From patchwork Tue Nov 3 20:49:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 11879851 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=-12.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 F31EEC4741F for ; Wed, 4 Nov 2020 08:23:09 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 897B62222B for ; Wed, 4 Nov 2020 08:23:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="bBoPWktz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 897B62222B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 28D9E89C8D; Wed, 4 Nov 2020 08:22:18 +0000 (UTC) Received: from m42-4.mailgun.net (m42-4.mailgun.net [69.72.42.4]) by gabe.freedesktop.org (Postfix) with ESMTPS id 992606E8F2 for ; Tue, 3 Nov 2020 20:49:33 +0000 (UTC) DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1604436573; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=5kRPA0+9PXFcXYSZG2PKqN9+S/QTlTDWFVisCpDorbk=; b=bBoPWktzGCUb2iLGkAP6xtCuNU8kD1evX+CkzKbzbuHeURFCB7xyPrzG4aC9/Yw/CQxOOh3X FK1zUIuFstP3zrn+2HVwyrySKHDAIhVzBAIa9u5g5KrW0bHQqVL0CfMaDMEJwVCNZckEgYB0 UJeaMSOFqp46sDGSr+hLMEqBQk4= X-Mailgun-Sending-Ip: 69.72.42.4 X-Mailgun-Sid: WyJkOTU5ZSIsICJkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-east-1.postgun.com with SMTP id 5fa1c25d7b1a71d66858ad7f (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 03 Nov 2020 20:49:32 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 0F27BC4A5E2; Tue, 3 Nov 2020 20:49:31 +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 333A8C384F2; Tue, 3 Nov 2020 20:49:27 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 333A8C384F2 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: dri-devel@lists.freedesktop.org, robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org Subject: [PATCH 1/3] drm/msm/dp: deinitialize mainlink if link training failed Date: Tue, 3 Nov 2020 12:49:00 -0800 Message-Id: <20201103204902.11899-2-khsieh@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201103204902.11899-1-khsieh@codeaurora.org> References: <20201103204902.11899-1-khsieh@codeaurora.org> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 04 Nov 2020 08:22:13 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: airlied@linux.ie, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, abhinavk@codeaurora.org, Kuogee Hsieh , tanmay@codeaurora.org, aravindh@codeaurora.org, freedreno@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" DP compo phy have to be enable to start link training. When link training failed phy need to be disabled so that next link traning can be proceed smoothly at next plug in. This patch de-initialize mainlink to disable phy if link training failed. This prevent system crash due to disp_cc_mdss_dp_link_intf_clk stuck at "off" state. This patch also perform checking power_on flag at dp_display_enable() and dp_display_disable() to avoid crashing when unplug cable while display is off. Fixes: fdaf9a5e3c15 (drm/msm/dp: fixes wrong connection state caused by failure of link training) Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_catalog.c | 2 +- drivers/gpu/drm/msm/dp/dp_catalog.h | 2 +- drivers/gpu/drm/msm/dp/dp_ctrl.c | 40 +++++++++++++++++++++++++++-- drivers/gpu/drm/msm/dp/dp_display.c | 15 ++++++++++- drivers/gpu/drm/msm/dp/dp_panel.c | 2 +- 5 files changed, 55 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 4963bfe6a472..c2fe0009b092 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -572,7 +572,7 @@ void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog) dp_write_aux(catalog, REG_DP_DP_HPD_CTRL, DP_DP_HPD_CTRL_HPD_EN); } -u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog) +u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog) { struct dp_catalog_private *catalog = container_of(dp_catalog, struct dp_catalog_private, dp_catalog); diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h index 6d257dbebf29..176a9020a520 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.h +++ b/drivers/gpu/drm/msm/dp/dp_catalog.h @@ -97,7 +97,7 @@ void dp_catalog_ctrl_enable_irq(struct dp_catalog *dp_catalog, bool enable); void dp_catalog_hpd_config_intr(struct dp_catalog *dp_catalog, u32 intr_mask, bool en); void dp_catalog_ctrl_hpd_config(struct dp_catalog *dp_catalog); -u32 dp_catalog_hpd_get_state_status(struct dp_catalog *dp_catalog); +u32 dp_catalog_link_is_connected(struct dp_catalog *dp_catalog); u32 dp_catalog_hpd_get_intr_status(struct dp_catalog *dp_catalog); void dp_catalog_ctrl_phy_reset(struct dp_catalog *dp_catalog); int dp_catalog_ctrl_update_vx_px(struct dp_catalog *dp_catalog, u8 v_level, diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index cee161c8ecc6..c7af040ce252 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1468,6 +1468,30 @@ static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl) return ret; } +static int dp_ctrl_deinitialize_mainlink(struct dp_ctrl_private *ctrl) +{ + struct dp_io *dp_io; + struct phy *phy; + int ret; + + dp_io = &ctrl->parser->io; + phy = dp_io->phy; + + dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, false); + + dp_catalog_ctrl_reset(ctrl->catalog); + + ret = dp_power_clk_enable(ctrl->power, DP_CTRL_PM, false); + if (ret) { + DRM_ERROR("Failed to disable link clocks. ret=%d\n", ret); + } + + phy_power_off(phy); + phy_exit(phy); + + return 0; +} + static int dp_ctrl_link_maintenance(struct dp_ctrl_private *ctrl) { int ret = 0; @@ -1648,8 +1672,7 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl) if (rc) return rc; - while (--link_train_max_retries && - !atomic_read(&ctrl->dp_ctrl.aborted)) { + while (--link_train_max_retries) { rc = dp_ctrl_reinitialize_mainlink(ctrl); if (rc) { DRM_ERROR("Failed to reinitialize mainlink. rc=%d\n", @@ -1664,6 +1687,10 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl) break; } else if (training_step == DP_TRAINING_1) { /* link train_1 failed */ + if (!dp_catalog_link_is_connected(ctrl->catalog)) { + break; + } + rc = dp_ctrl_link_rate_down_shift(ctrl); if (rc < 0) { /* already in RBR = 1.6G */ if (cr.lane_0_1 & DP_LANE0_1_CR_DONE) { @@ -1683,6 +1710,10 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl) } } else if (training_step == DP_TRAINING_2) { /* link train_2 failed, lower lane rate */ + if (!dp_catalog_link_is_connected(ctrl->catalog)) { + break; + } + rc = dp_ctrl_link_lane_down_shift(ctrl); if (rc < 0) { /* end with failure */ @@ -1703,6 +1734,11 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl) */ if (rc == 0) /* link train successfully */ dp_ctrl_push_idle(dp_ctrl); + else { + /* link training failed */ + dp_ctrl_deinitialize_mainlink(ctrl); + rc = -ECONNRESET; + } return rc; } diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 3eb0d428abf7..0c0573ad34e6 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -529,6 +529,11 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) if (ret) { /* link train failed */ hpd->hpd_high = 0; dp->hpd_state = ST_DISCONNECTED; + + if (ret == -ECONNRESET) { /* cable unplugged */ + dp->core_initialized = false; + } + } else { /* start sentinel checking in case of missing uevent */ dp_add_event(dp, EV_CONNECT_PENDING_TIMEOUT, 0, tout); @@ -794,6 +799,11 @@ static int dp_display_enable(struct dp_display_private *dp, u32 data) dp_display = g_dp_display; + if (dp_display->power_on) { + DRM_DEBUG_DP("Link already setup, return\n"); + return 0; + } + rc = dp_ctrl_on_stream(dp->ctrl); if (!rc) dp_display->power_on = true; @@ -826,6 +836,9 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data) dp_display = g_dp_display; + if (!dp_display->power_on) + return 0; + /* wait only if audio was enabled */ if (dp_display->audio_enabled) { if (!wait_for_completion_timeout(&dp->audio_comp, @@ -1198,7 +1211,7 @@ static int dp_pm_resume(struct device *dev) dp_catalog_ctrl_hpd_config(dp->catalog); - status = dp_catalog_hpd_get_state_status(dp->catalog); + status = dp_catalog_link_is_connected(dp->catalog); if (status) dp->dp_display.is_connected = true; diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index 1b7a20dc2d8e..97dca3e378b7 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -197,7 +197,7 @@ int dp_panel_read_sink_caps(struct dp_panel *dp_panel, if (!dp_panel->edid) { DRM_ERROR("panel edid read failed\n"); /* check edid read fail is due to unplug */ - if (!dp_catalog_hpd_get_state_status(panel->catalog)) { + if (!dp_catalog_link_is_connected(panel->catalog)) { rc = -ETIMEDOUT; goto end; } From patchwork Tue Nov 3 20:49:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 11879905 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=-12.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 53DF9C388F7 for ; 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Tue, 3 Nov 2020 20:49:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 066EDC384FA 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: dri-devel@lists.freedesktop.org, robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org Subject: [PATCH 2/3] drm/msm/dp: skip checking LINK_STATUS_UPDATED bit Date: Tue, 3 Nov 2020 12:49:01 -0800 Message-Id: <20201103204902.11899-3-khsieh@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201103204902.11899-1-khsieh@codeaurora.org> References: <20201103204902.11899-1-khsieh@codeaurora.org> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 04 Nov 2020 08:22:13 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: airlied@linux.ie, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, abhinavk@codeaurora.org, Kuogee Hsieh , tanmay@codeaurora.org, aravindh@codeaurora.org, freedreno@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Some dongle will not clear LINK_STATUS_UPDATED bit after DPCD read which cause link training failed. This patch just read 6 bytes of DPCD link status from sink and return without checking LINK_STATUS_UPDATED bit. Only 8 bits are used to represent link rate at sinker DPCD. The really link rate is 2.7Mb times the 8 bits value. For example, 0x0A at DPCD is equal to 2.7Gb (10 * 2.7Mb). This patch also convert 8 bits value of DPCD to really link rate to fix worng link rate error during phy compliance test. Fixes: fd4a29bed29b (drm/msm/dp: DisplayPort PHY compliance tests fixup) Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 20 ++++++-------------- drivers/gpu/drm/msm/dp/dp_link.c | 29 ++++++++++++++--------------- 2 files changed, 20 insertions(+), 29 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index c7af040ce252..b9ca844ce2ad 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -1061,23 +1061,15 @@ static bool dp_ctrl_train_pattern_set(struct dp_ctrl_private *ctrl, static int dp_ctrl_read_link_status(struct dp_ctrl_private *ctrl, u8 *link_status) { - int len = 0; - u32 const offset = DP_LANE_ALIGN_STATUS_UPDATED - DP_LANE0_1_STATUS; - u32 link_status_read_max_retries = 100; - - while (--link_status_read_max_retries) { - len = drm_dp_dpcd_read_link_status(ctrl->aux, - link_status); - if (len != DP_LINK_STATUS_SIZE) { - DRM_ERROR("DP link status read failed, err: %d\n", len); - return len; - } + int ret = 0, len; - if (!(link_status[offset] & DP_LINK_STATUS_UPDATED)) - return 0; + len = drm_dp_dpcd_read_link_status(ctrl->aux, link_status); + if (len != DP_LINK_STATUS_SIZE) { + DRM_ERROR("DP link status read failed, err: %d\n", len); + ret = -EINVAL; } - return -ETIMEDOUT; + return ret; } static int dp_ctrl_link_train_1(struct dp_ctrl_private *ctrl, diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c index 49d7fad36fc4..be986da78c4a 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.c +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -773,7 +773,8 @@ static int dp_link_process_link_training_request(struct dp_link_private *link) link->request.test_lane_count); link->dp_link.link_params.num_lanes = link->request.test_lane_count; - link->dp_link.link_params.rate = link->request.test_link_rate; + link->dp_link.link_params.rate = + drm_dp_bw_code_to_link_rate(link->request.test_link_rate); return 0; } @@ -943,22 +944,20 @@ static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) */ static int dp_link_process_link_status_update(struct dp_link_private *link) { - if (!(get_link_status(link->link_status, - DP_LANE_ALIGN_STATUS_UPDATED) & - DP_LINK_STATUS_UPDATED) || - (drm_dp_clock_recovery_ok(link->link_status, - link->dp_link.link_params.num_lanes) && - drm_dp_channel_eq_ok(link->link_status, - link->dp_link.link_params.num_lanes))) - return -EINVAL; + bool channel_eq_done = drm_dp_channel_eq_ok(link->link_status, + link->dp_link.link_params.num_lanes); - DRM_DEBUG_DP("channel_eq_done = %d, clock_recovery_done = %d\n", - drm_dp_clock_recovery_ok(link->link_status, - link->dp_link.link_params.num_lanes), - drm_dp_clock_recovery_ok(link->link_status, - link->dp_link.link_params.num_lanes)); + bool clock_recovery_done = drm_dp_clock_recovery_ok(link->link_status, + link->dp_link.link_params.num_lanes); - return 0; + DRM_DEBUG_DP("channel_eq_done = %d, clock_recovery_done = %d\n", + channel_eq_done, clock_recovery_done); + + if (channel_eq_done && clock_recovery_done) + return -EINVAL; + + + return 0; } /** From patchwork Tue Nov 3 20:49:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kuogee Hsieh X-Patchwork-Id: 11879861 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=-12.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 6C211C2D0A3 for ; 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Tue, 3 Nov 2020 20:49:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 53AB2C38522 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: dri-devel@lists.freedesktop.org, robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org Subject: [PATCH 3/3] drm/msm/dp: promote irq_hpd handle to handle link training correctly Date: Tue, 3 Nov 2020 12:49:02 -0800 Message-Id: <20201103204902.11899-4-khsieh@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201103204902.11899-1-khsieh@codeaurora.org> References: <20201103204902.11899-1-khsieh@codeaurora.org> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 04 Nov 2020 08:22:13 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: airlied@linux.ie, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, abhinavk@codeaurora.org, Kuogee Hsieh , tanmay@codeaurora.org, aravindh@codeaurora.org, freedreno@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Some dongles require link training done at irq_hpd request instead of plugin request. This patch promote irq_hpd handler to handle link training and setup hpd_state correctly. Fixes: fdaf9a5e3c15 (drm/msm/dp: fixes wrong connection state caused by failure of link training) Signed-off-by: Kuogee Hsieh --- drivers/gpu/drm/msm/dp/dp_display.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 0c0573ad34e6..27e7e27b8b90 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -449,10 +449,9 @@ static int dp_display_handle_irq_hpd(struct dp_display_private *dp) sink_request = dp->link->sink_request; if (sink_request & DS_PORT_STATUS_CHANGED) { - dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); if (dp_display_is_sink_count_zero(dp)) { DRM_DEBUG_DP("sink count is zero, nothing to do\n"); - return 0; + return -ENOTCONN; } return dp_display_process_hpd_high(dp); @@ -469,7 +468,9 @@ static int dp_display_handle_irq_hpd(struct dp_display_private *dp) static int dp_display_usbpd_attention_cb(struct device *dev) { int rc = 0; + u32 sink_request; struct dp_display_private *dp; + struct dp_usbpd *hpd; if (!dev) { DRM_ERROR("invalid dev\n"); @@ -483,10 +484,26 @@ static int dp_display_usbpd_attention_cb(struct device *dev) return -ENODEV; } + hpd = dp->usbpd; + /* check for any test request issued by sink */ rc = dp_link_process_request(dp->link); - if (!rc) - dp_display_handle_irq_hpd(dp); + if (!rc) { + sink_request = dp->link->sink_request; + if (sink_request & DS_PORT_STATUS_CHANGED) { + /* same as unplugged */ + hpd->hpd_high = 0; + dp->hpd_state = ST_DISCONNECT_PENDING; + dp_add_event(dp, EV_USER_NOTIFICATION, false, 0); + } + + rc = dp_display_handle_irq_hpd(dp); + + if (!rc && (sink_request & DS_PORT_STATUS_CHANGED)) { + hpd->hpd_high = 1; + dp->hpd_state = ST_CONNECT_PENDING; + } + } return rc; }