Re: [PATCH] ALSA: pcm_drm_eld: rate-limit ELD parsing errors

[Takashi Iwai]

On Fri, 15 May 2026 17:58:36 +0200,
Sav wrote:
> 
> From: Sav <62543096+dongioia@xxxxxxxxxxxxxxxxxxxxxxxx>
> 
> snd_parse_eld() is the generic helper used by ASoC hdmi-codec, equivalent
> to the hdac_hdmi parse path Mark Brown rate-limited in
> lkml.kernel.org/lkml/2025/6/13/1380. The same spam shows up here for the
> same reason.
> 
> When a HDMI sink is not connected (for example a board with two HDMI
> outputs and a cable in only one of them), userspace audio servers like
> PipeWire keep opening the empty card. snd_parse_eld() then logs
> 
>     HDMI: Unknown ELD version 0
> 
> on every retry. On rk3588 that easily produces 30+ messages per burst.
> A malformed ELD (MNL out of range) hits the same code path. Neither is
> worth a separate dev_info() per occurrence; switch both to
> dev_info_ratelimited().
> 
> Signed-off-by: Sav <62543096+dongioia@xxxxxxxxxxxxxxxxxxxxxxxx>

Could you use the proper name (a real name or a known identity) and
the mail address for Signed-off-by and From, and resubmit?  It's a
legal requirement for the upstreaming.


thanks,

Takashi

> ---
>  sound/core/pcm_drm_eld.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/core/pcm_drm_eld.c b/sound/core/pcm_drm_eld.c
> index cb2eebaac85f..1941ee520063 100644
> --- a/sound/core/pcm_drm_eld.c
> +++ b/sound/core/pcm_drm_eld.c
> @@ -334,7 +334,7 @@ int snd_parse_eld(struct device *dev, struct snd_parsed_hdmi_eld *e,
>  	e->eld_ver = GRAB_BITS(buf, 0, 3, 5);
>  	if (e->eld_ver != ELD_VER_CEA_861D &&
>  	    e->eld_ver != ELD_VER_PARTIAL) {
> -		dev_info(dev, "HDMI: Unknown ELD version %d\n", e->eld_ver);
> +		dev_info_ratelimited(dev, "HDMI: Unknown ELD version %d\n", e->eld_ver);
>  		goto out_fail;
>  	}
>  
> @@ -357,7 +357,7 @@ int snd_parse_eld(struct device *dev, struct snd_parsed_hdmi_eld *e,
>  	e->product_id	  = get_unaligned_le16(buf + 18);
>  
>  	if (mnl > ELD_MAX_MNL) {
> -		dev_info(dev, "HDMI: MNL is reserved value %d\n", mnl);
> +		dev_info_ratelimited(dev, "HDMI: MNL is reserved value %d\n", mnl);
>  		goto out_fail;
>  	} else if (ELD_FIXED_BYTES + mnl > size) {
>  		dev_info(dev, "HDMI: out of range MNL %d\n", mnl);
> -- 
> 2.54.0
>