Commit 7c37bb30 authored by Mika Westerberg's avatar Mika Westerberg
Browse files

thunderbolt: Add quirk for Intel Goshen Ridge DP credits 



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: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
parent 6ed541c5

drivers/thunderbolt/quirks.c

+27 −4
Original line number Diff line number Diff line
@@ -12,7 +12,17 @@ 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);
@@ -20,8 +30,13 @@ struct tb_quirk { 


static const struct tb_quirk tb_quirks[] = {

	/* Dell WD19TB supports self-authentication on unplug */

	{ 0x00d4, 0xb070, quirk_force_power_link },

	{ 0x00d4, 0xb071, quirk_force_power_link },

	{ 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 },

};



/**
@@ -37,7 +52,15 @@ void tb_check_quirks(struct tb_switch *sw) 
	for (i = 0; i < ARRAY_SIZE(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)

			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);

	}

}