From patchwork Sun Feb 9 08:48:25 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Antti Palosaari X-Patchwork-Id: 3612231 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 1F942C02E3 for ; Sun, 9 Feb 2014 08:51:46 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5F9AA2010B for ; Sun, 9 Feb 2014 08:51:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A1319200DC for ; Sun, 9 Feb 2014 08:51:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752046AbaBIIvb (ORCPT ); Sun, 9 Feb 2014 03:51:31 -0500 Received: from mail.kapsi.fi ([217.30.184.167]:50617 "EHLO mail.kapsi.fi" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751797AbaBIIt5 (ORCPT ); Sun, 9 Feb 2014 03:49:57 -0500 Received: from [82.128.187.60] (helo=localhost.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.72) (envelope-from ) id 1WCQ5M-0007At-G9; Sun, 09 Feb 2014 10:49:56 +0200 From: Antti Palosaari To: linux-media@vger.kernel.org Cc: Antti Palosaari Subject: [REVIEW PATCH 20/86] rtl2832_sdr: increase USB buffers Date: Sun, 9 Feb 2014 10:48:25 +0200 Message-Id: <1391935771-18670-21-git-send-email-crope@iki.fi> X-Mailer: git-send-email 1.8.5.3 In-Reply-To: <1391935771-18670-1-git-send-email-crope@iki.fi> References: <1391935771-18670-1-git-send-email-crope@iki.fi> X-SA-Exim-Connect-IP: 82.128.187.60 X-SA-Exim-Mail-From: crope@iki.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Increase USB xfer buffers heavily in order handle wider data stream. Stream is quite heavy, over 50Mbit/sec, when sampling rates are increased up to 3.2Msps. With remote controller interrupts disabled and huge USB buffers it seems to perform even 3.2Msps rather well. Signed-off-by: Antti Palosaari --- drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c index 348df05..4b8c016 100644 --- a/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c +++ b/drivers/staging/media/rtl2832u_sdr/rtl2832_sdr.c @@ -51,8 +51,8 @@ #define V4L2_PIX_FMT_SDR_U8 v4l2_fourcc('D', 'U', '0', '8') /* unsigned 8-bit */ -#define MAX_BULK_BUFS (8) -#define BULK_BUFFER_SIZE (8 * 512) +#define MAX_BULK_BUFS (10) +#define BULK_BUFFER_SIZE (128 * 512) /* intermediate buffers with raw data from the USB device */ struct rtl2832_sdr_frame_buf {