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thunderbolt: Add quirk to disable CLx

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Add QUIRK_NO_CLX to disable the CLx state for hardware which
doesn't supports it.

AMD Yellow Carp and Pink Sardine don't support CLx state,
hence disabling it using QUIRK_NO_CLX.

Cc: stable@vger.kernel.org
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
[mw: added debug log when the quirk is run]
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Sanjay R Mehta 2023-02-14 13:13:50 -06:00 committed by Mika Westerberg
parent fe15c26ee2
commit 7af9da8ce8
2 changed files with 21 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

13
drivers/thunderbolt/quirks.c
View file

@ -20,6 +20,12 @@ static void quirk_dp_credit_allocation(struct tb_switch *sw)
}
}
static void quirk_clx_disable(struct tb_switch *sw)
{
sw->quirks |= QUIRK_NO_CLX;
tb_sw_dbg(sw, "disabling CL states\n");
}
struct tb_quirk {
u16 hw_vendor_id;
u16 hw_device_id;
@ -37,6 +43,13 @@ static const struct tb_quirk tb_quirks[] = {
* DP buffers.
*/
{ 0x8087, 0x0b26, 0x0000, 0x0000, quirk_dp_credit_allocation },
/*
* CLx is not supported on AMD USB4 Yellow Carp and Pink Sardine platforms.
*/
{ 0x0438, 0x0208, 0x0000, 0x0000, quirk_clx_disable },
{ 0x0438, 0x0209, 0x0000, 0x0000, quirk_clx_disable },
{ 0x0438, 0x020a, 0x0000, 0x0000, quirk_clx_disable },
{ 0x0438, 0x020b, 0x0000, 0x0000, quirk_clx_disable },
};
/**

11
drivers/thunderbolt/tb.h
View file

@ -23,6 +23,11 @@
#define NVM_MAX_SIZE SZ_512K
#define NVM_DATA_DWORDS 16
/* Keep link controller awake during update */
#define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0)
/* Disable CLx if not supported */
#define QUIRK_NO_CLX BIT(1)
/**
* struct tb_nvm - Structure holding NVM information
* @dev: Owner of the NVM
@ -1019,6 +1024,9 @@ static inline bool tb_switch_is_clx_enabled(const struct tb_switch *sw,
*/
static inline bool tb_switch_is_clx_supported(const struct tb_switch *sw)
{
if (sw->quirks & QUIRK_NO_CLX)
return false;
return tb_switch_is_usb4(sw) || tb_switch_is_titan_ridge(sw);
}
@ -1291,9 +1299,6 @@ struct usb4_port *usb4_port_device_add(struct tb_port *port);
void usb4_port_device_remove(struct usb4_port *usb4);
int usb4_port_device_resume(struct usb4_port *usb4);
/* Keep link controller awake during update */
#define QUIRK_FORCE_POWER_LINK_CONTROLLER BIT(0)
void tb_check_quirks(struct tb_switch *sw);
#ifdef CONFIG_ACPI