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sound: don't call skl_init_chip() to reset intel skl soc 

[ Upstream commit 75383f8d39 ]

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: 60767abcea ("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>
pull/10/head
Yu Zhao 2018-09-11 15:15:16 -06:00 committed by Greg Kroah-Hartman
parent 2af2b70c10
commit 37ca1cc8d4
3 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/sound/hdaudio.h
View File

@ -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,

7
sound/hda/hdac_controller.c
View File

@ -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);

2
sound/soc/intel/skylake/skl.c
View File

@ -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);