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path: root/drivers/video/ps3fb.c
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* powerpc/ps3: Add a sub-match id to ps3_system_busMasakazu Mokuno2008-07-21
| | | | | | | | | Add sub match id for ps3 system bus so that two different system bus devices can be connected to a shared device. Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* ps3fb: fix modedb typosGeoff Levand2008-02-06
| | | | | | | | | | Fix modedb typos Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: cleanup sweepGeert Uytterhoeven2008-02-06
| | | | | | | | | | | | | | cleanup sweep: - Kill ps3fb_priv.xdr_ea and ps3fb_priv.xdr_size, use info->screen_base and info->fix.smem_len instead. - Kill superfluous assignments to info->fix.smem_start, info->fix.smem_len, and info->screen_base in ps3fb_set_par(). Their values never change. - Add sparse annotations to casts to kill address space warnings Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: round up video modesGeert Uytterhoeven2008-02-06
| | | | | | | | | Round up arbitrary video modes until they fit (if possible) Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: reorganize modedb handlingGeert Uytterhoeven2008-02-06
| | | | | | | | | | | | | | Reorganize modedb handling: - Reorder the video modes in ps3fb_modedb, for easier indexing using PS3AV_MODE_* numbers, - Introduce ps3fb_native_vmode(), to convert from native (PS3AV_MODE_*) mode numbers to struct fb_videomode *, - Rename and move ps3fb_default_mode() to ps3fb_vmode(). Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: add support for configurable black bordersGeert Uytterhoeven2008-02-06
| | | | | | | | | | Allow all video modes where the visible resolution plus the black borders matches a native resolution Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: make frame buffer offsets unsigned intGeert Uytterhoeven2008-02-06
| | | | | | | | | | Frame buffer offsets don't have to be `unsigned long', `unsigned int' is sufficient Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: kill ps3fb_resGeert Uytterhoeven2008-02-06
| | | | | | | | | | kill ps3fb_res[], as all information it contains can be obtained in some other way. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: open-code macros that are used only onceGeert Uytterhoeven2008-02-06
| | | | | | | | | | Open-code the X_OFF(), Y_OFF(), WIDTH(), HEIGHT(), and VP_OFF() macros, as they're used in one place only Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: kill PS3FB_FULL_MODE_BITGeert Uytterhoeven2008-02-06
| | | | | | | | | Kill PS3FB_FULL_MODE_BIT, use PS3AV_MODE_FULL instead Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3: use symbolic names for video modesGeert Uytterhoeven2008-02-06
| | | | | | | | | Use symbolic names for video modes Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: fix deadlock on kexec()Jeremy Kerr2008-01-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since the introduction of the acquire_console_sem calls in 0333d83509c7d8496c8965b5ba9bc0c98e83c259, kexecing can cause the kernel to deadlock: ps3fb_shutdown() -> unregister_framebuffer() -> fb_notifier_call_chain(FB_EVENT_FB_UNBIND) -> fbcon_fb_unbind() -> unbind_con_driver() -> bind_con_driver() [ acquires console_sem ] -> fbcon_deinit() -> fbops->fb_release(newinfo, 0) -> ps3fb_release() -> ps3fb_sync() [ acquires console_sem ] This change avoids the deadlock by moving the acquire_console_sem() out of ps3fb_sync(), and puts it into the two other callsites, leaving ps3fb_release() to call ps3fb_sync() without the console semaphore. [Geert] - Corrected call sequence above - ps3fb_release() may be called with and without console_sem held. This is an inconsistency that should be fixed at the fb level, but for now, try to acquire console_sem in ps3fb_release(). I think it's safer to let ps3fb_release() try to acquire console_sem and not refresh the screen if it fails, than to call ps3fb_sync() without holding console_sem, as ps3fb_par may be modified at the same time, causing crashes or lockups. Besides, ps3fb_release() only calls ps3fb_sync() to refresh the screen when display flipping is disabled, which is an uncommon case (except during shutdown/kexec). Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: prevent use after free of fb_infoJeremy Kerr2008-01-11
| | | | | | | | | | | | In ps3fb_shutdown, freeing the framebuffer will cause fb_info (in dev->core.driver_data) to be free()ed, which we potentially access from the ps3fbd kthread. This change frees the framebuffer after stopping the ps3fbd kthread. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: Fix ps3fb free_irq() dev_idGeoff Levand2007-12-19
| | | | | | | | | | | | | The dev_id arg passed to free_irq() must match that passed to request_irq(). Fixes this PS3 error message: Trying to free already-free IRQ 44 Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: Update for firmware 2.10Geert Uytterhoeven2007-12-19
| | | | | | | | | | | | | ps3fb: Update for firmware 2.10 As of PS3 firmware version 2.10, the GPU command buffer size must be at least 2 MiB large. Since we use only a small part of the GPU command buffer and don't want to waste precious XDR memory, move the GPU command buffer back to the start of the XDR memory reserved for ps3fb and let the unused part overlap with the actual frame buffer. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: video memory size cleanupsGeert Uytterhoeven2007-11-29
| | | | | | | | | - Limit video memory size to avoid crossing a 256 MiB boundary in IOIF space. - Pass the actual amount of video memory used to lv1_gpu_memory_allocate(). Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* drivers/video/ps3fb: fix memset size errorLi Zefan2007-11-14
| | | | | | | | | | The size passed to memset is wrong. Signed-off-by Li Zefan <lizf@cn.fujitsu.com> Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: enhance horizontal panning on firmware 1.90 and upGeert Uytterhoeven2007-10-16
| | | | | | | | | | | | | | | | | ps3fb: Enhance horizontal panning on firmware 1.90 and up: - On firmware 1.90 and up, L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT supports copying rectangles from XDR to DDR memory with different source and destination line lengths. Hence larger horizontal virtual resolutions can be supported (up to 16368 pixels). - As the actual frame buffer memory layout no longer matches the entries in ps3fb_res[], create fake struct ps3fb_ioctl_res data for the PS3FB_IOCTL_SCREENINFO ioctl, so user space applications that depend on it keep on working. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: add virtual screen and panning supportGeert Uytterhoeven2007-10-16
| | | | | | | | | | | | | | | | ps3fb: Add virtual screen and panning support: - The vertical virtual screen size is limited by the amount of memory reserved for ps3fb, - The horizontal virtual screen size is limited to the fullscreen width, - Advertise that we support panning, so fbcon will use it if the virtual screen is enabled. Enabling a virtual screen (using `fbset -vyres nnn') can speed up text console scrolling by a factor of 10-15, depending on the video mode. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: don't keep the borders for non-fullscreen modes in XDR memoryGeert Uytterhoeven2007-10-16
| | | | | | | | | | | | | | | Don't keep the borders for non-fullscreen modes in XDR memory: - Extract ps3fb_sync_image() - Work around the alignment restrictions of L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT by using an offset with L1GPU_CONTEXT_ATTRIBUTE_DISPLAY_FLIP - Only copy the visible part of the screen on every vblank - Always put the real frame buffer at the start of video memory - Clear fullscreen DDR memory on mode change Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: use fb_info.par properlyGeert Uytterhoeven2007-10-16
| | | | | | | | | | | | | | | ps3fb: Use fb_info.par properly: o Move mode-specific fields into struct ps3fb_par o Allocate struct ps3fb_par using framebuffer_alloc() o Protect access to ps3fb_par in ps3fb_sync() using the console semaphore (this semaphore is already held when ps3fb_set_par() is called) o Avoid calling ps3av_set_video_mode() if the actual video mode hasn't changed Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: fix possible overlap of GPU command buffer and frame bufferGeert Uytterhoeven2007-10-16
| | | | | | | | | | | | | | | | | | | ps3fb: In the case of non-fullscreen video modes, there was a partial overlap of the GPU command buffer and the frame buffer. Fix and cleanup various issues with overlap and alignment: - Move the GPU command buffer from the beginning to the end of video memory - Exclude the GPU command buffer from the actual frame buffer memory - Align the start of the virtual frame buffer to PAGE_SIZE instead of to 64 KiB, and don't waste memory if it's already aligned (for fullscreen modes) - Take into account the alignment when checking memory requirements and maximum number of frames - Make sure fb_fix_screeninfo.smem_start always points to the virtual frame buffer start, so we don't have to compensate for that in ps3fb_mmap() Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: make ps3fb_wait_for_vsync() and ps3fb_flip_ctl() staticGeert Uytterhoeven2007-10-16
| | | | | | | | | | Make ps3fb_wait_for_vsync() and ps3fb_flip_ctl() static, as they're no (longer) used outside ps3fb. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: clean up includesGeert Uytterhoeven2007-10-16
| | | | | | | | | Clean up includes Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: do not print warnings on invalid frame numbersGeert Uytterhoeven2007-10-16
| | | | | | | | | | Do not print warnings on invalid frame numbers, as this can be triggered from user space. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: convert from printk()/DPRINTK() to dev_*()/pr_*()Geert Uytterhoeven2007-10-16
| | | | | | | | | Convert ps3fb from printk()/DPRINTK() to dev_*()/pr_*() Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3av: dont distinguish between `boot' and `non-boot' autodetectionGeert Uytterhoeven2007-10-16
| | | | | | | | | | don't distinguish between `boot' and `non-boot' autodetection now the autodetection code has been improved Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* ps3fb: Fix spurious mode change failuresGeert Uytterhoeven2007-10-16
| | | | | | | | | | | | | | | | ps3fb: Add a `mode' parameter to ps3fb_get_res_table(), as in some cases it should check the full-screen flag of the _new_ video mode instead of the current video mode. This bug caused spurious mode change failures when switching between fullscreen and non-fullscreen modes using fbset, while ps3-video-mode worked fine. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> CC: Geoff Levand <geoffrey.levand@am.sony.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>
* fbdev: change asm/uaccess.h to linux/uaccess.hKrzysztof Helt2007-10-16
| | | | | | | | | | | This patch replaces <asm/uaccess.h> with <linux/uaccess.h> after the checkpatch.pl hint. The include of <asm/uaccess.h> is removed if the driver does not use it. 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>
* ps3fb: Set FBINFO_READS_FAST to speed up text console scrollingGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | ps3fb: Set FBINFO_READS_FAST to speed up text console scrolling (on average 50%, according to my tests) Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Paul Mackerras <paulus@samba.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>
* Freezer: make kernel threads nonfreezable by defaultRafael J. Wysocki2007-07-17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, the freezer treats all tasks as freezable, except for the kernel threads that explicitly set the PF_NOFREEZE flag for themselves. This approach is problematic, since it requires every kernel thread to either set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't care for the freezing of tasks at all. It seems better to only require the kernel threads that want to or need to be frozen to use some freezer-related code and to remove any freezer-related code from the other (nonfreezable) kernel threads, which is done in this patch. The patch causes all kernel threads to be nonfreezable by default (ie. to have PF_NOFREEZE set by default) and introduces the set_freezable() function that should be called by the freezable kernel threads in order to unset PF_NOFREEZE. It also makes all of the currently freezable kernel threads call set_freezable(), so it shouldn't cause any (intentional) change of behaviour to appear. Additionally, it updates documentation to describe the freezing of tasks more accurately. [akpm@linux-foundation.org: build fixes] Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Cc: Pavel Machek <pavel@ucw.cz> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [POWERPC] PS3: Frame buffer system-bus reworkGeert Uytterhoeven2007-06-28
| | | | | | | | | | Convert the ps3fb device from a platform device to a PS3 system bus device. Fix the remove and shutdown methods to support kexec and to make ps3fb a loadable module. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* ps3fb: use FB_SYS_* instead of FB_CFB_*Geert Uytterhoeven2007-05-23
| | | | | | | | | | ps3fb: Use the FB_SYS_* operations instead of the FB_CFB_* operations as the actual frame buffer memory is part of system RAM Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.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>
* Merge branch 'linux-2.6'Paul Mackerras2007-05-07
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| * ps3fb: Use __func__ instead of __FUNCTION__Geert Uytterhoeven2007-05-04
| | | | | | | | | | | | | | ps3fb: Replace GNU extension `__FUNCTION__' by C99 `__func__' Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * ps3: Make `ps3videomode -v 0 (auto mode) work againMasashi Kimoto2007-05-04
| | | | | | | | | | | | | | ps3: Make `ps3videomode -v 0' (auto mode) work again Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * ps3fb: kill superfluous zero initializationsGeert Uytterhoeven2007-05-04
| | | | | | | | | | | | | | ps3fb: kill superfluous zero initializations Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * ps3fb: atomic fixesGeert Uytterhoeven2007-05-04
| | | | | | | | | | | | | | | | ps3fb: Use atomic_dec_if_positive() instead of bogus atomic_read()/atomic_dec() combinations Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * ps3fb: thread updatesGeert Uytterhoeven2007-05-04
| | | | | | | | | | | | | | | | ps3fb: Replace the kernel_thread and the semaphore by a proper kthread, which is simply woken up when the screen must be updated Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | [POWERPC] PS3: Interrupt routine fixups.Geoff Levand2007-05-02
|/ | | | | | | | Fixups for the ps3 interrupt routines to support all HV device in a generic way. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ps3: Virtual Frame Buffer DriverGeert Uytterhoeven2007-02-12
Add the PS3 Virtual Frame Buffer Driver. As the actual graphics hardware cannot be accessed directly by Linux, ps3fb uses a virtual frame buffer in main memory. The actual screen image is copied to graphics memory by the GPU on every vertical blank, by making a hypervisor call. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: James Simmons <jsimmons@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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