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sb/intel/lynxpoint/hda_verb.c: Add missing codec detect steps 

Lynx Point reference code version 1.9.1 and soc/intel/common/hda_verb.c
perform these steps. Add them to Lynx Point as well. With this change,
Lynx Point and soc/intel/common hda_verb.c files are now identical.

Change-Id: I2fc592f73697a43bd5a3315ac80c77ff9f00da9b
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51642
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
This commit is contained in:
Angel Pons 2021-03-18 17:09:49 +01:00
parent aa566ad07f
commit f20ef65e65
1 changed files with 14 additions and 1 deletions
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15
src/southbridge/intel/lynxpoint/hda_verb.c
View File

@ -5,7 +5,6 @@
#include <device/mmio.h>
#include <delay.h>
#include "pch.h"
#include "hda_verb.h"
int hda_codec_detect(u8 *base)
@ -19,6 +18,20 @@ 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 (azalia_enter_reset(base) < 0)
goto no_codec;
/* Turn on the link and poll RESET# bit until it reads back as 1 */
if (azalia_exit_reset(base) < 0)
goto no_codec;
/* Read in Codec location (BAR + 0xe)[2..0] */
reg8 = read8(base + HDA_STATESTS_REG);
reg8 &= 0x0f;