diff options
Diffstat (limited to 'src/soc/intel/common/hda_verb.c')
| -rw-r--r-- | src/soc/intel/common/hda_verb.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/soc/intel/common/hda_verb.c b/src/soc/intel/common/hda_verb.c index bd61ceeca4..2523b41000 100644 --- a/src/soc/intel/common/hda_verb.c +++ b/src/soc/intel/common/hda_verb.c @@ -70,6 +70,19 @@ int hda_codec_detect(u8 *base) /* Write back the value once reset bit is set. */ write16(base + HDA_GCAP_REG, read16(base + HDA_GCAP_REG)); + /* Clear the "State Change Status Register" STATESTS bits + * for each of the "SDIN Stat Change Status Flag" + */ + write8(base + HDA_STATESTS_REG, 0xf); + + /* Turn off the link and poll RESET# bit until it reads back as 0 */ + if (set_bits(base + HDA_GCTL_REG, HDA_GCTL_CRST, ~HDA_GCTL_CRST) < 0) + goto no_codec; + + /* Turn on the link and poll RESET# bit until it reads back as 1 */ + if (set_bits(base + HDA_GCTL_REG, HDA_GCTL_CRST, HDA_GCTL_CRST) < 0) + goto no_codec; + /* Read in Codec location (BAR + 0xe)[2..0]*/ reg8 = read8(base + HDA_STATESTS_REG); reg8 &= 0x0f; |