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android_kernel_xiaomi_sm8350/drivers/video
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Haavard Skinnemoen 3aa04f1b07 atmel_lcdfb: disable LCD and DMA engines when suspending 
When suspending the system with atmel_lcdfb enabled, I sometimes see
this:

	atmel_lcdfb atmel_lcdfb.0: FIFO underflow 0x10

Which can be explained by the fact that we're not stopping the LCD
controller and its DMA engine when suspending, we're just gating the
clocks to them.

There's another potential issue which may be harder to trigger but
much more nasty: If we gate the clocks at _just_ the right moment,
e.g. when the DMA engine is doing a bus transaction, we may cause the
DMA engine to violate the system bus protocol and cause a lockup.

Avoid these issues by shutting down the LCD controller before entering
suspend (and restarting it when resuming). This prevents the underrun
from happening in the first place, and prevents whatever nastiness is
happening when the bus clock stops in the middle of a DMA transfer.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-09-13 14:41:52 -07:00
..
aty radeonfb: fix accel engine hangs 2008-08-12 16:07:28 -07:00
backlight [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
console fbcon: prevent cursor disappearance after switching to 512 character font 2008-08-12 16:07:29 -07:00
display
geode lxfb: fix console blanking 2008-07-24 10:47:40 -07:00
i810
intelfb i2c: Let framebuffer drivers set their I2C bus class to DDC 2008-07-14 22:38:28 +02:00
kyro
logo
matrox matrox maven: convert to a new-style i2c driver 2008-08-12 16:07:29 -07:00
mbx
nvidia
omap [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
pnx4008 [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
riva
savage
sis video/sis/: remove compat code 2008-07-24 10:47:37 -07:00
vermilion removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
68328fb.c
acornfb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
acornfb.h
am200epd.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
amba-clcd.c
amifb.c drivers/video/amifb.c cleanups 2008-07-24 10:47:40 -07:00
arcfb.c
arkfb.c removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
asiliantfb.c
atafb_iplan2p2.c
atafb_iplan2p4.c
atafb_iplan2p8.c
atafb_mfb.c
atafb_utils.h
atafb.c atafb: test virtual screen range before subtraction on unsigned 2008-07-24 10:47:37 -07:00
atafb.h
atmel_lcdfb.c atmel_lcdfb: disable LCD and DMA engines when suspending 2008-09-13 14:41:52 -07:00
au1100fb.c
au1100fb.h
au1200fb.c
au1200fb.h
bf54x-lq043fb.c Blackfin arch: move include/asm-blackfin header files to arch/blackfin 2008-08-27 10:51:02 +08:00
bfin-t350mcqb-fb.c lcd: add lcd_device to check_fb() entry in lcd_ops 2008-07-24 10:47:40 -07:00
bt431.h
bt455.h
bw2.c
c2p.c export c2p 2008-07-20 17:24:39 -07:00
c2p.h
carminefb_regs.h fbdev: add the carmine FB driver 2008-07-24 10:47:34 -07:00
carminefb.c fbdev: add the carmine FB driver 2008-07-24 10:47:34 -07:00
carminefb.h fbdev: add the carmine FB driver 2008-07-24 10:47:34 -07:00
cfbcopyarea.c
cfbfillrect.c
cfbimgblt.c
cg3.c
cg6.c
cg14.c
chipsfb.c
cirrusfb.c cirrusfb: check_par fixes 2008-09-02 19:21:38 -07:00
clps711xfb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
cobalt_lcdfb.c fbdev: add new Cobalt LCD framebuffer driver 2008-07-24 10:47:40 -07:00
controlfb.c
controlfb.h
cyber2000fb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
cyber2000fb.h
cyblafb.c
dnfb.c
edid.h
efifb.c
epson1355fb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
fb_ddc.c i2c: Let framebuffer drivers set their I2C bus class to DDC 2008-07-14 22:38:28 +02:00
fb_defio.c fbdefio: add set_page_dirty handler to deferred IO FB 2008-08-20 15:40:32 -07:00
fb_draw.h
fb_notify.c
fb_sys_fops.c
fbcmap.c
fbcvt.c
fbmem.c fbdefio: add set_page_dirty handler to deferred IO FB 2008-08-20 15:40:32 -07:00
fbmon.c fbdev: width and height are unsigned 2008-07-24 10:47:39 -07:00
fbsysfs.c
ffb.c
fm2fb.c
fsl-diu-fb.c freescale DIU: bug fix: add sanity check for AOI position 2008-08-15 08:35:43 -07:00
fsl-diu-fb.h
g364fb.c
gbefb.c gbefb: cmap FIFO timeout 2008-07-30 09:41:47 -07:00
gxt4500.c
hecubafb.c
hgafb.c hgafb: convert to new platform driver API 2008-07-24 10:47:39 -07:00
hitfb.c video: Fix up hp6xx driver build regressions. 2008-07-30 02:16:12 +09:00
hpfb.c
igafb.c
imacfb.c
imsttfb.c
imxfb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
imxfb.h
Kconfig video: sh7760fb: SH7760/SH7763 LCDC framebuffer driver 2008-07-24 10:47:41 -07:00
leo.c
macfb.c make macfb_setup() static 2008-07-26 12:00:12 -07:00
macmodes.c
macmodes.h
Makefile video: Kill off leaked CONFIG_FB_SH7343VOU reference. 2008-07-29 06:39:26 +09:00
maxinefb.c
metronomefb.c
modedb.c
n411.c
neofb.c neofb: drop the xtimings structure 2008-07-24 10:47:41 -07:00
offb.c fbdev: Teaches offb about palette on radeon r5xx/r6xx 2008-07-22 10:39:36 +10:00
output.c
p9100.c
platinumfb.c
platinumfb.h
pm2fb.c pm2fb: free cmap memory on module remove 2008-08-20 15:40:31 -07:00
pm3fb.c
pmag-aa-fb.c
pmag-ba-fb.c
pmagb-b-fb.c
ps3fb.c powerpc/ps3: Add a sub-match id to ps3_system_bus 2008-07-22 10:39:33 +10:00
pvr2fb.c sh: More header path fixups for mach dir refactoring. 2008-07-29 22:10:01 +09:00
pxafb.c [ARM] pxafb: fix the warning of incorrect lccr when lcd_conn is specified 2008-08-16 16:39:16 +01:00
pxafb.h pxafb: convert ctrlr_sem in a mutex 2008-07-24 10:47:37 -07:00
q40fb.c
s1d13xxxfb.c
s3c2410fb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
s3c2410fb.h
s3fb.c removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
sa1100fb.c [ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach 2008-08-07 09:55:48 +01:00
sa1100fb.h sa1100fb: convert ctrlr_sem in a mutex 2008-07-24 10:47:37 -07:00
sbuslib.c
sbuslib.h
sgivwfb.c
sh7760fb.c sh7760fb: write colormap value to hardware 2008-07-28 16:30:21 -07:00
sh_mobile_lcdcfb.c video: export sh_mobile_lcdc panel size 2008-08-11 20:17:55 +09:00
skeletonfb.c skeletonfb: update to correct platform driver usage 2008-07-24 10:47:39 -07:00
sm501fb.c sm501: fixup allocation code to be 64bit resource compliant 2008-07-24 10:47:40 -07:00
sstfb.c
sticore.h video/console/stico{n,re}.c: make code static 2008-07-26 12:00:12 -07:00
stifb.c video/stifb.c: make 2 functions static 2008-07-26 12:00:12 -07:00
sunxvr500.c
sunxvr2500.c
svgalib.c
syscopyarea.c
sysfillrect.c
sysimgblt.c
tcx.c
tdfxfb.c tdfxfb: fix frame buffer name overrun 2008-09-02 19:21:39 -07:00
tgafb.c
tridentfb.c tridentfb: remove warning message that cyblafb driver should be used 2008-07-24 10:47:36 -07:00
uvesafb.c uvesafb: change mode parameter to mode_option 2008-07-24 10:47:37 -07:00
valkyriefb.c
valkyriefb.h
vesafb.c
vfb.c vfb: only enable if explicitly requested when compiled in 2008-07-24 10:47:39 -07:00
vga16fb.c vga16fb: source code improvement 2008-07-24 10:47:38 -07:00
vgastate.c
vt8623fb.c removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00
w100fb.c
w100fb.h
xen-fbfront.c
xilinxfb.c removed unused #include <linux/version.h>'s 2008-08-23 12:14:12 -07:00