<html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <div class="moz-cite-prefix">Am 27.01.21 um 13:23 schrieb Ernst Sjöstrand: </div> <blockquote type="cite" cite="mid:CAD=4a=WiL5m0jJOgEDe9xrM3bsX1Xt+YTtV_WY5_j+sAOEGe=g@mail.gmail.com"> <div dir="ltr"> <div> <div style="font-family:arial,helvetica,sans-serif" class="gmail_default">Just some additional thoughts...</div> </div> <div>The amdgpu driver already supports this as I mentioned, however only for the non-DC codepath.</div> <div>"Set HDMI/DPAudio. Only affects non-DC display handling. The default is -1 (Enabled), set 0 to disabled it."</div> </div> </blockquote> I've added this because I completely reverse engineered this roughly 10 years ago without any hardware documentation. <blockquote type="cite" cite="mid:CAD=4a=WiL5m0jJOgEDe9xrM3bsX1Xt+YTtV_WY5_j+sAOEGe=g@mail.gmail.com"> <div dir="ltr"> <div> </div> <div>Linux doesn't have a good infrastructure to disable sound cards afaik. If someone has 6 displays, do they really need 6 extra sound cards? Minor thing, I know.</div> </div> </blockquote> Well yes, that is intentional :) In general the kernel should expose and manage all available hardware. What you do with that in userspace is a completely different question. Christian. <blockquote type="cite" cite="mid:CAD=4a=WiL5m0jJOgEDe9xrM3bsX1Xt+YTtV_WY5_j+sAOEGe=g@mail.gmail.com"> <div dir="ltr"> <div> </div> <div>It was very easy to do, and didn't feel intrusive. </div> <div></div> <div>//E </div> </div> <div class="gmail_quote"> <div dir="ltr" class="gmail_attr">Den ons 27 jan. 2021 kl 12:11 skrev Christian König <<a href="mailto:ckoenig.leichtzumerken@gmail.com" moz-do-not-send="true">ckoenig.leichtzumerken@gmail.com</a>>: </div> <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Am 26.01.21 um 17:15 schrieb Harry Wentland: > On 2021-01-26 9:51 a.m., Ernst Sjöstrand wrote: >> No problems with amdgpu, but when my headphone port is glitching I >> often end up with some HDMI audio output selected instead. >> > > Wouldn't this be better fixed in the audio management service, like > PulseAudio? It sounds like it's not remembering your preferences > correctly. Yeah agree. A feature like this in a specific hardware driver is justified if it prevents hangs or something similar. But this just sounds like a problem in a higher level of the stack which should be fixed hardware driver independently. Christian. > > Harry > >> It also cleans up the clutter in the audio selection list. >> >> //E >> >> Den tis 26 jan. 2021 kl 15:34 skrev Alex Deucher >> <<a href="mailto:alexdeucher@gmail.com" target="_blank" moz-do-not-send="true">alexdeucher@gmail.com</a> <mailto:<a href="mailto:alexdeucher@gmail.com" target="_blank" moz-do-not-send="true">alexdeucher@gmail.com</a>>>: >> >> On Tue, Jan 26, 2021 at 9:32 AM Ernst Sjöstrand <<a href="mailto:ernstp@gmail.com" target="_blank" moz-do-not-send="true">ernstp@gmail.com</a> >> <mailto:<a href="mailto:ernstp@gmail.com" target="_blank" moz-do-not-send="true">ernstp@gmail.com</a>>> wrote: >> > >> > With the pre-DC path you could set audio=0 to disable audio. >> > This adds a similar feature for the DC path with >> > amdgpu.dcfeaturemask=0x10. >> > >> > Signed-off-by: Ernst Sjöstrand <<a href="mailto:ernstp@gmail.com" target="_blank" moz-do-not-send="true">ernstp@gmail.com</a> >> <mailto:<a href="mailto:ernstp@gmail.com" target="_blank" moz-do-not-send="true">ernstp@gmail.com</a>>> >> >> Is there a reason you want this? I.e., is audio causing problems >> for you? >> >> Alex >> >> > --- >> > drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +++ >> > drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 7 ++++--- >> > drivers/gpu/drm/amd/display/dc/dc.h | 1 + >> > drivers/gpu/drm/amd/include/amd_shared.h | 1 + >> > 4 files changed, 9 insertions(+), 3 deletions(-) >> > >> > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c >> b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c >> > index e490fc2486f7..322d9439b9c2 100644 >> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c >> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c >> > @@ -1013,6 +1013,9 @@ static int amdgpu_dm_init(struct >> amdgpu_device *adev) >> > if (amdgpu_dc_feature_mask & >> DC_DISABLE_FRACTIONAL_PWM_MASK) >> > init_data.flags.disable_fractional_pwm = true; >> > >> > + if (amdgpu_dc_feature_mask & DC_DISABLE_AUDIO) >> > + init_data.flags.disable_audio = true; >> > + >> > init_data.flags.power_down_display_on_boot = true; >> > >> > init_data.soc_bounding_box = adev->dm.soc_bounding_box; >> > diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c >> b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c >> > index 68b65a090d17..4cc0d2308c98 100644 >> > --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c >> > +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c >> > @@ -2141,9 +2141,10 @@ enum dc_status >> resource_map_pool_resources( >> > true); >> > >> > /* TODO: Add check if ASIC support and EDID audio */ >> > - if (!stream->converter_disable_audio && >> > - dc_is_audio_capable_signal(pipe_ctx->stream->signal) && >> > - stream->audio_info.mode_count && >> stream->audio_info.flags.all) { >> > + if (!dc->config.disable_audio && >> > + !stream->converter_disable_audio && >> > + dc_is_audio_capable_signal(pipe_ctx->stream->signal) && >> > + stream->audio_info.mode_count && >> stream->audio_info.flags.all) { >> > pipe_ctx->stream_res.audio = >> find_first_free_audio( >> > &context->res_ctx, pool, >> pipe_ctx->stream_res.stream_enc->id, dc_ctx->dce_version); >> > >> > diff --git a/drivers/gpu/drm/amd/display/dc/dc.h >> b/drivers/gpu/drm/amd/display/dc/dc.h >> > index 71d46ade24e5..2ab6d770c66b 100644 >> > --- a/drivers/gpu/drm/amd/display/dc/dc.h >> > +++ b/drivers/gpu/drm/amd/display/dc/dc.h >> > @@ -297,6 +297,7 @@ struct dc_config { >> > bool multi_mon_pp_mclk_switch; >> > bool disable_dmcu; >> > bool enable_4to1MPC; >> > + bool disable_audio; >> > #if defined(CONFIG_DRM_AMD_DC_DCN) >> > bool clamp_min_dcfclk; >> > #endif >> > diff --git a/drivers/gpu/drm/amd/include/amd_shared.h >> b/drivers/gpu/drm/amd/include/amd_shared.h >> > index 9676016a37ce..7202d816a97e 100644 >> > --- a/drivers/gpu/drm/amd/include/amd_shared.h >> > +++ b/drivers/gpu/drm/amd/include/amd_shared.h >> > @@ -220,6 +220,7 @@ enum DC_FEATURE_MASK { >> > DC_MULTI_MON_PP_MCLK_SWITCH_MASK = 0x2, >> > DC_DISABLE_FRACTIONAL_PWM_MASK = 0x4, >> > DC_PSR_MASK = 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