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Mikulas Patocka 19b9971997 udlfb: set optimal write delay 
commit bb24153a3f upstream.

The default delay 5 jiffies is too much when the kernel is compiled with
HZ=100 - it results in jumpy cursor in Xwindow.

In order to find out the optimal delay, I benchmarked the driver on
1280x720x30fps video. I found out that with HZ=1000, 10ms is acceptable,
but with HZ=250 or HZ=300, we need 4ms, so that the video is played
without any frame skips.

This patch changes the delay to this value.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-09-09 19:56:01 +02:00
..
atmel_lcdc.h video: atmel_lcdfb: pass the pdata as params 2013-09-27 09:26:20 +03:00
aty128.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
auo_k190xfb.h AUO-K190x: Add resolutions for portrait displays 2013-04-04 13:08:07 +03:00
broadsheetfb.h broadsheetfb: support storing waveform 2010-03-12 15:52:34 -08:00
cirrus.h cirrusfb: Laguna chipset 8bpp fix 2009-04-01 08:59:27 -07:00
cvisionppc.h
…
da8xx-fb.h video: da8xx-fb: improve readability of code 2013-08-09 14:02:42 +03:00
display_timing.h video: display_timing: Add flags to select the edge when the sync is driven 2016-11-02 10:48:18 +02:00
edid.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
exynos7_decon.h drm/exynos: Add DECON driver 2015-02-11 20:27:08 +09:00
exynos5433_decon.h drm/exynos/decon5433: simplify shadow protect code 2017-06-01 16:21:36 +09:00
gbe.h
…
hecubafb.h fbdev: platforming hecubafb and n411 2008-04-28 08:58:41 -07:00
iga.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ili9320.h fb: add support for the ILI9320 video display controller 2008-07-24 10:47:40 -07:00
imx-ipu-image-convert.h gpu: ipu-v3: Add queued image conversion support 2016-09-19 08:30:27 +02:00
imx-ipu-v3.h gpu: ipu-v3: Add support for double read/write reduction 2017-06-08 08:57:18 +02:00
kyro.h drivers/video/fbdev/kyrofb: Use arch_phys_wc_add() and pci_ioremap_wc_bar() 2015-08-25 09:59:44 +02:00
mach64.h atyfb: fix CONFIG_ namespace violations 2009-02-05 12:56:48 -08:00
maxinefb.h
…
mbxfb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
metronomefb.h [ARM] 5209/1: metronomefb: changes to use platform framebuffer 2008-08-26 17:01:12 +01:00
mipi_display.h drm: Add new DCS commands in the enum list 2016-03-31 08:00:06 +02:00
mmp_disp.h video: mmp: add pitch info in mmp_win structure 2013-09-20 12:52:33 +03:00
neomagic.h video: fbdev: neofb: use arch_phys_wc_add() and ioremap_wc() 2015-06-03 12:41:49 +03:00
newport.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
of_display_timing.h video: of: Constify node argument to display timing functions 2016-11-14 03:35:00 +02:00
of_videomode.h video: add of helper for display timings/videomode 2013-01-24 09:03:48 +01:00
omap-panel-data.h omapdss: omap-panel-data.h: Remove connector_type from atv pdata 2016-06-03 16:06:32 +03:00
omapfb_dss.h Merge omapdss header refactoring 2016-06-07 12:42:58 +03:00
omapvrfb.h OMAPDSS: VRFB: add omap_vrfb_supported() 2012-10-17 12:17:18 +03:00
permedia2.h pm2fb: hardware cursor support for the Permedia2 2007-10-16 09:43:18 -07:00
platform_lcd.h drivers/video/backlight/platform_lcd.c: introduce probe callback 2013-04-29 18:28:18 -07:00
pm3fb.h pm3fb: header file cleanup 2007-10-16 09:43:18 -07:00
pmag-ba-fb.h
…
pmagb-b-fb.h
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pxa168fb.h video: pxa168fb: Cleanup pxa168fb.h file 2014-01-17 10:57:43 +02:00
radeon.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
s1d13xxxfb.h s1d13xxxfb: drop unused code 2010-12-21 01:05:43 +09:00
sa1100fb.h FB: sa1100: remove global sa1100fb_.*_power function pointers 2012-02-21 11:56:19 +00:00
samsung_fimd.h drm/exynos: add macro to get the address of START_S reg 2015-08-31 00:27:37 +09:00
sh_mobile_lcdc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sh_mobile_meram.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sisfb.h UAPI: (Scripted) Disintegrate include/video 2012-12-20 17:14:26 +00:00
sstfb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tdfx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tgafb.h
…
trident.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udlfb.h udlfb: set optimal write delay 2018-09-09 19:56:01 +02:00
uvesafb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vga.h arch, drivers: don't include <asm/io.h> directly, use <linux/io.h> instead 2015-08-10 23:07:05 -04:00
videomode.h videomode: videomode_from_timing work 2013-03-21 14:34:33 +02:00
w100fb.h
…