From patchwork Thu Jul 9 14:51:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Doug Anderson X-Patchwork-Id: 11654525 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A0586618 for ; Thu, 9 Jul 2020 14:52:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 88C1E207DD for ; Thu, 9 Jul 2020 14:52:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="WkTWta+y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727978AbgGIOwD (ORCPT ); Thu, 9 Jul 2020 10:52:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727966AbgGIOwB (ORCPT ); Thu, 9 Jul 2020 10:52:01 -0400 Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C031C08C5DC for ; Thu, 9 Jul 2020 07:52:01 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id q17so1117462pfu.8 for ; Thu, 09 Jul 2020 07:52:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=wCNwMOLhre6TIcq+xE46mgH66EUQUlkzmi0iFanIr+c=; b=WkTWta+ygkvsjDeZrol+0SHhzLZKtwtnb673F6gAaZMkqleJ8hiEXTNVtZz0D5wm35 HIiDkEuL8lED8JHA1IRt2pWRlS0BU4poa+UoVJ9MFyPpuYrBGbwLf3DtpNv0iflVbEyW RL/AP0progn0ni332mJbpS8NZX0+9QA5viaQI= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=wCNwMOLhre6TIcq+xE46mgH66EUQUlkzmi0iFanIr+c=; b=rrp3iHI/aQl9Vb/GRAZMxZmS77f37hdzYa5uZFBpSDrXF2+p1nEBfyZwD0xEQMFAay EUKRj+qGu1w8CMmKGhKHDybRzSBMAydkbnmogeY5atoZLCc4ulB8R9hB+lJJE/sTH+BM JLYACN2Wsq/aS2/CxcbE7SyDh8sY+ae9djcjo2fV8T5Z7tip+vdqx0RscRndLJq4oIDQ PtXTn4BhJq5d3P97vJwqFjA/hWW7X3LBaI9uagL2HF+Av9Jf3HgCeB3x5eKkz4cHz0to wgQpn3v+HDZICZAbnSVjsU7fQaE879bLxqE7be6GXO13xZPfaOQF9jDqHs2pkAr+pwnI Uo5Q== X-Gm-Message-State: AOAM531INLjSA9L0SuCnD3M7KVqDqA/AswYES/3ywvGccVNy8zMkcu+v gZzeCqCLFth4kXj/irzKRXQcnQ== X-Google-Smtp-Source: ABdhPJxldIWJwLmpIX2peiSkmv54/xjNeufkBsdu52lnXuDQk24y73KFZqffxuh+HiL7VvA/bCniyg== X-Received: by 2002:aa7:8ac3:: with SMTP id b3mr61856209pfd.45.1594306320783; Thu, 09 Jul 2020 07:52:00 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:42b0:34ff:fe3d:58e6]) by smtp.gmail.com with ESMTPSA id m1sm2791322pjy.0.2020.07.09.07.51.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 09 Jul 2020 07:52:00 -0700 (PDT) From: Douglas Anderson To: Mark Brown , Andy Gross , Bjorn Andersson Cc: swboyd@chromium.org, linux-arm-msm@vger.kernel.org, ctheegal@codeaurora.org, mkshah@codeaurora.org, mka@chromium.org, Rajendra Nayak , akashast@codeaurora.org, georgi.djakov@linaro.org, Douglas Anderson , Mukesh Kumar Savaliya , linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org Subject: [PATCH v2 2/2] spi: spi-qcom-qspi: Set an autosuspend delay of 250 ms Date: Thu, 9 Jul 2020 07:51:45 -0700 Message-Id: <20200709075113.v2.2.I3c56d655737c89bd9b766567a04b0854db1a4152@changeid> X-Mailer: git-send-email 2.27.0.383.g050319c2ae-goog In-Reply-To: <20200709145145.4055619-1-dianders@chromium.org> References: <20200709145145.4055619-1-dianders@chromium.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org In commit cff80645d6d3 ("spi: spi-qcom-qspi: Add interconnect support") the spi_geni_runtime_suspend() and spi_geni_runtime_resume() became a bit slower. Measuring on my hardware I see numbers in the hundreds of microseconds now. Let's use autosuspend to help avoid some of the overhead. Now if we're doing a bunch of transfers we won't need to be constantly chruning. The number 250 ms for the autosuspend delay was picked a bit arbitrarily, so if someone has measurements showing a better value we could easily change this. Fixes: cff80645d6d3 ("spi: spi-qcom-qspi: Add interconnect support") Signed-off-by: Douglas Anderson Acked-by: Mark Brown Reviewed-by: Rajendra Nayak Tested-by: Rajendra Nayak Reviewed-by: Mukesh Kumar Savaliya --- This patch could go through the SPI tree or land in the Qualcomm tree. The patch it Fixes is currently in the Qualcomm tree so if it lands in the main SPI tree there'd be a bit of a perf regression in the Qualcomm tree until things merge together in mainline. Changes in v2: None drivers/spi/spi-qcom-qspi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-qcom-qspi.c b/drivers/spi/spi-qcom-qspi.c index 8fedc605ab7f..b8857a97f40a 100644 --- a/drivers/spi/spi-qcom-qspi.c +++ b/drivers/spi/spi-qcom-qspi.c @@ -553,6 +553,8 @@ static int qcom_qspi_probe(struct platform_device *pdev) goto exit_probe_master_put; } + pm_runtime_use_autosuspend(dev); + pm_runtime_set_autosuspend_delay(dev, 250); pm_runtime_enable(dev); ret = spi_register_master(master);