From patchwork Wed Nov 9 10:00:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WGlubGVpIExlZSAo5p2O5piV56OKKQ==?= X-Patchwork-Id: 13037340 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 A4D1CC4332F for ; Wed, 9 Nov 2022 10:32:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=7LAFfilXgbTas+9sa5PDI+OpCj8w6R71bFY0dMcU/mI=; b=O37EF9JhDFXYuu C3XtxNeNN59789DvfHlzNoajmVRv0+yPr+OokFMTkouJ9T0wo62YIdg4cLizDUGWQ+btKOQmtwPTi DMWFiTl2SjPHJPBdtN/Wmf75k8YlQEk9zfIXAd5FTfB4IGeatO0bRd9E0ShBSxqJURH1K+XR9i/Mv 5up5PdJ9p1bG2svbHhSWTixpxETkKbS53PQ8WoemfOzLw+Rr1KO3V6vfJMohUD6gYy2C7cDGwolW3 3TSod/Dq1FHWAc4IvSeYv7IG8Ji0lWb6CM6TwruBAJBnkX/UQvX6QCtRZQ5cRxHZmXSOR/gubp2kR PhfSu093aDAynUD2UfKw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1osiMW-00Cdgh-FZ; Wed, 09 Nov 2022 10:31:16 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1osiMT-00Cdfr-TR; Wed, 09 Nov 2022 10:31:15 +0000 X-UUID: 878bcef449984e5bb4b5c64f49dff358-20221109 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=i0RvSmzfXal4CwyktVc7SkL+bv7kfZ77IrYMKCrSjfA=; b=F5WJl9+sFbZm59O9XDcWPczxSQux4+XoD9Wz/L0Y+ksyUKMmFNyj9iTrAPQ4OqXFBzvioxXYsTHQ5iUQ0BAoFDPifEu7i+ftjyR0VB7nE2Hw1cD4hlXQjphgmyhLVdb6OMzYJOy6Rg9s2OOqtXTjp8v1wxVab3yXMWVA2qv2AXk=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.12,REQID:6baa1e93-4dc8-437e-b02d-26f9e448a701,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:62cd327,CLOUDID:453bcc50-b7af-492d-8b40-b1032f90ce11,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: 878bcef449984e5bb4b5c64f49dff358-20221109 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1579690227; Wed, 09 Nov 2022 03:31:06 -0700 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by mtkmbs13n1.mediatek.inc (172.21.101.193) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Wed, 9 Nov 2022 18:01:02 +0800 Received: from mszsdaap41.gcn.mediatek.inc (10.16.6.141) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Wed, 9 Nov 2022 18:01:01 +0800 From: To: , , , , , CC: , , , , , Xinlei Lee Subject: [PATCH v4] drm: mediatek: Modify dpi power on/off sequence. Date: Wed, 9 Nov 2022 18:00:59 +0800 Message-ID: <1667988059-8635-1-git-send-email-xinlei.lee@mediatek.com> X-Mailer: git-send-email 2.6.4 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221109_023113_960899_A56E8BF3 X-CRM114-Status: GOOD ( 10.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Xinlei Lee Modify dpi power on/off sequence so that the first gpio operation will take effect. Fixes: 6bd4763fd532 ("drm/mediatek: set dpi pin mode to gpio low to avoid leakage current") Signed-off-by: Xinlei Lee --- change note: v3: Moved pull-down pin control after mtk_dpi_power_off. v2: Remove the empty line between Fixes: and S-o-b. v1: Rebase on linus/master v6.1-rc1. Change nothing. Because dpi power_on/off is protected by dpi->refcount, the first time it cannot be powered on and off successfully, it will cause leakage. --- --- drivers/gpu/drm/mediatek/mtk_dpi.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index 508a6d994e83..1f5d39a4077c 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -461,9 +461,6 @@ static void mtk_dpi_power_off(struct mtk_dpi *dpi) if (--dpi->refcount != 0) return; - if (dpi->pinctrl && dpi->pins_gpio) - pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); - mtk_dpi_disable(dpi); clk_disable_unprepare(dpi->pixel_clk); clk_disable_unprepare(dpi->engine_clk); @@ -488,9 +485,6 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi) goto err_pixel; } - if (dpi->pinctrl && dpi->pins_dpi) - pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); - return 0; err_pixel: @@ -721,12 +715,18 @@ static void mtk_dpi_bridge_disable(struct drm_bridge *bridge) struct mtk_dpi *dpi = bridge_to_dpi(bridge); mtk_dpi_power_off(dpi); + + if (dpi->pinctrl && dpi->pins_gpio) + pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio); } static void mtk_dpi_bridge_enable(struct drm_bridge *bridge) { struct mtk_dpi *dpi = bridge_to_dpi(bridge); + if (dpi->pinctrl && dpi->pins_dpi) + pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); + mtk_dpi_power_on(dpi); mtk_dpi_set_display_mode(dpi, &dpi->mode); mtk_dpi_enable(dpi);