quirks.c
1.55 KB
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// SPDX-License-Identifier: GPL-2.0
/*
* Thunderbolt driver - quirks
*
* Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com>
*/
#include "tb.h"
static void quirk_force_power_link(struct tb_switch *sw)
{
sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER;
}
static void quirk_dp_credit_allocation(struct tb_switch *sw)
{
if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
sw->min_dp_main_credits = 18;
tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
}
}
struct tb_quirk {
u16 hw_vendor_id;
u16 hw_device_id;
u16 vendor;
u16 device;
void (*hook)(struct tb_switch *sw);
};
static const struct tb_quirk tb_quirks[] = {
/* Dell WD19TB supports self-authentication on unplug */
{ 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
{ 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
/*
* Intel Goshen Ridge NVM 27 and before report wrong number of
* DP buffers.
*/
{ 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
};
/**
* tb_check_quirks() - Check for quirks to apply
* @sw: Thunderbolt switch
*
* Apply any quirks for the Thunderbolt controller.
*/
void tb_check_quirks(struct tb_switch *sw)
{
int i;
for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
const struct tb_quirk *q = &tb_quirks[i];
if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
continue;
if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
continue;
if (q->vendor && q->vendor != sw->vendor)
continue;
if (q->device && q->device != sw->device)
continue;
q->hook(sw);
}
}