openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: dts: remove display power domain for exynos5420 

Display domain is removed due to instability issues. Explaining
the problem below:

exynos_init_late triggers the pm_genpd_poweroff_unused which powers
off the unused power domains. This call hits before the trigger to
deferred probes.

DRM DP Panel defers the probe due to supply get failure. By the time,
deferred probe is scheduled again, Display Power Domain is powered
off by pm_genpd_poweroff_unused.

FIMD and DP drivers are accessing registers during Probe and Bind
callbacks. If display domain is enabled/disabled around register
accesses, display domain gets unstable and we are getting Power Domain
Disable fail notification. Increasing the Timeout also didn't help.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Rahul Sharma 2014-07-16 08:37:00 +09:00 committed by Kukjin Kim
parent 5a852743a4
commit d51cad7df8
1 changed files with 0 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/boot/dts/exynos5420.dtsi
View File

@ -262,11 +262,6 @@ mfc_pd: power-domain@10044060 {
reg = <0x10044060 0x20>;
};
disp_pd: power-domain@100440C0 {
compatible = "samsung,exynos4210-pd";
reg = <0x100440C0 0x20>;
};
msc_pd: power-domain@10044120 {
compatible = "samsung,exynos4210-pd";
reg = <0x10044120 0x20>;
@ -518,7 +513,6 @@ dp: dp-controller@145B0000 {
};
fimd: fimd@14400000 {
samsung,power-domain = <&disp_pd>;
clocks = <&clock CLK_SCLK_FIMD1>, <&clock CLK_FIMD1>;
clock-names = "sclk_fimd", "fimd";
};