linux-kernel - Re: [PATCH 2/2] ASoC: atmel: compile pcm driver in snd-soc-atmel_ssc

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Message-ID: <20150528093614.GL2185@piout.net>
Date:	Thu, 28 May 2015 11:36:14 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Mark Brown <broonie@...nel.org>, Arnd Bergmann <arnd@...db.de>,
	alsa-devel@...a-project.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ASoC: atmel: compile pcm driver in
 snd-soc-atmel_ssc_dai

Hi,

On 27/05/2015 at 11:25:49 +0200, Paul Bolle wrote :
> On Wed, 2015-05-27 at 11:19 +0200, Alexandre Belloni wrote:
> > However, the Kconfig maintainer found a way to do the right thing so we
> > may as well drop that patch and keep those as modules.
> 
> Perhaps I missed a message: do you have a link?
> 

It was part of a private discussion. This would give that (replaces my
other patch) if you want to test:

>From b93ca1a4d9fa63c37e3d2b0aecbd1ec691a40922 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Date: Mon, 25 May 2015 23:42:17 +0200
Subject: [PATCH] ASoC: atmel: properly select dma driver state

It is currently possible to have CONFIG_SND_ATMEL_SOC_SSC=y with either
CONFIG_SND_ATMEL_SOC_PDC=m or CONFIG_SND_ATMEL_SOC_DMA=m. This results in a
driver that compiles but does not link with this kind of error:

sound/built-in.o: In function `atmel_ssc_set_audio':
(.text+0x87d90): undefined reference to `atmel_pcm_pdc_platform_register'
sound/built-in.o: In function `atmel_ssc_put_audio':
(.text+0x8879a): undefined reference to `atmel_pcm_pdc_platform_unregister'

Introduce new config options SND_ATMEL_SOC_SSC_PDC and
SND_ATMEL_SOC_SSC_DMA which should be used by the board drivers and the
correct logic to properly select the SND_ATMEL_SOC_PDC and
SND_ATMEL_SOC_DMA states.

Reported-by: Randy Dunlap <rdunlap@...radead.org>

Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
---
 sound/soc/atmel/Kconfig | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
index 93abe4e6d596..1489cd461aec 100644
--- a/sound/soc/atmel/Kconfig
+++ b/sound/soc/atmel/Kconfig
@@ -10,20 +10,31 @@ if SND_ATMEL_SOC
 
 config SND_ATMEL_SOC_PDC
 	tristate
+	default m if SND_ATMEL_SOC_SSC_PDC=m && SND_ATMEL_SOC_SSC=m
+	default y if SND_ATMEL_SOC_SSC_PDC=y || (SND_ATMEL_SOC_SSC_PDC=m && SND_ATMEL_SOC_SSC=y)
+
+config SND_ATMEL_SOC_SSC_PDC
+	tristate
 
 config SND_ATMEL_SOC_DMA
 	tristate
 	select SND_SOC_GENERIC_DMAENGINE_PCM
+	default m if SND_ATMEL_SOC_SSC_DMA=m && SND_ATMEL_SOC_SSC=m
+	default y if SND_ATMEL_SOC_SSC_DMA=y || (SND_ATMEL_SOC_SSC_DMA=m && SND_ATMEL_SOC_SSC=y)
+
+config SND_ATMEL_SOC_SSC_DMA
+	tristate
 
 config SND_ATMEL_SOC_SSC
 	tristate
+	default y if SND_ATMEL_SOC_SSC_DMA=y || SND_ATMEL_SOC_SSC_PDC=y
+	default m if SND_ATMEL_SOC_SSC_DMA=m || SND_ATMEL_SOC_SSC_PDC=m
 
 config SND_AT91_SOC_SAM9G20_WM8731
 	tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
 	depends on ARCH_AT91 || COMPILE_TEST
 	depends on ATMEL_SSC && SND_SOC_I2C_AND_SPI
-	select SND_ATMEL_SOC_PDC
-	select SND_ATMEL_SOC_SSC
+	select SND_ATMEL_SOC_SSC_PDC
 	select SND_SOC_WM8731
 	help
 	  Say Y if you want to add support for SoC audio on WM8731-based
@@ -33,8 +44,7 @@ config SND_ATMEL_SOC_WM8904
 	tristate "Atmel ASoC driver for boards using WM8904 codec"
 	depends on ARCH_AT91 || COMPILE_TEST
 	depends on ATMEL_SSC && I2C
-	select SND_ATMEL_SOC_SSC
-	select SND_ATMEL_SOC_DMA
+	select SND_ATMEL_SOC_SSC_DMA
 	select SND_SOC_WM8904
 	help
 	  Say Y if you want to add support for Atmel ASoC driver for boards using
@@ -44,8 +54,7 @@ config SND_AT91_SOC_SAM9X5_WM8731
 	tristate "SoC Audio support for WM8731-based at91sam9x5 board"
 	depends on ARCH_AT91 || COMPILE_TEST
 	depends on ATMEL_SSC && SND_SOC_I2C_AND_SPI
-	select SND_ATMEL_SOC_SSC
-	select SND_ATMEL_SOC_DMA
+	select SND_ATMEL_SOC_SSC_DMA
 	select SND_SOC_WM8731
 	help
 	  Say Y if you want to add support for audio SoC on an
-- 
2.1.4

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