From patchwork Sun Oct 17 00:12:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 12564009 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 32B08C433F5 for ; Sun, 17 Oct 2021 00:12:30 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id C639260EB1 for ; Sun, 17 Oct 2021 00:12:29 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org C639260EB1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=denx.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id DC51E6E8E7; Sun, 17 Oct 2021 00:12:26 +0000 (UTC) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8641A6E8E7 for ; Sun, 17 Oct 2021 00:12:22 +0000 (UTC) Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: marex@denx.de) by phobos.denx.de (Postfix) with ESMTPSA id 4189083209; Sun, 17 Oct 2021 02:12:20 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=denx.de; s=phobos-20191101; t=1634429540; bh=1NwdYw1Kty3P/bmZ6Fjrh2EVp6bVutiM8C9BBm3FkS4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EAgcUqJdB/DAyUmIue9tut9eZm47aKRJfzwAFXq/MygwuLx/YD0F2dmKj5IKX8LmG yOYGBo0urOoSay1v1gUYUDYm8EOCrADkMKCkKCmuwCJ5EUiOs77hnk6Ibj7b3UI7a7 V9CT7F/9VAE1KFK8KFY2tHdWT6qpqKgM9Z4TUC2kFajH+u8NLEk09bTfG2BEaIXD7Q oM5qm8CWa1CST5GYwG/oUcOWEYLLZnR/il1wQ/HGhwVxXmiimEl3CnyENiSRCcEEnY xHZ5msHouwi0XwGQN7habTSFTiG3mpiyvACGszz6n4H1D3Mj4egxW/p6Iw9Cm4uROz Zz8+PNAE3ADXA== From: Marek Vasut To: dri-devel@lists.freedesktop.org Cc: Marek Vasut , Laurent Pinchart , Rob Herring , Sam Ravnborg , devicetree@vger.kernel.org Subject: [PATCH v5 2/2] drm/bridge: lvds-codec: Add support for pixel data sampling edge select Date: Sun, 17 Oct 2021 02:12:04 +0200 Message-Id: <20211017001204.299940-2-marex@denx.de> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211017001204.299940-1-marex@denx.de> References: <20211017001204.299940-1-marex@denx.de> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean 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: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The OnSemi FIN3385 Parallel-to-LVDS encoder has a dedicated input line to select input pixel data sampling edge. Add DT property "pclk-sample", not the same as the one used by display timings but rather the same as used by media, and configure bus flags based on this DT property. Signed-off-by: Marek Vasut Cc: Laurent Pinchart Cc: Rob Herring Cc: Sam Ravnborg Cc: devicetree@vger.kernel.org To: dri-devel@lists.freedesktop.org Reviewed-by: Sam Ravnborg --- V2: - Limit the pixelclk-active to encoders only - Update DT binding document V3: - Determine whether this is encoder from connector, i.e. lvds_codec->connector_type == DRM_MODE_CONNECTOR_LVDS V4: - Switch to pclk-sample. Note that the value of this is inverted, so all the existing users of pixelclk-active using previous previous version of this patch must be reworked V5: Rebase on recent linux-next --- drivers/gpu/drm/bridge/lvds-codec.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/gpu/drm/bridge/lvds-codec.c b/drivers/gpu/drm/bridge/lvds-codec.c index f991842a161f..702ea803a743 100644 --- a/drivers/gpu/drm/bridge/lvds-codec.c +++ b/drivers/gpu/drm/bridge/lvds-codec.c @@ -21,6 +21,7 @@ struct lvds_codec { struct device *dev; struct drm_bridge bridge; struct drm_bridge *panel_bridge; + struct drm_bridge_timings timings; struct regulator *vcc; struct gpio_desc *powerdown_gpio; u32 connector_type; @@ -119,6 +120,7 @@ static int lvds_codec_probe(struct platform_device *pdev) struct device_node *bus_node; struct drm_panel *panel; struct lvds_codec *lvds_codec; + u32 val; int ret; lvds_codec = devm_kzalloc(dev, sizeof(*lvds_codec), GFP_KERNEL); @@ -187,12 +189,25 @@ static int lvds_codec_probe(struct platform_device *pdev) } } + /* + * Encoder might sample data on different clock edge than the display, + * for example OnSemi FIN3385 has a dedicated strapping pin to select + * the sampling edge. + */ + if (lvds_codec->connector_type == DRM_MODE_CONNECTOR_LVDS && + !of_property_read_u32(dev->of_node, "pclk-sample", &val)) { + lvds_codec->timings.input_bus_flags = val ? + DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE : + DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE; + } + /* * The panel_bridge bridge is attached to the panel's of_node, * but we need a bridge attached to our of_node for our user * to look up. */ lvds_codec->bridge.of_node = dev->of_node; + lvds_codec->bridge.timings = &lvds_codec->timings; drm_bridge_add(&lvds_codec->bridge); platform_set_drvdata(pdev, lvds_codec);