During the initialization to HS400es stage, add hs400 tuning flow as an optional process. For Mediatek IP, HS00es mode requires a specific tuning to ensure the correct HS400 timing setting. Signed-off-by: Mengqi Zhang <mengqi.zhang@xxxxxxxxxxxx> --- the previous patch link: https://patchwork.kernel.org/project/linux-mediatek/patch/20231201030547.11553-1-mengqi.zhang@xxxxxxxxxxxx/ --- drivers/mmc/core/mmc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 705942edacc6..9760eea2c104 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1823,7 +1823,15 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, if (err) goto free_card; - } else if (!mmc_card_hs400es(card)) { + } else if (mmc_card_hs400es(card)) { + if (host->ops->execute_hs400_tuning) { + mmc_retune_disable(host); + err = host->ops->execute_hs400_tuning(host, card); + mmc_retune_enable(host); + if (err) + goto free_card; + } + } else { /* Select the desired bus width optionally */ err = mmc_select_bus_width(card); if (err > 0 && mmc_card_hs(card)) { -- 2.25.1
