[alsa-devel] Intel Baytrail Linux Audio

[Antonio Ospite]

On Wed, 08 Jul 2015 12:32:17 -0400
Tyler Yeomans <tyeo098 at gmail.com> wrote:

> Antonio,
> 
> Hmm...
> I have been running the driver like so:
> (from sound/soc/intel/common/sst-acpi.c)
> static struct sst_acpi_desc sst_acpi_baytrail_desc = {
>      .drv_name = "baytrail-pcm-audio",
>      .machines = baytrail_machines,
>      .resindex_lpe_base = 0,
>      .resindex_pcicfg_base = 1,
>      .resindex_fw_base = 2,
> *    .irqindex_host_ipc = 0,*
>      .sst_id = SST_DEV_ID_BYT,
>      .resindex_dma_base = -1,
> };
> 
> Which is what the patch at 
> https://bugzilla.kernel.org/attachment.cgi?id=155341 says to do.
>

Ah, sorry, the info from that bug report is outdated, for the
snd-intel-sst-acpi you have to change
sound/soc/intel/atom/sst/sst_acpi.c:


diff --git a/sound/soc/intel/atom/sst/sst_acpi.c b/sound/soc/intel/atom/sst/sst_acpi.c
index bb19b58..0badfa3 100644
--- a/sound/soc/intel/atom/sst/sst_acpi.c
+++ b/sound/soc/intel/atom/sst/sst_acpi.c
@@ -118,7 +118,7 @@ static const struct sst_res_info byt_rvp_res_info = {
        .mbox_size = 0x1000,
        .acpi_lpe_res_index = 0,
        .acpi_ddr_index = 2,
-       .acpi_ipc_irq_index = 5,
+       .acpi_ipc_irq_index = 0,
 };

 static struct sst_platform_info byt_rvp_platform_data = {


I didn't have to do that because I fixed the DSDT.

> However I also noticed in this file that its looking for the wrong 
> firmware:
> static struct sst_acpi_mach baytrail_machines[] = {
> *{ "10EC5640", "byt-rt5640", "intel/fw_sst_0f28.bin-48kHz_i2s_master" },*
>      { "193C9890", "byt-max98090", 
> "intel/fw_sst_0f28.bin-48kHz_i2s_master" },
>      {}
> };
> 
> Which will not point to the SSP0 firmware uploaded by Vinod.
> 

Just to recap: make sure to use the snd-intel-sst-acpi driver instead
of snd-soc-sst-acpi as explained earlier in this thread:
http://mailman.alsa-project.org/pipermail/alsa-devel/2015-July/094418.html

As a quick and dirty way to do it you can remove snd-soc-sst-acpi.ko
from the modules installation dir.

A more robust solution would be to blacklist snd-soc-sst-acpi.

Ciao,
   Antonio

-- 
Antonio Ospite
http://ao2.it

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