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linux/drivers/video
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Luis R. Rodriguez 1e43a20396 video: fbdev: atmel_lcdfb: use ioremap_wc() for framebuffer 
The driver doesn't use mtrr_add() or arch_phys_wc_add() but
since we know the framebuffer is isolated already on an
ioremap() we can take advantage of write combining for
performance where possible.

In this case there are a few motivations for this:

a) Take advantage of PAT when available

b) Help with the goal of eventually using _PAGE_CACHE_UC over
   _PAGE_CACHE_UC_MINUS on x86 on ioremap_nocache() (see commit
   de33c442e titled "x86 PAT: fix performance drop for glx,
   use UC minus for ioremap(), ioremap_nocache() and
   pci_mmap_page_range()")

Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Antonino Daplas <adaplas@gmail.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: linux-fbdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
2015-06-03 12:41:53 +03:00
..
backlight == Changes to existing drivers == 2015-04-14 17:54:22 -07:00
console video/console: use swap() in newport_bmove() 2015-05-27 12:54:49 +03:00
fbdev video: fbdev: atmel_lcdfb: use ioremap_wc() for framebuffer 2015-06-03 12:41:53 +03:00
logo video/logo: prevent use of logos after they have been freed 2014-12-29 10:06:55 +02:00
display_timing.c
hdmi.c [media] hdmi: rename HDMI_AUDIO_CODING_TYPE_EXT_STREAM to _EXT_CT 2015-01-27 10:19:12 -02:00
Kconfig gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging 2014-06-04 11:06:52 +02:00
Makefile
of_display_timing.c fbdev changes for 3.18 2014-10-18 18:03:02 -07:00
of_videomode.c
vgastate.c fbdev: vgastate: remove trailing whitespaces 2015-01-13 12:53:25 +02:00
videomode.c