From patchwork Wed Apr 6 16:01:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 12803693 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 191EEC433EF for ; Wed, 6 Apr 2022 16:03:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; 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:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=prXJWr2dZyDygEIbLOG2NYs3boOAbYrSiDQr7QCMeDs=; b=0NRCniblWHXrX4 Ikt1E1zvU9hzzU+ozz0JUTCpb1aeogDJM6dIUv/uEwcV675nw5GVxgCSEPTTswPkk/FUO6E79vxuj nlkANqJg43lwFBopfbD2McREyNRq+c/IfAjLPfAyEjWgGsHgZ9OCloH13TKO86Suu8sNDBmDC5c4a Skh4xKtx2gE6sg2tP889BYU5i/sB3ON19PVPtt4lkBb/uHfreQF4KLD9/bOu7poptXfd2rIoJPS2S IWwjcHp2aJ8MTLM/eV4cX6IYyw58DkgoRTgFsDjm/dPt0/E+pmV1wG05ywx8Xc9IEArtMiMZjfOVF 2hjiddz1tovSsSsJIIZA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nc86w-0072U7-RR; Wed, 06 Apr 2022 16:02:22 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nc86H-00728F-4D for linux-arm-kernel@lists.infradead.org; Wed, 06 Apr 2022 16:01:43 +0000 Received: from dude03.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::39]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1nc863-0002Pq-Ln; Wed, 06 Apr 2022 18:01:27 +0200 From: Lucas Stach To: Philipp Zabel , Rob Herring , Krzysztof Kozlowski , Shawn Guo , NXP Linux Team Cc: Fabio Estevam , Pengutronix Kernel Team , Robert Foss , Neil Armstrong , Andrzej Hajda , Vinod Koul , Kishon Vijay Abraham I , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-phy@lists.infradead.org, patchwork-lst@pengutronix.de Subject: [PATCH v0 03/10] drm/imx: add bridge wrapper driver for i.MX8MP DWC HDMI Date: Wed, 6 Apr 2022 18:01:16 +0200 Message-Id: <20220406160123.1272911-4-l.stach@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220406160123.1272911-1-l.stach@pengutronix.de> References: <20220406160123.1272911-1-l.stach@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:1101:1d::39 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220406_090141_206244_F7C7B7B8 X-CRM114-Status: GOOD ( 23.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add a simple wrapper driver for the DWC HDMI bridge driver that implements the few bits that are necessary to abstract the i.MX8MP SoC integration. Signed-off-by: Lucas Stach Reviewed-by: Philipp Zabel --- drivers/gpu/drm/imx/Kconfig | 1 + drivers/gpu/drm/imx/Makefile | 2 + drivers/gpu/drm/imx/bridge/Kconfig | 10 ++ drivers/gpu/drm/imx/bridge/Makefile | 3 + drivers/gpu/drm/imx/bridge/imx-hdmi.c | 128 ++++++++++++++++++++++++++ 5 files changed, 144 insertions(+) create mode 100644 drivers/gpu/drm/imx/bridge/Kconfig create mode 100644 drivers/gpu/drm/imx/bridge/Makefile create mode 100644 drivers/gpu/drm/imx/bridge/imx-hdmi.c diff --git a/drivers/gpu/drm/imx/Kconfig b/drivers/gpu/drm/imx/Kconfig index bb9738c7c825..88b054c095c6 100644 --- a/drivers/gpu/drm/imx/Kconfig +++ b/drivers/gpu/drm/imx/Kconfig @@ -42,3 +42,4 @@ config DRM_IMX_HDMI Choose this if you want to use HDMI on i.MX6. source "drivers/gpu/drm/imx/dcss/Kconfig" +source "drivers/gpu/drm/imx/bridge/Kconfig" diff --git a/drivers/gpu/drm/imx/Makefile b/drivers/gpu/drm/imx/Makefile index b644deffe948..861403d11af6 100644 --- a/drivers/gpu/drm/imx/Makefile +++ b/drivers/gpu/drm/imx/Makefile @@ -10,3 +10,5 @@ obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o obj-$(CONFIG_DRM_IMX_HDMI) += dw_hdmi-imx.o obj-$(CONFIG_DRM_IMX_DCSS) += dcss/ + +obj-y += bridge/ diff --git a/drivers/gpu/drm/imx/bridge/Kconfig b/drivers/gpu/drm/imx/bridge/Kconfig new file mode 100644 index 000000000000..8b02dc5606ba --- /dev/null +++ b/drivers/gpu/drm/imx/bridge/Kconfig @@ -0,0 +1,10 @@ +# SPDX-License-Identifier: GPL-2.0 + +config DRM_IMX_DW_HDMI_BRIDGE + tristate "HDMI encoder support" + depends on (ARCH_MXC && ARM64) || COMPILE_TEST + depends on DRM && OF + select DRM_DW_HDMI + help + Enable support for the internal HDMI encoder on i.MX8MP SoC + diff --git a/drivers/gpu/drm/imx/bridge/Makefile b/drivers/gpu/drm/imx/bridge/Makefile new file mode 100644 index 000000000000..1cfe9623c0d8 --- /dev/null +++ b/drivers/gpu/drm/imx/bridge/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 + +obj-$(CONFIG_DRM_IMX_DW_HDMI_BRIDGE) += imx-hdmi.o diff --git a/drivers/gpu/drm/imx/bridge/imx-hdmi.c b/drivers/gpu/drm/imx/bridge/imx-hdmi.c new file mode 100644 index 000000000000..2e72f83be108 --- /dev/null +++ b/drivers/gpu/drm/imx/bridge/imx-hdmi.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0+ + +/* + * Copyright (C) 2022 Pengutronix, Lucas Stach + */ + +#include +#include +#include +#include +#include +#include + +struct imx_hdmi { + struct dw_hdmi_plat_data plat_data; + struct dw_hdmi *dw_hdmi; + struct clk *pixclk; +}; + +static enum drm_mode_status +imx8mp_hdmi_mode_valid(struct dw_hdmi *dw_hdmi, void *data, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + struct imx_hdmi *hdmi = (struct imx_hdmi *)data; + + if (mode->clock < 13500) + return MODE_CLOCK_LOW; + + if (mode->clock > 297000) + return MODE_CLOCK_HIGH; + + if (clk_round_rate(hdmi->pixclk, mode->clock * 1000) != + mode->clock * 1000) + return MODE_CLOCK_RANGE; + + /* We don't support double-clocked and Interlaced modes */ + if ((mode->flags & DRM_MODE_FLAG_DBLCLK) || + (mode->flags & DRM_MODE_FLAG_INTERLACE)) + return MODE_BAD; + + return MODE_OK; +} + +static int imx8mp_hdmi_phy_init(struct dw_hdmi *dw_hdmi, void *data, + const struct drm_display_info *display, + const struct drm_display_mode *mode) +{ + /* + * Just release PHY core from reset, all other power management is done + * by the PHY driver. + */ + dw_hdmi_phy_reset_active_low(dw_hdmi); + + return 0; +} + +static void imx8mp_hdmi_phy_disable(struct dw_hdmi *dw_hdmi, void *data) +{ +} + +static const struct dw_hdmi_phy_ops imx8mp_hdmi_phy_ops = { + .init = imx8mp_hdmi_phy_init, + .disable = imx8mp_hdmi_phy_disable, + .read_hpd = dw_hdmi_phy_read_hpd, + .update_hpd = dw_hdmi_phy_update_hpd, + .setup_hpd = dw_hdmi_phy_setup_hpd, +}; + +static int imx_dw_hdmi_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct dw_hdmi_plat_data *plat_data; + struct imx_hdmi *hdmi; + + hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); + if (!hdmi) + return -ENOMEM; + + plat_data = &hdmi->plat_data; + + hdmi->pixclk = devm_clk_get(dev, "pix"); + if (IS_ERR(hdmi->pixclk)) + return dev_err_probe(dev, PTR_ERR(hdmi->pixclk), + "Unable to get pixel clock\n"); + + plat_data->mode_valid = imx8mp_hdmi_mode_valid; + plat_data->phy_ops = &imx8mp_hdmi_phy_ops; + plat_data->phy_name = "SAMSUNG HDMI TX PHY"; + plat_data->priv_data = hdmi; + + hdmi->dw_hdmi = dw_hdmi_probe(pdev, plat_data); + if (IS_ERR(hdmi->dw_hdmi)) + return PTR_ERR(hdmi->dw_hdmi); + + platform_set_drvdata(pdev, hdmi); + + return 0; +} + +static int imx_dw_hdmi_remove(struct platform_device *pdev) +{ + struct dw_hdmi *hdmi = platform_get_drvdata(pdev); + + dw_hdmi_remove(hdmi); + + return 0; +} + +static const struct of_device_id imx_dw_hdmi_of_table[] = { + { .compatible = "fsl,imx8mp-hdmi" }, + { /* Sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, imx_dw_hdmi_of_table); + +static struct platform_driver im_dw_hdmi_platform_driver = { + .probe = imx_dw_hdmi_probe, + .remove = imx_dw_hdmi_remove, + .driver = { + .name = "imx-dw-hdmi", + .of_match_table = imx_dw_hdmi_of_table, + }, +}; + +module_platform_driver(im_dw_hdmi_platform_driver); + +MODULE_DESCRIPTION("i.MX8M HDMI encoder driver"); +MODULE_LICENSE("GPL");