From patchwork Sat Jan 6 21:09:14 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adam Ford X-Patchwork-Id: 13512808 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 8D0DEC46CD2 for ; Sat, 6 Jan 2024 21:09:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 12FEB10E0EF; Sat, 6 Jan 2024 21:09:27 +0000 (UTC) Received: from mail-io1-xd2c.google.com (mail-io1-xd2c.google.com [IPv6:2607:f8b0:4864:20::d2c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6EBA710E0EE for ; Sat, 6 Jan 2024 21:09:25 +0000 (UTC) Received: by mail-io1-xd2c.google.com with SMTP id ca18e2360f4ac-7b7f9fdc14dso37485239f.0 for ; Sat, 06 Jan 2024 13:09:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1704575364; x=1705180164; darn=lists.freedesktop.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=CI6ttPa02hRekngGjx7elQP3thGExUT5SmI2imJlzbE=; b=nPWc7DUTsL9Q1Rxndx/Iy9+Ekbffcv+d+Lfc88my69HDDfDldy3Az8CV4YGaQ3qvtX OoOJd6b+qWvQCzsO4QKFx3YpNF6NAkursz4S19hwDLyme+s+8O8poRYVESLv1banPuXg MnOsNtC9Iadap9Zd54er0lJjB/3SeDk4e99o8qujdVptWkvZQRMmq0FoKX5Z9u+m2ZfX x0XAjUCaA6q5aS6+X5WON6OTxknUDimife7j3NN8nyhz8NRf5eAxlp/d4PTJccFhKUg5 2KXcSnO3tYAhJPY8VKQ2WCjX6VLP6+MlFMCvCRZWGLg9s4Xy2vsZVck+VeHlRjsXZejw 0ggg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704575364; x=1705180164; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=CI6ttPa02hRekngGjx7elQP3thGExUT5SmI2imJlzbE=; b=oyjH7v20Z+Gun4ejyLPo00ozB0g8TIyHPBq/6Owkoox7EZ26OLjfvh/J6Q89FWc2rV sEnMdG282op+GP0Od635f0JajXsKQHKnvIVFFlKWyYyH2gZgZYJFcRIGBPPUxYIUQ5PA 0aYlIyYfMCWpPINs9hhVHRttJT04shw1UA+F9xZUNYy5VbMFolxFEMZ4ojd35mkx7gIm slU1SrYWyRkwS+M1aSEYPAoZd/gs/hOAJK/tHqlDMRc6HSB4p0n+6tY6lmNfOS6/52G3 yCtwLbiwpShQY7jNgNDwRqDaYGz4ScS2E/Aq/qdSAMyI1sHI+Sy0DtrUjMLaWJT0Q7zs 5lbg== X-Gm-Message-State: AOJu0YzWxBfHi5WhrvumfajiXgPIBzidRtA4t53afMb8Fkv7Pa/VTGmp OFKDvQpT2upCl4qRU2DMMYxVzvVSeP/4vA== X-Google-Smtp-Source: AGHT+IFH0av1Ll5NSFwDKAySl9QZcvvqATMc+jyWqYpdnp4NFxVbwqCydC77cIMmDzjKOyJbLDsAwg== X-Received: by 2002:a05:6e02:1c87:b0:35f:ced5:5555 with SMTP id w7-20020a056e021c8700b0035fced55555mr1718635ill.25.1704575364098; Sat, 06 Jan 2024 13:09:24 -0800 (PST) Received: from aford-System-Version.lan ([2601:447:d002:5be:af2f:17f0:33a3:d6fe]) by smtp.gmail.com with ESMTPSA id d101-20020a0285ee000000b0046d2e9a04a9sm1312615jai.135.2024.01.06.13.09.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 06 Jan 2024 13:09:23 -0800 (PST) From: Adam Ford To: dri-devel@lists.freedesktop.org Subject: [PATCH V6 2/2] drm/bridge: imx: add driver for HDMI TX Parallel Video Interface Date: Sat, 6 Jan 2024 15:09:14 -0600 Message-ID: <20240106210915.5135-2-aford173@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240106210915.5135-1-aford173@gmail.com> References: <20240106210915.5135-1-aford173@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jernej Skrabec , Andrzej Hajda , Laurent Pinchart , Krzysztof Kozlowski , Fabio Estevam , Richard Leitner , Marek Vasut , Robert Foss , Frieder Schrempf , NXP Linux Team , Luca Ceresoli , devicetree@vger.kernel.org, Conor Dooley , Thomas Zimmermann , Jonas Karlman , Liu Ying , Sascha Hauer , Maxime Ripard , Rob Herring , Adam Ford , Pengutronix Kernel Team , linux-arm-kernel@lists.infradead.org, Neil Armstrong , linux-kernel@vger.kernel.org, Shawn Guo Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Lucas Stach This IP block is found in the HDMI subsystem of the i.MX8MP SoC. It has a full timing generator and can switch between different video sources. On the i.MX8MP however the only supported source is the LCDIF. The block just needs to be powered up and told about the polarity of the video sync signals to act in bypass mode. Signed-off-by: Lucas Stach Reviewed-by: Luca Ceresoli (v2) Tested-by: Marek Vasut (v1) Tested-by: Luca Ceresoli (v2) Tested-by: Richard Leitner (v2) Tested-by: Frieder Schrempf (v2) Reviewed-by: Laurent Pinchart (v3) Reviewed-by: Luca Ceresoli Tested-by: Luca Ceresoli Tested-by: Fabio Estevam Signed-off-by: Adam Ford --- V6: No change. V5: I (Adam) tried to help move this along, so I took Lucas' patch and attempted to apply fixes based on feedback. I don't have all the history, so apologies for that. No changes from V4 to V5 diff --git a/drivers/gpu/drm/bridge/imx/Kconfig b/drivers/gpu/drm/bridge/imx/Kconfig index 5a4f3d58501e..a4d13331e320 100644 --- a/drivers/gpu/drm/bridge/imx/Kconfig +++ b/drivers/gpu/drm/bridge/imx/Kconfig @@ -3,6 +3,13 @@ if ARCH_MXC || COMPILE_TEST config DRM_IMX_LDB_HELPER tristate +config DRM_IMX8MP_HDMI_PVI + tristate "Freescale i.MX8MP HDMI PVI bridge support" + depends on OF + help + Choose this to enable support for the internal HDMI TX Parallel + Video Interface found on the Freescale i.MX8MP SoC. + config DRM_IMX8QM_LDB tristate "Freescale i.MX8QM LVDS display bridge" depends on OF diff --git a/drivers/gpu/drm/bridge/imx/Makefile b/drivers/gpu/drm/bridge/imx/Makefile index 2b0c2e44aa1b..e2c2106509fa 100644 --- a/drivers/gpu/drm/bridge/imx/Makefile +++ b/drivers/gpu/drm/bridge/imx/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_DRM_IMX_LDB_HELPER) += imx-ldb-helper.o +obj-$(CONFIG_DRM_IMX8MP_HDMI_PVI) += imx8mp-hdmi-pvi.o obj-$(CONFIG_DRM_IMX8QM_LDB) += imx8qm-ldb.o obj-$(CONFIG_DRM_IMX8QXP_LDB) += imx8qxp-ldb.o obj-$(CONFIG_DRM_IMX8QXP_PIXEL_COMBINER) += imx8qxp-pixel-combiner.o diff --git a/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c new file mode 100644 index 000000000000..9efe051a1e31 --- /dev/null +++ b/drivers/gpu/drm/bridge/imx/imx8mp-hdmi-pvi.c @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright (C) 2022 Pengutronix, Lucas Stach + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define HTX_PVI_CTRL 0x0 +#define PVI_CTRL_OP_VSYNC_POL BIT(18) +#define PVI_CTRL_OP_HSYNC_POL BIT(17) +#define PVI_CTRL_OP_DE_POL BIT(16) +#define PVI_CTRL_INP_VSYNC_POL BIT(14) +#define PVI_CTRL_INP_HSYNC_POL BIT(13) +#define PVI_CTRL_INP_DE_POL BIT(12) +#define PVI_CTRL_MODE_MASK GENMASK(2, 1) +#define PVI_CTRL_MODE_LCDIF 2 +#define PVI_CTRL_EN BIT(0) + +struct imx8mp_hdmi_pvi { + struct drm_bridge bridge; + struct device *dev; + struct drm_bridge *next_bridge; + void __iomem *regs; +}; + +static inline struct imx8mp_hdmi_pvi * +to_imx8mp_hdmi_pvi(struct drm_bridge *bridge) +{ + return container_of(bridge, struct imx8mp_hdmi_pvi, bridge); +} + +static int imx8mp_hdmi_pvi_bridge_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct imx8mp_hdmi_pvi *pvi = to_imx8mp_hdmi_pvi(bridge); + + return drm_bridge_attach(bridge->encoder, pvi->next_bridge, + bridge, flags); +} + +static void imx8mp_hdmi_pvi_bridge_enable(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state) +{ + struct drm_atomic_state *state = bridge_state->base.state; + struct imx8mp_hdmi_pvi *pvi = to_imx8mp_hdmi_pvi(bridge); + struct drm_connector_state *conn_state; + const struct drm_display_mode *mode; + struct drm_crtc_state *crtc_state; + struct drm_connector *connector; + u32 bus_flags, val; + + connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); + conn_state = drm_atomic_get_new_connector_state(state, connector); + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); + + if (WARN_ON(pm_runtime_resume_and_get(pvi->dev))) + return; + + mode = &crtc_state->adjusted_mode; + + val = FIELD_PREP(PVI_CTRL_MODE_MASK, PVI_CTRL_MODE_LCDIF) | PVI_CTRL_EN; + + if (mode->flags & DRM_MODE_FLAG_PVSYNC) + val |= PVI_CTRL_OP_VSYNC_POL | PVI_CTRL_INP_VSYNC_POL; + + if (mode->flags & DRM_MODE_FLAG_PHSYNC) + val |= PVI_CTRL_OP_HSYNC_POL | PVI_CTRL_INP_HSYNC_POL; + + if (pvi->next_bridge->timings) + bus_flags = pvi->next_bridge->timings->input_bus_flags; + else if (bridge_state) + bus_flags = bridge_state->input_bus_cfg.flags; + + if (bus_flags & DRM_BUS_FLAG_DE_HIGH) + val |= PVI_CTRL_OP_DE_POL | PVI_CTRL_INP_DE_POL; + + writel(val, pvi->regs + HTX_PVI_CTRL); +} + +static void imx8mp_hdmi_pvi_bridge_disable(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state) +{ + struct imx8mp_hdmi_pvi *pvi = to_imx8mp_hdmi_pvi(bridge); + + writel(0x0, pvi->regs + HTX_PVI_CTRL); + + pm_runtime_put(pvi->dev); +} + +static u32 * +imx8mp_hdmi_pvi_bridge_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) +{ + struct imx8mp_hdmi_pvi *pvi = to_imx8mp_hdmi_pvi(bridge); + struct drm_bridge *next_bridge = pvi->next_bridge; + struct drm_bridge_state *next_state; + + if (!next_bridge->funcs->atomic_get_input_bus_fmts) + return 0; + + next_state = drm_atomic_get_new_bridge_state(crtc_state->state, + next_bridge); + + return next_bridge->funcs->atomic_get_input_bus_fmts(next_bridge, + next_state, + crtc_state, + conn_state, + output_fmt, + num_input_fmts); +} + +static const struct drm_bridge_funcs imx_hdmi_pvi_bridge_funcs = { + .attach = imx8mp_hdmi_pvi_bridge_attach, + .atomic_enable = imx8mp_hdmi_pvi_bridge_enable, + .atomic_disable = imx8mp_hdmi_pvi_bridge_disable, + .atomic_get_input_bus_fmts = imx8mp_hdmi_pvi_bridge_get_input_bus_fmts, + .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, +}; + +static int imx8mp_hdmi_pvi_probe(struct platform_device *pdev) +{ + struct device_node *remote; + struct imx8mp_hdmi_pvi *pvi; + + pvi = devm_kzalloc(&pdev->dev, sizeof(*pvi), GFP_KERNEL); + if (!pvi) + return -ENOMEM; + + platform_set_drvdata(pdev, pvi); + pvi->dev = &pdev->dev; + + pvi->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(pvi->regs)) + return PTR_ERR(pvi->regs); + + /* Get the next bridge in the pipeline. */ + remote = of_graph_get_remote_node(pdev->dev.of_node, 1, -1); + if (!remote) + return -EINVAL; + + pvi->next_bridge = of_drm_find_bridge(remote); + of_node_put(remote); + + if (!pvi->next_bridge) + return dev_err_probe(&pdev->dev, -EPROBE_DEFER, + "could not find next bridge\n"); + + pm_runtime_enable(&pdev->dev); + + /* Register the bridge. */ + pvi->bridge.funcs = &imx_hdmi_pvi_bridge_funcs; + pvi->bridge.of_node = pdev->dev.of_node; + pvi->bridge.timings = pvi->next_bridge->timings; + + drm_bridge_add(&pvi->bridge); + + return 0; +} + +static int imx8mp_hdmi_pvi_remove(struct platform_device *pdev) +{ + struct imx8mp_hdmi_pvi *pvi = platform_get_drvdata(pdev); + + drm_bridge_remove(&pvi->bridge); + + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static const struct of_device_id imx8mp_hdmi_pvi_match[] = { + { + .compatible = "fsl,imx8mp-hdmi-pvi", + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, imx8mp_hdmi_pvi_match); + +static struct platform_driver imx8mp_hdmi_pvi_driver = { + .probe = imx8mp_hdmi_pvi_probe, + .remove = imx8mp_hdmi_pvi_remove, + .driver = { + .name = "imx-hdmi-pvi", + .of_match_table = imx8mp_hdmi_pvi_match, + }, +}; +module_platform_driver(imx8mp_hdmi_pvi_driver); + +MODULE_DESCRIPTION("i.MX8MP HDMI TX Parallel Video Interface bridge driver"); +MODULE_LICENSE("GPL");