From patchwork Thu Sep 8 09:51:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 12969865 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id D5E5CECAAD5 for ; Thu, 8 Sep 2022 09:52:04 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 059F710E9FE; Thu, 8 Sep 2022 09:51:34 +0000 (UTC) Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5483710E9FE for ; Thu, 8 Sep 2022 09:51:21 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id DA62933A5D; Thu, 8 Sep 2022 09:51:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1662630679; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rLonqVoT3RhXGKfCH51i6qJuANJGJL+Z/J3Zqw4wpys=; b=mUn09OPHBp86y84rs3QFsOEQ1tjlxNIE43fnr7Wwznhe4BnZX62b+3iTYb7BWReE103LdC /7rmc+JCJCw9Lt0Nu5ZAy7xHSmRE+6YF3MKPgvv6IWIXfjoTGkNoYd+mfjbpTxTcOo8Yzb k5wCANtV8ad1ZxMsIq8FsK19dE7ptGs= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1662630679; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rLonqVoT3RhXGKfCH51i6qJuANJGJL+Z/J3Zqw4wpys=; b=F+gr7b/XjCITs17GNSyLv5TcJTx7cLh7uGTIjVRHxCGVyo9VOb+Fa2b21GOlDqa14XcZxT w2UR5OmAqm2FqyBg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id B4E0013A72; Thu, 8 Sep 2022 09:51:19 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id cHuOKxe7GWNrUgAAMHmgww (envelope-from ); Thu, 08 Sep 2022 09:51:19 +0000 From: Takashi Iwai To: Thomas Zimmermann Subject: [PATCH v3 06/12] drm/udl: Increase the default URB list size to 20 Date: Thu, 8 Sep 2022 11:51:09 +0200 Message-Id: <20220908095115.23396-7-tiwai@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220908095115.23396-1-tiwai@suse.de> References: <20220908095115.23396-1-tiwai@suse.de> MIME-Version: 1.0 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: Daniel Vetter , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" It seems that the current size (4) for the URB list is too small on some devices, and it resulted in the occasional stalls. Increase the default URB list size to 20 for working around it. Acked-by: Thomas Zimmermann Signed-off-by: Takashi Iwai --- drivers/gpu/drm/udl/udl_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c index 6aed6e0f669c..2b7eafd48ec2 100644 --- a/drivers/gpu/drm/udl/udl_main.c +++ b/drivers/gpu/drm/udl/udl_main.c @@ -20,7 +20,7 @@ #define NR_USB_REQUEST_CHANNEL 0x12 #define MAX_TRANSFER (PAGE_SIZE*16 - BULK_SIZE) -#define WRITES_IN_FLIGHT (4) +#define WRITES_IN_FLIGHT (20) #define MAX_VENDOR_DESCRIPTOR_SIZE 256 static int udl_parse_vendor_descriptor(struct udl_device *udl)