drm/nouveau: remove legacy vbios type detection

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

1 files changed, 20 insertions, 42 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
index 865eddfa30a7..9a69e0b131bf 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bios.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -2052,45 +2052,27 @@ uint8_t *nouveau_bios_embedded_edid(struct drm_device *dev)
 static bool NVInitVBIOS(struct drm_device *dev)
 {
         struct nouveau_drm *drm = nouveau_drm(dev);
-        struct nvbios *bios = &drm->vbios;
-
-        memset(bios, 0, sizeof(struct nvbios));
-        spin_lock_init(&bios->lock);
-        bios->dev = dev;
-
-        bios->data = nouveau_bios(drm->device)->data;
-        bios->length = nouveau_bios(drm->device)->size;
-        return true;
-}
+        struct nouveau_bios *bios = nouveau_bios(drm->device);
+        struct nvbios *legacy = &drm->vbios;
+
+        memset(legacy, 0, sizeof(struct nvbios));
+        spin_lock_init(&legacy->lock);
+        legacy->dev = dev;
+
+        legacy->data = bios->data;
+        legacy->length = bios->size;
+        if (bios->bit_offset) {
+                legacy->type = NVBIOS_BIT;
+                legacy->offset = bios->bit_offset;
+                return !parse_bit_structure(legacy, legacy->offset + 6);
+        } else
+        if (bios->bmp_offset) {
+                legacy->type = NVBIOS_BMP;
+                legacy->offset = bios->bmp_offset;
+                return !parse_bmp_structure(dev, legacy, legacy->offset);
+        }
 
-static int nouveau_parse_vbios_struct(struct drm_device *dev)
-{
-        struct nouveau_drm *drm = nouveau_drm(dev);
-        struct nvbios *bios = &drm->vbios;
-        const uint8_t bit_signature[] = { 0xff, 0xb8, 'B', 'I', 'T' };
-        const uint8_t bmp_signature[] = { 0xff, 0x7f, 'N', 'V', 0x0 };
-        int offset;
-
-        offset = findstr(bios->data, bios->length,
-                                        bit_signature, sizeof(bit_signature));
-        if (offset) {
-                NV_INFO(drm, "BIT BIOS found\n");
-                bios->type = NVBIOS_BIT;
-                bios->offset = offset;
-                return parse_bit_structure(bios, offset + 6);
-        }
-
-        offset = findstr(bios->data, bios->length,
-                                        bmp_signature, sizeof(bmp_signature));
-        if (offset) {
-                NV_INFO(drm, "BMP BIOS found\n");
-                bios->type = NVBIOS_BMP;
-                bios->offset = offset;
-                return parse_bmp_structure(dev, bios, offset);
-        }
-
-        NV_ERROR(drm, "No known BIOS signature found\n");
-        return -ENODEV;
+        return false;
 }
 
 int
@@ -2146,10 +2128,6 @@ nouveau_bios_init(struct drm_device *dev)
         if (!NVInitVBIOS(dev))
                 return -ENODEV;
 
-        ret = nouveau_parse_vbios_struct(dev);
-        if (ret)
-                return ret;
-
         ret = parse_dcb_table(dev, bios);
         if (ret)
                 return ret;