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linux-zen-desktop/drivers/gpu/drm/i915/display/intel_opregion.c

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2023-08-30 17:31:07 +02:00
/*
* 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 <linux/firmware.h>
#include <acpi/video.h>
#include <drm/drm_edid.h>
#include "i915_drv.h"
#include "intel_acpi.h"
#include "intel_backlight.h"
#include "intel_display_types.h"
#include "intel_opregion.h"
#include "intel_pci_config.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 BIT(0) /* Mailbox #1 */
#define MBOX_SWSCI BIT(1) /* Mailbox #2 (obsolete from v2.x) */
#define MBOX_ASLE BIT(2) /* Mailbox #3 */
#define MBOX_ASLE_EXT BIT(4) /* Mailbox #5 */
#define MBOX_BACKLIGHT BIT(5) /* Mailbox #2 (valid from v3.x) */
#define PCON_HEADLESS_SKU BIT(13)
struct opregion_header {
u8 signature[16];
u32 size;
struct {
u8 rsvd;
u8 revision;
u8 minor;
u8 major;
} __packed over;
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 (2.0) or relative from opregion (2.1+)
* 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)
#define ASLE_PHED_EDID_VALID_MASK 0x3
/* 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)
#define MAX_DSLP 1500
static int check_swsci_function(struct drm_i915_private *i915, u32 function)
{
struct opregion_swsci *swsci = i915->display.opregion.swsci;
u32 main_function, sub_function;
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 ((i915->display.opregion.swsci_sbcb_sub_functions &
(1 << sub_function)) == 0)
return -EINVAL;
} else if (main_function == SWSCI_GBDA) {
if ((i915->display.opregion.swsci_gbda_sub_functions &
(1 << sub_function)) == 0)
return -EINVAL;
}
return 0;
}
static int swsci(struct drm_i915_private *dev_priv,
u32 function, u32 parm, u32 *parm_out)
{
struct opregion_swsci *swsci = dev_priv->display.opregion.swsci;
struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
u32 scic, dslp;
u16 swsci_val;
int ret;
ret = check_swsci_function(dev_priv, function);
if (ret)
return ret;
/* 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_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm, "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;
int ret;
/* don't care about old stuff for now */
if (!HAS_DDI(dev_priv))
return 0;
/* Avoid port out of bounds checks if SWSCI isn't there. */
ret = check_swsci_function(dev_priv, SWSCI_SBCB_DISPLAY_POWER_STATE);
if (ret)
return ret;
if (intel_encoder->type == INTEL_OUTPUT_DSI)
port = 0;
else
port = intel_encoder->port;
if (port == PORT_E) {
port = 0;
} else {
parm |= 1 << port;
port++;
}
/*
* The port numbering and mapping here is bizarre. The now-obsolete
* swsci spec supports ports numbered [0..4]. Port E is handled as a
* special case, but port F and beyond are not. The functionality is
* supposed to be obsolete for new platforms. Just bail out if the port
* number is out of bounds after mapping.
*/
if (port > 4) {
drm_dbg_kms(&dev_priv->drm,
"[ENCODER:%d:%s] port %c (index %u) out of bounds for display power state notification\n",
intel_encoder->base.base.id, intel_encoder->base.name,
port_name(intel_encoder->port), port);
return -EINVAL;
}
if (!enable)
parm |= 4 << 8;
switch (intel_encoder->type) {
case INTEL_OUTPUT_ANALOG:
type = DISPLAY_TYPE_CRT;
break;
case INTEL_OUTPUT_DDI:
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:
drm_WARN_ONCE(&dev_priv->drm, 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 drm_connector_list_iter conn_iter;
struct opregion_asle *asle = dev_priv->display.opregion.asle;
drm_dbg(&dev_priv->drm, "bclp = 0x%08x\n", bclp);
if (acpi_video_get_backlight_type() == acpi_backlight_native) {
drm_dbg_kms(&dev_priv->drm,
"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_priv->drm.mode_config.connection_mutex, NULL);
/*
* Update backlight on all connectors that support backlight (usually
* only one).
*/
drm_dbg_kms(&dev_priv->drm, "updating opregion backlight %d/255\n",
bclp);
drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter)
intel_backlight_set_acpi(connector->base.state, bclp, 255);
drm_connector_list_iter_end(&conn_iter);
asle->cblv = DIV_ROUND_UP(bclp * 100, 255) | ASLE_CBLV_VALID;
drm_modeset_unlock(&dev_priv->drm.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_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm,
"Button array event is not supported (nothing)\n");
if (iuer & ASLE_IUER_ROTATION_LOCK_BTN)
drm_dbg(&dev_priv->drm,
"Button array event is not supported (rotation lock)\n");
if (iuer & ASLE_IUER_VOLUME_DOWN_BTN)
drm_dbg(&dev_priv->drm,
"Button array event is not supported (volume down)\n");
if (iuer & ASLE_IUER_VOLUME_UP_BTN)
drm_dbg(&dev_priv->drm,
"Button array event is not supported (volume up)\n");
if (iuer & ASLE_IUER_WINDOWS_BTN)
drm_dbg(&dev_priv->drm,
"Button array event is not supported (windows)\n");
if (iuer & ASLE_IUER_POWER_BTN)
drm_dbg(&dev_priv->drm,
"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_dbg(&dev_priv->drm,
"Convertible is not supported (clamshell)\n");
else
drm_dbg(&dev_priv->drm,
"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_dbg(&dev_priv->drm, "Docking is not supported (docked)\n");
else
drm_dbg(&dev_priv->drm,
"Docking is not supported (undocked)\n");
return ASLC_DOCKING_FAILED;
}
static u32 asle_isct_state(struct drm_i915_private *dev_priv)
{
drm_dbg(&dev_priv->drm, "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, display.opregion);
struct opregion_asle *asle = dev_priv->display.opregion.asle;
u32 aslc_stat = 0;
u32 aslc_req;
if (!asle)
return;
aslc_req = asle->aslc;
if (!(aslc_req & ASLC_REQ_MSK)) {
drm_dbg(&dev_priv->drm,
"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->display.opregion.asle)
schedule_work(&dev_priv->display.opregion.asle_work);
}
#define ACPI_EV_DISPLAY_SWITCH (1<<0)
#define ACPI_EV_LID (1<<1)
#define ACPI_EV_DOCK (1<<2)
/*
* 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.
*/
static int intel_opregion_video_event(struct notifier_block *nb,
unsigned long val, void *data)
{
struct intel_opregion *opregion = container_of(nb, struct intel_opregion,
acpi_notifier);
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;
acpi = opregion->acpi;
if (event->type == 0x80 && ((acpi->cevt & 1) == 0))
ret = NOTIFY_BAD;
acpi->csts = 0;
return ret;
}
/*
* 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 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 void intel_didl_outputs(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->display.opregion;
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
int i = 0, max_outputs;
/*
* 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);
intel_acpi_device_id_update(dev_priv);
drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
if (i < max_outputs)
set_did(opregion, i, connector->acpi_device_id);
i++;
}
drm_connector_list_iter_end(&conn_iter);
drm_dbg_kms(&dev_priv->drm, "%d outputs detected\n", i);
if (i > max_outputs)
drm_err(&dev_priv->drm,
"More than %d outputs in connector list\n",
max_outputs);
/* If fewer than max outputs, the list must be null terminated */
if (i < max_outputs)
set_did(opregion, i, 0);
}
static void intel_setup_cadls(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->display.opregion;
struct intel_connector *connector;
struct drm_connector_list_iter conn_iter;
int i = 0;
/*
* Initialize the CADL field from the connector device ids. This is
* essentially the same as copying from the DIDL. 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.
*
* Note that internal panels should be at the front of the connector
* list already, ensuring they're not left out.
*/
drm_connector_list_iter_begin(&dev_priv->drm, &conn_iter);
for_each_intel_connector_iter(connector, &conn_iter) {
if (i >= ARRAY_SIZE(opregion->acpi->cadl))
break;
opregion->acpi->cadl[i++] = connector->acpi_device_id;
}
drm_connector_list_iter_end(&conn_iter);
/* If fewer than 8 active devices, the list must be null terminated */
if (i < ARRAY_SIZE(opregion->acpi->cadl))
opregion->acpi->cadl[i] = 0;
}
static void swsci_setup(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->display.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_dbg(&dev_priv->drm,
"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_dbg(&dev_priv->drm,
"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"),
},
},
{ }
};
static int intel_load_vbt_firmware(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->display.opregion;
const struct firmware *fw = NULL;
const char *name = dev_priv->params.vbt_firmware;
int ret;
if (!name || !*name)
return -ENOENT;
ret = request_firmware(&fw, name, dev_priv->drm.dev);
if (ret) {
drm_err(&dev_priv->drm,
"Requesting VBT firmware \"%s\" failed (%d)\n",
name, ret);
return ret;
}
if (intel_bios_is_valid_vbt(fw->data, fw->size)) {
opregion->vbt_firmware = kmemdup(fw->data, fw->size, GFP_KERNEL);
if (opregion->vbt_firmware) {
drm_dbg_kms(&dev_priv->drm,
"Found valid VBT firmware \"%s\"\n", name);
opregion->vbt = opregion->vbt_firmware;
opregion->vbt_size = fw->size;
ret = 0;
} else {
ret = -ENOMEM;
}
} else {
drm_dbg_kms(&dev_priv->drm, "Invalid VBT firmware \"%s\"\n",
name);
ret = -EINVAL;
}
release_firmware(fw);
return ret;
}
int intel_opregion_setup(struct drm_i915_private *dev_priv)
{
struct intel_opregion *opregion = &dev_priv->display.opregion;
struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
u32 asls, mboxes;
char buf[sizeof(OPREGION_SIGNATURE)];
int err = 0;
void *base;
const void *vbt;
u32 vbt_size;
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_dbg(&dev_priv->drm, "graphic opregion physical addr: 0x%x\n",
asls);
if (asls == 0) {
drm_dbg(&dev_priv->drm, "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_dbg(&dev_priv->drm, "opregion signature mismatch\n");
err = -EINVAL;
goto err_out;
}
opregion->header = base;
opregion->lid_state = base + ACPI_CLID;
drm_dbg(&dev_priv->drm, "ACPI OpRegion version %u.%u.%u\n",
opregion->header->over.major,
opregion->header->over.minor,
opregion->header->over.revision);
mboxes = opregion->header->mboxes;
if (mboxes & MBOX_ACPI) {
drm_dbg(&dev_priv->drm, "Public ACPI methods supported\n");
opregion->acpi = base + OPREGION_ACPI_OFFSET;
/*
* Indicate we handle monitor hotplug events ourselves so we do
* not need ACPI notifications for them. Disabling these avoids
* triggering the AML code doing the notifation, which may be
* broken as Windows also seems to disable these.
*/
opregion->acpi->chpd = 1;
}
if (mboxes & MBOX_SWSCI) {
u8 major = opregion->header->over.major;
if (major >= 3) {
drm_err(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v3.x, ignoring\n");
} else {
if (major >= 2)
drm_dbg(&dev_priv->drm, "SWSCI Mailbox #2 present for opregion v2.x\n");
drm_dbg(&dev_priv->drm, "SWSCI supported\n");
opregion->swsci = base + OPREGION_SWSCI_OFFSET;
swsci_setup(dev_priv);
}
}
if (mboxes & MBOX_ASLE) {
drm_dbg(&dev_priv->drm, "ASLE supported\n");
opregion->asle = base + OPREGION_ASLE_OFFSET;
opregion->asle->ardy = ASLE_ARDY_NOT_READY;
}
if (mboxes & MBOX_ASLE_EXT) {
drm_dbg(&dev_priv->drm, "ASLE extension supported\n");
opregion->asle_ext = base + OPREGION_ASLE_EXT_OFFSET;
}
if (mboxes & MBOX_BACKLIGHT) {
drm_dbg(&dev_priv->drm, "Mailbox #2 for backlight present\n");
}
if (intel_load_vbt_firmware(dev_priv) == 0)
goto out;
if (dmi_check_system(intel_no_opregion_vbt))
goto out;
if (opregion->header->over.major >= 2 && opregion->asle &&
opregion->asle->rvda && opregion->asle->rvds) {
resource_size_t rvda = opregion->asle->rvda;
/*
* opregion 2.0: rvda is the physical VBT address.
*
* opregion 2.1+: rvda is unsigned, relative offset from
* opregion base, and should never point within opregion.
*/
if (opregion->header->over.major > 2 ||
opregion->header->over.minor >= 1) {
drm_WARN_ON(&dev_priv->drm, rvda < OPREGION_SIZE);
rvda += asls;
}
opregion->rvda = memremap(rvda, opregion->asle->rvds,
MEMREMAP_WB);
vbt = opregion->rvda;
vbt_size = opregion->asle->rvds;
if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
drm_dbg_kms(&dev_priv->drm,
"Found valid VBT in ACPI OpRegion (RVDA)\n");
opregion->vbt = vbt;
opregion->vbt_size = vbt_size;
goto out;
} else {
drm_dbg_kms(&dev_priv->drm,
"Invalid VBT in ACPI OpRegion (RVDA)\n");
memunmap(opregion->rvda);
opregion->rvda = NULL;
}
}
vbt = base + OPREGION_VBT_OFFSET;
/*
* The VBT specification says that if the ASLE ext mailbox is not used
* its area is reserved, but on some CHT boards the VBT extends into the
* ASLE ext area. Allow this even though it is against the spec, so we
* do not end up rejecting the VBT on those boards (and end up not
* finding the LCD panel because of this).
*/
vbt_size = (mboxes & MBOX_ASLE_EXT) ?
OPREGION_ASLE_EXT_OFFSET : OPREGION_SIZE;
vbt_size -= OPREGION_VBT_OFFSET;
if (intel_bios_is_valid_vbt(vbt, vbt_size)) {
drm_dbg_kms(&dev_priv->drm,
"Found valid VBT in ACPI OpRegion (Mailbox #4)\n");
opregion->vbt = vbt;
opregion->vbt_size = vbt_size;
} else {
drm_dbg_kms(&dev_priv->drm,
"Invalid VBT in ACPI OpRegion (Mailbox #4)\n");
}
out:
return 0;
err_out:
memunmap(base);
return err;
}
static int intel_use_opregion_panel_type_callback(const struct dmi_system_id *id)
{
DRM_INFO("Using panel type from OpRegion on %s\n", id->ident);
return 1;
}
static const struct dmi_system_id intel_use_opregion_panel_type[] = {
{
.callback = intel_use_opregion_panel_type_callback,
.ident = "Conrac GmbH IX45GM2",
.matches = {DMI_MATCH(DMI_SYS_VENDOR, "Conrac GmbH"),
DMI_MATCH(DMI_PRODUCT_NAME, "IX45GM2"),
},
},
{ }
};
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)
return ret;
ret = (panel_details >> 8) & 0xff;
if (ret > 0x10) {
drm_dbg_kms(&dev_priv->drm,
"Invalid OpRegion panel type 0x%x\n", ret);
return -EINVAL;
}
/* fall back to VBT panel type? */
if (ret == 0x0) {
drm_dbg_kms(&dev_priv->drm, "No panel type in OpRegion\n");
return -ENODEV;
}
/*
* So far we know that some machined must use it, others must not use it.
* There doesn't seem to be any way to determine which way to go, except
* via a quirk list :(
*/
if (!dmi_check_system(intel_use_opregion_panel_type)) {
drm_dbg_kms(&dev_priv->drm,
"Ignoring OpRegion panel type (%d)\n", ret - 1);
return -ENODEV;
}
return ret - 1;
}
/**
* intel_opregion_get_edid - Fetch EDID from ACPI OpRegion mailbox #5
* @intel_connector: eDP connector
*
* This reads the ACPI Opregion mailbox #5 to extract the EDID that is passed
* to it.
*
* Returns:
* The EDID in the OpRegion, or NULL if there is none or it's invalid.
*
*/
const struct drm_edid *intel_opregion_get_edid(struct intel_connector *intel_connector)
{
struct drm_connector *connector = &intel_connector->base;
struct drm_i915_private *i915 = to_i915(connector->dev);
struct intel_opregion *opregion = &i915->display.opregion;
const struct drm_edid *drm_edid;
const void *edid;
int len;
if (!opregion->asle_ext)
return NULL;
edid = opregion->asle_ext->bddc;
/* Validity corresponds to number of 128-byte blocks */
len = (opregion->asle_ext->phed & ASLE_PHED_EDID_VALID_MASK) * 128;
if (!len || !memchr_inv(edid, 0, len))
return NULL;
drm_edid = drm_edid_alloc(edid, len);
if (!drm_edid_valid(drm_edid)) {
drm_dbg_kms(&i915->drm, "Invalid EDID in ACPI OpRegion (Mailbox #5)\n");
drm_edid_free(drm_edid);
drm_edid = NULL;
}
return drm_edid;
}
bool intel_opregion_headless_sku(struct drm_i915_private *i915)
{
struct intel_opregion *opregion = &i915->display.opregion;
struct opregion_header *header = opregion->header;
if (!header || header->over.major < 2 ||
(header->over.major == 2 && header->over.minor < 3))
return false;
return opregion->header->pcon & PCON_HEADLESS_SKU;
}
void intel_opregion_register(struct drm_i915_private *i915)
{
struct intel_opregion *opregion = &i915->display.opregion;
if (!opregion->header)
return;
if (opregion->acpi) {
opregion->acpi_notifier.notifier_call =
intel_opregion_video_event;
register_acpi_notifier(&opregion->acpi_notifier);
}
intel_opregion_resume(i915);
}
void intel_opregion_resume(struct drm_i915_private *i915)
{
struct intel_opregion *opregion = &i915->display.opregion;
if (!opregion->header)
return;
if (opregion->acpi) {
intel_didl_outputs(i915);
intel_setup_cadls(i915);
/*
* 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;
}
if (opregion->asle) {
opregion->asle->tche = ASLE_TCHE_BLC_EN;
opregion->asle->ardy = ASLE_ARDY_READY;
}
/* Some platforms abuse the _DSM to enable MUX */
intel_dsm_get_bios_data_funcs_supported(i915);
intel_opregion_notify_adapter(i915, PCI_D0);
}
void intel_opregion_suspend(struct drm_i915_private *i915, pci_power_t state)
{
struct intel_opregion *opregion = &i915->display.opregion;
if (!opregion->header)
return;
intel_opregion_notify_adapter(i915, state);
if (opregion->asle)
opregion->asle->ardy = ASLE_ARDY_NOT_READY;
cancel_work_sync(&i915->display.opregion.asle_work);
if (opregion->acpi)
opregion->acpi->drdy = 0;
}
void intel_opregion_unregister(struct drm_i915_private *i915)
{
struct intel_opregion *opregion = &i915->display.opregion;
intel_opregion_suspend(i915, PCI_D1);
if (!opregion->header)
return;
if (opregion->acpi_notifier.notifier_call) {
unregister_acpi_notifier(&opregion->acpi_notifier);
opregion->acpi_notifier.notifier_call = NULL;
}
/* just clear all opregion memory pointers now */
memunmap(opregion->header);
if (opregion->rvda) {
memunmap(opregion->rvda);
opregion->rvda = NULL;
}
if (opregion->vbt_firmware) {
kfree(opregion->vbt_firmware);
opregion->vbt_firmware = NULL;
}
opregion->header = NULL;
opregion->acpi = NULL;
opregion->swsci = NULL;
opregion->asle = NULL;
opregion->asle_ext = NULL;
opregion->vbt = NULL;
opregion->lid_state = NULL;
}