From patchwork Wed May 19 17:35:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 12268043 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33865C433ED for ; Wed, 19 May 2021 17:36:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0802E611BF for ; Wed, 19 May 2021 17:36:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229455AbhESRho (ORCPT ); Wed, 19 May 2021 13:37:44 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:31228 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229932AbhESRhn (ORCPT ); Wed, 19 May 2021 13:37:43 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1621445784; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=T5uQ8fbPK8aH1MVuVCxBKG7xOpj6UgRTWDkmlrf7WdY=; b=YWqsUDYgm/uHMb15KLbF3zyIHCijZgSzF0vn4GOcS7VdDIr+fmo2iRHQ+QdERnfeOdTpECbH S0JyTsKmBpP/Ii/BDZEXfB5UOIQuj6xktGXAxLErSGhzxh2OHFEil2NdCwTnOFG5FGjwz4ly JDAunDLN++U/bhOpbnff0MaU1Fs= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n03.prod.us-east-1.postgun.com with SMTP id 60a54c79b15734c8f9e7b5f3 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 19 May 2021 17:35:52 GMT Sender: khsieh=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 1C308C43143; Wed, 19 May 2021 17:35:52 +0000 (UTC) Received: from khsieh-linux1.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: khsieh) by smtp.codeaurora.org (Postfix) with ESMTPSA id E1FEFC4338A; Wed, 19 May 2021 17:35:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E1FEFC4338A Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=khsieh@codeaurora.org From: Kuogee Hsieh To: robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org, vkoul@kernel.org, agross@kernel.org, bjorn.andersson@linaro.org Cc: abhinavk@codeaurora.org, aravindh@codeaurora.org, khsieh@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 1/2] drm/msm/dp: handle irq_hpd with sink_count = 0 correctly Date: Wed, 19 May 2021 10:35:42 -0700 Message-Id: <1621445742-16505-1-git-send-email-khsieh@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org irq_hpd interrupt should be handled after dongle plugged in and before dongle unplugged. Hence irq_hpd interrupt is enabled at the end of the plugin handle and disabled at the beginning of unplugged handle. Current irq_hpd with sink_count = 0 is wrongly handled same as the dongle unplugged which tears down the mainlink and disables the phy. This patch fixes this problem by only tearing down the mainlink but keeping phy enabled at irq_hpd with sink_count = 0 handle so that next irq_hpd with sink_count =1 can be handled by setup mainlink only. This patch also set dongle into D3 (power off) state at end of handling irq_hpd with sink_count = 0. Changes in v2: -- add ctrl->phy_Power_count Changes in v3: -- del ctrl->phy_Power_count -- add phy_power_off to dp_ctrl_off_link_stream() Changes in v4: -- return immediately if clock disable failed at dp_ctrl_off_link_stream() Changes in v5: -- set dongle to D3 (power off) state at dp_ctrl_off_link_stream() Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_catalog.c | 5 ++-- drivers/gpu/drm/msm/dp/dp_ctrl.c | 55 +++++++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/dp/dp_ctrl.h | 2 ++ drivers/gpu/drm/msm/dp/dp_display.c | 57 +++++++++++++++++++++++++++---------- 4 files changed, 101 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index b1a9b1b..f4f53f2 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -582,10 +582,9 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) u32 reftimer = dp_read_aux(catalog, REG_DP_DP_HPD_REFTIMER); - /* enable HPD interrupts */ + /* enable HPD plug and unplug interrupts */ dp_catalog_hpd_config_intr(dp_catalog, - DP_DP_HPD_PLUG_INT_MASK | DP_DP_IRQ_HPD_INT_MASK - | DP_DP_HPD_UNPLUG_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true); + DP_DP_HPD_PLUG_INT_MASK | DP_DP_HPD_UNPLUG_INT_MASK, true); /* Configure REFTIMER and enable it */ reftimer |= DP_DP_HPD_REFTIMER_ENABLE; diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index 8d59eb9..dbd8943 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1811,6 +1811,61 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl) return ret; } +int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + struct dp_io *dp_io; + struct phy *phy; + int ret; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + dp_io = &ctrl->parser->io; + phy = dp_io->phy; + + /* set dongle to D3 (power off) mode */ + dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, true); + + dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false); + + ret = dp_power_clk_enable(ctrl->power, DP_STREAM_PM, false); + if (ret) { + DRM_ERROR("Failed to disable pixel clocks. ret=%d\n", ret); + return ret; + } + + ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false); + if (ret) { + DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret); + return ret; + } + + phy_power_off(phy); + + /* aux channel down, reinit phy */ + phy_exit(phy); + phy_init(phy); + + DRM_DEBUG_DP("DP off link/stream done\n"); + return ret; +} + +void dp_ctrl_off_phy(struct dp_ctrl *dp_ctrl) +{ + struct dp_ctrl_private *ctrl; + struct dp_io *dp_io; + struct phy *phy; + + ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl); + dp_io = &ctrl->parser->io; + phy = dp_io->phy; + + dp_catalog_ctrl_reset(ctrl->catalog); + + phy_exit(phy); + + DRM_DEBUG_DP("DP off phy done\n"); +} + int dp_ctrl_off(struct dp_ctrl *dp_ctrl) { struct dp_ctrl_private *ctrl; diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h index a836bd3..25e4f75 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.h +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h @@ -23,6 +23,8 @@ int dp_ctrl_host_init(struct dp_ctrl *dp_ctrl, bool flip, bool reset); void dp_ctrl_host_deinit(struct dp_ctrl *dp_ctrl); int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl); int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl); +int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl); +void dp_ctrl_off_phy(struct dp_ctrl *dp_ctrl); int dp_ctrl_off(struct dp_ctrl *dp_ctrl); void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl); void dp_ctrl_isr(struct dp_ctrl *dp_ctrl); diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 0ba71c7..b2a282a 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -337,6 +337,12 @@ static int dp_display_process_hpd_high(struct dp_display_private *dp) dp->dp_display.max_pclk_khz = DP_MAX_PIXEL_CLK_KHZ; dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes; + /* + * set sink to normal operation mode -- D0 + * before dpcd read + */ + dp_link_psm_config(dp->link, &dp->panel->link_info, false); + dp_link_reset_phy_params_vx_px(dp->link); rc = dp_ctrl_on_link(dp->ctrl); if (rc) { @@ -405,11 +411,6 @@ static int dp_display_usbpd_configure_cb(struct device *dev) dp_display_host_init(dp, false); - /* - * set sink to normal operation mode -- D0 - * before dpcd read - */ - dp_link_psm_config(dp->link, &dp->panel->link_info, false); rc = dp_display_process_hpd_high(dp); end: return rc; @@ -570,6 +571,10 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout); } + /* enable HDP irq_hpd/replug interrupt */ + dp_catalog_hpd_config_intr(dp->catalog, + DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, true); + mutex_unlock(&dp->event_mutex); /* uevent will complete connection part */ @@ -619,7 +624,26 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) mutex_lock(&dp->event_mutex); state = dp->hpd_state; - if (state == ST_DISCONNECT_PENDING || state == ST_DISCONNECTED) { + + /* disable irq_hpd/replug interrupts */ + dp_catalog_hpd_config_intr(dp->catalog, + DP_DP_IRQ_HPD_INT_MASK | DP_DP_HPD_REPLUG_INT_MASK, false); + + /* unplugged, no more irq_hpd handle */ + dp_del_event(dp, EV_IRQ_HPD_INT); + + if (state == ST_DISCONNECTED) { + /* triggered by irq_hdp with sink_count = 0 */ + if (dp->link->sink_count == 0) { + dp_ctrl_off_phy(dp->ctrl); + hpd->hpd_high = 0; + dp->core_initialized = false; + } + mutex_unlock(&dp->event_mutex); + return 0; + } + + if (state == ST_DISCONNECT_PENDING) { mutex_unlock(&dp->event_mutex); return 0; } @@ -633,9 +657,8 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) dp->hpd_state = ST_DISCONNECT_PENDING; - /* disable HPD plug interrupt until disconnect is done */ - dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK - | DP_DP_IRQ_HPD_INT_MASK, false); + /* disable HPD plug interrupts */ + dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, false); hpd->hpd_high = 0; @@ -652,8 +675,8 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) reinit_completion(&dp->audio_comp); dp_display_handle_plugged_change(g_dp_display, false); - dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK | - DP_DP_IRQ_HPD_INT_MASK, true); + /* enable HDP plug interrupt to prepare for next plugin */ + dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK, true); /* uevent will complete disconnection part */ mutex_unlock(&dp->event_mutex); @@ -684,7 +707,7 @@ static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data) /* irq_hpd can happen at either connected or disconnected state */ state = dp->hpd_state; - if (state == ST_DISPLAY_OFF) { + if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) { mutex_unlock(&dp->event_mutex); return 0; } @@ -903,9 +926,13 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data) dp_display->audio_enabled = false; - dp_ctrl_off(dp->ctrl); - - dp->core_initialized = false; + /* triggered by irq_hpd with sink_count = 0 */ + if (dp->link->sink_count == 0) { + dp_ctrl_off_link_stream(dp->ctrl); + } else { + dp_ctrl_off(dp->ctrl); + dp->core_initialized = false; + } dp_display->power_on = false;