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thunderbolt: Log an error if DPTX request is not cleared

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This helps debugging issues around DisplayPort bandwidth allocation
mode.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg 2023-12-28 16:49:45 +02:00
parent c7857ee68e
commit 2ec67a48cf
1 changed files with 3 additions and 1 deletions
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4
drivers/thunderbolt/usb4.c
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@ -2858,8 +2858,10 @@ static int usb4_dp_port_wait_and_clear_cm_ack(struct tb_port *port,
usleep_range(50, 100);
} while (ktime_before(ktime_get(), end));
if (val & ADP_DP_CS_8_DR)
if (val & ADP_DP_CS_8_DR) {
tb_port_warn(port, "timeout waiting for DPTX request to clear\n");
return -ETIMEDOUT;
}
ret = tb_port_read(port, &val, TB_CFG_PORT,
port->cap_adap + ADP_DP_CS_2, 1);