From: Dom Cobley <dom@raspberrypi.com>
To: nicolas saenz julienne <nsaenz@kernel.org>
Cc: alsa-devel@alsa-project.org,
Tim Gover <tim.gover@raspberrypi.com>,
linux-doc@vger.kernel.org, David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org, Takashi Iwai <tiwai@suse.com>,
Eric Anholt <eric@anholt.net>,
Daniel Vetter <daniel.vetter@intel.com>,
Phil Elwell <phil@raspberrypi.com>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
bcm-kernel-feedback-list@broadcom.com,
devicetree@vger.kernel.org, Daniel Vetter <daniel@ffwll.ch>,
Liam Girdwood <lgirdwood@gmail.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Mark Brown <broonie@kernel.org>,
Maxime Ripard <maxime@cerno.tech>,
Dom Cobley <popcornmix@gmail.com>,
linux-arm-kernel@lists.infradead.org,
Jonathan Corbet <corbet@lwn.net>,
linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH v2 09/12] drm/vc4: hdmi: Remove firmware logic for MAI threshold setting
Date: Tue, 1 Jun 2021 11:01:37 +0100 [thread overview]
Message-ID: <CANUESCF8wpZzv4yEODk+J8gt2div=3Zsgt7S0yoPSb2XN=2RsQ@mail.gmail.com> (raw)
In-Reply-To: <813942f4864d87ef0b9c5dff98c23c919bdd88a9.camel@kernel.org>
On Tue, 1 Jun 2021 at 09:52, nicolas saenz julienne <nsaenz@kernel.org>
wrote:
> What's to expect sound wise on older RPis?
I'd say 8 channel 48kHz is good. 2 channel 192KHz is good.
Higher than that and we start to lose samples in the HDMI MAI bus fifo.
The firmware workaround made 4 channel 192kHz somewhat more reliable, but
it would still fail when sdram was busy,
so I don't think it's worth maintaining that.
WARNING: multiple messages have this Message-ID (diff)
From: Dom Cobley <dom@raspberrypi.com>
To: nicolas saenz julienne <nsaenz@kernel.org>
Cc: alsa-devel@alsa-project.org,
Tim Gover <tim.gover@raspberrypi.com>,
linux-doc@vger.kernel.org, David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org, Takashi Iwai <tiwai@suse.com>,
Daniel Vetter <daniel.vetter@intel.com>,
Phil Elwell <phil@raspberrypi.com>,
Dave Stevenson <dave.stevenson@raspberrypi.com>,
bcm-kernel-feedback-list@broadcom.com,
devicetree@vger.kernel.org, Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
Maxime Ripard <maxime@cerno.tech>,
Dom Cobley <popcornmix@gmail.com>,
Jaroslav Kysela <perex@perex.cz>,
linux-arm-kernel@lists.infradead.org,
Jonathan Corbet <corbet@lwn.net>,
linux-kernel@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
linux-rpi-kernel@lists.infradead.org
Subject: Re: [PATCH v2 09/12] drm/vc4: hdmi: Remove firmware logic for MAI threshold setting
Date: Tue, 1 Jun 2021 11:01:37 +0100 [thread overview]
Message-ID: <CANUESCF8wpZzv4yEODk+J8gt2div=3Zsgt7S0yoPSb2XN=2RsQ@mail.gmail.com> (raw)
In-Reply-To: <813942f4864d87ef0b9c5dff98c23c919bdd88a9.camel@kernel.org>
[-- Attachment #1: Type: text/plain, Size: 420 bytes --]
On Tue, 1 Jun 2021 at 09:52, nicolas saenz julienne <nsaenz@kernel.org>
wrote:
> What's to expect sound wise on older RPis?
I'd say 8 channel 48kHz is good. 2 channel 192KHz is good.
Higher than that and we start to lose samples in the HDMI MAI bus fifo.
The firmware workaround made 4 channel 192kHz somewhat more reliable, but
it would still fail when sdram was busy,
so I don't think it's worth maintaining that.
[-- Attachment #2: Type: text/html, Size: 824 bytes --]
next prev parent reply other threads:[~2021-06-02 14:26 UTC|newest]
Thread overview: 130+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-25 13:23 [PATCH v2 00/12] drm/vc4: hdmi: Enable Channel Mapping, IEC958, HBR Passthrough using hdmi-codec Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` [PATCH v2 01/12] ALSA: doc: Clarify IEC958 controls iface Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 15:58 ` Takashi Iwai
2021-05-25 15:58 ` Takashi Iwai
2021-05-25 15:58 ` Takashi Iwai
2021-05-25 15:58 ` Takashi Iwai
2021-05-25 13:23 ` [PATCH v2 02/12] ALSA: iec958: Split status creation and fill Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 16:01 ` Takashi Iwai
2021-05-25 16:01 ` Takashi Iwai
2021-05-25 16:01 ` Takashi Iwai
2021-05-25 16:01 ` Takashi Iwai
2021-05-25 13:23 ` [PATCH v2 03/12] ASoC: hdmi-codec: Rework to support more controls Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-26 10:38 ` Mark Brown
2021-05-26 10:38 ` Mark Brown
2021-05-26 10:38 ` Mark Brown
2021-05-26 10:38 ` Mark Brown
2021-05-25 13:23 ` [PATCH v2 04/12] ASoC: hdmi-codec: Add iec958 controls Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-26 10:38 ` Mark Brown
2021-05-26 10:38 ` Mark Brown
2021-05-26 10:38 ` Mark Brown
2021-05-26 10:38 ` Mark Brown
2021-06-09 12:43 ` Mark Brown
2021-06-09 12:43 ` Mark Brown
2021-06-09 12:43 ` Mark Brown
2021-06-09 12:43 ` Mark Brown
2021-06-10 12:26 ` Maxime Ripard
2021-06-10 12:26 ` Maxime Ripard
2021-06-10 12:26 ` Maxime Ripard
2021-06-10 12:26 ` Maxime Ripard
2021-05-25 13:23 ` [PATCH v2 05/12] ASoC: hdmi-codec: Add a prepare hook Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-26 10:39 ` Mark Brown
2021-05-26 10:39 ` Mark Brown
2021-05-26 10:39 ` Mark Brown
2021-05-26 10:39 ` Mark Brown
2021-05-31 9:42 ` Maxime Ripard
2021-05-31 9:42 ` Maxime Ripard
2021-05-31 9:42 ` Maxime Ripard
2021-05-31 9:42 ` Maxime Ripard
2021-05-31 11:12 ` Takashi Iwai
2021-05-31 11:12 ` Takashi Iwai
2021-05-31 11:12 ` Takashi Iwai
2021-05-31 11:12 ` Takashi Iwai
2021-06-01 12:36 ` Mark Brown
2021-06-01 12:36 ` Mark Brown
2021-06-01 12:36 ` Mark Brown
2021-06-01 12:36 ` Mark Brown
2021-06-03 8:18 ` Maxime Ripard
2021-06-03 8:18 ` Maxime Ripard
2021-06-03 8:18 ` Maxime Ripard
2021-06-03 8:18 ` Maxime Ripard
2021-05-25 13:23 ` [PATCH v2 06/12] drm/vc4: hdmi: Set HD_CTL_WHOLSMP and HD_CTL_CHALIGN_SET Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-06-01 8:45 ` nicolas saenz julienne
2021-06-01 8:45 ` nicolas saenz julienne
2021-06-01 8:45 ` nicolas saenz julienne
2021-06-01 8:45 ` nicolas saenz julienne
2021-05-25 13:23 ` [PATCH v2 07/12] drm/vc4: hdmi: Set HDMI_MAI_FMT Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-06-01 8:47 ` nicolas saenz julienne
2021-06-01 8:47 ` nicolas saenz julienne
2021-06-01 8:47 ` nicolas saenz julienne
2021-06-01 8:47 ` nicolas saenz julienne
2021-05-25 13:23 ` [PATCH v2 08/12] drm/vc4: hdmi: Set VC4_HDMI_MAI_CONFIG_FORMAT_REVERSE Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-06-01 8:49 ` nicolas saenz julienne
2021-06-01 8:49 ` nicolas saenz julienne
2021-06-01 8:49 ` nicolas saenz julienne
2021-06-01 8:49 ` nicolas saenz julienne
2021-05-25 13:23 ` [PATCH v2 09/12] drm/vc4: hdmi: Remove firmware logic for MAI threshold setting Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-06-01 8:52 ` nicolas saenz julienne
2021-06-01 8:52 ` nicolas saenz julienne
2021-06-01 8:52 ` nicolas saenz julienne
2021-06-01 8:52 ` nicolas saenz julienne
2021-06-01 10:01 ` Dom Cobley [this message]
2021-06-01 10:01 ` Dom Cobley
2021-05-25 13:23 ` [PATCH v2 10/12] drm/vc4: hdmi: Register HDMI codec Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-06-01 9:26 ` nicolas saenz julienne
2021-06-01 9:26 ` nicolas saenz julienne
2021-06-01 9:26 ` nicolas saenz julienne
2021-06-01 9:26 ` nicolas saenz julienne
2021-06-23 12:29 ` Maxime Ripard
2021-06-23 12:29 ` Maxime Ripard
2021-06-23 12:29 ` Maxime Ripard
2021-06-23 12:29 ` Maxime Ripard
2021-05-25 13:23 ` [PATCH v2 11/12] drm/vc4: hdmi: Remove redundant variables Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-06-01 9:30 ` nicolas saenz julienne
2021-06-01 9:30 ` nicolas saenz julienne
2021-06-01 9:30 ` nicolas saenz julienne
2021-06-01 9:30 ` nicolas saenz julienne
2021-05-25 13:23 ` [PATCH v2 12/12] ARM: dts: bcm2711: Tune DMA parameters for HDMI audio Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 13:23 ` Maxime Ripard
2021-05-25 15:25 ` Florian Fainelli
2021-05-25 15:25 ` Florian Fainelli
2021-05-25 15:25 ` Florian Fainelli
2021-05-25 15:25 ` Florian Fainelli
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