mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
13876c6e5f
Signed-off-by: Matthew Garrett <mjg@redhat.com> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acpi_bus.h>
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#include "drmP.h"
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#include "drm.h"
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#include "drm_sarea.h"
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#include "drm_crtc_helper.h"
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#include "nouveau_drv.h"
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#include "nouveau_drm.h"
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#include "nv50_display.h"
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#define NOUVEAU_DSM_SUPPORTED 0x00
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#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00
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#define NOUVEAU_DSM_ACTIVE 0x01
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#define NOUVEAU_DSM_ACTIVE_QUERY 0x00
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#define NOUVEAU_DSM_LED 0x02
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#define NOUVEAU_DSM_LED_STATE 0x00
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#define NOUVEAU_DSM_LED_OFF 0x10
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#define NOUVEAU_DSM_LED_STAMINA 0x11
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#define NOUVEAU_DSM_LED_SPEED 0x12
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#define NOUVEAU_DSM_POWER 0x03
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#define NOUVEAU_DSM_POWER_STATE 0x00
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#define NOUVEAU_DSM_POWER_SPEED 0x01
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#define NOUVEAU_DSM_POWER_STAMINA 0x02
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static int nouveau_dsm(struct drm_device *dev, int func, int arg, int *result)
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{
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static char muid[] = {
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0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
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0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
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};
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struct pci_dev *pdev = dev->pdev;
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struct acpi_handle *handle;
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
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struct acpi_object_list input;
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union acpi_object params[4];
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union acpi_object *obj;
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int err;
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handle = DEVICE_ACPI_HANDLE(&pdev->dev);
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if (!handle)
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return -ENODEV;
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input.count = 4;
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input.pointer = params;
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params[0].type = ACPI_TYPE_BUFFER;
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params[0].buffer.length = sizeof(muid);
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params[0].buffer.pointer = (char *)muid;
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params[1].type = ACPI_TYPE_INTEGER;
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params[1].integer.value = 0x00000102;
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params[2].type = ACPI_TYPE_INTEGER;
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params[2].integer.value = func;
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params[3].type = ACPI_TYPE_INTEGER;
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params[3].integer.value = arg;
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err = acpi_evaluate_object(handle, "_DSM", &input, &output);
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if (err) {
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NV_INFO(dev, "failed to evaluate _DSM: %d\n", err);
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return err;
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}
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obj = (union acpi_object *)output.pointer;
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if (obj->type == ACPI_TYPE_INTEGER)
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if (obj->integer.value == 0x80000002)
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return -ENODEV;
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if (obj->type == ACPI_TYPE_BUFFER) {
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if (obj->buffer.length == 4 && result) {
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*result = 0;
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*result |= obj->buffer.pointer[0];
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*result |= (obj->buffer.pointer[1] << 8);
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*result |= (obj->buffer.pointer[2] << 16);
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*result |= (obj->buffer.pointer[3] << 24);
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}
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}
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kfree(output.pointer);
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return 0;
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}
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int nouveau_hybrid_setup(struct drm_device *dev)
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{
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int result;
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if (nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_STATE,
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&result))
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return -ENODEV;
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NV_INFO(dev, "_DSM hardware status gave 0x%x\n", result);
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if (result) { /* Ensure that the external GPU is enabled */
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nouveau_dsm(dev, NOUVEAU_DSM_LED, NOUVEAU_DSM_LED_SPEED, NULL);
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nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_SPEED,
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NULL);
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} else { /* Stamina mode - disable the external GPU */
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nouveau_dsm(dev, NOUVEAU_DSM_LED, NOUVEAU_DSM_LED_STAMINA,
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NULL);
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nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_STAMINA,
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NULL);
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}
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return 0;
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}
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bool nouveau_dsm_probe(struct drm_device *dev)
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{
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int support = 0;
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if (nouveau_dsm(dev, NOUVEAU_DSM_SUPPORTED,
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NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &support))
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return false;
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if (!support)
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return false;
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return true;
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}
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