[lkml]   [2011]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH 3/3 v2] drm/i915: hot plug/unplug notification to HDMI audio driver
On Mon, 21 Nov 2011 14:37:49 +0800, Wu Fengguang <> wrote:
> 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.
> 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.
> 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

[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2011-11-21 17:57    [W:0.075 / U:1.300 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site