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1cb36293 ML |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Thunderbolt driver - quirks | |
4 | * | |
5 | * Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com> | |
6 | */ | |
7 | ||
8 | #include "tb.h" | |
9 | ||
10 | static void quirk_force_power_link(struct tb_switch *sw) | |
11 | { | |
12 | sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER; | |
13 | } | |
14 | ||
7c37bb30 MW |
15 | static void quirk_dp_credit_allocation(struct tb_switch *sw) |
16 | { | |
17 | if (sw->credit_allocation && sw->min_dp_main_credits == 56) { | |
18 | sw->min_dp_main_credits = 18; | |
19 | tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits); | |
20 | } | |
21 | } | |
22 | ||
1cb36293 | 23 | struct tb_quirk { |
7c37bb30 MW |
24 | u16 hw_vendor_id; |
25 | u16 hw_device_id; | |
1cb36293 ML |
26 | u16 vendor; |
27 | u16 device; | |
28 | void (*hook)(struct tb_switch *sw); | |
29 | }; | |
30 | ||
ef7e1207 | 31 | static const struct tb_quirk tb_quirks[] = { |
1cb36293 | 32 | /* Dell WD19TB supports self-authentication on unplug */ |
7c37bb30 MW |
33 | { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link }, |
34 | { 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link }, | |
35 | /* | |
36 | * Intel Goshen Ridge NVM 27 and before report wrong number of | |
37 | * DP buffers. | |
38 | */ | |
39 | { 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation }, | |
1cb36293 ML |
40 | }; |
41 | ||
42 | /** | |
43 | * tb_check_quirks() - Check for quirks to apply | |
44 | * @sw: Thunderbolt switch | |
45 | * | |
9c8cac6a | 46 | * Apply any quirks for the Thunderbolt controller. |
1cb36293 ML |
47 | */ |
48 | void tb_check_quirks(struct tb_switch *sw) | |
49 | { | |
50 | int i; | |
51 | ||
52 | for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) { | |
53 | const struct tb_quirk *q = &tb_quirks[i]; | |
54 | ||
7c37bb30 MW |
55 | if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id) |
56 | continue; | |
57 | if (q->hw_device_id && q->hw_device_id != sw->config.device_id) | |
58 | continue; | |
59 | if (q->vendor && q->vendor != sw->vendor) | |
60 | continue; | |
61 | if (q->device && q->device != sw->device) | |
62 | continue; | |
63 | ||
64 | q->hook(sw); | |
1cb36293 ML |
65 | } |
66 | } |