scsi: ufs: ufs-mediatek: Migrate to UFSHCD generic CPU latency PM QoS support

The PM QoS feature found in the MediaTek UFS driver was moved to the UFSHCD
core. Hence remove it from MediaTek UFS driver as it is redundant now.
Reviewed-by: Peter Wang <peter.wang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Maramaina Naresh <quic_mnaresh@quicinc.com>
Link: https://lore.kernel.org/r/20231219123706.6463-3-quic_mnaresh@quicinc.comReviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/ufs/host/ufs-mediatek.c

@@ -17,7 +17,6 @@
 #include <linux/of_platform.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
-#include <linux/pm_qos.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
 #include <linux/soc/mediatek/mtk_sip_svc.h>
@@ -626,21 +625,9 @@ static void ufs_mtk_init_host_caps(struct ufs_hba *hba)
 	dev_info(hba->dev, "caps: 0x%x", host->caps);
 }
 
-static void ufs_mtk_boost_pm_qos(struct ufs_hba *hba, bool boost)
-{
-	struct ufs_mtk_host *host = ufshcd_get_variant(hba);
-
-	if (!host || !host->pm_qos_init)
-		return;
-
-	cpu_latency_qos_update_request(&host->pm_qos_req,
-				       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)
@@ -959,10 +946,6 @@ 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:

drivers/ufs/host/ufs-mediatek.h

@@ -7,7 +7,6 @@
 #define _UFS_MEDIATEK_H
 
 #include <linux/bitops.h>
-#include <linux/pm_qos.h>
 #include <linux/soc/mediatek/mtk_sip_svc.h>
 
 /*
@@ -167,7 +166,6 @@ struct ufs_mtk_mcq_intr_info {
 
 struct ufs_mtk_host {
 	struct phy *mphy;
-	struct pm_qos_request pm_qos_req;
 	struct regulator *reg_va09;
 	struct reset_control *hci_reset;
 	struct reset_control *unipro_reset;
@@ -178,7 +176,6 @@ struct ufs_mtk_host {
 	struct ufs_mtk_hw_ver hw_ver;
 	enum ufs_mtk_host_caps caps;
 	bool mphy_powered_on;
-	bool pm_qos_init;
 	bool unipro_lpm;
 	bool ref_clk_enabled;
 	u16 ref_clk_ungating_wait_us;