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>

diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h
index d8afd8a..926ea70 100644 (file)
--- 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 6da6f3b..778b42b 100644 (file)
--- 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 f94b484..a0bef63 100644 (file)
--- 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);