From nobody Fri Sep 20 12:45:38 2024 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 9231FEE4993 for ; Wed, 23 Aug 2023 10:03:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233881AbjHWKDL (ORCPT ); Wed, 23 Aug 2023 06:03:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233411AbjHWJsE (ORCPT ); Wed, 23 Aug 2023 05:48:04 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 196EC72A5 for ; Wed, 23 Aug 2023 02:20:41 -0700 (PDT) X-UUID: 514216f2419611ee9cb5633481061a41-20230823 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=uetrbrfWrgD400OH1ojtvDiq8JdXohR2zwXYZOz9U4I=; b=EaTd+3oXhGAg3ImJSZ03o5sJ8bG3Cyn++9YVsciV0iUqNvxSdekYi5RbAFD1KdB2GId1fedJ1cxd7eeRX8kHyz/oYVUOoiEeUG9p0eu9NBapcTlwMrH2wVbNCQuzY0lGIxUA5t/5P4E5STfEIixsJpXq3yNdba5TbocLJ40vBYw=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.31,REQID:c8c4894b-af02-4e88-b8e9-0876ce9f5bb6,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:95 X-CID-INFO: VERSION:1.1.31,REQID:c8c4894b-af02-4e88-b8e9-0876ce9f5bb6,IP:0,URL :0,TC:0,Content:0,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTION :quarantine,TS:95 X-CID-META: VersionHash:0ad78a4,CLOUDID:c996a81f-33fd-4aaa-bb43-d3fd68d9d5ae,B ulkID:23082317203649PNTAB8,BulkQuantity:1,Recheck:0,SF:38|29|28|17|19|48,T C:nil,Content:0,EDM:-3,IP:nil,URL:11|1,File:nil,Bulk:40,QS:nil,BEC:nil,COL :0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SDM,TF_CID_SPAM_ASC,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD, TF_CID_SPAM_ULN,TF_CID_SPAM_SNR X-UUID: 514216f2419611ee9cb5633481061a41-20230823 Received: from mtkmbs14n2.mediatek.inc [(172.21.101.76)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 513278503; Wed, 23 Aug 2023 17:20:35 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 23 Aug 2023 17:20:34 +0800 Received: from mszsdhlt06.gcn.mediatek.inc (10.16.6.206) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 23 Aug 2023 17:20:34 +0800 From: Shuijing Li To: , , , , , CC: , , , , , , Shuijing Li Subject: [PATCH v2] drm/mediatek: dsi: Add mode_valid callback to DSI bridge Date: Wed, 23 Aug 2023 17:20:47 +0800 Message-ID: <20230823092047.32258-1-shuijing.li@mediatek.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Support IGT (Intel GPU Tools) in Mediatek DSI driver. According to the description of MIPI Alliance Specification for D-PHY=20 Version 1.1, the maximum supported data rate is 1.5Gbps, so add mode_valid callback to dsi bridge to filter out the data rate exceeding the Specification. Signed-off-by: Shuijing Li Reviewed-by: CK Hu --- Changes in v2: Correct descriptions of title and commit message. --- drivers/gpu/drm/mediatek/mtk_dsi.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/= mtk_dsi.c index 7d5250351193..a494e04f0ddf 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -806,6 +806,25 @@ static void mtk_dsi_bridge_atomic_post_disable(struct = drm_bridge *bridge, mtk_dsi_poweroff(dsi); } =20 +static enum drm_mode_status +mtk_dsi_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + struct mtk_dsi *dsi =3D bridge_to_dsi(bridge); + u32 bpp; + + if (dsi->format =3D=3D MIPI_DSI_FMT_RGB565) + bpp =3D 16; + else + bpp =3D 24; + + if (mode->clock * bpp / dsi->lanes > 1500000) + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + static const struct drm_bridge_funcs mtk_dsi_bridge_funcs =3D { .attach =3D mtk_dsi_bridge_attach, .atomic_destroy_state =3D drm_atomic_helper_bridge_destroy_state, @@ -815,6 +834,7 @@ static const struct drm_bridge_funcs mtk_dsi_bridge_fun= cs =3D { .atomic_pre_enable =3D mtk_dsi_bridge_atomic_pre_enable, .atomic_post_disable =3D mtk_dsi_bridge_atomic_post_disable, .atomic_reset =3D drm_atomic_helper_bridge_reset, + .mode_valid =3D mtk_dsi_bridge_mode_valid, .mode_set =3D mtk_dsi_bridge_mode_set, }; =20 --=20 2.40.1