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kernel_samsung_sm7125/drivers/video/intelfb/intelfbdrv.c

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/*
* intelfb
*
* Linux framebuffer driver for Intel(R) 830M/845G/852GM/855GM/865G/915G
* integrated graphics chips.
*
* Copyright © 2002, 2003 David Dawes <dawes@xfree86.org>
* 2004 Sylvain Meyer
*
* This driver consists of two parts. The first part (intelfbdrv.c) provides
* the basic fbdev interfaces, is derived in part from the radeonfb and
* vesafb drivers, and is covered by the GPL. The second part (intelfbhw.c)
* provides the code to program the hardware. Most of it is derived from
* the i810/i830 XFree86 driver. The HW-specific code is covered here
* under a dual license (GPL and MIT/XFree86 license).
*
* Author: David Dawes
*
*/
/* $DHD: intelfb/intelfbdrv.c,v 1.20 2003/06/27 15:17:40 dawes Exp $ */
/*
* Changes:
* 01/2003 - Initial driver (0.1.0), no mode switching, no acceleration.
* This initial version is a basic core that works a lot like
* the vesafb driver. It must be built-in to the kernel,
* and the initial video mode must be set with vga=XXX at
* boot time. (David Dawes)
*
* 01/2003 - Version 0.2.0: Mode switching added, colormap support
* implemented, Y panning, and soft screen blanking implemented.
* No acceleration yet. (David Dawes)
*
* 01/2003 - Version 0.3.0: fbcon acceleration support added. Module
* option handling added. (David Dawes)
*
* 01/2003 - Version 0.4.0: fbcon HW cursor support added. (David Dawes)
*
* 01/2003 - Version 0.4.1: Add auto-generation of built-in modes.
* (David Dawes)
*
* 02/2003 - Version 0.4.2: Add check for active non-CRT devices, and
* mode validation checks. (David Dawes)
*
* 02/2003 - Version 0.4.3: Check when the VC is in graphics mode so that
* acceleration is disabled while an XFree86 server is running.
* (David Dawes)
*
* 02/2003 - Version 0.4.4: Monitor DPMS support. (David Dawes)
*
* 02/2003 - Version 0.4.5: Basic XFree86 + fbdev working. (David Dawes)
*
* 02/2003 - Version 0.5.0: Modify to work with the 2.5.32 kernel as well
* as 2.4.x kernels. (David Dawes)
*
* 02/2003 - Version 0.6.0: Split out HW-specifics into a separate file.
* (David Dawes)
*
* 02/2003 - Version 0.7.0: Test on 852GM/855GM. Acceleration and HW
* cursor are disabled on this platform. (David Dawes)
*
* 02/2003 - Version 0.7.1: Test on 845G. Acceleration is disabled
* on this platform. (David Dawes)
*
* 02/2003 - Version 0.7.2: Test on 830M. Acceleration and HW
* cursor are disabled on this platform. (David Dawes)
*
* 02/2003 - Version 0.7.3: Fix 8-bit modes for mobile platforms
* (David Dawes)
*
* 02/2003 - Version 0.7.4: Add checks for FB and FBCON_HAS_CFB* configured
* in the kernel, and add mode bpp verification and default
* bpp selection based on which FBCON_HAS_CFB* are configured.
* (David Dawes)
*
* 02/2003 - Version 0.7.5: Add basic package/install scripts based on the
* DRI packaging scripts. (David Dawes)
*
* 04/2003 - Version 0.7.6: Fix typo that affects builds with SMP-enabled
* kernels. (David Dawes, reported by Anupam).
*
* 06/2003 - Version 0.7.7:
* Fix Makefile.kernel build problem (Tsutomu Yasuda).
* Fix mis-placed #endif (2.4.21 kernel).
*
* 09/2004 - Version 0.9.0 - by Sylvain Meyer
* Port to linux 2.6 kernel fbdev
* Fix HW accel and HW cursor on i845G
* Use of agpgart for fb memory reservation
* Add mtrr support
*
* 10/2004 - Version 0.9.1
* Use module_param instead of old MODULE_PARM
* Some cleanup
*
* 11/2004 - Version 0.9.2
* Add vram option to reserve more memory than stolen by BIOS
* Fix intelfbhw_pan_display typo
* Add __initdata annotations
*
* TODO:
*
*
* Wish List:
*
*
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/fb.h>
#include <linux/console.h>
#include <linux/selection.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
#include <linux/kd.h>
#include <linux/vt_kern.h>
#include <linux/pagemap.h>
#include <linux/version.h>
#include <asm/io.h>
#ifdef CONFIG_MTRR
#include <asm/mtrr.h>
#endif
#include "intelfb.h"
#include "intelfbdrv.h"
#include "intelfbhw.h"
/*
* Limiting the class to PCI_CLASS_DISPLAY_VGA prevents function 1 of the
* mobile chipsets from being registered.
*/
#if DETECT_VGA_CLASS_ONLY
#define INTELFB_CLASS_MASK ~0 << 8
#else
#define INTELFB_CLASS_MASK 0
#endif
static struct pci_device_id intelfb_pci_table[] __devinitdata = {
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_830M, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_830M },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_845G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_845G },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_85XGM, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_85XGM },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_865G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_865G },
{ PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_915G, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_DISPLAY_VGA << 8, INTELFB_CLASS_MASK, INTEL_915G },
{ 0, }
};
/* Global data */
static int num_registered = 0;
/* fb ops */
static struct fb_ops intel_fb_ops = {
.owner = THIS_MODULE,
.fb_check_var = intelfb_check_var,
.fb_set_par = intelfb_set_par,
.fb_setcolreg = intelfb_setcolreg,
.fb_blank = intelfb_blank,
.fb_pan_display = intelfb_pan_display,
.fb_fillrect = intelfb_fillrect,
.fb_copyarea = intelfb_copyarea,
.fb_imageblit = intelfb_imageblit,
.fb_cursor = intelfb_cursor,
.fb_sync = intelfb_sync,
.fb_ioctl = intelfb_ioctl
};
/* PCI driver module table */
static struct pci_driver intelfb_driver = {
.name = "Intel(R) " SUPPORTED_CHIPSETS " Framebuffer Driver",
.id_table = intelfb_pci_table,
.probe = intelfb_pci_register,
.remove = __devexit_p(intelfb_pci_unregister)
};
/* Module description/parameters */
MODULE_AUTHOR("David Dawes <dawes@tungstengraphics.com>, "
"Sylvain Meyer <sylvain.meyer@worldonline.fr>");
MODULE_DESCRIPTION(
"Framebuffer driver for Intel(R) " SUPPORTED_CHIPSETS " chipsets");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DEVICE_TABLE(pci, intelfb_pci_table);
static int accel __initdata = 1;
static int vram __initdata = 4;
static int hwcursor __initdata = 1;
static int mtrr __initdata = 1;
static int fixed __initdata = 0;
static int noinit __initdata = 0;
static int noregister __initdata = 0;
static int probeonly __initdata = 0;
static int idonly __initdata = 0;
static int bailearly __initdata = 0;
static char *mode __initdata = NULL;
module_param(accel, bool, S_IRUGO);
MODULE_PARM_DESC(accel, "Enable console acceleration");
module_param(vram, int, S_IRUGO);
MODULE_PARM_DESC(vram, "System RAM to allocate to framebuffer in MiB");
module_param(hwcursor, bool, S_IRUGO);
MODULE_PARM_DESC(hwcursor, "Enable HW cursor");
module_param(mtrr, bool, S_IRUGO);
MODULE_PARM_DESC(mtrr, "Enable MTRR support");
module_param(fixed, bool, S_IRUGO);
MODULE_PARM_DESC(fixed, "Disable mode switching");
module_param(noinit, bool, 0);
MODULE_PARM_DESC(noinit, "Don't initialise graphics mode when loading");
module_param(noregister, bool, 0);
MODULE_PARM_DESC(noregister, "Don't register, just probe and exit (debug)");
module_param(probeonly, bool, 0);
MODULE_PARM_DESC(probeonly, "Do a minimal probe (debug)");
module_param(idonly, bool, 0);
MODULE_PARM_DESC(idonly, "Just identify without doing anything else (debug)");
module_param(bailearly, bool, 0);
MODULE_PARM_DESC(bailearly, "Bail out early, depending on value (debug)");
module_param(mode, charp, S_IRUGO);
MODULE_PARM_DESC(mode,
"Initial video mode \"<xres>x<yres>[-<depth>][@<refresh>]\"");
#ifndef MODULE
#define OPT_EQUAL(opt, name) (!strncmp(opt, name, strlen(name)))
#define OPT_INTVAL(opt, name) simple_strtoul(opt + strlen(name), NULL, 0)
#define OPT_STRVAL(opt, name) (opt + strlen(name))
static __inline__ char *
get_opt_string(const char *this_opt, const char *name)
{
const char *p;
int i;
char *ret;
p = OPT_STRVAL(this_opt, name);
i = 0;
while (p[i] && p[i] != ' ' && p[i] != ',')
i++;
ret = kmalloc(i + 1, GFP_KERNEL);
if (ret) {
strncpy(ret, p, i);
ret[i] = '\0';
}
return ret;
}
static __inline__ int
get_opt_int(const char *this_opt, const char *name, int *ret)
{
if (!ret)
return 0;
if (!OPT_EQUAL(this_opt, name))
return 0;
*ret = OPT_INTVAL(this_opt, name);
return 1;
}
static __inline__ int
get_opt_bool(const char *this_opt, const char *name, int *ret)
{
if (!ret)
return 0;
if (OPT_EQUAL(this_opt, name)) {
if (this_opt[strlen(name)] == '=')
*ret = simple_strtoul(this_opt + strlen(name) + 1,
NULL, 0);
else
*ret = 1;
} else {
if (OPT_EQUAL(this_opt, "no") && OPT_EQUAL(this_opt + 2, name))
*ret = 0;
else
return 0;
}
return 1;
}
static int __init
intelfb_setup(char *options)
{
char *this_opt;
DBG_MSG("intelfb_setup\n");
if (!options || !*options) {
DBG_MSG("no options\n");
return 0;
} else
DBG_MSG("options: %s\n", options);
/*
* These are the built-in options analogous to the module parameters
* defined above.
*
* The syntax is:
*
* video=intelfb:[mode][,<param>=<val>] ...
*
* e.g.,
*
* video=intelfb:1024x768-16@75,accel=0
*/
while ((this_opt = strsep(&options, ","))) {
if (!*this_opt)
continue;
if (get_opt_bool(this_opt, "accel", &accel))
;
else if (get_opt_int(this_opt, "vram", &vram))
;
else if (get_opt_bool(this_opt, "hwcursor", &hwcursor))
;
else if (get_opt_bool(this_opt, "mtrr", &mtrr))
;
else if (get_opt_bool(this_opt, "fixed", &fixed))
;
else if (get_opt_bool(this_opt, "init", &noinit))
noinit = !noinit;
else if (OPT_EQUAL(this_opt, "mode="))
mode = get_opt_string(this_opt, "mode=");
else
mode = this_opt;
}
return 0;
}
#endif
static int __init
intelfb_init(void)
{
#ifndef MODULE
char *option = NULL;
#endif
DBG_MSG("intelfb_init\n");
INF_MSG("Framebuffer driver for "
"Intel(R) " SUPPORTED_CHIPSETS " chipsets\n");
INF_MSG("Version " INTELFB_VERSION "\n");
if (idonly)
return -ENODEV;
#ifndef MODULE
if (fb_get_options("intelfb", &option))
return -ENODEV;
intelfb_setup(option);
#endif
return pci_register_driver(&intelfb_driver);
}
static void __exit
intelfb_exit(void)
{
DBG_MSG("intelfb_exit\n");
pci_unregister_driver(&intelfb_driver);
}
module_init(intelfb_init);
module_exit(intelfb_exit);
/***************************************************************
* mtrr support functions *
***************************************************************/
#ifdef CONFIG_MTRR
static inline void __devinit set_mtrr(struct intelfb_info *dinfo)
{
dinfo->mtrr_reg = mtrr_add(dinfo->aperture.physical,
dinfo->aperture.size, MTRR_TYPE_WRCOMB, 1);
if (dinfo->mtrr_reg < 0) {
ERR_MSG("unable to set MTRR\n");
return;
}
dinfo->has_mtrr = 1;
}
static inline void unset_mtrr(struct intelfb_info *dinfo)
{
if (dinfo->has_mtrr)
mtrr_del(dinfo->mtrr_reg, dinfo->aperture.physical,
dinfo->aperture.size);
}
#else
#define set_mtrr(x) WRN_MSG("MTRR is disabled in the kernel\n")
#define unset_mtrr(x) do { } while (0)
#endif /* CONFIG_MTRR */
/***************************************************************
* driver init / cleanup *
***************************************************************/
static void
cleanup(struct intelfb_info *dinfo)
{
DBG_MSG("cleanup\n");
if (!dinfo)
return;
fb_dealloc_cmap(&dinfo->info->cmap);
kfree(dinfo->info->pixmap.addr);
if (dinfo->registered)
unregister_framebuffer(dinfo->info);
unset_mtrr(dinfo);
if (dinfo->fbmem_gart && dinfo->gtt_fb_mem) {
agp_unbind_memory(dinfo->gtt_fb_mem);
agp_free_memory(dinfo->gtt_fb_mem);
}
if (dinfo->gtt_cursor_mem) {
agp_unbind_memory(dinfo->gtt_cursor_mem);
agp_free_memory(dinfo->gtt_cursor_mem);
}
if (dinfo->gtt_ring_mem) {
agp_unbind_memory(dinfo->gtt_ring_mem);
agp_free_memory(dinfo->gtt_ring_mem);
}
if (dinfo->mmio_base)
iounmap((void __iomem *)dinfo->mmio_base);
if (dinfo->aperture.virtual)
iounmap((void __iomem *)dinfo->aperture.virtual);
if (dinfo->mmio_base_phys)
release_mem_region(dinfo->mmio_base_phys, INTEL_REG_SIZE);
if (dinfo->aperture.physical)
release_mem_region(dinfo->aperture.physical,
dinfo->aperture.size);
framebuffer_release(dinfo->info);
}
#define bailout(dinfo) do { \
DBG_MSG("bailout\n"); \
cleanup(dinfo); \
INF_MSG("Not going to register framebuffer, exiting...\n"); \
return -ENODEV; \
} while (0)
static int __devinit
intelfb_pci_register(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct fb_info *info;
struct intelfb_info *dinfo;
int i, j, err, dvo;
int aperture_size, stolen_size;
struct agp_kern_info gtt_info;
int agp_memtype;
const char *s;
struct agp_bridge_data *bridge;
int aperture_bar = 0;
int mmio_bar = 1;
DBG_MSG("intelfb_pci_register\n");
num_registered++;
if (num_registered != 1) {
ERR_MSG("Attempted to register %d devices "
"(should be only 1).\n", num_registered);
return -ENODEV;
}
info = framebuffer_alloc(sizeof(struct intelfb_info), &pdev->dev);
if (!info) {
ERR_MSG("Could not allocate memory for intelfb_info.\n");
return -ENODEV;
}
if (fb_alloc_cmap(&info->cmap, 256, 1) < 0) {
ERR_MSG("Could not allocate cmap for intelfb_info.\n");
goto err_out_cmap;
return -ENODEV;
}
dinfo = info->par;
dinfo->info = info;
dinfo->fbops = &intel_fb_ops;
dinfo->pdev = pdev;
/* Reserve pixmap space. */
info->pixmap.addr = kmalloc(64 * 1024, GFP_KERNEL);
if (info->pixmap.addr == NULL) {
ERR_MSG("Cannot reserve pixmap memory.\n");
goto err_out_pixmap;
}
memset(info->pixmap.addr, 0, 64 * 1024);
/* set early this option because it could be changed by tv encoder
driver */
dinfo->fixed_mode = fixed;
/* Enable device. */
if ((err = pci_enable_device(pdev))) {
ERR_MSG("Cannot enable device.\n");
cleanup(dinfo);
return -ENODEV;
}
/* Set base addresses. */
if (ent->device == PCI_DEVICE_ID_INTEL_915G) {
aperture_bar = 2;
mmio_bar = 0;
/* Disable HW cursor on 915G (not implemented yet) */
hwcursor = 0;
}
dinfo->aperture.physical = pci_resource_start(pdev, aperture_bar);
dinfo->aperture.size = pci_resource_len(pdev, aperture_bar);
dinfo->mmio_base_phys = pci_resource_start(pdev, mmio_bar);
DBG_MSG("fb aperture: 0x%llx/0x%llx, MMIO region: 0x%llx/0x%llx\n",
(unsigned long long)pci_resource_start(pdev, aperture_bar),
(unsigned long long)pci_resource_len(pdev, aperture_bar),
(unsigned long long)pci_resource_start(pdev, mmio_bar),
(unsigned long long)pci_resource_len(pdev, mmio_bar));
/* Reserve the fb and MMIO regions */
if (!request_mem_region(dinfo->aperture.physical, dinfo->aperture.size,
INTELFB_MODULE_NAME)) {
ERR_MSG("Cannot reserve FB region.\n");
cleanup(dinfo);
return -ENODEV;
}
if (!request_mem_region(dinfo->mmio_base_phys,
INTEL_REG_SIZE,
INTELFB_MODULE_NAME)) {
ERR_MSG("Cannot reserve MMIO region.\n");
cleanup(dinfo);
return -ENODEV;
}
/* Map the fb and MMIO regions */
dinfo->aperture.virtual = (u8 __iomem *)ioremap_nocache
(dinfo->aperture.physical, dinfo->aperture.size);
if (!dinfo->aperture.virtual) {
ERR_MSG("Cannot remap FB region.\n");
cleanup(dinfo);
return -ENODEV;
}
dinfo->mmio_base =
(u8 __iomem *)ioremap_nocache(dinfo->mmio_base_phys,
INTEL_REG_SIZE);
if (!dinfo->mmio_base) {
ERR_MSG("Cannot remap MMIO region.\n");
cleanup(dinfo);
return -ENODEV;
}
/* Get the chipset info. */
dinfo->pci_chipset = pdev->device;
if (intelfbhw_get_chipset(pdev, &dinfo->name, &dinfo->chipset,
&dinfo->mobile)) {
cleanup(dinfo);
return -ENODEV;
}
if (intelfbhw_get_memory(pdev, &aperture_size,&stolen_size)) {
cleanup(dinfo);
return -ENODEV;
}
INF_MSG("%02x:%02x.%d: %s, aperture size %dMB, "
"stolen memory %dkB\n",
pdev->bus->number, PCI_SLOT(pdev->devfn),
PCI_FUNC(pdev->devfn), dinfo->name,
BtoMB(aperture_size), BtoKB(stolen_size));
/* Set these from the options. */
dinfo->accel = accel;
dinfo->hwcursor = hwcursor;
if (NOACCEL_CHIPSET(dinfo) && dinfo->accel == 1) {
INF_MSG("Acceleration is not supported for the %s chipset.\n",
dinfo->name);
dinfo->accel = 0;
}
/* Framebuffer parameters - Use all the stolen memory if >= vram */
if (ROUND_UP_TO_PAGE(stolen_size) >= MB(vram)) {
dinfo->fb.size = ROUND_UP_TO_PAGE(stolen_size);
dinfo->fbmem_gart = 0;
} else {
dinfo->fb.size = MB(vram);
dinfo->fbmem_gart = 1;
}
/* Allocate space for the ring buffer and HW cursor if enabled. */
if (dinfo->accel) {
dinfo->ring.size = RINGBUFFER_SIZE;
dinfo->ring_tail_mask = dinfo->ring.size - 1;
}
if (dinfo->hwcursor) {
dinfo->cursor.size = HW_CURSOR_SIZE;
}
/* Use agpgart to manage the GATT */
if (!(bridge = agp_backend_acquire(pdev))) {
ERR_MSG("cannot acquire agp\n");
cleanup(dinfo);
return -ENODEV;
}
/* get the current gatt info */
if (agp_copy_info(bridge, &gtt_info)) {
ERR_MSG("cannot get agp info\n");
agp_backend_release(bridge);
cleanup(dinfo);
return -ENODEV;
}
/* set the mem offsets - set them after the already used pages */
if (dinfo->accel) {
dinfo->ring.offset = (stolen_size >> 12)
+ gtt_info.current_memory;
}
if (dinfo->hwcursor) {
dinfo->cursor.offset = (stolen_size >> 12) +
+ gtt_info.current_memory + (dinfo->ring.size >> 12);
}
if (dinfo->fbmem_gart) {
dinfo->fb.offset = (stolen_size >> 12) +
+ gtt_info.current_memory + (dinfo->ring.size >> 12)
+ (dinfo->cursor.size >> 12);
}
/* Allocate memories (which aren't stolen) */
if (dinfo->accel) {
if (!(dinfo->gtt_ring_mem =
agp_allocate_memory(bridge, dinfo->ring.size >> 12,
AGP_NORMAL_MEMORY))) {
ERR_MSG("cannot allocate ring buffer memory\n");
agp_backend_release(bridge);
cleanup(dinfo);
return -ENOMEM;
}
if (agp_bind_memory(dinfo->gtt_ring_mem,
dinfo->ring.offset)) {
ERR_MSG("cannot bind ring buffer memory\n");
agp_backend_release(bridge);
cleanup(dinfo);
return -EBUSY;
}
dinfo->ring.physical = dinfo->aperture.physical
+ (dinfo->ring.offset << 12);
dinfo->ring.virtual = dinfo->aperture.virtual
+ (dinfo->ring.offset << 12);
dinfo->ring_head = dinfo->ring.virtual;
}
if (dinfo->hwcursor) {
agp_memtype = dinfo->mobile ? AGP_PHYSICAL_MEMORY
: AGP_NORMAL_MEMORY;
if (!(dinfo->gtt_cursor_mem =
agp_allocate_memory(bridge, dinfo->cursor.size >> 12,
agp_memtype))) {
ERR_MSG("cannot allocate cursor memory\n");
agp_backend_release(bridge);
cleanup(dinfo);
return -ENOMEM;
}
if (agp_bind_memory(dinfo->gtt_cursor_mem,
dinfo->cursor.offset)) {
ERR_MSG("cannot bind cursor memory\n");
agp_backend_release(bridge);
cleanup(dinfo);
return -EBUSY;
}
if (dinfo->mobile)
dinfo->cursor.physical
= dinfo->gtt_cursor_mem->physical;
else
dinfo->cursor.physical = dinfo->aperture.physical
+ (dinfo->cursor.offset << 12);
dinfo->cursor.virtual = dinfo->aperture.virtual
+ (dinfo->cursor.offset << 12);
}
if (dinfo->fbmem_gart) {
if (!(dinfo->gtt_fb_mem =
agp_allocate_memory(bridge, dinfo->fb.size >> 12,
AGP_NORMAL_MEMORY))) {
WRN_MSG("cannot allocate framebuffer memory - use "
"the stolen one\n");
dinfo->fbmem_gart = 0;
}
if (agp_bind_memory(dinfo->gtt_fb_mem,
dinfo->fb.offset)) {
WRN_MSG("cannot bind framebuffer memory - use "
"the stolen one\n");
dinfo->fbmem_gart = 0;
}
}
/* update framebuffer memory parameters */
if (!dinfo->fbmem_gart)
dinfo->fb.offset = 0; /* starts at offset 0 */
dinfo->fb.physical = dinfo->aperture.physical
+ (dinfo->fb.offset << 12);
dinfo->fb.virtual = dinfo->aperture.virtual + (dinfo->fb.offset << 12);
dinfo->fb_start = dinfo->fb.offset << 12;
/* release agpgart */
agp_backend_release(bridge);
if (mtrr)
set_mtrr(dinfo);
DBG_MSG("fb: 0x%x(+ 0x%x)/0x%x (0x%x)\n",
dinfo->fb.physical, dinfo->fb.offset, dinfo->fb.size,
(u32 __iomem ) dinfo->fb.virtual);
DBG_MSG("MMIO: 0x%x/0x%x (0x%x)\n",
dinfo->mmio_base_phys, INTEL_REG_SIZE,
(u32 __iomem) dinfo->mmio_base);
DBG_MSG("ring buffer: 0x%x/0x%x (0x%x)\n",
dinfo->ring.physical, dinfo->ring.size,
(u32 __iomem ) dinfo->ring.virtual);
DBG_MSG("HW cursor: 0x%x/0x%x (0x%x) (offset 0x%x) (phys 0x%x)\n",
dinfo->cursor.physical, dinfo->cursor.size,
(u32 __iomem ) dinfo->cursor.virtual, dinfo->cursor.offset,
dinfo->cursor.physical);
DBG_MSG("options: vram = %d, accel = %d, hwcursor = %d, fixed = %d, "
"noinit = %d\n", vram, accel, hwcursor, fixed, noinit);
DBG_MSG("options: mode = \"%s\"\n", mode ? mode : "");
if (probeonly)
bailout(dinfo);
/*
* Check if the LVDS port or any DVO ports are enabled. If so,
* don't allow mode switching
*/
dvo = intelfbhw_check_non_crt(dinfo);
if (dvo) {
dinfo->fixed_mode = 1;
WRN_MSG("Non-CRT device is enabled ( ");
i = 0;
while (dvo) {
if (dvo & 1) {
s = intelfbhw_dvo_to_string(1 << i);
if (s)
printk("%s ", s);
}
dvo >>= 1;
++i;
}
printk("). Disabling mode switching.\n");
}
if (bailearly == 1)
bailout(dinfo);
if (FIXED_MODE(dinfo) && ORIG_VIDEO_ISVGA != VIDEO_TYPE_VLFB) {
ERR_MSG("Video mode must be programmed at boot time.\n");
cleanup(dinfo);
return -ENODEV;
}
if (bailearly == 2)
bailout(dinfo);
/* Initialise dinfo and related data. */
/* If an initial mode was programmed at boot time, get its details. */
if (ORIG_VIDEO_ISVGA == VIDEO_TYPE_VLFB)
get_initial_mode(dinfo);
if (bailearly == 3)
bailout(dinfo);
if (FIXED_MODE(dinfo)) {
/* remap fb address */
update_dinfo(dinfo, &dinfo->initial_var);
}
if (bailearly == 4)
bailout(dinfo);
if (intelfb_set_fbinfo(dinfo)) {
cleanup(dinfo);
return -ENODEV;
}
if (bailearly == 5)
bailout(dinfo);
for (i = 0; i < 16; i++) {
j = color_table[i];
dinfo->palette[i].red = default_red[j];
dinfo->palette[i].green = default_grn[j];
dinfo->palette[i].blue = default_blu[j];
}
if (bailearly == 6)
bailout(dinfo);
pci_set_drvdata(pdev, dinfo);
/* Save the initial register state. */
i = intelfbhw_read_hw_state(dinfo, &dinfo->save_state,
bailearly > 6 ? bailearly - 6 : 0);
if (i != 0) {
DBG_MSG("intelfbhw_read_hw_state returned %d\n", i);
bailout(dinfo);
}
intelfbhw_print_hw_state(dinfo, &dinfo->save_state);
if (bailearly == 18)
bailout(dinfo);
/* Cursor initialisation */
if (dinfo->hwcursor) {
intelfbhw_cursor_init(dinfo);
intelfbhw_cursor_reset(dinfo);
}
if (bailearly == 19)
bailout(dinfo);
/* 2d acceleration init */
if (dinfo->accel)
intelfbhw_2d_start(dinfo);
if (bailearly == 20)
bailout(dinfo);
if (noregister)
bailout(dinfo);
if (register_framebuffer(dinfo->info) < 0) {
ERR_MSG("Cannot register framebuffer.\n");
cleanup(dinfo);
return -ENODEV;
}
dinfo->registered = 1;
return 0;
err_out_pixmap:
fb_dealloc_cmap(&info->cmap);
err_out_cmap:
framebuffer_release(info);
return -ENODEV;
}
static void __devexit
intelfb_pci_unregister(struct pci_dev *pdev)
{
struct intelfb_info *dinfo = pci_get_drvdata(pdev);
DBG_MSG("intelfb_pci_unregister\n");
if (!dinfo)
return;
cleanup(dinfo);
pci_set_drvdata(pdev, NULL);
}
/***************************************************************
* helper functions *
***************************************************************/
int __inline__
intelfb_var_to_depth(const struct fb_var_screeninfo *var)
{
DBG_MSG("intelfb_var_to_depth: bpp: %d, green.length is %d\n",
var->bits_per_pixel, var->green.length);
switch (var->bits_per_pixel) {
case 16:
return (var->green.length == 6) ? 16 : 15;
case 32:
return 24;
default:
return var->bits_per_pixel;
}
}
static __inline__ int
var_to_refresh(const struct fb_var_screeninfo *var)
{
int xtot = var->xres + var->left_margin + var->right_margin +
var->hsync_len;
int ytot = var->yres + var->upper_margin + var->lower_margin +
var->vsync_len;
return (1000000000 / var->pixclock * 1000 + 500) / xtot / ytot;
}
/***************************************************************
* Various intialisation functions *
***************************************************************/
static void __devinit
get_initial_mode(struct intelfb_info *dinfo)
{
struct fb_var_screeninfo *var;
int xtot, ytot;
DBG_MSG("get_initial_mode\n");
dinfo->initial_vga = 1;
dinfo->initial_fb_base = screen_info.lfb_base;
dinfo->initial_video_ram = screen_info.lfb_size * KB(64);
dinfo->initial_pitch = screen_info.lfb_linelength;
var = &dinfo->initial_var;
memset(var, 0, sizeof(*var));
var->xres = screen_info.lfb_width;
var->yres = screen_info.lfb_height;
var->bits_per_pixel = screen_info.lfb_depth;
switch (screen_info.lfb_depth) {
case 15:
var->bits_per_pixel = 16;
break;
case 24:
var->bits_per_pixel = 32;
break;
}
DBG_MSG("Initial info: FB is 0x%x/0x%x (%d kByte)\n",
dinfo->initial_fb_base, dinfo->initial_video_ram,
BtoKB(dinfo->initial_video_ram));
DBG_MSG("Initial info: mode is %dx%d-%d (%d)\n",
var->xres, var->yres, var->bits_per_pixel,
dinfo->initial_pitch);
/* Dummy timing values (assume 60Hz) */
var->left_margin = (var->xres / 8) & 0xf8;
var->right_margin = 32;
var->upper_margin = 16;
var->lower_margin = 4;
var->hsync_len = (var->xres / 8) & 0xf8;
var->vsync_len = 4;
xtot = var->xres + var->left_margin +
var->right_margin + var->hsync_len;
ytot = var->yres + var->upper_margin +
var->lower_margin + var->vsync_len;
var->pixclock = 10000000 / xtot * 1000 / ytot * 100 / 60;
var->height = -1;
var->width = -1;
if (var->bits_per_pixel > 8) {
var->red.offset = screen_info.red_pos;
var->red.length = screen_info.red_size;
var->green.offset = screen_info.green_pos;
var->green.length = screen_info.green_size;
var->blue.offset = screen_info.blue_pos;
var->blue.length = screen_info.blue_size;
var->transp.offset = screen_info.rsvd_pos;
var->transp.length = screen_info.rsvd_size;
} else {
var->red.length = 8;
var->green.length = 8;
var->blue.length = 8;
}
}
static int __devinit
intelfb_init_var(struct intelfb_info *dinfo)
{
struct fb_var_screeninfo *var;
int msrc = 0;
DBG_MSG("intelfb_init_var\n");
var = &dinfo->info->var;
if (FIXED_MODE(dinfo)) {
memcpy(var, &dinfo->initial_var,
sizeof(struct fb_var_screeninfo));
msrc = 5;
} else {
if (mode) {
msrc = fb_find_mode(var, dinfo->info, mode,
vesa_modes, VESA_MODEDB_SIZE,
NULL, 0);
if (msrc)
msrc |= 8;
}
if (!msrc) {
msrc = fb_find_mode(var, dinfo->info, PREFERRED_MODE,
vesa_modes, VESA_MODEDB_SIZE,
NULL, 0);
}
}
if (!msrc) {
ERR_MSG("Cannot find a suitable video mode.\n");
return 1;
}
INF_MSG("Initial video mode is %dx%d-%d@%d.\n", var->xres, var->yres,
var->bits_per_pixel, var_to_refresh(var));
DBG_MSG("Initial video mode is from %d.\n", msrc);
#if ALLOCATE_FOR_PANNING
/* Allow use of half of the video ram for panning */
var->xres_virtual = var->xres;
var->yres_virtual =
dinfo->fb.size / 2 / (var->bits_per_pixel * var->xres);
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
#else
var->yres_virtual = var->yres;
#endif
if (dinfo->accel)
var->accel_flags |= FB_ACCELF_TEXT;
else
var->accel_flags &= ~FB_ACCELF_TEXT;
return 0;
}
static int __devinit
intelfb_set_fbinfo(struct intelfb_info *dinfo)
{
struct fb_info *info = dinfo->info;
DBG_MSG("intelfb_set_fbinfo\n");
info->flags = FBINFO_FLAG_DEFAULT;
info->fbops = &intel_fb_ops;
info->pseudo_palette = dinfo->pseudo_palette;
info->pixmap.size = 64*1024;
info->pixmap.buf_align = 8;
info->pixmap.flags = FB_PIXMAP_SYSTEM;
if (intelfb_init_var(dinfo))
return 1;
info->pixmap.scan_align = 1;
update_dinfo(dinfo, &info->var);
return 0;
}
/* Update dinfo to match the active video mode. */
static void
update_dinfo(struct intelfb_info *dinfo, struct fb_var_screeninfo *var)
{
DBG_MSG("update_dinfo\n");
dinfo->bpp = var->bits_per_pixel;
dinfo->depth = intelfb_var_to_depth(var);
dinfo->xres = var->xres;
dinfo->yres = var->xres;
dinfo->pixclock = var->pixclock;
intelfb_get_fix(&dinfo->info->fix, dinfo->info);
switch (dinfo->bpp) {
case 8:
dinfo->visual = FB_VISUAL_PSEUDOCOLOR;
dinfo->pitch = var->xres_virtual;
break;
case 16:
dinfo->visual = FB_VISUAL_TRUECOLOR;
dinfo->pitch = var->xres_virtual * 2;
break;
case 32:
dinfo->visual = FB_VISUAL_TRUECOLOR;
dinfo->pitch = var->xres_virtual * 4;
break;
}
/* Make sure the line length is a aligned correctly. */
dinfo->pitch = ROUND_UP_TO(dinfo->pitch, STRIDE_ALIGNMENT);
if (FIXED_MODE(dinfo))
dinfo->pitch = dinfo->initial_pitch;
dinfo->info->screen_base = (char __iomem *)dinfo->fb.virtual;
dinfo->info->fix.line_length = dinfo->pitch;
dinfo->info->fix.visual = dinfo->visual;
}
/* fbops functions */
static int
intelfb_get_fix(struct fb_fix_screeninfo *fix, struct fb_info *info)
{
struct intelfb_info *dinfo = GET_DINFO(info);
DBG_MSG("intelfb_get_fix\n");
memset(fix, 0, sizeof(*fix));
strcpy(fix->id, dinfo->name);
fix->smem_start = dinfo->fb.physical;
fix->smem_len = dinfo->fb.size;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->type_aux = 0;
fix->visual = dinfo->visual;
fix->xpanstep = 8;
fix->ypanstep = 1;
fix->ywrapstep = 0;
fix->line_length = dinfo->pitch;
fix->mmio_start = dinfo->mmio_base_phys;
fix->mmio_len = INTEL_REG_SIZE;
fix->accel = FB_ACCEL_I830;
return 0;
}
/***************************************************************
* fbdev interface *
***************************************************************/
static int
intelfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
int change_var = 0;
struct fb_var_screeninfo v;
struct intelfb_info *dinfo;
static int first = 1;
DBG_MSG("intelfb_check_var: accel_flags is %d\n", var->accel_flags);
dinfo = GET_DINFO(info);
if (intelfbhw_validate_mode(dinfo, var) != 0)
return -EINVAL;
v = *var;
/* Check for a supported bpp. */
if (v.bits_per_pixel <= 8) {
v.bits_per_pixel = 8;
} else if (v.bits_per_pixel <= 16) {
if (v.bits_per_pixel == 16)
v.green.length = 6;
v.bits_per_pixel = 16;
} else if (v.bits_per_pixel <= 32) {
v.bits_per_pixel = 32;
} else
return -EINVAL;
change_var = ((info->var.xres != var->xres) ||
(info->var.yres != var->yres) ||
(info->var.xres_virtual != var->xres_virtual) ||
(info->var.yres_virtual != var->yres_virtual) ||
(info->var.bits_per_pixel != var->bits_per_pixel) ||
memcmp(&info->var.red, &var->red, sizeof(var->red)) ||
memcmp(&info->var.green, &var->green,
sizeof(var->green)) ||
memcmp(&info->var.blue, &var->blue, sizeof(var->blue)));
if (FIXED_MODE(dinfo) &&
(change_var ||
var->yres_virtual > dinfo->initial_var.yres_virtual ||
var->yres_virtual < dinfo->initial_var.yres ||
var->xoffset || var->nonstd)) {
if (first) {
ERR_MSG("Changing the video mode is not supported.\n");
first = 0;
}
return -EINVAL;
}
switch (intelfb_var_to_depth(&v)) {
case 8:
v.red.offset = v.green.offset = v.blue.offset = 0;
v.red.length = v.green.length = v.blue.length = 8;
v.transp.offset = v.transp.length = 0;
break;
case 15:
v.red.offset = 10;
v.green.offset = 5;
v.blue.offset = 0;
v.red.length = v.green.length = v.blue.length = 5;
v.transp.offset = v.transp.length = 0;
break;
case 16:
v.red.offset = 11;
v.green.offset = 5;
v.blue.offset = 0;
v.red.length = 5;
v.green.length = 6;
v.blue.length = 5;
v.transp.offset = v.transp.length = 0;
break;
case 24:
v.red.offset = 16;
v.green.offset = 8;
v.blue.offset = 0;
v.red.length = v.green.length = v.blue.length = 8;
v.transp.offset = v.transp.length = 0;
break;
case 32:
v.red.offset = 16;
v.green.offset = 8;
v.blue.offset = 0;
v.red.length = v.green.length = v.blue.length = 8;
v.transp.offset = 24;
v.transp.length = 8;
break;
}
if (v.xoffset < 0)
v.xoffset = 0;
if (v.yoffset < 0)
v.yoffset = 0;
if (v.xoffset > v.xres_virtual - v.xres)
v.xoffset = v.xres_virtual - v.xres;
if (v.yoffset > v.yres_virtual - v.yres)
v.yoffset = v.yres_virtual - v.yres;
v.red.msb_right = v.green.msb_right = v.blue.msb_right =
v.transp.msb_right = 0;
*var = v;
return 0;
}
static int
intelfb_set_par(struct fb_info *info)
{
struct intelfb_hwstate *hw;
struct intelfb_info *dinfo = GET_DINFO(info);
if (FIXED_MODE(dinfo)) {
ERR_MSG("Changing the video mode is not supported.\n");
return -EINVAL;
}
hw = kmalloc(sizeof(*hw), GFP_ATOMIC);
if (!hw)
return -ENOMEM;
DBG_MSG("intelfb_set_par (%dx%d-%d)\n", info->var.xres,
info->var.yres, info->var.bits_per_pixel);
intelfb_blank(FB_BLANK_POWERDOWN, info);
if (dinfo->accel)
intelfbhw_2d_stop(dinfo);
memcpy(hw, &dinfo->save_state, sizeof(*hw));
if (intelfbhw_mode_to_hw(dinfo, hw, &info->var))
goto invalid_mode;
if (intelfbhw_program_mode(dinfo, hw, 0))
goto invalid_mode;
#if REGDUMP > 0
intelfbhw_read_hw_state(dinfo, hw, 0);
intelfbhw_print_hw_state(dinfo, hw);
#endif
update_dinfo(dinfo, &info->var);
if (dinfo->accel)
intelfbhw_2d_start(dinfo);
intelfb_pan_display(&info->var, info);
intelfb_blank(FB_BLANK_UNBLANK, info);
if (ACCEL(dinfo, info)) {
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN |
FBINFO_HWACCEL_COPYAREA | FBINFO_HWACCEL_FILLRECT |
FBINFO_HWACCEL_IMAGEBLIT;
} else {
info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
}
kfree(hw);
return 0;
invalid_mode:
kfree(hw);
return -EINVAL;
}
static int
intelfb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info)
{
struct intelfb_info *dinfo = GET_DINFO(info);
#if VERBOSE > 0
DBG_MSG("intelfb_setcolreg: regno %d, depth %d\n", regno, dinfo->depth);
#endif
if (regno > 255)
return 1;
switch (dinfo->depth) {
case 8:
{
red >>= 8;
green >>= 8;
blue >>= 8;
dinfo->palette[regno].red = red;
dinfo->palette[regno].green = green;
dinfo->palette[regno].blue = blue;
intelfbhw_setcolreg(dinfo, regno, red, green, blue,
transp);
}
break;
case 15:
dinfo->pseudo_palette[regno] = ((red & 0xf800) >> 1) |
((green & 0xf800) >> 6) |
((blue & 0xf800) >> 11);
break;
case 16:
dinfo->pseudo_palette[regno] = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
break;
case 24:
dinfo->pseudo_palette[regno] = ((red & 0xff00) << 8) |
(green & 0xff00) |
((blue & 0xff00) >> 8);
break;
}
return 0;
}
static int
intelfb_blank(int blank, struct fb_info *info)
{
intelfbhw_do_blank(blank, info);
return 0;
}
static int
intelfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
{
intelfbhw_pan_display(var, info);
return 0;
}
/* When/if we have our own ioctls. */
static int
intelfb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg, struct fb_info *info)
{
int retval = 0;
return retval;
}
static void
intelfb_fillrect (struct fb_info *info, const struct fb_fillrect *rect)
{
struct intelfb_info *dinfo = GET_DINFO(info);
u32 rop, color;
#if VERBOSE > 0
DBG_MSG("intelfb_fillrect\n");
#endif
if (!ACCEL(dinfo, info) || dinfo->depth == 4)
return cfb_fillrect(info, rect);
if (rect->rop == ROP_COPY)
rop = PAT_ROP_GXCOPY;
else // ROP_XOR
rop = PAT_ROP_GXXOR;
if (dinfo->depth != 8)
color = dinfo->pseudo_palette[rect->color];
else
color = rect->color;
intelfbhw_do_fillrect(dinfo, rect->dx, rect->dy,
rect->width, rect->height, color,
dinfo->pitch, info->var.bits_per_pixel,
rop);
}
static void
intelfb_copyarea(struct fb_info *info, const struct fb_copyarea *region)
{
struct intelfb_info *dinfo = GET_DINFO(info);
#if VERBOSE > 0
DBG_MSG("intelfb_copyarea\n");
#endif
if (!ACCEL(dinfo, info) || dinfo->depth == 4)
return cfb_copyarea(info, region);
intelfbhw_do_bitblt(dinfo, region->sx, region->sy, region->dx,
region->dy, region->width, region->height,
dinfo->pitch, info->var.bits_per_pixel);
}
static void
intelfb_imageblit(struct fb_info *info, const struct fb_image *image)
{
struct intelfb_info *dinfo = GET_DINFO(info);
u32 fgcolor, bgcolor;
#if VERBOSE > 0
DBG_MSG("intelfb_imageblit\n");
#endif
if (!ACCEL(dinfo, info) || dinfo->depth == 4
|| image->depth != 1)
return cfb_imageblit(info, image);
if (dinfo->depth != 8) {
fgcolor = dinfo->pseudo_palette[image->fg_color];
bgcolor = dinfo->pseudo_palette[image->bg_color];
} else {
fgcolor = image->fg_color;
bgcolor = image->bg_color;
}
if (!intelfbhw_do_drawglyph(dinfo, fgcolor, bgcolor, image->width,
image->height, image->data,
image->dx, image->dy,
dinfo->pitch, info->var.bits_per_pixel))
return cfb_imageblit(info, image);
}
static int
intelfb_cursor(struct fb_info *info, struct fb_cursor *cursor)
{
struct intelfb_info *dinfo = GET_DINFO(info);
#if VERBOSE > 0
DBG_MSG("intelfb_cursor\n");
#endif
if (!dinfo->hwcursor)
return soft_cursor(info, cursor);
intelfbhw_cursor_hide(dinfo);
/* If XFree killed the cursor - restore it */
if (INREG(CURSOR_A_BASEADDR) != dinfo->cursor.offset << 12) {
u32 fg, bg;
DBG_MSG("the cursor was killed - restore it !!\n");
DBG_MSG("size %d, %d pos %d, %d\n",
cursor->image.width, cursor->image.height,
cursor->image.dx, cursor->image.dy);
intelfbhw_cursor_init(dinfo);
intelfbhw_cursor_reset(dinfo);
intelfbhw_cursor_setpos(dinfo, cursor->image.dx,
cursor->image.dy);
if (dinfo->depth != 8) {
fg =dinfo->pseudo_palette[cursor->image.fg_color];
bg =dinfo->pseudo_palette[cursor->image.bg_color];
} else {
fg = cursor->image.fg_color;
bg = cursor->image.bg_color;
}
intelfbhw_cursor_setcolor(dinfo, bg, fg);
intelfbhw_cursor_load(dinfo, cursor->image.width,
cursor->image.height,
dinfo->cursor_src);
if (cursor->enable)
intelfbhw_cursor_show(dinfo);
return 0;
}
if (cursor->set & FB_CUR_SETPOS) {
u32 dx, dy;
dx = cursor->image.dx - info->var.xoffset;
dy = cursor->image.dy - info->var.yoffset;
intelfbhw_cursor_setpos(dinfo, dx, dy);
}
if (cursor->set & FB_CUR_SETSIZE) {
if (cursor->image.width > 64 || cursor->image.height > 64)
return -ENXIO;
intelfbhw_cursor_reset(dinfo);
}
if (cursor->set & FB_CUR_SETCMAP) {
u32 fg, bg;
if (dinfo->depth != 8) {
fg = dinfo->pseudo_palette[cursor->image.fg_color];
bg = dinfo->pseudo_palette[cursor->image.bg_color];
} else {
fg = cursor->image.fg_color;
bg = cursor->image.bg_color;
}
intelfbhw_cursor_setcolor(dinfo, bg, fg);
}
if (cursor->set & (FB_CUR_SETSHAPE | FB_CUR_SETIMAGE)) {
u32 s_pitch = (ROUND_UP_TO(cursor->image.width, 8) / 8);
u32 size = s_pitch * cursor->image.height;
u8 *dat = (u8 *) cursor->image.data;
u8 *msk = (u8 *) cursor->mask;
u8 src[64];
u32 i;
if (cursor->image.depth != 1)
return -ENXIO;
switch (cursor->rop) {
case ROP_XOR:
for (i = 0; i < size; i++)
src[i] = dat[i] ^ msk[i];
break;
case ROP_COPY:
default:
for (i = 0; i < size; i++)
src[i] = dat[i] & msk[i];
break;
}
/* save the bitmap to restore it when XFree will
make the cursor dirty */
memcpy(dinfo->cursor_src, src, size);
intelfbhw_cursor_load(dinfo, cursor->image.width,
cursor->image.height, src);
}
if (cursor->enable)
intelfbhw_cursor_show(dinfo);
return 0;
}
static int
intelfb_sync(struct fb_info *info)
{
struct intelfb_info *dinfo = GET_DINFO(info);
#if VERBOSE > 0
DBG_MSG("intelfb_sync\n");
#endif
if (dinfo->ring_lockup)
return 0;
intelfbhw_do_sync(dinfo);
return 0;
}