@@ -30,6 +30,8 @@
#define NOUVEAU_DSM_POWER_STAMINA 0x02
#define NOUVEAU_DSM_OPTIMUS_FN 0x1A
+#define NOUVEAU_DSM_OPTIMUS_ARGS 0x03000001
+
static struct nouveau_dsm_priv {
bool dsm_detected;
bool optimus_detected;
@@ -56,7 +58,8 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
struct acpi_object_list input;
union acpi_object params[4];
union acpi_object *obj;
- int err;
+ int i, err;
+ char args_buff[4];
input.count = 4;
input.pointer = params;
@@ -68,7 +71,11 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *
params[2].type = ACPI_TYPE_INTEGER;
params[2].integer.value = func;
params[3].type = ACPI_TYPE_BUFFER;
- params[3].buffer.length = 0;
+ params[3].buffer.length = 4;
+ /* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */
+ for (i = 0; i < 4; i++)
+ args_buff[i] = (arg >> i * 8) & 0xFF;
+ params[3].buffer.pointer = args_buff;
err = acpi_evaluate_object(handle, "_DSM", &input, &output);
if (err) {
@@ -180,6 +187,10 @@ static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switchero
static int nouveau_dsm_switchto(enum vga_switcheroo_client_id id)
{
+ /* perhaps the _DSM functions are mutually exclusive, but prepare for
+ * the future */
+ if (!nouveau_dsm_priv.dsm_detected && nouveau_dsm_priv.optimus_detected)
+ return 0;
if (id == VGA_SWITCHEROO_IGD)
return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
else
@@ -192,6 +203,11 @@ static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
if (id == VGA_SWITCHEROO_IGD)
return 0;
+ /* Optimus laptops have the card already disabled in
+ * nouveau_switcheroo_set_state */
+ if (!nouveau_dsm_priv.dsm_detected && nouveau_dsm_priv.optimus_detected)
+ return 0;
+
return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
}
@@ -278,15 +294,22 @@ static bool nouveau_dsm_detect(void)
}
if (vga_count == 2 && has_dsm && guid_valid) {
- acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME, &buffer);
+ acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
+ &buffer);
printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
- acpi_method_name);
+ acpi_method_name);
nouveau_dsm_priv.dsm_detected = true;
ret = true;
}
- if (has_optimus == 1)
+ if (has_optimus == 1) {
+ acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
+ &buffer);
+ printk(KERN_INFO "VGA switcheroo: detected Optimus DSM method %s handle\n",
+ acpi_method_name);
nouveau_dsm_priv.optimus_detected = true;
+ ret = true;
+ }
return ret;
}
@@ -302,6 +325,17 @@ void nouveau_register_dsm_handler(void)
vga_switcheroo_register_handler(&nouveau_dsm_handler);
}
+/* Must be called for Optimus models before the card can be turned off */
+void nouveau_switcheroo_optimus_dsm(void)
+{
+ u32 result = 0;
+ if (!nouveau_dsm_priv.optimus_detected)
+ return;
+
+ nouveau_optimus_dsm(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_OPTIMUS_FN,
+ NOUVEAU_DSM_OPTIMUS_ARGS, &result);
+}
+
void nouveau_unregister_dsm_handler(void)
{
vga_switcheroo_unregister_handler();
@@ -1041,12 +1041,14 @@ extern int nouveau_dma_wait(struct nouveau_channel *, int slots, int size);
#if defined(CONFIG_ACPI)
void nouveau_register_dsm_handler(void);
void nouveau_unregister_dsm_handler(void);
+void nouveau_switcheroo_optimus_dsm(void);
int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len);
bool nouveau_acpi_rom_supported(struct pci_dev *pdev);
int nouveau_acpi_edid(struct drm_device *, struct drm_connector *);
#else
static inline void nouveau_register_dsm_handler(void) {}
static inline void nouveau_unregister_dsm_handler(void) {}
+static inline void nouveau_switcheroo_optimus_dsm(void) {}
static inline bool nouveau_acpi_rom_supported(struct pci_dev *pdev) { return false; }
static inline int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len) { return -EINVAL; }
static inline int nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector) { return -EINVAL; }
@@ -525,6 +525,7 @@ static void nouveau_switcheroo_set_state(struct pci_dev *pdev,
printk(KERN_ERR "VGA switcheroo: switched nouveau off\n");
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
drm_kms_helper_poll_disable(dev);
+ nouveau_switcheroo_optimus_dsm();
nouveau_pci_suspend(pdev, pmm);
dev->switch_power_state = DRM_SWITCH_POWER_OFF;
}