On Mon, 21 Nov 2011 14:37:49 +0800, Wu Fengguang <fengguang.wu@xxxxxxxxx> 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 use. -- keith.packard@xxxxxxxxx
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