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Bottomley" , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 1/2] scsi: ufs: core: Add a quirk for extended TX EQTR Adapt L0L1L2L3 length Date: Fri, 1 May 2026 06:16:40 -0700 Message-Id: <20260501131641.826258-2-can.guo@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260501131641.826258-1-can.guo@oss.qualcomm.com> References: <20260501131641.826258-1-can.guo@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTAxMDEyOSBTYWx0ZWRfX0MghlTpMR3R1 zzfVUabQA6BogoPHhdRLj9lwQcU/0suUJUhGuo9bxaKqaAlZDoPKyc8kNT/PB2dr5fmfmaVltTB TzhLgQH2ihJ/HkbznaB6WeVeWgiA9k6G1VOlPaVDCFGLlYs9m6IR6yDoOX7f3O7HFs6U19jcnCc dgK8UnMnbtVb7pdfdl8om1JI6OkLz/MEh9sFSy1TkkYCWu6RpYxT+BAjksk7zGbW5Zx0QPJNVJW H6yCEmjllmk0tqlCNSSV9Zdo6hFaKWomCyIW16aLm0n8CYgBU4+9/2Qkey7eVth/UQEV1syj9mH CRLltx9bkfnUKXw3I452taSn1QTC07OmB4sUxr/wDtDxZQ4SB2CkNrnXKBCl0FVW7R3mTkiVWxg c4ZovwjaxhfAV+vuXUFtxr2NgMqEFULcMUN0TqQewDuQm0l+fjIj2Gx5SqHOCHh7T9SJTCAfcmW ca0H4a3woe0n4SOly1Q== X-Authority-Analysis: v=2.4 cv=Zdkt8MVA c=1 sm=1 tr=0 ts=69f4a7c6 cx=c_pps a=ouPCqIW2jiPt+lZRy3xVPw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=K_dlAwRSWhGW3_DjcLgA:9 X-Proofpoint-ORIG-GUID: riw__3Anw45-2KJWE4-45-oS1XBaeJ4L X-Proofpoint-GUID: riw__3Anw45-2KJWE4-45-oS1XBaeJ4L 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=2026-05-01_03,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 bulkscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605010129 Add a quirk to support TX Equalization Training (EQTR) using Adapt L0L1L2L3 length which is larger than what is allowed by M-PHY spec ver 6.0. Signed-off-by: Can Guo --- drivers/ufs/core/ufs-txeq.c | 8 ++++++-- include/ufs/ufshcd.h | 7 +++++++ 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/ufs/core/ufs-txeq.c b/drivers/ufs/core/ufs-txeq.c index b2dc89124353..fe647450a7a1 100644 --- a/drivers/ufs/core/ufs-txeq.c +++ b/drivers/ufs/core/ufs-txeq.c @@ -740,7 +740,9 @@ static int ufshcd_setup_tx_eqtr_adapt_length(struct ufs_hba *hba, if (adapt_l0l1l2l3_cap_local > ADAPT_L0L1L2L3_LENGTH_MAX) { dev_err(hba->dev, "local RX_HS_G%u_ADAPT_INITIAL_L0L1L2L3_CAP (0x%x) exceeds MAX\n", gear, adapt_l0l1l2l3_cap_local); - return -EINVAL; + + if (!(hba->quirks & UFSHCD_QUIRK_EXTENDED_TX_EQTR_ADAPT_LENGTH_L0L1L2L3)) + return -EINVAL; } ret = ufshcd_dme_get(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTINITIALL0L1L2L3), @@ -751,7 +753,9 @@ static int ufshcd_setup_tx_eqtr_adapt_length(struct ufs_hba *hba, if (adapt_l0l1l2l3_cap_peer > ADAPT_L0L1L2L3_LENGTH_MAX) { dev_err(hba->dev, "peer RX_HS_G%u_ADAPT_INITIAL_L0L1L2L3_CAP (0x%x) exceeds MAX\n", gear, adapt_l0l1l2l3_cap_peer); - return -EINVAL; + + if (!(hba->quirks & UFSHCD_QUIRK_EXTENDED_TX_EQTR_ADAPT_LENGTH_L0L1L2L3)) + return -EINVAL; } t_adapt_l0l1l2l3_local = adapt_cap_to_t_adapt_l0l1l2l3(adapt_l0l1l2l3_cap_local); diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index cfbc75d8df83..7a7c07636cf7 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -804,6 +804,13 @@ enum ufshcd_quirks { * delay after enabling VCC to ensure it's stable. */ UFSHCD_QUIRK_VCC_ON_DELAY = 1 << 27, + + /* + * This quirk indicates that Host supports TX Equalization Training + * (EQTR) using Adapt L0L1L2L3 length which is larger than what is + * allowed by M-PHY spec ver 6.0. + */ + UFSHCD_QUIRK_EXTENDED_TX_EQTR_ADAPT_LENGTH_L0L1L2L3 = 1 << 28, }; enum ufshcd_caps { -- 2.34.1