From d099230cc355c485e556121c034b1fca5a5fd18b Mon Sep 17 00:00:00 2001 From: Peter Lekensteyn Date: Sat, 17 Dec 2011 12:54:04 +0100 Subject: [PATCH] nouveau: Support Optimus models for vga_switcheroo Newer nVidia cards with Optimus do not support/use the DSM switching functions. Instead, it require a DSM function to be called prior to bringing a device into D3 state. No other _DSM calls are necessary before/after enabling/disabling a device. Switching between discrete and integrated GPU is not supported by this Optimus _DSM call, therefore return on the switching method. Signed-off-by: Peter Lekensteyn Signed-off-by: Dave Airlie --- drivers/gpu/drm/nouveau/nouveau_acpi.c | 44 ++++++++++++++++++++++--- drivers/gpu/drm/nouveau/nouveau_drv.h | 2 ++ drivers/gpu/drm/nouveau/nouveau_state.c | 1 + 3 files changed, 42 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index 96756d0d6411..7814a760c164 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -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(); diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h index 38134a9c7578..b82709828931 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drv.h +++ b/drivers/gpu/drm/nouveau/nouveau_drv.h @@ -1055,12 +1055,14 @@ 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; } diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c index f5e98910d17f..f80c5e0762ff 100644 --- a/drivers/gpu/drm/nouveau/nouveau_state.c +++ b/drivers/gpu/drm/nouveau/nouveau_state.c @@ -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; } -- 2.20.1