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thunderbolt: Handle bandwidth allocation mode disable request

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Graphics can disable DisplayPort bandwidth allocation mode as well so if
this make sure to reset the tunnel state accordingly.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg 2023-12-28 16:47:39 +02:00
parent d44b9827e7
commit c7857ee68e
1 changed files with 16 additions and 6 deletions
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22
drivers/thunderbolt/tb.c
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@ -2406,8 +2406,23 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work)
tb_port_dbg(in, "handling bandwidth allocation request\n");
tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL);
if (!tunnel) {
tb_port_warn(in, "failed to find tunnel\n");
goto put_sw;
}
if (!usb4_dp_port_bandwidth_mode_enabled(in)) {
tb_port_warn(in, "bandwidth allocation mode not enabled\n");
if (tunnel->bw_mode) {
/*
* Reset the tunnel back to use the legacy
* allocation.
*/
tunnel->bw_mode = false;
tb_port_dbg(in, "DPTX disabled bandwidth allocation mode\n");
} else {
tb_port_warn(in, "bandwidth allocation mode not enabled\n");
}
goto put_sw;
}
@ -2432,11 +2447,6 @@ static void tb_handle_dp_bandwidth_request(struct work_struct *work)
tb_port_dbg(in, "requested bandwidth %d Mb/s\n", requested_bw);
tunnel = tb_find_tunnel(tb, TB_TUNNEL_DP, in, NULL);
if (!tunnel) {
tb_port_warn(in, "failed to find tunnel\n");
goto put_sw;
}
out = tunnel->dst_port;