[Bug 74861] [hsw] Fast audio playback on Intel Haswell HDMI due to runtime pm

Mon Jun 23 10:01:53 PDT 2014

https://bugzilla.kernel.org/show_bug.cgi?id=74861

Nicolas Pöhlmann <nicolas.poehlmann at hardcoretec.com> changed:

           What    |Removed                     |Added
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                 CC|                            |nicolas.poehlmann at hardcoret
                   |                            |ec.com

--- Comment #35 from Nicolas Pöhlmann <nicolas.poehlmann at hardcoretec.com> ---
I have a similar problem with HDMI Video/Audio output on a Haswell Core i5
Processor with an Intel Mainboard, but the difference for me is that audio
output doesn't work either even if I set i915.disable_power_well=0 and/or
snd_hda_intel.power_save_controller=0 at boottime.

To narrow down what hardware causes the problem I can definitly say that only
i5 processors and (probably) i7 are affected. On a Intel Core i3 audio/video
was working with identical mainboard, kernel configuration and monitor. I
haven't the i3 configuration anymore so I can't post the hardware difference,
but the main difference I saw earlier between an i3 and an i5 is the second
audio "node"/"device". It's not a problem with other VGA cards plugged in,
problem exists with and without them plugged in.

The problem still exists in 3.15.1 even with applied tiwai and/or broonie
subtree sound kernel patches applied. Analog+USB sound output is working
normal.

What makes me thoughtful is the output /proc/asound/card0/codec#0 which reports
no "Default PCM" settings (which is unnormal compared to other systems) and "No
Modem Function Group found" (maybe normal, got this on other working systems).

# cat /proc/asound/card0/eld#0.0
monitor_present        0
eld_valid        0

# cat /proc/asound/card0/eld#0.1
monitor_present        1
eld_valid        1
monitor_name        W2442
connection_type        HDMI
eld_version        [0x2] CEA-861D or below
edid_version        [0x3] CEA-861-B, C or D
manufacture_id        0x6d1e
product_id        0x56cc
port_id            0x0
support_hdcp        0
support_ai        0
audio_sync_delay    0
speakers        [0x1] FL/FR
sad_count        1
sad0_coding_type    [0x1] LPCM
sad0_channels        2
sad0_rates        [0xe0] 32000 44100 48000
sad0_bits        [0xe0000] 16 20 24

# cat /sys/kernel/debug/dri/64/i915_power_domain_info 
Power well/domain         Use count
always-on                 3
  PIPE_A                  1
  TRANSCODER_EDP          0
  PORT_DDI_A_2_LANES      0
  PORT_DDI_A_4_LANES      0
  PORT_DDI_B_2_LANES      0
  PORT_DDI_B_4_LANES      1
  PORT_DDI_C_2_LANES      0
  PORT_DDI_C_4_LANES      0
  PORT_DDI_D_2_LANES      0
  PORT_DDI_D_4_LANES      1
  PORT_CRT                0
  INIT                    0
display                   4
  PIPE_B                  1
  PIPE_C                  0
  PIPE_A_PANEL_FITTER     0
  PIPE_B_PANEL_FITTER     0
  PIPE_C_PANEL_FITTER     0
  TRANSCODER_A            1
  TRANSCODER_B            1
  TRANSCODER_C            0
  PORT_DSI                0
  PORT_OTHER              0
  VGA                     0
  AUDIO                   1
  INIT                    0

# cat /proc/asound/card0/codec#0 
Codec: Intel Haswell HDMI
Address: 0
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x80862807
Subsystem Id: 0x80860101
Revision Id: 0x100000
No Modem Function Group found
Default PCM:
    rates [0x0]:
    bits [0x0]:
    formats [0x0]:
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
  Power states:  D0 D3 CLKSTOP EPSS
  Power: setting=D0, actual=D0, Clock-stop-OK
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x02 [Audio Output] wcaps 0x6611: 8-Channels Digital
  Device: name="HDMI 1", type="HDMI", device=7
  Converter: stream=1, channel=0
  Digital: Enabled GenLevel KAE
  Digital category: 0x2
  IEC Coding Type: 0x0
  PCM:
    rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
    bits [0x1e]: 16 20 24 32
    formats [0x5]: PCM AC3
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x03 [Audio Output] wcaps 0x6611: 8-Channels Digital
  Converter: stream=0, channel=0
  Digital: Enabled KAE
  Digital category: 0x0
  IEC Coding Type: 0x0
  PCM:
    rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
    bits [0x1e]: 16 20 24 32
    formats [0x5]: PCM AC3
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x04 [Audio Output] wcaps 0x6611: 8-Channels Digital
  Converter: stream=0, channel=0
  Digital: Enabled KAE
  Digital category: 0x0
  IEC Coding Type: 0x0
  PCM:
    rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
    bits [0x1e]: 16 20 24 32
    formats [0x5]: PCM AC3
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
Node 0x05 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0b000094: OUT Detect HBR HDMI DP
  Pin Default 0x58560010: [N/A] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x1, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=00, enabled=0
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
  Devices: 0
  Connection: 3
     0x02 0x03* 0x04
Node 0x06 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
  Control: name="HDMI/DP,pcm=3 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=0, device=0
  Control: name="IEC958 Playback Pro Mask", index=0, device=0
  Control: name="IEC958 Playback Default", index=0, device=0
  Control: name="IEC958 Playback Switch", index=0, device=0
  Control: name="ELD", index=0, device=3
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0b000094: OUT Detect HBR HDMI DP
  Pin Default 0x18560020: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x2, Sequence = 0x0
  Pin-ctls: 0x00:
  Unsolicited: tag=01, enabled=1
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
  Devices: 0
  Connection: 0
  In-driver Connection: 3
     0x02 0x03 0x04
Node 0x07 [Pin Complex] wcaps 0x40778d: 8-Channels Digital Amp-Out CP
  Control: name="HDMI/DP,pcm=7 Jack", index=0, device=0
  Control: name="IEC958 Playback Con Mask", index=1, device=0
  Control: name="IEC958 Playback Pro Mask", index=1, device=0
  Control: name="IEC958 Playback Default", index=1, device=0
  Control: name="IEC958 Playback Switch", index=1, device=0
  Control: name="ELD", index=0, device=7
  Amp-Out caps: ofs=0x00, nsteps=0x00, stepsize=0x00, mute=1
  Amp-Out vals:  [0x00 0x00]
  Pincap 0x0b000094: OUT Detect HBR HDMI DP
  Pin Default 0x18560030: [Jack] Digital Out at Int HDMI
    Conn = Digital, Color = Unknown
    DefAssociation = 0x3, Sequence = 0x0
  Pin-ctls: 0x40: OUT
  Unsolicited: tag=02, enabled=1
  Power states:  D0 D3 EPSS
  Power: setting=D0, actual=D0
  Devices: 0
  Connection: 3
     0x02* 0x03 0x04
Node 0x08 [Vendor Defined Widget] wcaps 0xf00000: Mono

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