From patchwork Tue Dec 5 08:09:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 13479553 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1CE93C4167B for ; Tue, 5 Dec 2023 08:10:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=H9hx5XSG0PedvB5G9Iuc8ScwGjsZkjAT/GZ+s3k8o78=; b=tHPF/CsV2RORlX ilIX+eDWNMRoF0zAlUksazPj+v0zDWrjFXY+otS+zvCg4tbWdBhBkc7u79iEJ6sN9yo7n1s9plvi7 hy5uXekf+HEZeHtVsI+LmH8S8X/AGQDkbLjhciklwyHS9MNrj/+nbf1cd6iqHk5S28C7UhCYE5vCJ KfDo6osu7bew3Su1nt15I2xIzrZTjkwBoKOsbV+sK2H+R+52hXpFiU1bodIrVlsWhkOXzInBOYssT C1c3UkWvJI0FnYmhrhcsjMSJb/B7MocrlDK/GIfxJyPBKHGHEVclOHBEupA6NM5QAr/QrFEjs4LCf Nygm3Wp9BGg6LHqcWSvw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rAQVb-006bCQ-00; Tue, 05 Dec 2023 08:10:23 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rAQVP-006b3U-0k; Tue, 05 Dec 2023 08:10:14 +0000 Received: from [127.0.1.1] (91-158-149-209.elisa-laajakaista.fi [91.158.149.209]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 243E31010; Tue, 5 Dec 2023 09:09:25 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1701763765; bh=mZtjLUcwPurRjWrqxlSCj4xDyOLWjQrMwEJHqEedGrc=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=T2B8z+EFK7yLMReLZkqX9uLlblAixwWFtW4w9OrUtqDvnIfnZV28/DB3CAz3fRJPM sDpUXFmHqK4sK6+zKXch5KJE1mZSLXmMaEI1NcnsP9PePDIOqzP2ZpkaRIa6XILfGv 5QqCugz8PlXWX2F8ueVztEMk5bYQKK38SVtYbquQ= From: Tomi Valkeinen Date: Tue, 05 Dec 2023 10:09:34 +0200 Subject: [PATCH 3/4] media: rkisp1: Fix IRQ handling due to shared interrupts MIME-Version: 1.0 Message-Id: <20231205-rkisp-irq-fix-v1-3-f4045c74ba45@ideasonboard.com> References: <20231205-rkisp-irq-fix-v1-0-f4045c74ba45@ideasonboard.com> In-Reply-To: <20231205-rkisp-irq-fix-v1-0-f4045c74ba45@ideasonboard.com> To: Dafna Hirschfeld , Laurent Pinchart , Mauro Carvalho Chehab , Heiko Stuebner , Paul Elder Cc: Alexander Stein , kieran.bingham@ideasonboard.com, umang.jain@ideasonboard.com, aford173@gmail.com, linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Tomi Valkeinen X-Mailer: b4 0.12.4 X-Developer-Signature: v=1; a=openpgp-sha256; l=4620; i=tomi.valkeinen@ideasonboard.com; h=from:subject:message-id; bh=mZtjLUcwPurRjWrqxlSCj4xDyOLWjQrMwEJHqEedGrc=; b=owEBbQKS/ZANAwAIAfo9qoy8lh71AcsmYgBlbtrY0ag5xyx3Lvv6lltmY2X9cTNDItBEJueE1 /dtr4OCXaCJAjMEAAEIAB0WIQTEOAw+ll79gQef86f6PaqMvJYe9QUCZW7a2AAKCRD6PaqMvJYe 9QsvD/wKjXWKvhIraBeIDihoS0XIIVMphsqF9AQl4NGzoX0MehHO9SgTNjNmA95+ILO2R6MMuHx vXG7j3tLwF1O0WOjQzRXl2p9DHvtsySnQFHlSp8SEx0DXoVWwRbRGQ92tF6kYnQOUXeznJQOnG4 idNHblxE3f7pfvwLmkpWTDfHVfKRJN76QNAt+pVEFCSTB+DtB2TBWXGrBazlPRBW0hbx414AmYA wI41GEvlDfpoACZxYjaKpb+/4UruMRASpZOd3Ksg4E92AFDNB+4RcecVwb4DTeFHX1m4JinRnlG t9S3D+AJS0qZg9ECDt3S3Fv4DAL4vuHModMlHZ/hPp4GGC9kVtqTMZUY4NMslb4uTpt/q0Tif1y Bth3uhcsXEb6XQ+P+mqBI8l88Z/RZffcH1i7DhH81oEtU0qORJpnEj8To8x4Va44Uj4Ai0vC3Z2 OpMebdT+709zFSwVkUokuQUkSZ1I0ZRZ6NaycdrjCpR6/cuXE2bjcHdXq5UuuyOnUJpiDnAG3R2 +AXqoxw0Zv9+rbSUEPOPtvJIbteqela88/Dao13K6GeJMLJTO5J6yNZC4+UrqN6zB1/w49H3dTB IUdwVTItp2jXk9prOm5FI7nFB/ujHNuruPx8svnd/huQPuuJAM6AnxSYSah7DaZsTdn/+UuXWnV 558PKJn7Z9WAgVg== X-Developer-Key: i=tomi.valkeinen@ideasonboard.com; a=openpgp; fpr=C4380C3E965EFD81079FF3A7FA3DAA8CBC961EF5 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231205_001011_447835_10D3D038 X-CRM114-Status: GOOD ( 19.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The driver requests the interrupts as IRQF_SHARED, so the interrupt handlers can be called at any time. If such a call happens while the ISP is powered down, the SoC will hang as the driver tries to access the ISP registers. Fix this by adding a new field, 'irqs_enabled', which is used to bail out from the interrupt handler when the ISP is not operational. Signed-off-by: Tomi Valkeinen --- .../media/platform/rockchip/rkisp1/rkisp1-capture.c | 3 +++ .../media/platform/rockchip/rkisp1/rkisp1-common.h | 2 ++ drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c | 3 +++ drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c | 21 +++++++++++++++++++++ drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c | 3 +++ 5 files changed, 32 insertions(+) diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c index b50b044d22af..e92067897f28 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c @@ -779,6 +779,9 @@ irqreturn_t rkisp1_capture_isr(int irq, void *ctx) unsigned int i; u32 status; + if (!rkisp1->irqs_enabled) + return IRQ_NONE; + status = rkisp1_read(rkisp1, RKISP1_CIF_MI_MIS); if (!status) return IRQ_NONE; diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h index ec28907d978e..7f97fdf6e24c 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-common.h @@ -465,6 +465,7 @@ struct rkisp1_debug { * @debug: debug params to be exposed on debugfs * @info: version-specific ISP information * @irqs: IRQ line numbers + * @irqs_enabled: the hardware is enabled and can cause interrupts */ struct rkisp1_device { void __iomem *base_addr; @@ -488,6 +489,7 @@ struct rkisp1_device { struct rkisp1_debug debug; const struct rkisp1_info *info; int irqs[RKISP1_NUM_IRQS]; + bool irqs_enabled; }; /* diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c index 47f4353a1784..f6b54654b435 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-csi.c @@ -184,6 +184,9 @@ irqreturn_t rkisp1_csi_isr(int irq, void *ctx) struct rkisp1_device *rkisp1 = dev_get_drvdata(dev); u32 val, status; + if (!rkisp1->irqs_enabled) + return IRQ_NONE; + status = rkisp1_read(rkisp1, RKISP1_CIF_MIPI_MIS); if (!status) return IRQ_NONE; diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c index 1d60f4b8bd09..fbe03f7864e3 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-dev.c @@ -306,6 +306,23 @@ static int __maybe_unused rkisp1_runtime_suspend(struct device *dev) { struct rkisp1_device *rkisp1 = dev_get_drvdata(dev); + rkisp1->irqs_enabled = false; + /* Make sure the IRQ handler will see the above */ + mb(); + + /* + * Wait until any running IRQ handler has returned. The IRQ handler + * may get called even after this (as it's a shared interrupt line) + * but the 'irqs_enabled' flag will make the handler return immediately. + */ + for (unsigned int i = 0; i < RKISP1_NUM_IRQS; ++i) { + if (rkisp1->irqs[i] == -1) + continue; + + if (i == 0 || rkisp1->irqs[i - 1] != rkisp1->irqs[i]) + synchronize_irq(rkisp1->irqs[i]); + } + clk_bulk_disable_unprepare(rkisp1->clk_size, rkisp1->clks); return pinctrl_pm_select_sleep_state(dev); } @@ -322,6 +339,10 @@ static int __maybe_unused rkisp1_runtime_resume(struct device *dev) if (ret) return ret; + rkisp1->irqs_enabled = true; + /* Make sure the IRQ handler will see the above */ + mb(); + return 0; } diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c index dafbfd230542..d6b8786661ad 100644 --- a/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c +++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-isp.c @@ -1082,6 +1082,9 @@ irqreturn_t rkisp1_isp_isr(int irq, void *ctx) struct rkisp1_device *rkisp1 = dev_get_drvdata(dev); u32 status, isp_err; + if (!rkisp1->irqs_enabled) + return IRQ_NONE; + status = rkisp1_read(rkisp1, RKISP1_CIF_ISP_MIS); if (!status) return IRQ_NONE;