From: Ulf Hansson <ulf.hansson@linaro.org>
To: Aapo Vienamo <avienamo@nvidia.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
linux-tegra@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] mmc: tegra: Implement periodic pad calibration
Date: Mon, 3 Sep 2018 08:14:21 +0200 [thread overview]
Message-ID: <CAPDyKFpVaxttnTZPPZFPn4yvQET_=WcA5TyW2rSbyVEeZOuFVw@mail.gmail.com> (raw)
In-Reply-To: <1534757013-4524-3-git-send-email-avienamo@nvidia.com>
On 20 August 2018 at 11:23, Aapo Vienamo <avienamo@nvidia.com> wrote:
> Rerun the pad calibration procedure before sdhci_request() if
> the 100 ms recalibration interval has been exceeded.
>
> Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
Applied for next, thanks!
Kind regards
Uffe
> ---
> drivers/mmc/host/sdhci-tegra.c | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index 94624ec..ef18a0c 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -30,6 +30,7 @@
> #include <linux/mmc/mmc.h>
> #include <linux/mmc/slot-gpio.h>
> #include <linux/gpio/consumer.h>
> +#include <linux/ktime.h>
>
> #include "sdhci-pltfm.h"
>
> @@ -122,6 +123,7 @@ struct sdhci_tegra {
> struct pinctrl_state *pinctrl_state_1v8;
>
> struct sdhci_tegra_autocal_offsets autocal_offsets;
> + ktime_t last_calib;
>
> u32 default_tap;
> u32 default_trim;
> @@ -533,6 +535,22 @@ static void tegra_sdhci_parse_pad_autocal_dt(struct sdhci_host *host)
> autocal->pull_down_hs400 = autocal->pull_down_1v8;
> }
>
> +static void tegra_sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
> +{
> + struct sdhci_host *host = mmc_priv(mmc);
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct sdhci_tegra *tegra_host = sdhci_pltfm_priv(pltfm_host);
> + ktime_t since_calib = ktime_sub(ktime_get(), tegra_host->last_calib);
> +
> + /* 100 ms calibration interval is specified in the TRM */
> + if (ktime_to_ms(since_calib) > 100) {
> + tegra_sdhci_pad_autocalib(host);
> + tegra_host->last_calib = ktime_get();
> + }
> +
> + sdhci_request(mmc, mrq);
> +}
> +
> static void tegra_sdhci_parse_tap_and_trim(struct sdhci_host *host)
> {
> struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> @@ -1014,6 +1032,10 @@ static int sdhci_tegra_probe(struct platform_device *pdev)
> sdhci_tegra_start_signal_voltage_switch;
> }
>
> + /* Hook to periodically rerun pad calibration */
> + if (soc_data->nvquirks & NVQUIRK_HAS_PADCALIB)
> + host->mmc_host_ops.request = tegra_sdhci_request;
> +
> host->mmc_host_ops.hs400_enhanced_strobe =
> tegra_sdhci_hs400_enhanced_strobe;
>
> --
> 2.7.4
>
next prev parent reply other threads:[~2018-09-03 6:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-20 9:23 [PATCH 0/2] Tegra SDHCI rerun pad calibration periodically Aapo Vienamo
2018-08-20 9:23 ` [PATCH 1/2] mmc: sdhci: Export sdhci_request() Aapo Vienamo
2018-08-22 10:54 ` Adrian Hunter
2018-08-27 10:07 ` Ulf Hansson
2018-08-27 10:11 ` Thierry Reding
2018-08-20 9:23 ` [PATCH 2/2] mmc: tegra: Implement periodic pad calibration Aapo Vienamo
2018-08-22 10:56 ` Adrian Hunter
2018-08-31 14:00 ` Thierry Reding
2018-09-03 6:14 ` Ulf Hansson [this message]
2018-08-23 8:50 ` [PATCH 0/2] Tegra SDHCI rerun pad calibration periodically Thierry Reding
2018-08-27 9:55 ` Ulf Hansson
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