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[129.46.232.65]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8b02ac7d4e6sm251899256d6.20.2026.04.26.23.35.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 26 Apr 2026 23:35:46 -0700 (PDT) From: Yongxing Mou Date: Mon, 27 Apr 2026 14:35:23 +0800 Subject: [PATCH v5 5/5] phy: qcom: edp: Add PHY-specific LDO config for eDP low vdiff MIME-Version: 1.0 Message-Id: <20260427-edp_phy-v5-5-3bb876824475@oss.qualcomm.com> References: <20260427-edp_phy-v5-0-3bb876824475@oss.qualcomm.com> In-Reply-To: <20260427-edp_phy-v5-0-3bb876824475@oss.qualcomm.com> To: Vinod Koul , Neil Armstrong , Stephen Boyd , Bjorn Andersson Cc: linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, Yongxing Mou , stable@vger.kernel.org, Dmitry Baryshkov , Konrad Dybcio X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777271722; l=7072; i=yongxing.mou@oss.qualcomm.com; s=20250910; h=from:subject:message-id; bh=UJfJbat0WxxGDDgc1J6mpbWkCUWZwu5kiHe5HC0OQjI=; b=yjUQR8Ti5SxHbjVW1hz6/RIkc1NgYL5wNokw2H+Is6pSidV1e9W2MzProOxrvWxN1W5R80J8D sDkp3K7Xz/ODozi+SKBIC2QAhnKraGBkVbjXMrQ7xNy/vB1or/J9Ghy X-Developer-Key: i=yongxing.mou@oss.qualcomm.com; a=ed25519; pk=rAy5J1eP+V7OXqH5FJ7ngMCtUrnHhut30ZTldOj52UM= X-Proofpoint-GUID: tJE4Yvg4XhRseKairv9jRjf8yfLvPBX7 X-Authority-Analysis: v=2.4 cv=H67rBeYi c=1 sm=1 tr=0 ts=69ef03c4 cx=c_pps a=wEM5vcRIz55oU/E2lInRtA==:117 a=C3Dk8TwHQYyIj7nOf9RCJw==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=YMgV9FUhrdKAYTUUvYB2:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=Wstf64DO4dhji1mrokQA:9 a=QEXdDO2ut3YA:10 a=OIgjcC2v60KrkQgK7BGD:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDI3MDA2OCBTYWx0ZWRfX0xfluW+gzX9M pEcmYPbQmHwct4PS+NdjeyhH5jxJeDkI+tzfKwOmQISlwa1OLpZD6G/dJZKuFKerr4Hkhrihhwd 3fUn6QP2pcDX0uvWZT50dpuH3vSXvtsawMiBiv07xuGCrLmOyQc7hobgxlfqw7kDcHK5zPfmuEG AxgLtTCFAe26wZdg+GEM0ezvff+8KSrrGRHBUPnVVJNYvSrxYT1XsRnBQ/B9C5jh3QAAK0mAZLD IfHYP2SrOjPxT/qbUVnhnMXdzPMAiP88HHGBjq5OyEl4FoTXjdkCMwsSluSrFy/5eiwl+t7dTdY ZA3sswOUGjv8zXYlrkWYyH5o8AP6UQkxFTptt+ILF596WdI7RKoSiglT98dlSVy2m10eYAXhzAA NKnwinFDrCpmkvvUuvezHFXIdl4xT5K7MJCpYsf/RxD/1zvLO8qPAMFJuAGOAyoSrcbMGXvREmA ba5bVzDcaalR1B1e3JA== X-Proofpoint-ORIG-GUID: tJE4Yvg4XhRseKairv9jRjf8yfLvPBX7 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=2026-04-27_01,2026-04-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 adultscore=0 suspectscore=0 phishscore=0 priorityscore=1501 spamscore=0 impostorscore=0 clxscore=1015 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604270068 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260426_233549_314373_DC4967DC X-CRM114-Status: GOOD ( 16.11 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org For eDP low vdiff, the LDO setting depends on the PHY version rather than being a simple 0x0 or 0x1 value. Introduce a PHY callback to program the correct LDO setting according to the HPG. Since SC7280/SC8180X uses different LDO settings from SA8775P/SC8280XP, introduce qcom_edp_phy_ops_v3 to keep the LDO setting correct. Cc: stable@vger.kernel.org Fixes: f199223cb490 ("phy: qcom: Introduce new eDP PHY driver") Signed-off-by: Yongxing Mou Reviewed-by: Dmitry Baryshkov Reviewed-by: Konrad Dybcio Tested-by: Konrad Dybcio # SC8280XP X13s --- drivers/phy/qualcomm/phy-qcom-edp.c | 88 ++++++++++++++++++++++++++++++++----- 1 file changed, 77 insertions(+), 11 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c index 3a848f18a8d6..a3c893f72908 100644 --- a/drivers/phy/qualcomm/phy-qcom-edp.c +++ b/drivers/phy/qualcomm/phy-qcom-edp.c @@ -81,6 +81,7 @@ struct phy_ver_ops { int (*com_clk_fwd_cfg)(const struct qcom_edp *edp); int (*com_configure_pll)(const struct qcom_edp *edp); int (*com_configure_ssc)(const struct qcom_edp *edp); + int (*com_ldo_config)(const struct qcom_edp *edp); }; struct qcom_edp_phy_cfg { @@ -352,7 +353,7 @@ static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configur const struct qcom_edp_swing_pre_emph_cfg *cfg; unsigned int v_level = 0; unsigned int p_level = 0; - u8 ldo_config; + int ret; u8 swing; u8 emph; int i; @@ -378,13 +379,13 @@ static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configur if (swing == 0xff || emph == 0xff) return -EINVAL; - ldo_config = edp->is_edp ? 0x0 : 0x1; + ret = edp->cfg->ver_ops->com_ldo_config(edp); + if (ret) + return ret; - writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); writel(swing, edp->tx0 + TXn_TX_DRV_LVL); writel(emph, edp->tx0 + TXn_TX_EMP_POST1_LVL); - writel(ldo_config, edp->tx1 + TXn_LDO_CONFIG); writel(swing, edp->tx1 + TXn_TX_DRV_LVL); writel(emph, edp->tx1 + TXn_TX_EMP_POST1_LVL); @@ -608,6 +609,52 @@ static int qcom_edp_com_configure_pll_v4(const struct qcom_edp *edp) return 0; } +static int qcom_edp_ldo_config_v3(const struct qcom_edp *edp) +{ + const struct phy_configure_opts_dp *dp_opts = &edp->dp_opts; + u32 ldo_config; + + if (!edp->is_edp) + ldo_config = 0x0; + else if (dp_opts->link_rate <= 2700) + ldo_config = 0x81; + else + ldo_config = 0x41; + + writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); + writel(dp_opts->lanes > 2 ? ldo_config : 0x00, edp->tx1 + TXn_LDO_CONFIG); + + return 0; +} + +static int qcom_edp_ldo_config_v4(const struct qcom_edp *edp) +{ + const struct phy_configure_opts_dp *dp_opts = &edp->dp_opts; + u32 ldo_config; + + if (!edp->is_edp) + ldo_config = 0x0; + else if (dp_opts->link_rate <= 2700) + ldo_config = 0xc1; + else + ldo_config = 0x81; + + writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); + writel(dp_opts->lanes > 2 ? ldo_config : 0x00, edp->tx1 + TXn_LDO_CONFIG); + + return 0; +} + +static const struct phy_ver_ops qcom_edp_phy_ops_v3 = { + .com_power_on = qcom_edp_phy_power_on_v4, + .com_resetsm_cntrl = qcom_edp_phy_com_resetsm_cntrl_v4, + .com_bias_en_clkbuflr = qcom_edp_com_bias_en_clkbuflr_v4, + .com_clk_fwd_cfg = qcom_edp_com_clk_fwd_cfg_v4, + .com_configure_pll = qcom_edp_com_configure_pll_v4, + .com_configure_ssc = qcom_edp_com_configure_ssc_v4, + .com_ldo_config = qcom_edp_ldo_config_v3, +}; + static const struct phy_ver_ops qcom_edp_phy_ops_v4 = { .com_power_on = qcom_edp_phy_power_on_v4, .com_resetsm_cntrl = qcom_edp_phy_com_resetsm_cntrl_v4, @@ -615,6 +662,7 @@ static const struct phy_ver_ops qcom_edp_phy_ops_v4 = { .com_clk_fwd_cfg = qcom_edp_com_clk_fwd_cfg_v4, .com_configure_pll = qcom_edp_com_configure_pll_v4, .com_configure_ssc = qcom_edp_com_configure_ssc_v4, + .com_ldo_config = qcom_edp_ldo_config_v4, }; static const struct qcom_edp_phy_cfg sa8775p_dp_phy_cfg = { @@ -631,7 +679,7 @@ static const struct qcom_edp_phy_cfg sc7280_dp_phy_cfg = { .vco_div_cfg = edp_phy_vco_div_cfg_v4, .dp_swing_pre_emph_cfg = &dp_phy_swing_pre_emph_cfg, .edp_swing_pre_emph_cfg = &edp_phy_swing_pre_emph_cfg_v3, - .ver_ops = &qcom_edp_phy_ops_v4, + .ver_ops = &qcom_edp_phy_ops_v3, }; static const struct qcom_edp_phy_cfg sc8180x_dp_phy_cfg = { @@ -639,7 +687,7 @@ static const struct qcom_edp_phy_cfg sc8180x_dp_phy_cfg = { .vco_div_cfg = edp_phy_vco_div_cfg_v4, .dp_swing_pre_emph_cfg = &dp_phy_swing_pre_emph_cfg_v2, .edp_swing_pre_emph_cfg = &edp_phy_swing_pre_emph_cfg_v2, - .ver_ops = &qcom_edp_phy_ops_v4, + .ver_ops = &qcom_edp_phy_ops_v3, }; static const struct qcom_edp_phy_cfg sc8280xp_dp_phy_cfg = { @@ -824,6 +872,24 @@ static int qcom_edp_com_configure_pll_v6(const struct qcom_edp *edp) return 0; } +static int qcom_edp_ldo_config_v6(const struct qcom_edp *edp) +{ + const struct phy_configure_opts_dp *dp_opts = &edp->dp_opts; + u32 ldo_config; + + if (!edp->is_edp) + ldo_config = 0x0; + else if (dp_opts->link_rate <= 2700) + ldo_config = 0x51; + else + ldo_config = 0x91; + + writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); + writel(dp_opts->lanes > 2 ? ldo_config : 0x00, edp->tx1 + TXn_LDO_CONFIG); + + return 0; +} + static const struct phy_ver_ops qcom_edp_phy_ops_v6 = { .com_power_on = qcom_edp_phy_power_on_v6, .com_resetsm_cntrl = qcom_edp_phy_com_resetsm_cntrl_v6, @@ -831,6 +897,7 @@ static const struct phy_ver_ops qcom_edp_phy_ops_v6 = { .com_clk_fwd_cfg = qcom_edp_com_clk_fwd_cfg_v4, .com_configure_pll = qcom_edp_com_configure_pll_v6, .com_configure_ssc = qcom_edp_com_configure_ssc_v6, + .com_ldo_config = qcom_edp_ldo_config_v6, }; static struct qcom_edp_phy_cfg x1e80100_phy_cfg = { @@ -1011,6 +1078,7 @@ static const struct phy_ver_ops qcom_edp_phy_ops_v8 = { .com_clk_fwd_cfg = qcom_edp_com_clk_fwd_cfg_v8, .com_configure_pll = qcom_edp_com_configure_pll_v8, .com_configure_ssc = qcom_edp_com_configure_ssc_v8, + .com_ldo_config = qcom_edp_ldo_config_v6, }; static struct qcom_edp_phy_cfg glymur_phy_cfg = { @@ -1026,7 +1094,6 @@ static int qcom_edp_phy_power_on(struct phy *phy) const struct qcom_edp *edp = phy_get_drvdata(phy); u32 bias0_en, drvr0_en, bias1_en, drvr1_en; unsigned long pixel_freq; - u8 ldo_config = 0x0; int ret; u32 val; u8 cfg1; @@ -1035,11 +1102,10 @@ static int qcom_edp_phy_power_on(struct phy *phy) if (ret) return ret; - if (edp->cfg->edp_swing_pre_emph_cfg && !edp->is_edp) - ldo_config = 0x1; + ret = edp->cfg->ver_ops->com_ldo_config(edp); + if (ret) + return ret; - writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); - writel(ldo_config, edp->tx1 + TXn_LDO_CONFIG); writel(0x00, edp->tx0 + TXn_LANE_MODE_1); writel(0x00, edp->tx1 + TXn_LANE_MODE_1); -- 2.43.0 -- linux-phy mailing list linux-phy@lists.infradead.org https://lists.infradead.org/mailman/listinfo/linux-phy