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=-9.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 D88D2C433E3 for ; Wed, 5 Aug 2020 20:19:07 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A636422CAF for ; Wed, 5 Aug 2020 20:19:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="mkadEPoA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A636422CAF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-kernel-mentees-bounces@lists.linuxfoundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 63F82863DC; Wed, 5 Aug 2020 20:19:07 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id O7Uhu18CF88h; Wed, 5 Aug 2020 20:19:06 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id C6A7D86807; Wed, 5 Aug 2020 20:19:06 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id B5CF4C0050; Wed, 5 Aug 2020 20:19:06 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 4B6D0C004C for ; Wed, 5 Aug 2020 20:19:05 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 3A428863DC for ; Wed, 5 Aug 2020 20:19:05 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BIrTU3zp72P3 for ; Wed, 5 Aug 2020 20:19:04 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 22D7985FC7 for ; Wed, 5 Aug 2020 20:19:04 +0000 (UTC) Received: from localhost (mobile-166-175-186-42.mycingular.net [166.175.186.42]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 7C08722B42; Wed, 5 Aug 2020 20:19:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596658743; bh=9ZU3tOBOV62KtGOwY6EQ1jVnbWgX/1syfR1TvQSTbzc=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=mkadEPoAkce2xQobRg1rFSLi4AAEXKYR2DudqHgQ1JhFZKOtr4vqzaFll2OQC8sHb G9y3s6sJGan+0CJs8oa12+px1hLZ5Bv8Fx2uMxi70kHezueiX/D3jkB3xjfM0g12br M6mYiu3hVkbTRpwyksloYu+UcjiRznWrIDgIibJ0= Date: Wed, 5 Aug 2020 15:19:01 -0500 From: Bjorn Helgaas To: Vaibhav Gupta Message-ID: <20200805201901.GA529929@bjorn-Precision-5520> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200805180722.244008-2-vaibhavgupta40@gmail.com> Cc: linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, Antonino Daplas , Bartlomiej Zolnierkiewicz , Vaibhav Gupta , Florian Tobias Schandinat , Russell King , dri-devel@lists.freedesktop.org, linux-geode@lists.infradead.org, Paul Mackerras , Andres Salomon , Bjorn Helgaas , linux-kernel-mentees@lists.linuxfoundation.org, linux-arm-kernel@lists.infradead.org Subject: Re: [Linux-kernel-mentees] [PATCH v1 01/12] fbdev: gxfb: use generic power management X-BeenThere: linux-kernel-mentees@lists.linuxfoundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-kernel-mentees-bounces@lists.linuxfoundation.org Sender: "Linux-kernel-mentees" On Wed, Aug 05, 2020 at 11:37:11PM +0530, Vaibhav Gupta wrote: > Drivers using legacy power management .suspen()/.resume() callbacks > have to manage PCI states and device's PM states themselves. They also > need to take care of standard configuration registers. s/using legacy/using legacy PCI/ s/.suspen/.suspend/ (in all these patches) I wouldn't necessarily repost the whole series just for that (unless the maintainer wants it), but maybe update your branch so if you have occasion to repost for other reasons, this will be fixed. This particular driver actually doesn't *do* any of the PCI state or device PM state management you mention. And I don't see the "single 'struct dev_pm_ops'" you mention below -- I thought that meant you would have a single struct shared between drivers (I think you did that for IDE?), but that's not what you're doing. This driver has gxfb_pm_ops, the next has lxfb_pm_ops, etc. AFAICT the patches are fine, but the commit logs don't seem exactly accurate. > Switch to generic power management framework using a single > "struct dev_pm_ops" variable to take the unnecessary load from the driver. > This also avoids the need for the driver to directly call most of the PCI > helper functions and device power state control functions, as through > the generic framework PCI Core takes care of the necessary operations, > and drivers are required to do only device-specific jobs. > > Signed-off-by: Vaibhav Gupta > --- > drivers/video/fbdev/geode/gxfb.h | 5 ---- > drivers/video/fbdev/geode/gxfb_core.c | 36 ++++++++++++++------------ > drivers/video/fbdev/geode/suspend_gx.c | 4 --- > 3 files changed, 20 insertions(+), 25 deletions(-) > > diff --git a/drivers/video/fbdev/geode/gxfb.h b/drivers/video/fbdev/geode/gxfb.h > index d2e9c5c8e294..792c111c21e4 100644 > --- a/drivers/video/fbdev/geode/gxfb.h > +++ b/drivers/video/fbdev/geode/gxfb.h > @@ -21,7 +21,6 @@ struct gxfb_par { > void __iomem *dc_regs; > void __iomem *vid_regs; > void __iomem *gp_regs; > -#ifdef CONFIG_PM > int powered_down; > > /* register state, for power management functionality */ > @@ -36,7 +35,6 @@ struct gxfb_par { > uint64_t fp[FP_REG_COUNT]; > > uint32_t pal[DC_PAL_COUNT]; > -#endif > }; > > unsigned int gx_frame_buffer_size(void); > @@ -49,11 +47,8 @@ void gx_set_dclk_frequency(struct fb_info *info); > void gx_configure_display(struct fb_info *info); > int gx_blank_display(struct fb_info *info, int blank_mode); > > -#ifdef CONFIG_PM > int gx_powerdown(struct fb_info *info); > int gx_powerup(struct fb_info *info); > -#endif > - > > /* Graphics Processor registers (table 6-23 from the data book) */ > enum gp_registers { > diff --git a/drivers/video/fbdev/geode/gxfb_core.c b/drivers/video/fbdev/geode/gxfb_core.c > index d38a148d4746..44089b331f91 100644 > --- a/drivers/video/fbdev/geode/gxfb_core.c > +++ b/drivers/video/fbdev/geode/gxfb_core.c > @@ -322,17 +322,14 @@ static struct fb_info *gxfb_init_fbinfo(struct device *dev) > return info; > } > > -#ifdef CONFIG_PM > -static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state) > +static int __maybe_unused gxfb_suspend(struct device *dev) > { > - struct fb_info *info = pci_get_drvdata(pdev); > + struct fb_info *info = dev_get_drvdata(dev); > > - if (state.event == PM_EVENT_SUSPEND) { > - console_lock(); > - gx_powerdown(info); > - fb_set_suspend(info, 1); > - console_unlock(); > - } > + console_lock(); > + gx_powerdown(info); > + fb_set_suspend(info, 1); > + console_unlock(); > > /* there's no point in setting PCI states; we emulate PCI, so > * we don't end up getting power savings anyways */ > @@ -340,9 +337,9 @@ static int gxfb_suspend(struct pci_dev *pdev, pm_message_t state) > return 0; > } > > -static int gxfb_resume(struct pci_dev *pdev) > +static int __maybe_unused gxfb_resume(struct device *dev) > { > - struct fb_info *info = pci_get_drvdata(pdev); > + struct fb_info *info = dev_get_drvdata(dev); > int ret; > > console_lock(); > @@ -356,7 +353,6 @@ static int gxfb_resume(struct pci_dev *pdev) > console_unlock(); > return 0; > } > -#endif > > static int gxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) > { > @@ -467,15 +463,23 @@ static const struct pci_device_id gxfb_id_table[] = { > > MODULE_DEVICE_TABLE(pci, gxfb_id_table); > > +static const struct dev_pm_ops gxfb_pm_ops = { > +#ifdef CONFIG_PM_SLEEP > + .suspend = gxfb_suspend, > + .resume = gxfb_resume, > + .freeze = NULL, > + .thaw = gxfb_resume, > + .poweroff = NULL, > + .restore = gxfb_resume, > +#endif > +}; > + > static struct pci_driver gxfb_driver = { > .name = "gxfb", > .id_table = gxfb_id_table, > .probe = gxfb_probe, > .remove = gxfb_remove, > -#ifdef CONFIG_PM > - .suspend = gxfb_suspend, > - .resume = gxfb_resume, > -#endif > + .driver.pm = &gxfb_pm_ops, > }; > > #ifndef MODULE > diff --git a/drivers/video/fbdev/geode/suspend_gx.c b/drivers/video/fbdev/geode/suspend_gx.c > index 1110a527c35c..8c49d4e98772 100644 > --- a/drivers/video/fbdev/geode/suspend_gx.c > +++ b/drivers/video/fbdev/geode/suspend_gx.c > @@ -11,8 +11,6 @@ > > #include "gxfb.h" > > -#ifdef CONFIG_PM > - > static void gx_save_regs(struct gxfb_par *par) > { > int i; > @@ -259,5 +257,3 @@ int gx_powerup(struct fb_info *info) > par->powered_down = 0; > return 0; > } > - > -#endif > -- > 2.27.0 > _______________________________________________ Linux-kernel-mentees mailing list Linux-kernel-mentees@lists.linuxfoundation.org https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees