From mboxrd@z Thu Jan 1 00:00:00 1970 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DF62C4167B for ; Thu, 14 Apr 2022 14:56:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354024AbiDNOzE (ORCPT ); Thu, 14 Apr 2022 10:55:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37596 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242879AbiDNNuc (ORCPT ); Thu, 14 Apr 2022 09:50:32 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9648A76CF; Thu, 14 Apr 2022 06:44:16 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 785F6B82986; Thu, 14 Apr 2022 13:44:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C1F66C385A1; Thu, 14 Apr 2022 13:44:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649943854; bh=M1gU7GJAdKfEoxBo0mmxgvDmkAOM71wt/lDiYoCEucE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FH8E8wGFtWeRkY1D0hF+k9kB42n9fRwkrcmAqL/+yL9nCMhcZREyte6Z489pXN5F+ oQgo1ZwQDpUjruAck6MsDmstLNYoqCL47aS8lNPzZTKOgCSRm9EjyjLlQ3oxXahFHT QhE0WCf415lYdSoDwwsO+o03X/7U2MYxYcdB3kiQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= , Sasha Levin Subject: [PATCH 5.4 303/475] media: cx88-mpeg: clear interrupt status register before streaming video Date: Thu, 14 Apr 2022 15:11:28 +0200 Message-Id: <20220414110903.572333287@linuxfoundation.org> X-Mailer: git-send-email 2.35.2 In-Reply-To: <20220414110855.141582785@linuxfoundation.org> References: <20220414110855.141582785@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Daniel González Cabanelas [ Upstream commit 56cb61f70e547e1b0cdfe6ff5a1f1ce6242e6d96 ] Some cx88 video cards may have transport stream status interrupts set to 1 from cold start, causing errors like this: cx88xx: cx88_print_irqbits: core:irq mpeg [0x100000] ts_err?* cx8802: cx8802_mpeg_irq: mpeg:general errors: 0x00100000 According to CX2388x datasheet, the interrupt status register should be cleared before enabling IRQs to stream video. Fix it by clearing the Transport Stream Interrupt Status register. Signed-off-by: Daniel González Cabanelas Signed-off-by: Sasha Levin --- drivers/media/pci/cx88/cx88-mpeg.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/pci/cx88/cx88-mpeg.c b/drivers/media/pci/cx88/cx88-mpeg.c index a57c991b165b..10d2971ef062 100644 --- a/drivers/media/pci/cx88/cx88-mpeg.c +++ b/drivers/media/pci/cx88/cx88-mpeg.c @@ -162,6 +162,9 @@ int cx8802_start_dma(struct cx8802_dev *dev, cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET); q->count = 0; + /* clear interrupt status register */ + cx_write(MO_TS_INTSTAT, 0x1f1111); + /* enable irqs */ dprintk(1, "setting the interrupt mask\n"); cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT); -- 2.34.1