| Message ID | 1484908891-11820-1-git-send-email-javier@osg.samsung.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On 01/20/2017 11:41 AM, 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. > > But Exynos5420 only has the CLK_ACLK_300_GSCL as gsc_pd clk. So just using > this definition from exynos5420.dtsi in Exynos5800 leads to the following: [...] > So until a proper solution based on runtime PM gets merged, mark the clock > as critical to prevent it to be gated. > > Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com> > Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 01/20/2017 01:32 PM, Sylwester Nawrocki wrote: > On 01/20/2017 11:41 AM, 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. >> >> But Exynos5420 only has the CLK_ACLK_300_GSCL as gsc_pd clk. So just using >> this definition from exynos5420.dtsi in Exynos5800 leads to the following: > [...] >> So until a proper solution based on runtime PM gets merged, mark the clock >> as critical to prevent it to be gated. >> >> Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com> >> Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> > > Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Oops, the $subject patch can be dropped since as Marek just pointed out to me the changes introduced by that patch are already included in a patch which is already in the v4.10 fixes queue: https://git.kernel.org/cgit/linux/kernel/git/clk/linux.git/commit/?h=clk-next&id=318fa46cc60d37fec1e87dbf03a82aca0f5ce695
Hello Sylwester, On 01/20/2017 10:55 AM, Sylwester Nawrocki wrote: > On 01/20/2017 01:32 PM, Sylwester Nawrocki wrote: >> On 01/20/2017 11:41 AM, 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. >>> >>> But Exynos5420 only has the CLK_ACLK_300_GSCL as gsc_pd clk. So just using >>> this definition from exynos5420.dtsi in Exynos5800 leads to the following: >> [...] >>> So until a proper solution based on runtime PM gets merged, mark the clock >>> as critical to prevent it to be gated. >>> >>> Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com> >>> Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> >> >> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> > > Oops, the $subject patch can be dropped since as Marek just pointed out > to me the changes introduced by that patch are already included in a patch > which is already in the v4.10 fixes queue: > > https://git.kernel.org/cgit/linux/kernel/git/clk/linux.git/commit/?h=clk-next&id=318fa46cc60d37fec1e87dbf03a82aca0f5ce695 > Yes, I just answered to Marek in the other thread saying the same. He did mention the patch could fix the issue but for some reason I didn't see the CLK_ACLK_300_GSCL in the clocks marked as critical... Anyways, sorry for the noise. Best regards,
On 01/20/2017 11:00 AM, Javier Martinez Canillas wrote: > On 01/20/2017 10:55 AM, Sylwester Nawrocki wrote: [snip] >> >> Oops, the $subject patch can be dropped since as Marek just pointed out >> to me the changes introduced by that patch are already included in a patch >> which is already in the v4.10 fixes queue: >> >> https://git.kernel.org/cgit/linux/kernel/git/clk/linux.git/commit/?h=clk-next&id=318fa46cc60d37fec1e87dbf03a82aca0f5ce695 >> > > Yes, I just answered to Marek in the other thread saying the same. > He did mention the patch could fix the issue but for some reason I > didn't see the CLK_ACLK_300_GSCL in the clocks marked as critical... > err, I meant s/CLK_ACLK_300_GSCL/CLK_ACLK432_SCALER I should just stop writing emails today since clearly didn't get enough coffee. Best regards,
diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c index 8c8b495cbf0d..9876ec28b94c 100644 --- a/drivers/clk/samsung/clk-exynos5420.c +++ b/drivers/clk/samsung/clk-exynos5420.c @@ -586,7 +586,7 @@ static const struct samsung_gate_clock exynos5800_gate_clks[] __initconst = { GATE(CLK_ACLK550_CAM, "aclk550_cam", "mout_user_aclk550_cam", GATE_BUS_TOP, 24, 0, 0), GATE(CLK_ACLK432_SCALER, "aclk432_scaler", "mout_user_aclk432_scaler", - GATE_BUS_TOP, 27, 0, 0), + GATE_BUS_TOP, 27, CLK_IS_CRITICAL, 0), }; static const struct samsung_mux_clock exynos5420_mux_clks[] __initconst = {
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. But Exynos5420 only has the CLK_ACLK_300_GSCL as gsc_pd clk. 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 So until a proper solution based on runtime PM gets merged, mark the clock as critical to prevent it to be gated. Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> --- drivers/clk/samsung/clk-exynos5420.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)