Re: [PATCH 1/3] mmc: tegra: prevent HS200 on Tegra 3

Ulf Hansson
2018-07-16T10:11:18Z

On 12 July 2018 at 09:39, Stefan Agner <stefan@agner.ch> wrote:
> The stack assumes that SDHC controller which support SD3.0 (SDR104) do
> support HS200. This is not the case for Tegra 3, which does support SD
> 3.0
> but only supports eMMC spec 4.41.
>
> Use SDHCI_QUIRK2_BROKEN_HS200 to indicate that the controller does not
> support HS200.
>
> Note that commit 156e14b126ff ("mmc: sdhci: fix caps2 for HS200") added
> the tie between SD3.0 (SDR104) and HS200. I don't think that this is
> necessarly true. It is fully legitimate to support SD3.0 and not support
> HS200. The quirk naming suggests something is broken in the controller,
> but this is not the case: The controller simply does not support HS200.
>
> Fixes: 7ad2ed1dfcbe ("mmc: tegra: enable UHS-I modes")
> Signed-off-by: Stefan Agner <stefan@agner.ch>

Thanks, applied all three patches for next!

Kind regards
Uffe

> ---
> drivers/mmc/host/sdhci-tegra.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index 970d38f68939..137df06b9b6e 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -334,7 +334,8 @@ static const struct sdhci_pltfm_data sdhci_tegra30_pdata = {
> SDHCI_QUIRK_NO_HISPD_BIT |
> SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
> SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
> - .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
> + .quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
> + SDHCI_QUIRK2_BROKEN_HS200,
> .ops = &tegra_sdhci_ops,
> };
>
> --
> 2.18.0
>
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