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 X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=ham 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 4DA88C433E1 for ; Mon, 17 Aug 2020 07:48:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1EAF420772 for ; Mon, 17 Aug 2020 07:48:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Zbh2ZDpx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726496AbgHQHsP (ORCPT ); Mon, 17 Aug 2020 03:48:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46724 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726194AbgHQHsO (ORCPT ); Mon, 17 Aug 2020 03:48:14 -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 31138C061388; Mon, 17 Aug 2020 00:48:14 -0700 (PDT) Received: by mail-pf1-x442.google.com with SMTP id x25so7835224pff.4; Mon, 17 Aug 2020 00:48:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=wi7uOh+yRtLfdGHBZ3WK6CGtcfeUS/qkjXRc9sQSjvc=; b=Zbh2ZDpx5D7ecoMsmjdy0EZPc17mhOMQ+yg6h9NruYfGK34WnVFxgqtb3ALzVVwFjW +fQOuZxuwzoaBjKLFhJHTpRxl+41tCCCAvNdTjbUvmKX4DCUH2imMS/IDINbDFEm8o14 IZYTsGs25owiK+EZnJmh/I8SHam1odD/s+4vnAWqreIEGAWJQYqNVrpMo4xHS6l4q+Dt uZ717gj9zeYVjZcaRC2Cdkhkkdk5SMJX68fcUrPafwrcQkuF95Bs1DR5vrdxo8q60qwc NgaROWjOxuRyo4fNRoR4JEBt3XvWexmjtiTiObf7bEyOxfXMr5qzXXvuboSTaTps4Edz wp6w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=wi7uOh+yRtLfdGHBZ3WK6CGtcfeUS/qkjXRc9sQSjvc=; b=DaSkS87yUvhWitojQczrVf78NYtbGsE23MEzvIHTqAou46Epx5aaErihpXMSsDTZfp JES6e9qI48yzTRh5cRUzxVgumz3u5yfsvV5OdJn5ersklVJD4KuytVbwoZd51W1CBTt8 D98yp0r4wQsyKAmEvrvpXnst9hnzIMze9mjr1zS4UNmvsD3XwFWU3Ti310OZvHZXVhXg syGIK4qjE276TU+MKHtLiGtDvnrUbkW6ggk0uDlrQciQ3B1FjYmJjwdXyR5Ig0xHpyTO +Gv2jXsLX5Y7dfZfiArFjPNcmwJlBElbZNMVGexiKG6Wvcyzn/+UCYJ+T6QkXWKeXMuz zU2g== X-Gm-Message-State: AOAM532+GCDzMHusen4nJztPvWRltmj62P3v2KhjhBZq2vNN5qrpB1D3 7a117nefLtCZrSE2LeJkeGg= X-Google-Smtp-Source: ABdhPJyH0PooAF7f8Gjqfs3WOBZbjkvwPWTfgVSpdwmSziet5j+X68Cf8uvMg8Xmk5uW4gSOtAOz0Q== X-Received: by 2002:a63:794e:: with SMTP id u75mr8901794pgc.50.1597650493498; Mon, 17 Aug 2020 00:48:13 -0700 (PDT) Received: from gmail.com ([103.105.152.86]) by smtp.gmail.com with ESMTPSA id mh14sm17112858pjb.23.2020.08.17.00.48.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Aug 2020 00:48:13 -0700 (PDT) Date: Mon, 17 Aug 2020 13:16:34 +0530 From: Vaibhav Gupta To: Sam Ravnborg Cc: Bjorn Helgaas , Bjorn Helgaas , Bjorn Helgaas , Vaibhav Gupta , Bartlomiej Zolnierkiewicz , Paul Mackerras , Russell King , Andres Salomon , Antonino Daplas , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-geode@lists.infradead.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linuxfoundation.org, Shuah Khan Subject: Re: [PATCH v2 09/12] fbdev: i740fb: use generic power management Message-ID: <20200817074634.GD5869@gmail.com> References: <20200810165458.GA292825@ravnborg.org> <20200810185723.15540-1-vaibhavgupta40@gmail.com> <20200810185723.15540-10-vaibhavgupta40@gmail.com> <20200816202442.GB1426650@ravnborg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200816202442.GB1426650@ravnborg.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Aug 16, 2020 at 10:24:42PM +0200, Sam Ravnborg wrote: > Hi Vaibhav > > On Tue, Aug 11, 2020 at 12:27:20AM +0530, Vaibhav Gupta wrote: > > Drivers should do only device-specific jobs. But in general, drivers using > > legacy PCI PM framework for .suspend()/.resume() have to manage many PCI > > PM-related tasks themselves which can be done by PCI Core itself. This > > brings extra load on the driver and it directly calls PCI helper functions > > to handle them. > > > > Switch to the new generic framework by updating function signatures and > > define a "struct dev_pm_ops" variable to bind PM callbacks. Also, remove > > unnecessary calls to the PCI Helper functions along with the legacy > > .suspend & .resume bindings. > > > > Signed-off-by: Vaibhav Gupta > > I several of the drivers I briefly looked at a new set of helpers were > introduced for the different types of pm actions. > They then called a more generic function that uses the passes > enumeration to decide what to do. > > But in this driver the test "state.event == PM_EVENT_FREEZE" is dropped > and there is no freeze operation. > Please explain this change so the reader is not left wondering. > > Sam > Okay, Thanks Vaibhav Gupta > > --- > > drivers/video/fbdev/i740fb.c | 40 +++++++++++++++--------------------- > > 1 file changed, 16 insertions(+), 24 deletions(-) > > > > diff --git a/drivers/video/fbdev/i740fb.c b/drivers/video/fbdev/i740fb.c > > index c65ec7386e87..8d7f06fc8a5a 100644 > > --- a/drivers/video/fbdev/i740fb.c > > +++ b/drivers/video/fbdev/i740fb.c > > @@ -1175,16 +1175,11 @@ static void i740fb_remove(struct pci_dev *dev) > > } > > } > > > > -#ifdef CONFIG_PM > > -static int i740fb_suspend(struct pci_dev *dev, pm_message_t state) > > +static int __maybe_unused i740fb_suspend(struct device *dev) > > { > > - struct fb_info *info = pci_get_drvdata(dev); > > + struct fb_info *info = dev_get_drvdata(dev); > > struct i740fb_par *par = info->par; > > > > - /* don't disable console during hibernation and wakeup from it */ > > - if (state.event == PM_EVENT_FREEZE || state.event == PM_EVENT_PRETHAW) > > - return 0; > > - > > console_lock(); > > mutex_lock(&(par->open_lock)); > > > > @@ -1197,19 +1192,15 @@ static int i740fb_suspend(struct pci_dev *dev, pm_message_t state) > > > > fb_set_suspend(info, 1); > > > > - pci_save_state(dev); > > - pci_disable_device(dev); > > - pci_set_power_state(dev, pci_choose_state(dev, state)); > > - > > mutex_unlock(&(par->open_lock)); > > console_unlock(); > > > > return 0; > > } > > > > -static int i740fb_resume(struct pci_dev *dev) > > +static int __maybe_unused i740fb_resume(struct device *dev) > > { > > - struct fb_info *info = pci_get_drvdata(dev); > > + struct fb_info *info = dev_get_drvdata(dev); > > struct i740fb_par *par = info->par; > > > > console_lock(); > > @@ -1218,11 +1209,6 @@ static int i740fb_resume(struct pci_dev *dev) > > if (par->ref_count == 0) > > goto fail; > > > > - pci_set_power_state(dev, PCI_D0); > > - pci_restore_state(dev); > > - if (pci_enable_device(dev)) > > - goto fail; > > - > > i740fb_set_par(info); > > fb_set_suspend(info, 0); > > > > @@ -1231,10 +1217,17 @@ static int i740fb_resume(struct pci_dev *dev) > > console_unlock(); > > return 0; > > } > > -#else > > -#define i740fb_suspend NULL > > -#define i740fb_resume NULL > > -#endif /* CONFIG_PM */ > > + > > +static const struct dev_pm_ops i740fb_pm_ops = { > > +#ifdef CONFIG_PM_SLEEP > > + .suspend = i740fb_suspend, > > + .resume = i740fb_resume, > > + .freeze = NULL, > > + .thaw = i740fb_resume, > > + .poweroff = i740fb_suspend, > > + .restore = i740fb_resume, > > +#endif /* CONFIG_PM_SLEEP */ > > +}; > > > > #define I740_ID_PCI 0x00d1 > > #define I740_ID_AGP 0x7800 > > @@ -1251,8 +1244,7 @@ static struct pci_driver i740fb_driver = { > > .id_table = i740fb_id_table, > > .probe = i740fb_probe, > > .remove = i740fb_remove, > > - .suspend = i740fb_suspend, > > - .resume = i740fb_resume, > > + .driver.pm = &i740fb_pm_ops, > > }; > > > > #ifndef MODULE > > -- > > 2.27.0