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AJvYcCWQSK+C6A29weZiSGEkOxSocq5G84M8UIXyiHxdmvaHrlpGEjBy1cuCpd7htjj8t3AgKhXiwY7FhLL3@vger.kernel.org X-Gm-Message-State: AOJu0YxvW8ufFT0qJA3dd3VdjzeOQFPeMFC9amvdePoW2FRdiblZoB0I t6lGn7kF4So8eP57TBXNjGvIsBphTi4uxGrDyMqoRdkCvhXtyQiz5d073UD2o1w= X-Google-Smtp-Source: AGHT+IEoUmmF2a29+b6OYTb4dbCjEKsfEZfPzHCBO3Ytnq8YsVvh+s+5uHtHvSiBw8IREAZ9aiGHMw== X-Received: by 2002:a05:600c:468f:b0:42c:a6da:a149 with SMTP id 5b1f17b1804b1-4318c73a46amr48990985e9.25.1729862089150; Fri, 25 Oct 2024 06:14:49 -0700 (PDT) Received: from gpeter-l.lan ([145.224.67.228]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4318b58b6bdsm47616685e9.45.2024.10.25.06.14.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Oct 2024 06:14:48 -0700 (PDT) From: Peter Griffin To: alim.akhtar@samsung.com, James.Bottomley@HansenPartnership.com, martin.petersen@oracle.com, avri.altman@wdc.com, bvanassche@acm.org, krzk@kernel.org Cc: tudor.ambarus@linaro.org, andre.draszik@linaro.org, kernel-team@android.com, willmcvicker@google.com, linux-scsi@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, ebiggers@kernel.org, Peter Griffin Subject: [PATCH v2 01/11] scsi: ufs: exynos: Allow UFS Gear 4 Date: Fri, 25 Oct 2024 14:14:32 +0100 Message-ID: <20241025131442.112862-2-peter.griffin@linaro.org> X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog In-Reply-To: <20241025131442.112862-1-peter.griffin@linaro.org> References: <20241025131442.112862-1-peter.griffin@linaro.org> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 UFS Gear 4 offers faster speeds, and better power usage so lets enable it. Currently ufshcd_init_host_params() sets UFS_HS_G3 as a default, so even if the device supports G4 we end up negotiating down to G3. For SoCs like gs101 which have a UFS major controller version of 3 or above advertise Gear 4. This then allows a Gear 4 link on Pixel 6. For earlier controller versions keep the current default behaviour of reporting G3. Signed-off-by: Peter Griffin Reviewed-by: Tudor Ambarus --- drivers/ufs/host/ufs-exynos.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/ufs/host/ufs-exynos.c b/drivers/ufs/host/ufs-exynos.c index 9ec318ef52bf..e25de4b86ac0 100644 --- a/drivers/ufs/host/ufs-exynos.c +++ b/drivers/ufs/host/ufs-exynos.c @@ -771,6 +771,21 @@ static void exynos_ufs_config_sync_pattern_mask(struct exynos_ufs *ufs, exynos_ufs_disable_ov_tm(hba); } +#define UFS_HW_VER_MAJOR_MASK GENMASK(15, 8) + +static u32 exynos_ufs_get_hs_gear(struct ufs_hba *hba) +{ + u8 major; + + major = FIELD_GET(UFS_HW_VER_MAJOR_MASK, hba->ufs_version); + + if (major >= 3) + return UFS_HS_G4; + + /* Default is HS-G3 */ + return UFS_HS_G3; +} + static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba, struct ufs_pa_layer_attr *dev_max_params, struct ufs_pa_layer_attr *dev_req_params) @@ -787,6 +802,8 @@ static int exynos_ufs_pre_pwr_mode(struct ufs_hba *hba, } ufshcd_init_host_params(&host_params); + /* This driver only support symmetric gear setting e.g. hs_tx_gear == hs_rx_gear */ + host_params.hs_tx_gear = host_params.hs_rx_gear = exynos_ufs_get_hs_gear(hba); ret = ufshcd_negotiate_pwr_params(&host_params, dev_max_params, dev_req_params); if (ret) {