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2007-05-08hecubafb: use fb_sys_read()Antonino A. Daplas
Since hecubafb's framebuffer is vmalloc'ed, use fb_sys_read(). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08arcfb: use fb_sys_read()Antonino A. Daplas
Since arcfb's framebuffer is vmalloc'ed, use the fb_sys_read(). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: add fb_read/fb_write functions for framebuffers in system RAMAntonino A. Daplas
The functions fb_read() and fb_write in fbmem.c assume that the framebuffer is in IO memory. However, we have 3 drivers (hecubafb, arcfb, and vfb) where the framebuffer is allocated from system RAM (via vmalloc). Using __raw_read/__raw_write (fb_readl/fb_writel) for these drivers is illegal, especially in other platforms. Create file read and write methods for these types of drivers. These are named fb_sys_read() and fb_sys_write(). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: pass struct fb_info to fb_read and fb_writeAntonino A. Daplas
It is unnecessary to pass struct file to fb_read() and fb_write() in struct fb_ops. For consistency with the other methods, pass struct fb_info instead. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08vfb: use sys instead of cfb drawing functionsAntonino A. Daplas
Since vfb's framebuffer is vmalloc'ed, use the sys_* drawing functions instead of cfb_*. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08hecubafb: use sys instead of cfb drawing functionsAntonino A. Daplas
Since hecubafb's framebuffer is vmalloc'ed, use the sys_* drawing functions instead of cfb_*. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08arcfb: use sys instead of cfb drawing functionsAntonino A. Daplas
Since arcfb's framebuffer is vmalloc'ed, use the sys_* drawing functions instead of cfb_*. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: add drawing functions for framebuffers in system RAMAntonino A. Daplas
The generic drawing functions (cfbimgblt, cfbcopyarea, cfbfillrect) assume that the framebuffer is in IO memory. However, we have 3 drivers (hecubafb, arcfb, and vfb) where the framebuffer is allocated from system RAM (via vmalloc). Using _raw_read/write and family for these drivers (as used in the cfb* functions) is illegal, especially in other platforms. Create 3 new drawing functions, based almost entirely from the original except that the framebuffer memory is assumed to be in system RAM. These are named as sysimgblt, syscopyarea, and sysfillrect. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08skeletonfb: documentation error fixesAntonino A. Daplas
Documentation error fixes. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08i810fb: fix incorrect frequency maskAntonino A. Daplas
Fix a long-standing bug. The mask used to detect a 100Mhz or 133Mhz chipset is incorrect. (The only side effect of this bug is that it will choose an incorrect watermark). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08hecubafb: kill sparse warningsAntonino A. Daplas
The framebuffer memory is allocated from system RAM (vmalloc'ed). Add __force annotations. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08s3fb: add sparse annotationsAntonino A. Daplas
Add sparse annotations and use fb_read/fb_write and family to access the framebuffer. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08arcfb: kill sparse warningAntonino A. Daplas
The framebuffer memory is allocated from system RAM (vmalloc'ed). Add __force annotations. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: add sparse annotations in svgalib.cAntonino A. Daplas
Add sparse annotations and use fb_read/fb_write family to access the framebuffer. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: kill sparse warning in deferred IOAntonino A. Daplas
Kill the following in fb_defio.c: drivers/video/fb_defio.c:40:43: warning: incorrect type in argument 1 (different address spaces) drivers/video/fb_defio.c:40:43: expected void *addr drivers/video/fb_defio.c:40:43: got char [noderef] *screen_base<asn:2> The framebuffer memory of these types of devices are allocated from system RAM. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08rivafb: fix IO accessAntonino A. Daplas
Fix IO access, with the following sparse warnings: drivers/video/riva/fbdev.c:320:25: warning: dereference of noderef expression drivers/video/riva/fbdev.c:321:29: warning: dereference of noderef expression drivers/video/riva/fbdev.c:327:18: warning: dereference of noderef expression drivers/video/riva/fbdev.c:328:15: warning: dereference of noderef expression Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08nvidiafb: fix sparse warningAntonino A. Daplas
Fix the following sparse warning: drivers/video/nvidia/nv_setup.c:659:20: warning: dereference of noderef expression Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbcon: delay screen update when setting the mode of all consolesAntonino A. Daplas
If the current framebuffer console is rotated (rotate != 0), doing an "fbset -a" will corrupt the current console. Fix by updating the current console only after all non-visible consoles have been updated. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: link vgastate.o using KconfigAntonino A. Daplas
Instead of directly linking vgastate.o by individual drivers, create a Kconfig option VGASTATE which can be 'SELECT'ed by individual drivers instead. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08savagefb: VGA state save and restoreAntonino A. Daplas
Allow the saving and restoration of VGA text mode. The state is saved on the first open and restored on the last close. Because of the VGA registers are linearly mapped to the MMIO space, MMIO access is used which is not limited to X86 platforms nor to the primary display device. An echo 0 > /sys/class/vtconsole/vtcon1/bind will convert the display from graphics to text mode. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08savagefb: rework i2c bit accessAntonino A. Daplas
Use already defined VGAwCR/VGArCR functions to access the i2c bus. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08nvidiafb: VGA state save and restoreAntonino A. Daplas
Allow the saving and restoration of VGA text mode. The state is saved on the first open and restored on the last close. Because of the non-linear mapping of the VGA registers to the MMIO space, this will be done only on X86 platforms where the device is the primary display. An echo 0 > /sys/class/vtconsole/vtcon1/bind will convert the display from graphics to text mode. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08epson1355fb.c: fix error handling codeRoland Stigge
Fix error handling code Signed-off-by: Roland Stigge <stigge@antcom.de> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08cirrusfb: convert to generic booleanRichard Knutsson
Convert to generic boolean. Signed-off-by: Richard Knutsson <ricknu-0@student.ltu.se> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08VIDEO: add spaces on either side of the case "..." operatorRobert P. J. Day
Following the programming advice laid down in the gcc manual, make sure the case "..." operator has spaces on either side. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08skeletonfb: various correctionsKrzysztof Helt
This is mainly correction of types, typos and missing characters in the skeletonfb.c file found while trying to prepare a new fb driver. [adaplas] Additions on power management and fixes as per akpm Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08nvidiafb: access CRT registers safelyAntonino A. Daplas
Use Read/WriteCrtc() to access CRTC registers in nv_i2c.c. These are safer because it uses the correct CRTC base (0x3bx or 0x3dx). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08nvidiafb: ensure that CRTC registers are accessibleAntonino A. Daplas
- Ensure that CRTC registers are accessible by unlocking them on set_par(), otherwise i2c reading will fail. - The function nvidia_vga_protect(), does not protect the VGA registers, but turns off the screen. Rename it to nvidia_screen_off(). Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08rivafb: fixed reversed DDC portsAntonino A. Daplas
Fixed reversed DDC port so assignments are congruent with nvidiafb's and X's nv driver. Signed-off-by: Antonino Daplas <adaplas@pol.net> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08rivafb/nvidiafb: Various cleanupsJean Delvare
Various cleanups to rivafb/nvidiafb's I2C code: * Drop useless par->bus. * Refactor I2C bus deletion code. * Drop useless variable initialization. * Remove unneeded include of <linux/i2c-id.h>. * Simplify +1/-1. * Add __devinit tags where possible. [adaplas] The varible initialization are not useless. However, rivafb must check if i2c bus are created properly before reading the EDID block. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08rivafb: handle I2C bus creation failureJean Delvare
I2C bus creation may fail, let rivafb handle that case properly. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08rivafb/nvidiafb: Enable hardware monitoringJean Delvare
Let the hardware monitoring drivers probe the second rivafb/nvidiafb I2C bus for devices. Signed-off-by: Jean Delvare <khali@linux-fr> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: don't show logo if driver or fbcon are modularAntonino A. Daplas
It was always intended for the logo to be drawn only if both fbcon and the driver that is mapped to it are both compiled statically. Currently, if fbcon is loaded prior to the driver, the logo is not shown. Reverse the order, and the code may attempt to draw the logo which is __initdata. By accident, this bug is rarely seen because this method of loading the modules is not common and secondly, a code in fb_prepare_logo() that checks the height of the logo (now a random value) rarely succeeds. Fix by drawing the logo only if both fbcon and the driver are statically compiled. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08s3fb: fix PCI must_checksRandy Dunlap
drivers/video/s3fb.c:1078: warning: ignoring return value of 'pci_enable_device', declared with attribute warn_unused_result Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbcon: don't draw cursor when it's disabledMichal Januszewski
When the cursor and echo are disabled on the current console, pressing a key will cause a black rectangle to be painted in the cursor's position. Fix this by not touching the framebuffer in fbcon_cursor() when the cursor is off. Signed-off-by: Michal Januszewski <spock@gentoo.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08vt-add-color-support-to-the-underline-and-italic-attributes-fixAndrew Morton
Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08vt: add color support to the "underline" and "italic" attributesJan Engelhardt
Add color support to the "underline" and "italic" attributes as in OpenBSD/NetBSD-style (vt220) and xterm. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Acked-by: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08nvidiafb: Fix reversed DDC portPetr Vandrovec
After I added some debugging printks I've found that code became a bit confused because it believed that primary monitor is 1920x540, but later it found in CRTC0's registers that panel size is 1920x1200 (Windows also agree that 1920x1200 is primary monitor, and 1920x1080i secondary one). When I applied attached patch then my monitor became as happy as it was before I connected HDMI cable to secondary output. Signed-off-by: Petr Vandrovec <vandrove@vc.cvut.cz> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Cc: Dave Airlie <airlied@linux.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08radeonfb: Add support for Radeon xpress 200mjohan henriksson
Added support for radeon xpress 200m(rs480). Note that the card doesn't like dynclk turned on. Signed-off-by: Johan Henriksson <jhn98032@gmail.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: correct image offsets when rotating logoGeert Uytterhoeven
Correct the image offsets when rotating the logo. Before image->dx and image->dy were always zero, so nobody ever noticed. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-By: James Simmons <jsimmons@infradead.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: fb_do_show_logo() updatesGeert Uytterhoeven
fb_do_show_logo() updates: - Use width and height of the passed image instead of the global variable fb_logo - Explicitly pass the number of logos to draw Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-By: James Simmons <jsimmons@infradead.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: avoid vertical overflow when making space for the logoGeert Uytterhoeven
fbcon_prepare_logo(): Avoid vertical overflow when making space for the logo Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-By: James Simmons <jsimmons@infradead.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08remove unused header file: drivers/video/riva/nv4ref.hRobert P. J. Day
Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08tgafb accelerated codeJames Simmons
Add accelerated panning and accelerated color and mono image drawing. Please apply. Signed-off-by: James Simmons <jsimmons@infradead.org> Acked-by: Maciej W. Rozycki <macro@linux-mips.org> (tested, too!) Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08tgafb: TURBOchannel supportMaciej W. Rozycki
This is support for the TC variations of the TGA boards (properly known as SFB+ or Smart Frame Buffer Plus boards). The 8-plane SFB+ board uses the Bt459 RAMDAC (unlike its PCI TGA counterpart, which uses the Bt485), so bits have been added to support this chip as well. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: James Simmons <jsimmons@infradead.org> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08drivers/video/hecubafb.c: make 4 functions staticAdrian Bunk
This patch makes the following needlessly global functions static: - hcb_wait_for_ack() - hcb_wait_for_ack_clear() - apollo_send_data() - apollo_send_command() Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Jaya Kumar <jayakumar.lkml@gmail.com> Cc: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: hecuba Framebuffer DriverJaya Kumar
This patch implements support for the E-Ink/hecuba display device. It uses deferred IO support. [akpm@linux-foundation.org: linker section fixes] Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fb: fsync() method for deferred I/O flush.Paul Mundt
There are cases when we do not want to wait on the delay for automatically updating the "real" framebuffer, this implements a simple ->fsync() hook for explicitly flushing the deferred I/O work. The ->page_mkwrite() handler will rearm the work queue normally. (akpm: nuke unneeded ifdefs, forward-delcare struct dentry) Signed-off-by: Paul Mundt <lethal@linux-sh.org> Cc: Jaya Kumar <jayakumar.lkml@gmail.com> Acked-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08make fb_deferred_io_mkwrite() staticAdrian Bunk
Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Jaya Kumar <jayakumar.lkml@gmail.com> Cc: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08fbdev: mm: Deferred IO supportJaya Kumar
This implements deferred IO support in fbdev. Deferred IO is a way to delay and repurpose IO. This implementation is done using mm's page_mkwrite and page_mkclean hooks in order to detect, delay and then rewrite IO. This functionality is used by hecubafb. [adaplas] This is useful for graphics hardware with no directly addressable/mappable framebuffer. Implementing this will allow the "framebuffer" to be accesible from user space via mmap(). Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>