From patchwork Thu Mar 18 12:39:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kiran Gunda X-Patchwork-Id: 405076 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, 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 AEF05C433DB for ; Thu, 18 Mar 2021 12:41:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7206F64F6F for ; Thu, 18 Mar 2021 12:41:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230490AbhCRMkh (ORCPT ); Thu, 18 Mar 2021 08:40:37 -0400 Received: from a0.mail.mailgun.net ([198.61.254.59]:51031 "EHLO a0.mail.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231288AbhCRMk1 (ORCPT ); Thu, 18 Mar 2021 08:40:27 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1616071226; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=zMH4KZLVuj26V2WKbkO37kkmJ5LZVxtii7JpvkmoOp0=; b=qkgY0HpKyEM+BTQG0WKM6ON7A4sH3Zb8WvlQM+CM5y14LDBaG8BWuLxQ2K6f0WU1T7tVTgtB lPaZMzm0OaI7z9SVwBNssPVQ5kM/9g4mY5f5tdJ18stLTyYQqdKud8e7fbXwmL3BQ0jW8pFl 1MFmw72LK9Q62qYPPTlSsV0Hvws= X-Mailgun-Sending-Ip: 198.61.254.59 X-Mailgun-Sid: WyJkODczOCIsICJsaW51eC1sZWRzQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n07.prod.us-east-1.postgun.com with SMTP id 60534a301de5dd7b99bc56e4 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 18 Mar 2021 12:40:16 GMT Sender: kgunda=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id EA1D7C433C6; Thu, 18 Mar 2021 12:40:15 +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 BCBE5C43469; Thu, 18 Mar 2021 12:40:09 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org BCBE5C43469 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, Andy Gross , linux-arm-msm@vger.kernel.org, linux-fbdev@vger.kernel.org Cc: Kiran Gunda Subject: [PATCH V5 1/2] backlight: qcom-wled: Fix FSC update issue for WLED5 Date: Thu, 18 Mar 2021 18:09:39 +0530 Message-Id: <1616071180-24493-2-git-send-email-kgunda@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1616071180-24493-1-git-send-email-kgunda@codeaurora.org> References: <1616071180-24493-1-git-send-email-kgunda@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Currently, for WLED5, the FSC (Full scale current) setting is not updated properly due to driver toggling the wrong register after an FSC update. On WLED5 we should only toggle the MOD_SYNC bit after a brightness update. For an FSC update we need to toggle the SYNC bits instead. Fix it by adopting the common wled3_sync_toggle() for WLED5 and introducing new code to the brightness update path to compensate. Signed-off-by: Kiran Gunda Reviewed-by: Daniel Thompson --- drivers/video/backlight/qcom-wled.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index fc8b443..e9fbe24 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -348,7 +348,7 @@ static int wled3_sync_toggle(struct wled *wled) return rc; } -static int wled5_sync_toggle(struct wled *wled) +static int wled5_mod_sync_toggle(struct wled *wled) { int rc; u8 val; @@ -445,10 +445,23 @@ static int wled_update_status(struct backlight_device *bl) goto unlock_mutex; } - rc = wled->wled_sync_toggle(wled); - if (rc < 0) { - dev_err(wled->dev, "wled sync failed rc:%d\n", rc); - goto unlock_mutex; + if (wled->version < 5) { + rc = wled->wled_sync_toggle(wled); + if (rc < 0) { + dev_err(wled->dev, "wled sync failed rc:%d\n", rc); + goto unlock_mutex; + } + } else { + /* + * For WLED5 toggling the MOD_SYNC_BIT updates the + * brightness + */ + rc = wled5_mod_sync_toggle(wled); + if (rc < 0) { + dev_err(wled->dev, "wled mod sync failed rc:%d\n", + rc); + goto unlock_mutex; + } } } @@ -1459,7 +1472,7 @@ static int wled_configure(struct wled *wled) size = ARRAY_SIZE(wled5_opts); *cfg = wled5_config_defaults; wled->wled_set_brightness = wled5_set_brightness; - wled->wled_sync_toggle = wled5_sync_toggle; + wled->wled_sync_toggle = wled3_sync_toggle; wled->wled_cabc_config = wled5_cabc_config; wled->wled_ovp_delay = wled5_ovp_delay; wled->wled_auto_detection_required =