From patchwork Tue Dec 15 02:45:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zev Weiss X-Patchwork-Id: 344711 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=-18.7 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=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 635E3C2BB9A for ; Tue, 15 Dec 2020 02:59:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3475C223E0 for ; Tue, 15 Dec 2020 02:59:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726004AbgLOC5B (ORCPT ); Mon, 14 Dec 2020 21:57:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48632 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725927AbgLOC4v (ORCPT ); Mon, 14 Dec 2020 21:56:51 -0500 Received: from thorn.bewilderbeest.net (thorn.bewilderbeest.net [IPv6:2605:2700:0:5::4713:9cab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F08F6C0617A6; Mon, 14 Dec 2020 18:56:06 -0800 (PST) Received: from hatter.bewilderbeest.net (unknown [IPv6:2600:6c44:7f:ba20:1c66:ab2d:5a3:5a9e]) (using TLSv1.2 with cipher DHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: zev) by thorn.bewilderbeest.net (Postfix) with ESMTPSA id 6D3E5806F8; Mon, 14 Dec 2020 18:46:00 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 thorn.bewilderbeest.net 6D3E5806F8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bewilderbeest.net; s=thorn; t=1608000361; bh=xR8CLmhYhW7l9AVRInyVC7PTJeDKCJBNFlHVTPgUQAg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PgdqqfbXNy4kDvfuNujcew/oE4ykMgotbUQZD640u/xW+xSgkjvUrhwSy2IFYIAw5 n26ZJP8lr5i/iRccf0ndGIWxFaV62XCB2xKQ0La7ICWRgPBR+Z6MLlLSW8xuzXdBBR eB3gNUYRsk91y4I4wyVfGtIY7sjP7rVJIxJC2JIQ= From: Zev Weiss To: Eddie James , Mauro Carvalho Chehab , Joel Stanley , Andrew Jeffery , linux-media@vger.kernel.org, openbmc@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org Cc: Zev Weiss , Jae Hyun Yoo Subject: [PATCH 1/3] aspeed-video: add error message for unhandled interrupts Date: Mon, 14 Dec 2020 20:45:40 -0600 Message-Id: <20201215024542.18888-2-zev@bewilderbeest.net> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201215024542.18888-1-zev@bewilderbeest.net> References: <20201215024542.18888-1-zev@bewilderbeest.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This device seems to have a propensity for asserting interrupts that aren't enabled -- in addition to the CAPTURE_COMPLETE and FRAME_COMPLETE interrupts squashed in commit 65d270acb2d662c3346793663ac3a759eb4491b8, COMP_READY has also been observed. Adding a message diagnosing what happened in the event of unhandled interrupt status bits should hopefully make the debugging process simpler for any others that pop up in the future. Signed-off-by: Zev Weiss --- drivers/media/platform/aspeed-video.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c index 7d98db1d9b52..eb02043532e3 100644 --- a/drivers/media/platform/aspeed-video.c +++ b/drivers/media/platform/aspeed-video.c @@ -562,6 +562,7 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg) { struct aspeed_video *video = arg; u32 sts = aspeed_video_read(video, VE_INTERRUPT_STATUS); + u32 orig_sts = sts; /* * Resolution changed or signal was lost; reset the engine and @@ -639,6 +640,10 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg) if (sts & VE_INTERRUPT_FRAME_COMPLETE) sts &= ~VE_INTERRUPT_FRAME_COMPLETE; + if (sts) + dev_err_ratelimited(video->dev, "unexpected interrupt asserted:" + " sts=%08x, orig_sts=%08x", sts, orig_sts); + return sts ? IRQ_NONE : IRQ_HANDLED; }