TechPanelGM/kernel_xiaomi_sm8250
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bt: Unset multi channel bit for 44.1/88.2Khz A2DP Rx

Browse Source 
When opening port for 44.1/88.2KHz A2DP Rx, explicitly
unset multi channel bit. This is required because for SCO/A2DP
with other sample rates, we set the multi channel bit. The
bit remains set even after the channel is removed and until we
expliciltly unset again.

Change-Id: I76d7a46b107baf811657b7ade307a7dd60a21c4a
Signed-off-by: gaoxiang <quic_gaoxiang@quicinc.com>
This commit is contained in:
gaoxiang
2023-09-27 18:52:29 +08:00
committed by Jiayang Mao
parent de59b74d74
commit ce3ab0ecae
1 changed files with 17 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/bluetooth/btfm_slim_slave.c
View File

@@ -81,14 +81,12 @@ int btfm_slim_slave_enable_port(struct btfmslim *btfmslim, uint8_t port_num,
uint8_t reg_val = 0, en;
uint8_t rxport_num = 0;
uint16_t reg;
uint8_t prev_reg_val = 0;
BTFMSLIM_DBG("port(%d) enable(%d)", port_num, enable);
if (rxport) {
BTFMSLIM_DBG("sample rate is %d", btfmslim->sample_rate);
if (enable &&
btfmslim->sample_rate != 44100 &&
btfmslim->sample_rate != 88200) {
BTFMSLIM_DBG("setting multichannel bit");
if (enable) {
/* For SCO Rx, A2DP Rx other than 44.1 and 88.2Khz */
if (port_num < 24) {
rxport_num = port_num - 16;
@@ -102,6 +100,21 @@ int btfm_slim_slave_enable_port(struct btfmslim *btfmslim, uint8_t port_num,
rxport_num);
}
if (btfmslim->sample_rate == 44100 ||
btfmslim->sample_rate == 88200) {
BTFMSLIM_DBG("unsetting multichannel bit");
ret = btfm_slim_read(btfmslim, reg, 1,
&prev_reg_val, IFD);
if (ret < 0) {
BTFMSLIM_ERR("error %d reading", ret);
prev_reg_val = 0;
}
BTFMSLIM_DBG("prev_reg_val (%d) from reg(%x)",
prev_reg_val, reg);
reg_val = prev_reg_val & ~reg_val;
} else
BTFMSLIM_DBG("setting multichannel bit");
BTFMSLIM_DBG("writing reg_val (%d) to reg(%x)",
reg_val, reg);
ret = btfm_slim_write(btfmslim, reg, 1, &reg_val, IFD);