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drm/nouveau: Add interface to detect optimus and v1 support

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This is required to decide if we can auto-powerdown and how to implement it.

Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Dave Airlie 2012-11-02 11:04:27 +10:00 committed by Ben Skeggs
parent bf2c886a85
commit c839d748bd
2 changed files with 23 additions and 13 deletions
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32
drivers/gpu/drm/nouveau/nouveau_acpi.c
View file

@ -35,6 +35,14 @@ static struct nouveau_dsm_priv {
acpi_handle rom_handle;
} nouveau_dsm_priv;
bool nouveau_is_optimus(void) {
return nouveau_dsm_priv.optimus_detected;
}
bool nouveau_is_v1_dsm(void) {
return nouveau_dsm_priv.dsm_detected;
}
#define NOUVEAU_DSM_HAS_MUX 0x1
#define NOUVEAU_DSM_HAS_OPT 0x2
@ -183,9 +191,7 @@ 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)
if (!nouveau_dsm_priv.dsm_detected)
return 0;
if (id == VGA_SWITCHEROO_IGD)
return nouveau_dsm_switch_mux(nouveau_dsm_priv.dhandle, NOUVEAU_DSM_LED_STAMINA);
@ -201,7 +207,7 @@ static int nouveau_dsm_power_state(enum vga_switcheroo_client_id id,
/* Optimus laptops have the card already disabled in
* nouveau_switcheroo_set_state */
if (!nouveau_dsm_priv.dsm_detected && nouveau_dsm_priv.optimus_detected)
if (!nouveau_dsm_priv.dsm_detected)
return 0;
return nouveau_dsm_set_discrete_state(nouveau_dsm_priv.dhandle, state);
@ -283,7 +289,15 @@ static bool nouveau_dsm_detect(void)
has_optimus = 1;
}
if (vga_count == 2 && has_dsm && guid_valid) {
/* find the optimus DSM or the old v1 DSM */
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;
} else if (vga_count == 2 && has_dsm && guid_valid) {
acpi_get_name(nouveau_dsm_priv.dhandle, ACPI_FULL_PATHNAME,
&buffer);
printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
@ -292,14 +306,6 @@ static bool nouveau_dsm_detect(void)
ret = true;
}
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;
}

4
drivers/gpu/drm/nouveau/nouveau_acpi.h
View file

@ -4,6 +4,8 @@
#define ROM_BIOS_PAGE 4096
#if defined(CONFIG_ACPI)
bool nouveau_is_optimus(void);
bool nouveau_is_v1_dsm(void);
void nouveau_register_dsm_handler(void);
void nouveau_unregister_dsm_handler(void);
void nouveau_switcheroo_optimus_dsm(void);
@ -11,6 +13,8 @@ int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len);
bool nouveau_acpi_rom_supported(struct pci_dev *pdev);
void *nouveau_acpi_edid(struct drm_device *, struct drm_connector *);
#else
static inline bool nouveau_is_optimus(void) { return false; };
static inline bool nouveau_is_v1_dsm(void) { return false; };
static inline void nouveau_register_dsm_handler(void) {}
static inline void nouveau_unregister_dsm_handler(void) {}
static inline void nouveau_switcheroo_optimus_dsm(void) {}