* [RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board
@ 2016-01-29 8:49 Xing Zheng
2016-02-02 21:43 ` Heiko Stübner
0 siblings, 1 reply; 2+ messages in thread
From: Xing Zheng @ 2016-01-29 8:49 UTC (permalink / raw)
To: linux-rockchip-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r
Cc: keescook-hpIqsD4AKlfQT0dZR+AlfA, leozwang-hpIqsD4AKlfQT0dZR+AlfA,
heiko-4mtYJXux2i+zQB+pC5nmwQ, Xing Zheng, Rob Herring, Pawel Moll,
Mark Rutland, Ian Campbell, Kumar Gala, Russell King,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA,
linux-kernel-u79uwXL29TY76Z2rM5mHXA
If we playback the 8KHz FS audio with the 256 mclk_fs, we need the
mclk = 256 * 8000 = 2.048MHz, the frac div is 594 / 2.048 = 290,
the frac div value 0x00809015 set to the CRU_CLKSEL7_CON will cause
to hang.
We increase the mclk_fs to 512, will get the mclk = 512 * 8000 =
4.096MHz, use 0x01009015 instead of 0x00809015 to work around this
issue. We will keep tracking it.
Signed-off-by: Xing Zheng <zhengxing-TNX95d0MmH7DzftRWevZcw@public.gmane.org>
---
arch/arm/boot/dts/rk3036-kylin.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/rk3036-kylin.dts b/arch/arm/boot/dts/rk3036-kylin.dts
index 190f22c..be468f9 100644
--- a/arch/arm/boot/dts/rk3036-kylin.dts
+++ b/arch/arm/boot/dts/rk3036-kylin.dts
@@ -67,7 +67,7 @@
compatible = "simple-audio-card";
simple-audio-card,format = "i2s";
simple-audio-card,name = "rockchip,rt5616-codec";
- simple-audio-card,mclk-fs = <256>;
+ simple-audio-card,mclk-fs = <512>;
simple-audio-card,widgets =
"Microphone", "Microphone Jack",
"Headphone", "Headphone Jack";
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board
2016-01-29 8:49 [RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board Xing Zheng
@ 2016-02-02 21:43 ` Heiko Stübner
0 siblings, 0 replies; 2+ messages in thread
From: Heiko Stübner @ 2016-02-02 21:43 UTC (permalink / raw)
To: Xing Zheng
Cc: linux-rockchip, keescook, leozwang, Rob Herring, Pawel Moll,
Mark Rutland, Ian Campbell, Kumar Gala, Russell King,
linux-arm-kernel, devicetree, linux-kernel
Am Freitag, 29. Januar 2016, 16:49:21 schrieb Xing Zheng:
> If we playback the 8KHz FS audio with the 256 mclk_fs, we need the
> mclk = 256 * 8000 = 2.048MHz, the frac div is 594 / 2.048 = 290,
> the frac div value 0x00809015 set to the CRU_CLKSEL7_CON will cause
> to hang.
>
> We increase the mclk_fs to 512, will get the mclk = 512 * 8000 =
> 4.096MHz, use 0x01009015 instead of 0x00809015 to work around this
> issue. We will keep tracking it.
>
> Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
applied to my dts32 branch for 4.6
Thanks
Heiko
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2016-02-02 21:43 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-01-29 8:49 [RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board Xing Zheng
2016-02-02 21:43 ` Heiko Stübner
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).