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alistair23-linux/drivers/gpu/drm/i915/intel_opregion.c
Ville Syrjälä bb10d4ec3b drm/i915: Ignore panel type from OpRegion on SKL 
Dell XPS 13 9350 apparently doesn't like it when we use the panel type
from OpRegion. The OpRegion panel type (0) tells us to use use low
vswing for eDP, whereas the VBT panel type (2) tells us to use normal
vswing. The problem is that low vswing results in some display flickers.
Since no one seems to know how this stuff is supposed to be handled,
let's just ignore the OpRegion panel type on SKL for now.

v2: Print the panel type correctly in the debug output

Reported-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: drm-intel-fixes@lists.freedesktop.org
References: https://lists.freedesktop.org/archives/intel-gfx/2016-June/098826.html
Fixes: a05628195a ("drm/i915: Get panel_type from OpRegion panel details")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1468324837-29237-1-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Tested-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
2016-07-14 16:05:40 +03:00

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/*
* Copyright 2008 Intel Corporation <hong.liu@intel.com>
* Copyright 2008 Red Hat <mjg@redhat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <linux/acpi.h>
#include <linux/dmi.h>
#include <acpi/video.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"
#include "intel_drv.h"
#define OPREGION_HEADER_OFFSET 0
#define OPREGION_ACPI_OFFSET 0x100
#define ACPI_CLID 0x01ac /* current lid state indicator */
#define ACPI_CDCK 0x01b0 /* current docking state indicator */
#define OPREGION_SWSCI_OFFSET 0x200
#define OPREGION_ASLE_OFFSET 0x300
#define OPREGION_VBT_OFFSET 0x400
#define OPREGION_ASLE_EXT_OFFSET 0x1C00
#define OPREGION_SIGNATURE "IntelGraphicsMem"
#define MBOX_ACPI (1<<0)
#define MBOX_SWSCI (1<<1)
#define MBOX_ASLE (1<<2)
#define MBOX_ASLE_EXT (1<<4)
struct opregion_header {
u8 signature[16];
u32 size;
u32 opregion_ver;
u8 bios_ver[32];
u8 vbios_ver[16];
u8 driver_ver[16];
u32 mboxes;
u32 driver_model;
u32 pcon;
u8 dver[32];
u8 rsvd[124];
} __packed;
/* OpRegion mailbox #1: public ACPI methods */
struct opregion_acpi {
u32 drdy; /* driver readiness */
u32 csts; /* notification status */
u32 cevt; /* current event */
u8 rsvd1[20];
u32 didl[8]; /* supported display devices ID list */
u32 cpdl[8]; /* currently presented display list */
u32 cadl[8]; /* currently active display list */
u32 nadl[8]; /* next active devices list */
u32 aslp; /* ASL sleep time-out */
u32 tidx; /* toggle table index */
u32 chpd; /* current hotplug enable indicator */
u32 clid; /* current lid state*/
u32 cdck; /* current docking state */
u32 sxsw; /* Sx state resume */
u32 evts; /* ASL supported events */
u32 cnot; /* current OS notification */
u32 nrdy; /* driver status */
u32 did2[7]; /* extended supported display devices ID list */
u32 cpd2[7]; /* extended attached display devices list */
u8 rsvd2[4];
} __packed;
/* OpRegion mailbox #2: SWSCI */
struct opregion_swsci {
u32 scic; /* SWSCI command|status|data */
u32 parm; /* command parameters */
u32 dslp; /* driver sleep time-out */
u8 rsvd[244];
} __packed;
/* OpRegion mailbox #3: ASLE */
struct opregion_asle {
u32 ardy; /* driver readiness */
u32 aslc; /* ASLE interrupt command */
u32 tche; /* technology enabled indicator */
u32 alsi; /* current ALS illuminance reading */
u32 bclp; /* backlight brightness to set */
u32 pfit; /* panel fitting state */
u32 cblv; /* current brightness level */
u16 bclm[20]; /* backlight level duty cycle mapping table */
u32 cpfm; /* current panel fitting mode */
u32 epfm; /* enabled panel fitting modes */
u8 plut[74]; /* panel LUT and identifier */
u32 pfmb; /* PWM freq and min brightness */
u32 cddv; /* color correction default values */
u32 pcft; /* power conservation features */
u32 srot; /* supported rotation angles */
u32 iuer; /* IUER events */
u64 fdss;
u32 fdsp;
u32 stat;
u64 rvda; /* Physical address of raw vbt data */
u32 rvds; /* Size of raw vbt data */
u8 rsvd[58];
} __packed;
/* OpRegion mailbox #5: ASLE ext */
struct opregion_asle_ext {
u32 phed; /* Panel Header */
u8 bddc[256]; /* Panel EDID */
u8 rsvd[764];
} __packed;
/* Driver readiness indicator */
#define ASLE_ARDY_READY (1 << 0)
#define ASLE_ARDY_NOT_READY (0 << 0)
/* ASLE Interrupt Command (ASLC) bits */
#define ASLC_SET_ALS_ILLUM (1 << 0)
#define ASLC_SET_BACKLIGHT (1 << 1)
#define ASLC_SET_PFIT (1 << 2)
#define ASLC_SET_PWM_FREQ (1 << 3)
#define ASLC_SUPPORTED_ROTATION_ANGLES (1 << 4)
#define ASLC_BUTTON_ARRAY (1 << 5)
#define ASLC_CONVERTIBLE_INDICATOR (1 << 6)
#define ASLC_DOCKING_INDICATOR (1 << 7)
#define ASLC_ISCT_STATE_CHANGE (1 << 8)
#define ASLC_REQ_MSK 0x1ff
/* response bits */
#define ASLC_ALS_ILLUM_FAILED (1 << 10)
#define ASLC_BACKLIGHT_FAILED (1 << 12)
#define ASLC_PFIT_FAILED (1 << 14)
#define ASLC_PWM_FREQ_FAILED (1 << 16)
#define ASLC_ROTATION_ANGLES_FAILED (1 << 18)
#define ASLC_BUTTON_ARRAY_FAILED (1 << 20)
#define ASLC_CONVERTIBLE_FAILED (1 << 22)
#define ASLC_DOCKING_FAILED (1 << 24)
#define ASLC_ISCT_STATE_FAILED (1 << 26)
/* Technology enabled indicator */
#define ASLE_TCHE_ALS_EN (1 << 0)
#define ASLE_TCHE_BLC_EN (1 << 1)
#define ASLE_TCHE_PFIT_EN (1 << 2)
#define ASLE_TCHE_PFMB_EN (1 << 3)
/* ASLE backlight brightness to set */
#define ASLE_BCLP_VALID (1<<31)
#define ASLE_BCLP_MSK (~(1<<31))
/* ASLE panel fitting request */
#define ASLE_PFIT_VALID (1<<31)
#define ASLE_PFIT_CENTER (1<<0)
#define ASLE_PFIT_STRETCH_TEXT (1<<1)
#define ASLE_PFIT_STRETCH_GFX (1<<2)
/* PWM frequency and minimum brightness */
#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
#define ASLE_PFMB_PWM_VALID (1<<31)
#define ASLE_CBLV_VALID (1<<31)
/* IUER */
#define ASLE_IUER_DOCKING (1 << 7)
#define ASLE_IUER_CONVERTIBLE (1 << 6)
#define ASLE_IUER_ROTATION_LOCK_BTN (1 << 4)
#define ASLE_IUER_VOLUME_DOWN_BTN (1 << 3)
#define ASLE_IUER_VOLUME_UP_BTN (1 << 2)
#define ASLE_IUER_WINDOWS_BTN (1 << 1)
#define ASLE_IUER_POWER_BTN (1 << 0)
/* Software System Control Interrupt (SWSCI) */
#define SWSCI_SCIC_INDICATOR (1 << 0)
#define SWSCI_SCIC_MAIN_FUNCTION_SHIFT 1
#define SWSCI_SCIC_MAIN_FUNCTION_MASK (0xf << 1)
#define SWSCI_SCIC_SUB_FUNCTION_SHIFT 8
#define SWSCI_SCIC_SUB_FUNCTION_MASK (0xff << 8)
#define SWSCI_SCIC_EXIT_PARAMETER_SHIFT 8
#define SWSCI_SCIC_EXIT_PARAMETER_MASK (0xff << 8)
#define SWSCI_SCIC_EXIT_STATUS_SHIFT 5
#define SWSCI_SCIC_EXIT_STATUS_MASK (7 << 5)
#define SWSCI_SCIC_EXIT_STATUS_SUCCESS 1
#define SWSCI_FUNCTION_CODE(main, sub) \
((main) << SWSCI_SCIC_MAIN_FUNCTION_SHIFT | \
(sub) << SWSCI_SCIC_SUB_FUNCTION_SHIFT)
/* SWSCI: Get BIOS Data (GBDA) */
#define SWSCI_GBDA 4
#define SWSCI_GBDA_SUPPORTED_CALLS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 0)
#define SWSCI_GBDA_REQUESTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 1)
#define SWSCI_GBDA_BOOT_DISPLAY_PREF SWSCI_FUNCTION_CODE(SWSCI_GBDA, 4)
#define SWSCI_GBDA_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 5)
#define SWSCI_GBDA_TV_STANDARD SWSCI_FUNCTION_CODE(SWSCI_GBDA, 6)
#define SWSCI_GBDA_INTERNAL_GRAPHICS SWSCI_FUNCTION_CODE(SWSCI_GBDA, 7)
#define SWSCI_GBDA_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_GBDA, 10)
/* SWSCI: System BIOS Callbacks (SBCB) */
#define SWSCI_SBCB 6
#define SWSCI_SBCB_SUPPORTED_CALLBACKS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 0)
#define SWSCI_SBCB_INIT_COMPLETION SWSCI_FUNCTION_CODE(SWSCI_SBCB, 1)
#define SWSCI_SBCB_PRE_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 3)
#define SWSCI_SBCB_POST_HIRES_SET_MODE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 4)
#define SWSCI_SBCB_DISPLAY_SWITCH SWSCI_FUNCTION_CODE(SWSCI_SBCB, 5)
#define SWSCI_SBCB_SET_TV_FORMAT SWSCI_FUNCTION_CODE(SWSCI_SBCB, 6)
#define SWSCI_SBCB_ADAPTER_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 7)
#define SWSCI_SBCB_DISPLAY_POWER_STATE SWSCI_FUNCTION_CODE(SWSCI_SBCB, 8)
#define SWSCI_SBCB_SET_BOOT_DISPLAY SWSCI_FUNCTION_CODE(SWSCI_SBCB, 9)
#define SWSCI_SBCB_SET_PANEL_DETAILS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 10)
#define SWSCI_SBCB_SET_INTERNAL_GFX SWSCI_FUNCTION_CODE(SWSCI_SBCB, 11)
#define SWSCI_SBCB_POST_HIRES_TO_DOS_FS SWSCI_FUNCTION_CODE(SWSCI_SBCB, 16)
#define SWSCI_SBCB_SUSPEND_RESUME SWSCI_FUNCTION_CODE(SWSCI_SBCB, 17)
#define SWSCI_SBCB_SET_SPREAD_SPECTRUM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 18)
#define SWSCI_SBCB_POST_VBE_PM SWSCI_FUNCTION_CODE(SWSCI_SBCB, 19)
#define SWSCI_SBCB_ENABLE_DISABLE_AUDIO SWSCI_FUNCTION_CODE(SWSCI_SBCB, 21)
/*
* ACPI Specification, Revision 5.0, Appendix B.3.2 _DOD (Enumerate All Devices
* Attached to the Display Adapter).
*/
#define ACPI_DISPLAY_INDEX_SHIFT 0
#define ACPI_DISPLAY_INDEX_MASK (0xf << 0)
#define ACPI_DISPLAY_PORT_ATTACHMENT_SHIFT 4
#define ACPI_DISPLAY_PORT_ATTACHMENT_MASK (0xf << 4)
#define ACPI_DISPLAY_TYPE_SHIFT 8
#define ACPI_DISPLAY_TYPE_MASK (0xf << 8)
#define ACPI_DISPLAY_TYPE_OTHER (0 << 8)
#define ACPI_DISPLAY_TYPE_VGA (1 << 8)
#define ACPI_DISPLAY_TYPE_TV (2 << 8)
#define ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL (3 << 8)
#define ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL (4 << 8)
#define ACPI_VENDOR_SPECIFIC_SHIFT 12
#define ACPI_VENDOR_SPECIFIC_MASK (0xf << 12)
#define ACPI_BIOS_CAN_DETECT (1 << 16)
#define ACPI_DEPENDS_ON_VGA (1 << 17)
#define ACPI_PIPE_ID_SHIFT 18
#define ACPI_PIPE_ID_MASK (7 << 18)
#define ACPI_DEVICE_ID_SCHEME (1 << 31)
#define MAX_DSLP 1500
static int swsci(struct drm_i915_private *dev_priv,
u32 function, u32 parm, u32 *parm_out)
{
struct opregion_swsci *swsci = dev_priv->opregion.swsci;
struct pci_dev *pdev = dev_priv->drm.pdev;
u32 main_function, sub_function, scic;
u16 swsci_val;
u32 dslp;
if (!swsci)
return -ENODEV;
main_function = (function & SWSCI_SCIC_MAIN_FUNCTION_MASK) >>
SWSCI_SCIC_MAIN_FUNCTION_SHIFT;
sub_function = (function & SWSCI_SCIC_SUB_FUNCTION_MASK) >>
SWSCI_SCIC_SUB_FUNCTION_SHIFT;
/* Check if we can call the function. See swsci_setup for details. */
if (main_function == SWSCI_SBCB) {
if ((dev_priv->opregion.swsci_sbcb_sub_functions &
(1 << sub_function)) == 0)
return -EINVAL;
} else if (main_function == SWSCI_GBDA) {
if ((dev_priv->opregion.swsci_gbda_sub_functions &
(1 << sub_function)) == 0)
return -EINVAL;
}
/* Driver sleep timeout in ms. */
dslp = swsci->dslp;
if (!dslp) {
/* The spec says 2ms should be the default, but it's too small
* for some machines. */
dslp = 50;
} else if (dslp > MAX_DSLP) {
/* Hey bios, trust must be earned. */
DRM_INFO_ONCE("ACPI BIOS requests an excessive sleep of %u ms, "
"using %u ms instead\n", dslp, MAX_DSLP);
dslp = MAX_DSLP;
}
/* The spec tells us to do this, but we are the only user... */
scic = swsci->scic;
if (scic & SWSCI_SCIC_INDICATOR) {
DRM_DEBUG_DRIVER("SWSCI request already in progress\n");
return -EBUSY;
}
scic = function | SWSCI_SCIC_INDICATOR;
swsci->parm = parm;
swsci->scic = scic;
/* Ensure SCI event is selected and event trigger is cleared. */
pci_read_config_word(pdev, SWSCI, &swsci_val);
if (!(swsci_val & SWSCI_SCISEL) || (swsci_val & SWSCI_GSSCIE)) {
swsci_val |= SWSCI_SCISEL;
swsci_val &= ~SWSCI_GSSCIE;
pci_write_config_word(pdev, SWSCI, swsci_val);
}
/* Use event trigger to tell bios to check the mail. */
swsci_val |= SWSCI_GSSCIE;
pci_write_config_word(pdev, SWSCI, swsci_val);
/* Poll for the result. */
#define C (((scic = swsci->scic) & SWSCI_SCIC_INDICATOR) == 0)
if (wait_for(C, dslp)) {
DRM_DEBUG_DRIVER("SWSCI request timed out\n");
return -ETIMEDOUT;
}
scic = (scic & SWSCI_SCIC_EXIT_STATUS_MASK) >>
SWSCI_SCIC_EXIT_STATUS_SHIFT;
/* Note: scic == 0 is an error! */
if (scic != SWSCI_SCIC_EXIT_STATUS_SUCCESS) {
DRM_DEBUG_DRIVER("SWSCI request error %u\n", scic);
return -EIO;
}
if (parm_out)
*parm_out = swsci->parm;
return 0;
#undef C
}
#define DISPLAY_TYPE_CRT 0
#define DISPLAY_TYPE_TV 1
#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL 2
#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL 3
int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
bool enable)
{
struct drm_i915_private *dev_priv = to_i915(intel_encoder->base.dev);
u32 parm = 0;
u32 type = 0;
u32 port;
/* don't care about old stuff for now */
if (!HAS_DDI(dev_priv))
return 0;
if (intel_encoder->type == INTEL_OUTPUT_DSI)
port = 0;
else
port = intel_ddi_get_encoder_port(intel_encoder);
if (port == PORT_E) {
port = 0;
} else {
parm |= 1 << port;
port++;
}
if (!enable)
parm |= 4 << 8;
switch (intel_encoder->type) {
case INTEL_OUTPUT_ANALOG:
type = DISPLAY_TYPE_CRT;
break;
case INTEL_OUTPUT_UNKNOWN:
case INTEL_OUTPUT_DP:
case INTEL_OUTPUT_HDMI:
case INTEL_OUTPUT_DP_MST:
type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
break;
case INTEL_OUTPUT_EDP:
case INTEL_OUTPUT_DSI:
type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
break;
default:
WARN_ONCE(1, "unsupported intel_encoder type %d\n",
intel_encoder->type);
return -EINVAL;
}
parm |= type << (16 + port * 3);
return swsci(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
}
static const struct {
pci_power_t pci_power_state;
u32 parm;
} power_state_map[] = {
{ PCI_D0, 0x00 },
{ PCI_D1, 0x01 },
{ PCI_D2, 0x02 },
{ PCI_D3hot, 0x04 },
{ PCI_D3cold, 0x04 },
};
int intel_opregion_notify_adapter(struct drm_i915_private *dev_priv,
pci_power_t state)
{
int i;
if (!HAS_DDI(dev_priv))
return 0;
for (i = 0; i < ARRAY_SIZE(power_state_map); i++) {
if (state == power_state_map[i].pci_power_state)
return swsci(dev_priv, SWSCI_SBCB_ADAPTER_POWER_STATE,
power_state_map[i].parm, NULL);
}
return -EINVAL;
}
static u32 asle_set_backlight(struct drm_i915_private *dev_priv, u32 bclp)
{
struct intel_connector *connector;
struct opregion_asle *asle = dev_priv->opregion.asle;
struct drm_device *dev = &dev_priv->drm;
DRM_DEBUG_DRIVER("bclp = 0x%08x\n", bclp);
if (acpi_video_get_backlight_type() == acpi_backlight_native) {
DRM_DEBUG_KMS("opregion backlight request ignored\n");
return 0;
}
if (!(bclp & ASLE_BCLP_VALID))
return ASLC_BACKLIGHT_FAILED;
bclp &= ASLE_BCLP_MSK;
if (bclp > 255)
return ASLC_BACKLIGHT_FAILED;
drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
/*
* Update backlight on all connectors that support backlight (usually
* only one).
*/
DRM_DEBUG_KMS("updating opregion backlight %d/255\n", bclp);
for_each_intel_connector(dev, connector)
intel_panel_set_backlight_acpi(connector, bclp, 255);
asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
drm_modeset_unlock(&dev->mode_config.connection_mutex);
return 0;
}
static u32 asle_set_als_illum(struct drm_i915_private *dev_priv, u32 alsi)
{
/* alsi is the current ALS reading in lux. 0 indicates below sensor
range, 0xffff indicates above sensor range. 1-0xfffe are valid */
DRM_DEBUG_DRIVER("Illum is not supported\n");
return ASLC_ALS_ILLUM_FAILED;
}
static u32 asle_set_pwm_freq(struct drm_i915_private *dev_priv, u32 pfmb)
{
DRM_DEBUG_DRIVER("PWM freq is not supported\n");
return ASLC_PWM_FREQ_FAILED;
}
static u32 asle_set_pfit(struct drm_i915_private *dev_priv, u32 pfit)
{
/* Panel fitting is currently controlled by the X code, so this is a
noop until modesetting support works fully */
DRM_DEBUG_DRIVER("Pfit is not supported\n");
return ASLC_PFIT_FAILED;
}
static u32 asle_set_supported_rotation_angles(struct drm_i915_private *dev_priv, u32 srot)
{
DRM_DEBUG_DRIVER("SROT is not supported\n");
return ASLC_ROTATION_ANGLES_FAILED;
}
static u32 asle_set_button_array(struct drm_i915_private *dev_priv, u32 iuer)
{
if (!iuer)
DRM_DEBUG_DRIVER("Button array event is not supported (nothing)\n");
if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
DRM_DEBUG_DRIVER("Button array event is not supported (rotation lock)\n");
if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
DRM_DEBUG_DRIVER("Button array event is not supported (volume down)\n");
if (iuer & ASLE_IUER_VOLUME_UP_BTN)
DRM_DEBUG_DRIVER("Button array event is not supported (volume up)\n");
if (iuer & ASLE_IUER_WINDOWS_BTN)
DRM_DEBUG_DRIVER("Button array event is not supported (windows)\n");
if (iuer & ASLE_IUER_POWER_BTN)
DRM_DEBUG_DRIVER("Button array event is not supported (power)\n");
return ASLC_BUTTON_ARRAY_FAILED;
}
static u32 asle_set_convertible(struct drm_i915_private *dev_priv, u32 iuer)
{
if (iuer & ASLE_IUER_CONVERTIBLE)
DRM_DEBUG_DRIVER("Convertible is not supported (clamshell)\n");
else
DRM_DEBUG_DRIVER("Convertible is not supported (slate)\n");
return ASLC_CONVERTIBLE_FAILED;
}
static u32 asle_set_docking(struct drm_i915_private *dev_priv, u32 iuer)
{
if (iuer & ASLE_IUER_DOCKING)
DRM_DEBUG_DRIVER("Docking is not supported (docked)\n");
else
DRM_DEBUG_DRIVER("Docking is not supported (undocked)\n");
return ASLC_DOCKING_FAILED;
}
static u32 asle_isct_state(struct drm_i915_private *dev_priv)
{
DRM_DEBUG_DRIVER("ISCT is not supported\n");
return ASLC_ISCT_STATE_FAILED;
}
static void asle_work(struct work_struct *work)
{
struct intel_opregion *opregion =
container_of(work, struct intel_opregion, asle_work);
struct drm_i915_private *dev_priv =
container_of(opregion, struct drm_i915_private, opregion);
struct opregion_asle *asle = dev_priv->opregion.asle;
u32 aslc_stat = 0;
u32 aslc_req;
if (!asle)
return;
aslc_req = asle->aslc;
if (!(aslc_req & ASLC_REQ_MSK)) {
DRM_DEBUG_DRIVER("No request on ASLC interrupt 0x%08x\n",
aslc_req);
return;
}
if (aslc_req & ASLC_SET_ALS_ILLUM)
aslc_stat |= asle_set_als_illum(dev_priv, asle->alsi);
if (aslc_req & ASLC_SET_BACKLIGHT)
aslc_stat |= asle_set_backlight(dev_priv, asle->bclp);
if (aslc_req & ASLC_SET_PFIT)
aslc_stat |= asle_set_pfit(dev_priv, asle->pfit);
if (aslc_req & ASLC_SET_PWM_FREQ)
aslc_stat |= asle_set_pwm_freq(dev_priv, asle->pfmb);
if (aslc_req & ASLC_SUPPORTED_ROTATION_ANGLES)
aslc_stat |= asle_set_supported_rotation_angles(dev_priv,
asle->srot);
if (aslc_req & ASLC_BUTTON_ARRAY)
aslc_stat |= asle_set_button_array(dev_priv, asle->iuer);
if (aslc_req & ASLC_CONVERTIBLE_INDICATOR)
aslc_stat |= asle_set_convertible(dev_priv, asle->iuer);
if (aslc_req & ASLC_DOCKING_INDICATOR)
aslc_stat |= asle_set_docking(dev_priv, asle->iuer);
if (aslc_req & ASLC_ISCT_STATE_CHANGE)
aslc_stat |= asle_isct_state(dev_priv);
asle->aslc = aslc_stat;
}
void intel_opregion_asle_intr(struct drm_i915_private *dev_priv)
{
if (dev_priv->opregion.asle)
schedule_work(&dev_priv->opregion.asle_work);
}
#define ACPI_EV_DISPLAY_SWITCH (1<<0)
#define ACPI_EV_LID (1<<1)
#define ACPI_EV_DOCK (1<<2)
static struct intel_opregion *system_opregion;
static int intel_opregion_video_event(struct notifier_block *nb,
unsigned long val, void *data)
{
/* The only video events relevant to opregion are 0x80. These indicate
either a docking event, lid switch or display switch request. In
Linux, these are handled by the dock, button and video drivers.
*/
struct acpi_bus_event *event = data;
struct opregion_acpi *acpi;
int ret = NOTIFY_OK;
if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
return NOTIFY_DONE;
if (!system_opregion)
return NOTIFY_DONE;
acpi = system_opregion->acpi;
if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
ret = NOTIFY_BAD;
acpi->csts = 0;
return ret;
}
static struct notifier_block intel_opregion_notifier = {
.notifier_call = intel_opregion_video_event,
};
/*
* Initialise the DIDL field in opregion. This passes a list of devices to
* the firmware. Values are defined by section B.4.2 of the ACPI specification
* (version 3)
*/
static u32 get_did(struct intel_opregion *opregion, int i)
{
u32 did;
if (i < ARRAY_SIZE(opregion->acpi->didl)) {
did = opregion->acpi->didl[i];
} else {
i -= ARRAY_SIZE(opregion->acpi->didl);
if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
return 0;
did = opregion->acpi->did2[i];
}
return did;
}
static void set_did(struct intel_opregion *opregion, int i, u32 val)
{
if (i < ARRAY_SIZE(opregion->acpi->didl)) {
opregion->acpi->didl[i] = val;
} else {
i -= ARRAY_SIZE(opregion->acpi->didl);
if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
return;
opregion->acpi->did2[i] = val;
}
}
static u32 acpi_display_type(struct drm_connector *connector)
{
u32 display_type;
switch (connector->connector_type) {
case DRM_MODE_CONNECTOR_VGA:
case DRM_MODE_CONNECTOR_DVIA:
display_type = ACPI_DISPLAY_TYPE_VGA;
break;
case DRM_MODE_CONNECTOR_Composite:
case DRM_MODE_CONNECTOR_SVIDEO:
case DRM_MODE_CONNECTOR_Component:
case DRM_MODE_CONNECTOR_9PinDIN:
case DRM_MODE_CONNECTOR_TV:
display_type = ACPI_DISPLAY_TYPE_TV;
break;
case DRM_MODE_CONNECTOR_DVII:
case DRM_MODE_CONNECTOR_DVID:
case DRM_MODE_CONNECTOR_DisplayPort:
case DRM_MODE_CONNECTOR_HDMIA:
case DRM_MODE_CONNECTOR_HDMIB:
display_type = ACPI_DISPLAY_TYPE_EXTERNAL_DIGITAL;
break;
case DRM_MODE_CONNECTOR_LVDS:
case DRM_MODE_CONNECTOR_eDP:
case DRM_MODE_CONNECTOR_DSI:
display_type = ACPI_DISPLAY_TYPE_INTERNAL_DIGITAL;
break;
case DRM_MODE_CONNECTOR_Unknown:
case DRM_MODE_CONNECTOR_VIRTUAL:
display_type = ACPI_DISPLAY_TYPE_OTHER;
break;
default:
MISSING_CASE(connector->connector_type);
display_type = ACPI_DISPLAY_TYPE_OTHER;
break;
}
return display_type;
}
static void intel_didl_outputs(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
struct pci_dev *pdev = dev_priv->drm.pdev;
struct drm_connector *connector;
acpi_handle handle;
struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
unsigned long long device_id;
acpi_status status;
u32 temp, max_outputs;
int i = 0;
handle = ACPI_HANDLE(&pdev->dev);
if (!handle || acpi_bus_get_device(handle, &acpi_dev))
return;
if (acpi_is_video_device(handle))
acpi_video_bus = acpi_dev;
else {
list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
if (acpi_is_video_device(acpi_cdev->handle)) {
acpi_video_bus = acpi_cdev;
break;
}
}
}
if (!acpi_video_bus) {
DRM_DEBUG_KMS("No ACPI video bus found\n");
return;
}
/*
* In theory, did2, the extended didl, gets added at opregion version
* 3.0. In practice, however, we're supposed to set it for earlier
* versions as well, since a BIOS that doesn't understand did2 should
* not look at it anyway. Use a variable so we can tweak this if a need
* arises later.
*/
max_outputs = ARRAY_SIZE(opregion->acpi->didl) +
ARRAY_SIZE(opregion->acpi->did2);
list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
if (i >= max_outputs) {
DRM_DEBUG_KMS("More than %u outputs detected via ACPI\n",
max_outputs);
return;
}
status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
NULL, &device_id);
if (ACPI_SUCCESS(status)) {
if (!device_id)
goto blind_set;
set_did(opregion, i++, (u32)(device_id & 0x0f0f));
}
}
end:
DRM_DEBUG_KMS("%d outputs detected\n", i);
/* If fewer than max outputs, the list must be null terminated */
if (i < max_outputs)
set_did(opregion, i, 0);
return;
blind_set:
i = 0;
list_for_each_entry(connector,
&dev_priv->drm.mode_config.connector_list, head) {
int display_type = acpi_display_type(connector);
if (i >= max_outputs) {
DRM_DEBUG_KMS("More than %u outputs in connector list\n",
max_outputs);
return;
}
temp = get_did(opregion, i);
set_did(opregion, i, temp | (1 << 31) | display_type | i);
i++;
}
goto end;
}
static void intel_setup_cadls(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
int i = 0;
u32 disp_id;
/* Initialize the CADL field by duplicating the DIDL values.
* Technically, this is not always correct as display outputs may exist,
* but not active. This initialization is necessary for some Clevo
* laptops that check this field before processing the brightness and
* display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
* there are less than eight devices. */
do {
disp_id = get_did(opregion, i);
opregion->acpi->cadl[i] = disp_id;
} while (++i < 8 && disp_id != 0);
}
void intel_opregion_register(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
if (!opregion->header)
return;
if (opregion->acpi) {
intel_didl_outputs(dev_priv);
intel_setup_cadls(dev_priv);
/* Notify BIOS we are ready to handle ACPI video ext notifs.
* Right now, all the events are handled by the ACPI video module.
* We don't actually need to do anything with them. */
opregion->acpi->csts = 0;
opregion->acpi->drdy = 1;
system_opregion = opregion;
register_acpi_notifier(&intel_opregion_notifier);
}
if (opregion->asle) {
opregion->asle->tche = ASLE_TCHE_BLC_EN;
opregion->asle->ardy = ASLE_ARDY_READY;
}
}
void intel_opregion_unregister(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
if (!opregion->header)
return;
if (opregion->asle)
opregion->asle->ardy = ASLE_ARDY_NOT_READY;
cancel_work_sync(&dev_priv->opregion.asle_work);
if (opregion->acpi) {
opregion->acpi->drdy = 0;
system_opregion = NULL;
unregister_acpi_notifier(&intel_opregion_notifier);
}
/* just clear all opregion memory pointers now */
memunmap(opregion->header);
if (opregion->rvda) {
memunmap(opregion->rvda);
opregion->rvda = NULL;
}
opregion->header = NULL;
opregion->acpi = NULL;
opregion->swsci = NULL;
opregion->asle = NULL;
opregion->vbt = NULL;
opregion->lid_state = NULL;
}
static void swsci_setup(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
bool requested_callbacks = false;
u32 tmp;
/* Sub-function code 0 is okay, let's allow them. */
opregion->swsci_gbda_sub_functions = 1;
opregion->swsci_sbcb_sub_functions = 1;
/* We use GBDA to ask for supported GBDA calls. */
if (swsci(dev_priv, SWSCI_GBDA_SUPPORTED_CALLS, 0, &tmp) == 0) {
/* make the bits match the sub-function codes */
tmp <<= 1;
opregion->swsci_gbda_sub_functions |= tmp;
}
/*
* We also use GBDA to ask for _requested_ SBCB callbacks. The driver
* must not call interfaces that are not specifically requested by the
* bios.
*/
if (swsci(dev_priv, SWSCI_GBDA_REQUESTED_CALLBACKS, 0, &tmp) == 0) {
/* here, the bits already match sub-function codes */
opregion->swsci_sbcb_sub_functions |= tmp;
requested_callbacks = true;
}
/*
* But we use SBCB to ask for _supported_ SBCB calls. This does not mean
* the callback is _requested_. But we still can't call interfaces that
* are not requested.
*/
if (swsci(dev_priv, SWSCI_SBCB_SUPPORTED_CALLBACKS, 0, &tmp) == 0) {
/* make the bits match the sub-function codes */
u32 low = tmp & 0x7ff;
u32 high = tmp & ~0xfff; /* bit 11 is reserved */
tmp = (high << 4) | (low << 1) | 1;
/* best guess what to do with supported wrt requested */
if (requested_callbacks) {
u32 req = opregion->swsci_sbcb_sub_functions;
if ((req & tmp) != req)
DRM_DEBUG_DRIVER("SWSCI BIOS requested (%08x) SBCB callbacks that are not supported (%08x)\n", req, tmp);
/* XXX: for now, trust the requested callbacks */
/* opregion->swsci_sbcb_sub_functions &= tmp; */
} else {
opregion->swsci_sbcb_sub_functions |= tmp;
}
}
DRM_DEBUG_DRIVER("SWSCI GBDA callbacks %08x, SBCB callbacks %08x\n",
opregion->swsci_gbda_sub_functions,
opregion->swsci_sbcb_sub_functions);
}
static int intel_no_opregion_vbt_callback(const struct dmi_system_id *id)
{
DRM_DEBUG_KMS("Falling back to manually reading VBT from "
"VBIOS ROM for %s\n", id->ident);
return 1;
}
static const struct dmi_system_id intel_no_opregion_vbt[] = {
{
.callback = intel_no_opregion_vbt_callback,
.ident = "ThinkCentre A57",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_NAME, "97027RG"),
},
},
{ }
};
int intel_opregion_setup(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->opregion;
struct pci_dev *pdev = dev_priv->drm.pdev;
u32 asls, mboxes;
char buf[sizeof(OPREGION_SIGNATURE)];
int err = 0;
void *base;
BUILD_BUG_ON(sizeof(struct opregion_header) != 0x100);
BUILD_BUG_ON(sizeof(struct opregion_acpi) != 0x100);
BUILD_BUG_ON(sizeof(struct opregion_swsci) != 0x100);
BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
pci_read_config_dword(pdev, ASLS, &asls);
DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
if (asls == 0) {
DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
return -ENOTSUPP;
}
INIT_WORK(&opregion->asle_work, asle_work);
base = memremap(asls, OPREGION_SIZE, MEMREMAP_WB);
if (!base)
return -ENOMEM;
memcpy(buf, base, sizeof(buf));
if (memcmp(buf, OPREGION_SIGNATURE, 16)) {
DRM_DEBUG_DRIVER("opregion signature mismatch\n");
err = -EINVAL;
goto err_out;
}
opregion->header = base;
opregion->lid_state = base + ACPI_CLID;
mboxes = opregion->header->mboxes;
if (mboxes & MBOX_ACPI) {
DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
opregion->acpi = base + OPREGION_ACPI_OFFSET;
}
if (mboxes & MBOX_SWSCI) {
DRM_DEBUG_DRIVER("SWSCI supported\n");
opregion->swsci = base + OPREGION_SWSCI_OFFSET;
swsci_setup(dev_priv);
}
if (mboxes & MBOX_ASLE) {
DRM_DEBUG_DRIVER("ASLE supported\n");
opregion->asle = base + OPREGION_ASLE_OFFSET;
opregion->asle->ardy = ASLE_ARDY_NOT_READY;
}
if (mboxes & MBOX_ASLE_EXT)
DRM_DEBUG_DRIVER("ASLE extension supported\n");
if (!dmi_check_system(intel_no_opregion_vbt)) {
const void *vbt = NULL;
u32 vbt_size = 0;
if (opregion->header->opregion_ver >= 2 && opregion->asle &&
opregion->asle->rvda && opregion->asle->rvds) {
opregion->rvda = memremap(opregion->asle->rvda,
opregion->asle->rvds,
MEMREMAP_WB);
vbt = opregion->rvda;
vbt_size = opregion->asle->rvds;
}
if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (RVDA)\n");
opregion->vbt = vbt;
opregion->vbt_size = vbt_size;
} else {
vbt = base + OPREGION_VBT_OFFSET;
vbt_size = OPREGION_ASLE_EXT_OFFSET - OPREGION_VBT_OFFSET;
if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
DRM_DEBUG_KMS("Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
opregion->vbt = vbt;
opregion->vbt_size = vbt_size;
}
}
}
return 0;
err_out:
memunmap(base);
return err;
}
int
intel_opregion_get_panel_type(struct drm_i915_private *dev_priv)
{
u32 panel_details;
int ret;
ret = swsci(dev_priv, SWSCI_GBDA_PANEL_DETAILS, 0x0, &panel_details);
if (ret) {
DRM_DEBUG_KMS("Failed to get panel details from OpRegion (%d)\n",
ret);
return ret;
}
ret = (panel_details >> 8) & 0xff;
if (ret > 0x10) {
DRM_DEBUG_KMS("Invalid OpRegion panel type 0x%x\n", ret);
return -EINVAL;
}
/* fall back to VBT panel type? */
if (ret == 0x0) {
DRM_DEBUG_KMS("No panel type in OpRegion\n");
return -ENODEV;
}
/*
* FIXME On Dell XPS 13 9350 the OpRegion panel type (0) gives us
* low vswing for eDP, whereas the VBT panel type (2) gives us normal
* vswing instead. Low vswing results in some display flickers, so
* let's simply ignore the OpRegion panel type on SKL for now.
*/
if (IS_SKYLAKE(dev_priv)) {
DRM_DEBUG_KMS("Ignoring OpRegion panel type (%d)\n", ret - 1);
return -ENODEV;
}
return ret - 1;
}
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