From patchwork Thu Apr 13 10:09:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Konrad Dybcio X-Patchwork-Id: 82896 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:b0ea:0:b0:3b6:4342:cba0 with SMTP id b10csp930194vqo; Thu, 13 Apr 2023 03:29:38 -0700 (PDT) X-Google-Smtp-Source: AKy350bBT1upNo9eGI9mH3zNC24tDzQXMURGGhzLh3IUFuePXU3CCiInYGONkghw5eTsLASb6aRC X-Received: by 2002:a17:902:d151:b0:1a6:7ed8:84f7 with SMTP id t17-20020a170902d15100b001a67ed884f7mr1642762plt.20.1681381778332; Thu, 13 Apr 2023 03:29:38 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1681381778; cv=none; d=google.com; s=arc-20160816; b=zVNk0ORMfvwLLDsZ36/DHmsHJhGwyueFtvtfD/nztHVinHJO+zVj7T+3drwjt84FGw yKh0ygLYW43p2EaYQqjejDoVBgqTnH0C06hl6ZNxIv/FrTO/MbgVYePql3y80vbqC6+v REihfY9vZ1DFiK76D7q+sqIX1kBZgQmzQEVELcroYAKig2nCoxFrxufQuPSDt328BKld 07OYHdQbUDDvtN3IUk1lYyZ8OrU6oBEAFiy0oPMgnLjNaF8+WF/s+03E/D9D6RcJbIBx nTgtlvnTy448X0BmplyyBTxYBaqZl8w6VskLgXp6QHZFcQsT3ew1bkd/y+rBIjwq50Mr 33BQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:cc:to:in-reply-to:references:message-id :content-transfer-encoding:mime-version:subject:date:from :dkim-signature; bh=8VxPnjG7Ga3tmIOUhMs54Sv+8hbNOJAgCnpbXzAxobQ=; b=zBijWmlaBJ81J/ES9so+kYb+asMKXVdh+GGMGACiWQRjdbKweTRTLjLlC2rHSFnTjj Tbp3AFVGdkzVipuUxmBZfgo9Q1/HBG7wxUTY5oeFj4wWInDrMefBng8j64R4DTlmHKE/ VuviNQqmmyrMLprQZP4Gtgj7r9VPPl00HIjKEfs5sUUTc/ce34TquhSC4uMW17NaWMzv ad+QSn4H+bL+V89Rqu649cf1le74iimgi0OY4nJ77qG1Y1smDk0xJ1suRDZQ9kNV6fer Hln0/yGVubJ5+Z1/D6xoN42qb9q7QEMhcVy31fAM4EFulLdS9u3IVKWmCs0V5zUz/V75 BAgQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=gkNHMjZt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id h13-20020a170902f54d00b001a4f168718bsi1750780plf.585.2023.04.13.03.29.26; Thu, 13 Apr 2023 03:29:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=gkNHMjZt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230383AbjDMKKU (ORCPT + 99 others); Thu, 13 Apr 2023 06:10:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58488 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230288AbjDMKKC (ORCPT ); Thu, 13 Apr 2023 06:10:02 -0400 Received: from mail-lj1-x232.google.com (mail-lj1-x232.google.com [IPv6:2a00:1450:4864:20::232]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A36679755 for ; Thu, 13 Apr 2023 03:09:52 -0700 (PDT) Received: by mail-lj1-x232.google.com with SMTP id bx15so12904956ljb.7 for ; Thu, 13 Apr 2023 03:09:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1681380591; x=1683972591; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=8VxPnjG7Ga3tmIOUhMs54Sv+8hbNOJAgCnpbXzAxobQ=; b=gkNHMjZtMFbejwqHO8md1YUCsEy0fYS+RJS3bjUxHlw0snRh4wvU8AUxIGsEsMLnKa 10et6J2RG6qAOAU1ZLvwzNAADG1ZVdTRZ8LuFsMrwPPvRhVqJ+A16dHEQwnOliK8l2jS QNF+uoFhI+XWvwmi4Dme6LksLIZ1uRlnXMqIxmjTQ8ucJMdJqmJRf+EonV7c1izxks0d 8uzCwK+i2pGFbSngVB/Pu0oelXFgd5MyuGt8hk+MM22/okasA9WDelKwqvFbOWbfk8yl nex5srBTm3qTyHgNJiqlIFbJQ4SXUhW508wun5OiUN7TyZs16fx6YiC87mRDUmiCfiMj XzVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681380591; x=1683972591; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8VxPnjG7Ga3tmIOUhMs54Sv+8hbNOJAgCnpbXzAxobQ=; b=gJgWlvyXO0KOb6/CKVSZF61UBmLZViP8oRxoNgp11tkN0Yj2mkYu9A3HFDIYpN+dxG /q1+EhCdtDzjWFgOgHWoP2e8MXQRsTGhTU0fbsfydDXihYUNGnGou0a6xxb+z2M543a/ wo/P0nmFv1mplzqaYlTn+K71OF3yaWVoWiIyx8UKAP18HIPA/afPamLclECNvNF6QEOO T+vV02azpzDTkKTtnpppsXj8cEyAS0WGD3BjZiEAgOw5E7RZnkH97ywg/i6B3IgHfgVd UBlgs7qOzRm/uUJUFMJ+xBxBDdfGUPuAhS6vXm8EMG3jjdrwhJQsPxkVkOX/Rmxywjqr DRUA== X-Gm-Message-State: AAQBX9eP4snxlgWgwdqsA4X+5eQeqxm6bt5HdfKa5HOMZDn6jYLQkB1t g51p2CoRTtSL/B1pkRjoZvmsiQ== X-Received: by 2002:a2e:7303:0:b0:2a3:3b80:509b with SMTP id o3-20020a2e7303000000b002a33b80509bmr786082ljc.19.1681380590987; Thu, 13 Apr 2023 03:09:50 -0700 (PDT) Received: from [192.168.1.101] (abyl123.neoplus.adsl.tpnet.pl. [83.9.31.123]) by smtp.gmail.com with ESMTPSA id t20-20020a2e9d14000000b002a2e931fc48sm200482lji.140.2023.04.13.03.09.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Apr 2023 03:09:50 -0700 (PDT) From: Konrad Dybcio Date: Thu, 13 Apr 2023 12:09:37 +0200 Subject: [PATCH v2 3/5] drm/panel: nt36523: Add DCS backlight support MIME-Version: 1.0 Message-Id: <20230412-topic-lenovopanel-v2-3-055c3649788e@linaro.org> References: <20230412-topic-lenovopanel-v2-0-055c3649788e@linaro.org> In-Reply-To: <20230412-topic-lenovopanel-v2-0-055c3649788e@linaro.org> To: Jianhua Lu , Neil Armstrong , Sam Ravnborg , David Airlie , Daniel Vetter , Rob Herring , Krzysztof Kozlowski Cc: Marijn Suijten , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Linus Walleij X-Mailer: b4 0.12.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1681380585; l=3553; i=konrad.dybcio@linaro.org; s=20230215; h=from:subject:message-id; bh=dc/Dvzhn8dlfyxlg6IxeHxMIzNiaOkMG9FE6LJmww9g=; b=/V/o7X0Ghnkvl0ZAqJzTcC2sDHw0LtDECLQxC6YaVBgZ1QbjHDaQryqxaoyjqtl7NFzPGPAzzXSJ BXCzY5/qBRM/zoLHtArYov4YGep8+aN5xLG+Q+CtClnBrSautTux X-Developer-Key: i=konrad.dybcio@linaro.org; a=ed25519; pk=iclgkYvtl2w05SSXO5EjjSYlhFKsJ+5OSZBjOkQuEms= X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1763056579434551977?= X-GMAIL-MSGID: =?utf-8?q?1763056579434551977?= This chip supports controlling the backlight via DCS commands, on at least some panels. Add support for doing so. Note this may only concern the NT36523*W* variant. Nobody knows, really, there's no docs. Reviewed-by: Linus Walleij Reviewed-by: Jianhua Lu Signed-off-by: Konrad Dybcio --- drivers/gpu/drm/panel/panel-novatek-nt36523.c | 68 +++++++++++++++++++++++++-- 1 file changed, 65 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/panel/panel-novatek-nt36523.c b/drivers/gpu/drm/panel/panel-novatek-nt36523.c index d30dbbfb67b1..b0466abae812 100644 --- a/drivers/gpu/drm/panel/panel-novatek-nt36523.c +++ b/drivers/gpu/drm/panel/panel-novatek-nt36523.c @@ -5,6 +5,7 @@ * Copyright (c) 2022, 2023 Jianhua Lu */ +#include #include #include #include @@ -53,6 +54,7 @@ struct panel_desc { int (*init_sequence)(struct panel_info *pinfo); bool is_dual_dsi; + bool has_dcs_backlight; }; static inline struct panel_info *to_panel_info(struct drm_panel *panel) @@ -679,6 +681,59 @@ static const struct drm_panel_funcs nt36523_panel_funcs = { .get_modes = nt36523_get_modes, }; +static int nt36523_bl_update_status(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness = backlight_get_brightness(bl); + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_set_display_brightness_large(dsi, brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return 0; +} + +static int nt36523_bl_get_brightness(struct backlight_device *bl) +{ + struct mipi_dsi_device *dsi = bl_get_data(bl); + u16 brightness; + int ret; + + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + ret = mipi_dsi_dcs_get_display_brightness_large(dsi, &brightness); + if (ret < 0) + return ret; + + dsi->mode_flags |= MIPI_DSI_MODE_LPM; + + return brightness; +} + +static const struct backlight_ops nt36523_bl_ops = { + .update_status = nt36523_bl_update_status, + .get_brightness = nt36523_bl_get_brightness, +}; + +static struct backlight_device *nt36523_create_backlight(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + const struct backlight_properties props = { + .type = BACKLIGHT_RAW, + .brightness = 512, + .max_brightness = 4095, + .scale = BACKLIGHT_SCALE_NON_LINEAR, + }; + + return devm_backlight_device_register(dev, dev_name(dev), dev, dsi, + &nt36523_bl_ops, &props); +} + static int nt36523_probe(struct mipi_dsi_device *dsi) { struct device *dev = &dsi->dev; @@ -730,9 +785,16 @@ static int nt36523_probe(struct mipi_dsi_device *dsi) mipi_dsi_set_drvdata(dsi, pinfo); drm_panel_init(&pinfo->panel, dev, &nt36523_panel_funcs, DRM_MODE_CONNECTOR_DSI); - ret = drm_panel_of_backlight(&pinfo->panel); - if (ret) - return dev_err_probe(dev, ret, "failed to get backlight\n"); + if (pinfo->desc->has_dcs_backlight) { + pinfo->panel.backlight = nt36523_create_backlight(dsi); + if (IS_ERR(pinfo->panel.backlight)) + return dev_err_probe(dev, PTR_ERR(pinfo->panel.backlight), + "Failed to create backlight\n"); + } else { + ret = drm_panel_of_backlight(&pinfo->panel); + if (ret) + return dev_err_probe(dev, ret, "Failed to get backlight\n"); + } drm_panel_add(&pinfo->panel);