From: Mark Brown <broonie@kernel.org>
To: Daniel Vetter <daniel@ffwll.ch>
Cc: Fabio Estevam <fabio.estevam@freescale.com>,
alsa-devel@alsa-project.org, dri-devel@lists.freedesktop.org,
Yakir Yang <ykk@rock-chips.com>,
Russell King <rmk+kernel@arm.linux.org.uk>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 13/13] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver
Date: Wed, 27 May 2015 12:43:33 +0100 [thread overview]
Message-ID: <20150527114333.GD21577@sirena.org.uk> (raw)
In-Reply-To: <20150527104308.GA8341@phenom.ffwll.local>
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On Wed, May 27, 2015 at 12:43:08PM +0200, Daniel Vetter wrote:
> Just curious questions really, I probably don't understand what's exactly
> going on. But I do think that we need a more formal way for drm/snd to
> talk to each another (i915 is growing quite a few hairy things in that
> area outside of eld atm). Problems we have are around shared power wells
Yes, I agree strongly with this - I've been asking for a while for more
code sharing and common code in this path, the helpers in here are
really good from that point of view and I'm very pleased we've got them
applied.
> and clocks (x86 doesn't help here without all the dt goodness). But
> there's also stuff like figuring out the right dividers for a given
> audio/video clock. eld and hotplug is still done in hw, but I've heard
> noises that we need to have a sw approach too on some platforms at least.
That seems to be the case, yes - FWIW quite a few of the embedded
systems are basically connecting a standard S/PDIF or I2S output to a
HDMI encoder chip or IP block so the audio controller knows nothing of
HDMI directly.
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From: broonie@kernel.org (Mark Brown)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 13/13] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver
Date: Wed, 27 May 2015 12:43:33 +0100 [thread overview]
Message-ID: <20150527114333.GD21577@sirena.org.uk> (raw)
In-Reply-To: <20150527104308.GA8341@phenom.ffwll.local>
On Wed, May 27, 2015 at 12:43:08PM +0200, Daniel Vetter wrote:
> Just curious questions really, I probably don't understand what's exactly
> going on. But I do think that we need a more formal way for drm/snd to
> talk to each another (i915 is growing quite a few hairy things in that
> area outside of eld atm). Problems we have are around shared power wells
Yes, I agree strongly with this - I've been asking for a while for more
code sharing and common code in this path, the helpers in here are
really good from that point of view and I'm very pleased we've got them
applied.
> and clocks (x86 doesn't help here without all the dt goodness). But
> there's also stuff like figuring out the right dividers for a given
> audio/video clock. eld and hotplug is still done in hw, but I've heard
> noises that we need to have a sw approach too on some platforms at least.
That seems to be the case, yes - FWIW quite a few of the embedded
systems are basically connecting a standard S/PDIF or I2S output to a
HDMI encoder chip or IP block so the audio controller knows nothing of
HDMI directly.
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next prev parent reply other threads:[~2015-05-27 11:43 UTC|newest]
Thread overview: 148+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 9:20 [RFC v2 0/13] dw_hdmi cleanups, audio preparation, helpers and ahb audio support Russell King - ARM Linux
2015-04-02 9:20 ` Russell King - ARM Linux
2015-04-02 9:21 ` [PATCH RFC v2 01/13] drm: imx/dw_hdmi: move phy comments Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 02/13] drm: bridge/dw_hdmi: clean up phy configuration Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 03/13] drm: bridge/dw_hdmi: clean up hdmi_set_clk_regenerator() Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 04/13] drm: bridge/dw_hdmi: use drm_hdmi_avi_infoframe_from_display_mode() Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 05/13] drm: bridge/dw_hdmi: simplify hdmi_config_AVI() a little Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 06/13] drm: bridge/dw_hdmi: remove mhsyncpolarity/mvsyncpolarity/minterlaced Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 07/13] drm: bridge/dw_hdmi: introduce interface to setting sample rate Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:21 ` [PATCH RFC v2 08/13] drm: bridge/dw_hdmi: introduce interfaces to enable and disable audio Russell King
2015-04-02 9:21 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 09/13] drm/edid: add function to help find SADs Russell King
2015-04-02 9:22 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 10/13] sound/core: add DRM ELD helper Russell King
2015-04-02 9:22 ` Russell King
2015-04-05 15:57 ` Takashi Iwai
2015-04-05 15:57 ` Takashi Iwai
2015-04-05 16:20 ` Russell King - ARM Linux
2015-04-05 16:20 ` Russell King - ARM Linux
2015-04-05 16:46 ` Takashi Iwai
2015-04-05 16:46 ` Takashi Iwai
2015-04-05 17:26 ` Russell King - ARM Linux
2015-04-05 17:26 ` Russell King - ARM Linux
2015-05-06 17:02 ` Anssi Hannula
2015-05-06 17:02 ` Anssi Hannula
2015-05-07 10:41 ` Russell King - ARM Linux
2015-05-07 10:41 ` Russell King - ARM Linux
2015-05-07 11:11 ` Lars-Peter Clausen
2015-05-07 11:11 ` [alsa-devel] " Lars-Peter Clausen
2015-05-08 10:56 ` Jyri Sarha
2015-05-08 10:56 ` Jyri Sarha
2015-05-08 11:42 ` Russell King - ARM Linux
2015-05-08 11:42 ` Russell King - ARM Linux
2015-05-05 22:35 ` Mark Brown
2015-05-05 22:35 ` Mark Brown
2015-05-06 8:58 ` Liam Girdwood
2015-05-06 8:58 ` [alsa-devel] " Liam Girdwood
2015-05-08 13:16 ` Jyri Sarha
2015-05-08 13:16 ` Jyri Sarha
2015-05-08 13:27 ` Russell King - ARM Linux
2015-05-08 13:27 ` Russell King - ARM Linux
2015-05-08 13:37 ` Jyri Sarha
2015-05-08 13:37 ` [alsa-devel] " Jyri Sarha
2015-04-02 9:22 ` [PATCH RFC v2 11/13] sound/core: add IEC958 channel status helper Russell King
2015-04-02 9:22 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King
2015-04-02 9:22 ` Russell King
2015-04-02 9:22 ` [PATCH RFC v2 13/13] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver Russell King
2015-04-02 9:22 ` Russell King
2015-05-09 10:25 ` [PATCH v3 0/13] dw_hdmi cleanups, audio preparation, helpers and ahb audio support Russell King - ARM Linux
2015-05-09 10:25 ` Russell King - ARM Linux
2015-05-09 10:25 ` [PATCH 01/13] drm: imx/dw_hdmi: move phy comments Russell King
2015-05-09 10:25 ` Russell King
2015-05-09 10:26 ` [PATCH 02/13] drm: bridge/dw_hdmi: clean up phy configuration Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:19 ` Yakir
2015-05-22 15:19 ` Yakir
2015-05-09 10:26 ` [PATCH 03/13] drm: bridge/dw_hdmi: clean up hdmi_set_clk_regenerator() Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:22 ` Yakir
2015-05-22 15:22 ` Yakir
2015-05-09 10:26 ` [PATCH 04/13] drm: bridge/dw_hdmi: use drm_hdmi_avi_infoframe_from_display_mode() Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 05/13] drm: bridge/dw_hdmi: simplify hdmi_config_AVI() a little Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 06/13] drm: bridge/dw_hdmi: remove mhsyncpolarity/mvsyncpolarity/minterlaced Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 07/13] drm: bridge/dw_hdmi: introduce interface to setting sample rate Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:26 ` Yakir
2015-05-22 15:26 ` Yakir
2015-05-09 10:26 ` [PATCH 08/13] drm: bridge/dw_hdmi: introduce interfaces to enable and disable audio Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 15:28 ` Yakir
2015-05-22 15:28 ` Yakir
2015-05-09 10:26 ` [PATCH 09/13] drm/edid: add function to help find SADs Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 10:26 ` [PATCH 10/13] sound/core: add DRM ELD helper Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 12:20 ` [alsa-devel] " Mark Brown
2015-05-22 12:20 ` Mark Brown
2015-05-22 13:15 ` Russell King - ARM Linux
2015-05-22 13:15 ` Russell King - ARM Linux
2015-05-22 13:30 ` Takashi Iwai
2015-05-22 13:30 ` Takashi Iwai
2015-05-22 13:53 ` Russell King - ARM Linux
2015-05-22 13:53 ` Russell King - ARM Linux
2015-05-22 13:54 ` Takashi Iwai
2015-05-22 13:54 ` Takashi Iwai
2015-05-22 14:00 ` Russell King - ARM Linux
2015-05-22 14:00 ` Russell King - ARM Linux
2015-05-22 14:02 ` Takashi Iwai
2015-05-22 14:02 ` Takashi Iwai
2015-05-22 14:05 ` Takashi Iwai
2015-05-22 14:05 ` Takashi Iwai
2015-05-22 16:12 ` Russell King - ARM Linux
2015-05-22 16:12 ` Russell King - ARM Linux
2015-05-09 10:26 ` [PATCH 11/13] sound/core: add IEC958 channel status helper Russell King
2015-05-09 10:26 ` Russell King
2015-05-22 12:40 ` Mark Brown
2015-05-22 12:40 ` Mark Brown
2015-05-09 10:26 ` [PATCH 12/13] drm: bridge/dw_hdmi-ahb-audio: add audio driver Russell King
2015-05-09 10:26 ` Russell King
2015-05-09 16:49 ` [alsa-devel] " Anssi Hannula
2015-05-09 16:49 ` Anssi Hannula
2015-05-09 16:55 ` Russell King - ARM Linux
2015-05-09 16:55 ` Russell King - ARM Linux
2015-05-09 17:07 ` Anssi Hannula
2015-05-09 17:07 ` Anssi Hannula
2015-05-09 17:40 ` Russell King - ARM Linux
2015-05-09 17:40 ` Russell King - ARM Linux
2015-05-09 17:53 ` Russell King - ARM Linux
2015-05-09 17:53 ` Russell King - ARM Linux
2015-05-09 17:55 ` Anssi Hannula
2015-05-09 17:55 ` Anssi Hannula
2015-05-09 18:11 ` Russell King - ARM Linux
2015-05-09 18:11 ` Russell King - ARM Linux
2015-05-10 18:59 ` Anssi Hannula
2015-05-10 18:59 ` Anssi Hannula
2015-05-10 19:33 ` Russell King - ARM Linux
2015-05-10 19:33 ` Russell King - ARM Linux
2015-05-10 20:47 ` Anssi Hannula
2015-05-10 20:47 ` Anssi Hannula
2015-05-11 15:58 ` Mark Brown
2015-05-11 15:58 ` [alsa-devel] " Mark Brown
2015-05-09 10:26 ` [PATCH 13/13] drm: bridge/dw_hdmi-ahb-audio: parse ELD from HDMI driver Russell King
2015-05-09 10:26 ` Russell King
2015-05-27 10:43 ` Daniel Vetter
2015-05-27 10:43 ` Daniel Vetter
2015-05-27 11:43 ` Mark Brown [this message]
2015-05-27 11:43 ` Mark Brown
2015-05-27 17:31 ` Russell King - ARM Linux
2015-05-27 17:31 ` Russell King - ARM Linux
2015-05-27 21:29 ` Daniel Vetter
2015-05-27 21:29 ` Daniel Vetter
2015-05-27 21:44 ` Russell King - ARM Linux
2015-05-27 21:44 ` Russell King - ARM Linux
2015-05-28 6:43 ` Daniel Vetter
2015-05-28 6:43 ` Daniel Vetter
2015-05-28 4:56 ` [alsa-devel] " Takashi Iwai
2015-05-28 4:56 ` Takashi Iwai
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