> -----Original Message-----
> From: Bjorn Helgaas [mailto:bhelg...@google.com]
> Sent: Friday, October 04, 2013 4:45 PM
> To: Yijing Wang
> Cc: David Airlie; linux-kernel@vger.kernel.org; linux-...@vger.kernel.org;
> Hanjun Guo; Deucher, Alexander; Koenig, Christian
> Subject: Re: [PATCH 6/6] radeon: Use pcie_get_readrq() and
> pcie_set_readrq() to simplify code
>
> [-cc unrelated folks, +cc Alex, Christian]
>
> On Mon, Sep 9, 2013 at 7:13 AM, Yijing Wang <wangyij...@huawei.com>
> wrote:
> > Use pcie_get_readrq() and pcie_set_readrq() functions to simplify code.
> >
> > Signed-off-by: Yijing Wang <wangyij...@huawei.com>
>
> I believe the following patch is correct, and I'd be happy to merge it
> via the PCI tree along with the rest of this series.
>
> But it'd be better to have an ack from Alex, and he might prefer to
> merge it directly.
Patch looks correct to me. Feel free to merge it via the pci tree.
Reviewed-by: Alex Deucher <alexander.deuc...@amd.com>
>
> Bjorn
>
> > ---
> > drivers/gpu/drm/radeon/evergreen.c | 19 ++++++-------------
> > 1 files changed, 6 insertions(+), 13 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/radeon/evergreen.c
> b/drivers/gpu/drm/radeon/evergreen.c
> > index d5b49e3..b191f92 100644
> > --- a/drivers/gpu/drm/radeon/evergreen.c
> > +++ b/drivers/gpu/drm/radeon/evergreen.c
> > @@ -1169,23 +1169,16 @@ int evergreen_set_uvd_clocks(struct
> radeon_device *rdev, u32 vclk, u32 dclk)
> >
> > void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
> > {
> > - u16 ctl, v;
> > - int err;
> > -
> > - err = pcie_capability_read_word(rdev->pdev, PCI_EXP_DEVCTL, &ctl);
> > - if (err)
> > - return;
> > -
> > - v = (ctl & PCI_EXP_DEVCTL_READRQ) >> 12;
> > + int readrq;
> > + u16 v;
> >
> > + readrq = pcie_get_readrq(rdev->pdev);
> > + v = ffs(readrq) - 8;
> > /* if bios or OS sets MAX_READ_REQUEST_SIZE to an invalid value,
> > fix it
> > * to avoid hangs or perfomance issues
> > */
> > - if ((v == 0) || (v == 6) || (v == 7)) {
> > - ctl &= ~PCI_EXP_DEVCTL_READRQ;
> > - ctl |= (2 << 12);
> > - pcie_capability_write_word(rdev->pdev, PCI_EXP_DEVCTL, ctl);
> > - }
> > + if ((v == 0) || (v == 6) || (v == 7))
> > + pcie_set_readrq(rdev->pdev, 512);
> > }
> >
> > static bool dce4_is_in_vblank(struct radeon_device *rdev, int crtc)
> > --
> > 1.7.1
> >
> >
--
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