• Daniel Kurtz's avatar
    mmc: sdhci-pci: Only do AMD tuning for HS200 · 300ad899
    Daniel Kurtz authored
    Commit c31165d7 ("mmc: sdhci-pci: Add support for HS200 tuning mode
    on AMD, eMMC-4.5.1") added a HS200 tuning method for use with AMD SDHCI
    controllers.  As described in the commit subject, this tuning is specific
    for HS200.  However, as implemented, this method is used for all host
    timings, because platform_execute_tuning, if it exists, is called
    unconditionally by sdhci_execute_tuning().  This breaks tuning when using
    the AMD controller with, for example, a DDR50 SD card.
    
    Instead, we can implement an amd execute_tuning wrapper callback, and
    then conditionally do the HS200 specific tuning for HS200, and otherwise
    call back to the standard sdhci_execute_tuning().
    Signed-off-by: default avatarDaniel Kurtz <djkurtz@chromium.org>
    Acked-by: default avatarShyam Sundar S K <Shyam-sundar.S-k@amd.com>
    Acked-by: default avatarAdrian Hunter <adrian.hunter@intel.com>
    Fixes: c31165d7 ("mmc: sdhci-pci: Add support for HS200 tuning mode on AMD, eMMC-4.5.1")
    Cc: stable@vger.kernel.org # v4.11+
    Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
    300ad899
sdhci-pci-core.c 48.5 KB