From patchwork Wed Jul 27 04:50:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?UmV4LUJDIENoZW4gKOmZs+afj+i+sCk=?= X-Patchwork-Id: 12930053 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 9F062C19F28 for ; Wed, 27 Jul 2022 04:53:16 +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: 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: List-Owner; bh=AHyazSoQhk+0oCsdR1dqsU601rFkgnQY7L7R7tLKe/o=; b=MHG86EA8H3fyvn lAxZ3sKa+86Mp0BxXL7U2J03Lzq9v1I9LJ0BECb8hBGqWQaPJCqKrLhJ76PSfrM9pqN5ZCRroI6Wi d8Bh/NScDW/oKSY9gSPbg+L/LI3LuWq1jC5H/emcLfK0/kc4GnTrJu62ORzUaVJGpsG8Ew7N2nsE6 wet6TOVkwxwwNPrnwiDuRynJ9/HT5OgWln/JaVvt9mULhAc7VfpMLkIMB/6giswm7ab2UCDBWyJyV uU3QW0aFQQrbMzPHQTUoXFr1rO3/w33A5jbpQddTPIyp7lR1eFzF2ut9NaeQ/YwduaZUCzCmR8Fz8 GWtWwAiNZmVSiAU2SgwA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oGZ1q-0093s1-I1; Wed, 27 Jul 2022 04:52:14 +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 1oGZ11-0093EK-3l; Wed, 27 Jul 2022 04:51:27 +0000 X-UUID: b250bcd5f5f0466b92531d1d6ac1ae66-20220726 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:cf667c7f-b680-440e-953a-94d590c4850b,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACT ION:release,TS:0 X-CID-META: VersionHash:0f94e32,CLOUDID:9edf7bc9-5f65-4fda-abe9-f2436fed4c72,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: b250bcd5f5f0466b92531d1d6ac1ae66-20220726 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 669925823; Tue, 26 Jul 2022 21:51:17 -0700 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; Wed, 27 Jul 2022 12:50:39 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Wed, 27 Jul 2022 12:50:39 +0800 From: Bo-Chen Chen To: , , , , , , , , , CC: , , , , , , , , , , , , , , Bo-Chen Chen Subject: [PATCH v15 06/11] drm/mediatek: Add MT8195 External DisplayPort support Date: Wed, 27 Jul 2022 12:50:30 +0800 Message-ID: <20220727045035.32225-7-rex-bc.chen@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20220727045035.32225-1-rex-bc.chen@mediatek.com> References: <20220727045035.32225-1-rex-bc.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220726_215123_221948_C106CCB8 X-CRM114-Status: GOOD ( 19.42 ) 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: Guillaume Ranquet This patch adds External DisplayPort support to the mt8195 eDP driver. Signed-off-by: Guillaume Ranquet Signed-off-by: Bo-Chen Chen Reviewed-by: AngeloGioacchino Del Regno --- drivers/gpu/drm/mediatek/mtk_dp.c | 181 +++++++++++++++++++++----- drivers/gpu/drm/mediatek/mtk_dp_reg.h | 1 + 2 files changed, 146 insertions(+), 36 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_dp.c b/drivers/gpu/drm/mediatek/mtk_dp.c index 06eeecedd49e..ce817cb59445 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp.c +++ b/drivers/gpu/drm/mediatek/mtk_dp.c @@ -103,6 +103,11 @@ static struct regmap_config mtk_dp_regmap_config = { .name = "mtk-dp-registers", }; +static bool mtk_dp_is_edp(struct mtk_dp *mtk_dp) +{ + return mtk_dp->next_bridge; +} + static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b) { return container_of(b, struct mtk_dp, bridge); @@ -341,6 +346,19 @@ static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable) 4 << PGEN_PATTERN_SEL_SHIFT, PGEN_PATTERN_SEL_MASK); } +static bool mtk_dp_plug_state(struct mtk_dp *mtk_dp) +{ + return mtk_dp->train_info.cable_plugged_in; +} + +static bool mtk_dp_plug_state_avoid_pulse(struct mtk_dp *mtk_dp) +{ + bool ret; + + return !(readx_poll_timeout(mtk_dp_plug_state, mtk_dp, ret, ret, + 4000, 7 * 4000)); +} + static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp) { mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, @@ -778,35 +796,67 @@ static void mtk_dp_get_calibration_data(struct mtk_dp *mtk_dp) return; } - cal_data->glb_bias_trim = - check_cal_data_valid(mtk_dp, 1, 0x1e, - (buf[3] >> 27) & 0x1f, 0xf); - cal_data->clktx_impse = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[0] >> 9) & 0xf, 0x8); - cal_data->ln_tx_impsel_pmos[0] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 28) & 0xf, 0x8); - cal_data->ln_tx_impsel_nmos[0] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 24) & 0xf, 0x8); - cal_data->ln_tx_impsel_pmos[1] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 20) & 0xf, 0x8); - cal_data->ln_tx_impsel_nmos[1] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 16) & 0xf, 0x8); - cal_data->ln_tx_impsel_pmos[2] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 12) & 0xf, 0x8); - cal_data->ln_tx_impsel_nmos[2] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 8) & 0xf, 0x8); - cal_data->ln_tx_impsel_pmos[3] = - check_cal_data_valid(mtk_dp, 1, 0xe, - (buf[2] >> 4) & 0xf, 0x8); - cal_data->ln_tx_impsel_nmos[3] = - check_cal_data_valid(mtk_dp, 1, 0xe, buf[2] & 0xf, 0x8); + if (mtk_dp_is_edp(mtk_dp)) { + cal_data->glb_bias_trim = + check_cal_data_valid(mtk_dp, 1, 0x1e, + (buf[3] >> 27) & 0x1f, 0xf); + cal_data->clktx_impse = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[0] >> 9) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[0] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 28) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[0] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 24) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[1] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 20) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[1] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 16) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[2] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 12) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[2] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 8) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[3] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[2] >> 4) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[3] = + check_cal_data_valid(mtk_dp, 1, 0xe, buf[2] & 0xf, 0x8); + } else { + cal_data->glb_bias_trim = + check_cal_data_valid(mtk_dp, 1, 0x1e, + (buf[0] >> 27) & 0x1f, 0xf); + cal_data->clktx_impse = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[0] >> 13) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[0] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 28) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[0] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 24) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[1] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 20) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[1] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 16) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[2] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 12) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[2] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 8) & 0xf, 0x8); + cal_data->ln_tx_impsel_pmos[3] = + check_cal_data_valid(mtk_dp, 1, 0xe, + (buf[1] >> 4) & 0xf, 0x8); + cal_data->ln_tx_impsel_nmos[3] = + check_cal_data_valid(mtk_dp, 1, 0xe, buf[1] & 0xf, 0x8); + } kfree(buf); } @@ -926,7 +976,10 @@ static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable) VIDEO_MUTE_SEL_DP_ENC0_P0_MASK | VIDEO_MUTE_SW_DP_ENC0_P0_MASK); - mtk_dp_sip_atf_call(mtk_dp, MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE, enable); + mtk_dp_sip_atf_call(mtk_dp, + mtk_dp_is_edp(mtk_dp) ? + MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE : + MTK_DP_SIP_ATF_VIDEO_UNMUTE, enable); } static void mtk_dp_power_enable(struct mtk_dp *mtk_dp) @@ -1226,6 +1279,9 @@ static int mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp) drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); usleep_range(2000, 5000); + if (!mtk_dp_plug_state(mtk_dp)) + return -ENODEV; + drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap); train_info->link_rate = min_t(int, mtk_dp->max_linkrate, @@ -1277,6 +1333,9 @@ static int mtk_dp_train_start(struct mtk_dp *mtk_dp) u8 train_limit; u8 max_link_rate; + if (!mtk_dp_plug_state_avoid_pulse(mtk_dp)) + return -ENODEV; + link_rate = mtk_dp->rx_cap[1]; lane_count = mtk_dp->rx_cap[2] & 0x1F; @@ -1412,6 +1471,9 @@ static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev) { struct mtk_dp *mtk_dp = dev; + dev_dbg(mtk_dp->dev, "drm_helper_hpd_irq_event\n"); + drm_helper_hpd_irq_event(mtk_dp->bridge.dev); + if (mtk_dp->train_info.hpd_inerrupt) { dev_dbg(mtk_dp->dev, "MTK_DP_HPD_INTERRUPT\n"); mtk_dp->train_info.hpd_inerrupt = false; @@ -1452,9 +1514,20 @@ static irqreturn_t mtk_dp_hpd_event(int hpd, void *dev) else train_info->cable_plugged_in = false; - mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, - DP_PWR_STATE_BANDGAP_TPLL_LANE, - DP_PWR_STATE_MASK); + if (!train_info->cable_plugged_in) { + mtk_dp_video_mute(mtk_dp, true); + + mtk_dp_initialize_priv_data(mtk_dp); + mtk_dp_set_idle_pattern(mtk_dp, true); + + 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_LANE, + DP_PWR_STATE_MASK); + } } return IRQ_HANDLED; @@ -1499,6 +1572,24 @@ static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp, return 0; } +static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge) +{ + struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge); + enum drm_connector_status ret = connector_status_disconnected; + u8 sink_count = 0; + + if (mtk_dp_is_edp(mtk_dp)) + return connector_status_connected; + + if (mtk_dp_plug_state_avoid_pulse(mtk_dp)) { + drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count); + if (DP_GET_SINK_COUNT(sink_count)) + ret = connector_status_connected; + } + + return ret; +} + static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge, struct drm_connector *connector) { @@ -1512,7 +1603,8 @@ static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge, drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); usleep_range(2000, 5000); - new_edid = drm_get_edid(connector, &mtk_dp->aux.ddc); + if (mtk_dp_plug_state(mtk_dp)) + new_edid = drm_get_edid(connector, &mtk_dp->aux.ddc); if (!enabled) drm_bridge_chain_post_disable(bridge); @@ -1852,6 +1944,7 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = { .atomic_disable = mtk_dp_bridge_atomic_disable, .mode_valid = mtk_dp_bridge_mode_valid, .get_edid = mtk_dp_get_edid, + .detect = mtk_dp_bdg_detect, }; static int mtk_dp_probe(struct platform_device *pdev) @@ -1873,9 +1966,15 @@ static int mtk_dp_probe(struct platform_device *pdev) "failed to request dp irq resource\n"); mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0); - if (IS_ERR(mtk_dp->next_bridge)) + if (IS_ERR(mtk_dp->next_bridge) && + PTR_ERR(mtk_dp->next_bridge) == -ENODEV) { + dev_info(dev, + "No panel connected in devicetree, continue as external DP\n"); + mtk_dp->next_bridge = NULL; + } else if (IS_ERR(mtk_dp->next_bridge)) { return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge), "Failed to get bridge\n"); + } ret = mtk_dp_dt_parse(mtk_dp, pdev); if (ret) @@ -1918,7 +2017,10 @@ static int mtk_dp_probe(struct platform_device *pdev) mtk_dp->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD; - mtk_dp->bridge.type = DRM_MODE_CONNECTOR_eDP; + if (mtk_dp_is_edp(mtk_dp)) + mtk_dp->bridge.type = DRM_MODE_CONNECTOR_eDP; + else + mtk_dp->bridge.type = DRM_MODE_CONNECTOR_DisplayPort; drm_bridge_add(&mtk_dp->bridge); @@ -1945,6 +2047,12 @@ static int mtk_dp_suspend(struct device *dev) { struct mtk_dp *mtk_dp = dev_get_drvdata(dev); + if (mtk_dp_plug_state(mtk_dp)) { + drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3); + /* Ensure the sink is off before shutting down power */ + usleep_range(2000, 3000); + } + mtk_dp_power_disable(mtk_dp); mtk_dp_hwirq_enable(mtk_dp, false); @@ -1978,6 +2086,7 @@ static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend, mtk_dp_resume); static const struct of_device_id mtk_dp_of_match[] = { { .compatible = "mediatek,mt8195-edp-tx" }, + { .compatible = "mediatek,mt8195-dp-tx" }, {}, }; MODULE_DEVICE_TABLE(of, mtk_dp_of_match); diff --git a/drivers/gpu/drm/mediatek/mtk_dp_reg.h b/drivers/gpu/drm/mediatek/mtk_dp_reg.h index 4ff8e9880dc9..59086eb82868 100644 --- a/drivers/gpu/drm/mediatek/mtk_dp_reg.h +++ b/drivers/gpu/drm/mediatek/mtk_dp_reg.h @@ -14,6 +14,7 @@ #define SEC_OFFSET 0x4000 #define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE (BIT(0) | BIT(5)) +#define MTK_DP_SIP_ATF_VIDEO_UNMUTE BIT(5) #define DP_PHY_GLB_BIAS_GEN_00 0 #define RG_XTP_GLB_BIAS_INTR_CTRL GENMASK(20, 16)