* [PATCH] ALSA: hda/hdmi: Consider ELD is invalid when no SAD is present
@ 2021-12-02 7:33 Kai-Heng Feng
2021-12-02 8:03 ` Takashi Iwai
0 siblings, 1 reply; 2+ messages in thread
From: Kai-Heng Feng @ 2021-12-02 7:33 UTC (permalink / raw)
To: tiwai
Cc: Kai-Heng Feng, Jaroslav Kysela, Kai Vehmanen,
Guennadi Liakhovetski, Ranjani Sridharan, Hui Wang, alsa-devel,
linux-kernel
There's a system that reports a bogus HDMI audio interface:
$ cat eld#2.0
monitor_present 1
eld_valid 1
monitor_name
connection_type DisplayPort
eld_version [0x2] CEA-861D or below
edid_version [0x3] CEA-861-B, C or D
manufacture_id 0xe430
product_id 0x690
port_id 0x0
support_hdcp 0
support_ai 0
audio_sync_delay 0
speakers [0xffff] FL/FR LFE FC RL/RR RC FLC/FRC RLC/RRC FLW/FRW FLH/FRH TC FCH
sad_count 0
Since playing audio is not possible without SAD, also consider ELD is
invalid for this case.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
---
sound/pci/hda/patch_hdmi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 415701bd10ac8..e7c2f3167f311 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1535,7 +1535,7 @@ static void update_eld(struct hda_codec *codec,
}
}
- if (!eld->eld_valid || eld->eld_size <= 0) {
+ if (!eld->eld_valid || eld->eld_size <= 0 || eld->info.sad_count <= 0) {
eld->eld_valid = false;
eld->eld_size = 0;
}
--
2.32.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] ALSA: hda/hdmi: Consider ELD is invalid when no SAD is present
2021-12-02 7:33 [PATCH] ALSA: hda/hdmi: Consider ELD is invalid when no SAD is present Kai-Heng Feng
@ 2021-12-02 8:03 ` Takashi Iwai
0 siblings, 0 replies; 2+ messages in thread
From: Takashi Iwai @ 2021-12-02 8:03 UTC (permalink / raw)
To: Kai-Heng Feng
Cc: tiwai, Jaroslav Kysela, Kai Vehmanen, Guennadi Liakhovetski,
Ranjani Sridharan, Hui Wang, alsa-devel, linux-kernel
On Thu, 02 Dec 2021 08:33:35 +0100,
Kai-Heng Feng wrote:
>
> There's a system that reports a bogus HDMI audio interface:
> $ cat eld#2.0
> monitor_present 1
> eld_valid 1
> monitor_name
> connection_type DisplayPort
> eld_version [0x2] CEA-861D or below
> edid_version [0x3] CEA-861-B, C or D
> manufacture_id 0xe430
> product_id 0x690
> port_id 0x0
> support_hdcp 0
> support_ai 0
> audio_sync_delay 0
> speakers [0xffff] FL/FR LFE FC RL/RR RC FLC/FRC RLC/RRC FLW/FRW FLH/FRH TC FCH
> sad_count 0
>
> Since playing audio is not possible without SAD, also consider ELD is
> invalid for this case.
>
> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Thanks, applied.
Takashi
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