6.1-stable review patch. If anyone has any objections, please let me know.
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From: Mengqi Zhang mengqi.zhang@mediatek.com
commit 77e01b49e35f24ebd1659096d5fc5c3b75975545 upstream.
During the initialization to HS400es stage, add a HS400 tuning flow as an optional process. For Mediatek IP, the HS400es mode requires a specific tuning to ensure the correct HS400 timing setting.
Signed-off-by: Mengqi Zhang mengqi.zhang@mediatek.com Link: https://lore.kernel.org/r/20231225093839.22931-2-mengqi.zhang@mediatek.com Signed-off-by: Ulf Hansson ulf.hansson@linaro.org Cc: "Lin Gui (桂林)" Lin.Gui@mediatek.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/mmc/core/mmc.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
--- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1819,8 +1819,13 @@ static int mmc_init_card(struct mmc_host
if (err) goto free_card; - - } else if (!mmc_card_hs400es(card)) { + } else if (mmc_card_hs400es(card)) { + if (host->ops->execute_hs400_tuning) { + err = host->ops->execute_hs400_tuning(host, card); + 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)) {