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Add device tree bindings for the display format configuration. Signed-off-by: Liu Ying --- .../display/bridge/nxp,imx93-pdfc.yaml | 78 +++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml diff --git a/Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml b/Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml new file mode 100644 index 000000000000..a84bfb46b01d --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/nxp,imx93-pdfc.yaml @@ -0,0 +1,78 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/bridge/nxp,imx93-pdfc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NXP i.MX93 Parallel Display Format Configuration + +maintainers: + - Liu Ying + +description: | + The i.MX93 mediamix blk-ctrl contains one DISPLAY_MUX register which + configures parallel display format by using the "PARALLEL_DISP_FORMAT" + field. + +properties: + compatible: + const: nxp,imx93-pdfc + + reg: + maxItems: 1 + + ports: + $ref: /schemas/graph.yaml#/properties/ports + + properties: + port@0: + $ref: /schemas/graph.yaml#/properties/port + description: Input port node to receive pixel data. + + port@1: + $ref: /schemas/graph.yaml#/properties/port + description: Output port node to downstream pixel data receivers. + + required: + - port@0 + - port@1 + +required: + - compatible + - ports + +additionalProperties: false + +examples: + - | + + blk-ctrl { + #address-cells = <1>; + #size-cells = <1>; + + bridge@60 { + compatible = "nxp,imx93-pdfc"; + reg = <0x60 0x4>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + + pdfc_from_lcdif: endpoint { + remote-endpoint = <&lcdif_to_pdfc>; + }; + }; + + port@1 { + reg = <1>; + + pdfc_to_panel: endpoint { + remote-endpoint = <&panel_from_pdfc>; + }; + }; + }; + }; + }; From patchwork Sat Jan 28 03:47:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ying Liu X-Patchwork-Id: 13119633 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 BCCCDC61DB3 for ; Sat, 28 Jan 2023 03:47:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; 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Sat, 28 Jan 2023 03:46:33 +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 Cc: andrzej.hajda@intel.com, neil.armstrong@linaro.org, robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com, jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com, daniel@ffwll.ch, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com Subject: [PATCH 2/2] drm/bridge: imx: Add i.MX93 parallel display format configuration support Date: Sat, 28 Jan 2023 11:47:13 +0800 Message-Id: <20230128034713.1530218-3-victor.liu@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20230128034713.1530218-1-victor.liu@nxp.com> References: <20230128034713.1530218-1-victor.liu@nxp.com> X-ClientProxiedBy: SI2PR02CA0047.apcprd02.prod.outlook.com (2603:1096:4:196::14) To AM7PR04MB7046.eurprd04.prod.outlook.com (2603:10a6:20b:113::22) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM7PR04MB7046:EE_|PAXPR04MB9203:EE_ X-MS-Office365-Filtering-Correlation-Id: 78dce08b-8365-4d9b-e9e0-08db00e23fc9 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Add a DRM bridge driver to support the display format configuration. Signed-off-by: Liu Ying --- drivers/gpu/drm/bridge/imx/Kconfig | 8 + drivers/gpu/drm/bridge/imx/Makefile | 1 + drivers/gpu/drm/bridge/imx/imx93-pdfc.c | 209 ++++++++++++++++++++++++ 3 files changed, 218 insertions(+) create mode 100644 drivers/gpu/drm/bridge/imx/imx93-pdfc.c diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig index 608f47f41bcd..adbd75a924d1 100644 --- a/drivers/gpu/drm/bridge/imx/Kconfig +++ b/drivers/gpu/drm/bridge/imx/Kconfig @@ -44,4 +44,12 @@ config DRM_IMX8QXP_PIXEL_LINK_TO_DPI Choose this to enable pixel link to display pixel interface(PXL2DPI) found in Freescale i.MX8qxp processor. +config DRM_IMX93_PARALLEL_DISP_FMT_CONFIG + tristate "NXP i.MX93 parallel display format configuration" + depends on OF + select DRM_KMS_HELPER + help + Choose this to enable parallel display format configuration + found in NXP i.MX93 processor. + endif # ARCH_MXC || COMPILE_TEST diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile index aa90ec8d5433..e88821733770 100644 --- a/drivers/gpu/drm/bridge/imx/Makefile +++ b/drivers/gpu/drm/bridge/imx/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_DRM_IMX8QXP_LDB) += imx8qxp-ldb.o obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK) += imx8qxp-pixel-link.o obj-$(CONFIG_DRM_IMX8QXP_PIXEL_LINK_TO_DPI) += imx8qxp-pxl2dpi.o +obj-$(CONFIG_DRM_IMX93_PARALLEL_DISP_FMT_CONFIG) += imx93-pdfc.o diff --git a/drivers/gpu/drm/bridge/imx/imx93-pdfc.c b/drivers/gpu/drm/bridge/imx/imx93-pdfc.c new file mode 100644 index 000000000000..a891b1f6743a --- /dev/null +++ b/drivers/gpu/drm/bridge/imx/imx93-pdfc.c @@ -0,0 +1,209 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright 2022,2023 NXP + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define DRIVER_NAME "imx93_pdfc" + +#define DISPLAY_MUX 0x60 +#define PARALLEL_DISP_FORMAT 0x700 + +enum imx93_pdfc_format { + RGB888_TO_RGB888 = 0x0, + RGB888_TO_RGB666 = 0x1 << 8, + RGB565_TO_RGB565 = 0x2 << 8, +}; + +struct imx93_pdfc { + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct device *dev; + struct regmap *regmap; + u32 format; +}; + +static int imx93_pdfc_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct imx93_pdfc *pdfc = bridge->driver_private; + + return drm_bridge_attach(bridge->encoder, pdfc->next_bridge, bridge, flags); +} + +static void +imx93_pdfc_bridge_atomic_enable(struct drm_bridge *bridge, + struct drm_bridge_state *old_bridge_state) +{ + struct imx93_pdfc *pdfc = bridge->driver_private; + + regmap_update_bits(pdfc->regmap, DISPLAY_MUX, PARALLEL_DISP_FORMAT, + pdfc->format); +} + +static const u32 imx93_pdfc_bus_output_fmts[] = { + MEDIA_BUS_FMT_RGB888_1X24, + MEDIA_BUS_FMT_RGB666_1X18, + MEDIA_BUS_FMT_RGB565_1X16, + MEDIA_BUS_FMT_FIXED +}; + +static bool imx93_pdfc_bus_output_fmt_supported(u32 fmt) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(imx93_pdfc_bus_output_fmts); i++) { + if (imx93_pdfc_bus_output_fmts[i] == fmt) + return true; + } + + return false; +} + +static u32 * +imx93_pdfc_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 (!imx93_pdfc_bus_output_fmt_supported(output_fmt)) + return NULL; + + input_fmts = kmalloc(sizeof(*input_fmts), GFP_KERNEL); + if (!input_fmts) + return NULL; + + switch (output_fmt) { + case MEDIA_BUS_FMT_RGB888_1X24: + case MEDIA_BUS_FMT_RGB565_1X16: + input_fmts[0] = output_fmt; + break; + case MEDIA_BUS_FMT_RGB666_1X18: + case MEDIA_BUS_FMT_FIXED: + input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24; + break; + } + + *num_input_fmts = 1; + + return input_fmts; +} + +static int imx93_pdfc_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 imx93_pdfc *pdfc = bridge->driver_private; + + switch (bridge_state->output_bus_cfg.format) { + case MEDIA_BUS_FMT_RGB888_1X24: + pdfc->format = RGB888_TO_RGB888; + break; + case MEDIA_BUS_FMT_RGB666_1X18: + pdfc->format = RGB888_TO_RGB666; + break; + case MEDIA_BUS_FMT_RGB565_1X16: + pdfc->format = RGB565_TO_RGB565; + break; + default: + DRM_DEV_DEBUG_DRIVER(pdfc->dev, "Unsupported output bus format: 0x%x\n", + bridge_state->output_bus_cfg.format); + return -EINVAL; + } + + return 0; +} + +static const struct drm_bridge_funcs imx93_pdfc_bridge_funcs = { + .attach = imx93_pdfc_bridge_attach, + .atomic_enable = imx93_pdfc_bridge_atomic_enable, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_get_input_bus_fmts = imx93_pdfc_bridge_atomic_get_input_bus_fmts, + .atomic_check = imx93_pdfc_bridge_atomic_check, + .atomic_reset = drm_atomic_helper_bridge_reset, +}; + +static int imx93_pdfc_bridge_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct imx93_pdfc *pdfc; + int ret; + + pdfc = devm_kzalloc(dev, sizeof(*pdfc), GFP_KERNEL); + if (!pdfc) + return -ENOMEM; + + pdfc->regmap = syscon_node_to_regmap(dev->of_node->parent); + if (IS_ERR(pdfc->regmap)) { + ret = PTR_ERR(pdfc->regmap); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get regmap: %d\n", ret); + return ret; + } + + pdfc->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); + if (IS_ERR(pdfc->next_bridge)) { + ret = PTR_ERR(pdfc->next_bridge); + if (ret != -EPROBE_DEFER) + DRM_DEV_ERROR(dev, "failed to get next bridge: %d\n", ret); + return ret; + } + + platform_set_drvdata(pdev, pdfc); + + pdfc->dev = dev; + pdfc->bridge.driver_private = pdfc; + pdfc->bridge.funcs = &imx93_pdfc_bridge_funcs; + pdfc->bridge.of_node = dev->of_node; + + drm_bridge_add(&pdfc->bridge); + + return 0; +} + +static int imx93_pdfc_bridge_remove(struct platform_device *pdev) +{ + struct imx93_pdfc *pdfc = platform_get_drvdata(pdev); + + drm_bridge_remove(&pdfc->bridge); + + return 0; +} + +static const struct of_device_id imx93_pdfc_dt_ids[] = { + { .compatible = "nxp,imx93-pdfc", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx93_pdfc_dt_ids); + +static struct platform_driver imx93_pdfc_bridge_driver = { + .probe = imx93_pdfc_bridge_probe, + .remove = imx93_pdfc_bridge_remove, + .driver = { + .of_match_table = imx93_pdfc_dt_ids, + .name = DRIVER_NAME, + }, +}; +module_platform_driver(imx93_pdfc_bridge_driver); + +MODULE_DESCRIPTION("NXP i.MX93 parallel display format configuration driver"); +MODULE_AUTHOR("Liu Ying "); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" DRIVER_NAME);