linux-kernel - [PATCH 4/9] ASoC: Intel: Fix nested/unnecessary Kconfig dependencies

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Date:   Thu, 14 Dec 2017 18:44:46 -0600
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...nel.org
Cc:     tiwai@...e.de, broonie@...nel.org, torvalds@...ux-foundation.org,
        vinod.koul@...el.com, liam.r.girdwood@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, arnd@...db.de,
        linux-kernel@...r.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Subject: [PATCH 4/9] ASoC: Intel: Fix nested/unnecessary Kconfig dependencies

This patch fixes a number of issues:
1. IOSF_MBI is only needed for byt-cr detection, which is only supported
on Baytrail/Cherrytrail, move to HiFi2 config

2. SND_SOC_INTEL_SST should not select SND_SOC_INTEL_SST_ACPI, the latter
config is only valid for Haswell/Baytrail legacy but not needed by Skylake

3. SND_SST_IPC_ACPI, used only by the atom/sst driver, should not select
SND_SOC_INTEL_SST, none of the code under common/sst*.c is used

This nesting of configs really makes no sense, it's easier to maintain
if for each platform one can control what is strictly required.

Compiled-tested with each of Haswell, Baytrail legacy, HiFi2, SKL cases
selected independently. 0-day and explicit randconfig tests did not report
additional issues and no functionality loss was observed in Intel tests on
HIFI2 and SKYLAKE platforms

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 sound/soc/intel/Kconfig | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/soc/intel/Kconfig b/sound/soc/intel/Kconfig
index f25edeb7cff6..e6f7fc91900c 100644
--- a/sound/soc/intel/Kconfig
+++ b/sound/soc/intel/Kconfig
@@ -27,8 +27,6 @@ config SND_SST_IPC_PCI
 config SND_SST_IPC_ACPI
 	tristate
 	select SND_SST_IPC
-	select SND_SOC_INTEL_SST
-	select IOSF_MBI
 	# This option controls the ACPI-based IPC for HiFi2 platforms
 	# (Baytrail, Cherrytrail)
 
@@ -39,7 +37,6 @@ config SND_SOC_INTEL_SST_ACPI
 
 config SND_SOC_INTEL_SST
 	tristate
-	select SND_SOC_INTEL_SST_ACPI if ACPI
 
 config SND_SOC_INTEL_SST_FIRMWARE
 	tristate
@@ -52,6 +49,7 @@ config SND_SOC_INTEL_HASWELL
 	depends on SND_DMA_SGBUF && ACPI
 	depends on DMADEVICES
 	select SND_SOC_INTEL_SST
+	select SND_SOC_INTEL_SST_ACPI
 	select SND_SOC_INTEL_SST_FIRMWARE
 	select SND_SOC_ACPI_INTEL_MATCH
 	help
@@ -63,6 +61,7 @@ config SND_SOC_INTEL_BAYTRAIL
 	tristate "Intel ASoC SST driver for Baytrail (legacy)"
 	depends on DMADEVICES && ACPI
 	select SND_SOC_INTEL_SST
+	select SND_SOC_INTEL_SST_ACPI
 	select SND_SOC_INTEL_SST_FIRMWARE
 	select SND_SOC_ACPI_INTEL_MATCH
 	help
@@ -89,6 +88,7 @@ config SND_SST_ATOM_HIFI2_PLATFORM
 	tristate "Intel ASoC SST driver for ACPI HiFi2 platforms (Baytrail, Cherrytrail)"
 	depends on X86 && ACPI
 	select SND_SST_IPC_ACPI
+	select IOSF_MBI
 	select SND_SOC_COMPRESS
 	select SND_SOC_ACPI_INTEL_MATCH
 	help
-- 
2.14.1