drm/nouveau/gpio: remove invert flag, use state[] everywhere

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

drivers/gpu/drm/nouveau/nouveau_bios.c

@@ -5834,7 +5834,8 @@ parse_dcb_gpio_table(struct nvbios *bios)
 			e = new_gpio_entry(bios);
 			e->tag = DCB_GPIO_TVDAC0;
 			e->line = tvdac_gpio[1] >> 4;
-			e->invert = tvdac_gpio[0] & 2;
+			e->state[0] = !!(tvdac_gpio[0] & 2);
+			e->state[1] = !e->state[0];
 		}
 
 		goto no_table;
@@ -5858,7 +5859,8 @@ parse_dcb_gpio_table(struct nvbios *bios)
 			}
 
 			e->line = (e->entry & 0x001f);
-			e->invert = ((e->entry & 0xf800) >> 11) != 4;
+			e->state[0] = ((e->entry & 0xf800) >> 11) != 4;
+			e->state[1] = !e->state[0];
 		} else {
 			e->entry = ROM32(entry[0]);
 			e->tag = (e->entry & 0x0000ff00) >> 8;

drivers/gpu/drm/nouveau/nouveau_bios.h

@@ -65,7 +65,6 @@ enum dcb_gpio_tag {
 struct dcb_gpio_entry {
 	enum dcb_gpio_tag tag;
 	int line;
-	bool invert;
 	uint32_t entry;
 	uint8_t state_default;
 	uint8_t state[2];

drivers/gpu/drm/nouveau/nv10_gpio.c

@@ -68,7 +68,7 @@ nv10_gpio_get(struct drm_device *dev, enum dcb_gpio_tag tag)
 
 	value = NVReadCRTC(dev, 0, reg) >> shift;
 
-	return (ent->invert ? 1 : 0) ^ (value & 1);
+	return (value & 1) == ent->state[1];
 }
 
 int
@@ -83,7 +83,7 @@ nv10_gpio_set(struct drm_device *dev, enum dcb_gpio_tag tag, int state)
 	if (!get_gpio_location(ent, &reg, &shift, &mask))
 		return -ENODEV;
 
-	value = ((ent->invert ? 1 : 0) ^ (state ? 1 : 0)) << shift;
+	value = ent->state[state & 1] << shift;
 	mask = ~(mask << shift);
 
 	NVWriteCRTC(dev, 0, reg, value | (NVReadCRTC(dev, 0, reg) & mask));