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

DEFINITIONS

1. quirk_ssc_force_disable
2. quirk_invert_brightness
3. quirk_backlight_present
4. quirk_increase_t12_delay
5. quirk_increase_ddi_disabled_time
6. intel_dmi_reverse_brightness
7. intel_init_quirks

   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 }