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Sat, 16 May 2026 07:12:50 -0700 (PDT) From: Francesco Saverio Pavone To: tiwai@suse.de Cc: perex@perex.cz, broonie@kernel.org, linux-sound@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH RESEND] ALSA: pcm_drm_eld: rate-limit ELD parsing errors Date: Sat, 16 May 2026 16:12:44 +0200 Message-ID: <20260516141244.21801-1-pavone.lawyer@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <87zf1zy22e.wl-tiwai@suse.de> References: <87zf1zy22e.wl-tiwai@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Mirror of Mark Brown's ASoC: hdac_hdmi rate-limit patch (commit [lkml.kernel.org/lkml/2025/6/13/1380]) for the generic snd_parse_eld() helper used by ASoC hdmi-codec. When a HDMI sink is disconnected (e.g. a board with two HDMI outputs and only one cable), userspace audio servers like PipeWire keep probing the disconnected card and trigger: HDMI: Unknown ELD version 0 at every probe =E2=80=94 easily 30+ messages per burst on rk3588. The same applies to malformed ELD (MNL out of range). Both conditions are expected when no sink is attached; rate-limit the dev_info() so the kernel ring buffer does not fill up. Signed-off-by: Francesco Saverio Pavone --- 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 =3D GRAB_BITS(buf, 0, 3, 5); if (e->eld_ver !=3D ELD_VER_CEA_861D && e->eld_ver !=3D 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; } =20 @@ -357,7 +357,7 @@ int snd_parse_eld(struct device *dev, struct snd_parsed= _hdmi_eld *e, e->product_id =3D get_unaligned_le16(buf + 18); =20 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); --=20 2.54.0