From patchwork Mon Apr 5 02:09:29 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "tiantao (H)" X-Patchwork-Id: 12182597 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, 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 D7F97C433ED for ; Mon, 5 Apr 2021 02:09:12 +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 5353B60BD3 for ; Mon, 5 Apr 2021 02:09:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5353B60BD3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=hisilicon.com 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 9AB4D6E0F0; Mon, 5 Apr 2021 02:09:11 +0000 (UTC) Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) by gabe.freedesktop.org (Postfix) with ESMTPS id 051DB6E0F0 for ; Mon, 5 Apr 2021 02:09:09 +0000 (UTC) Received: from DGGEMS406-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4FDDYV6zFzz1BFLn; Mon, 5 Apr 2021 10:06:54 +0800 (CST) Received: from localhost.localdomain (10.69.192.56) by DGGEMS406-HUB.china.huawei.com (10.3.19.206) with Microsoft SMTP Server id 14.3.498.0; Mon, 5 Apr 2021 10:09:02 +0800 From: Tian Tao To: , , , Subject: [PATCH] drm/msm: move to use request_irq by IRQF_NO_AUTOEN flag Date: Mon, 5 Apr 2021 10:09:29 +0800 Message-ID: <1617588569-5753-1-git-send-email-tiantao6@hisilicon.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-CFilter-Loop: Reflected 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: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" disable_irq() after request_irq() still has a time gap in which interrupts can come. request_irq() with IRQF_NO_AUTOEN flag will disable IRQ auto-enable because of requesting. this patch is based on "cbe16f35bee68 genirq: Add IRQF_NO_AUTOEN for request_irq/nmi()" which was being merged. Signed-off-by: Tian Tao --- drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 5 ++--- drivers/gpu/drm/msm/dp/dp_display.c | 4 ++-- 2 files changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c index 71c917f..126c23d 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c @@ -1405,15 +1405,14 @@ static int a6xx_gmu_get_irq(struct a6xx_gmu *gmu, struct platform_device *pdev, irq = platform_get_irq_byname(pdev, name); - ret = request_irq(irq, handler, IRQF_TRIGGER_HIGH, name, gmu); + ret = request_irq(irq, handler, IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN, + name, gmu); if (ret) { DRM_DEV_ERROR(&pdev->dev, "Unable to get interrupt %s %d\n", name, ret); return ret; } - disable_irq(irq); - return irq; } diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 5a39da6..75ef10e 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -1183,13 +1183,13 @@ int dp_display_request_irq(struct msm_dp *dp_display) rc = devm_request_irq(&dp->pdev->dev, dp->irq, dp_display_irq_handler, - IRQF_TRIGGER_HIGH, "dp_display_isr", dp); + IRQF_TRIGGER_HIGH | IRQF_NO_AUTOEN, + "dp_display_isr", dp); if (rc < 0) { DRM_ERROR("failed to request IRQ%u: %d\n", dp->irq, rc); return rc; } - disable_irq(dp->irq); return 0; }