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drm/radeon: use pcie_get_readrq() and pcie_set_readrq() to simplify code

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Use pcie_get_readrq() and pcie_set_readrq() functions to simplify code.

Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yijing Wang 2013-09-09 21:13:08 +08:00 committed by Bjorn Helgaas
parent 9db008d0d9
commit c11592fea0
1 changed files with 6 additions and 13 deletions
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19
drivers/gpu/drm/radeon/evergreen.c
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@ -1174,23 +1174,16 @@ 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)