On Thu, Nov 10, 2011 at 03:33:50PM +0800, Wu Fengguang wrote:
> Wow I reproduced the bug and got a very interesting dmesg:
>
> gfx => [ 4561.287980] [drm:intel_write_eld], ELD on
> [CONNECTOR:12:HDMI-A-2], [ENCODER:11:TMDS-11]
> gfx => [ 4561.291730] [drm:ironlake_write_eld], ELD on pipe B
> gfx => [ 4561.293804] [drm:ironlake_write_eld], Audio directed to
> unknown port
> gfx => [ 4561.295273] [drm:ironlake_write_eld],
> alsa => [ 4561.295486] HDMI hot plug event: Codec=3 Pin=6
> Presence_Detect=1 ELD_Valid=0
> alsa => [ 4561.295564] HDMI status: Codec=3 Pin=6 Presence_Detect=1
> ELD_Valid=0
> gfx => [ 4561.300020] ELD size 13
> alsa => [ 4561.300697] HDMI hot plug event: Codec=3 Pin=6
> Presence_Detect=1 ELD_Valid=1
> alsa => [ 4561.303322] HDMI status: Codec=3 Pin=6 Presence_Detect=1
> ELD_Valid=1
> alsa => [ 4561.311120] ALSA hda_eld.c:259 HDMI: Unknown ELD version 0
>
> Hey the two parts are interleaved!
>
> But still it should work all fine, since the gfx driver does
>
> set ELD_Valid = 0
> write ELD
> set ELD_Valid = 1
>
> So the audio driver would read the correct ELD unless the ELD content
> and flag writes are somehow _reordered_ underneath. Or the ELD content
> writes take some time to take effect?
Just confirmed that adding 1s delay can fix it!
New dmesg is:
[ 48.564923] [drm:drm_crtc_helper_set_mode], [ENCODER:11:TMDS-11] set
[MODE:34:]
[ 48.567481] [drm:intel_hdmi_mode_set], Enabling HDMI audio on pipe B
[ 48.568975] [drm:intel_write_eld], ELD on [CONNECTOR:12:HDMI-A-2],
[ENCODER:11:TMDS-11]
[ 48.571728] [drm:ironlake_write_eld], ELD on pipe B
[ 48.572882] [drm:ironlake_write_eld], Audio directed to unknown port
[ 48.575252] [drm:ironlake_write_eld],
[ 48.575400] HDMI hot plug event: Codec=3 Pin=6 Presence_Detect=1 ELD_Valid=0
[ 48.575487] HDMI status: Codec=3 Pin=6 Presence_Detect=1 ELD_Valid=0
[ 48.580116] ELD size 13
[ 48.580795] HDMI hot plug event: Codec=3 Pin=6 Presence_Detect=1 ELD_Valid=1
[ 48.583340] HDMI status: Codec=3 Pin=6 Presence_Detect=1 ELD_Valid=1
[ 48.632514] [drm:intel_wait_for_vblank], vblank wait timed out
[ 48.685322] [drm:intel_wait_for_vblank], vblank wait timed out
[ 48.687438] [drm:ironlake_update_wm], FIFO watermarks For pipe A - plane 5,
cursor: 6
[ 48.687438] [drm:ironlake_update_wm], FIFO watermarks For pipe A - plane 5,
cursor: 6
[ 48.690106] [drm:ironlake_update_wm], FIFO watermarks For pipe B - plane 42,
cursor: 6
[ 48.745204] [drm:intel_wait_for_vblank], vblank wait timed out
[ 48.798035] [drm:intel_wait_for_vblank], vblank wait timed out
[ 48.799633] [drm:ironlake_fdi_link_train], FDI_RX_IIR 0x100
[ 48.802686] [drm:ironlake_fdi_link_train], FDI train 1 done.
[ 48.805103] [drm:ironlake_fdi_link_train], FDI_RX_IIR 0x600
[ 48.807246] [drm:ironlake_fdi_link_train], FDI train 2 done.
[ 48.809426] [drm:ironlake_fdi_link_train], FDI train done
[ 48.813960] [drm:intel_update_fbc],
[ 48.814782] [drm:drm_crtc_helper_set_config], Setting connector DPMS state
to on
[ 48.818093] [drm:drm_crtc_helper_set_config], [CONNECTOR:12:HDMI-A-2]
set DPMS on
[ 48.828633] [drm:intel_prepare_page_flip], preparing flip with no unpin work?
[ 49.618962] HDMI: detected monitor RX-V1800 at connection type HDMI
[ 49.621013] HDMI: available speakers: FL/FR LFE FC RL/RR RC RLC/RRC
[ 49.622304] HDMI: supports coding type LPCM: channels = 2, rates = 32000
44100 48000 96000 176400 192000 384000, bits = 16 20 24
[ 49.625069] HDMI: supports coding type LPCM: channels = 8, rates = 32000
44100 48000 96000 176400 192000 384000, bits = 16 20 24
[ 49.628535] HDMI: supports coding type AC-3: channels = 6, rates = 32000
44100 48000, max bitrate = 640000
[ 49.630810] HDMI: supports coding type DTS: channels = 7, rates = 32000
44100 48000 96000 176400, max bitrate = 1536000
[ 49.633148] HDMI: supports coding type DSD (One Bit Audio): channels = 6,
rates = 44100
[ 49.635039] HDMI: supports coding type E-AC-3/DD+ (Dolby Digital Plus):
channels = 8, rates = 44100 48000
[ 49.637130] HDMI: supports coding type MLP (Dolby TrueHD): channels = 8,
rates = 48000 176400 384000
[ 49.639172] HDMI: supports coding type DTS-HD: channels = 8, rates = 48000
176400 384000
Thanks,
Fengguang
Subject:
Date: Thu Nov 10 15:41:11 CST 2011
Signed-off-by: Wu Fengguang <fengguang...@intel.com>
---
sound/pci/hda/hda_eld.c | 3 +++
1 file changed, 3 insertions(+)
--- linux.orig/sound/pci/hda/hda_eld.c 2011-11-10 15:39:43.000000000 +0800
+++ linux/sound/pci/hda/hda_eld.c 2011-11-10 15:52:09.000000000 +0800
@@ -23,6 +23,7 @@
#include <linux/init.h>
#include <linux/slab.h>
+#include <linux/delay.h>
#include <sound/core.h>
#include <asm/unaligned.h>
#include "hda_codec.h"
@@ -326,6 +327,8 @@ int snd_hdmi_get_eld(struct hdmi_eld *el
if (!eld->eld_valid)
return -ENOENT;
+ msleep(1000);
+
size = snd_hdmi_get_eld_size(codec, nid);
if (size == 0) {
/* wfg: workaround for ASUS P5E-VM HDMI board */
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