From: Gustavo Sousa Date: Thu, 27 Feb 2025 19:14:25 +0000 (-0300) Subject: drm/i915/xe3lpd: Map POWER_DOMAIN_AUDIO_PLAYBACK to DC_off X-Git-Tag: v6.16-rc1~33^2~29^2~144 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=eb4796d8625902adfd0bc7226306afcde617f7c9;p=linux-block.git drm/i915/xe3lpd: Map POWER_DOMAIN_AUDIO_PLAYBACK to DC_off In Xe3_LPD, display audio has the core audio logic located in PG0 and per-transcoder logic in the same power well that provides power for the transcoder [1]. For stuff like audio device enumeration, we need to ensure that PG0 is turned on. For playback, we additionally need the transcoder's power well to be enabled. That essentially means that, for audio playback, there isn't a special power well that needs to be enabled, because modeset sequences will ensure that the required power wells are enabled. That said, there might be cases where PG0 could be disabled due to display entering DC6 while the audio driver tries to interact with the graphics driver for stuff like audio device enumeration. We recently hit that kind of scenario, where "aplay -l" was being used to enumerate audio devices on a PTL machine with PSR enabled and no external displays attached. Since intel_audio_component_get_power() uses POWER_DOMAIN_AUDIO_PLAYBACK, make sure to map that power domain to DC_off power well, so that we disable dynamic DC states (which includes DC6) while the audio driver needs display audio power. [1] The core-audio vs per-transcoder logic split is not really new in Xe3_LPD. This is also true for previous display generations. We need to figure out the correct version where this split happened so that we can apply fixes in the current power domain mapping. Bspec: 72519 Reviewed-by: Kai Vehmanen Link: https://patchwork.freedesktop.org/patch/msgid/20250227-xe3lpd-power-domain-audio-playback-v1-1-5765f21da977@intel.com Signed-off-by: Gustavo Sousa --- diff --git a/drivers/gpu/drm/i915/display/intel_display_power_map.c b/drivers/gpu/drm/i915/display/intel_display_power_map.c index e80e1fd611ca..ab1163744bc5 100644 --- a/drivers/gpu/drm/i915/display/intel_display_power_map.c +++ b/drivers/gpu/drm/i915/display/intel_display_power_map.c @@ -1696,6 +1696,7 @@ I915_DECL_PW_DOMAINS(xe3lpd_pwdoms_dc_off, XE3LPD_PW_C_POWER_DOMAINS, XE3LPD_PW_D_POWER_DOMAINS, POWER_DOMAIN_AUDIO_MMIO, + POWER_DOMAIN_AUDIO_PLAYBACK, POWER_DOMAIN_INIT); static const struct i915_power_well_desc xe3lpd_power_wells_dcoff[] = {