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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16956C43334 for ; Tue, 21 Jun 2022 06:02:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345110AbiFUGCl (ORCPT ); Tue, 21 Jun 2022 02:02:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34390 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344649AbiFUGCg (ORCPT ); Tue, 21 Jun 2022 02:02:36 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0EEE2222A4; Mon, 20 Jun 2022 23:02:34 -0700 (PDT) X-UUID: d13e0d2bb95c46bdb5565224bbad7c1a-20220621 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.6,REQID:46f7eb74-bb30-45b8-a74b-01ebac6c9d2d,OB:10,L OB:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:45,FILE:0,RULE:Release_Ham,AC TION:release,TS:45 X-CID-INFO: VERSION:1.1.6,REQID:46f7eb74-bb30-45b8-a74b-01ebac6c9d2d,OB:10,LOB :0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:45,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:45 X-CID-META: VersionHash:b14ad71,CLOUDID:8e1014ea-f7af-4e69-92ee-0fd74a0c286c,C OID:128492dad9fc,Recheck:0,SF:28|17|19|48,TC:nil,Content:0,EDM:-3,IP:nil,U RL:1,File:nil,QS:nil,BEC:nil,COL:0 X-UUID: d13e0d2bb95c46bdb5565224bbad7c1a-20220621 Received: from mtkcas10.mediatek.inc [(172.21.101.39)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 410090368; Tue, 21 Jun 2022 14:02:31 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Tue, 21 Jun 2022 14:02:30 +0800 Received: from mtksdccf07 (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Tue, 21 Jun 2022 14:02:30 +0800 Message-ID: <0d35d7b6e0677b6eb1118c5a180229bfbdc77e7b.camel@mediatek.com> Subject: Re: [PATCH v12 13/14] drm/mediatek: dpi: Only enable dpi after the bridge is enabled From: Rex-BC Chen To: CK Hu , , , , , , , CC: , , , , , , , , , , Date: Tue, 21 Jun 2022 14:02:30 +0800 In-Reply-To: References: <20220620121028.29234-1-rex-bc.chen@mediatek.com> <20220620121028.29234-14-rex-bc.chen@mediatek.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-MTK: N Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On Tue, 2022-06-21 at 11:18 +0800, CK Hu wrote: > Hi, Bo-Chen: > > On Mon, 2022-06-20 at 20:10 +0800, Bo-Chen Chen wrote: > > From: Guillaume Ranquet > > > > Enabling the dpi too early causes glitches on screen. > > > > Move the call to mtk_dpi_enable() at the end of the bridge_enable > > callback to ensure everything is setup properly before enabling > > dpi. > > > > Fixes: f89c696e7f63 ("drm/mediatek: mtk_dpi: Convert to bridge > > driver") > > I think this problem happen in the first patch [1]. > > [1] > https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/commit/drivers/gpu/drm/mediatek/mtk_dpi.c?h=mediatek-drm-next&id=9e629c17aa8d7a75b8c1d99ed42892cd8ba7cdc4 > > Regards, > CK > ok, I will fix this. BRs, Bo-Chen > > Signed-off-by: Guillaume Ranquet > > Signed-off-by: Bo-Chen Chen > > --- > > drivers/gpu/drm/mediatek/mtk_dpi.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c > > b/drivers/gpu/drm/mediatek/mtk_dpi.c > > index fc76ccad0a82..220e9b18e2cd 100644 > > --- a/drivers/gpu/drm/mediatek/mtk_dpi.c > > +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c > > @@ -486,7 +486,6 @@ static int mtk_dpi_power_on(struct mtk_dpi > > *dpi) > > if (dpi->pinctrl && dpi->pins_dpi) > > pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi); > > > > - mtk_dpi_enable(dpi); > > return 0; > > > > err_pixel: > > @@ -731,6 +730,7 @@ static void mtk_dpi_bridge_enable(struct > > drm_bridge *bridge) > > > > mtk_dpi_power_on(dpi); > > mtk_dpi_set_display_mode(dpi, &dpi->mode); > > + mtk_dpi_enable(dpi); > > } > > > > static enum drm_mode_status > >