Date: Fri, 12 Apr 2002 00:05:21 -0400 From: Colin Perkins <csp@isi.edu> To: freebsd-multimedia@FreeBSD.ORG Subject: Sound on ThinkPad X22 Message-ID: <200204120405.g3C45L59000480@purple.nge.isi.edu>
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Hi,
I've been fighting to get audio working on my ThinkPad X22, running
4.5-STABLE. Seems I finally have success, and I wanted to share the
information with the list for the record.
Stock 4.5-STABLE detects the soundcard, but can't map the IO port
space. The dmesg shows:
pcm0: <Intel 82801CA (ICH3)> irq 5 at device 31.5 on pci0
pcm0: unable to map IO port space
device_probe_and_attach: pcm0 attach returned 6
Applying the patches from PR kern/36716 and i386/36972 and recompiling with
the PCI_ENABLE_IO_MODES option in the kernel config results in:
pcm0: <Intel 82801CA (ICH3)> port 0x18c0-0x18ff,0x1c00-0x1cff irq 5 at device 31.5 on pci0
pcm0: ac97 codec reports dac not ready
pcm0: measured ac97 link rate at 44201 Hz
and non-functional sound. However, this can be fixed by increasing the
delay in sys/dev/sound/pcm/ac97.c as follows:
*** ac97.c.orig Thu Apr 11 14:29:49 2002
--- ac97.c Thu Apr 11 23:30:54 2002
***************
*** 367,373 ****
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
wrcd(codec, AC97_REG_RESET, 0);
! DELAY(100000);
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
i = rdcd(codec, AC97_REG_RESET);
--- 367,373 ----
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
wrcd(codec, AC97_REG_RESET, 0);
! DELAY(400000);
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
i = rdcd(codec, AC97_REG_RESET);
***************
*** 462,468 ****
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
wrcd(codec, AC97_REG_RESET, 0);
! DELAY(100000);
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
i = rdcd(codec, AC97_REG_RESET);
--- 462,468 ----
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
wrcd(codec, AC97_REG_RESET, 0);
! DELAY(400000);
wrcd(codec, AC97_REG_POWER, (codec->flags & AC97_F_EAPD_INV)? 0x8000 : 0x0000);
i = rdcd(codec, AC97_REG_RESET);
and dmesg now shows:
pcm0: <Intel 82801CA (ICH3)> port 0x18c0-0x18ff,0x1c00-0x1cff irq 5 at device 31.5 on pci0
Question for the list: is this increase in the delay parameter likely to
cause problems with other devices? If not, can someone consider committing
the necessary changes?
Cheers,
Colin
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