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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>
This commit is contained in:
Takashi Iwai 2009-06-02 01:20:22 +02:00
parent 8dd783304e
commit b20f3b8346
4 changed files with 15 additions and 11 deletions
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12
sound/pci/hda/hda_codec.c
View File

@ -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);

3
sound/pci/hda/hda_codec.h
View File

@ -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 */

2
sound/pci/hda/hda_intel.c
View File

@ -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 */
}

9
sound/pci/hda/patch_sigmatel.c
View File

@ -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;