[PATCH v4 4/5] scsi: ufs: ufs-mediatek: Fix performance scaling

Stanley Chu
2022-08-02T13:55:22Z

From: Peter Wang <peter.wang@mediatek.com>

If clk-scaling is enabled, performance scaling can be bound
to the decision of clk-scaling to avoid unnecessary boosting.

Meanwhile, fix missing initialization of pm-qos request.

Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Peter Wang <peter.wang@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
---
drivers/ufs/host/ufs-mediatek.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/drivers/ufs/host/ufs-mediatek.c b/drivers/ufs/host/ufs-mediatek.c
index 2b85d2406714..e1f131a93792 100644
--- a/drivers/ufs/host/ufs-mediatek.c
+++ b/drivers/ufs/host/ufs-mediatek.c
@@ -635,6 +635,12 @@ static void ufs_mtk_boost_pm_qos(struct ufs_hba *hba, bool boost)
boost ? 0 : PM_QOS_DEFAULT_VALUE);
}

+static void ufs_mtk_scale_perf(struct ufs_hba *hba, bool scale_up)
+{
+ ufs_mtk_boost_crypt(hba, scale_up);
+ ufs_mtk_boost_pm_qos(hba, scale_up);
+}
+
static void ufs_mtk_pwr_ctrl(struct ufs_hba *hba, bool on)
{
struct ufs_mtk_host *host = ufshcd_get_variant(hba);
@@ -642,11 +648,11 @@ static void ufs_mtk_pwr_ctrl(struct ufs_hba *hba, bool on)
if (on) {
phy_power_on(host->mphy);
ufs_mtk_setup_ref_clk(hba, on);
- ufs_mtk_boost_crypt(hba, on);
- ufs_mtk_boost_pm_qos(hba, on);
+ if (!ufshcd_is_clkscaling_supported(hba))
+ ufs_mtk_scale_perf(hba, on);
} else {
- ufs_mtk_boost_pm_qos(hba, on);
- ufs_mtk_boost_crypt(hba, on);
+ if (!ufshcd_is_clkscaling_supported(hba))
+ ufs_mtk_scale_perf(hba, on);
ufs_mtk_setup_ref_clk(hba, on);
phy_power_off(host->mphy);
}
@@ -870,6 +876,10 @@ static int ufs_mtk_init(struct ufs_hba *hba)

host->ip_ver = ufshcd_readl(hba, REG_UFS_MTK_IP_VER);

+ /* Initialize pm-qos request */
+ cpu_latency_qos_add_request(&host->pm_qos_req, PM_QOS_DEFAULT_VALUE);
+ host->pm_qos_init = true;
+
goto out;

out_variant_clear:
--
2.18.0