diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_acpi.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_acpi.c | 79 |
1 files changed, 61 insertions, 18 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index 525744d593c..7814a760c16 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -18,12 +18,6 @@ #include <linux/vga_switcheroo.h> -#define NOUVEAU_DSM_SUPPORTED 0x00 -#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00 - -#define NOUVEAU_DSM_ACTIVE 0x01 -#define NOUVEAU_DSM_ACTIVE_QUERY 0x00 - #define NOUVEAU_DSM_LED 0x02 #define NOUVEAU_DSM_LED_STATE 0x00 #define NOUVEAU_DSM_LED_OFF 0x10 @@ -35,6 +29,9 @@ #define NOUVEAU_DSM_POWER_SPEED 0x01 #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; @@ -61,7 +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; @@ -73,7 +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) { @@ -148,6 +150,23 @@ static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result) return 0; } +/* Returns 1 if a DSM function is usable and 0 otherwise */ +static int nouveau_test_dsm(acpi_handle test_handle, + int (*dsm_func)(acpi_handle, int, int, uint32_t *), + int sfnc) +{ + u32 result = 0; + + /* Function 0 returns a Buffer containing available functions. The args + * parameter is ignored for function 0, so just put 0 in it */ + if (dsm_func(test_handle, 0, 0, &result)) + return 0; + + /* ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. If + * the n-th bit is enabled, function n is supported */ + return result & 1 && result & (1 << sfnc); +} + static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id) { mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0); @@ -168,6 +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 @@ -180,6 +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); } @@ -212,8 +240,7 @@ static int nouveau_dsm_pci_probe(struct pci_dev *pdev) { acpi_handle dhandle, nvidia_handle; acpi_status status; - int ret, retval = 0; - uint32_t result; + int retval = 0; dhandle = DEVICE_ACPI_HANDLE(&pdev->dev); if (!dhandle) @@ -224,13 +251,11 @@ static int nouveau_dsm_pci_probe(struct pci_dev *pdev) return false; } - ret = nouveau_dsm(dhandle, NOUVEAU_DSM_SUPPORTED, - NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &result); - if (ret == 0) + if (nouveau_test_dsm(dhandle, nouveau_dsm, NOUVEAU_DSM_POWER)) retval |= NOUVEAU_DSM_HAS_MUX; - ret = nouveau_optimus_dsm(dhandle, 0, 0, &result); - if (ret == 0) + if (nouveau_test_dsm(dhandle, nouveau_optimus_dsm, + NOUVEAU_DSM_OPTIMUS_FN)) retval |= NOUVEAU_DSM_HAS_OPT; if (retval) @@ -269,15 +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; } @@ -293,6 +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(); |