1 // SPDX-License-Identifier: MIT
2 /*
3  * Copyright © 2018 Intel Corporation
4  */
5 
6 #include <linux/dmi.h>
7 
8 #include "intel_display_types.h"
9 #include "intel_quirks.h"
10 
11 /*
12  * Some machines (Lenovo U160) do not work with SSC on LVDS for some reason
13  */
14 static void quirk_ssc_force_disable(struct drm_i915_private *i915)
15 {
16 	i915->quirks |= QUIRK_LVDS_SSC_DISABLE;
17 	drm_info(&i915->drm, "applying lvds SSC disable quirk\n");
18 }
19 
20 /*
21  * A machine (e.g. Acer Aspire 5734Z) may need to invert the panel backlight
22  * brightness value
23  */
24 static void quirk_invert_brightness(struct drm_i915_private *i915)
25 {
26 	i915->quirks |= QUIRK_INVERT_BRIGHTNESS;
27 	drm_info(&i915->drm, "applying inverted panel brightness quirk\n");
28 }
29 
30 /* Some VBT's incorrectly indicate no backlight is present */
31 static void quirk_backlight_present(struct drm_i915_private *i915)
32 {
33 	i915->quirks |= QUIRK_BACKLIGHT_PRESENT;
34 	drm_info(&i915->drm, "applying backlight present quirk\n");
35 }
36 
37 /* Toshiba Satellite P50-C-18C requires T12 delay to be min 800ms
38  * which is 300 ms greater than eDP spec T12 min.
39  */
40 static void quirk_increase_t12_delay(struct drm_i915_private *i915)
41 {
42 	i915->quirks |= QUIRK_INCREASE_T12_DELAY;
43 	drm_info(&i915->drm, "Applying T12 delay quirk\n");
44 }
45 
46 /*
47  * GeminiLake NUC HDMI outputs require additional off time
48  * this allows the onboard retimer to correctly sync to signal
49  */
50 static void quirk_increase_ddi_disabled_time(struct drm_i915_private *i915)
51 {
52 	i915->quirks |= QUIRK_INCREASE_DDI_DISABLED_TIME;
53 	drm_info(&i915->drm, "Applying Increase DDI Disabled quirk\n");
54 }
55 
56 struct intel_quirk {
57 	int device;
58 	int subsystem_vendor;
59 	int subsystem_device;
60 	void (*hook)(struct drm_i915_private *i915);
61 };
62 
63 /* For systems that don't have a meaningful PCI subdevice/subvendor ID */
64 struct intel_dmi_quirk {
65 	void (*hook)(struct drm_i915_private *i915);
66 	const struct dmi_system_id (*dmi_id_list)[];
67 };
68 
69 static int intel_dmi_reverse_brightness(const struct dmi_system_id *id)
70 {
71 	DRM_INFO("Backlight polarity reversed on %s\n", id->ident);
72 	return 1;
73 }
74 
75 static const struct intel_dmi_quirk intel_dmi_quirks[] = {
76 	{
77 		.dmi_id_list = &(const struct dmi_system_id[]) {
78 			{
79 				.callback = intel_dmi_reverse_brightness,
80 				.ident = "NCR Corporation",
81 				.matches = {DMI_MATCH(DMI_SYS_VENDOR, "NCR Corporation"),
82 					    DMI_MATCH(DMI_PRODUCT_NAME, ""),
83 				},
84 			},
85 			{
86 				.callback = intel_dmi_reverse_brightness,
87 				.ident = "Thundersoft TST178 tablet",
88 				/* DMI strings are too generic, also match on BIOS date */
89 				.matches = {DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
90 					    DMI_EXACT_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
91 					    DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "To be filled by O.E.M."),
92 					    DMI_EXACT_MATCH(DMI_BIOS_DATE, "04/15/2014"),
93 				},
94 			},
95 			{ }  /* terminating entry */
96 		},
97 		.hook = quirk_invert_brightness,
98 	},
99 };
100 
101 static struct intel_quirk intel_quirks[] = {
102 	/* Lenovo U160 cannot use SSC on LVDS */
103 	{ 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
104 
105 	/* Sony Vaio Y cannot use SSC on LVDS */
106 	{ 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
107 
108 	/* Acer Aspire 5734Z must invert backlight brightness */
109 	{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
110 
111 	/* Acer/eMachines G725 */
112 	{ 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
113 
114 	/* Acer/eMachines e725 */
115 	{ 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
116 
117 	/* Acer/Packard Bell NCL20 */
118 	{ 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
119 
120 	/* Acer Aspire 4736Z */
121 	{ 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
122 
123 	/* Acer Aspire 5336 */
124 	{ 0x2a42, 0x1025, 0x048a, quirk_invert_brightness },
125 
126 	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
127 	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
128 
129 	/* Acer C720 Chromebook (Core i3 4005U) */
130 	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },
131 
132 	/* Apple Macbook 2,1 (Core 2 T7400) */
133 	{ 0x27a2, 0x8086, 0x7270, quirk_backlight_present },
134 
135 	/* Apple Macbook 4,1 */
136 	{ 0x2a02, 0x106b, 0x00a1, quirk_backlight_present },
137 
138 	/* Toshiba CB35 Chromebook (Celeron 2955U) */
139 	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
140 
141 	/* HP Chromebook 14 (Celeron 2955U) */
142 	{ 0x0a06, 0x103c, 0x21ed, quirk_backlight_present },
143 
144 	/* Dell Chromebook 11 */
145 	{ 0x0a06, 0x1028, 0x0a35, quirk_backlight_present },
146 
147 	/* Dell Chromebook 11 (2015 version) */
148 	{ 0x0a16, 0x1028, 0x0a35, quirk_backlight_present },
149 
150 	/* Toshiba Satellite P50-C-18C */
151 	{ 0x191B, 0x1179, 0xF840, quirk_increase_t12_delay },
152 
153 	/* GeminiLake NUC */
154 	{ 0x3185, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
155 	{ 0x3184, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
156 	/* ASRock ITX*/
157 	{ 0x3185, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
158 	{ 0x3184, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
159 };
160 
161 void intel_init_quirks(struct drm_i915_private *i915)
162 {
163 	struct pci_dev *d = to_pci_dev(i915->drm.dev);
164 	int i;
165 
166 	for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
167 		struct intel_quirk *q = &intel_quirks[i];
168 
169 		if (d->device == q->device &&
170 		    (d->subsystem_vendor == q->subsystem_vendor ||
171 		     q->subsystem_vendor == PCI_ANY_ID) &&
172 		    (d->subsystem_device == q->subsystem_device ||
173 		     q->subsystem_device == PCI_ANY_ID))
174 			q->hook(i915);
175 	}
176 	for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
177 		if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
178 			intel_dmi_quirks[i].hook(i915);
179 	}
180 }
181