Messages in this thread | | | Subject | Re: [PATCH v2] arm: dts: Fix audio card detection on peach boards | From | Javier Martinez Canillas <> | Date | Mon, 30 Nov 2015 11:01:33 -0300 |
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Hello Alim,
On 10/12/2015 09:37 AM, Alim Akhtar wrote: > Since commit 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards"), > sound card detection is broken on peach boards and gives below errors: > > [ 3.630457] max98090 7-0010: MAX98091 REVID=0x51 > [ 3.634233] max98090 7-0010: use default 2.8v micbias > [ 3.640985] snow-audio sound: HiFi <-> 3830000.i2s mapping ok > [ 3.645307] max98090 7-0010: Invalid master clock frequency > [ 3.650824] snow-audio sound: ASoC: Peach-Pi-I2S-MAX98091 late_probe() failed: -22 > [ 3.658914] snow-audio sound: snd_soc_register_card failed (-22) > [ 3.664366] snow-audio: probe of sound failed with error -22 > > This patch adds missing assigned-clocks and assigned-clock-parents for > pmu_system_controller node which is used as "mclk" for audio codec. > > Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com> > Fixes: 2fad972d45c4 ("ARM: dts: Add mclk entry for Peach boards")
I found that this patch is not enough to have proper audio working on an Exynos5800 Peach Pi. Even playing a simple wav does not work:
$ time aplay -D sysdefault /usr/share/sounds/alsa/Front_Center.wav Playing WAVE '/usr/share/sounds/alsa/Front_Center.wav' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
real 0m1.138s user 0m0.005s sys 0m0.005s
This should be ~1.5 seconds so audio is processed faster than expected.
So something else besides making the CLKOUT to provide a valid frequency for the codec's master clock is needed.
Do you know what's missing in mainline? For instance, I see that the sound/soc/samsung/snow.c ASoC machine driver doesn't have a hw_params but I'm not that familiar with ALSA to know if that makes sense or not.
Also, do you know if the "simple-audio-card" can be used instead for snow and peachs as it is used for other Exynos5 boards or a specific ASoC machine driver is really needed for these Chromebooks?
Best regards, -- Javier Martinez Canillas Open Source Group Samsung Research America
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