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("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("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("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("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("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 			{ }  /* terminating entry */
86 		},
87 		.hook = quirk_invert_brightness,
88 	},
89 };
90 
91 static struct intel_quirk intel_quirks[] = {
92 	/* Lenovo U160 cannot use SSC on LVDS */
93 	{ 0x0046, 0x17aa, 0x3920, quirk_ssc_force_disable },
94 
95 	/* Sony Vaio Y cannot use SSC on LVDS */
96 	{ 0x0046, 0x104d, 0x9076, quirk_ssc_force_disable },
97 
98 	/* Acer Aspire 5734Z must invert backlight brightness */
99 	{ 0x2a42, 0x1025, 0x0459, quirk_invert_brightness },
100 
101 	/* Acer/eMachines G725 */
102 	{ 0x2a42, 0x1025, 0x0210, quirk_invert_brightness },
103 
104 	/* Acer/eMachines e725 */
105 	{ 0x2a42, 0x1025, 0x0212, quirk_invert_brightness },
106 
107 	/* Acer/Packard Bell NCL20 */
108 	{ 0x2a42, 0x1025, 0x034b, quirk_invert_brightness },
109 
110 	/* Acer Aspire 4736Z */
111 	{ 0x2a42, 0x1025, 0x0260, quirk_invert_brightness },
112 
113 	/* Acer Aspire 5336 */
114 	{ 0x2a42, 0x1025, 0x048a, quirk_invert_brightness },
115 
116 	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
117 	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
118 
119 	/* Acer C720 Chromebook (Core i3 4005U) */
120 	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },
121 
122 	/* Apple Macbook 2,1 (Core 2 T7400) */
123 	{ 0x27a2, 0x8086, 0x7270, quirk_backlight_present },
124 
125 	/* Apple Macbook 4,1 */
126 	{ 0x2a02, 0x106b, 0x00a1, quirk_backlight_present },
127 
128 	/* Toshiba CB35 Chromebook (Celeron 2955U) */
129 	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
130 
131 	/* HP Chromebook 14 (Celeron 2955U) */
132 	{ 0x0a06, 0x103c, 0x21ed, quirk_backlight_present },
133 
134 	/* Dell Chromebook 11 */
135 	{ 0x0a06, 0x1028, 0x0a35, quirk_backlight_present },
136 
137 	/* Dell Chromebook 11 (2015 version) */
138 	{ 0x0a16, 0x1028, 0x0a35, quirk_backlight_present },
139 
140 	/* Toshiba Satellite P50-C-18C */
141 	{ 0x191B, 0x1179, 0xF840, quirk_increase_t12_delay },
142 
143 	/* GeminiLake NUC */
144 	{ 0x3185, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
145 	{ 0x3184, 0x8086, 0x2072, quirk_increase_ddi_disabled_time },
146 	/* ASRock ITX*/
147 	{ 0x3185, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
148 	{ 0x3184, 0x1849, 0x2212, quirk_increase_ddi_disabled_time },
149 };
150 
151 void intel_init_quirks(struct drm_i915_private *i915)
152 {
153 	struct pci_dev *d = i915->drm.pdev;
154 	int i;
155 
156 	for (i = 0; i < ARRAY_SIZE(intel_quirks); i++) {
157 		struct intel_quirk *q = &intel_quirks[i];
158 
159 		if (d->device == q->device &&
160 		    (d->subsystem_vendor == q->subsystem_vendor ||
161 		     q->subsystem_vendor == PCI_ANY_ID) &&
162 		    (d->subsystem_device == q->subsystem_device ||
163 		     q->subsystem_device == PCI_ANY_ID))
164 			q->hook(i915);
165 	}
166 	for (i = 0; i < ARRAY_SIZE(intel_dmi_quirks); i++) {
167 		if (dmi_check_system(*intel_dmi_quirks[i].dmi_id_list) != 0)
168 			intel_dmi_quirks[i].hook(i915);
169 	}
170 }
171