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 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 A4438C43334 for ; Wed, 13 Jul 2022 08:24:23 +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:References:In-Reply-To: Date:CC:To:From:Subject:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2p8a8J2HJOpp6qomyZXU2IwigporpYh5CUVa29F0D/o=; b=XMHQ+1vGXTwzoS UJprTxJychFYX/xb2Mri+Ruml34mJXYXef/+UiZMRSpr76Szf9pPlIzBjpjmyVh7jFivbpVsZfcag pmM2K4Bn7Za/MlKWwOOBaw7UEUAknm207Sug573lM4izaMkwrdafISs1nao6yJ1bIlYmZh59WTHdP v5C0mGVVBr+mysb2rEg8ytUAVJgFcfYptsIIZTuLFzNL/FvwLGvgYB4lDNonkNZlGb2uaPb2v4fhO Oy3jXUJF2zDkZ60Q/dbbbKxxYc4Y0g84gZGGUkhlJ6ffS3zZ5zT3YQgLlYD1SX0/BBKgfa8dcQv22 +R6mNs7KvSWBljOhkSbg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oBXeM-001cB5-9G; Wed, 13 Jul 2022 08:23:14 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oBXeA-001c4g-Qu; Wed, 13 Jul 2022 08:23:04 +0000 X-UUID: 291d4c12c8a748ecb83138c161269837-20220713 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:70ca5fad-6d2e-404a-8d39-e17aa8151be0,OB:0,LO B:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:0 X-CID-META: VersionHash:0f94e32,CLOUDID:59a8da32-b9e4-42b8-b28a-6364427c76bb,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:0,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 291d4c12c8a748ecb83138c161269837-20220713 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 824815901; Wed, 13 Jul 2022 01:22:53 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) 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 15.2.792.3; Wed, 13 Jul 2022 16:22:15 +0800 Received: from mtksdccf07 (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.3 via Frontend Transport; Wed, 13 Jul 2022 16:22:15 +0800 Message-ID: <6ba15d8532b726bd1a16cf2956140b2cba5d74f7.camel@mediatek.com> Subject: Re: [PATCH v14 05/10] drm/mediatek: Add MT8195 Embedded DisplayPort driver From: CK Hu To: Bo-Chen Chen , , , , , , , , , , CC: , , , , , , , , , , , , Date: Wed, 13 Jul 2022 16:22:15 +0800 In-Reply-To: <20220712111223.13080-6-rex-bc.chen@mediatek.com> References: <20220712111223.13080-1-rex-bc.chen@mediatek.com> <20220712111223.13080-6-rex-bc.chen@mediatek.com> X-Mailer: Evolution 3.28.5-0ubuntu0.18.04.2 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220713_012302_915913_D5712096 X-CRM114-Status: GOOD ( 22.89 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, Bo-Chen: On Tue, 2022-07-12 at 19:12 +0800, Bo-Chen Chen wrote: > From: Markus Schneider-Pargmann > > This patch adds a embedded displayport driver for the MediaTek mt8195 > SoC. > > It supports the MT8195, the embedded DisplayPort units. It offers > DisplayPort 1.4 with up to 4 lanes. > > The driver creates a child device for the phy. The child device will > never exist without the parent being active. As they are sharing a > register range, the parent passes a regmap pointer to the child so > that > both can work with the same register range. The phy driver sets > device > data that is read by the parent to get the phy device that can be > used > to control the phy properties. > > This driver is based on an initial version by > Jitao shi > > Signed-off-by: Markus Schneider-Pargmann > Signed-off-by: Guillaume Ranquet > Signed-off-by: Bo-Chen Chen > --- [snip] > + > +static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge, > + struct drm_bridge_state > *bridge_state, > + struct drm_crtc_state > *crtc_state, > + struct drm_connector_state > *conn_state) > +{ > + struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge); > + struct drm_crtc *crtc = conn_state->crtc; > + unsigned int input_bus_format; > + > + input_bus_format = bridge_state->input_bus_cfg.format; > + > + dev_dbg(mtk_dp->dev, "input format 0x%04x, output format > 0x%04x\n", > + bridge_state->input_bus_cfg.format, > + bridge_state->output_bus_cfg.format); > + > + if (input_bus_format == MEDIA_BUS_FMT_YUYV8_1X16) > + mtk_dp->info.format = DP_PIXELFORMAT_YUV422; > + else > + mtk_dp->info.format = DP_PIXELFORMAT_RGB; > + > + if (!crtc) { > + drm_err(mtk_dp->drm_dev, > + "Can't enable bridge as connector state doesn't > have a crtc\n"); > + return -EINVAL; > + } > + > + mtk_dp_parse_drm_mode_timings(mtk_dp, &crtc_state- > >adjusted_mode); > + if (mtk_dp_parse_capabilities(mtk_dp)) { mtk_dp_bridge_atomic_enable() would call mtk_dp_parse_capabilities(), so this is redundant. Regards, CK > + drm_err(mtk_dp->drm_dev, > + "Can't enable bridge as nothing is plugged > in\n"); > + return -EINVAL; > + } > + > + return 0; > +} > + _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel