From nobody Sat Apr 4 03:20:28 2026 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 52B6129C35A; Sat, 21 Mar 2026 03:11:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.168.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774062705; cv=none; b=oDO8KWlOjnbPgRauXoFnq64Ko+ABDQsF0Xbvm+kU+gI2tZlVcwgvAuUgVxC4xgHhX4uWd3WZwx5lMHV68YSJ6a5MNOrBrpZNgmHc8ZNtM2WYbdC3ei7G9DLbOU6X2/iabrXIEFSWvbY3fwlJi9ZVxU+4EEoDgNLvwr49AduTLQU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774062705; c=relaxed/simple; bh=Y6tCo1lMqfTjCES6xkvZbJRCE7pK1S0qndH05qh3MzM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cfM4Nqeop8G4Cfhf5PH/z7cBp7WXtO12dfQr3wUtce9bDiM0O4VVTboyT2a/yjJi3xPUc0F8ryI0puZ+6C21Yi2vMP5vc8gAbAwrh0THj7VX92PVjuAsRVEU5kmD6NEMWzeRCBnFkx/DxSr3jfns4FrOmgZmy8WtIP2Kxe1kRlY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=IoNpSN9C; arc=none smtp.client-ip=205.220.168.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="IoNpSN9C" Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 62L0i0CC3207498; Sat, 21 Mar 2026 03:11:29 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:date:from:in-reply-to:message-id :mime-version:references:subject:to; s=qcppdkim1; bh=h75clx9CUo0 IEkxZI8Ucqw3PxyQALxwmpgFjLG1pj9k=; b=IoNpSN9CJCIRvDoeMpQHEiR0i8Z 5Ld6lYwZ8OcJU7w3QtuIKDnWYfCQD3sk3Zz5OBgWQRU/LIqBSqRN7iD8+8Jnb+Ut ujwG6sTMBhjPCIQJ2zS93VymcxYzOI+EfeWgMxpPwfmUFxH6+iisNGUA6bsBGCcM 8xQe7BfYxttlpMFYM0DuYLANfZPQpqSJdiiv3kfW6H4536SE/AKzseO7emXTJIMK bRIrmaS/jVVODL5HRlRgXP4EiuJFFqpxrL4OPjyhW+0sihKsdV07Wb6X3XWegjhe 6RsYQ74pbQUg4TZ0QFnENIR2kiZlDgn1KjFiALt1m0TaTMeqOSSxubtyc6A== Received: from nalasppmta05.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4d1h1e062b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 21 Mar 2026 03:11:29 +0000 (GMT) Received: from pps.filterd (NALASPPMTA05.qualcomm.com [127.0.0.1]) by NALASPPMTA05.qualcomm.com (8.18.1.2/8.18.1.2) with ESMTP id 62L3Aelp030721; Sat, 21 Mar 2026 03:11:28 GMT Received: from pps.reinject (localhost [127.0.0.1]) by NALASPPMTA05.qualcomm.com (PPS) with ESMTPS id 4d0spy9cxs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 21 Mar 2026 03:11:28 +0000 Received: from NALASPPMTA05.qualcomm.com (NALASPPMTA05.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 62L3ANoI030412; Sat, 21 Mar 2026 03:11:28 GMT Received: from hu-devc-lv-u22-c.qualcomm.com (hu-cang-lv.qualcomm.com [10.81.25.255]) by NALASPPMTA05.qualcomm.com (PPS) with ESMTPS id 62L3BStC031486 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 21 Mar 2026 03:11:28 +0000 Received: by hu-devc-lv-u22-c.qualcomm.com (Postfix, from userid 359480) id 468265A8; Fri, 20 Mar 2026 20:11:28 -0700 (PDT) From: Can Guo To: avri.altman@wdc.com, bvanassche@acm.org, beanhuo@micron.com, peter.wang@mediatek.com, martin.petersen@oracle.com, mani@kernel.org Cc: linux-scsi@vger.kernel.org, Can Guo , "James E.J. Bottomley" , linux-arm-msm@vger.kernel.org (open list:ARM/QUALCOMM MAILING LIST), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v4 08/12] scsi: ufs: ufs-qcom: Fixup PAM-4 TX L0_L1_L2_L3 adaptation pattern length Date: Fri, 20 Mar 2026 20:10:17 -0700 Message-Id: <20260321031021.1722459-9-can.guo@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260321031021.1722459-1-can.guo@oss.qualcomm.com> References: <20260321031021.1722459-1-can.guo@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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: 2nLXHRJuRr3wl7hhGSREIDpb98VizqFc X-Authority-Analysis: v=2.4 cv=epXSD4pX c=1 sm=1 tr=0 ts=69be0c61 cx=c_pps a=ouPCqIW2jiPt+lZRy3xVPw==:117 a=ouPCqIW2jiPt+lZRy3xVPw==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=EUspDBNiAAAA:8 a=ufAJUjbdAAAA:8 a=cO0rteuSJtlgQIAbmOkA:9 a=rB1ygNaI0PWiOa_UD5GD:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIxMDAyNCBTYWx0ZWRfX2lTT8EaDq1rD Sze1AT6P9BekfruKpmg/SPNdILInRc422cJip4ygVCW4uO6RfZYR7fa9sCAOBnx5Umh8RkY/QM/ LJ4imeqmz6sP6wKH1KBEAM4xse7kWOOP3PgfN6rAmHdVTC6XUiowcT0s4V4J5DdAQ69YEtOUO4Q 39wWmly2aIq+FMJDWRPAiH6lt99mDy8GvMX1VhkSX5yeHqzGQ+i2yhCJRc5En39d7L4jaSMdt9U AWFyqyBm1zgAyTqHv4CMU25DmfnEAxYa/Je8wLGE4reuoN4PZyJHuvV7Jwvn3BHM64SM4/ynj1G Cjdf/KtgApn/nLZAt2oxl+O3P5IQH9zUzZBE8G6M+RD2Bh+E7aRDX3lsewN5r52LvqASlO7DMxl Pi+ZrHpEB6fREGTGMofGngLuOVCdpr0+Kon44sXqrJiyA22Pj0WD/gXI9bB4iFP8ekI+3SBZ9Ez b96vS9nilMhOLU/2aCA== X-Proofpoint-GUID: 2nLXHRJuRr3wl7hhGSREIDpb98VizqFc 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=2026-03-21_01,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 spamscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 adultscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603210024 Content-Type: text/plain; charset="utf-8" If HS-G6 Power Mode change handshake is successful and outbound data Lanes are expected to transmit ADAPT, M-TX Lanes shall be configured as if (Adapt Type =3D=3D REFRESH) TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 =3D PA_PeerRxHsG6AdaptRefreshL0L1L2L3. else if (Adapt Type =3D=3D INITIAL) TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 =3D PA_PeerRxHsG6AdaptInitialL0L1L2L3. On some platforms, the ADAPT_L0_L1_L2_L3 duration on Host TX Lanes is only a half of theoretical ADAPT_L0_L1_L2_L3 duration TADAPT_L0_L1_L2_L3 (in PAM-4 UI) calculated from TX_HS_ADAPT_LENGTH_L0_L1_L2_L3. For such platforms, the workaround is to double the ADAPT_L0_L1_L2_L3 duration by uplifting TX_HS_ADAPT_LENGTH_L0_L1_L2_L3. UniPro initializes TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 during HS-G6 Power Mode change handshake, it would be too late for SW to update TX_HS_ADAPT_LENGTH_L0_L1_L2_L3 post HS-G6 Power Mode change. Update PA_PeerRxHsG6AdaptRefreshL0L1L2L3 and PA_PeerRxHsG6AdaptInitialL0L1L2L3 post Link Startup and before HS-G6 Power Mode change, so that the UniPro would use the updated value during HS-G6 Power Mode change handshake. Signed-off-by: Can Guo Reviewed-by: Bean Huo --- drivers/ufs/host/ufs-qcom.c | 178 ++++++++++++++++++++++++++++++++++++ 1 file changed, 178 insertions(+) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index cdc769886e82..b94fe93b830e 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -1069,10 +1069,188 @@ static void ufs_qcom_override_pa_tx_hsg1_sync_len(= struct ufs_hba *hba) dev_err(hba->dev, "Failed (%d) set PA_TX_HSG1_SYNC_LENGTH\n", err); } =20 +/** + * ufs_qcom_double_t_adapt_l0l1l2l3 - Create a new adapt that doubles the + * adaptation duration TADAPT_L0_L1_L2_L3 derived from the old adapt. + * + * @old_adapt: Original ADAPT_L0_L1_L2_L3 capability + * + * ADAPT_length_L0_L1_L2_L3 formula from M-PHY spec: + * if (ADAPT_range_L0_L1_L2_L3 =3D=3D COARSE) { + * ADAPT_length_L0_L1_L2_L3 =3D [0, 12] + * ADAPT_L0_L1_L2_L3 =3D 215 x 2^ADAPT_length_L0_L1_L2_L3 + * } else if (ADAPT_range_L0_L1_L2_L3 =3D=3D FINE) { + * ADAPT_length_L0_L1_L2_L3 =3D [0, 127] + * TADAPT_L0_L1_L2_L3 =3D 215 x (ADAPT_length_L0_L1_L2_L3 + 1) + * } + * + * To double the adaptation duration TADAPT_L0_L1_L2_L3: + * 1. If adapt range is COARSE (1'b1), new adapt =3D old adapt + 1. + * 2. If adapt range is FINE (1'b0): + * a) If old adapt length is < 64, (new adapt + 1) =3D 2 * (old adapt + = 1). + * b) If old adapt length is >=3D 64, set new adapt to 0x88 using COARSE + * range, because new adapt get from equation in a) shall exceed 127. + * + * Examples: + * ADAPT_range_L0_L1_L2_L3 | ADAPT_length_L0_L1_L2_L3 | TADAPT_L0_L1_L2_L3= (PAM-4 UI) + * 0 3 131072 + * 0 7 262144 + * 0 63 2097152 + * 0 64 2129920 + * 0 127 4194304 + * 1 8 8388608 + * 1 9 16777216 + * 1 10 33554432 + * 1 11 67108864 + * 1 12 134217728 + * + * Return: new adapt. + */ +static u32 ufs_qcom_double_t_adapt_l0l1l2l3(u32 old_adapt) +{ + u32 adapt_length =3D old_adapt & ADAPT_LENGTH_MASK; + u32 new_adapt; + + if (IS_ADAPT_RANGE_COARSE(old_adapt)) { + new_adapt =3D (adapt_length + 1) | ADAPT_RANGE_BIT; + } else { + if (adapt_length < 64) + new_adapt =3D (adapt_length << 1) + 1; + else + /* + * 0x88 is the very coarse Adapt value which is two + * times of the largest fine Adapt value (0x7F) + */ + new_adapt =3D 0x88; + } + + return new_adapt; +} + +static void ufs_qcom_limit_max_gear(struct ufs_hba *hba, + enum ufs_hs_gear_tag gear) +{ + struct ufs_qcom_host *host =3D ufshcd_get_variant(hba); + struct ufs_pa_layer_attr *pwr_info =3D &hba->max_pwr_info.info; + struct ufs_host_params *host_params =3D &host->host_params; + + host_params->hs_tx_gear =3D gear; + host_params->hs_rx_gear =3D gear; + pwr_info->gear_tx =3D gear; + pwr_info->gear_rx =3D gear; + + dev_warn(hba->dev, "Limited max gear of host and device to HS-G%d\n", gea= r); +} + +static void ufs_qcom_fixup_tx_adapt_l0l1l2l3(struct ufs_hba *hba) +{ + struct ufs_qcom_host *host =3D ufshcd_get_variant(hba); + struct ufs_pa_layer_attr *pwr_info =3D &hba->max_pwr_info.info; + struct ufs_host_params *host_params =3D &host->host_params; + u32 old_adapt, new_adapt, actual_adapt; + bool limit_speed =3D false; + int err; + + if (host->hw_ver.major !=3D 0x7 || host->hw_ver.minor > 0x1 || + host_params->hs_tx_gear <=3D UFS_HS_G5 || + pwr_info->gear_tx <=3D UFS_HS_G5) + return; + + err =3D ufshcd_dme_get(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTINITIALL0L1L2L3= ), &old_adapt); + if (err) + goto out; + + if (old_adapt > ADAPT_L0L1L2L3_LENGTH_MAX) { + dev_err(hba->dev, "PA_PeerRxHsG6AdaptInitialL0L1L2L3 value (0x%x) exceed= s MAX\n", + old_adapt); + err =3D -ERANGE; + goto out; + } + + new_adapt =3D ufs_qcom_double_t_adapt_l0l1l2l3(old_adapt); + dev_dbg(hba->dev, "Original PA_PeerRxHsG6AdaptInitialL0L1L2L3 =3D 0x%x, n= ew value =3D 0x%x\n", + old_adapt, new_adapt); + + /* + * 0x8C is the max possible value allowed by UniPro v3.0 spec, some HWs + * can accept 0x8D but some cannot. + */ + if (new_adapt <=3D ADAPT_L0L1L2L3_LENGTH_MAX || + (new_adapt =3D=3D ADAPT_L0L1L2L3_LENGTH_MAX + 1 && host->hw_ver.minor= =3D=3D 0x1)) { + err =3D ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTINITIALL0L1L2L= 3), + new_adapt); + if (err) + goto out; + + err =3D ufshcd_dme_get(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTINITIALL0L1L2L= 3), + &actual_adapt); + if (err) + goto out; + + if (actual_adapt !=3D new_adapt) { + limit_speed =3D true; + dev_warn(hba->dev, "PA_PeerRxHsG6AdaptInitialL0L1L2L3 0x%x, expect 0x%x= \n", + actual_adapt, new_adapt); + } + } else { + limit_speed =3D true; + dev_warn(hba->dev, "New PA_PeerRxHsG6AdaptInitialL0L1L2L3 (0x%x) is too = large!\n", + new_adapt); + } + + err =3D ufshcd_dme_get(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTREFRESHL0L1L2L3= ), &old_adapt); + if (err) + goto out; + + if (old_adapt > ADAPT_L0L1L2L3_LENGTH_MAX) { + dev_err(hba->dev, "PA_PeerRxHsG6AdaptRefreshL0L1L2L3 value (0x%x) exceed= s MAX\n", + old_adapt); + err =3D -ERANGE; + goto out; + } + + new_adapt =3D ufs_qcom_double_t_adapt_l0l1l2l3(old_adapt); + dev_dbg(hba->dev, "Original PA_PeerRxHsG6AdaptRefreshL0L1L2L3 =3D 0x%x, n= ew value =3D 0x%x\n", + old_adapt, new_adapt); + + /* + * 0x8C is the max possible value allowed by UniPro v3.0 spec, some HWs + * can accept 0x8D but some cannot. + */ + if (new_adapt <=3D ADAPT_L0L1L2L3_LENGTH_MAX || + (new_adapt =3D=3D ADAPT_L0L1L2L3_LENGTH_MAX + 1 && host->hw_ver.minor= =3D=3D 0x1)) { + err =3D ufshcd_dme_set(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTREFRESHL0L1L2L= 3), + new_adapt); + if (err) + goto out; + + err =3D ufshcd_dme_get(hba, UIC_ARG_MIB(PA_PEERRXHSG6ADAPTREFRESHL0L1L2L= 3), + &actual_adapt); + if (err) + goto out; + + if (actual_adapt !=3D new_adapt) { + limit_speed =3D true; + dev_warn(hba->dev, "PA_PeerRxHsG6AdaptRefreshL0L1L2L3 0x%x, expect 0x%x= \n", + new_adapt, actual_adapt); + } + } else { + limit_speed =3D true; + dev_warn(hba->dev, "New PA_PeerRxHsG6AdaptRefreshL0L1L2L3 (0x%x) is too = large!\n", + new_adapt); + } + +out: + if (limit_speed || err) + ufs_qcom_limit_max_gear(hba, UFS_HS_G5); +} + static int ufs_qcom_apply_dev_quirks(struct ufs_hba *hba) { int err =3D 0; =20 + ufs_qcom_fixup_tx_adapt_l0l1l2l3(hba); + if (hba->dev_quirks & UFS_DEVICE_QUIRK_HOST_PA_SAVECONFIGTIME) err =3D ufs_qcom_quirk_host_pa_saveconfigtime(hba); =20 --=20 2.34.1