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scsi: ufs-mediatek: Support option to disable auto-hibern8 

Support an option to allow users to disable auto-hibern8 feature.

Instead, enable hibern8-during-clk-gating feature to keep similar power
consumption.

Link: https://lore.kernel.org/r/20201029115750.24391-5-stanley.chu@mediatek.com
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu 2020-10-29 19:57:48 +08:00 committed by Martin K. Petersen
parent ac8c245909
commit bf8fab86ab
2 changed files with 19 additions and 0 deletions
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18
drivers/scsi/ufs/ufs-mediatek.c
View File

@ -158,6 +158,7 @@ static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
enum ufs_notify_change_status status)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
unsigned long flags;
if (status == PRE_CHANGE) {
if (host->unipro_lpm) {
@ -169,6 +170,17 @@ static int ufs_mtk_hce_enable_notify(struct ufs_hba *hba,
if (hba->caps & UFSHCD_CAP_CRYPTO)
ufs_mtk_crypto_enable(hba);
if (host->caps & UFS_MTK_CAP_DISABLE_AH8) {
spin_lock_irqsave(hba->host->host_lock, flags);
ufshcd_writel(hba, 0,
REG_AUTO_HIBERNATE_IDLE_TIMER);
spin_unlock_irqrestore(hba->host->host_lock,
flags);
hba->capabilities &= ~MASK_AUTO_HIBERN8_SUPPORT;
hba->ahit = 0;
}
}
return 0;
@ -496,6 +508,9 @@ static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
if (of_property_read_bool(np, "mediatek,ufs-support-va09"))
ufs_mtk_init_va09_pwr_ctrl(hba);
if (of_property_read_bool(np, "mediatek,ufs-disable-ah8"))
host->caps |= UFS_MTK_CAP_DISABLE_AH8;
dev_info(hba->dev, "caps: 0x%x", host->caps);
}
@ -609,6 +624,9 @@ static int ufs_mtk_init(struct ufs_hba *hba)
hba->caps |= UFSHCD_CAP_WB_EN;
hba->vps->wb_flush_threshold = UFS_WB_BUF_REMAIN_PERCENT(80);
if (host->caps & UFS_MTK_CAP_DISABLE_AH8)
hba->caps |= UFSHCD_CAP_HIBERN8_WITH_CLK_GATING;
/*
* ufshcd_vops_init() is invoked after
* ufshcd_setup_clock(true) in ufshcd_hba_init() thus

1
drivers/scsi/ufs/ufs-mediatek.h
View File

@ -96,6 +96,7 @@ enum {
enum ufs_mtk_host_caps {
UFS_MTK_CAP_BOOST_CRYPT_ENGINE = 1 << 0,
UFS_MTK_CAP_VA09_PWR_CTRL = 1 << 1,
UFS_MTK_CAP_DISABLE_AH8 = 1 << 2,
};
struct ufs_mtk_crypt_cfg {