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Fri, 22 Dec 2023 05:01:47 -0800 (PST) Received: from [127.0.1.1] ([79.115.23.25]) by smtp.gmail.com with ESMTPSA id h1-20020a05600c350100b0040d3f4b1c8esm5375631wmq.36.2023.12.22.05.01.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Dec 2023 05:01:47 -0800 (PST) From: Abel Vesa Date: Fri, 22 Dec 2023 15:01:31 +0200 Subject: [PATCH v2 1/2] phy: Add Embedded DisplayPort and DisplayPort submodes MIME-Version: 1.0 Message-Id: <20231222-x1e80100-phy-edp-compatible-refactor-v2-1-ab5786c2359f@linaro.org> References: <20231222-x1e80100-phy-edp-compatible-refactor-v2-0-ab5786c2359f@linaro.org> In-Reply-To: <20231222-x1e80100-phy-edp-compatible-refactor-v2-0-ab5786c2359f@linaro.org> To: Vinod Koul , Kishon Vijay Abraham I , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Dmitry Baryshkov , Johan Hovold Cc: linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Abel Vesa X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; 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a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231222_050149_963952_6F2D0254 X-CRM114-Status: UNSURE ( 9.44 ) X-CRM114-Notice: Please train this message. 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 In some cases, a DP PHY needs to be configured to work in eDP mode. So add submodes for both DP and eDP so they can be used by the controllers for specifying the mode the PHY should be configured in. Signed-off-by: Abel Vesa --- include/linux/phy/phy-dp.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/include/linux/phy/phy-dp.h b/include/linux/phy/phy-dp.h index 18cad23642cd..9cce5766bc0b 100644 --- a/include/linux/phy/phy-dp.h +++ b/include/linux/phy/phy-dp.h @@ -8,6 +8,9 @@ #include +#define PHY_SUBMODE_DP 0 +#define PHY_SUBMODE_EDP 1 + /** * struct phy_configure_opts_dp - DisplayPort PHY configuration set * From patchwork Fri Dec 22 13:01:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Abel Vesa X-Patchwork-Id: 13503329 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 2B312C46CD8 for ; Fri, 22 Dec 2023 13:01:55 +0000 (UTC) DKIM-Signature: v=1; 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a=openpgp; fpr=6AFF162D57F4223A8770EF5AF7BF214136F41FAE X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231222_050151_565902_4A130BB2 X-CRM114-Status: GOOD ( 20.08 ) 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 Future platforms should not use different compatibles to differentiate between eDP and DP mode. Instead, they should use a single compatible as the IP block is the same. It will be the job of the controller to set the submode of the PHY accordingly. Rework the device match config data so that it only keeps the different knobs rather than swing and pre-emphasis tables. The existing platforms will remain with separate compatibles for each mode. Signed-off-by: Abel Vesa --- drivers/phy/qualcomm/phy-qcom-edp.c | 90 ++++++++++++++++++++++++++++--------- 1 file changed, 69 insertions(+), 21 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c index 8e5078304646..efd7015c73ec 100644 --- a/drivers/phy/qualcomm/phy-qcom-edp.c +++ b/drivers/phy/qualcomm/phy-qcom-edp.c @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -68,19 +69,21 @@ #define TXn_TRAN_DRVR_EMP_EN 0x0078 -struct qcom_edp_cfg { - bool is_dp; - - /* DP PHY swing and pre_emphasis tables */ +struct qcom_edp_swing_pre_emph_cfg { const u8 (*swing_hbr_rbr)[4][4]; const u8 (*swing_hbr3_hbr2)[4][4]; const u8 (*pre_emphasis_hbr_rbr)[4][4]; const u8 (*pre_emphasis_hbr3_hbr2)[4][4]; }; +struct qcom_edp_phy_cfg { + bool is_edp; + bool needs_swing_pre_emph_cfg; +}; + struct qcom_edp { struct device *dev; - const struct qcom_edp_cfg *cfg; + const struct qcom_edp_swing_pre_emph_cfg *swing_pre_emph_cfg; struct phy *phy; @@ -96,6 +99,8 @@ struct qcom_edp { struct clk_bulk_data clks[2]; struct regulator_bulk_data supplies[2]; + + bool is_edp; }; static const u8 dp_swing_hbr_rbr[4][4] = { @@ -126,8 +131,7 @@ static const u8 dp_pre_emp_hbr2_hbr3[4][4] = { { 0x04, 0xff, 0xff, 0xff } }; -static const struct qcom_edp_cfg dp_phy_cfg = { - .is_dp = true, +static const struct qcom_edp_swing_pre_emph_cfg dp_phy_swing_pre_emph_cfg = { .swing_hbr_rbr = &dp_swing_hbr_rbr, .swing_hbr3_hbr2 = &dp_swing_hbr2_hbr3, .pre_emphasis_hbr_rbr = &dp_pre_emp_hbr_rbr, @@ -162,18 +166,29 @@ static const u8 edp_pre_emp_hbr2_hbr3[4][4] = { { 0x00, 0xff, 0xff, 0xff } }; -static const struct qcom_edp_cfg edp_phy_cfg = { - .is_dp = false, +static const struct qcom_edp_swing_pre_emph_cfg edp_phy_swing_pre_emph_cfg = { .swing_hbr_rbr = &edp_swing_hbr_rbr, .swing_hbr3_hbr2 = &edp_swing_hbr2_hbr3, .pre_emphasis_hbr_rbr = &edp_pre_emp_hbr_rbr, .pre_emphasis_hbr3_hbr2 = &edp_pre_emp_hbr2_hbr3, }; +static struct qcom_edp_phy_cfg sc7280_dp_phy_cfg = { +}; + +static struct qcom_edp_phy_cfg sc8280xp_dp_phy_cfg = { + .needs_swing_pre_emph_cfg = true, +}; + +static struct qcom_edp_phy_cfg sc8280xp_edp_phy_cfg = { + .is_edp = true, + .needs_swing_pre_emph_cfg = true, +}; + static int qcom_edp_phy_init(struct phy *phy) { struct qcom_edp *edp = phy_get_drvdata(phy); - const struct qcom_edp_cfg *cfg = edp->cfg; + const struct qcom_edp_swing_pre_emph_cfg *cfg = edp->swing_pre_emph_cfg; int ret; u8 cfg8; @@ -200,7 +215,7 @@ static int qcom_edp_phy_init(struct phy *phy) DP_PHY_PD_CTL_PLL_PWRDN | DP_PHY_PD_CTL_DP_CLAMP_EN, edp->edp + DP_PHY_PD_CTL); - if (cfg && cfg->is_dp) + if (cfg && !edp->is_edp) cfg8 = 0xb7; else cfg8 = 0x37; @@ -234,7 +249,7 @@ static int qcom_edp_phy_init(struct phy *phy) static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configure_opts_dp *dp_opts) { - const struct qcom_edp_cfg *cfg = edp->cfg; + const struct qcom_edp_swing_pre_emph_cfg *cfg = edp->swing_pre_emph_cfg; unsigned int v_level = 0; unsigned int p_level = 0; u8 ldo_config; @@ -261,7 +276,7 @@ static int qcom_edp_set_voltages(struct qcom_edp *edp, const struct phy_configur if (swing == 0xff || emph == 0xff) return -EINVAL; - ldo_config = (cfg && cfg->is_dp) ? 0x1 : 0x0; + ldo_config = edp->is_edp ? 0x0 : 0x1; writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); writel(swing, edp->tx0 + TXn_TX_DRV_LVL); @@ -447,10 +462,10 @@ static int qcom_edp_set_vco_div(const struct qcom_edp *edp, unsigned long *pixel static int qcom_edp_phy_power_on(struct phy *phy) { const struct qcom_edp *edp = phy_get_drvdata(phy); - const struct qcom_edp_cfg *cfg = edp->cfg; + const struct qcom_edp_swing_pre_emph_cfg *cfg = edp->swing_pre_emph_cfg; u32 bias0_en, drvr0_en, bias1_en, drvr1_en; unsigned long pixel_freq; - u8 ldo_config; + u8 ldo_config = 0x0; int timeout; int ret; u32 val; @@ -468,7 +483,8 @@ static int qcom_edp_phy_power_on(struct phy *phy) return timeout; - ldo_config = (cfg && cfg->is_dp) ? 0x1 : 0x0; + if (cfg && !edp->is_edp) + ldo_config = 0x1; writel(ldo_config, edp->tx0 + TXn_LDO_CONFIG); writel(ldo_config, edp->tx1 + TXn_LDO_CONFIG); @@ -589,6 +605,31 @@ static int qcom_edp_phy_power_off(struct phy *phy) return 0; } +static int qcom_edp_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode) +{ + struct qcom_edp *edp = phy_get_drvdata(phy); + + if (mode != PHY_MODE_DP) + return -EINVAL; + + switch (submode) { + case PHY_SUBMODE_DP: + edp->swing_pre_emph_cfg = &dp_phy_swing_pre_emph_cfg; + edp->is_edp = false; + break; + + case PHY_SUBMODE_EDP: + edp->swing_pre_emph_cfg = &edp_phy_swing_pre_emph_cfg; + edp->is_edp = true; + break; + + default: + return -EINVAL; + } + + return 0; +} + static int qcom_edp_phy_exit(struct phy *phy) { struct qcom_edp *edp = phy_get_drvdata(phy); @@ -604,6 +645,7 @@ static const struct phy_ops qcom_edp_ops = { .configure = qcom_edp_phy_configure, .power_on = qcom_edp_phy_power_on, .power_off = qcom_edp_phy_power_off, + .set_mode = qcom_edp_phy_set_mode, .exit = qcom_edp_phy_exit, .owner = THIS_MODULE, }; @@ -770,6 +812,7 @@ static int qcom_edp_clks_register(struct qcom_edp *edp, struct device_node *np) static int qcom_edp_phy_probe(struct platform_device *pdev) { + const struct qcom_edp_phy_cfg *cfg = of_device_get_match_data(&pdev->dev); struct phy_provider *phy_provider; struct device *dev = &pdev->dev; struct qcom_edp *edp; @@ -780,7 +823,12 @@ static int qcom_edp_phy_probe(struct platform_device *pdev) return -ENOMEM; edp->dev = dev; - edp->cfg = of_device_get_match_data(&pdev->dev); + edp->is_edp = cfg->is_edp; + + if (cfg->needs_swing_pre_emph_cfg) + edp->swing_pre_emph_cfg = edp->is_edp ? + &edp_phy_swing_pre_emph_cfg : + &dp_phy_swing_pre_emph_cfg; edp->edp = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(edp->edp)) @@ -839,10 +887,10 @@ static int qcom_edp_phy_probe(struct platform_device *pdev) } static const struct of_device_id qcom_edp_phy_match_table[] = { - { .compatible = "qcom,sc7280-edp-phy" }, - { .compatible = "qcom,sc8180x-edp-phy" }, - { .compatible = "qcom,sc8280xp-dp-phy", .data = &dp_phy_cfg }, - { .compatible = "qcom,sc8280xp-edp-phy", .data = &edp_phy_cfg }, + { .compatible = "qcom,sc7280-edp-phy" , .data = &sc7280_dp_phy_cfg, }, + { .compatible = "qcom,sc8180x-edp-phy", .data = &sc7280_dp_phy_cfg, }, + { .compatible = "qcom,sc8280xp-dp-phy", .data = &sc8280xp_dp_phy_cfg, }, + { .compatible = "qcom,sc8280xp-edp-phy", .data = &sc8280xp_edp_phy_cfg, }, { } }; MODULE_DEVICE_TABLE(of, qcom_edp_phy_match_table);