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Date:   Mon, 7 Sep 2020 19:57:25 +0200
From:   Daniel Vetter <daniel@ffwll.ch>
To:     Vaibhav Gupta <vaibhavgupta40@gmail.com>
Cc:     Bjorn Helgaas <helgaas@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Bjorn Helgaas <bjorn@helgaas.com>,
        Vaibhav Gupta <vaibhav.varodek@gmail.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Thierry Reding <treding@nvidia.com>,
        linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org,
        Shuah Khan <skhan@linuxfoundation.org>,
        linux-kernel-mentees@lists.linuxfoundation.org
Subject: Re: [PATCH v1 0/2] video: fbdev: radeonfb: PCI PM framework upgrade
 and fix-ups.
Message-ID: <20200907175725.GX2352366@phenom.ffwll.local>
Mail-Followup-To: Vaibhav Gupta <vaibhavgupta40@gmail.com>,
        Bjorn Helgaas <helgaas@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Bjorn Helgaas <bjorn@helgaas.com>,
        Vaibhav Gupta <vaibhav.varodek@gmail.com>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
        Thierry Reding <thierry.reding@gmail.com>,
        Thierry Reding <treding@nvidia.com>, linux-fbdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        Shuah Khan <skhan@linuxfoundation.org>,
        linux-kernel-mentees@lists.linuxfoundation.org
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 <20200907075559.GN2352366@phenom.ffwll.local>
 <20200907091621.GA30377@gmail.com>
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On Mon, Sep 07, 2020 at 02:46:21PM +0530, Vaibhav Gupta wrote:
> On Mon, Sep 07, 2020 at 09:55:59AM +0200, Daniel Vetter wrote:
> > On Thu, Aug 06, 2020 at 12:52:54PM +0530, Vaibhav Gupta wrote:
> > > Linux Kernel Mentee: Remove Legacy Power Management. 
> > > 
> > > The original goal of the patch series is to upgrade the power management
> > > framework of radeonfb fbdev driver. This has been done by upgrading .suspend()
> > > and .resume() callbacks.
> > > 
> > > The upgrade makes sure that the involvement of PCI Core does not change the
> > > order of operations executed in a driver. Thus, does not change its behavior.
> > > 
> > > During this process, it was found that "#if defined(CONFIG_PM)" at line 1434 is
> > > redundant. This was introduced in the commit
> > > 42ddb453a0cd ("radeon: Conditionally compile PM code").
> > 
> > I do wonder whether it wouldn't be better to just outright delete these,
> > we have the drm radeon driver for pretty much all the same hardware ...
> > -Daniel
> > 
> Hello Daniel,
> I don't have any problem in either way. My priority is to get rid of the
> legacy .suspend and .resume pointers from "struct pci_driver" . Hence, modifying
> every driver that is using them.

Ok, also sounds like we can't just ditch it outright and merging your
patches makes sense.

Please note that Bart (he's usually picking up the fbdev patches) is on
vacations until next week, I guess he'll then go and vacuum up everything
for 5.10 as he usually does.

Cheers, Daniel

> 
> Vaibhav Gupta
> > > 
> > > ------------
> > > 
> > > Before 42ddb453a0cd:
> > > $ git show 65122f7e80b5:drivers/video/aty/radeon_pm.c | grep -n "#ifdef\|#if\|#else\|#endif\|#elif\|#ifndef"
> > > 
> > > Based on output in terminal:
> > > 
> > > 547:#ifdef CONFIG_PM
> > >        |-- 959:#ifdef CONFIG_PPC_PMAC
> > >        |-- 972:#endif
> > >        |-- 1291:#ifdef CONFIG_PPC_OF
> > >        |-- 1301:#endif /* CONFIG_PPC_OF */
> > >        |-- 1943:#ifdef CONFIG_PPC_OF
> > >                    |-- 2206:#if 0 /* Not ready yet */
> > >                    |-- 2508:#endif /* 0 */
> > >        |-- 2510:#endif /* CONFIG_PPC_OF */
> > >        |-- 2648:#ifdef CONFIG_PPC_PMAC
> > >        |-- 2654:#endif /* CONFIG_PPC_PMAC */
> > >        |-- 2768:#ifdef CONFIG_PPC_PMAC
> > >        |-- 2774:#endif /* CONFIG_PPC_PMAC */
> > >        |-- 2791:#ifdef CONFIG_PPC_OF__disabled
> > >        |-- 2801:#endif /* CONFIG_PPC_OF */
> > > 2803:#endif /* CONFIG_PM */
> > > 
> > > ------------
> > > 
> > > After 42ddb453a0cd:
> > > $ git show 42ddb453a0cd:drivers/video/aty/radeon_pm.c | grep -n "#ifdef\|#if\|#else\|#endif\|#elif\|#ifndef"
> > > 
> > > Based on output in terminal:
> > > 
> > > 547:#ifdef CONFIG_PM
> > >        |-- 959:#ifdef CONFIG_PPC_PMAC
> > >        |-- 972:#endif
> > >        |-- 1291:#ifdef CONFIG_PPC_OF
> > >        |-- 1301:#endif /* CONFIG_PPC_OF */
> > >        |-- 1430:#if defined(CONFIG_PM)
> > >                    |-- 1431:#if defined(CONFIG_X86) || defined(CONFIG_PPC_PMAC)
> > >                    |-- 1944:#endif
> > >                    |-- 1946:#ifdef CONFIG_PPC_OF
> > >                                |-- 1947:#ifdef CONFIG_PPC_PMAC
> > >                                |-- 2208:#endif
> > >                    |-- 2209:#endif
> > >                    |-- 2211:#if 0 /* Not ready yet */
> > >                    |-- 2513:#endif /* 0 */
> > >        |-- 2515:#endif /* CONFIG_PPC_OF */
> > >        |-- 2653:#ifdef CONFIG_PPC_PMAC
> > >        |-- 2659:#endif /* CONFIG_PPC_PMAC */
> > >        |-- 2773:#ifdef CONFIG_PPC_PMAC
> > >        |-- 2779:#endif /* CONFIG_PPC_PMAC */
> > >        |-- 2796:#ifdef CONFIG_PPC_OF__disabled
> > >        |-- 2806:#endif /* CONFIG_PPC_OF */
> > > 2808:#endif /* CONFIG_PM */
> > > 
> > > ------------
> > > 
> > > This also affected the CONFIG_PPC_OF container (line 1943 at commit 65122f7e80b5)
> > > 
> > > The patch-series fixes it along with PM upgrade.
> > > 
> > > All patches are compile-tested only.
> > > 
> > > Test tools:
> > >     - Compiler: gcc (GCC) 10.1.0
> > >     - allmodconfig build: make -j$(nproc) W=1 all
> > > 
> > > Vaibhav Gupta (2):
> > >   video: fbdev: aty: radeon_pm: remove redundant CONFIG_PM container
> > >   fbdev: radeonfb:use generic power management
> > > 
> > >  drivers/video/fbdev/aty/radeon_base.c | 10 ++++---
> > >  drivers/video/fbdev/aty/radeon_pm.c   | 38 ++++++++++++++++++++-------
> > >  drivers/video/fbdev/aty/radeonfb.h    |  3 +--
> > >  3 files changed, 35 insertions(+), 16 deletions(-)
> > > 
> > > -- 
> > > 2.27.0
> > > 
> > > _______________________________________________
> > > dri-devel mailing list
> > > dri-devel@lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> > 
> > -- 
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch