From: Veerabhadrarao Badiganti vbadigan@codeaurora.org
commit 9253d71011c349d5f5cc0cebdf68b4a80811b92d upstream.
Clear tuning_done flag while executing tuning to ensure vendor specific HS400 settings are applied properly when the controller is re-initialized in HS400 mode.
Without this, re-initialization of the qcom SDHC in HS400 mode fails while resuming the driver from runtime-suspend or system-suspend.
Fixes: ff06ce417828 ("mmc: sdhci-msm: Add HS400 platform support") Cc: stable@vger.kernel.org Signed-off-by: Veerabhadrarao Badiganti vbadigan@codeaurora.org Link: https://lore.kernel.org/r/1590678838-18099-1-git-send-email-vbadigan@codeaur... Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mmc/host/sdhci-msm.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -1084,6 +1084,12 @@ static int sdhci_msm_execute_tuning(stru msm_host->use_cdr = true;
/* + * Clear tuning_done flag before tuning to ensure proper + * HS400 settings. + */ + msm_host->tuning_done = 0; + + /* * For HS400 tuning in HS200 timing requires: * - select MCLK/2 in VENDOR_SPEC * - program MCLK to 400MHz (or nearest supported) in GCC