From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Packard Subject: Re: [PATCH 3/3 v2] drm/i915: hot plug/unplug notification to HDMI audio driver Date: Mon, 21 Nov 2011 08:55:43 -0800 Message-ID: <86hb1xife8.fsf@sumi.keithp.com> References: <20111121063749.GA23450@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Return-path: In-Reply-To: <20111121063749.GA23450@localhost> Sender: linux-kernel-owner@vger.kernel.org To: Wu Fengguang Cc: Takashi Iwai , "Wang, Zhenyu Z" , "dri-devel@lists.freedesktop.org" , "intel-gfx@lists.freedesktop.org" , LKML List-Id: intel-gfx@lists.freedesktop.org --=-=-= Content-Transfer-Encoding: quoted-printable On Mon, 21 Nov 2011 14:37:49 +0800, Wu Fengguang w= rote: > On monitor hot plug/unplug, update ELD and set/clear SDVO_AUDIO_ENABLE > or DP_AUDIO_OUTPUT_ENABLE accordingly. So that the audio driver will > receive hot plug events and take action to refresh its device state and > ELD contents. >=20 > A new callback ->hotplug() is added to struct drm_connector_funcs which > will be called immediately after ->detect() knowing that the monitor is > either plugged or unplugged. >=20 > It's noticed that X may not call ->mode_set() at monitor hot plug, so it's > necessary to call drm_edid_to_eld() earlier at ->detect() time rather than > in intel_ddc_get_modes(), so that intel_write_eld() can see the new ELD > in ->hotplug. The X environment will eventually call mode_set when the user environment decides to use the monitor. Any audio bits can, and should, await the user's choice of a video mode before choosing the audio format to use. We should not be adding eld information until the monitor is in use. =2D-=20 keith.packard@intel.com --=-=-= Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIVAwUBTsqCkDYtFsjWk68qAQij6A/+P9X96i9kvw2EzL+YuNzDZFsBUPOcX+2o gMGwq4BscA+GQMlAh/zszwSMTLriRwMsQn9E+rpRDRVvefvr3ejqqV8x/bEgtUi4 6kM6Y+Bdm7DwjdgNGtUNmufu2QiKoIic/pjr7vNPvl1meJA8/VuTSGF5jzi6UrPs DRoctHadne5A6/aCgUKwUbfOUewRYvi38DIYPb3/PEaozuSNVq2zH5Z85JtIrfmx Vnt59+CPo8LhbzCg2TbQoMcLf/M0AsWqlbuN1Z6hiIUiQqwmCTf0JIR9UDIKGfuE 8VrhehW0r5IK9wvq435EorH7baDJC1c4LxeENl8WAVMWdDEm9orTQRrmoyYH/Onq C0ddjgNFWOn3Z8HWOBAfCDNdLUAdCQ/rSuzzsWlDO97rijVxGt8FRmuyIo1asM4e lq4pLgvdzAgkRySHq0gwzPj2/ZPwLOCPOQi9FdDFMdd55qnpOkE86B86GzKibl2x huGLgrTVdz5FrS4iMrlpGtd6+QxZ1PPnlPerZXoRryIQOvJTgDq1szCC8qo635lR R81m7d1Rgzt9M4k2/gFR3kJcMezQo8SUZ96t8KW3k2xOHcgeaNNIVAxxiUZe7Vd/ nf6M2nce5fnwSvns4bEhJ5VxD+Wofq3ge+sKF3xe7q4IcCycJbJrDBgwSBfzl+oE AzNxTOQ+MbY= =2U2Q -----END PGP SIGNATURE----- --=-=-=--