Re: [PATCH V3 01/10] mmc: tegra: fix ddr signaling for non-ddr modes

Ulf Hansson
2019-03-21T10:33:13Z

On Wed, 13 Mar 2019 at 22:45, Sowjanya Komatineni
<skomatineni@nvidia.com> wrote:
>
> ddr_signaling is set to true for DDR50 and DDR52 modes but is
> not set back to false for other modes. This programs incorrect
> host clock when mode change happens from DDR52/DDR50 to other
> SDR or HS modes like incase of mmc_retune where it switches
> from HS400 to HS DDR and then from HS DDR to HS mode and then
> to HS200.
>
> This patch fixes the ddr_signaling to set properly for non DDR
> modes.
>
> Tested-by: Jon Hunter <jonathanh@nvidia.com>
> Acked-by: Adrian Hunter <adrian.hunter@intel.com>
> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>

Is this a fix and/or shall I tag it for stable?

The series looks good to me, however I am awaiting two more acks from
Adrian on patch 2 and patch3.

Kind regards
Uffe

> ---
> drivers/mmc/host/sdhci-tegra.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
> index 32e62904c0d3..46086dd43bfb 100644
> --- a/drivers/mmc/host/sdhci-tegra.c
> +++ b/drivers/mmc/host/sdhci-tegra.c
> @@ -779,6 +779,7 @@ static void tegra_sdhci_set_uhs_signaling(struct sdhci_host *host,
> bool set_dqs_trim = false;
> bool do_hs400_dll_cal = false;
>
> + tegra_host->ddr_signaling = false;
> switch (timing) {
> case MMC_TIMING_UHS_SDR50:
> case MMC_TIMING_UHS_SDR104:
> --
> 2.7.4
>