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authorYu Zhao <yuzhao@google.com>2018-09-11 15:15:16 -0600
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-10-18 09:16:22 +0200
commit37ca1cc8d4c021c8fe79e070ca7bc2fd26ed1530 (patch)
treea1aa56870aef9455eebff8cd4bda1d8dfdf7d854
parent2af2b70c107b8a2e75e3c3351f3777e8cf26229c (diff)
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sound: don't call skl_init_chip() to reset intel skl soc
[ Upstream commit 75383f8d39d4c0fb96083dd460b7b139fbdac492 ] Internally, skl_init_chip() calls snd_hdac_bus_init_chip() which 1) sets bus->chip_init to prevent multiple entrances before device is stopped; 2) enables interrupt. We shouldn't use it for the purpose of resetting device only because 1) when we really want to initialize device, we won't be able to do so; 2) we are ready to handle interrupt yet, and kernel crashes when interrupt comes in. Rename azx_reset() to snd_hdac_bus_reset_link(), and use it to reset device properly. Fixes: 60767abcea3d ("ASoC: Intel: Skylake: Reset the controller in probe") Reviewed-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Yu Zhao <yuzhao@google.com> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--include/sound/hdaudio.h1
-rw-r--r--sound/hda/hdac_controller.c7
-rw-r--r--sound/soc/intel/skylake/skl.c2
3 files changed, 6 insertions, 4 deletions
diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index d8afd8a5bd76..926ea701cdc4 100644
--- a/include/sound/hdaudio.h
+++ b/include/sound/hdaudio.h
@@ -357,6 +357,7 @@ void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
+int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 6da6f3b8a623..778b42ba90b8 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -384,7 +384,7 @@ void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus)
EXPORT_SYMBOL_GPL(snd_hdac_bus_exit_link_reset);
/* reset codec link */
-static int azx_reset(struct hdac_bus *bus, bool full_reset)
+int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset)
{
if (!full_reset)
goto skip_reset;
@@ -409,7 +409,7 @@ static int azx_reset(struct hdac_bus *bus, bool full_reset)
skip_reset:
/* check to see if controller is ready */
if (!snd_hdac_chip_readb(bus, GCTL)) {
- dev_dbg(bus->dev, "azx_reset: controller not ready!\n");
+ dev_dbg(bus->dev, "controller not ready!\n");
return -EBUSY;
}
@@ -424,6 +424,7 @@ static int azx_reset(struct hdac_bus *bus, bool full_reset)
return 0;
}
+EXPORT_SYMBOL_GPL(snd_hdac_bus_reset_link);
/* enable interrupts */
static void azx_int_enable(struct hdac_bus *bus)
@@ -478,7 +479,7 @@ bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset)
return false;
/* reset controller */
- azx_reset(bus, full_reset);
+ snd_hdac_bus_reset_link(bus, full_reset);
/* clear interrupts */
azx_int_clear(bus);
diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index f94b484abb99..a0bef63b8fb1 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -698,7 +698,7 @@ static int skl_first_init(struct hdac_ext_bus *ebus)
return -ENXIO;
}
- skl_init_chip(bus, true);
+ snd_hdac_bus_reset_link(bus, true);
snd_hdac_bus_parse_capabilities(bus);