linux-kernel - Re: [PATCH 00/14] Add support for FM radio in hcill and kill TI

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Date:   Sat, 22 Dec 2018 03:47:53 +0100
From:   Sebastian Reichel <sre@...nel.org>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Rob Herring <robh@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pavel Machek <pavel@....cz>, linux-bluetooth@...r.kernel.org,
        linux-media@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 00/14] Add support for FM radio in hcill and kill TI_ST

Hi,

On Fri, Dec 21, 2018 at 10:02:05AM -0800, Tony Lindgren wrote:
> * Sebastian Reichel <sre@...nel.org> [181221 01:18]:
> > The new code has been tested on the Motorola Droid 4. For testing the audio
> > should be configured to route Ext to Speaker or Headphone. Then you need to
> > plug headphone, since its cable is used as antenna. For testing there is a
> > 'radio' utility packages in Debian. When you start the utility you need to
> > specify a frequency, since initial get_frequency returns an error:
> 
> Nice, good to see that ti-st kim stuff gone :) I gave this a quick
> try using fmtools.git and fmscan works just fine. No luck yet with
> fm though, it gives VIDIOC_G_CTRL: Not a tty error somehow so
> maybe I'm missing some options, patch below for omap2plus_defconfig.

I only did a few quick tests with 'radio' utility. I could scan
for stations and I could listen to some station. I suppose the
wl128x-radio driver has some buggy code paths, but that are
unrelated to this patchset.

> Hmm so looks like nothing to configure for the clocks or
> CPCAP_BIT_ST_L_TIMESLOT bits for cap for the EXT? So the
> wl12xx audio is wired directly to cpcap EXT then and not a
> TDM slot on the mcbsp huh?

For FM radio it's directly wired to EXT with no DAI being required.
I think that EXT is only used by FM radio and not by bluetooth. BT
seems to use TDM.

> > Merry Christmas!
> 
> Same to you!
> 
> Tony
> 
> 8< --------------------------------
> From tony Mon Sep 17 00:00:00 2001
> From: Tony Lindgren <tony@...mide.com>
> Date: Fri, 21 Dec 2018 07:57:09 -0800
> Subject: [PATCH] ARM: omap2plus_defconfig: Add RADIO_WL128X as a loadable
>  module
> 
> This allows using the FM radio in the wl12xx chips after modprobe
> fm_drv using radio from xawt, or fmtools.

Mh. I suppose I forgot to add alias to support autoloading the
FM module.

> Note that the firmware placed into /lib/firmware/ti-connectivity
> directory:
> 
> fm_rx_ch8_1283.2.bts
> fmc_ch8_1283.2.bts

There is also a TX firmware. The Droid 4's chip should support this,
but I don't know if there is audio routing for this feature.

-- Sebastian

> Signed-off-by: Tony Lindgren <tony@...mide.com>
> ---
>  arch/arm/configs/omap2plus_defconfig | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/arch/arm/configs/omap2plus_defconfig b/arch/arm/configs/omap2plus_defconfig
> --- a/arch/arm/configs/omap2plus_defconfig
> +++ b/arch/arm/configs/omap2plus_defconfig
> @@ -126,6 +126,7 @@ CONFIG_AF_RXRPC=m
>  CONFIG_RXKAD=y
>  CONFIG_CFG80211=m
>  CONFIG_MAC80211=m
> +CONFIG_RFKILL=m
>  CONFIG_DEVTMPFS=y
>  CONFIG_DEVTMPFS_MOUNT=y
>  CONFIG_DMA_CMA=y
> @@ -343,12 +344,14 @@ CONFIG_IR_GPIO_TX=m
>  CONFIG_IR_PWM_TX=m
>  CONFIG_MEDIA_SUPPORT=m
>  CONFIG_MEDIA_CAMERA_SUPPORT=y
> +CONFIG_MEDIA_RADIO_SUPPORT=y
>  CONFIG_MEDIA_CEC_SUPPORT=y
>  CONFIG_MEDIA_CONTROLLER=y
>  CONFIG_VIDEO_V4L2_SUBDEV_API=y
>  CONFIG_V4L_PLATFORM_DRIVERS=y
>  CONFIG_VIDEO_OMAP3=m
>  CONFIG_CEC_PLATFORM_DRIVERS=y
> +CONFIG_RADIO_WL128X=m
>  # CONFIG_MEDIA_SUBDRV_AUTOSELECT is not set
>  CONFIG_VIDEO_TVP5150=m
>  CONFIG_DRM=m
> -- 
> 2.19.2

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