From patchwork Thu Aug 22 10:44:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Guido_G=C3=BCnther?= X-Patchwork-Id: 11109049 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 15339112C for ; Thu, 22 Aug 2019 10:45:06 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id DB455205ED for ; Thu, 22 Aug 2019 10:45:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="mcuzJnIh" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DB455205ED Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=sigxcpu.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5v6/5+yBG77YVP68ZYoUwBbK3+pY/NzF0sgAaPIjU1w=; b=mcuzJnIhvwNhkL cB3F+VOZteGeznbZYv3LC693aXcibvqf4oNbCAGnenIooDSnPx9mbPm1tNQmLULXP5AtM1nlrHaaA 0tM9XFwL5F+dUdz5C5TfHGBrpR3B77gYqBsvQZXeDGIEKDKpwtmtEn55aSsTy6zzS6Fn9UJb/klgG FjscUO+eHUfO8iVsCk9/76LQweaHy5y2QaH8GdsYSKYr6mDTO2Vr0WKY5k4c4ktKISQDaLceEBaKh WqmuguPssrfyxkYRdJ29b7vPsG9Na4tNMrtJgLv4GPimbVhjxRao+pNghf6ELSucZNai4wZsl2Qb+ h2ezjQyzNbDqhM6n1eIQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1i0kaX-00081O-8c; Thu, 22 Aug 2019 10:45:05 +0000 Received: from honk.sigxcpu.org ([24.134.29.49]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1i0kZx-0007GU-As for linux-arm-kernel@lists.infradead.org; Thu, 22 Aug 2019 10:44:34 +0000 Received: from localhost (localhost [127.0.0.1]) by honk.sigxcpu.org (Postfix) with ESMTP id E3723FB02; Thu, 22 Aug 2019 12:44:27 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at honk.sigxcpu.org Received: from honk.sigxcpu.org ([127.0.0.1]) by localhost (honk.sigxcpu.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qR7CdQ25IUkd; Thu, 22 Aug 2019 12:44:19 +0200 (CEST) Received: by bogon.sigxcpu.org (Postfix, from userid 1000) id B25994017B; Thu, 22 Aug 2019 12:44:16 +0200 (CEST) From: =?utf-8?q?Guido_G=C3=BCnther?= To: David Airlie , Daniel Vetter , Rob Herring , Mark Rutland , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Lee Jones , =?utf-8?q?Guido_G=C3=BCnther?= , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Robert Chiras , Sam Ravnborg , Arnd Bergmann Subject: [PATCH v3 2/2] drm/bridge: Add NWL MIPI DSI host controller support Date: Thu, 22 Aug 2019 12:44:16 +0200 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190822_034429_920380_EB41EF61 X-CRM114-Status: GOOD ( 22.66 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [24.134.29.49 listed in list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 SPF_NONE SPF: sender does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This adds initial support for the NWL MIPI DSI Host controller found on i.MX8 SoCs. It adds support for the i.MX8MQ but the same IP can be found on e.g. the i.MX8QXP. It has been tested on the Librem 5 devkit using mxsfb. Signed-off-by: Guido Günther Co-developed-by: Robert Chiras Signed-off-by: Robert Chiras --- drivers/gpu/drm/bridge/Kconfig | 2 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/nwl-dsi/Kconfig | 16 + drivers/gpu/drm/bridge/nwl-dsi/Makefile | 4 + drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c | 501 ++++++++++++++++ drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h | 65 +++ drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c | 700 +++++++++++++++++++++++ drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.h | 112 ++++ 8 files changed, 1401 insertions(+) create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/Kconfig create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/Makefile create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c create mode 100644 drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.h diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 1cc9f502c1f2..7980b5c2156f 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -154,6 +154,8 @@ source "drivers/gpu/drm/bridge/analogix/Kconfig" source "drivers/gpu/drm/bridge/adv7511/Kconfig" +source "drivers/gpu/drm/bridge/nwl-dsi/Kconfig" + source "drivers/gpu/drm/bridge/synopsys/Kconfig" endmenu diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 4934fcf5a6f8..d9f6c0f77592 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -16,4 +16,5 @@ obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/ obj-$(CONFIG_DRM_I2C_ADV7511) += adv7511/ obj-$(CONFIG_DRM_TI_SN65DSI86) += ti-sn65dsi86.o obj-$(CONFIG_DRM_TI_TFP410) += ti-tfp410.o +obj-$(CONFIG_DRM_NWL_MIPI_DSI) += nwl-dsi/ obj-y += synopsys/ diff --git a/drivers/gpu/drm/bridge/nwl-dsi/Kconfig b/drivers/gpu/drm/bridge/nwl-dsi/Kconfig new file mode 100644 index 000000000000..3b157a9f2229 --- /dev/null +++ b/drivers/gpu/drm/bridge/nwl-dsi/Kconfig @@ -0,0 +1,16 @@ +config DRM_NWL_MIPI_DSI + tristate "Support for Northwest Logic MIPI DSI Host controller" + depends on DRM + depends on COMMON_CLK + depends on OF && HAS_IOMEM + select DRM_KMS_HELPER + select DRM_MIPI_DSI + select DRM_PANEL_BRIDGE + select GENERIC_PHY_MIPI_DPHY + select MFD_SYSCON + select MULTIPLEXER + select REGMAP_MMIO + help + This enables the Northwest Logic MIPI DSI Host controller as + for example found on NXP's i.MX8 Processors. + diff --git a/drivers/gpu/drm/bridge/nwl-dsi/Makefile b/drivers/gpu/drm/bridge/nwl-dsi/Makefile new file mode 100644 index 000000000000..804baf2f1916 --- /dev/null +++ b/drivers/gpu/drm/bridge/nwl-dsi/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0 +nwl-mipi-dsi-y := nwl-drv.o nwl-dsi.o +obj-$(CONFIG_DRM_NWL_MIPI_DSI) += nwl-mipi-dsi.o +header-test-y += nwl-drv.h nwl-dsi.h diff --git a/drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c b/drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c new file mode 100644 index 000000000000..e457438738c0 --- /dev/null +++ b/drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.c @@ -0,0 +1,501 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * i.MX8 NWL MIPI DSI host driver + * + * Copyright (C) 2017 NXP + * Copyright (C) 2019 Purism SPC + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "nwl-drv.h" +#include "nwl-dsi.h" + +#define DRV_NAME "nwl-dsi" + +/* Possible platform specific clocks */ +#define NWL_DSI_CLK_CORE "core" + +static const struct regmap_config nwl_dsi_regmap_config = { + .reg_bits = 16, + .val_bits = 32, + .reg_stride = 4, + .max_register = NWL_DSI_IRQ_MASK2, + .name = DRV_NAME, +}; + +struct nwl_dsi_platform_data { + int (*poweron)(struct nwl_dsi *dsi); + int (*poweroff)(struct nwl_dsi *dsi); + int (*select_input)(struct nwl_dsi *dsi); + int (*deselect_input)(struct nwl_dsi *dsi); + struct nwl_dsi_plat_clk_config clk_config[NWL_DSI_MAX_PLATFORM_CLOCKS]; +}; + +static inline struct nwl_dsi *bridge_to_dsi(struct drm_bridge *bridge) +{ + return container_of(bridge, struct nwl_dsi, bridge); +} + +static int nwl_dsi_set_platform_clocks(struct nwl_dsi *dsi, bool enable) +{ + struct device *dev = dsi->dev; + const char *id; + struct clk *clk; + size_t i; + unsigned long rate; + int ret, result = 0; + + DRM_DEV_DEBUG_DRIVER(dev, "%s platform clocks\n", + enable ? "enabling" : "disabling"); + for (i = 0; i < ARRAY_SIZE(dsi->pdata->clk_config); i++) { + if (!dsi->clk_config[i].present) + continue; + id = dsi->clk_config[i].id; + clk = dsi->clk_config[i].clk; + + if (enable) { + ret = clk_prepare_enable(clk); + if (ret < 0) { + DRM_DEV_ERROR(dev, + "Failed to enable %s clk: %d\n", + id, ret); + result = result ?: ret; + } + rate = clk_get_rate(clk); + DRM_DEV_DEBUG_DRIVER(dev, "Enabled %s clk @%lu Hz\n", + id, rate); + } else { + clk_disable_unprepare(clk); + DRM_DEV_DEBUG_DRIVER(dev, "Disabled %s clk\n", id); + } + } + + return result; +} + +static int nwl_dsi_plat_enable(struct nwl_dsi *dsi) +{ + struct device *dev = dsi->dev; + int ret; + + if (dsi->pdata->select_input) + dsi->pdata->select_input(dsi); + + ret = nwl_dsi_set_platform_clocks(dsi, true); + if (ret < 0) + return ret; + + ret = dsi->pdata->poweron(dsi); + if (ret < 0) + DRM_DEV_ERROR(dev, "Failed to power on DSI: %d\n", ret); + return ret; +} + +static void nwl_dsi_plat_disable(struct nwl_dsi *dsi) +{ + dsi->pdata->poweroff(dsi); + nwl_dsi_set_platform_clocks(dsi, false); + if (dsi->pdata->deselect_input) + dsi->pdata->deselect_input(dsi); +} + +static void nwl_dsi_bridge_disable(struct drm_bridge *bridge) +{ + struct nwl_dsi *dsi = bridge_to_dsi(bridge); + + nwl_dsi_disable(dsi); + nwl_dsi_plat_disable(dsi); + pm_runtime_put(dsi->dev); +} + +static int nwl_dsi_get_dphy_params(struct nwl_dsi *dsi, + const struct drm_display_mode *mode, + union phy_configure_opts *phy_opts) +{ + unsigned long rate; + int ret; + + if (dsi->lanes < 1 || dsi->lanes > 4) + return -EINVAL; + + /* + * So far the DPHY spec minimal timings work for both mixel + * dphy and nwl dsi host + */ + ret = phy_mipi_dphy_get_default_config( + mode->crtc_clock * 1000, + mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes, + &phy_opts->mipi_dphy); + if (ret < 0) + return ret; + + rate = clk_get_rate(dsi->tx_esc_clk); + DRM_DEV_DEBUG_DRIVER(dsi->dev, "LP clk is @%lu Hz\n", rate); + phy_opts->mipi_dphy.lp_clk_rate = rate; + + return 0; +} + +static bool nwl_dsi_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + /* At least LCDIF + NWL needs active high sync */ + adjusted_mode->flags |= (DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC); + adjusted_mode->flags &= ~(DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC); + + return true; +} + +static enum drm_mode_status +nwl_dsi_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_mode *mode) +{ + struct nwl_dsi *dsi = bridge_to_dsi(bridge); + int bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); + + if (mode->clock * bpp > 15000000) + return MODE_CLOCK_HIGH; + + if (mode->clock * bpp < 80000) + return MODE_CLOCK_LOW; + + return MODE_OK; +} + +static void +nwl_dsi_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct nwl_dsi *dsi = bridge_to_dsi(bridge); + struct device *dev = dsi->dev; + union phy_configure_opts new_cfg; + unsigned long phy_ref_rate; + int ret; + + ret = nwl_dsi_get_dphy_params(dsi, adjusted_mode, &new_cfg); + if (ret < 0) + return; + + /* + * If hs clock is unchanged, we're all good - all parameters are + * derived from it atm. + */ + if (new_cfg.mipi_dphy.hs_clk_rate == dsi->phy_cfg.mipi_dphy.hs_clk_rate) + return; + + phy_ref_rate = clk_get_rate(dsi->phy_ref_clk); + DRM_DEV_DEBUG_DRIVER(dev, "PHY at ref rate: %lu\n", phy_ref_rate); + /* Save the new desired phy config */ + memcpy(&dsi->phy_cfg, &new_cfg, sizeof(new_cfg)); + + memcpy(&dsi->mode, adjusted_mode, sizeof(dsi->mode)); + drm_mode_debug_printmodeline(adjusted_mode); +} + +static void nwl_dsi_bridge_pre_enable(struct drm_bridge *bridge) +{ + struct nwl_dsi *dsi = bridge_to_dsi(bridge); + + pm_runtime_get_sync(dsi->dev); + nwl_dsi_plat_enable(dsi); + nwl_dsi_enable(dsi); +} + +static int nwl_dsi_bridge_attach(struct drm_bridge *bridge) +{ + struct nwl_dsi *dsi = bridge->driver_private; + + return drm_bridge_attach(bridge->encoder, dsi->panel_bridge, bridge); +} + +static const struct drm_bridge_funcs nwl_dsi_bridge_funcs = { + .pre_enable = nwl_dsi_bridge_pre_enable, + .disable = nwl_dsi_bridge_disable, + .mode_fixup = nwl_dsi_bridge_mode_fixup, + .mode_set = nwl_dsi_bridge_mode_set, + .mode_valid = nwl_dsi_bridge_mode_valid, + .attach = nwl_dsi_bridge_attach, +}; + +static int nwl_dsi_parse_dt(struct nwl_dsi *dsi) +{ + struct platform_device *pdev = to_platform_device(dsi->dev); + struct clk *clk; + const char *clk_id; + void __iomem *base; + int i, ret; + + dsi->phy = devm_phy_get(dsi->dev, "dphy"); + if (IS_ERR(dsi->phy)) { + ret = PTR_ERR(dsi->phy); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dsi->dev, "Could not get PHY: %d\n", ret); + return ret; + } + + /* Platform dependent clocks */ + memcpy(dsi->clk_config, dsi->pdata->clk_config, + sizeof(dsi->pdata->clk_config)); + + for (i = 0; i < ARRAY_SIZE(dsi->pdata->clk_config); i++) { + if (!dsi->clk_config[i].present) + continue; + + clk_id = dsi->clk_config[i].id; + clk = devm_clk_get(dsi->dev, clk_id); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + DRM_DEV_ERROR(dsi->dev, "Failed to get %s clock: %d\n", + clk_id, ret); + return ret; + } + DRM_DEV_DEBUG_DRIVER(dsi->dev, "Setup clk %s (rate: %lu)\n", + clk_id, clk_get_rate(clk)); + dsi->clk_config[i].clk = clk; + } + + /* DSI clocks */ + clk = devm_clk_get(dsi->dev, "phy_ref"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + DRM_DEV_ERROR(dsi->dev, "Failed to get phy_ref clock: %d\n", + ret); + return ret; + } + dsi->phy_ref_clk = clk; + + clk = devm_clk_get(dsi->dev, "rx_esc"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + DRM_DEV_ERROR(dsi->dev, "Failed to get rx_esc clock: %d\n", + ret); + return ret; + } + dsi->rx_esc_clk = clk; + + clk = devm_clk_get(dsi->dev, "tx_esc"); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + DRM_DEV_ERROR(dsi->dev, "Failed to get tx_esc clock: %d\n", + ret); + return ret; + } + dsi->tx_esc_clk = clk; + + dsi->mux = devm_mux_control_get(dsi->dev, NULL); + if (IS_ERR(dsi->mux)) { + ret = PTR_ERR(dsi->mux); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dsi->dev, "Failed to get mux: %d\n", ret); + return ret; + } + + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) + return PTR_ERR(base); + + dsi->regmap = + devm_regmap_init_mmio(dsi->dev, base, &nwl_dsi_regmap_config); + if (IS_ERR(dsi->regmap)) { + ret = PTR_ERR(dsi->regmap); + DRM_DEV_ERROR(dsi->dev, "Failed to create NWL DSI regmap: %d\n", + ret); + return ret; + } + + dsi->irq = platform_get_irq(pdev, 0); + if (dsi->irq < 0) { + DRM_DEV_ERROR(dsi->dev, "Failed to get device IRQ: %d\n", + dsi->irq); + return dsi->irq; + } + + dsi->rstc = devm_reset_control_array_get(dsi->dev, false, true); + if (IS_ERR(dsi->rstc)) { + DRM_DEV_ERROR(dsi->dev, "Failed to get resets: %ld\n", + PTR_ERR(dsi->rstc)); + return PTR_ERR(dsi->rstc); + } + + return 0; +} + +static int imx8mq_dsi_select_input(struct nwl_dsi *dsi) +{ + struct device_node *remote; + u32 use_dcss = 1; + int ret; + + remote = of_graph_get_remote_node(dsi->dev->of_node, 0, 0); + if (strcmp(remote->name, "lcdif") == 0) + use_dcss = 0; + + DRM_DEV_INFO(dsi->dev, "Using %s as input source\n", + (use_dcss) ? "DCSS" : "LCDIF"); + + ret = mux_control_try_select(dsi->mux, use_dcss); + if (ret < 0) + DRM_DEV_ERROR(dsi->dev, "Failed to select input: %d\n", ret); + + of_node_put(remote); + return ret; +} + + +static int imx8mq_dsi_deselect_input(struct nwl_dsi *dsi) +{ + int ret; + + ret = mux_control_deselect(dsi->mux); + if (ret < 0) + DRM_DEV_ERROR(dsi->dev, "Failed to deselect input: %d\n", ret); + + return ret; +} + + +static int imx8mq_dsi_poweron(struct nwl_dsi *dsi) +{ + int ret = 0; + + /* otherwise the display stays blank */ + usleep_range(200, 300); + + if (dsi->rstc) + ret = reset_control_deassert(dsi->rstc); + + return ret; +} + +static int imx8mq_dsi_poweroff(struct nwl_dsi *dsi) +{ + int ret = 0; + + if (dsi->quirks & SRC_RESET_QUIRK) + return 0; + + if (dsi->rstc) + ret = reset_control_assert(dsi->rstc); + return ret; +} + +static const struct drm_bridge_timings nwl_dsi_timings = { + .input_bus_flags = DRM_BUS_FLAG_DE_LOW, +}; + +static const struct nwl_dsi_platform_data imx8mq_dev = { + .poweron = &imx8mq_dsi_poweron, + .poweroff = &imx8mq_dsi_poweroff, + .select_input = &imx8mq_dsi_select_input, + .deselect_input = &imx8mq_dsi_deselect_input, + .clk_config = { + { .id = NWL_DSI_CLK_CORE, .present = true }, + }, +}; + +static const struct of_device_id nwl_dsi_dt_ids[] = { + { .compatible = "fsl,imx8mq-nwl-dsi", .data = &imx8mq_dev, }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, nwl_dsi_dt_ids); + +static const struct soc_device_attribute nwl_dsi_quirks_match[] = { + { .soc_id = "i.MX8MQ", .revision = "2.0", + .data = (void *)(E11418_HS_MODE_QUIRK | SRC_RESET_QUIRK) }, + { /* sentinel. */ }, +}; + +static int nwl_dsi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + const struct of_device_id *of_id = of_match_device(nwl_dsi_dt_ids, dev); + const struct nwl_dsi_platform_data *pdata = of_id->data; + const struct soc_device_attribute *attr; + struct nwl_dsi *dsi; + int ret; + + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); + if (!dsi) + return -ENOMEM; + + dsi->dev = dev; + dsi->pdata = pdata; + + ret = nwl_dsi_parse_dt(dsi); + if (ret) + return ret; + + ret = devm_request_irq(dev, dsi->irq, nwl_dsi_irq_handler, 0, + dev_name(dev), dsi); + if (ret < 0) { + DRM_DEV_ERROR(dev, "Failed to request IRQ %d: %d\n", dsi->irq, + ret); + return ret; + } + + dsi->dsi_host.ops = &nwl_dsi_host_ops; + dsi->dsi_host.dev = dev; + ret = mipi_dsi_host_register(&dsi->dsi_host); + if (ret) { + DRM_DEV_ERROR(dev, "Failed to register MIPI host: %d\n", ret); + return ret; + } + + attr = soc_device_match(nwl_dsi_quirks_match); + if (attr) + dsi->quirks = (uintptr_t)attr->data; + + dsi->bridge.driver_private = dsi; + dsi->bridge.funcs = &nwl_dsi_bridge_funcs; + dsi->bridge.of_node = dev->of_node; + dsi->bridge.timings = &nwl_dsi_timings; + + drm_bridge_add(&dsi->bridge); + + dev_set_drvdata(dev, dsi); + pm_runtime_enable(dev); + return 0; +} + +static int nwl_dsi_remove(struct platform_device *pdev) +{ + struct nwl_dsi *dsi = platform_get_drvdata(pdev); + + mipi_dsi_host_unregister(&dsi->dsi_host); + pm_runtime_disable(&pdev->dev); + return 0; +} + +static struct platform_driver nwl_dsi_driver = { + .probe = nwl_dsi_probe, + .remove = nwl_dsi_remove, + .driver = { + .of_match_table = nwl_dsi_dt_ids, + .name = DRV_NAME, + }, +}; + +module_platform_driver(nwl_dsi_driver); + +MODULE_AUTHOR("NXP Semiconductor"); +MODULE_AUTHOR("Purism SPC"); +MODULE_DESCRIPTION("Northwest Logic MIPI-DSI driver"); +MODULE_LICENSE("GPL"); /* GPLv2 or later */ diff --git a/drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h b/drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h new file mode 100644 index 000000000000..1e72a9221401 --- /dev/null +++ b/drivers/gpu/drm/bridge/nwl-dsi/nwl-drv.h @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * NWL MIPI DSI host driver + * + * Copyright (C) 2017 NXP + * Copyright (C) 2019 Purism SPC + */ + +#ifndef __NWL_DRV_H__ +#define __NWL_DRV_H__ + +#include +#include + +#include +#include + +struct nwl_dsi_platform_data; + +/* i.MX8 NWL quirks */ +/* i.MX8MQ errata E11418 */ +#define E11418_HS_MODE_QUIRK BIT(0) +/* Skip DSI bits in SRC on disable to avoid blank display on enable */ +#define SRC_RESET_QUIRK BIT(1) + +#define NWL_DSI_MAX_PLATFORM_CLOCKS 1 +struct nwl_dsi_plat_clk_config { + const char *id; + struct clk *clk; + bool present; +}; + +struct nwl_dsi { + struct drm_bridge bridge; + struct mipi_dsi_host dsi_host; + struct drm_bridge *panel_bridge; + struct device *dev; + struct phy *phy; + union phy_configure_opts phy_cfg; + unsigned int quirks; + + struct regmap *regmap; + int irq; + struct reset_control *rstc; + struct mux_control *mux; + + /* DSI clocks */ + struct clk *phy_ref_clk; + struct clk *rx_esc_clk; + struct clk *tx_esc_clk; + /* Platform dependent clocks */ + struct nwl_dsi_plat_clk_config clk_config[NWL_DSI_MAX_PLATFORM_CLOCKS]; + + /* dsi lanes */ + u32 lanes; + enum mipi_dsi_pixel_format format; + struct drm_display_mode mode; + unsigned long dsi_mode_flags; + + struct nwl_dsi_transfer *xfer; + + const struct nwl_dsi_platform_data *pdata; +}; + +#endif /* __NWL_DRV_H__ */ diff --git a/drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c new file mode 100644 index 000000000000..fd030af55bb4 --- /dev/null +++ b/drivers/gpu/drm/bridge/nwl-dsi/nwl-dsi.c @@ -0,0 +1,700 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * NWL MIPI DSI host driver + * + * Copyright (C) 2017 NXP + * Copyright (C) 2019 Purism SPC + */ + +#include +#include +#include +#include +#include + +#include