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Wed, 31 Dec 2014 01:20:12 -0700 From: Liu Ying To: Subject: [PATCH RFC v8 14/21] drm: imx: Support Synopsys DesignWare MIPI DSI host controller Date: Wed, 31 Dec 2014 16:23:32 +0800 Message-ID: <1420014219-915-15-git-send-email-Ying.Liu@freescale.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1420014219-915-1-git-send-email-Ying.Liu@freescale.com> References: <1420014219-915-1-git-send-email-Ying.Liu@freescale.com> X-EOPAttributedMessage: 0 Received-SPF: Fail (protection.outlook.com: domain of freescale.com does not designate 192.88.158.2 as permitted sender) receiver=protection.outlook.com; client-ip=192.88.158.2; helo=az84smr01.freescale.net; Authentication-Results: spf=fail (sender IP is 192.88.158.2) smtp.mailfrom=Ying.Liu@freescale.com; X-Forefront-Antispam-Report: CIP:192.88.158.2; CTRY:US; IPV:NLI; EFV:NLI; SFV:NSPM; SFS:(10019020)(6009001)(339900001)(199003)(189002)(92566001)(47776003)(110136001)(2351001)(31966008)(21056001)(77156002)(76176999)(104016003)(87936001)(107046002)(50226001)(106466001)(81156004)(62966003)(229853001)(575784001)(64706001)(19580395003)(46102003)(4396001)(20776003)(48376002)(69596002)(97736003)(50986999)(6806004)(36756003)(89996001)(19580405001)(86362001)(68736005)(50466002)(84676001)(77096005)(99396003)(2950100001)(85426001)(120916001)(2004002)(217873001); DIR:OUT; SFP:1102; SCL:1; SRVR:BY2PR0301MB0630; H:az84smr01.freescale.net; FPR:; SPF:Fail; MLV:sfv; PTR:InfoDomainNonexistent; A:1; MX:1; LANG:en; MIME-Version: 1.0 X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BY2PR0301MB0630; X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(601004); SRVR:BY2PR0301MB0630; X-Forefront-PRVS: 0442E569BC X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:; SRVR:BY2PR0301MB0630; X-OriginatorOrg: freescale.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Dec 2014 08:20:16.9519 (UTC) X-MS-Exchange-CrossTenant-Id: 710a03f5-10f6-4d38-9ff4-a80b81da590d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=710a03f5-10f6-4d38-9ff4-a80b81da590d; Ip=[192.88.158.2] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY2PR0301MB0630 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20141231_002041_535815_E02A9D90 X-CRM114-Status: GOOD ( 17.08 ) X-Spam-Score: -0.0 (/) Cc: stefan.wahren@i2se.com, devicetree@vger.kernel.org, linux@arm.linux.org.uk, kernel@pengutronix.de, airlied@linux.ie, linux-kernel@vger.kernel.org, a.hajda@samsung.com, thierry.reding@gmail.com, p.zabel@pengutronix.de, mturquette@linaro.org, shawn.guo@linaro.org, linux-arm-kernel@lists.infradead.org, andyshrk@gmail.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 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 X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for Synopsys DesignWare MIPI DSI host controller which is embedded in the i.MX6q/sdl SoCs. Signed-off-by: Liu Ying --- v7->v8: * None. v6->v7: * None. v5->v6: * Make the checkpatch.pl script be happier. v4->v5: * None. v3->v4: * Move the relevant dt-bindings to a separate patch to address Stefan Wahren's comment. v2->v3: * To address Andy Yan's comments, move the common Synopsys DesignWare MIPI DSI host controller logic into it's drm/bridge driver and leave the i.MX specific logic only. v1->v2: * Address almost all comments from Thierry Reding and Russell. * Update the DT documentation to remove the display-timings node in the panel node. * Update the DT documentation to state that the nodes which represent the possible DRM CRTCs the controller may connect with should be placed in the node "ports". * Remove the flag 'enabled' from the struct imx_mipi_dsi. * Move the format_to_bpp() function in v1 to the common DRM MIPI DSI driver. * Improve the way we wait for check status for DPHY and command packet transfer. * Improve the DPMS support for the encoder. * Split the functions of ->host_attach() and ->mode_valid() clearly as suggested by Thierry Reding. * Improve the logics in imx_mipi_dsi_dcs_long_write(). * Enable/disable the pllref_clk and pllref_gate_clk at the component binding/unbinding stages to help remove the flag 'enabled'. * Update the module license to be "GPL". * Other minor changes, such as coding style issues and macro naming issues. drivers/gpu/drm/imx/Kconfig | 7 ++ drivers/gpu/drm/imx/Makefile | 1 + drivers/gpu/drm/imx/dw_mipi_dsi-imx.c | 230 ++++++++++++++++++++++++++++++++++ 3 files changed, 238 insertions(+) create mode 100644 drivers/gpu/drm/imx/dw_mipi_dsi-imx.c diff --git a/drivers/gpu/drm/imx/Kconfig b/drivers/gpu/drm/imx/Kconfig index 82fb758..c576f6b 100644 --- a/drivers/gpu/drm/imx/Kconfig +++ b/drivers/gpu/drm/imx/Kconfig @@ -51,3 +51,10 @@ config DRM_IMX_HDMI depends on DRM_IMX help Choose this if you want to use HDMI on i.MX6. + +config DRM_IMX_MIPI_DSI + tristate "Freescale i.MX DRM MIPI DSI" + select DRM_DW_MIPI_DSI + depends on DRM_IMX + help + Choose this if you want to use MIPI DSI on i.MX6. diff --git a/drivers/gpu/drm/imx/Makefile b/drivers/gpu/drm/imx/Makefile index 582c438..f0dc278 100644 --- a/drivers/gpu/drm/imx/Makefile +++ b/drivers/gpu/drm/imx/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o imx-ipuv3-crtc-objs := ipuv3-crtc.o ipuv3-plane.o obj-$(CONFIG_DRM_IMX_IPUV3) += imx-ipuv3-crtc.o obj-$(CONFIG_DRM_IMX_HDMI) += imx-hdmi.o +obj-$(CONFIG_DRM_IMX_MIPI_DSI) += dw_mipi_dsi-imx.o diff --git a/drivers/gpu/drm/imx/dw_mipi_dsi-imx.c b/drivers/gpu/drm/imx/dw_mipi_dsi-imx.c new file mode 100644 index 0000000..b2c96e2 --- /dev/null +++ b/drivers/gpu/drm/imx/dw_mipi_dsi-imx.c @@ -0,0 +1,230 @@ +/* + * i.MX drm driver - MIPI DSI Host Controller + * + * Copyright (C) 2011-2014 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "imx-drm.h" + +#define DRIVER_NAME "imx-mipi-dsi" + +struct imx_mipi_dsi { + struct drm_encoder encoder; + struct device *dev; + struct regmap *regmap; +}; + +static inline struct imx_mipi_dsi *enc_to_dsi(struct drm_encoder *enc) +{ + return container_of(enc, struct imx_mipi_dsi, encoder); +} + +static void imx_mipi_dsi_set_ipu_di_mux(struct imx_mipi_dsi *dsi, int ipu_di) +{ + regmap_update_bits(dsi->regmap, IOMUXC_GPR3, + IMX6Q_GPR3_MIPI_MUX_CTL_MASK, + ipu_di << IMX6Q_GPR3_MIPI_MUX_CTL_SHIFT); +} + +static struct drm_encoder_funcs imx_mipi_dsi_encoder_funcs = { + .destroy = imx_drm_encoder_destroy, +}; + +static bool imx_mipi_dsi_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void imx_mipi_dsi_encoder_prepare(struct drm_encoder *encoder) +{ + u32 encoder_pix_fmt, interface_pix_fmt; + + encoder_pix_fmt = dw_mipi_dsi_get_encoder_pixel_format(encoder); + + switch (encoder_pix_fmt) { + case MIPI_DSI_FMT_RGB888: + interface_pix_fmt = V4L2_PIX_FMT_RGB24; + break; + case MIPI_DSI_FMT_RGB565: + interface_pix_fmt = V4L2_PIX_FMT_RGB565; + break; + default: + BUG(); + return; + } + + imx_drm_panel_format(encoder, interface_pix_fmt); +} + +static void imx_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ +} + +static void imx_mipi_dsi_encoder_commit(struct drm_encoder *encoder) +{ + struct imx_mipi_dsi *dsi = enc_to_dsi(encoder); + int mux = imx_drm_encoder_get_mux_id(dsi->dev->of_node, encoder); + + imx_mipi_dsi_set_ipu_di_mux(dsi, mux); +} + +static void imx_mipi_dsi_encoder_disable(struct drm_encoder *encoder) +{ +} + +static struct drm_encoder_helper_funcs imx_mipi_dsi_encoder_helper_funcs = { + .mode_fixup = imx_mipi_dsi_encoder_mode_fixup, + .prepare = imx_mipi_dsi_encoder_prepare, + .mode_set = imx_mipi_dsi_encoder_mode_set, + .commit = imx_mipi_dsi_encoder_commit, + .disable = imx_mipi_dsi_encoder_disable, +}; + +static int imx_mipi_dsi_register(struct drm_device *drm, + struct imx_mipi_dsi *dsi) +{ + int ret; + + ret = imx_drm_encoder_parse_of(drm, &dsi->encoder, dsi->dev->of_node); + if (ret) + return ret; + + drm_encoder_helper_add(&dsi->encoder, + &imx_mipi_dsi_encoder_helper_funcs); + drm_encoder_init(drm, &dsi->encoder, &imx_mipi_dsi_encoder_funcs, + DRM_MODE_ENCODER_DSI); + return 0; +} + +static enum drm_mode_status imx_mipi_dsi_mode_valid( + struct drm_connector *connector, + struct drm_display_mode *mode) +{ + /* + * The VID_PKT_SIZE field in the DSI_VID_PKT_CFG + * register is 11-bit. + */ + if (mode->hdisplay > 0x7ff) + return MODE_BAD_HVALUE; + + /* + * The V_ACTIVE_LINES field in the DSI_VTIMING_CFG + * register is 11-bit. + */ + if (mode->vdisplay > 0x7ff) + return MODE_BAD_VVALUE; + + return MODE_OK; +} + +static struct dw_mipi_dsi_plat_data imx6q_mipi_dsi_drv_data = { + .max_data_lanes = 2, + .mode_valid = imx_mipi_dsi_mode_valid, +}; + +static const struct of_device_id imx_mipi_dsi_dt_ids[] = { + { + .compatible = "fsl,imx6q-mipi-dsi", + .data = &imx6q_mipi_dsi_drv_data, + }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx_mipi_dsi_dt_ids); + +static int imx_mipi_dsi_bind(struct device *dev, struct device *master, + void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + const struct of_device_id *of_id = + of_match_device(imx_mipi_dsi_dt_ids, dev); + const struct dw_mipi_dsi_plat_data *pdata = of_id->data; + struct drm_device *drm = data; + struct device_node *np = dev->of_node; + struct imx_mipi_dsi *dsi; + struct resource *res; + int ret; + + dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); + if (!dsi) + return -ENOMEM; + + dsi->dev = dev; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -ENODEV; + + dsi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr"); + if (IS_ERR(dsi->regmap)) + return PTR_ERR(dsi->regmap); + + ret = imx_mipi_dsi_register(drm, dsi); + if (ret) + return ret; + + dev_set_drvdata(dev, dsi); + + return dw_mipi_dsi_bind(dev, master, data, &dsi->encoder, res, pdata); +} + +static void imx_mipi_dsi_unbind(struct device *dev, struct device *master, + void *data) +{ + return dw_mipi_dsi_unbind(dev, master, data); +} + +static const struct component_ops imx_mipi_dsi_ops = { + .bind = imx_mipi_dsi_bind, + .unbind = imx_mipi_dsi_unbind, +}; + +static int imx_mipi_dsi_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &imx_mipi_dsi_ops); +} + +static int imx_mipi_dsi_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &imx_mipi_dsi_ops); + return 0; +} + +static struct platform_driver imx_mipi_dsi_driver = { + .probe = imx_mipi_dsi_probe, + .remove = imx_mipi_dsi_remove, + .driver = { + .of_match_table = imx_mipi_dsi_dt_ids, + .name = DRIVER_NAME, + }, +}; +module_platform_driver(imx_mipi_dsi_driver); + +MODULE_DESCRIPTION("i.MX MIPI DSI host controller driver"); +MODULE_AUTHOR("Liu Ying "); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" DRIVER_NAME);