[alsa-devel] [PATCH] ASoC: samsung: i2s: disable secondary DAI until it gets fixed

[Marek Szyprowski]

Secondary DAI in Exynos I2S driver is not used by any of the currently
supported boards and it causes problems due to some limitations in the
ASoC code. Disable it until it gets proper support both by board-specific
and ASoC core code. Also disable IDMA support, which relies on secondary
DAI presence.

This patch fixes following kernel warning:
samsung-i2s 3830000.i2s: ASoC: Failed to create component debugfs directory
samsung-i2s 3830000.i2s: ASoC: Failed to create component debugfs directory
------------[ cut here ]------------
WARNING: CPU: 3 PID: 82 at fs/proc/generic.c:330 proc_register+0xec/0x10c
proc_dir_entry 'sub0/prealloc' already registered
Modules linked in:
CPU: 3 PID: 82 Comm: kworker/3:1 Not tainted 4.14.0-rc5-next-20171017 #3089
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
Workqueue: events deferred_probe_work_func
[<c0110114>] (unwind_backtrace) from [<c010c900>] (show_stack+0x10/0x14)
[<c010c900>] (show_stack) from [<c083e664>] (dump_stack+0x90/0xc8)
[<c083e664>] (dump_stack) from [<c011d2b8>] (__warn+0xd4/0x100)
[<c011d2b8>] (__warn) from [<c011d384>] (warn_slowpath_fmt+0x38/0x48)
[<c011d384>] (warn_slowpath_fmt) from [<c0271268>] (proc_register+0xec/0x10c)
[<c0271268>] (proc_register) from [<c027130c>] (proc_create_data+0x84/0xc8)
[<c027130c>] (proc_create_data) from [<c061afbc>] (snd_info_register+0x64/0xcc)
[<c061afbc>] (snd_info_register) from [<c062a6e0>] (snd_pcm_lib_preallocate_pages1+0x78/0x1a0)
[<c062a6e0>] (snd_pcm_lib_preallocate_pages1) from [<c063eef4>] (dmaengine_pcm_new+0xa0/0x1ec)
[<c063eef4>] (dmaengine_pcm_new) from [<c062b9f8>] (snd_soc_platform_drv_pcm_new+0x1c/0x28)
[<c062b9f8>] (snd_soc_platform_drv_pcm_new) from [<c063d54c>] (soc_new_pcm+0x2f4/0x4f4)
[<c063d54c>] (soc_new_pcm) from [<c063107c>] (snd_soc_register_card+0xc4c/0xdc4)
[<c063107c>] (snd_soc_register_card) from [<c063db30>] (devm_snd_soc_register_card+0x34/0x70)
[<c063db30>] (devm_snd_soc_register_card) from [<c064af60>] (asoc_simple_card_probe+0x230/0x47c)
[<c064af60>] (asoc_simple_card_probe) from [<c047f8fc>] (platform_drv_probe+0x50/0xb0)
[<c047f8fc>] (platform_drv_probe) from [<c047dee0>] (driver_probe_device+0x2a0/0x46c)
[<c047dee0>] (driver_probe_device) from [<c047c0bc>] (bus_for_each_drv+0x44/0x8c)
[<c047c0bc>] (bus_for_each_drv) from [<c047db50>] (__device_attach+0xa0/0x134)
[<c047db50>] (__device_attach) from [<c047cf7c>] (bus_probe_device+0x88/0x90)
[<c047cf7c>] (bus_probe_device) from [<c047d484>] (deferred_probe_work_func+0x3c/0x168)
[<c047d484>] (deferred_probe_work_func) from [<c01371f8>] (process_one_work+0x188/0x41c)
[<c01371f8>] (process_one_work) from [<c01374b4>] (process_scheduled_works+0x28/0x38)
[<c01374b4>] (process_scheduled_works) from [<c01376d4>] (worker_thread+0x210/0x4dc)
[<c01376d4>] (worker_thread) from [<c013d9cc>] (kthread+0x128/0x164)
[<c013d9cc>] (kthread) from [<c0108848>] (ret_from_fork+0x14/0x2c)
---[ end trace bad8db6ee771d094 ]--

Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
---
 sound/soc/samsung/i2s.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 8d5e1861abb1..233f1c9a4b6c 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -1292,6 +1292,7 @@ static int samsung_i2s_probe(struct platform_device *pdev)
 			}
 		}
 	}
+	quirks &= ~(QUIRK_SEC_DAI | QUIRK_SUPPORTS_IDMA);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	pri_dai->addr = devm_ioremap_resource(&pdev->dev, res);
-- 
2.14.2