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ALSA: hda - hdmi: Fix missing ELD change event on plug/unplug

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The ELD ALSA control change event is sent by hdmi_present_sense() when
eld_changed is true.

Currently, it is only true when the ELD buffer contents have been
modified. However, the user-visible ELD controls also change to a
zero-length value and back when eld_valid is unset/set, and no event is
currently sent in such cases (such as when unplugging or replugging a
sink).

Fix the code to always set eld_changed if eld_valid value is changed,
and therefore to always send the change event when the user-visible
value changes.

Signed-off-by: Anssi Hannula <anssi.hannula@iki.fi>
Cc: David Henningsson <david.henningsson@canonical.com>
Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Anssi Hannula 2014-10-19 19:25:19 +03:00 committed by Takashi Iwai
parent f0b127fbfd
commit 6acce400d9
1 changed files with 9 additions and 6 deletions
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15
sound/pci/hda/patch_hdmi.c
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@ -1583,19 +1583,22 @@ static bool hdmi_present_sense(struct hdmi_spec_per_pin *per_pin, int repoll)
}
}
if (pin_eld->eld_valid && !eld->eld_valid) {
update_eld = true;
if (pin_eld->eld_valid != eld->eld_valid)
eld_changed = true;
}
if (pin_eld->eld_valid && !eld->eld_valid)
update_eld = true;
if (update_eld) {
bool old_eld_valid = pin_eld->eld_valid;
pin_eld->eld_valid = eld->eld_valid;
eld_changed = pin_eld->eld_size != eld->eld_size ||
if (pin_eld->eld_size != eld->eld_size ||
memcmp(pin_eld->eld_buffer, eld->eld_buffer,
eld->eld_size) != 0;
if (eld_changed)
eld->eld_size) != 0) {
memcpy(pin_eld->eld_buffer, eld->eld_buffer,
eld->eld_size);
eld_changed = true;
}
pin_eld->eld_size = eld->eld_size;
pin_eld->info = eld->info;