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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
commite5fd91f1ef340da553f7a79da9540c3db711c937 (patch)
treeb11842027dc6641da63f4bcc524f8678263304a3 /drivers/video/fbdev/vesafb.c
parent2a9b0348e685a63d97486f6749622b61e9e3292f (diff)
Linux-libre 4.2-gnu
Diffstat (limited to 'drivers/video/fbdev/vesafb.c')
-rw-r--r--drivers/video/fbdev/vesafb.c80
1 files changed, 28 insertions, 52 deletions
diff --git a/drivers/video/fbdev/vesafb.c b/drivers/video/fbdev/vesafb.c
index d79a0ac49..528fe917d 100644
--- a/drivers/video/fbdev/vesafb.c
+++ b/drivers/video/fbdev/vesafb.c
@@ -19,16 +19,20 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
+#include <linux/io.h>
#include <video/vga.h>
-#include <asm/io.h>
-#include <asm/mtrr.h>
#define dac_reg (0x3c8)
#define dac_val (0x3c9)
/* --------------------------------------------------------------------- */
+struct vesafb_par {
+ u32 pseudo_palette[256];
+ int wc_cookie;
+};
+
static struct fb_var_screeninfo vesafb_defined = {
.activate = FB_ACTIVATE_NOW,
.height = -1,
@@ -175,7 +179,10 @@ static int vesafb_setcolreg(unsigned regno, unsigned red, unsigned green,
static void vesafb_destroy(struct fb_info *info)
{
+ struct vesafb_par *par = info->par;
+
fb_dealloc_cmap(&info->cmap);
+ arch_phys_wc_del(par->wc_cookie);
if (info->screen_base)
iounmap(info->screen_base);
release_mem_region(info->apertures->ranges[0].base, info->apertures->ranges[0].size);
@@ -228,6 +235,7 @@ static int vesafb_setup(char *options)
static int vesafb_probe(struct platform_device *dev)
{
struct fb_info *info;
+ struct vesafb_par *par;
int i, err;
unsigned int size_vmode;
unsigned int size_remap;
@@ -291,14 +299,14 @@ static int vesafb_probe(struct platform_device *dev)
spaces our resource handlers simply don't know about */
}
- info = framebuffer_alloc(sizeof(u32) * 256, &dev->dev);
+ info = framebuffer_alloc(sizeof(struct vesafb_par), &dev->dev);
if (!info) {
release_mem_region(vesafb_fix.smem_start, size_total);
return -ENOMEM;
}
platform_set_drvdata(dev, info);
- info->pseudo_palette = info->par;
- info->par = NULL;
+ par = info->par;
+ info->pseudo_palette = par->pseudo_palette;
/* set vesafb aperture size for generic probing */
info->apertures = alloc_apertures(1);
@@ -404,60 +412,27 @@ static int vesafb_probe(struct platform_device *dev)
* region already (FIXME) */
request_region(0x3c0, 32, "vesafb");
-#ifdef CONFIG_MTRR
- if (mtrr) {
+ if (mtrr == 3) {
unsigned int temp_size = size_total;
- unsigned int type = 0;
-
- switch (mtrr) {
- case 1:
- type = MTRR_TYPE_UNCACHABLE;
- break;
- case 2:
- type = MTRR_TYPE_WRBACK;
- break;
- case 3:
- type = MTRR_TYPE_WRCOMB;
- break;
- case 4:
- type = MTRR_TYPE_WRTHROUGH;
- break;
- default:
- type = 0;
- break;
- }
- if (type) {
- int rc;
+ /* Find the largest power-of-two */
+ temp_size = roundup_pow_of_two(temp_size);
- /* Find the largest power-of-two */
- temp_size = roundup_pow_of_two(temp_size);
+ /* Try and find a power of two to add */
+ do {
+ par->wc_cookie =
+ arch_phys_wc_add(vesafb_fix.smem_start,
+ temp_size);
+ temp_size >>= 1;
+ } while (temp_size >= PAGE_SIZE && par->wc_cookie < 0);
- /* Try and find a power of two to add */
- do {
- rc = mtrr_add(vesafb_fix.smem_start, temp_size,
- type, 1);
- temp_size >>= 1;
- } while (temp_size >= PAGE_SIZE && rc == -EINVAL);
- }
- }
-#endif
-
- switch (mtrr) {
- case 1: /* uncachable */
- info->screen_base = ioremap_nocache(vesafb_fix.smem_start, vesafb_fix.smem_len);
- break;
- case 2: /* write-back */
- info->screen_base = ioremap_cache(vesafb_fix.smem_start, vesafb_fix.smem_len);
- break;
- case 3: /* write-combining */
info->screen_base = ioremap_wc(vesafb_fix.smem_start, vesafb_fix.smem_len);
- break;
- case 4: /* write-through */
- default:
+ } else {
+ if (mtrr && mtrr != 3)
+ WARN_ONCE(1, "Only MTRR_TYPE_WRCOMB (3) make sense\n");
info->screen_base = ioremap(vesafb_fix.smem_start, vesafb_fix.smem_len);
- break;
}
+
if (!info->screen_base) {
printk(KERN_ERR
"vesafb: abort, cannot ioremap video memory 0x%x @ 0x%lx\n",
@@ -492,6 +467,7 @@ static int vesafb_probe(struct platform_device *dev)
fb_info(info, "%s frame buffer device\n", info->fix.id);
return 0;
err:
+ arch_phys_wc_del(par->wc_cookie);
if (info->screen_base)
iounmap(info->screen_base);
framebuffer_release(info);