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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-829a48d3ccfsm1983502b3a.59.2026.03.06.05.41.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 Mar 2026 05:41:41 -0800 (PST) Message-ID: <64e7d659-12ee-443b-a45c-ca985951dec8@oss.qualcomm.com> Date: Fri, 6 Mar 2026 21:41:37 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 08/11] scsi: ufs: ufs-qcom: Implement vops tx_eqtr_notify() To: Manivannan Sadhasivam Cc: avri.altman@wdc.com, bvanassche@acm.org, beanhuo@micron.com, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, "James E.J. Bottomley" , "open list:ARM/QUALCOMM MAILING LIST" , open list References: <20260304135313.413688-1-can.guo@oss.qualcomm.com> <20260304135313.413688-9-can.guo@oss.qualcomm.com> Content-Language: en-US From: Can Guo In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA2MDEzMSBTYWx0ZWRfXwtYD/JcLkSZa TNt3T1nZVNZu7XgdZlmlYeg/92BKyg8WSwW42uqnIShs6Eo2OMPx9dC2r9MiTPvqCTvYjmsdrgy as7ZJhQtxpSW7c8nPMiWZM0umW2WElzYEOYsw266Bpy7j5wK49zSHvclfDOox3PNAbTCr3TCZDf gOnBIOwso9WsIGPZeEBJZgtP5RGe6bouihSOk1ApwFIRcy3UkjACth5+28ZEyuct9XIy9T37rzn JyOsLyJa5+vzzHYsyGW6QY5E52cyyi5RYoHsq+yfWivCMfeRTUKDLioVGGYARoZxas2A2bFKSt6 g514b5FHxrYybueTqYv55zAiyPXhzNfpKQA4h6NUwnQwcXPRCDFM1UNoF1o2nQSn9iCr5r71iFj ssMEQ86R6ncfOs5WwjeORIlB6095upByDmed5xxkaCw4pHLwe3wgMP4ZODh0/arWl7sDcD6Ogk5 QFKY+raOYN+EquFOMog== X-Proofpoint-ORIG-GUID: Azs4Lpxtdhg3WPsJlslZtqUQH8ZgVcR_ X-Authority-Analysis: v=2.4 cv=DvZbOW/+ c=1 sm=1 tr=0 ts=69aad997 cx=c_pps a=rz3CxIlbcmazkYymdCej/Q==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=LtwGVnD4aPPzF9yLLxgA:9 a=QEXdDO2ut3YA:10 a=bFCP_H2QrGi7Okbo017w:22 X-Proofpoint-GUID: Azs4Lpxtdhg3WPsJlslZtqUQH8ZgVcR_ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-06_04,2026-03-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 malwarescore=0 bulkscore=0 adultscore=0 suspectscore=0 clxscore=1015 phishscore=0 priorityscore=1501 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603060131 On 3/4/2026 11:20 PM, Manivannan Sadhasivam wrote: > On Wed, Mar 04, 2026 at 05:53:10AM -0800, Can Guo wrote: >> On some platforms, HW does not support triggering TX EQTR from the most >> reliable High-Speed (HS) Gear (HS Gear1), but only allows to trigger TX >> EQTR for the target HS Gear from the same HS Gear. To work around the HW >> limitation, implement vops tx_eqtr_notify() to change Power Mode to the >> target TX EQTR HS Gear prior to TX EQTR procedure and change Power Mode >> back to HS Gear1 (the most reliable gear) post TX EQTR procedure. >> >> Signed-off-by: Can Guo >> --- >> drivers/ufs/host/ufs-qcom.c | 63 +++++++++++++++++++++++++++++++++++++ >> 1 file changed, 63 insertions(+) >> >> diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c >> index 3a9279066192..1e074058f23d 100644 >> --- a/drivers/ufs/host/ufs-qcom.c >> +++ b/drivers/ufs/host/ufs-qcom.c >> @@ -2512,6 +2512,68 @@ static u32 ufs_qcom_freq_to_gear_speed(struct ufs_hba *hba, unsigned long freq) >> return min_t(u32, gear, hba->max_pwr_info.info.gear_rx); >> } >> >> +static int ufs_qcom_change_power_mode(struct ufs_hba *hba, >> + struct ufs_pa_layer_attr *pwr_mode, >> + enum ufshcd_pmc_policy pmc_policy) >> +{ >> + int ret; >> + >> + ret = ufs_qcom_pwr_change_notify(hba, PRE_CHANGE, pwr_mode); >> + if (ret) { >> + dev_err(hba->dev, "Power change notify (PRE_CHANGE) failed: %d\n", >> + ret); >> + return ret; >> + } >> + >> + ret = ufshcd_change_power_mode(hba, pwr_mode, pmc_policy); >> + if (ret) >> + return ret; >> + >> + ufs_qcom_pwr_change_notify(hba, POST_CHANGE, pwr_mode); >> + >> + return ret; > return 0; This function should not exist, I will remove this function in next version. > >> +} >> + >> +static int ufs_qcom_tx_eqtr_notify(struct ufs_hba *hba, >> + enum ufs_notify_change_status status, >> + struct ufs_pa_layer_attr *pwr_mode) >> +{ >> + struct ufs_qcom_host *host = ufshcd_get_variant(hba); >> + struct ufs_pa_layer_attr pwr_mode_hs_g1 = { >> + .gear_rx = UFS_HS_G1, >> + .gear_tx = UFS_HS_G1, >> + .lane_rx = pwr_mode->lane_rx, >> + .lane_tx = pwr_mode->lane_tx, >> + .pwr_rx = FAST_MODE, >> + .pwr_tx = FAST_MODE, >> + .hs_rate = pwr_mode->hs_rate, >> + }; >> + u32 gear = pwr_mode->gear_tx; >> + u32 rate = pwr_mode->hs_rate; >> + int ret; >> + >> + if (host->hw_ver.major != 0x7 || host->hw_ver.minor > 0x1) >> + return 0; >> + >> + if (status == PRE_CHANGE) { >> + /* PMC to target HS Gear. */ >> + ret = ufs_qcom_change_power_mode(hba, pwr_mode, >> + UFSHCD_PMC_POLICY_DONT_FORCE); >> + if (ret) >> + dev_err(hba->dev, "%s: Failed to change power mode to target HS-G%u, Rate-%s: %d\n", > Same comment as other patch. Goes over 100 column. Will fix in next version. > >> + __func__, gear, UFS_HS_RATE_STRING(rate), ret); > Can we please not specify the function name in error log? There are too many Power Mode changes in Qualcomm's TX EQTR procedure, I want to print some hints to help pinpoint issues easier... Thanks, Can Guo. > > - Mani >