redonkable/alistair23-linux
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alistair23-linux/drivers/video/fbdev
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Mikulas Patocka 76ebebd246 mach64: detect the dot clock divider correctly on sparc 
On Sun Ultra 5, it happens that the dot clock is not set up properly for
some videomodes. For example, if we set the videomode "r1024x768x60" in
the firmware, Linux would incorrectly set a videomode with refresh rate
180Hz when booting (suprisingly, my LCD monitor can display it, although
display quality is very low).

The reason is this: Older mach64 cards set the divider in the register
VCLK_POST_DIV. The register has four 2-bit fields (the field that is
actually used is specified in the lowest two bits of the register
CLOCK_CNTL). The 2 bits select divider "1, 2, 4, 8". On newer mach64 cards,
there's another bit added - the top four bits of PLL_EXT_CNTL extend the
divider selection, so we have possible dividers "1, 2, 4, 8, 3, 5, 6, 12".
The Linux driver clears the top four bits of PLL_EXT_CNTL and never sets
them, so it can work regardless if the card supports them. However, the
sparc64 firmware may set these extended dividers during boot - and the
mach64 driver detects incorrect dot clock in this case.

This patch makes the driver read the additional divider bit from
PLL_EXT_CNTL and calculate the initial refresh rate properly.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Ville Syrjälä <syrjala@sci.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-07 22:41:05 -07:00
..
aty mach64: detect the dot clock divider correctly on sparc 2018-10-07 22:41:05 -07:00
core fbcon: Do not takeover the console from atomic context 2018-08-10 17:23:02 +02:00
geode x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping 2018-02-15 01:15:52 +01:00
i810 License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
intelfb video: fbdev: intelfb: deprecate pci_get_bus_and_slot() 2018-01-17 08:16:46 -06:00
kyro video: fbdev: kyro: constify pci_device_id. 2017-08-01 17:20:42 +02:00
matrox video: matroxfb: Delete an error message for a failed memory allocation in matroxfb_crtc2_probe() 2018-03-28 16:34:28 +02:00
mb862xx treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
mbx License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmp fbdev changes for v4.18: 2018-06-17 05:00:24 +09:00
nvidia fbdev changes for v4.18: 2018-06-17 05:00:24 +09:00
omap fbdev: omapfb: off by one in omapfb_register_client() 2018-07-24 19:11:28 +02:00
omap2 fbdev/omapfb: fix omapfb_memory_read infoleak 2018-09-26 18:11:22 +02:00
riva treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
savage video: fbdev: savage: Replace mdelay with usleep_range in savage_init_hw 2018-04-24 18:11:21 +02:00
sis video: fbdev: sis: avoid mismatched prototypes 2018-03-12 17:06:52 +01:00
vermilion video: fbdev: vermilion: use 64-bit arithmetic instead of 32-bit 2018-03-12 17:06:54 +01:00
via video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
68328fb.c video: fbdev: annotate fb_fix_screeninfo with const and __initconst 2017-09-04 16:00:49 +02:00
acornfb.c drivers/video/fbdev: Fixing coding guidelines in acornfb.c 2017-04-07 17:03:24 +02:00
acornfb.h
amba-clcd-nomadik.c fbdev changes for v4.11: 2017-02-25 13:20:22 -08:00
amba-clcd-nomadik.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
amba-clcd-versatile.c video: ARM CLCD: use panel device node for panel initialization 2017-01-30 17:39:48 +01:00
amba-clcd-versatile.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
amba-clcd.c video: ARM CLCD: Improve a size determination in clcdfb_probe() 2018-03-28 16:34:29 +02:00
amifb.c fb: amifb: fix build warnings when not builtin 2018-07-31 13:06:58 +02:00
arcfb.c Annotate hardware config module parameters in drivers/video/ 2017-04-20 12:02:32 +01:00
arkfb.c video: fbdev: arkfb: constify pci_device_id. 2017-08-01 17:20:42 +02:00
asiliantfb.c video: fbdev: asiliantfb: constify pci_device_id. 2017-08-01 17:20:41 +02:00
atafb.c
atafb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atafb_iplan2p2.c
atafb_iplan2p4.c
atafb_iplan2p8.c
atafb_mfb.c
atafb_utils.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
atmel_lcdfb.c video: fbdev: atmel_lcdfb: convert to use GPIO descriptors 2018-03-12 17:06:52 +01:00
au1100fb.c fbdev changes for v4.18: 2018-06-17 05:00:24 +09:00
au1100fb.h
au1200fb.c video: fbdev: fix spelling mistake: "frambuffer" -> "framebuffer" 2018-05-15 12:41:11 +02:00
au1200fb.h fbdev: au1200fb: delete duplicate header contents 2018-01-04 16:53:49 +01:00
broadsheetfb.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
bt431.h
bt455.h
bw2.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
c2p.h
c2p_core.h
c2p_iplan2.c
c2p_planar.c
carminefb.c
carminefb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
carminefb_regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cg3.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
cg6.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
cg14.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
chipsfb.c video/chips: constify fb_fix_screeninfo and fb_var_screeninfo structures 2017-08-01 17:20:39 +02:00
cirrusfb.c video: fbdev: cirrusfb: mark expected switch fall-throughs 2017-11-09 18:09:32 +01:00
clps711x-fb.c video: clps711x-fb: Changing the compatibility string to match with the smallest supported chip 2016-07-06 17:38:19 +02:00
clps711xfb.c
cobalt_lcdfb.c video: cobalt_lcdfb: constify fb_fix_screeninfo structure 2017-08-01 17:20:39 +02:00
controlfb.c
controlfb.h fbdev: controlfb: Add missing modes to fix out of bounds access 2017-11-09 18:09:33 +01:00
cyber2000fb.c video: fbdev: make fb_videomode const 2017-09-04 16:00:49 +02:00
cyber2000fb.h
da8xx-fb.c fbdev: da8xx-fb: Drop unnecessary static 2017-08-01 17:20:39 +02:00
dnfb.c video/fbdev/dnfb: Use common error handling code in dnfb_probe() 2017-11-09 18:09:31 +01:00
edid.h
efifb.c efifb: BGRT: Add nobgrt option 2018-09-26 18:11:22 +02:00
ep93xx-fb.c dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc() 2016-03-09 14:57:51 +01:00
fb-puv3.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
ffb.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
fm2fb.c video: fm2fb: constify zorro_device_id 2017-09-04 16:00:49 +02:00
fsl-diu-fb.c video: fbdev: fsl-diu-fb: Remove VLA usage 2018-07-24 19:11:26 +02:00
g364fb.c
gbefb.c dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc() 2016-03-09 14:57:51 +01:00
goldfishfb.c video: goldfishfb: fix memory leak on driver remove 2018-07-24 19:11:27 +02:00
grvga.c video: fbdev: annotate fb_fix_screeninfo with const and __initconst 2017-09-04 16:00:49 +02:00
gxt4500.c
hecubafb.c video: fbdev: constify fb_fix_screeninfo and fb_var_screeninfo structures 2016-09-27 11:16:35 +03:00
hgafb.c video: fbdev: constify fb_fix_screeninfo and fb_var_screeninfo structures 2016-09-27 11:16:35 +03:00
hitfb.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
hpfb.c hpfb: use probe_kernel_read() 2017-05-27 15:41:17 -04:00
hyperv_fb.c use the new async probing feature for the hyperv drivers 2018-07-03 13:02:28 +02:00
i740_reg.h
i740fb.c video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
imsttfb.c video: fbdev: imsttfb: constify pci_device_id. 2017-08-01 17:20:43 +02:00
imxfb.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
jz4740_fb.c fbdev: jz4740-fb: Let the pinctrl driver configure the pins 2017-05-22 17:22:06 +02:00
Kconfig video: fbdev: via: allow COMPILE_TEST build 2018-05-15 12:41:10 +02:00
leo.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
macfb.c nubus: Adopt standard linked list implementation 2018-01-16 16:47:29 +01:00
macmodes.c
macmodes.h
Makefile video: fbdev: remove unused sh_mobile_meram driver 2018-05-14 15:47:30 +02:00
maxinefb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
metronomefb.c video: fbdev: metronomefb: fix some off by one bugs 2018-07-24 19:11:26 +02:00
mx3fb.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
mxsfb.c treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
n411.c Annotate hardware config module parameters in drivers/video/ 2017-04-20 12:02:32 +01:00
neofb.c video: fbdev: neofb: constify pci_device_id. 2017-08-01 17:20:44 +02:00
nuc900fb.c dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc() 2016-03-09 14:57:51 +01:00
nuc900fb.h
ocfb.c
offb.c video: offb: Deallocate the color map 2018-03-12 17:06:54 +01:00
p9100.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
platinumfb.c
platinumfb.h
pm2fb.c video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
pm3fb.c video: fbdev: pm3fb: constify pci_device_id. 2017-08-01 17:20:45 +02:00
pmag-aa-fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
pmag-ba-fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
pmagb-b-fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
ps3fb.c video: fbdev: annotate fb_fix_screeninfo with const and __initconst 2017-09-04 16:00:49 +02:00
pvr2fb.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
pxa3xx-gcu.c video: fbdev: pxa3xx_gcu: add devicetree bindings 2018-07-24 19:11:25 +02:00
pxa3xx-gcu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa168fb.c pxa168fb: prepare the clock 2018-09-26 18:11:22 +02:00
pxa168fb.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxafb.c video: fbdev: pxafb: Add support for lcd-supply regulator 2018-07-24 19:11:26 +02:00
pxafb.h video: fbdev: pxafb: Add support for lcd-supply regulator 2018-07-24 19:11:26 +02:00
q40fb.c video: fbdev: make fb_var_screeninfo const 2017-09-04 16:00:50 +02:00
s1d13xxxfb.c fbdev: s1d13xxxfb: remove m32r specific hacks 2018-03-26 15:56:46 +02:00
s3c-fb.c video: fbdev: s3c-fb: remove dead platform code for Exynos and S5PV210 platforms 2018-03-28 16:34:29 +02:00
s3c2410fb.c video: s3c2410fb: Register cpufreq notifier only on S3C24xx 2016-08-11 17:54:55 +03:00
s3c2410fb.h video: s3c2410fb: Register cpufreq notifier only on S3C24xx 2016-08-11 17:54:55 +03:00
s3fb.c video: fbdev: s3fb: constify pci_device_id. 2017-08-01 17:20:45 +02:00
sa1100fb.c video: sa1100fb: move pseudo palette into sa1100fb_info structure 2017-10-17 16:01:13 +02:00
sa1100fb.h video: sa1100fb: move pseudo palette into sa1100fb_info structure 2017-10-17 16:01:13 +02:00
sbuslib.c fbdev: Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper(). 2018-03-07 14:00:34 +01:00
sbuslib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
sh7760fb.c
sh_mobile_lcdcfb.c video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support 2018-05-14 15:47:30 +02:00
sh_mobile_lcdcfb.h video: fbdev: sh_mobile_lcdcfb: remove unused MERAM support 2018-05-14 15:47:30 +02:00
simplefb.c video: fbdev: simplefb: Stop including <linux/clk-provider.h> 2018-07-03 17:43:09 +02:00
skeletonfb.c docs: fix broken references with multiple hints 2018-06-15 18:10:01 -03:00
sm501fb.c video: sm501fb: Improve a size determination in sm501fb_probe() 2018-04-26 12:24:18 +02:00
sm712.h
sm712fb.c video: fbdev: sm712fb.c: fixed constant-left comparison warning 2017-08-01 17:20:38 +02:00
smscufx.c video: smscufx: Delete an error message for a failed memory allocation in ufx_realloc_framebuffer() 2018-03-28 16:34:28 +02:00
ssd1307fb.c video: ssd1307fb: Improve a size determination in ssd1307fb_probe() 2018-03-28 16:34:28 +02:00
sstfb.c
sticore.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stifb.c video/fbdev/stifb: Fix spelling mistake in fall-through annotation 2018-09-26 18:50:54 +02:00
sunxvr500.c video: fbdev: sunxvr500: constify pci_device_id. 2017-08-01 17:20:43 +02:00
sunxvr1000.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
sunxvr2500.c video: fbdev: sunxvr2500: constify pci_device_id. 2017-08-01 17:20:41 +02:00
tcx.c video: fbdev: Convert to using %pOF instead of full_name 2017-08-07 17:22:13 +02:00
tdfxfb.c video: fbdev: mark expected switch fall-throughs 2018-07-24 19:11:28 +02:00
tgafb.c
tmiofb.c
tridentfb.c video: fbdev: tridentfb: remove deadcode on unreachable case statement 2018-07-24 19:11:28 +02:00
udlfb.c udlfb: use spin_lock_irq instead of spin_lock_irqsave 2018-07-25 15:41:57 +02:00
uvesafb.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
valkyriefb.c
valkyriefb.h
vesafb.c
vfb.c vfb: fix video mode and line_length being set when loaded 2018-01-04 16:53:50 +01:00
vga16fb.c video: fbdev: remove redundant self assignment of 'height' 2017-12-29 19:48:43 +01:00
vt8500lcdfb.c video/fbdev/vt8500lcdfb: Delete an error message for a failed memory allocation in vt8500lcd_probe() 2017-12-29 19:48:44 +01:00
vt8500lcdfb.h
vt8623fb.c video: fbdev: vt8623fb: constify vt8623_timing_regs 2017-08-18 19:56:40 +02:00
w100fb.c treewide: kmalloc() -> kmalloc_array() 2018-06-12 16:19:22 -07:00
w100fb.h
wm8505fb.c video/fbdev/wm8505fb: Delete an error message for a failed memory allocation in wm8505fb_probe() 2017-12-29 19:48:43 +01:00
wm8505fb_regs.h
wmt_ge_rops.c
wmt_ge_rops.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xen-fbfront.c treewide: Use array_size() in vmalloc() 2018-06-12 16:19:22 -07:00
xilinxfb.c video: fbdev: Fix multiple style issues in xilinxfb 2017-08-21 16:49:57 +02:00