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Thu, 14 Jan 2021 09:33:24 +0000 From: Liu Ying To: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org Cc: airlied@linux.ie, daniel@ffwll.ch, robh+dt@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, mchehab@kernel.org, a.hajda@samsung.com, narmstrong@baylibre.com, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@siol.net, kishon@ti.com, vkoul@kernel.org Subject: [PATCH v2 09/14] drm/bridge: imx: Add i.MX8qxp pixel link to DPI support Date: Thu, 14 Jan 2021 17:22:07 +0800 Message-Id: <1610616132-8220-10-git-send-email-victor.liu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1610616132-8220-1-git-send-email-victor.liu@nxp.com> References: <1610616132-8220-1-git-send-email-victor.liu@nxp.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Originating-IP: [119.31.174.66] X-ClientProxiedBy: SG2PR04CA0175.apcprd04.prod.outlook.com (2603:1096:4:14::13) To VI1PR04MB3983.eurprd04.prod.outlook.com (2603:10a6:803:4c::16) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (119.31.174.66) by SG2PR04CA0175.apcprd04.prod.outlook.com (2603:1096:4:14::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.3763.10 via Frontend Transport; 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The PXL2DPI interfaces the pixel link 36-bit data output and the DSI controller’s MIPI-DPI 24-bit data input, and inputs of LVDS Display Bridge(LDB) module used in LVDS mode, to remap the pixel color codings between those modules. The PXL2DPI is purely combinatorial. Signed-off-by: Liu Ying --- v1->v2: * Drop unnecessary port availability check. drivers/gpu/drm/bridge/imx/Kconfig | 8 + drivers/gpu/drm/bridge/imx/Makefile | 1 + drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c | 488 +++++++++++++++++++++++++++ 3 files changed, 497 insertions(+) create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig index 4d1f027..1ea1ce7 100644 --- a/drivers/gpu/drm/bridge/imx/Kconfig +++ b/drivers/gpu/drm/bridge/imx/Kconfig @@ -14,3 +14,11 @@ config DRM_IMX8QXP_PIXEL_LINK help Choose this to enable display pixel link found in Freescale i.MX8qm/qxp processors. + +config DRM_IMX8QXP_PIXEL_LINK_TO_DPI + tristate "Freescale i.MX8QXP pixel link to display pixel interface" + depends on OF + select DRM_KMS_HELPER + help + Choose this to enable pixel link to display pixel interface(PXL2DPI) + found in Freescale i.MX8qxp processor. diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile index c15469f..e74dd64 100644 --- a/drivers/gpu/drm/bridge/imx/Makefile +++ b/drivers/gpu/drm/bridge/imx/Makefile @@ -1,2 +1,3 @@ obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK) += imx8qxp-pixel-link.o +obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK_TO_DPI) += imx8qxp-pxl2dpi.o diff --git a/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c new file mode 100644 index 00000000..3169db0 --- /dev/null +++ b/drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c @@ -0,0 +1,488 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright 2020 NXP + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#include + +#define PXL2DPI_CTRL 0x40 +#define CFG1_16BIT 0x0 +#define CFG2_16BIT 0x1 +#define CFG3_16BIT 0x2 +#define CFG1_18BIT 0x3 +#define CFG2_18BIT 0x4 +#define CFG_24BIT 0x5 + +#define DRIVER_NAME "imx8qxp-pxl2dpi" + +struct imx8qxp_pxl2dpi { + struct regmap *regmap; + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct drm_bridge *companion; + struct device *dev; + struct imx_sc_ipc *ipc_handle; + u32 rsc; + u32 in_bus_format; + u32 out_bus_format; + u32 pl_sel; + int id; +}; + +#define bridge_to_p2d(b) container_of(b, struct imx8qxp_pxl2dpi, bridge) + +static int imx8qxp_pxl2dpi_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + + if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) { + DRM_DEV_ERROR(p2d->dev, + "do not support creating a drm_connector\n"); + return -EINVAL; + } + + if (!bridge->encoder) { + DRM_DEV_ERROR(p2d->dev, "missing encoder\n"); + return -ENODEV; + } + + return drm_bridge_attach(bridge->encoder, + p2d->next_bridge, bridge, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); +} + +static int +imx8qxp_pxl2dpi_bridge_atomic_check(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + + p2d->in_bus_format = bridge_state->input_bus_cfg.format; + p2d->out_bus_format = bridge_state->output_bus_cfg.format; + + return 0; +} + +static void +imx8qxp_pxl2dpi_bridge_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + struct imx8qxp_pxl2dpi *companion_p2d; + int ret; + + ret = pm_runtime_get_sync(p2d->dev); + if (ret < 0) + DRM_DEV_ERROR(p2d->dev, + "failed to get runtime PM sync: %d\n", ret); + + ret = imx_sc_misc_set_control(p2d->ipc_handle, p2d->rsc, + IMX_SC_C_PXL_LINK_SEL, p2d->pl_sel); + if (ret) + DRM_DEV_ERROR(p2d->dev, + "failed to set pixel link selection(%u): %d\n", + p2d->pl_sel, ret); + + switch (p2d->out_bus_format) { + case MEDIA_BUS_FMT_RGB888_1X24: + regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG_24BIT); + break; + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: + regmap_write(p2d->regmap, PXL2DPI_CTRL, CFG2_18BIT); + break; + default: + DRM_DEV_ERROR(p2d->dev, + "unsupported output bus format 0x%08x\n", + p2d->out_bus_format); + } + + if (p2d->companion) { + companion_p2d = bridge_to_p2d(p2d->companion); + + companion_p2d->in_bus_format = p2d->in_bus_format; + companion_p2d->out_bus_format = p2d->out_bus_format; + + p2d->companion->funcs->mode_set(p2d->companion, mode, + adjusted_mode); + } +} + +static void +imx8qxp_pxl2dpi_bridge_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) +{ + struct imx8qxp_pxl2dpi *p2d = bridge->driver_private; + int ret; + + ret = pm_runtime_put(p2d->dev); + if (ret < 0) + DRM_DEV_ERROR(p2d->dev, "failed to put runtime PM: %d\n", ret); + + if (p2d->companion) + p2d->companion->funcs->atomic_disable(p2d->companion, + old_bridge_state); +} + +static const u32 imx8qxp_pxl2dpi_bus_output_fmts[] = { + MEDIA_BUS_FMT_RGB888_1X24, + MEDIA_BUS_FMT_RGB666_1X24_CPADHI, +}; + +static bool imx8qxp_pxl2dpi_bus_output_fmt_supported(u32 fmt) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts); i++) { + if (imx8qxp_pxl2dpi_bus_output_fmts[i] == fmt) + return true; + } + + return false; +} + +static u32 * +imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + u32 output_fmt, + unsigned int *num_input_fmts) +{ + u32 *input_fmts; + + if (!imx8qxp_pxl2dpi_bus_output_fmt_supported(output_fmt)) + return NULL; + + *num_input_fmts = 1; + + input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL); + if (!input_fmts) + return NULL; + + switch (output_fmt) { + case MEDIA_BUS_FMT_RGB888_1X24: + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X36_CPADLO; + break; + case MEDIA_BUS_FMT_RGB666_1X24_CPADHI: + input_fmts[0] = MEDIA_BUS_FMT_RGB666_1X36_CPADLO; + break; + default: + kfree(input_fmts); + input_fmts = NULL; + break; + } + + return input_fmts; +} + +static u32 * +imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + unsigned int *num_output_fmts) +{ + *num_output_fmts = ARRAY_SIZE(imx8qxp_pxl2dpi_bus_output_fmts); + return kmemdup(imx8qxp_pxl2dpi_bus_output_fmts, + sizeof(imx8qxp_pxl2dpi_bus_output_fmts), GFP_KERNEL); +} + +static const struct drm_bridge_funcs imx8qxp_pxl2dpi_bridge_funcs = { + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, + .attach = imx8qxp_pxl2dpi_bridge_attach, + .atomic_check = imx8qxp_pxl2dpi_bridge_atomic_check, + .mode_set = imx8qxp_pxl2dpi_bridge_mode_set, + .atomic_disable = imx8qxp_pxl2dpi_bridge_atomic_disable, + .atomic_get_input_bus_fmts = + imx8qxp_pxl2dpi_bridge_atomic_get_input_bus_fmts, + .atomic_get_output_bus_fmts = + imx8qxp_pxl2dpi_bridge_atomic_get_output_bus_fmts, +}; + +static struct device_node * +imx8qxp_pxl2dpi_get_available_ep_from_port(struct imx8qxp_pxl2dpi *p2d, + u32 port_id) +{ + struct device_node *port, *ep; + int ep_cnt; + + port = of_graph_get_port_by_id(p2d->dev->of_node, port_id); + if (!port) { + DRM_DEV_ERROR(p2d->dev, "failed to get port@%u\n", port_id); + return ERR_PTR(-ENODEV); + } + + ep_cnt = of_get_available_child_count(port); + if (ep_cnt == 0) { + DRM_DEV_ERROR(p2d->dev, "no available endpoints of port@%u\n", + port_id); + ep = ERR_PTR(-ENODEV); + goto out; + } else if (ep_cnt > 1) { + DRM_DEV_ERROR(p2d->dev, + "invalid available endpoints of port@%u\n", port_id); + ep = ERR_PTR(-ENOTSUPP); + goto out; + } + + ep = of_get_next_available_child(port, NULL); + if (!ep) { + DRM_DEV_ERROR(p2d->dev, + "failed to get available endpoint of port@%u\n", + port_id); + ep = ERR_PTR(-ENODEV); + goto out; + } +out: + of_node_put(port); + return ep; +} + +static struct drm_bridge * +imx8qxp_pxl2dpi_find_next_bridge(struct imx8qxp_pxl2dpi *p2d) +{ + struct device_node *ep, *remote; + struct drm_bridge *next_bridge; + int ret; + + ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 1); + if (IS_ERR(ep)) { + ret = PTR_ERR(ep); + return ERR_PTR(ret); + } + + remote = of_graph_get_remote_port_parent(ep); + if (!remote || !of_device_is_available(remote)) { + DRM_DEV_ERROR(p2d->dev, "no available remote\n"); + next_bridge = ERR_PTR(-ENODEV); + goto out; + } else if (!of_device_is_available(remote->parent)) { + DRM_DEV_ERROR(p2d->dev, "remote parent is not available\n"); + next_bridge = ERR_PTR(-ENODEV); + goto out; + } + + next_bridge = of_drm_find_bridge(remote); + if (!next_bridge) { + next_bridge = ERR_PTR(-EPROBE_DEFER); + goto out; + } +out: + of_node_put(remote); + of_node_put(ep); + + return next_bridge; +} + +static int imx8qxp_pxl2dpi_set_pixel_link_sel(struct imx8qxp_pxl2dpi *p2d) +{ + struct device_node *ep; + struct of_endpoint endpoint; + int ret; + + ep = imx8qxp_pxl2dpi_get_available_ep_from_port(p2d, 0); + if (IS_ERR(ep)) + return PTR_ERR(ep); + + ret = of_graph_parse_endpoint(ep, &endpoint); + if (ret) { + DRM_DEV_ERROR(p2d->dev, + "failed to parse endpoint of port@0: %d\n", ret); + goto out; + } + + p2d->pl_sel = endpoint.id; +out: + of_node_put(ep); + + return ret; +} + +static int imx8qxp_pxl2dpi_parse_dt_companion(struct imx8qxp_pxl2dpi *p2d) +{ + struct imx8qxp_pxl2dpi *companion_p2d; + struct device *dev = p2d->dev; + struct device_node *companion; + struct device_node *port1, *port2; + const struct of_device_id *match; + int dual_link; + int ret = 0; + + /* Locate the companion PXL2DPI for dual-link operation, if any. */ + companion = of_parse_phandle(dev->of_node, "fsl,companion-pxl2dpi", 0); + if (!companion) + return 0; + + if (!of_device_is_available(companion)) { + DRM_DEV_ERROR(dev, "companion PXL2DPI is not available\n"); + ret = -ENODEV; + goto out; + } + + /* + * Sanity check: the companion bridge must have the same compatible + * string. + */ + match = of_match_device(dev->driver->of_match_table, dev); + if (!of_device_is_compatible(companion, match->compatible)) { + DRM_DEV_ERROR(dev, "companion PXL2DPI is incompatible\n"); + ret = -ENXIO; + goto out; + } + + p2d->companion = of_drm_find_bridge(companion); + if (!p2d->companion) { + ret = -EPROBE_DEFER; + DRM_DEV_DEBUG_DRIVER(p2d->dev, + "failed to find companion bridge: %d\n", ret); + goto out; + } + + companion_p2d = bridge_to_p2d(p2d->companion); + + /* + * We need to work out if the sink is expecting us to function in + * dual-link mode. We do this by looking at the DT port nodes that + * the next bridges are connected to. If they are marked as expecting + * even pixels and odd pixels than we need to use the companion PXL2DPI. + */ + port1 = of_graph_get_port_by_id(p2d->next_bridge->of_node, 1); + port2 = of_graph_get_port_by_id(companion_p2d->next_bridge->of_node, 1); + dual_link = drm_of_lvds_get_dual_link_pixel_order(port1, port2); + of_node_put(port1); + of_node_put(port2); + + if (dual_link < 0) { + ret = dual_link; + DRM_DEV_ERROR(dev, "failed to get dual link pixel order: %d\n", + ret); + goto out; + } + + DRM_DEV_DEBUG_DRIVER(dev, + "dual-link configuration detected (companion bridge %pOF)\n", + companion); +out: + of_node_put(companion); + return ret; +} + +static int imx8qxp_pxl2dpi_bridge_probe(struct platform_device *pdev) +{ + struct imx8qxp_pxl2dpi *p2d; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + int ret; + + p2d = devm_kzalloc(dev, sizeof(*p2d), GFP_KERNEL); + if (!p2d) + return -ENOMEM; + + p2d->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,syscon"); + if (IS_ERR(p2d->regmap)) { + ret = PTR_ERR(p2d->regmap); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret); + return ret; + } + + p2d->id = of_alias_get_id(np, "pxl2dpi"); + if (p2d->id < 0) { + DRM_DEV_ERROR(dev, "failed to get PXL2DPI node alias id: %d\n", + p2d->id); + return p2d->id; + } + + ret = imx_scu_get_handle(&p2d->ipc_handle); + if (ret) { + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get SCU ipc handle: %d\n", + ret); + return ret; + } + + p2d->dev = dev; + p2d->rsc = p2d->id ? IMX_SC_R_MIPI_1 : IMX_SC_R_MIPI_0; + + p2d->next_bridge = imx8qxp_pxl2dpi_find_next_bridge(p2d); + if (IS_ERR(p2d->next_bridge)) { + ret = PTR_ERR(p2d->next_bridge); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to find next bridge: %d\n", + ret); + return ret; + } + + ret = imx8qxp_pxl2dpi_set_pixel_link_sel(p2d); + if (ret) + return ret; + + ret = imx8qxp_pxl2dpi_parse_dt_companion(p2d); + if (ret) + return ret; + + platform_set_drvdata(pdev, p2d); + pm_runtime_enable(dev); + + p2d->bridge.driver_private = p2d; + p2d->bridge.funcs = &imx8qxp_pxl2dpi_bridge_funcs; + p2d->bridge.of_node = np; + + drm_bridge_add(&p2d->bridge); + + return ret; +} + +static int imx8qxp_pxl2dpi_bridge_remove(struct platform_device *pdev) +{ + struct imx8qxp_pxl2dpi *p2d = platform_get_drvdata(pdev); + + drm_bridge_remove(&p2d->bridge); + + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static const struct of_device_id imx8qxp_pxl2dpi_dt_ids[] = { + { .compatible = "fsl,imx8qxp-pxl2dpi", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx8qxp_pxl2dpi_dt_ids); + +static struct platform_driver imx8qxp_pxl2dpi_bridge_driver = { + .probe = imx8qxp_pxl2dpi_bridge_probe, + .remove = imx8qxp_pxl2dpi_bridge_remove, + .driver = { + .of_match_table = imx8qxp_pxl2dpi_dt_ids, + .name = DRIVER_NAME, + }, +}; +module_platform_driver(imx8qxp_pxl2dpi_bridge_driver); + +MODULE_DESCRIPTION("i.MX8QXP pixel link to DPI bridge driver"); +MODULE_AUTHOR("Liu Ying "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME); -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 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=-17.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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