| Message ID | 1484864995-10679-1-git-send-email-javier@osg.samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Hello, On 01/19/2017 07:29 PM, Javier Martinez Canillas wrote: > On Exynos5800 SoC the SCALER block uses 2 input clocks: CLK_ACLK_300_GSCL > and CLK_ACLK432_SCALER, so both needs to be ungated in order to access it. > > The SoC manual say the CLK_ACLK432_SCALER is needed to access the internal > buses, so add this clock as another asynchronous bridges (ASB) clock. > > The Exynos5420 only has the CLK_ACLK_300_GSCL clock defined. So just using > this definition from exynos5420.dtsi in Exynos5800 leads to the following: > Please ignore this patch as suggested by Marek. Instead I'll post a patch to mark the clock as CLK_IS_CRITICAL, as a temporary workaround until a proper runtime PM based solution gets merged. Best regards,
diff --git a/arch/arm/boot/dts/exynos5800.dtsi b/arch/arm/boot/dts/exynos5800.dtsi index 8213016803e5..4847abbf7a92 100644 --- a/arch/arm/boot/dts/exynos5800.dtsi +++ b/arch/arm/boot/dts/exynos5800.dtsi @@ -134,3 +134,11 @@ &mfc { compatible = "samsung,mfc-v8"; }; + +&gsc_pd { + clocks = <&clock CLK_FIN_PLL>, + <&clock CLK_MOUT_USER_ACLK300_GSCL>, + <&clock CLK_GSCL0>, <&clock CLK_GSCL1>, + <&clock CLK_ACLK432_SCALER>; + clock-names = "oscclk", "clk0", "asb0", "asb1", "asb2"; +};
On Exynos5800 SoC the SCALER block uses 2 input clocks: CLK_ACLK_300_GSCL and CLK_ACLK432_SCALER, so both needs to be ungated in order to access it. The SoC manual say the CLK_ACLK432_SCALER is needed to access the internal buses, so add this clock as another asynchronous bridges (ASB) clock. The Exynos5420 only has the CLK_ACLK_300_GSCL clock defined. So just using this definition from exynos5420.dtsi in Exynos5800 leads to the following: [ 227.008559] Unhandled fault: imprecise external abort (0x1c06) at 0x00048e14 [ 227.015116] pgd = ed5dc000 [ 227.017213] [00048e14] *pgd=b17c6835 [ 227.020889] Internal error: : 1c06 [#1] PREEMPT SMP ARM ... [ 227.241585] [<bf2429bc>] (gsc_wait_reset [exynos_gsc]) from [<bf24009c>] (gsc_runtime_resume+0x9c/0xec [exynos_gsc]) [ 227.252331] [<bf24009c>] (gsc_runtime_resume [exynos_gsc]) from [<c042e488>] (genpd_runtime_resume+0x120/0x1d4) [ 227.262294] [<c042e488>] (genpd_runtime_resume) from [<c04241c0>] (__rpm_callback+0xc8/0x218) domain status slaves /device runtime status ---------------------------------------------------------------------- power-domain@100440C0 on /devices/platform/soc/14450000.mixer active /devices/platform/soc/14530000.hdmi active power-domain@10044120 on power-domain@10044060 off-0 power-domain@10044020 on power-domain@10044000 on /devices/platform/soc/13e00000.video-scaler suspended /devices/platform/soc/13e10000.video-scaler resuming Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> --- arch/arm/boot/dts/exynos5800.dtsi | 8 ++++++++ 1 file changed, 8 insertions(+)