From patchwork Fri Nov 27 09:23:15 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 11935413 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 956C8C2D0E4 for ; Fri, 27 Nov 2020 10:12:08 +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 2578220674 for ; Fri, 27 Nov 2020 10:12:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="xXo1mpme" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2578220674 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.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 CC4446EB9D; Fri, 27 Nov 2020 10:11:40 +0000 (UTC) Received: from mail-lj1-x241.google.com (mail-lj1-x241.google.com [IPv6:2a00:1450:4864:20::241]) by gabe.freedesktop.org (Postfix) with ESMTPS id AF3806EB71 for ; Fri, 27 Nov 2020 09:23:20 +0000 (UTC) Received: by mail-lj1-x241.google.com with SMTP id j10so5193887lja.5 for ; Fri, 27 Nov 2020 01:23:20 -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:mime-version :content-transfer-encoding; bh=dDVGerivDhcovGvlrg4RdGN4PhZ+oBrQSqPNlOoN/KE=; b=xXo1mpme3FQkxz7YOniDXUXLh1hheRztkvuFD0BgV002eFkuLs9/dcgDiWWCkpLt1h e1g5XSCd/9I2I221sERnEP5Fl3x2MhneduRxljWEjh4cMBhD/La7eSfE+qUnugOnZmvQ CTYXTVxuM/C5YrnndrLDTMSY/njX9IEXElhdv3mUHj9yJCDG845sHyPDxgeFGjR2Kt6B fYw7wfn1t5zKg1WL1I18oLC5Aq1lLeCDWszonc6zgKx8SDoPTC+FPtYEisuLI5e4jASN 3pFbXg6iE0k75/7eStyKP54QMo2n+JxTlPeaRbJPAhsys/nCn/ARQB+lI/K9/Yx9xU8m 29GQ== 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:mime-version :content-transfer-encoding; bh=dDVGerivDhcovGvlrg4RdGN4PhZ+oBrQSqPNlOoN/KE=; b=Ts+RRWmRwxXDEDJiYKwXSjSBwAgjgOfml2FS5SX2UHbRbjofMKgWYxrPJ6zl+c4mkz ZezovoAgMNudAAo8fnKVZNdUx/ikSKDi3wyOGs2+FxT8ZTXt99x2ypda0PkOaKhTWp70 x5NMLrb+5+atTbsz7mDA2AmSCz1OKG1bcZWPA6tqn28FD9R9zfV1chu5MKZTGFPWVw8d 5ChUgjfR2ScsBE/QTg+jJomaGGr9xcU6f8Vba5Zahum4e11xG3yGHmTnj6ghUVVrEDka E8mGNCBcfDJR5tEmwBUDsusM5WtfUrrezTsV1mk5jptHZhDP+chM9gtCPssg7RgUu6/9 SdBQ== X-Gm-Message-State: AOAM533LrwvvxAPArnxk40LNsMulpXxUJWDzgbNnJdcUUFgi0OnCv/00 joaaILeaDlWGlvlH3mxNyqkBcO22oGyXfA== X-Google-Smtp-Source: ABdhPJw2T3Uh8Fn3UGKCfLRGJRb/SWo+VxiKeMYglY+tch0H/sdr9lyw+X2xetxPm3T4VEjuJwptvA== X-Received: by 2002:a2e:998e:: with SMTP id w14mr3176710lji.100.1606468998738; Fri, 27 Nov 2020 01:23:18 -0800 (PST) Received: from eriador.lumag.spb.ru ([188.162.64.79]) by smtp.gmail.com with ESMTPSA id a6sm615442lfi.107.2020.11.27.01.23.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Nov 2020 01:23:17 -0800 (PST) From: Dmitry Baryshkov To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 1/2] drm/bridge/lontium-lt9611uxc: fix waiting for EDID to become available Date: Fri, 27 Nov 2020 12:23:15 +0300 Message-Id: <20201127092316.122246-1-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 X-Mailman-Approved-At: Fri, 27 Nov 2020 10:11:27 +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: Jernej Skrabec , Jonas Karlman , David Airlie , Neil Armstrong , Andrzej Hajda , Vinod Koul , Laurent Pinchart , Manivannan Sadhasivam , Sam Ravnborg Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" - 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. - Return NULL pointer from get_edid() callback rather than ERR_PTR() pointer, as DRM code does NULL checks rather than IS_ERR(). Signed-off-by: Dmitry Baryshkov --- drivers/gpu/drm/bridge/lontium-lt9611uxc.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/lontium-lt9611uxc.c b/drivers/gpu/drm/bridge/lontium-lt9611uxc.c index 0c98d27f84ac..b708700e182d 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) @@ -503,7 +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);