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Subject[PATCH v2 4/5] gxt4500: Use arch_phys_wc_* for framebuffer
Date
Add arch_phys_wc_* calls to allow write-combining using MTRR.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
---
drivers/video/fbdev/gxt4500.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/gxt4500.c b/drivers/video/fbdev/gxt4500.c
index 3ceddb8..31de650 100644
--- a/drivers/video/fbdev/gxt4500.c
+++ b/drivers/video/fbdev/gxt4500.c
@@ -142,7 +142,7 @@ static const unsigned char watfmt[] = {

struct gxt4500_par {
void __iomem *regs;
-
+ int wc_cookie;
int pixfmt; /* pixel format, see DFA_PIX_* values */

/* PLL parameters */
@@ -671,6 +671,9 @@ static int gxt4500_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

pci_set_drvdata(pdev, info);

+ par->wc_cookie = arch_phys_wc_add(info->fix.smem_start,
+ info->fix.smem_len);
+
#ifdef __BIG_ENDIAN
/* Set byte-swapping for DFA aperture for all pixel sizes */
pci_write_config_dword(pdev, CFG_ENDIAN0, 0x333300);
@@ -735,6 +738,7 @@ static void gxt4500_remove(struct pci_dev *pdev)
return;
par = info->par;
unregister_framebuffer(info);
+ arch_phys_wc_del(par->wc_cookie);
fb_dealloc_cmap(&info->cmap);
iounmap(par->regs);
iounmap(info->screen_base);
--
Ondrej Zary


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