xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ALSA: hda - Limit codec-verb retry to limited hardwares

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

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);