vgacon: dummy implementation for vgacon_text_force

This allows us to ditch a ton of ugly #ifdefs from a bunch of drm modeset
drivers.

v2: Make the dummy function actually return a sane value, spotted by
Ville.

v3: Because the patch is still in limbo there's no more drivers to
convert, noticed by Emil.

v4: Rebase once more, because hooray. I'll just go ahead an apply this
one later on to drm-misc.

Cc: Emil Velikov <[e-mail]>
Cc: Ville Syrjälä <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: Greg Kroah-Hartman <[e-mail]>
Reviewed-by: Emil Velikov <[e-mail]>
Reviewed-by: Alex Deucher <[e-mail]>
Signed-off-by: Daniel Vetter <[e-mail]>

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

···
 
 static int __init amdgpu_init(void)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force()) {
 		DRM_ERROR("VGACON disables amdgpu kernel modesetting.\n");
 		return -EINVAL;
 	}
-#endif
 	DRM_INFO("amdgpu kernel modesetting enabled.\n");
 	driver = &kms_driver;
 	pdriver = &amdgpu_kms_pci_driver;

drivers/gpu/drm/ast/ast_drv.c

···
 
 static int __init ast_init(void)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && ast_modeset == -1)
 		return -EINVAL;
-#endif
 
 	if (ast_modeset == 0)
 		return -EINVAL;

drivers/gpu/drm/cirrus/cirrus_drv.c

···
 
 static int __init cirrus_init(void)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && cirrus_modeset == -1)
 		return -EINVAL;
-#endif
 
 	if (cirrus_modeset == 0)
 		return -EINVAL;

drivers/gpu/drm/i915/i915_drv.c

···
 	if (i915.modeset == 0)
 		driver.driver_features &= ~DRIVER_MODESET;
 
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && i915.modeset == -1)
 		driver.driver_features &= ~DRIVER_MODESET;
-#endif
 
 	if (!(driver.driver_features & DRIVER_MODESET)) {
 		/* Silently fail loading to not upset userspace. */

drivers/gpu/drm/mgag200/mgag200_drv.c

···
 
 static int __init mgag200_init(void)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && mgag200_modeset == -1)
 		return -EINVAL;
-#endif
 
 	if (mgag200_modeset == 0)
 		return -EINVAL;

drivers/gpu/drm/nouveau/nouveau_drm.c

···
 	nouveau_display_options();
 
 	if (nouveau_modeset == -1) {
-#ifdef CONFIG_VGA_CONSOLE
 		if (vgacon_text_force())
 			nouveau_modeset = 0;
-#endif
 	}
 
 	if (!nouveau_modeset)

drivers/gpu/drm/qxl/qxl_drv.c

···
 
 static int __init qxl_init(void)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && qxl_modeset == -1)
 		return -EINVAL;
-#endif
 
 	if (qxl_modeset == 0)
 		return -EINVAL;

drivers/gpu/drm/radeon/radeon_drv.c

···
 
 static int __init radeon_init(void)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && radeon_modeset == -1) {
 		DRM_INFO("VGACON disable radeon kernel modesetting.\n");
 		radeon_modeset = 0;
 	}
-#endif
 	/* set to modesetting by default if not nomodeset */
 	if (radeon_modeset == -1)
 		radeon_modeset = 1;

drivers/gpu/drm/virtio/virtgpu_drv.c

···
 
 static int virtio_gpu_probe(struct virtio_device *vdev)
 {
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force() && virtio_gpu_modeset == -1)
 		return -EINVAL;
-#endif
 
 	if (virtio_gpu_modeset == 0)
 		return -EINVAL;

drivers/gpu/drm/vmwgfx/vmwgfx_drv.c

···
 {
 	int ret;
 
-#ifdef CONFIG_VGA_CONSOLE
 	if (vgacon_text_force())
 		return -EINVAL;
-#endif
 
 	ret = drm_pci_init(&driver, &vmw_pci_driver);
 	if (ret)

include/linux/console.h

···
 
 #ifdef CONFIG_VGA_CONSOLE
 extern bool vgacon_text_force(void);
+#else
+static inline bool vgacon_text_force(void) { return false; }
 #endif
 
 #endif /* _LINUX_CONSOLE_H */