Messages in this thread | | | From | Ulf Hansson <> | Date | Mon, 25 Mar 2019 14:27:18 +0100 | Subject | Re: [PATCH v3 2/3] mmc: sdhci-of-arasan: Add DTS property to disable DCMDs. |
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On Fri, 22 Mar 2019 at 12:39, Christoph Muellner <christoph.muellner@theobroma-systems.com> wrote: > > Direct commands (DCMDs) are an optional feature of eMMC 5.1's command > queue engine (CQE). The Arasan eMMC 5.1 controller uses the CQHCI, > which exposes a control register bit to enable the feature. > The current implementation sets this bit unconditionally. > > This patch allows to suppress the feature activation, > by specifying the property disable-cqe-dcmd. > > Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com> > Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> > Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Applied for next, thanks!
Perhaps both patch1 and patch2 should be tagged for stable? Then please tell me and I can add a tag.
Kind regards Uffe
> --- > drivers/mmc/host/sdhci-of-arasan.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c > index c9e3e050ccc8..88dc3f00a5be 100644 > --- a/drivers/mmc/host/sdhci-of-arasan.c > +++ b/drivers/mmc/host/sdhci-of-arasan.c > @@ -832,7 +832,10 @@ static int sdhci_arasan_probe(struct platform_device *pdev) > host->mmc_host_ops.start_signal_voltage_switch = > sdhci_arasan_voltage_switch; > sdhci_arasan->has_cqe = true; > - host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD; > + host->mmc->caps2 |= MMC_CAP2_CQE; > + > + if (!of_property_read_bool(np, "disable-cqe-dcmd")) > + host->mmc->caps2 |= MMC_CAP2_CQE_DCMD; > } > > ret = sdhci_arasan_add_host(sdhci_arasan); > -- > 2.11.0 >
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