korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2025-01-19 20:34:20 +08:00
Code Issues Packages Projects Releases Wiki Activity

thunderbolt: Do not program path HopIDs for USB4 routers

Browse Source 
These fields are marked read-only for USB4 routers so do not touch them
in that case. Update the kernel-doc of tb_dp_port_set_hops() to reflect
this too.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg 2021-11-18 09:10:59 +02:00
parent 6cb27a04fb
commit e5bb88e961
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/thunderbolt/switch.c
View File

@ -1322,7 +1322,9 @@ int tb_dp_port_hpd_clear(struct tb_port *port)
* @aux_tx: AUX TX Hop ID
* @aux_rx: AUX RX Hop ID
*
* Programs specified Hop IDs for DP IN/OUT port.
* Programs specified Hop IDs for DP IN/OUT port. Can be called for USB4
* router DP adapters too but does not program the values as the fields
* are read-only.
*/
int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
unsigned int aux_tx, unsigned int aux_rx)
@ -1330,6 +1332,9 @@ int tb_dp_port_set_hops(struct tb_port *port, unsigned int video,
u32 data[2];
int ret;
if (tb_switch_is_usb4(port->sw))
return 0;
ret = tb_port_read(port, data, TB_CFG_PORT,
port->cap_adap + ADP_DP_CS_0, ARRAY_SIZE(data));
if (ret)