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 C66FDC433EF for ; Tue, 7 Jun 2022 09:20:44 +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=DJatz74Cael/PtyxwO68mumG45aNmc75z56DVoIbvEY=; b=Pu7tLmgPuMKqi7 M16eSsldLJYRd7TvJYz4VW8XuDvmqvyqBtz6J0CuIecuxB+i8h2TN8/aKX2vWdDsXo6O0iCxrSAYI wTajJq+IJ3Afh4qtcJrG4Sapo/GOwrG1L7vbHZZBwQhMp3cpBvGj0m2rK2A1zl61RI2v+WBdOtCoK 5rJ/onBgIaC7BlOS9GMNdOZPeq8TAdvDuNJr1vWyNtXCQk5jP+mBtFwYhjSg02w0K8FRJ0oMMX8l1 HyNlCPz5OLhDcgHsOmF4VGh4Uax8fS+9fnwy81C75v5QLslFu+VUH2Qu+A1fpcxb8KJLAb0tiCfuI ilpf/ovRGxfjVfz9LIXA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nyVMq-0069ua-IY; Tue, 07 Jun 2022 09:19:17 +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 1nyVCh-0064bV-AS; Tue, 07 Jun 2022 09:08:48 +0000 X-UUID: aa5ba9292d50432c95462e827e128eda-20220607 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.5,REQID:82a60053-99fa-47e3-aa70-f8e5315ddf93,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:5 X-CID-META: VersionHash:2a19b09,CLOUDID:2df3767e-c8dc-403a-96e8-6237210dceee,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:0,BEC:nil X-UUID: aa5ba9292d50432c95462e827e128eda-20220607 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 977536305; Tue, 07 Jun 2022 02:05:59 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by MTKMBS62DR.mediatek.inc (172.29.94.18) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 7 Jun 2022 02:04:15 -0700 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Tue, 7 Jun 2022 17:04:13 +0800 Received: from mtksdccf07 (172.21.84.99) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Tue, 7 Jun 2022 17:04:13 +0800 Message-ID: <77cdd43716b49aaffd9e052f4fe2c88e198ea7ff.camel@mediatek.com> Subject: Re: [PATCH v10 18/21] drm/mediatek: Add mt8195 Embedded DisplayPort driver From: CK Hu To: Rex-BC Chen , Guillaume Ranquet , Chun-Kuang Hu , "Philipp Zabel" , David Airlie , "Daniel Vetter" , Rob Herring , "Krzysztof Kozlowski" , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Matthias Brugger , Chunfeng Yun , "Kishon Vijay Abraham I" , Vinod Koul , "Helge Deller" , Jitao shi CC: Markus Schneider-Pargmann , , , , , , , Date: Tue, 7 Jun 2022 17:04:13 +0800 In-Reply-To: <20220523104758.29531-19-granquet@baylibre.com> References: <20220523104758.29531-1-granquet@baylibre.com> <20220523104758.29531-19-granquet@baylibre.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-20220607_020847_412262_D627BCE5 X-CRM114-Status: GOOD ( 23.72 ) 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, Rex: On Mon, 2022-05-23 at 12:47 +0200, Guillaume Ranquet wrote: > From: Markus Schneider-Pargmann > > This patch adds a 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 > Jason-JH.Lin . > > Signed-off-by: Markus Schneider-Pargmann > Signed-off-by: Guillaume Ranquet > --- [snip] > + > +static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev) > +{ > + struct mtk_dp *mtk_dp = dev; > + int event; > + u8 buf[DP_RECEIVER_CAP_SIZE] = {}; > + > + event = mtk_dp_plug_state(mtk_dp) ? connector_status_connected > : > + connector_status_disc > onnected; > + > + if (event < 0) > + return IRQ_HANDLED; > + > + if (mtk_dp->drm_dev) { > + dev_info(mtk_dp->dev, "drm_helper_hpd_irq_event\n"); > + drm_helper_hpd_irq_event(mtk_dp->bridge.dev); > + } > + > + if (mtk_dp->train_info.cable_state_change) { > + mtk_dp->train_info.cable_state_change = false; > + > + mtk_dp->train_state = MTK_DP_TRAIN_STATE_STARTUP; > + > + if (!mtk_dp->train_info.cable_plugged_in || > + !mtk_dp_plug_state(mtk_dp)) { > + mtk_dp_video_mute(mtk_dp, true); For eDP, when does 'unplug' happen? Explain this or move unplug processing to DP patch. Regards, CK > + > + mtk_dp_initialize_priv_data(mtk_dp); > + mtk_dp_set_idle_pattern(mtk_dp, true); > + if (mtk_dp->has_fec) > + mtk_dp_fec_enable(mtk_dp, false); > + > + mtk_dp_update_bits(mtk_dp, > MTK_DP_TOP_PWR_STATE, > + DP_PWR_STATE_BANDGAP_TPLL, > + DP_PWR_STATE_MASK); > + } else { > + mtk_dp_update_bits(mtk_dp, > MTK_DP_TOP_PWR_STATE, > + DP_PWR_STATE_BANDGAP_TPLL_LA > NE, > + DP_PWR_STATE_MASK); > + drm_dp_read_dpcd_caps(&mtk_dp->aux, buf); > + mtk_dp->train_info.link_rate = > + min_t(int, mtk_dp->max_linkrate, > + buf[mtk_dp->max_linkrate]); > + mtk_dp->train_info.lane_count = > + min_t(int, mtk_dp->max_lanes, > + drm_dp_max_lane_count(buf)); > + } > + } > + > + if (mtk_dp->train_info.irq_status & MTK_DP_HPD_INTERRUPT) { > + dev_dbg(mtk_dp->dev, "MTK_DP_HPD_INTERRUPT\n"); > + mtk_dp->train_info.irq_status &= ~MTK_DP_HPD_INTERRUPT; > + mtk_dp_hpd_sink_event(mtk_dp); > + } > + > + return IRQ_HANDLED; > +} > + _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel