mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Lukas Wunner](/assets/img/avatar_default.png)
Commit 599bbb9de0
("drm/i915: i915 cannot provide switcher services.")
removed all remaining vga_switcheroo symbols from intel_acpi.c but left
the include. Drop it.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
164 lines
3.6 KiB
C
164 lines
3.6 KiB
C
/*
|
|
* Intel ACPI functions
|
|
*
|
|
* _DSM related code stolen from nouveau_acpi.c.
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/acpi.h>
|
|
#include <drm/drmP.h>
|
|
#include "i915_drv.h"
|
|
|
|
#define INTEL_DSM_REVISION_ID 1 /* For Calpella anyway... */
|
|
#define INTEL_DSM_FN_PLATFORM_MUX_INFO 1 /* No args */
|
|
|
|
static struct intel_dsm_priv {
|
|
acpi_handle dhandle;
|
|
} intel_dsm_priv;
|
|
|
|
static const u8 intel_dsm_guid[] = {
|
|
0xd3, 0x73, 0xd8, 0x7e,
|
|
0xd0, 0xc2,
|
|
0x4f, 0x4e,
|
|
0xa8, 0x54,
|
|
0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
|
|
};
|
|
|
|
static char *intel_dsm_port_name(u8 id)
|
|
{
|
|
switch (id) {
|
|
case 0:
|
|
return "Reserved";
|
|
case 1:
|
|
return "Analog VGA";
|
|
case 2:
|
|
return "LVDS";
|
|
case 3:
|
|
return "Reserved";
|
|
case 4:
|
|
return "HDMI/DVI_B";
|
|
case 5:
|
|
return "HDMI/DVI_C";
|
|
case 6:
|
|
return "HDMI/DVI_D";
|
|
case 7:
|
|
return "DisplayPort_A";
|
|
case 8:
|
|
return "DisplayPort_B";
|
|
case 9:
|
|
return "DisplayPort_C";
|
|
case 0xa:
|
|
return "DisplayPort_D";
|
|
case 0xb:
|
|
case 0xc:
|
|
case 0xd:
|
|
return "Reserved";
|
|
case 0xe:
|
|
return "WiDi";
|
|
default:
|
|
return "bad type";
|
|
}
|
|
}
|
|
|
|
static char *intel_dsm_mux_type(u8 type)
|
|
{
|
|
switch (type) {
|
|
case 0:
|
|
return "unknown";
|
|
case 1:
|
|
return "No MUX, iGPU only";
|
|
case 2:
|
|
return "No MUX, dGPU only";
|
|
case 3:
|
|
return "MUXed between iGPU and dGPU";
|
|
default:
|
|
return "bad type";
|
|
}
|
|
}
|
|
|
|
static void intel_dsm_platform_mux_info(void)
|
|
{
|
|
int i;
|
|
union acpi_object *pkg, *connector_count;
|
|
|
|
pkg = acpi_evaluate_dsm_typed(intel_dsm_priv.dhandle, intel_dsm_guid,
|
|
INTEL_DSM_REVISION_ID, INTEL_DSM_FN_PLATFORM_MUX_INFO,
|
|
NULL, ACPI_TYPE_PACKAGE);
|
|
if (!pkg) {
|
|
DRM_DEBUG_DRIVER("failed to evaluate _DSM\n");
|
|
return;
|
|
}
|
|
|
|
connector_count = &pkg->package.elements[0];
|
|
DRM_DEBUG_DRIVER("MUX info connectors: %lld\n",
|
|
(unsigned long long)connector_count->integer.value);
|
|
for (i = 1; i < pkg->package.count; i++) {
|
|
union acpi_object *obj = &pkg->package.elements[i];
|
|
union acpi_object *connector_id = &obj->package.elements[0];
|
|
union acpi_object *info = &obj->package.elements[1];
|
|
DRM_DEBUG_DRIVER("Connector id: 0x%016llx\n",
|
|
(unsigned long long)connector_id->integer.value);
|
|
DRM_DEBUG_DRIVER(" port id: %s\n",
|
|
intel_dsm_port_name(info->buffer.pointer[0]));
|
|
DRM_DEBUG_DRIVER(" display mux info: %s\n",
|
|
intel_dsm_mux_type(info->buffer.pointer[1]));
|
|
DRM_DEBUG_DRIVER(" aux/dc mux info: %s\n",
|
|
intel_dsm_mux_type(info->buffer.pointer[2]));
|
|
DRM_DEBUG_DRIVER(" hpd mux info: %s\n",
|
|
intel_dsm_mux_type(info->buffer.pointer[3]));
|
|
}
|
|
|
|
ACPI_FREE(pkg);
|
|
}
|
|
|
|
static bool intel_dsm_pci_probe(struct pci_dev *pdev)
|
|
{
|
|
acpi_handle dhandle;
|
|
|
|
dhandle = ACPI_HANDLE(&pdev->dev);
|
|
if (!dhandle)
|
|
return false;
|
|
|
|
if (!acpi_check_dsm(dhandle, intel_dsm_guid, INTEL_DSM_REVISION_ID,
|
|
1 << INTEL_DSM_FN_PLATFORM_MUX_INFO)) {
|
|
DRM_DEBUG_KMS("no _DSM method for intel device\n");
|
|
return false;
|
|
}
|
|
|
|
intel_dsm_priv.dhandle = dhandle;
|
|
intel_dsm_platform_mux_info();
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool intel_dsm_detect(void)
|
|
{
|
|
char acpi_method_name[255] = { 0 };
|
|
struct acpi_buffer buffer = {sizeof(acpi_method_name), acpi_method_name};
|
|
struct pci_dev *pdev = NULL;
|
|
bool has_dsm = false;
|
|
int vga_count = 0;
|
|
|
|
while ((pdev = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, pdev)) != NULL) {
|
|
vga_count++;
|
|
has_dsm |= intel_dsm_pci_probe(pdev);
|
|
}
|
|
|
|
if (vga_count == 2 && has_dsm) {
|
|
acpi_get_name(intel_dsm_priv.dhandle, ACPI_FULL_PATHNAME, &buffer);
|
|
DRM_DEBUG_DRIVER("vga_switcheroo: detected DSM switching method %s handle\n",
|
|
acpi_method_name);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
void intel_register_dsm_handler(void)
|
|
{
|
|
if (!intel_dsm_detect())
|
|
return;
|
|
}
|
|
|
|
void intel_unregister_dsm_handler(void)
|
|
{
|
|
}
|