From patchwork Thu Mar 18 12:39:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kiran Gunda X-Patchwork-Id: 12148093 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=-11.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,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 A5F6BC4332E for ; Thu, 18 Mar 2021 12:41:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7B58D64F78 for ; Thu, 18 Mar 2021 12:41:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231262AbhCRMkh (ORCPT ); Thu, 18 Mar 2021 08:40:37 -0400 Received: from m42-10.mailgun.net ([69.72.42.10]:51511 "EHLO m42-10.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231271AbhCRMkX (ORCPT ); Thu, 18 Mar 2021 08:40:23 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1616071223; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=s6VV7GTQncp21xvrXYojy8gPu45408PlPCy0aMnUmSc=; b=NGPgl1rhwUno16m00Qo+2A9iNL8v//2zGNs0IekzTc38TuOnS4PVLaW8DnkMeCXUygOPRzt6 Cm4TdXuZAnm0AJ/KQ9+GNVt9Xp5QCxNg6odLrz0C4UEH6gqbE1rIU01HNpeNgijtDG4N9hyI dSK4g/QsGdSA4G3jnwU8rQmoFBg= X-Mailgun-Sending-Ip: 69.72.42.10 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-west-2.postgun.com with SMTP id 60534a2a3f267701a4e26bd1 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 18 Mar 2021 12:40:10 GMT Sender: kgunda=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 1A5ADC4346E; Thu, 18 Mar 2021 12:40:09 +0000 (UTC) Received: from kgunda-linux.qualcomm.com (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: kgunda) by smtp.codeaurora.org (Postfix) with ESMTPSA id 508BCC433C6; Thu, 18 Mar 2021 12:40:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 508BCC433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=kgunda@codeaurora.org From: Kiran Gunda To: bjorn.andersson@linaro.org, jingoohan1@gmail.com, lee.jones@linaro.org, b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org, daniel.thompson@linaro.org, jacek.anaszewski@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, mark.rutland@arm.com, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, phone-devel@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, Kiran Gunda Subject: [PATCH V5 0/2] Fix WLED FSC Sync and brightness Sync settings Date: Thu, 18 Mar 2021 18:09:38 +0530 Message-Id: <1616071180-24493-1-git-send-email-kgunda@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org This patch series has the following two WLED fixes 1. As per the current implementation, for WLED5, after the FSC (Full Scale Current) update the driver is incorrectly toggling the MOD_SYNC register instead of toggling the SYNC register. The patch 1/2 fixes this by toggling the SYNC register after FSC update. 2. Currently, the sync bits are set-then-cleared after FSC and brightness update. As per hardware team recommendation the FSC and brightness sync takes place from clear-then-set transition of the sync bits. The patch 2/2 fies this issue. changes from V4: 1. Rebased this patch series on the below patch. "backlight-qcom-wled-Use-sink_addr-for-sync-toggle.patch". Changes from V3: 1. Updated the patch description as per Daneil's suggestion. 2. Added Daniel's "Reviewed-by" tag for patch 2/2. 3. Updated the cover letter to use "set" and "clear" properly. Changes from V2: 1. Added Daniel's "Reviewed-by" tag for patch 1/2. 2. Updated the patch 2/2 description with "set" and "clear" terminology instead of "1" and "0". 3. Updated the cover letter with "set" and "clear" terminology instead of "1" and "0". Changes from V1: 1. Updated the cover letter. 2. Updated the description of the patches as per Daniel's suggestion. Kiran Gunda (2): backlight: qcom-wled: Fix FSC update issue for WLED5 backlight: qcom-wled: Correct the sync_toggle sequence drivers/video/backlight/qcom-wled.c | 37 +++++++++++++++++++++++++------------ 1 file changed, 25 insertions(+), 12 deletions(-)