mmc: core: Add HS400 tuning in HS400es initialization

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>

diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index adf7b70cf1b660523a35b05f5b22bfadea9a1c64..f410bee501328f6af96b4f0029d4856e45e06766 100644 (file)
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1831,8 +1831,13 @@ 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) {
+                       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)) {