linux/drivers/gpu/drm/i915/display/intel_quirks.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2018 Intel Corporation
 */

#include <linux/dmi.h>

#include "intel_display_types.h"
#include "intel_quirks.h"

/*
 * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
 */
static void quirk_ssc_force_disable(struct drm_i915_private *i915)
{
	i915->quirks |= QUIRK_LVDS_SSC_DISABLE;
	drm_info(&i915->drm, "applying lvds SSC disable quirk\n");
}

/*
 * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
 * brightness value
 */
static void quirk_invert_brightness(struct drm_i915_private *i915)
{
	i915->quirks |= QUIRK_INVERT_BRIGHTNESS;
	drm_info(&i915->drm, "applying inverted panel brightness quirk\n");
}

/* Some VBT's incorrectly indicate no backlight is present */
static void quirk_backlight_present(struct drm_i915_private *i915)
{
	i915->quirks |= QUIRK_BACKLIGHT_PRESENT;
	drm_info(&i915->drm, "applying backlight present quirk\n");
}

/* Toshiba Satellite P50-C-18C requires T12 delay to be min 800ms
 * which is 300 ms greater than eDP spec T12 min.
 */
static void quirk_increase_t12_delay(struct drm_i915_private *i915)
{
	i915->quirks |= QUIRK_INCREASE_T12_DELAY;
	drm_info(&i915->drm, "Applying T12 delay quirk\n");
}

/*
 * GeminiLake NUC HDMI outputs require additional off time
 * this allows the onboard retimer to correctly sync to signal
 */
static void quirk_increase_ddi_disabled_time(struct drm_i915_private *i915)
{
	i915->quirks |= QUIRK_INCREASE_DDI_DISABLED_TIME;
	drm_info(&i915->drm, "Applying Increase DDI Disabled quirk\n");
}

struct intel_quirk {
	int device;
	int subsystem_vendor;
	int subsystem_device;
	void (*hook)(struct drm_i915_private *i915);
};

/* For systems that don't have a meaningful PCI subdevice/subvendor ID */
struct intel_dmi_quirk {
	void (*hook)(struct drm_i915_private *i915);
	const struct dmi_system_id (*dmi_id_list)[];
};

static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
{
	DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
	return 1;
}

static const struct intel_dmi_quirk intel_dmi_quirks[] = {
	{
		.dmi_id_list = &(const struct dmi_system_id[]) {
			{
				.callback = intel_dmi_reverse_brightness,
				.ident = "NCR Corporation",
				.matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
					    DMI_MATCH(DMI_PRODUCT_NAME, ""),
				},
			},
			{
				.callback = intel_dmi_reverse_brightness,
				.ident = "Thundersoft TST178 tablet",
				/* DMI strings are too generic, also match on BIOS date */
				.matches = {DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
					    DMI_EXACT_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
					    DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "To be filled by O.E.M."),
					    DMI_EXACT_MATCH(DMI_BIOS_DATE, "04/15/2014"),
				},
			},
			{ }  /* terminating entry */
		},
		.hook = quirk_invert_brightness,
	},
};

static struct intel_quirk intel_quirks[] = {
	/* Lenovo U160 cannot use SSC on LVDS */
	{ 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },

	/* Sony Vaio Y cannot use SSC on LVDS */
	{ 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },

	/* Acer Aspire 5734Z must invert backlight brightness */
	{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },

	/* Acer/eMachines G725 */
	{ 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },

	/* Acer/eMachines e725 */
	{ 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },

	/* Acer/Packard Bell NCL20 */
	{ 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },

	/* Acer Aspire 4736Z */
	{ 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },

	/* Acer Aspire 5336 */
	{ 0x2a42, 0x1025, 0x048a, quirk_invert_brightness },

	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },

	/* Acer C720 Chromebook (Core i3 4005U) */
	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },

	/* Apple Macbook 2,1 (Core 2 T7400) */
	{ 0x27a2, 0x8086, 0x7270, quirk_backlight_present },

	/* Apple Macbook 4,1 */
	{ 0x2a02, 0x106b, 0x00a1, quirk_backlight_present },

	/* Toshiba CB35 Chromebook (Celeron 2955U) */
	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },

	/* HP Chromebook 14 (Celeron 2955U) */
	{ 0x0a06, 0x103c, 0x21ed, quirk_backlight_present },

	/* Dell Chromebook 11 */
	{ 0x0a06, 0x1028, 0x0a35, quirk_backlight_present },

	/* Dell Chromebook 11 (2015 version) */
	{ 0x0a16, 0x1028, 0x0a35, quirk_backlight_present },

	/* Toshiba Satellite P50-C-18C */
	{ 0x191B, 0x1179, 0xF840, quirk_increase_t12_delay },

	/* GeminiLake NUC */
	{ 0x3185, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
	{ 0x3184, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
	/* ASRock ITX*/
	{ 0x3185, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
	{ 0x3184, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
};

void intel_init_quirks(struct drm_i915_private *i915)
{
	struct pci_dev *d = to_pci_dev(i915->drm.dev);
	int i;

	for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
		struct intel_quirk *q = &intel_quirks[i];

		if (d->device == q->device &&
		    (d->subsystem_vendor == q->subsystem_vendor ||
		     q->subsystem_vendor == PCI_ANY_ID) &&
		    (d->subsystem_device == q->subsystem_device ||
		     q->subsystem_device == PCI_ANY_ID))
			q->hook(i915);
	}
	for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
		if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
			intel_dmi_quirks[i].hook(i915);
	}
}