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

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>

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
index 48783e1..d97f200 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -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);
@@ -283,24 +289,24 @@ 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 DSM switching method %s handle\n",
+               printk(KERN_INFO "VGA switcheroo: detected Optimus DSM method %s handle\n",
                        acpi_method_name);
-               nouveau_dsm_priv.dsm_detected = true;
+               nouveau_dsm_priv.optimus_detected = true;
                ret = true;
-       }
-
-       if (has_optimus == 1) {
+       } 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 Optimus DSM method %s handle\n",
+               printk(KERN_INFO "VGA switcheroo: detected DSM switching method %s handle\n",
                        acpi_method_name);
-               nouveau_dsm_priv.optimus_detected = true;
+               nouveau_dsm_priv.dsm_detected = true;
                ret = true;
        }
 
+
        return ret;
 }
 

diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.h b/drivers/gpu/drm/nouveau/nouveau_acpi.h
index 08af677..d0da230 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.h
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.h
@@ -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) {}