From patchwork Sat Feb 18 11:17:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pin-yen Lin X-Patchwork-Id: 13145536 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 0833FC64EC4 for ; Sat, 18 Feb 2023 11:17:37 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 33C0B10E1F9; Sat, 18 Feb 2023 11:17:36 +0000 (UTC) Received: from mail-pj1-x102c.google.com (mail-pj1-x102c.google.com [IPv6:2607:f8b0:4864:20::102c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7EA7F10E1F9 for ; Sat, 18 Feb 2023 11:17:34 +0000 (UTC) Received: by mail-pj1-x102c.google.com with SMTP id j2-20020a17090a060200b00229eec90a7fso519813pjj.0 for ; Sat, 18 Feb 2023 03:17:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; 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=s6dHGa2Xgzvsmpkv1OMI3GGLXSZg9rQflTYWwQPQ1MY=; b=JY77n9tlE/HK4ICl9GMTuT3xOecSN1t2rBwKN2r6bw9DpB3ugVZniqFJmEP/ZS6pdn FZrSdrEN79gLPWOMUK+L66wCzzs3r3Q8uln5PXzclN7b87DKiNVjqYU3DiNx/XLz0qPb Of7YZ4EvDZl+ErstHa8fMnpIbvTchMOkO2RII= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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=s6dHGa2Xgzvsmpkv1OMI3GGLXSZg9rQflTYWwQPQ1MY=; b=75TjQpmcFyylnBwwZ2PuKK8YZyCf/BTynEnjK28IgTkRFzfk56cY7KOJSuIW0FHEIu 5VEXScIyojo5fBSByddYuRJmNji+kx+icAw+nlufLdKf/b1uYZGCNfFmTAzFrdNpJoHR 9ipnknhCJfB2Jl6uJH463lDpeOgbVL8Zk3bRNImfIg1crSgNmf4UAJMfq2LLTVpDNi9C OPynUNry4dH7Nf/Gc6licSnYcuj+UlT6/U9PuUMppA+nlDxmVirWznJ95QQYhdCf1lob y2cbYMaVWnaCbqLzk5G0ko2The8IDv1c8JGeg7PV7g4FJchi6FVzGgysJ92+Qn33crSX Pi5w== X-Gm-Message-State: AO0yUKXsvP07Uzn+IVNDH5aEsh8aI5Vz+7DTOAa55IAbl/bpNBqX8rd/ m5W13IwIuzp8M63MW372aO4tIA== X-Google-Smtp-Source: AK7set/hFbuR6/pwEBTsgMDjBxXuhNwX/DV7X+3lXNMmHiMnzFAlbjwwtNwH3GYu9AIwOZM3LSHFcw== X-Received: by 2002:a05:6a20:4e27:b0:c6:858d:81b7 with SMTP id gk39-20020a056a204e2700b000c6858d81b7mr3115816pzb.25.1676719054085; Sat, 18 Feb 2023 03:17:34 -0800 (PST) Received: from treapking.tpe.corp.google.com ([2401:fa00:1:10:88dd:be84:8f65:fec2]) by smtp.gmail.com with ESMTPSA id 23-20020aa79157000000b005a8686b72fcsm4457829pfi.75.2023.02.18.03.17.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 18 Feb 2023 03:17:33 -0800 (PST) From: Pin-yen Lin To: Andrzej Hajda , Neil Armstrong , Robert Foss , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski , Benson Leung Subject: [PATCH v3 2/5] drm/bridge: Add .get_edid callback for anx7688 driver Date: Sat, 18 Feb 2023 19:17:09 +0800 Message-Id: <20230218111712.2380225-3-treapking@chromium.org> X-Mailer: git-send-email 2.39.2.637.g21b0678d19-goog In-Reply-To: <20230218111712.2380225-1-treapking@chromium.org> References: <20230218111712.2380225-1-treapking@chromium.org> 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: chrome-platform@lists.linux.dev, Nicolas Boichat , Chun-Kuang Hu , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Matthias Brugger , devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org, Pin-yen Lin , Guenter Roeck , linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Allow the driver to read EDID when ddc-i2c-bus phandle is present in the device node. Signed-off-by: Pin-yen Lin --- Changes in v3: - New in v3 drivers/gpu/drm/bridge/cros-ec-anx7688.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/gpu/drm/bridge/cros-ec-anx7688.c b/drivers/gpu/drm/bridge/cros-ec-anx7688.c index fa91bdeddef0..a16294c87940 100644 --- a/drivers/gpu/drm/bridge/cros-ec-anx7688.c +++ b/drivers/gpu/drm/bridge/cros-ec-anx7688.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -91,14 +92,24 @@ static bool cros_ec_anx7688_bridge_mode_fixup(struct drm_bridge *bridge, return totalbw >= requiredbw; } +static struct edid *cros_ec_anx7688_get_edid(struct drm_bridge *bridge, + struct drm_connector *connector) +{ + struct cros_ec_anx7688 *anx7688 = bridge_to_cros_ec_anx7688(bridge); + + return drm_get_edid(connector, anx7688->bridge.ddc); +} + static const struct drm_bridge_funcs cros_ec_anx7688_bridge_funcs = { .mode_fixup = cros_ec_anx7688_bridge_mode_fixup, + .get_edid = cros_ec_anx7688_get_edid, }; static int cros_ec_anx7688_bridge_probe(struct i2c_client *client) { struct device *dev = &client->dev; struct cros_ec_anx7688 *anx7688; + struct device_node *phandle; u16 vendor, device, fw_version; u8 buffer[4]; int ret; @@ -153,6 +164,19 @@ static int cros_ec_anx7688_bridge_probe(struct i2c_client *client) DRM_WARN("Old ANX7688 FW version (0x%04x), not filtering\n", fw_version); + + phandle = of_parse_phandle(dev->of_node, "ddc-i2c-bus", 0); + if (phandle) { + anx7688->bridge.ddc = of_get_i2c_adapter_by_node(phandle); + of_node_put(phandle); + if (!anx7688->bridge.ddc) + return -EPROBE_DEFER; + } else { + dev_dbg(dev, "No I2C bus specified, disabling EDID readout\n"); + } + if (anx7688->bridge.ddc) + anx7688->bridge.ops |= DRM_BRIDGE_OP_EDID; + anx7688->bridge.funcs = &cros_ec_anx7688_bridge_funcs; drm_bridge_add(&anx7688->bridge);