From: Kai Vehmanen kai.vehmanen@linux.intel.com

[ Upstream commit ca76282b6faffc83601c25bd2a95f635c03503ef ]

A race exists between build_pcms() and build_controls() phases of codec setup. Build_pcms() sets up notifier for jack events. If a monitor event is received before build_controls() is run, the initial jack state is lost and never reported via mixer controls.

The problem can be hit at least with SOF as the controller driver. SOF calls snd_hda_codec_build_controls() in its workqueue-based probe and this can be delayed enough to hit the race condition.

Fix the issue by invalidating the per-pin ELD information when build_controls() is called. The existing call to hdmi_present_sense() will update the ELD contents. This ensures initial monitor state is correctly reflected via mixer controls.

BugLink: https://github.com/thesofproject/linux/issues/1687 Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com Link: https://lore.kernel.org/r/20200428123836.24512-1-kai.vehmanen@linux.intel.co... Signed-off-by: Takashi Iwai tiwai@suse.de Signed-off-by: Sasha Levin sashal@kernel.org --- sound/pci/hda/patch_hdmi.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index f1febfc47ba60..4493427f324e4 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2232,7 +2232,9 @@ static int generic_hdmi_build_controls(struct hda_codec *codec)

for (pin_idx = 0; pin_idx < spec->num_pins; pin_idx++) { struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx); + struct hdmi_eld *pin_eld = &per_pin->sink_eld;

+ pin_eld->eld_valid = false; hdmi_present_sense(per_pin, 0); }