From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Luis R. Rodriguez" <mcgrof@suse.com>
Date: Thu, 09 Jul 2015 17:25:07 +0000
Subject: Re: [PATCH v5 1/3] video: fbdev: atyfb: clarify ioremap() base and length used
Message-Id: <20150709172507.GD7021@wotan.suse.de>
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To: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <syrjala@sci.fi>, Borislav Petkov <bp@suse.de>, Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>, Ville =?iso-8859-1?Q?Syrj=E4l=E4?= <ville.syrjala@linux.intel.com>, Andy Lutomirski <luto@amacapital.net>, Tomi Valkeinen <tomi.valkeinen@ti.com>, "Michael S. Tsirkin" <mst@redhat.com>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, linux-fbdev <linux-fbdev@vger.kernel.org>, "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>, Dave Airlie <airlied@redhat.com>, Toshi Kani <toshi.kani@hp.com>, Suresh Siddha <sbsiddha@gmail.com>, Linus Torvalds <torvalds@linux-foundation.org>, Thomas Gleixner <tglx@linutronix.de>, Juergen Gross <jgross@suse.com>, Daniel Vetter <daniel.vetter@ffwll.ch>, Antonino Daplas <adaplas@gmail.com>, Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>, Rob Clark <robdclark@gmail.com>, Mathias Krause <minipli@googlemail.com>, Andrzej Hajda <a.hajda@samsung.com>, Mel Gorman <mgorman@suse.de>, Vlastimil Babka <vbabka@suse.cz>, Davidlohr Bueso <dbueso@suse.de>

On Wed, Jul 08, 2015 at 11:38:49AM +0300, Ville Syrj=E4l=E4 wrote:
> On Tue, Jul 07, 2015 at 05:24:57PM -0700, Luis R. Rodriguez wrote:
> > On Thu, Jul 2, 2015 at 4:23 PM, Luis R. Rodriguez <mcgrof@suse.com> wro=
te:
> > > On Fri, Jun 26, 2015 at 12:30 AM, Borislav Petkov <bp@suse.de> wrote:
> > >> On Fri, Jun 26, 2015 at 03:09:27AM +0200, Luis R. Rodriguez wrote:
> > >>> Sure, mind this as a follow up patch if its too late?
> > >>
> > >> No need, you can send me an updated one - I'll replace it.
> > >
> > > Will do!
> >=20
> > OK the commend I'm adding:
> >=20
> > @@ -3489,6 +3489,15 @@ static int atyfb_setup_generic(struct pci_dev
> > *pdev, struct fb_info *info,
> >=20
> >         /* Map in frame buffer */
> >         info->fix.smem_start =3D addr;
> > +
> > +       /*
> > +        * The framebuffer is not always 8 MiB that's just the size of =
the
> > +        * PCI BAR, this is later corrected for use with write-combining
> > +        * helpers with aty_fudge_framebuffer_len() which will adjust t=
he
> > +        * framebuffer accordingly depending on the device.
>=20
> That somehow gives me the impression that aty_fudge_framebuffer_len()
> changes smem_len to match the framebuffer size, which it does
> not.
>=20
> Dunno, maybe something like this?
> /*
>  * The framebuffer is not always 8 MiB that's just the size of the
>  * PCI BAR. We temporarily abuse smem_len here to store the size
>  * of the BAR. aty_init() will later correct it to match the actual
>  * framebuffer size.
>  *
>  * On devices that don't have the auxiliary register aperture, the
>  * registers are housed at the top end of the framebuffer PCI BAR.
>  * aty_fudge_framebuffer_len() is used to reduce smem_len to not
>  * overlap with the registers.
>  */

Thanks Ville, I used that. Will send out a v6 series.

 Luis