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Bottomley" , "Martin K. Petersen" , Philipp Zabel Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, Nitin Rawat , Can Guo , Naveen Kumar Goud Arepalli Subject: [PATCH V1 1/2] scsi: ufs: qcom : Refactor phy_power_on/off calls Date: Fri, 12 Jan 2024 21:03:47 +0530 Message-ID: <20240112153348.2778-2-quic_nitirawa@quicinc.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240112153348.2778-1-quic_nitirawa@quicinc.com> References: <20240112153348.2778-1-quic_nitirawa@quicinc.com> MIME-Version: 1.0 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: C7N-JZh34DGIwAaF3Xk_088i4JIBFbE1 X-Proofpoint-ORIG-GUID: C7N-JZh34DGIwAaF3Xk_088i4JIBFbE1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_02,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxlogscore=999 priorityscore=1501 clxscore=1015 phishscore=0 suspectscore=0 malwarescore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401120121 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240112_073403_926235_2B6252B1 X-CRM114-Status: GOOD ( 21.40 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Commit 3f6d1767b1a0 ("phy: ufs-qcom: Refactor all init steps into phy_poweron") removes the phy_power_on/off from ufs_qcom_setup_clocks to suspend/resume func. To have a better power saving, remove the phy_power_on/off calls from resume/suspend path and put them back to ufs_qcom_setup_clocks, so that PHY's regulators & clks can be turned on/off along with UFS's clocks. Since phy phy_power_on is separated out from phy calibrate, make separate calls to phy_power_on and phy_calibrate calls from ufs qcom driver. Also add a mutex lock to protect the usage of is_phy_pwr_on against possible racing. Co-developed-by: Can Guo Signed-off-by: Can Guo Co-developed-by: Naveen Kumar Goud Arepalli Signed-off-by: Naveen Kumar Goud Arepalli Signed-off-by: Nitin Rawat --- drivers/ufs/host/ufs-qcom.c | 104 +++++++++++++++++++++++------------- drivers/ufs/host/ufs-qcom.h | 4 ++ 2 files changed, 72 insertions(+), 36 deletions(-) -- 2.43.0 diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 39eef470f8fa..2721a30f0db8 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -338,6 +338,46 @@ static u32 ufs_qcom_get_hs_gear(struct ufs_hba *hba) return UFS_HS_G3; } +static int ufs_qcom_phy_power_on(struct ufs_hba *hba) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + struct phy *phy = host->generic_phy; + int ret = 0; + + mutex_lock(&host->phy_mutex); + if (!host->is_phy_pwr_on) { + ret = phy_power_on(phy); + if (ret) { + mutex_unlock(&host->phy_mutex); + return ret; + } + host->is_phy_pwr_on = true; + } + mutex_unlock(&host->phy_mutex); + + return ret; +} + +static int ufs_qcom_phy_power_off(struct ufs_hba *hba) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + struct phy *phy = host->generic_phy; + int ret = 0; + + mutex_lock(&host->phy_mutex); + if (host->is_phy_pwr_on) { + ret = phy_power_off(phy); + if (ret) { + mutex_unlock(&host->phy_mutex); + return ret; + } + host->is_phy_pwr_on = false; + } + mutex_unlock(&host->phy_mutex); + + return ret; +} + static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); @@ -378,13 +418,18 @@ static int ufs_qcom_power_up_sequence(struct ufs_hba *hba) goto out_disable_phy; /* power on phy - start serdes and phy's power and clocks */ - ret = phy_power_on(phy); + ret = ufs_qcom_phy_power_on(hba); if (ret) { dev_err(hba->dev, "%s: phy power on failed, ret = %d\n", __func__, ret); goto out_disable_phy; } + ret = phy_calibrate(phy); + if (ret) { + dev_err(hba->dev, "%s: Failed to calibrate PHY %d\n", + __func__, ret); + } ufs_qcom_select_unipro_mode(host); return 0; @@ -557,26 +602,17 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, enum ufs_notify_change_status status) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - struct phy *phy = host->generic_phy; if (status == PRE_CHANGE) return 0; - if (ufs_qcom_is_link_off(hba)) { - /* - * Disable the tx/rx lane symbol clocks before PHY is - * powered down as the PLL source should be disabled - * after downstream clocks are disabled. - */ + if (!ufs_qcom_is_link_active(hba)) ufs_qcom_disable_lane_clks(host); - phy_power_off(phy); - /* reset the connected UFS device during power down */ - ufs_qcom_device_reset_ctrl(hba, true); - } else if (!ufs_qcom_is_link_active(hba)) { - ufs_qcom_disable_lane_clks(host); - } + /* reset the connected UFS device during power down */ + if (ufs_qcom_is_link_off(hba) && host->device_reset) + ufs_qcom_device_reset_ctrl(hba, true); return ufs_qcom_ice_suspend(host); } @@ -584,26 +620,11 @@ static int ufs_qcom_suspend(struct ufs_hba *hba, enum ufs_pm_op pm_op, static int ufs_qcom_resume(struct ufs_hba *hba, enum ufs_pm_op pm_op) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); - struct phy *phy = host->generic_phy; int err; - if (ufs_qcom_is_link_off(hba)) { - err = phy_power_on(phy); - if (err) { - dev_err(hba->dev, "%s: failed PHY power on: %d\n", - __func__, err); - return err; - } - - err = ufs_qcom_enable_lane_clks(host); - if (err) - return err; - - } else if (!ufs_qcom_is_link_active(hba)) { - err = ufs_qcom_enable_lane_clks(host); - if (err) - return err; - } + err = ufs_qcom_enable_lane_clks(host); + if (err) + return err; return ufs_qcom_ice_resume(host); } @@ -908,6 +929,7 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, enum ufs_notify_change_status status) { struct ufs_qcom_host *host = ufshcd_get_variant(hba); + int err; /* * In case ufs_qcom_init() is not yet done, simply ignore. @@ -926,10 +948,22 @@ static int ufs_qcom_setup_clocks(struct ufs_hba *hba, bool on, /* disable device ref_clk */ ufs_qcom_dev_ref_clk_ctrl(host, false); } + err = ufs_qcom_phy_power_off(hba); + if (err) { + dev_err(hba->dev, "%s: phy power off failed, ret=%d\n", + __func__, err); + return err; + } } break; case POST_CHANGE: if (on) { + err = ufs_qcom_phy_power_on(hba); + if (err) { + dev_err(hba->dev, "%s: phy power on failed, ret = %d\n", + __func__, err); + return err; + } /* enable the device ref clock for HS mode*/ if (ufshcd_is_hs_mode(&hba->pwr_info)) ufs_qcom_dev_ref_clk_ctrl(host, true); @@ -1110,7 +1144,7 @@ static void ufs_qcom_exit(struct ufs_hba *hba) struct ufs_qcom_host *host = ufshcd_get_variant(hba); ufs_qcom_disable_lane_clks(host); - phy_power_off(host->generic_phy); + ufs_qcom_phy_power_off(hba); phy_exit(host->generic_phy); } @@ -1536,9 +1570,7 @@ static void ufs_qcom_config_scaling_param(struct ufs_hba *hba, static void ufs_qcom_reinit_notify(struct ufs_hba *hba) { - struct ufs_qcom_host *host = ufshcd_get_variant(hba); - - phy_power_off(host->generic_phy); + ufs_qcom_phy_power_off(hba); } /* Resources */ diff --git a/drivers/ufs/host/ufs-qcom.h b/drivers/ufs/host/ufs-qcom.h index 9dd9a391ebb7..241dba01672e 100644 --- a/drivers/ufs/host/ufs-qcom.h +++ b/drivers/ufs/host/ufs-qcom.h @@ -215,6 +215,10 @@ struct ufs_qcom_host { u32 phy_gear; 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Fri, 12 Jan 2024 15:33:55 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 40CFXs09032701; Fri, 12 Jan 2024 15:33:55 GMT Received: from hu-maiyas-hyd.qualcomm.com (hu-nitirawa-hyd.qualcomm.com [10.213.109.152]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 40CFXsOo032699; Fri, 12 Jan 2024 15:33:54 +0000 Received: by hu-maiyas-hyd.qualcomm.com (Postfix, from userid 2342877) id C1DA8572C41; Fri, 12 Jan 2024 21:03:53 +0530 (+0530) From: Nitin Rawat To: Bjorn Andersson , Konrad Dybcio , Vinod Koul , Kishon Vijay Abraham I , Manivannan Sadhasivam , "James E.J. Bottomley" , "Martin K. Petersen" , Philipp Zabel Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, Nitin Rawat , Can Guo , Naveen Kumar Goud Arepalli Subject: [PATCH V1 2/2] phy: qcom: Refactor phy_power_on and phy_calibrate callbacks Date: Fri, 12 Jan 2024 21:03:48 +0530 Message-ID: <20240112153348.2778-3-quic_nitirawa@quicinc.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240112153348.2778-1-quic_nitirawa@quicinc.com> References: <20240112153348.2778-1-quic_nitirawa@quicinc.com> MIME-Version: 1.0 X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: W_m_O80bD-vsP4rYHoQoX6eCtor04T36 X-Proofpoint-GUID: W_m_O80bD-vsP4rYHoQoX6eCtor04T36 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-09_01,2023-12-07_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=999 clxscore=1015 malwarescore=0 impostorscore=0 mlxscore=0 adultscore=0 spamscore=0 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2311290000 definitions=main-2401120121 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240112_153429_358325_3FEE62F0 X-CRM114-Status: GOOD ( 20.19 ) X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org Commit 052553af6a31 ("ufs/phy: qcom: Refactor to use phy_init call") puts enabling regulators & clks, calibrating UFS PHY, starting serdes and polling PCS ready status into phy_power_on. In Current code regulators enable, clks enable, calibrating UFS PHY, start_serdes and polling PCS_ready_status are part of phy_power_on. UFS PHY registers are retained after power collapse, meaning calibrating UFS PHY, start_serdes and polling PCS_ready_status can be done only when hba is powered_on, and not needed every time when phy_power_on is called during resume. Hence keep the code which enables PHY's regulators & clks in phy_power_on and move the rest steps into phy_calibrate function. Refactor the code to enable PHY regulators & clks in phy_power_on and move rest of the code to phy_calibrate function. Co-developed-by: Can Guo Signed-off-by: Can Guo Co-developed-by: Naveen Kumar Goud Arepalli Signed-off-by: Naveen Kumar Goud Arepalli Signed-off-by: Nitin Rawat --- drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 183 +++++++++--------------- 1 file changed, 67 insertions(+), 116 deletions(-) -- 2.43.0 diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c index 3c2e6255e26f..ae0218738b0b 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c @@ -32,14 +32,15 @@ /* QPHY_SW_RESET bit */ #define SW_RESET BIT(0) /* QPHY_POWER_DOWN_CONTROL */ -#define SW_PWRDN BIT(0) +#define SW_PWRUP BIT(0) +#define SW_PWRDN 0 /* QPHY_START_CONTROL bits */ #define SERDES_START BIT(0) #define PCS_START BIT(1) /* QPHY_PCS_READY_STATUS bit */ #define PCS_READY BIT(0) -#define PHY_INIT_COMPLETE_TIMEOUT 10000 +#define PHY_INIT_COMPLETE_TIMEOUT 1000000 struct qmp_phy_init_tbl { unsigned int offset; @@ -1464,8 +1465,25 @@ static void qmp_ufs_init_registers(struct qmp_ufs *qmp, const struct qmp_phy_cfg qmp_ufs_pcs_init(qmp, &cfg->tbls_hs_g4); } -static int qmp_ufs_com_init(struct qmp_ufs *qmp) +static int qmp_ufs_power_off(struct phy *phy) +{ + struct qmp_ufs *qmp = phy_get_drvdata(phy); + const struct qmp_phy_cfg *cfg = qmp->cfg; + + /* Put PHY into POWER DOWN state: active low */ + qphy_clrbits(qmp->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], + SW_PWRDN); + + clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks); + + regulator_bulk_disable(cfg->num_vregs, qmp->vregs); + + return 0; +} + +static int qmp_ufs_power_on(struct phy *phy) { + struct qmp_ufs *qmp = phy_get_drvdata(phy); const struct qmp_phy_cfg *cfg = qmp->cfg; void __iomem *pcs = qmp->pcs; int ret; @@ -1480,8 +1498,7 @@ static int qmp_ufs_com_init(struct qmp_ufs *qmp) if (ret) goto err_disable_regulators; - qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], SW_PWRDN); - + qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], SW_PWRUP); return 0; err_disable_regulators: @@ -1490,61 +1507,7 @@ static int qmp_ufs_com_init(struct qmp_ufs *qmp) return ret; } -static int qmp_ufs_com_exit(struct qmp_ufs *qmp) -{ - const struct qmp_phy_cfg *cfg = qmp->cfg; - - reset_control_assert(qmp->ufs_reset); - - clk_bulk_disable_unprepare(cfg->num_clks, qmp->clks); - - regulator_bulk_disable(cfg->num_vregs, qmp->vregs); - - return 0; -} - -static int qmp_ufs_init(struct phy *phy) -{ - struct qmp_ufs *qmp = phy_get_drvdata(phy); - const struct qmp_phy_cfg *cfg = qmp->cfg; - int ret; - dev_vdbg(qmp->dev, "Initializing QMP phy\n"); - - if (cfg->no_pcs_sw_reset) { - /* - * Get UFS reset, which is delayed until now to avoid a - * circular dependency where UFS needs its PHY, but the PHY - * needs this UFS reset. - */ - if (!qmp->ufs_reset) { - qmp->ufs_reset = - devm_reset_control_get_exclusive(qmp->dev, - "ufsphy"); - - if (IS_ERR(qmp->ufs_reset)) { - ret = PTR_ERR(qmp->ufs_reset); - dev_err(qmp->dev, - "failed to get UFS reset: %d\n", - ret); - - qmp->ufs_reset = NULL; - return ret; - } - } - - ret = reset_control_assert(qmp->ufs_reset); - if (ret) - return ret; - } - - ret = qmp_ufs_com_init(qmp); - if (ret) - return ret; - - return 0; -} - -static int qmp_ufs_power_on(struct phy *phy) +static int qmp_ufs_phy_calibrate(struct phy *phy) { struct qmp_ufs *qmp = phy_get_drvdata(phy); const struct qmp_phy_cfg *cfg = qmp->cfg; @@ -1553,11 +1516,21 @@ static int qmp_ufs_power_on(struct phy *phy) unsigned int val; int ret; + qphy_setbits(pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], SW_PWRUP); + + ret = reset_control_assert(qmp->ufs_reset); + if (ret) { + dev_err(qmp->dev, "Failed to assert UFS PHY reset %d\n", ret); + return ret; + } + qmp_ufs_init_registers(qmp, cfg); ret = reset_control_deassert(qmp->ufs_reset); - if (ret) + if (ret) { + dev_err(qmp->dev, "Failed to deassert UFS PHY reset %d\n", ret); return ret; + } /* Pull PHY out of reset state */ if (!cfg->no_pcs_sw_reset) @@ -1577,59 +1550,6 @@ static int qmp_ufs_power_on(struct phy *phy) return 0; } -static int qmp_ufs_power_off(struct phy *phy) -{ - struct qmp_ufs *qmp = phy_get_drvdata(phy); - const struct qmp_phy_cfg *cfg = qmp->cfg; - - /* PHY reset */ - if (!cfg->no_pcs_sw_reset) - qphy_setbits(qmp->pcs, cfg->regs[QPHY_SW_RESET], SW_RESET); - - /* stop SerDes */ - qphy_clrbits(qmp->pcs, cfg->regs[QPHY_START_CTRL], SERDES_START); - - /* Put PHY into POWER DOWN state: active low */ - qphy_clrbits(qmp->pcs, cfg->regs[QPHY_PCS_POWER_DOWN_CONTROL], - SW_PWRDN); - - return 0; -} - -static int qmp_ufs_exit(struct phy *phy) -{ - struct qmp_ufs *qmp = phy_get_drvdata(phy); - - qmp_ufs_com_exit(qmp); - - return 0; -} - -static int qmp_ufs_enable(struct phy *phy) -{ - int ret; - - ret = qmp_ufs_init(phy); - if (ret) - return ret; - - ret = qmp_ufs_power_on(phy); - if (ret) - qmp_ufs_exit(phy); - - return ret; -} - -static int qmp_ufs_disable(struct phy *phy) -{ - int ret; - - ret = qmp_ufs_power_off(phy); - if (ret) - return ret; - return qmp_ufs_exit(phy); -} - static int qmp_ufs_set_mode(struct phy *phy, enum phy_mode mode, int submode) { struct qmp_ufs *qmp = phy_get_drvdata(phy); @@ -1641,9 +1561,10 @@ static int qmp_ufs_set_mode(struct phy *phy, enum phy_mode mode, int submode) } static const struct phy_ops qcom_qmp_ufs_phy_ops = { - .power_on = qmp_ufs_enable, - .power_off = qmp_ufs_disable, + .power_on = qmp_ufs_power_on, + .power_off = qmp_ufs_power_off, .set_mode = qmp_ufs_set_mode, + .calibrate = qmp_ufs_phy_calibrate, .owner = THIS_MODULE, }; @@ -1809,6 +1730,32 @@ static int qmp_ufs_parse_dt(struct qmp_ufs *qmp) return 0; } +static int qmp_ufs_get_phy_reset(struct qmp_ufs *qmp) +{ + const struct qmp_phy_cfg *cfg = qmp->cfg; + int ret; + + if (!cfg->no_pcs_sw_reset) + return 0; + + /* + * Get UFS reset, which is delayed until now to avoid a + * circular dependency where UFS needs its PHY, but the PHY + * needs this UFS reset. + */ + + qmp->ufs_reset = devm_reset_control_get_exclusive(qmp->dev, + "ufsphy"); + if (IS_ERR(qmp->ufs_reset)) { + ret = PTR_ERR(qmp->ufs_reset); + dev_err(qmp->dev, "failed to get UFS reset: %d\n", ret); + qmp->ufs_reset = NULL; + return ret; + } + + return 0; +} + static int qmp_ufs_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -1835,6 +1782,10 @@ static int qmp_ufs_probe(struct platform_device *pdev) if (ret) return ret; + ret = qmp_ufs_get_phy_reset(qmp); + if (ret) + return ret; + /* Check for legacy binding with child node. */ np = of_get_next_available_child(dev->of_node, NULL); if (np) {