From mboxrd@z Thu Jan 1 00:00:00 1970 From: eric@anholt.net (Eric Anholt) Date: Thu, 16 Mar 2017 11:13:12 -0700 Subject: [PATCH v2 2/3] drm/vc4: Add HDMI audio support In-Reply-To: <20170227202803.12855-2-eric@anholt.net> References: <20170227202803.12855-1-eric@anholt.net> <20170227202803.12855-2-eric@anholt.net> Message-ID: <87tw6tyts7.fsf@eliezer.anholt.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Eric Anholt writes: > The HDMI encoder IP embeds all needed blocks to output audio, with a > custom DAI called MAI moving audio between the two parts of the HDMI > core. This driver now exposes a sound card to let users stream audio > to their display. > > Using the hdmi-codec driver has been considered here, but MAI meant > having to significantly rework hdmi-codec, and it would have left > little shared code with the I2S mode anyway. > > The encoder requires that the audio be SPDIF-formatted frames only, > which alsalib will format-convert for us. > > This patch is the combined work of Eric Anholt (initial register setup > with a separate dmaengine driver and using simple-audio-card) and > Boris Brezillon (moving it all into HDMI, massive debug to get it > actually working), and which Eric has the permission to release. > > v2: Drop "-audio" from sound card name, since that's already implied > (suggestion by Boris) On IRC, Mark Brown disclaimed responsibility for reviewing this code, so I've merged it to drm-misc-next. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 832 bytes Desc: not available URL: