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thunderbolt: Add quirk for Intel Goshen Ridge DP credits

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Intel Goshen Ridge reports wrong DP main credits in NVM 27 and earlier,
so add a quirk that fixes it. We also need to expand the quirk table to
match on hardware vendor/device IDs too.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
This commit is contained in:
Mika Westerberg 2021-03-23 19:05:23 +02:00
parent 6ed541c53e
commit 7c37bb304f
1 changed files with 27 additions and 4 deletions
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31
drivers/thunderbolt/quirks.c
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@ -12,7 +12,17 @@ static void quirk_force_power_link(struct tb_switch *sw)
sw->quirks |= QUIRK_FORCE_POWER_LINK_CONTROLLER; 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 { struct tb_quirk {
u16 hw_vendor_id;
u16 hw_device_id;
u16 vendor; u16 vendor;
u16 device; u16 device;
void (*hook)(struct tb_switch *sw); void (*hook)(struct tb_switch *sw);
@ -20,8 +30,13 @@ struct tb_quirk {
static const struct tb_quirk tb_quirks[] = { static const struct tb_quirk tb_quirks[] = {
/* Dell WD19TB supports self-authentication on unplug */ /* Dell WD19TB supports self-authentication on unplug */
{ 0x00d4, 0xb070, quirk_force_power_link }, { 0x0000, 0x0000, 0x00d4, 0xb070, quirk_force_power_link },
{ 0x00d4, 0xb071, 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 },
}; };
/** /**
@ -37,7 +52,15 @@ void tb_check_quirks(struct tb_switch *sw)
for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) { for (i = 0; i < ARRAY_SIZE(tb_quirks); i++) {
const struct tb_quirk *q = &tb_quirks[i]; const struct tb_quirk *q = &tb_quirks[i];
if (sw->device == q->device && sw->vendor == q->vendor) if (q->hw_vendor_id && q->hw_vendor_id != sw->config.vendor_id)
q->hook(sw); 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);
} }
} }