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Subject[PATCH 1/8] ASoC: Intel: Skylake: Remove superfluous chip initialization
Date
commit 2ef81057d80456870b97890dd79c8f56a85b1242 upstream.

Skylake driver does the controller init operation twice:
- first during probe (only to stop it just before scheduling probe_work)
- and during said probe_work where the actual correct sequence is
executed

To properly complete boot sequence when iDisp codec is present, bus
initialization has to be called only after _i915_init() finishes.
With additional _reset_list preceding _i915_init(), iDisp codec never
gets the chance to enumerate on the link. Remove the superfluous
initialization to address the issue.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200305145314.32579-2-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org> # 5.4.x
---
sound/soc/intel/skylake/skl.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/sound/soc/intel/skylake/skl.c b/sound/soc/intel/skylake/skl.c
index 141dbbf975ac..861c07417fed 100644
--- a/sound/soc/intel/skylake/skl.c
+++ b/sound/soc/intel/skylake/skl.c
@@ -807,6 +807,9 @@ static void skl_probe_work(struct work_struct *work)
return;
}

+ skl_init_pci(skl);
+ skl_dum_set(bus);
+
err = skl_init_chip(bus, true);
if (err < 0) {
dev_err(bus->dev, "Init chip failed with err: %d\n", err);
@@ -922,8 +925,6 @@ static int skl_first_init(struct hdac_bus *bus)
return -ENXIO;
}

- snd_hdac_bus_reset_link(bus, true);
-
snd_hdac_bus_parse_capabilities(bus);

/* check if PPCAP exists */
@@ -971,11 +972,7 @@ static int skl_first_init(struct hdac_bus *bus)
if (err < 0)
return err;

- /* initialize chip */
- skl_init_pci(skl);
- skl_dum_set(bus);
-
- return skl_init_chip(bus, true);
+ return 0;
}

static int skl_probe(struct pci_dev *pci,
@@ -1080,8 +1077,6 @@ static int skl_probe(struct pci_dev *pci,
if (bus->mlcap)
snd_hdac_ext_bus_get_ml_capabilities(bus);

- snd_hdac_bus_stop_chip(bus);
-
/* create device for soc dmic */
err = skl_dmic_device_register(skl);
if (err < 0) {
--
2.17.1
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