drm/nvd0/gpio: initial implementation

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

4 files changed, 48 insertions, 4 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index b311faba34f8..30e723c81069 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -5884,9 +5884,15 @@ parse_dcb_gpio_table(struct nvbios *bios)
                         }
 
                         e->line = (e->entry & 0x0000001f) >> 0;
-                        e->state_default = (e->entry & 0x01000000) >> 24;
-                        e->state[0] = (e->entry & 0x18000000) >> 27;
-                        e->state[1] = (e->entry & 0x60000000) >> 29;
+                        if (gpio[0] == 0x40) {
+                                e->state_default = (e->entry & 0x01000000) >> 24;
+                                e->state[0] = (e->entry & 0x18000000) >> 27;
+                                e->state[1] = (e->entry & 0x60000000) >> 29;
+                        } else {
+                                e->state_default = (e->entry & 0x00000080) >> 7;
+                                e->state[0] = (entry[4] >> 4) & 3;
+                                e->state[1] = (entry[4] >> 6) & 3;
+                        }
                 }
         }
 
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index 7fdfad03f96c..721845add9b2 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -1391,6 +1391,8 @@ int nv50_gpio_init(struct drm_device *dev);
 void nv50_gpio_fini(struct drm_device *dev);
 int nv50_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag);
 int nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state);
+int nvd0_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag);
+int nvd0_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state);
 int  nv50_gpio_irq_register(struct drm_device *, enum dcb_gpio_tag,
                             void (*)(void *, int), void *);
 void nv50_gpio_irq_unregister(struct drm_device *, enum dcb_gpio_tag,
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index 10b201102231..8cf42e223fc3 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -459,8 +459,13 @@ static int nouveau_init_engine_ptrs(struct drm_device *dev)
                 engine->display.create          = nouveau_stub_init;
                 engine->display.init            = nouveau_stub_init;
                 engine->display.destroy         = nouveau_stub_takedown;
-                engine->gpio.init               = nouveau_stub_init;
+                engine->gpio.init               = nv50_gpio_init;
                 engine->gpio.takedown           = nouveau_stub_takedown;
+                engine->gpio.get                = nvd0_gpio_get;
+                engine->gpio.set                = nvd0_gpio_set;
+                engine->gpio.irq_register       = nv50_gpio_irq_register;
+                engine->gpio.irq_unregister     = nv50_gpio_irq_unregister;
+                engine->gpio.irq_enable         = nv50_gpio_irq_enable;
                 engine->vram.init               = nvc0_vram_init;
                 engine->vram.takedown           = nv50_vram_fini;
                 engine->vram.get                = nvc0_vram_new;
diff --git a/drivers/gpu/drm/nouveau/nv50_gpio.c b/drivers/gpu/drm/nouveau/nv50_gpio.c
index d4f4206dad7e..793a5ccca121 100644
--- a/drivers/gpu/drm/nouveau/nv50_gpio.c
+++ b/drivers/gpu/drm/nouveau/nv50_gpio.c
@@ -98,6 +98,37 @@ nv50_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
 }
 
 int
+nvd0_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
+{
+        struct dcb_gpio_entry *gpio;
+        u32 v;
+
+        gpio = nouveau_bios_gpio_entry(dev, tag);
+        if (!gpio)
+                return -ENOENT;
+
+        v  = nv_rd32(dev, 0x00d610 + (gpio->line * 4));
+        v &= 0x00004000;
+        return (!!v == (gpio->state[1] & 1));
+}
+
+int
+nvd0_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
+{
+        struct dcb_gpio_entry *gpio;
+        u32 v;
+
+        gpio = nouveau_bios_gpio_entry(dev, tag);
+        if (!gpio)
+                return -ENOENT;
+
+        v = gpio->state[state] ^ 2;
+
+        nv_mask(dev, 0x00d610 + (gpio->line * 4), 0x00003000, v << 12);
+        return 0;
+}
+
+int
 nv50_gpio_irq_register(struct drm_device *dev, enum dcb_gpio_tag tag,
                        void (*handler)(void *, int), void *data)
 {