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Groups > linux.kernel > #1321566 > unrolled thread
| Started by | Xing Zheng <zhengxing@rock-chips.com> |
|---|---|
| First post | 2016-01-29 09:50 +0100 |
| Last post | 2016-02-02 22:50 +0100 |
| Articles | 2 — 2 participants |
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[RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board Xing Zheng <zhengxing@rock-chips.com> - 2016-01-29 09:50 +0100
Re: [RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board Heiko Stübner <heiko@sntech.de> - 2016-02-02 22:50 +0100
| From | Xing Zheng <zhengxing@rock-chips.com> |
|---|---|
| Date | 2016-01-29 09:50 +0100 |
| Subject | [RFC PATCH] ARM: dts: rockchip: increase the mclk_fs to 512 for kylin board |
| Message-ID | <qWcUG-90-15@gated-at.bofh.it> |
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> --- 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
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| From | Heiko Stübner <heiko@sntech.de> |
|---|---|
| Date | 2016-02-02 22:50 +0100 |
| Message-ID | <qXQZJ-Oy-29@gated-at.bofh.it> |
| In reply to | #1321566 |
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
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