On Thu, May 23, 2024 at 06:41:04AM +0000, Lin Gui (桂林) wrote:

Dear @Greg KHmailto:gregkh@linuxfoundation.org,

What is the git id of it in Linus's tree? [MTK]

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/dr...

author Mengqi Zhang mengqi.zhang@mediatek.com 2023-12-25 17:38:40 +0800 committer Ulf Hansson ulf.hansson@linaro.org 2024-01-02 17:54:05 +0100 commit 77e01b49e35f24ebd1659096d5fc5c3b75975545 (patch) tree 02a13063666685bc7061b46183fc45298b2dc9f4 /drivers/mmc/core/mmc.c parent 09f164d393a6671e5ff8342ba6b3cb7fe3f20208 (diff) download linux-77e01b49e35f24ebd1659096d5fc5c3b75975545.tar.gz 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.orgmailto:ulf.hansson@linaro.org

I don't understand, why does this qualify as a stable patch? The changes says this is "optional", which means the device should work just fine without it, right?

Is this a regression fix from something that previously used to work properly?

You have read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html right?

thanks,

greg k-h