From b20f3b834673be9ead83a3c6f07fa3881d1a990f Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 2 Jun 2009 01:20:22 +0200
Subject: [PATCH] ALSA: hda - Limit codec-verb retry to limited hardwares
The reset of a BUS controller during operations is somehow risky and
shouldn't be done inevitably for devices that have apparently no such
codec-communication problems.
This patch adds the check of the hardware and limits the bus-reset
capability.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/hda/hda_codec.c | 12 ++----------
sound/pci/hda/hda_codec.h | 3 +++
sound/pci/hda/hda_intel.c | 2 +-
sound/pci/hda/patch_sigmatel.c | 9 +++++++++
4 files changed, 15 insertions(+), 11 deletions(-)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index aa0e1c18b606..562403a23488 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -214,11 +214,6 @@ unsigned int snd_hda_codec_read(struct hda_codec *codec, hda_nid_t nid,
}
EXPORT_SYMBOL_HDA(snd_hda_codec_read);
-/* Define the below to send and receive verbs synchronously.
- * If you often get any codec communication errors, this is worth to try.
- */
-/* #define SND_HDA_SUPPORT_SYNC_WRITE */
-
/**
* snd_hda_codec_write - send a single command without waiting for response
* @codec: the HDA codec
@@ -235,12 +230,9 @@ int snd_hda_codec_write(struct hda_codec *codec, hda_nid_t nid, int direct,
unsigned int verb, unsigned int parm)
{
unsigned int cmd = make_codec_cmd(codec, nid, direct, verb, parm);
-#ifdef SND_HDA_SUPPORT_SYNC_WRITE
unsigned int res;
- return codec_exec_verb(codec, cmd, &res);
-#else
- return codec_exec_verb(codec, cmd, NULL);
-#endif
+ return codec_exec_verb(codec, cmd,
+ codec->bus->sync_write ? &res : NULL);
}
EXPORT_SYMBOL_HDA(snd_hda_codec_write);
diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h
index f5fa5d1f223c..cad79efaabc9 100644
--- a/sound/pci/hda/hda_codec.h
+++ b/sound/pci/hda/hda_codec.h
@@ -624,6 +624,9 @@ struct hda_bus {
/* misc op flags */
unsigned int needs_damn_long_delay :1;
+ unsigned int allow_bus_reset:1; /* allow bus reset at fatal error */
+ unsigned int sync_write:1; /* sync after verb write */
+ /* status for codec/controller */
unsigned int shutdown :1; /* being unloaded */
unsigned int rirb_error:1; /* error in codec communication */
unsigned int response_reset:1; /* controller was reset */
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 44f9a0aa20c5..9f44645a1d04 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -665,7 +665,7 @@ static unsigned int azx_rirb_get_response(struct hda_bus *bus)
* to the single_cmd mode
*/
bus->rirb_error = 1;
- if (!bus->response_reset && !bus->in_reset) {
+ if (bus->allow_bus_reset && !bus->response_reset && !bus->in_reset) {
bus->response_reset = 1;
return -1; /* give a chance to retry */
}
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 48f4a36c4813..42f944bb641d 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -5375,6 +5375,15 @@ again:
if (get_wcaps(codec, 0xa) & AC_WCAP_IN_AMP)
snd_hda_sequence_write_cache(codec, unmute_init);
+ /* Some HP machines seem to have unstable codec communications
+ * especially with ATI fglrx driver. For recovering from the
+ * CORB/RIRB stall, allow the BUS reset and keep always sync
+ */
+ if (spec->board_config == STAC_HP_DV5) {
+ codec->bus->sync_write = 1;
+ codec->bus->allow_bus_reset = 1;
+ }
+
spec->aloopback_ctl = stac92hd71bxx_loopback;
spec->aloopback_mask = 0x50;
spec->aloopback_shift = 0;