PATCH v3 4/7] mmc: sdhci: Add quirk for disabling DTO during erase command
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Hi Adrian,


On 13/12/19 3:10 pm, Adrian Hunter wrote:
> On 10/12/19 11:51 am, Faiz Abbas wrote:
>> Some controllers might prematurely issue a data timeout during an erase
>> command. Add a quirk to disable the interrupt when an erase command is
>> issued.
>>
>> Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
>> ---
>> drivers/mmc/host/sdhci.c | 5 +++++
>> drivers/mmc/host/sdhci.h | 2 ++
>> 2 files changed, 7 insertions(+)
>>
>> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
>> index 6f3d4991bee1..b8934c50b9c4 100644
>> --- a/drivers/mmc/host/sdhci.c
>> +++ b/drivers/mmc/host/sdhci.c
>> @@ -1532,6 +1532,11 @@ void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
>> /* Initially, a command has no error */
>> cmd->error = 0;
>>
>> + if (cmd->opcode == MMC_ERASE &&
>> + (host->quirks2 & SDHCI_QUIRK2_DISABLE_DTO_FOR_ERASE)) {
>> + sdhci_set_data_timeout_irq(host, false);
>> + }
>
> If you factor out __sdhci_set_timeout() like below then
> you could implement ->set_timeout() to do this.
>
> diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
> index ad6d2f93aa0b..389e3239eadc 100644
> --- a/drivers/mmc/host/sdhci.c
> +++ b/drivers/mmc/host/sdhci.c
> @@ -1002,27 +1002,28 @@ static void sdhci_set_data_timeout_irq(struct sdhci_host *host, bool enable)
> sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE);
> }
>
> -static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
> +void __sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
> {
> - u8 count;
> -
> - if (host->ops->set_timeout) {
> - host->ops->set_timeout(host, cmd);
> - } else {
> - bool too_big = false;
> -
> - count = sdhci_calc_timeout(host, cmd, &too_big);
> + bool too_big = false;
> + u8 count = sdhci_calc_timeout(host, cmd, &too_big);
> +
> + if (too_big && host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) {
> + sdhci_calc_sw_timeout(host, cmd);
> + sdhci_set_data_timeout_irq(host, false);
> + } else if (!(host->ier & SDHCI_INT_DATA_TIMEOUT)) {
> + sdhci_set_data_timeout_irq(host, true);
> + }
>
> - if (too_big &&
> - host->quirks2 & SDHCI_QUIRK2_DISABLE_HW_TIMEOUT) {
> - sdhci_calc_sw_timeout(host, cmd);
> - sdhci_set_data_timeout_irq(host, false);
> - } else if (!(host->ier & SDHCI_INT_DATA_TIMEOUT)) {
> - sdhci_set_data_timeout_irq(host, true);
> - }
> + sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
> +}
> +EXPORT_SYMBOL_GPL(__sdhci_set_timeout);
>
> - sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL);
> - }
> +static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
> +{
> + if (host->ops->set_timeout)
> + host->ops->set_timeout(host, cmd);
> + else
> + __sdhci_set_timeout(host, cmd);
> }

Ok. I'll add the refactoring as a separate patch.

Thanks,
Faiz

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