From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A0AF2C43461 for ; Mon, 17 May 2021 20:10:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8485161002 for ; Mon, 17 May 2021 20:10:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238631AbhEQULa (ORCPT ); Mon, 17 May 2021 16:11:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237959AbhEQULL (ORCPT ); Mon, 17 May 2021 16:11:11 -0400 Received: from mail-pl1-x630.google.com (mail-pl1-x630.google.com [IPv6:2607:f8b0:4864:20::630]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A62A3C061761 for ; Mon, 17 May 2021 13:09:53 -0700 (PDT) Received: by mail-pl1-x630.google.com with SMTP id b21so3821535plz.0 for ; Mon, 17 May 2021 13:09:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=tOZl2a0Xn+Y+oYoBUp55w9Z29a1A4HjFAvDLzhVhkqE=; b=eU6UxXe8TD0o/QUCV0Yy+MMbIQLPLTHNNbNuBTC7DkWQuRoGhqVm3tGDTzB4qDOYxD yETi1jd/D3yEQbqMMpM1nEQ/RTTc80vMdtggULBTBM76/Ei21a5xS7ByOrfe3aPvJAcN Dqaz34kIW4/3TYsbnViDkSpc2yP55yNrbq1s8= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=tOZl2a0Xn+Y+oYoBUp55w9Z29a1A4HjFAvDLzhVhkqE=; b=EV3QKhWpJ1rnhFoqDHJCilIM7n2nYmyHAeHfa07ATs7yZ/+Joo4cq2icOaKkXfI3eS 8284DacrKvjPKFb+928EAZ3Fh3gcrsvLwU8ks98uHaKskp3AiHqGuxXe2ECYts5THypc GU57nDimSEJk7WMamMH+np0G3+G45obzhpM2xOh+8c/49wvSw3kdzEO4wA18bZ7tZYKJ xmwTQUhyMQs/OqmFxt4y4jP+zq7XLCnaiWg91k/gAB5CLzVscLD2ThH8AEFpl+w+rv5A 0sWrbNN1EcfugALucKTqe4sQpX1UesFcsdnpcSoJd6FMDDjNTt23WvH2GCY6b7mUB/Vo Wnyg== X-Gm-Message-State: AOAM530Mk539B1IPAump1E5ENy0rjLKomTXUrJlaTCKzB4TIP58/lv7z a654FwUaZNU636Zfx+AQ+0Y8SA== X-Google-Smtp-Source: ABdhPJyTrQXjfhuuJoM4Ts7rTF2Cm+pFj01Va4cSrUA6KTyHc0dawC5/JzLBe/tqlu792cBM94O5kA== X-Received: by 2002:a17:90b:1949:: with SMTP id nk9mr838329pjb.220.1621282193248; Mon, 17 May 2021 13:09:53 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:201:bc91:c597:ded0:7930]) by smtp.gmail.com with ESMTPSA id x19sm9078941pgj.66.2021.05.17.13.09.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 May 2021 13:09:52 -0700 (PDT) From: Douglas Anderson To: Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Sam Ravnborg Cc: Stanislav Lisovskiy , Lyude Paul , Thierry Reding , Stephen Boyd , Bjorn Andersson , linux-arm-msm@vger.kernel.org, Maarten Lankhorst , Linus W , dri-devel@lists.freedesktop.org, robdclark@chromium.org, Steev Klimaszewski , Douglas Anderson , Daniel Vetter , David Airlie , Thierry Reding , linux-kernel@vger.kernel.org Subject: [PATCH v7 05/10] drm/panel: panel-simple: Allow panel-simple be a DP AUX endpoint device Date: Mon, 17 May 2021 13:09:02 -0700 Message-Id: <20210517130450.v7.5.Iada41f76a7342354bae929d0bb3ceba40f27f0ea@changeid> X-Mailer: git-send-email 2.31.1.751.gd2f1c929bd-goog In-Reply-To: <20210517200907.1459182-1-dianders@chromium.org> References: <20210517200907.1459182-1-dianders@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The panel-simple driver can already have devices instantiated as platform devices or MIPI DSI devices. Let's add a 3rd way to instantiate it: as DP AUX endpoint devices. At the moment there is no benefit to instantiating it in this way, but: - In the next patch we'll give it access to the DDC channel via the DP AUX bus. - Possibly in the future we may use this channel to configure the backlight. Signed-off-by: Douglas Anderson --- Changes in v7: - Patch to allow panel-simple to be DP AUX EP new for v7. drivers/gpu/drm/panel/Kconfig | 1 + drivers/gpu/drm/panel/panel-simple.c | 52 +++++++++++++++++++++++++--- 2 files changed, 49 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index ef87d92cdf49..b1ea86d9fdaf 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -82,6 +82,7 @@ config DRM_PANEL_SIMPLE depends on BACKLIGHT_CLASS_DEVICE depends on PM select VIDEOMODE_HELPERS + select DRM_DP_AUX_BUS help DRM panel driver for dumb panels that need at most a regulator and a GPIO to be powered up. Optionally a backlight can be attached so diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index 21939d4352cf..d3b5ae22d939 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -36,6 +36,7 @@ #include #include +#include #include #include @@ -4957,6 +4958,38 @@ static struct mipi_dsi_driver panel_simple_dsi_driver = { .shutdown = panel_simple_dsi_shutdown, }; +static int panel_simple_dp_aux_ep_probe(struct dp_aux_ep_device *aux_ep) +{ + const struct of_device_id *id; + + id = of_match_node(platform_of_match, aux_ep->dev.of_node); + if (!id) + return -ENODEV; + + return panel_simple_probe(&aux_ep->dev, id->data); +} + +static void panel_simple_dp_aux_ep_remove(struct dp_aux_ep_device *aux_ep) +{ + panel_simple_remove(&aux_ep->dev); +} + +static void panel_simple_dp_aux_ep_shutdown(struct dp_aux_ep_device *aux_ep) +{ + panel_simple_shutdown(&aux_ep->dev); +} + +static struct dp_aux_ep_driver panel_simple_dp_aux_ep_driver = { + .driver = { + .name = "panel-simple-dp-aux", + .of_match_table = platform_of_match, /* Same as platform one! */ + .pm = &panel_simple_pm_ops, + }, + .probe = panel_simple_dp_aux_ep_probe, + .remove = panel_simple_dp_aux_ep_remove, + .shutdown = panel_simple_dp_aux_ep_shutdown, +}; + static int __init panel_simple_init(void) { int err; @@ -4965,15 +4998,25 @@ static int __init panel_simple_init(void) if (err < 0) return err; + err = dp_aux_dp_driver_register(&panel_simple_dp_aux_ep_driver); + if (err < 0) + goto err_did_platform_register; + if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) { err = mipi_dsi_driver_register(&panel_simple_dsi_driver); - if (err < 0) { - platform_driver_unregister(&panel_simple_platform_driver); - return err; - } + if (err < 0) + goto err_did_aux_ep_register; } return 0; + +err_did_aux_ep_register: + dp_aux_dp_driver_unregister(&panel_simple_dp_aux_ep_driver); + +err_did_platform_register: + platform_driver_unregister(&panel_simple_platform_driver); + + return err; } module_init(panel_simple_init); @@ -4982,6 +5025,7 @@ static void __exit panel_simple_exit(void) if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) mipi_dsi_driver_unregister(&panel_simple_dsi_driver); + dp_aux_dp_driver_unregister(&panel_simple_dp_aux_ep_driver); platform_driver_unregister(&panel_simple_platform_driver); } module_exit(panel_simple_exit); -- 2.31.1.751.gd2f1c929bd-goog