From patchwork Fri Jan 15 11:02:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 12022247 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 55509C433E0 for ; Fri, 15 Jan 2021 11:03:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1227723877 for ; Fri, 15 Jan 2021 11:03:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726455AbhAOLDN (ORCPT ); Fri, 15 Jan 2021 06:03:13 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47834 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726045AbhAOLDN (ORCPT ); Fri, 15 Jan 2021 06:03:13 -0500 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7C16DC061757 for ; Fri, 15 Jan 2021 03:02:32 -0800 (PST) Received: by mail-lf1-x135.google.com with SMTP id x20so12501106lfe.12 for ; Fri, 15 Jan 2021 03:02:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=gHRQ0xxynPvZxQkJ0XwkKO8LykVQgvPwVrEG9Eu8CIA=; b=Q6OSfsKHIRau6OEp7U8C5Y+6jgIDFkbJL5vZk91Nuv0NpTmw5qQ5axByZ0pzivn+Si owKkBlxjCDFJSDxUZFD1Ehqk9+kxyKCa260yDW+BtNDdqS4QyCv0hAypajTGyz+UGXgH INO1yAMhbBbZ6ju1YmkaWYKJjix5mvZP6dTrZa/lro9WUF6ykREP9qqiOFZVPv9vOPT1 N999vz7F0m/nUByMdKPhktsyjnCkqSnJr1hKKMJvSJCEgJgNXS7gJQMTlEPqOt3krd4y 0aP7+OAYAsWeLdhAFW6Yoi+DM4Q7vZA/lb5hM2kkxB9+eEold3C44pOIVRXBc5tvoxng v7ww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=gHRQ0xxynPvZxQkJ0XwkKO8LykVQgvPwVrEG9Eu8CIA=; b=sN2wX/BlHsjm/4qgolsuTV2EKyg3VGliDlZrssMiA0980C6nSNozBGdvjx5ecAXUVC Wr1js9crF7vCIle96vaVFqk0agByAc3EfJUfgGl6B0vkT6O8R4luuw37CUcywvIklKE7 sgk3RiHeainLDidPLQY6f+6tEIcxfeJZGrDvdKkKa+e1fm9dRSgfEKfUV05lnbl/VLt3 XEhHV24n17ylaR3KS7idQuntd017m0FqGLhmi2+9r0tz4KoDpFxqC1D/chbDhor2nJHL 9nHBQ+sXzcHSNw/bEon/Ee4EKOgeeDeaJom5hsYEqxlCBLTNPYowa/Kpj9H4RNP4sRW2 eE+w== X-Gm-Message-State: AOAM532c7NiB7JScitpmRlGd/ezPYCXIcZq6gdAHd11UqQfcfeGDqImw odC4ZjD2xlQZEhlZ8jOtTrVELQ== X-Google-Smtp-Source: ABdhPJxBug6UNOjEOx3RFIV60hE0chZMQa2BhXfTSNpiRFtgstHaPxI4KJqF8zn5ZRIsxUO9Suy7Aw== X-Received: by 2002:a19:c711:: with SMTP id x17mr5344738lff.56.1610708551013; Fri, 15 Jan 2021 03:02:31 -0800 (PST) Received: from eriador.lumag.spb.ru ([188.162.64.106]) by smtp.gmail.com with ESMTPSA id s8sm862020lfi.21.2021.01.15.03.02.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jan 2021 03:02:30 -0800 (PST) From: Dmitry Baryshkov To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Cc: Daniel Vetter , David Airlie , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Vinod Koul , Sam Ravnborg , Manivannan Sadhasivam Subject: [PATCH v2 1/3] drm/bridge/lontium-lt9611uxc: fix waiting for EDID to become available Date: Fri, 15 Jan 2021 14:02:23 +0300 Message-Id: <20210115110225.127075-2-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210115110225.127075-1-dmitry.baryshkov@linaro.org> References: <20210115110225.127075-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org - Call wake_up() when EDID ready event is received to wake wait_event_interruptible_timeout() - Increase waiting timeout, reading EDID can take longer than 100ms, so let's be on a safe side. Signed-off-by: Dmitry Baryshkov Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge") Reviewed-by: Bjorn Andersson --- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c index 0c98d27f84ac..a59e811f1705 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c @@ -145,8 +145,10 @@ static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id) lt9611uxc_unlock(lt9611uxc); - if (irq_status & BIT(0)) + if (irq_status & BIT(0)) { lt9611uxc->edid_read = !!(hpd_status & BIT(0)); + wake_up_all(<9611uxc->wq); + } if (irq_status & BIT(1)) { if (lt9611uxc->connector.dev) @@ -465,7 +467,7 @@ static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *brid static int lt9611uxc_wait_for_edid(struct lt9611uxc *lt9611uxc) { return wait_event_interruptible_timeout(lt9611uxc->wq, lt9611uxc->edid_read, - msecs_to_jiffies(100)); + msecs_to_jiffies(500)); } static int lt9611uxc_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) From patchwork Fri Jan 15 11:02:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 12022251 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 6A361C433E9 for ; Fri, 15 Jan 2021 11:03:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2A09D235F9 for ; 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Fri, 15 Jan 2021 03:02:32 -0800 (PST) From: Dmitry Baryshkov To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Cc: Daniel Vetter , David Airlie , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Vinod Koul , Sam Ravnborg , Manivannan Sadhasivam Subject: [PATCH v2 2/3] drm/bridge/lontium-lt9611uxc: fix get_edid return code Date: Fri, 15 Jan 2021 14:02:24 +0300 Message-Id: <20210115110225.127075-3-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210115110225.127075-1-dmitry.baryshkov@linaro.org> References: <20210115110225.127075-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Return NULL pointer from get_edid() callback rather than ERR_PTR() pointer, as DRM code does NULL checks rather than IS_ERR(). Also while we are at it, return NULL if getting EDID timed out. Signed-off-by: Dmitry Baryshkov Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge") Reviewed-by: Bjorn Andersson --- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c index a59e811f1705..b708700e182d 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c @@ -505,7 +505,10 @@ static struct edid *lt9611uxc_bridge_get_edid(struct drm_bridge *bridge, ret = lt9611uxc_wait_for_edid(lt9611uxc); if (ret < 0) { dev_err(lt9611uxc->dev, "wait for EDID failed: %d\n", ret); - return ERR_PTR(ret); + return NULL; + } else if (ret == 0) { + dev_err(lt9611uxc->dev, "wait for EDID timeout\n"); + return NULL; } return drm_do_get_edid(connector, lt9611uxc_get_edid_block, lt9611uxc); From patchwork Fri Jan 15 11:02:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 12022253 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 85F1EC433E6 for ; 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Fri, 15 Jan 2021 03:02:34 -0800 (PST) Received: from eriador.lumag.spb.ru ([188.162.64.106]) by smtp.gmail.com with ESMTPSA id s8sm862020lfi.21.2021.01.15.03.02.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 15 Jan 2021 03:02:33 -0800 (PST) From: Dmitry Baryshkov To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Cc: Daniel Vetter , David Airlie , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Vinod Koul , Sam Ravnborg , Manivannan Sadhasivam , Bjorn Andersson Subject: [PATCH v2 3/3] drm/bridge/lontium-lt9611uxc: move HPD notification out of IRQ handler Date: Fri, 15 Jan 2021 14:02:25 +0300 Message-Id: <20210115110225.127075-4-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210115110225.127075-1-dmitry.baryshkov@linaro.org> References: <20210115110225.127075-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org drm hotplug handling code (drm_client_dev_hotplug()) can wait on mutex, thus delaying further lt9611uxc IRQ events processing. It was observed occasionally during bootups, when drm_client_modeset_probe() was waiting for EDID ready event, which was delayed because IRQ handler was stuck trying to deliver hotplug event. Move hotplug notifications from IRQ handler to separate work to be able to process IRQ events without delays. Signed-off-by: Dmitry Baryshkov Fixes: 0cbbd5b1a012 ("drm: bridge: add support for lontium LT9611UXC bridge") Reviewed-by: Bjorn Andersson Reported-by: kernel test robot Reported-by: kernel test robot --- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 30 +++++++++++++++++----- 1 file changed, 24 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c index b708700e182d..88630bc2921f 100644 --- a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c +++ b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c @@ -14,6 +14,7 @@ #include #include #include +#include #include @@ -36,6 +37,7 @@ struct lt9611uxc { struct mutex ocm_lock; struct wait_queue_head wq; + struct work_struct work; struct device_node *dsi0_node; struct device_node *dsi1_node; @@ -52,6 +54,7 @@ struct lt9611uxc { bool hpd_supported; bool edid_read; + bool hdmi_connected; uint8_t fw_version; }; @@ -151,15 +154,26 @@ static irqreturn_t lt9611uxc_irq_thread_handler(int irq, void *dev_id) } if (irq_status & BIT(1)) { - if (lt9611uxc->connector.dev) - drm_kms_helper_hotplug_event(lt9611uxc->connector.dev); - else - drm_bridge_hpd_notify(<9611uxc->bridge, !!(hpd_status & BIT(1))); + lt9611uxc->hdmi_connected = !!(hpd_status & BIT(1)); + schedule_work(<9611uxc->work); } return IRQ_HANDLED; } +void lt9611uxc_hpd_work(struct work_struct *work) +{ + struct lt9611uxc *lt9611uxc = container_of(work, struct lt9611uxc, work); + + if (lt9611uxc->connector.dev) + drm_kms_helper_hotplug_event(lt9611uxc->connector.dev); + else + drm_bridge_hpd_notify(<9611uxc->bridge, + lt9611uxc->hdmi_connected ? + connector_status_connected : + connector_status_disconnected); +} + static void lt9611uxc_reset(struct lt9611uxc *lt9611uxc) { gpiod_set_value_cansleep(lt9611uxc->reset_gpio, 1); @@ -447,7 +461,7 @@ static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *brid struct lt9611uxc *lt9611uxc = bridge_to_lt9611uxc(bridge); unsigned int reg_val = 0; int ret; - int connected = 1; + bool connected = true; if (lt9611uxc->hpd_supported) { lt9611uxc_lock(lt9611uxc); @@ -457,8 +471,9 @@ static enum drm_connector_status lt9611uxc_bridge_detect(struct drm_bridge *brid if (ret) dev_err(lt9611uxc->dev, "failed to read hpd status: %d\n", ret); else - connected = reg_val & BIT(1); + connected = !!(reg_val & BIT(1)); } + lt9611uxc->hdmi_connected = connected; return connected ? connector_status_connected : connector_status_disconnected; @@ -931,6 +946,8 @@ static int lt9611uxc_probe(struct i2c_client *client, lt9611uxc->fw_version = ret; init_waitqueue_head(<9611uxc->wq); + INIT_WORK(<9611uxc->work, lt9611uxc_hpd_work); + ret = devm_request_threaded_irq(dev, client->irq, NULL, lt9611uxc_irq_thread_handler, IRQF_ONESHOT, "lt9611uxc", lt9611uxc); @@ -967,6 +984,7 @@ static int lt9611uxc_remove(struct i2c_client *client) struct lt9611uxc *lt9611uxc = i2c_get_clientdata(client); disable_irq(client->irq); + flush_scheduled_work(); lt9611uxc_audio_exit(lt9611uxc); drm_bridge_remove(<9611uxc->bridge);