This is a note to let you know that I've just added the patch titled
mmc: core: Add HS400 tuning in HS400es initialization
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mmc-core-add-hs400-tuning-in-hs400es-initialization.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 77e01b49e35f24ebd1659096d5fc5c3b75975545 Mon Sep 17 00:00:00 2001
From: Mengqi Zhang <mengqi.zhang@xxxxxxxxxxxx>
Date: Mon, 25 Dec 2023 17:38:40 +0800
Subject: mmc: core: Add HS400 tuning in HS400es initialization
From: Mengqi Zhang <mengqi.zhang@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20231225093839.22931-2-mengqi.zhang@xxxxxxxxxxxx
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
Cc: "Lin Gui (桂林)" <Lin.Gui@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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)) {
Patches currently in stable-queue which might be from mengqi.zhang@xxxxxxxxxxxx are
queue-6.6/mmc-core-add-hs400-tuning-in-hs400es-initialization.patch
