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389c06cf84
[ Upstream commit a75e0684ef ]
If a DiplayPort cable is directly connected to the host routers USB4
port, there is no tunnel involved but the port is in "redrive" mode
meaning that it is re-driving the DisplayPort signals from its
DisplayPort source. In this case we need to keep the domain powered on
otherwise once the domain enters D3cold the connected monitor blanks
too.
Since this happens only on Intel Barlow Ridge add a quirk that takes
runtime PM reference if we detect that the USB4 port entered redrive
mode (and release it once it exits the mode).
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Thunderbolt driver - quirks
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*
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* Copyright (c) 2020 Mario Limonciello <mario.limonciello@dell.com>
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*/
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#include "tb.h"
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static void quirk_force_power_link(struct tb_switch *sw)
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{
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sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER;
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tb_sw_dbg(sw, "forcing power to link controller\n");
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}
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static void quirk_dp_credit_allocation(struct tb_switch *sw)
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{
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if (sw->credit_allocation && sw->min_dp_main_credits == 56) {
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sw->min_dp_main_credits = 18;
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tb_sw_dbg(sw, "quirked DP main: %u\n", sw->min_dp_main_credits);
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}
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}
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static void quirk_clx_disable(struct tb_switch *sw)
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{
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sw->quirks |= QUIRK_NO_CLX;
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tb_sw_dbg(sw, "disabling CL states\n");
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}
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static void quirk_usb3_maximum_bandwidth(struct tb_switch *sw)
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{
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struct tb_port *port;
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if (tb_switch_is_icm(sw))
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return;
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tb_switch_for_each_port(sw, port) {
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if (!tb_port_is_usb3_down(port))
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continue;
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port->max_bw = 16376;
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tb_port_dbg(port, "USB3 maximum bandwidth limited to %u Mb/s\n",
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port->max_bw);
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}
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}
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static void quirk_block_rpm_in_redrive(struct tb_switch *sw)
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{
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sw->quirks |= QUIRK_KEEP_POWER_IN_DP_REDRIVE;
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tb_sw_dbg(sw, "preventing runtime PM in DP redrive mode\n");
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}
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struct tb_quirk {
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u16 hw_vendor_id;
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u16 hw_device_id;
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u16 vendor;
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u16 device;
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void (*hook)(struct tb_switch *sw);
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};
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static const struct tb_quirk tb_quirks[] = {
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/* Dell WD19TB supports self-authentication on unplug */
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{ 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
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{ 0x0000, 0x0000, 0x00d4, 0xb071, quirk_force_power_link },
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/*
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* Intel Goshen Ridge NVM 27 and before report wrong number of
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* DP buffers.
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*/
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{ 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
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/*
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* Limit the maximum USB3 bandwidth for the following Intel USB4
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* host routers due to a hardware issue.
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*/
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{ 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI0, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_ADL_NHI1, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI0, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_RPL_NHI1, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_MTL_M_NHI0, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI0, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_MTL_P_NHI1, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_80G_BRIDGE, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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{ 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HUB_40G_BRIDGE, 0x0000, 0x0000,
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quirk_usb3_maximum_bandwidth },
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/*
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* Block Runtime PM in DP redrive mode for Intel Barlow Ridge host
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* controllers.
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*/
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{ 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_80G_NHI, 0x0000, 0x0000,
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quirk_block_rpm_in_redrive },
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{ 0x8087, PCI_DEVICE_ID_INTEL_BARLOW_RIDGE_HOST_40G_NHI, 0x0000, 0x0000,
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quirk_block_rpm_in_redrive },
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/*
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* CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
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*/
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{ 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
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{ 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
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{ 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
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{ 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
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};
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/**
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* tb_check_quirks() - Check for quirks to apply
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* @sw: Thunderbolt switch
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*
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* Apply any quirks for the Thunderbolt controller.
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*/
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void tb_check_quirks(struct tb_switch *sw)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
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const struct tb_quirk *q = &tb_quirks[i];
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if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
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continue;
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if (q->hw_device_id && q->hw_device_id != sw->config.device_id)
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continue;
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if (q->vendor && q->vendor != sw->vendor)
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continue;
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if (q->device && q->device != sw->device)
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continue;
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tb_sw_dbg(sw, "running %ps\n", q->hook);
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q->hook(sw);
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}
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}
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