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Date: Tue, 12 May 2015 06:53:29 -0600
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From: Daniel Drake <drake@endlessm.com>
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Cc: Larry Finger <Larry.Finger@lwfinger.net>,
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Hi Champion,

Thanks for the suggestion.

On Mon, May 11, 2015 at 8:54 PM, 陈艳萍 <champion_chen@realsil.com.cn> wrote:
> Dear Daniel,
>         For some reason, 8723B chip with single antenna and 2 antennas have different settings and this can only be modified manually.
> BT driver will set controller to use S0 when use 2 antennas.
>         In my submitted driver , there are following codes to add the config settings at the end of firmware to be downloaded.
> Would you please try to add these codes and test again?
>
> /*for 8723B,use S0 Anttena for bluetooth*/
>         if(lmp_version==ROM_LMP_8723B)
>         {
>                 memcpy(*buf+patch_entry->patch_length,RTK_CONFIG_SIGNATURE,6);
>                 if (USE_S0_ANTTENA)
>                         memcpy(*buf+patch_entry->patch_length+6,CONFIG_S0_ANTTENA,4);
>                 else
>                         memcpy(*buf+patch_entry->patch_length+6,CONFIG_S1_ANTTENA,4);
>                 *buf_len += 10;
>                 BT_DBG("USE_S0_ANTTENA");
>         }

Yes, I saw this code already and experimented with it. It didn't seem
to make any difference. I'll try again though, which configuration
should I use, CONFIG_S0_ANTTENA or CONFIG_S1_ANTTENA?

By only connecting one antenna at a time, I was able to see that
bluetooth happily uses either one. I have a feeling that the
preference you write above is overridden by code in the
halbtc8723b2ant.c btcoexist driver.

Daniel