From patchwork Mon Nov 16 10:16:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 324770 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4E5FAC4742C for ; Mon, 16 Nov 2020 10:58:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D4F6520782 for ; Mon, 16 Nov 2020 10:58:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20150623.gappssmtp.com header.i=@baylibre-com.20150623.gappssmtp.com header.b="mBcrxZHq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728806AbgKPKQ5 (ORCPT ); Mon, 16 Nov 2020 05:16:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728703AbgKPKQ5 (ORCPT ); Mon, 16 Nov 2020 05:16:57 -0500 Received: from mail-wr1-x434.google.com (mail-wr1-x434.google.com [IPv6:2a00:1450:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B3011C0613D1 for ; Mon, 16 Nov 2020 02:16:56 -0800 (PST) Received: by mail-wr1-x434.google.com with SMTP id u12so10828381wrt.0 for ; Mon, 16 Nov 2020 02:16:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jqj+wd82SY1mEpUhzqHtNGeU29Us2O77ZilRz3fNJ3M=; b=mBcrxZHqzrVqiP8+Lkhkww3v1UytB3wXlBk1VdMRXuzXC/2SmgR9/bpvObG3xJRV9x lEUB7xQh0B3yOxPCCyHvxYbH0FJA4a/e/UBM4rNXlTXHXnOi4wwbGVuZlXqgI5azEKRB iVecSzVrlSD66rbcpBJEGDNSY/GV4XN+1ypYhI5JqaEyjeUwGkyqt0QXV/XJZdmuqr0N XnFPP/wD06fx77kquV9yqx5S6GMfS89SDrYW19WjY566VZ7QVulNg64Cncc/HGkaxA8E OdZUeVCTS/jLhOLz+tuflv+8uYrMnMY/nPvgFy1KljXrCVQZpJLJC7EjLlHebstGwQPp p00Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jqj+wd82SY1mEpUhzqHtNGeU29Us2O77ZilRz3fNJ3M=; b=jOFQ3KIJRPWPfzXdVWgck4zPVrog9PY1wBPLPpN/z1CUuFG0TKPcH/ffV5t8oNptLi Y8hOCFkvRhrQRFgNypXjc2bfl5KFi0lRjnfk099v625AK35p88w7eT0+Pmin27jOHQuD 8bDfUv5r+5QkO+c/llg5F/IxKkxPEnqdeqv1nbKyrO/Cl0OtsMTI086kRidXT6+6z35i F3JmaFq3wzUILTGMkpEObqi9NysbuznrzNQFZjDWQQEwODUPAm8M1vgKJcDjEvstsRDs uRuW2kuwqzcbkYcebd5E7+rNUK7kFb4g6ngXpXOqFS2aJbj0uIcu9uKJOHhYyqo/wZ1p cI3g== X-Gm-Message-State: AOAM5326QVWmdNmSXyKfJWq6PHLhrTLx5zszHZFUdYLsU/wbuxmfVoba PtXDkCxO4kz6VutZRxJlNSIvahpNo6Xqlvly X-Google-Smtp-Source: ABdhPJzzVYdy8A+ndHtt4ursjCxT4/wyXBcOB3iw2mPmXmx/6Abv7v3El+Hq0/2lY54xhByb+FlFVQ== X-Received: by 2002:adf:9163:: with SMTP id j90mr17650311wrj.323.1605521814940; Mon, 16 Nov 2020 02:16:54 -0800 (PST) Received: from localhost.localdomain ([2a01:e35:2ec0:82b0:edb9:72a:9e35:6eb]) by smtp.gmail.com with ESMTPSA id c17sm22265131wro.19.2020.11.16.02.16.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Nov 2020 02:16:54 -0800 (PST) From: Neil Armstrong To: devicetree@vger.kernel.org, vkoul@kernel.org Cc: Neil Armstrong , linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Remi Pommarel Subject: [RESEND PATCH v3 3/3] phy: amlogic: phy-meson-axg-mipi-pcie-analog: add support for MIPI DSI analog Date: Mon, 16 Nov 2020 11:16:47 +0100 Message-Id: <20201116101647.73448-4-narmstrong@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201116101647.73448-1-narmstrong@baylibre.com> References: <20201116101647.73448-1-narmstrong@baylibre.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The AXG Analog MIPI-DSI PHY also provides functions to the PCIe PHY, thus we need to have inclusive support for both interfaces at runtime. This fixes the regmap get from parent node, removes cell param to select a mode and implement runtime configuration & power on/off for both functions since they are not exclusive. Signed-off-by: Neil Armstrong Reviewed-by: Remi Pommarel --- drivers/phy/amlogic/Kconfig | 1 + .../amlogic/phy-meson-axg-mipi-pcie-analog.c | 204 ++++++++++++------ 2 files changed, 136 insertions(+), 69 deletions(-) diff --git a/drivers/phy/amlogic/Kconfig b/drivers/phy/amlogic/Kconfig index 99e8a4c7f1f3..db5d0cd757e3 100644 --- a/drivers/phy/amlogic/Kconfig +++ b/drivers/phy/amlogic/Kconfig @@ -66,6 +66,7 @@ config PHY_MESON_AXG_MIPI_PCIE_ANALOG depends on OF && (ARCH_MESON || COMPILE_TEST) select GENERIC_PHY select REGMAP_MMIO + select GENERIC_PHY_MIPI_DPHY help Enable this to support the Meson MIPI + PCIE analog PHY found in Meson AXG SoCs. diff --git a/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c b/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c index 1431cbf885e1..6eb21551bdd9 100644 --- a/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c +++ b/drivers/phy/amlogic/phy-meson-axg-mipi-pcie-analog.c @@ -4,9 +4,13 @@ * * Copyright (C) 2019 Remi Pommarel */ +#include +#include #include #include #include +#include +#include #include #include @@ -14,10 +18,10 @@ #define HHI_MIPI_CNTL0_COMMON_BLOCK GENMASK(31, 28) #define HHI_MIPI_CNTL0_ENABLE BIT(29) #define HHI_MIPI_CNTL0_BANDGAP BIT(26) -#define HHI_MIPI_CNTL0_DECODE_TO_RTERM GENMASK(15, 12) -#define HHI_MIPI_CNTL0_OUTPUT_EN BIT(3) +#define HHI_MIPI_CNTL0_DIF_REF_CTL1 GENMASK(25, 16) +#define HHI_MIPI_CNTL0_DIF_REF_CTL0 GENMASK(15, 0) -#define HHI_MIPI_CNTL1 0x01 +#define HHI_MIPI_CNTL1 0x04 #define HHI_MIPI_CNTL1_CH0_CML_PDR_EN BIT(12) #define HHI_MIPI_CNTL1_LP_ABILITY GENMASK(5, 4) #define HHI_MIPI_CNTL1_LP_RESISTER BIT(3) @@ -25,100 +29,170 @@ #define HHI_MIPI_CNTL1_INPUT_SEL BIT(1) #define HHI_MIPI_CNTL1_PRBS7_EN BIT(0) -#define HHI_MIPI_CNTL2 0x02 +#define HHI_MIPI_CNTL2 0x08 #define HHI_MIPI_CNTL2_CH_PU GENMASK(31, 25) #define HHI_MIPI_CNTL2_CH_CTL GENMASK(24, 19) #define HHI_MIPI_CNTL2_CH0_DIGDR_EN BIT(18) #define HHI_MIPI_CNTL2_CH_DIGDR_EN BIT(17) #define HHI_MIPI_CNTL2_LPULPS_EN BIT(16) -#define HHI_MIPI_CNTL2_CH_EN(n) BIT(15 - (n)) +#define HHI_MIPI_CNTL2_CH_EN GENMASK(15, 11) #define HHI_MIPI_CNTL2_CH0_LP_CTL GENMASK(10, 1) +#define DSI_LANE_0 (1 << 4) +#define DSI_LANE_1 (1 << 3) +#define DSI_LANE_CLK (1 << 2) +#define DSI_LANE_2 (1 << 1) +#define DSI_LANE_3 (1 << 0) +#define DSI_LANE_MASK (0x1F) + struct phy_axg_mipi_pcie_analog_priv { struct phy *phy; - unsigned int mode; struct regmap *regmap; + bool dsi_configured; + bool dsi_enabled; + bool powered; + struct phy_configure_opts_mipi_dphy config; }; -static const struct regmap_config phy_axg_mipi_pcie_analog_regmap_conf = { - .reg_bits = 8, - .val_bits = 32, - .reg_stride = 4, - .max_register = HHI_MIPI_CNTL2, -}; +static void phy_bandgap_enable(struct phy_axg_mipi_pcie_analog_priv *priv) +{ + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + HHI_MIPI_CNTL0_BANDGAP, HHI_MIPI_CNTL0_BANDGAP); -static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy) + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + HHI_MIPI_CNTL0_ENABLE, HHI_MIPI_CNTL0_ENABLE); +} + +static void phy_bandgap_disable(struct phy_axg_mipi_pcie_analog_priv *priv) { - struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy); + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + HHI_MIPI_CNTL0_BANDGAP, 0); + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + HHI_MIPI_CNTL0_ENABLE, 0); +} - /* MIPI not supported yet */ - if (priv->mode != PHY_TYPE_PCIE) - return -EINVAL; +static void phy_dsi_analog_enable(struct phy_axg_mipi_pcie_analog_priv *priv) +{ + u32 reg; regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, - HHI_MIPI_CNTL0_BANDGAP, HHI_MIPI_CNTL0_BANDGAP); + HHI_MIPI_CNTL0_DIF_REF_CTL1, + FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0x1b8)); + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + BIT(31), BIT(31)); + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + HHI_MIPI_CNTL0_DIF_REF_CTL0, + FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL0, 0x8)); + + regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x001e); + + regmap_write(priv->regmap, HHI_MIPI_CNTL2, + (0x26e0 << 16) | (0x459 << 0)); + + reg = DSI_LANE_CLK; + switch (priv->config.lanes) { + case 4: + reg |= DSI_LANE_3; + fallthrough; + case 3: + reg |= DSI_LANE_2; + fallthrough; + case 2: + reg |= DSI_LANE_1; + fallthrough; + case 1: + reg |= DSI_LANE_0; + break; + default: + reg = 0; + } + + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL2, + HHI_MIPI_CNTL2_CH_EN, + FIELD_PREP(HHI_MIPI_CNTL2_CH_EN, reg)); + + priv->dsi_enabled = true; +} +static void phy_dsi_analog_disable(struct phy_axg_mipi_pcie_analog_priv *priv) +{ regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, - HHI_MIPI_CNTL0_ENABLE, HHI_MIPI_CNTL0_ENABLE); - return 0; + HHI_MIPI_CNTL0_DIF_REF_CTL1, + FIELD_PREP(HHI_MIPI_CNTL0_DIF_REF_CTL1, 0)); + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, BIT(31), 0); + regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, + HHI_MIPI_CNTL0_DIF_REF_CTL1, 0); + + regmap_write(priv->regmap, HHI_MIPI_CNTL1, 0x6); + + regmap_write(priv->regmap, HHI_MIPI_CNTL2, 0x00200000); + + priv->dsi_enabled = false; } -static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy) +static int phy_axg_mipi_pcie_analog_configure(struct phy *phy, + union phy_configure_opts *opts) { struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy); + int ret; - /* MIPI not supported yet */ - if (priv->mode != PHY_TYPE_PCIE) - return -EINVAL; + ret = phy_mipi_dphy_config_validate(&opts->mipi_dphy); + if (ret) + return ret; + + memcpy(&priv->config, opts, sizeof(priv->config)); + + priv->dsi_configured = true; + + /* If PHY was already powered on, setup the DSI analog part */ + if (priv->powered) { + /* If reconfiguring, disable & reconfigure */ + if (priv->dsi_enabled) + phy_dsi_analog_disable(priv); + + usleep_range(100, 200); + + phy_dsi_analog_enable(priv); + } - regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, - HHI_MIPI_CNTL0_BANDGAP, 0); - regmap_update_bits(priv->regmap, HHI_MIPI_CNTL0, - HHI_MIPI_CNTL0_ENABLE, 0); return 0; } -static int phy_axg_mipi_pcie_analog_init(struct phy *phy) +static int phy_axg_mipi_pcie_analog_power_on(struct phy *phy) { + struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy); + + phy_bandgap_enable(priv); + + if (priv->dsi_configured) + phy_dsi_analog_enable(priv); + + priv->powered = true; + return 0; } -static int phy_axg_mipi_pcie_analog_exit(struct phy *phy) +static int phy_axg_mipi_pcie_analog_power_off(struct phy *phy) { + struct phy_axg_mipi_pcie_analog_priv *priv = phy_get_drvdata(phy); + + phy_bandgap_disable(priv); + + if (priv->dsi_enabled) + phy_dsi_analog_disable(priv); + + priv->powered = false; + return 0; } static const struct phy_ops phy_axg_mipi_pcie_analog_ops = { - .init = phy_axg_mipi_pcie_analog_init, - .exit = phy_axg_mipi_pcie_analog_exit, + .configure = phy_axg_mipi_pcie_analog_configure, .power_on = phy_axg_mipi_pcie_analog_power_on, .power_off = phy_axg_mipi_pcie_analog_power_off, .owner = THIS_MODULE, }; -static struct phy *phy_axg_mipi_pcie_analog_xlate(struct device *dev, - struct of_phandle_args *args) -{ - struct phy_axg_mipi_pcie_analog_priv *priv = dev_get_drvdata(dev); - unsigned int mode; - - if (args->args_count != 1) { - dev_err(dev, "invalid number of arguments\n"); - return ERR_PTR(-EINVAL); - } - - mode = args->args[0]; - - /* MIPI mode is not supported yet */ - if (mode != PHY_TYPE_PCIE) { - dev_err(dev, "invalid phy mode select argument\n"); - return ERR_PTR(-EINVAL); - } - - priv->mode = mode; - return priv->phy; -} - static int phy_axg_mipi_pcie_analog_probe(struct platform_device *pdev) { struct phy_provider *phy; @@ -126,27 +200,20 @@ static int phy_axg_mipi_pcie_analog_probe(struct platform_device *pdev) struct phy_axg_mipi_pcie_analog_priv *priv; struct device_node *np = dev->of_node; struct regmap *map; - struct resource *res; - void __iomem *base; int ret; priv = devm_kmalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - base = devm_ioremap_resource(dev, res); - if (IS_ERR(base)) { - dev_err(dev, "failed to get regmap base\n"); - return PTR_ERR(base); - } - - map = devm_regmap_init_mmio(dev, base, - &phy_axg_mipi_pcie_analog_regmap_conf); + /* Get the hhi system controller node */ + map = syscon_node_to_regmap(of_get_parent(dev->of_node)); if (IS_ERR(map)) { - dev_err(dev, "failed to get HHI regmap\n"); + dev_err(dev, + "failed to get HHI regmap\n"); return PTR_ERR(map); } + priv->regmap = map; priv->phy = devm_phy_create(dev, np, &phy_axg_mipi_pcie_analog_ops); @@ -160,8 +227,7 @@ static int phy_axg_mipi_pcie_analog_probe(struct platform_device *pdev) phy_set_drvdata(priv->phy, priv); dev_set_drvdata(dev, priv); - phy = devm_of_phy_provider_register(dev, - phy_axg_mipi_pcie_analog_xlate); + phy = devm_of_phy_provider_register(dev, of_phy_simple_xlate); return PTR_ERR_OR_ZERO(phy); }