1 files changed, 0 insertions, 350 deletions

diff --git a/drivers/gpu/drm/drm_fbdev_generic.c b/drivers/gpu/drm/drm_fbdev_generic.c
deleted file mode 100644
index d647d89764cb..000000000000
--- a/drivers/gpu/drm/drm_fbdev_generic.c
+++ /dev/null
@@ -1,350 +0,0 @@
-// SPDX-License-Identifier: MIT
-
-#include <linux/moduleparam.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm_crtc_helper.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_framebuffer.h>
-#include <drm/drm_gem.h>
-#include <drm/drm_print.h>
-
-#include <drm/drm_fbdev_generic.h>
-
-/* @user: 1=userspace, 0=fbcon */
-static int drm_fbdev_generic_fb_open(struct fb_info *info, int user)
-{
-	struct drm_fb_helper *fb_helper = info->par;
-
-	/* No need to take a ref for fbcon because it unbinds on unregister */
-	if (user && !try_module_get(fb_helper->dev->driver->fops->owner))
-		return -ENODEV;
-
-	return 0;
-}
-
-static int drm_fbdev_generic_fb_release(struct fb_info *info, int user)
-{
-	struct drm_fb_helper *fb_helper = info->par;
-
-	if (user)
-		module_put(fb_helper->dev->driver->fops->owner);
-
-	return 0;
-}
-
-FB_GEN_DEFAULT_DEFERRED_SYSMEM_OPS(drm_fbdev_generic,
-				   drm_fb_helper_damage_range,
-				   drm_fb_helper_damage_area);
-
-static void drm_fbdev_generic_fb_destroy(struct fb_info *info)
-{
-	struct drm_fb_helper *fb_helper = info->par;
-	void *shadow = info->screen_buffer;
-
-	if (!fb_helper->dev)
-		return;
-
-	fb_deferred_io_cleanup(info);
-	drm_fb_helper_fini(fb_helper);
-	vfree(shadow);
-	drm_client_framebuffer_delete(fb_helper->buffer);
-
-	drm_client_release(&fb_helper->client);
-	drm_fb_helper_unprepare(fb_helper);
-	kfree(fb_helper);
-}
-
-static const struct fb_ops drm_fbdev_generic_fb_ops = {
-	.owner		= THIS_MODULE,
-	.fb_open	= drm_fbdev_generic_fb_open,
-	.fb_release	= drm_fbdev_generic_fb_release,
-	FB_DEFAULT_DEFERRED_OPS(drm_fbdev_generic),
-	DRM_FB_HELPER_DEFAULT_OPS,
-	.fb_destroy	= drm_fbdev_generic_fb_destroy,
-};
-
-/*
- * This function uses the client API to create a framebuffer backed by a dumb buffer.
- */
-static int drm_fbdev_generic_helper_fb_probe(struct drm_fb_helper *fb_helper,
-					     struct drm_fb_helper_surface_size *sizes)
-{
-	struct drm_client_dev *client = &fb_helper->client;
-	struct drm_device *dev = fb_helper->dev;
-	struct drm_client_buffer *buffer;
-	struct fb_info *info;
-	size_t screen_size;
-	void *screen_buffer;
-	u32 format;
-	int ret;
-
-	drm_dbg_kms(dev, "surface width(%d), height(%d) and bpp(%d)\n",
-		    sizes->surface_width, sizes->surface_height,
-		    sizes->surface_bpp);
-
-	format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth);
-	buffer = drm_client_framebuffer_create(client, sizes->surface_width,
-					       sizes->surface_height, format);
-	if (IS_ERR(buffer))
-		return PTR_ERR(buffer);
-
-	fb_helper->buffer = buffer;
-	fb_helper->fb = buffer->fb;
-
-	screen_size = buffer->gem->size;
-	screen_buffer = vzalloc(screen_size);
-	if (!screen_buffer) {
-		ret = -ENOMEM;
-		goto err_drm_client_framebuffer_delete;
-	}
-
-	info = drm_fb_helper_alloc_info(fb_helper);
-	if (IS_ERR(info)) {
-		ret = PTR_ERR(info);
-		goto err_vfree;
-	}
-
-	drm_fb_helper_fill_info(info, fb_helper, sizes);
-
-	info->fbops = &drm_fbdev_generic_fb_ops;
-
-	/* screen */
-	info->flags |= FBINFO_VIRTFB | FBINFO_READS_FAST;
-	info->screen_buffer = screen_buffer;
-	info->fix.smem_start = page_to_phys(vmalloc_to_page(info->screen_buffer));
-	info->fix.smem_len = screen_size;
-
-	/* deferred I/O */
-	fb_helper->fbdefio.delay = HZ / 20;
-	fb_helper->fbdefio.deferred_io = drm_fb_helper_deferred_io;
-
-	info->fbdefio = &fb_helper->fbdefio;
-	ret = fb_deferred_io_init(info);
-	if (ret)
-		goto err_drm_fb_helper_release_info;
-
-	return 0;
-
-err_drm_fb_helper_release_info:
-	drm_fb_helper_release_info(fb_helper);
-err_vfree:
-	vfree(screen_buffer);
-err_drm_client_framebuffer_delete:
-	fb_helper->fb = NULL;
-	fb_helper->buffer = NULL;
-	drm_client_framebuffer_delete(buffer);
-	return ret;
-}
-
-static void drm_fbdev_generic_damage_blit_real(struct drm_fb_helper *fb_helper,
-					       struct drm_clip_rect *clip,
-					       struct iosys_map *dst)
-{
-	struct drm_framebuffer *fb = fb_helper->fb;
-	size_t offset = clip->y1 * fb->pitches[0];
-	size_t len = clip->x2 - clip->x1;
-	unsigned int y;
-	void *src;
-
-	switch (drm_format_info_bpp(fb->format, 0)) {
-	case 1:
-		offset += clip->x1 / 8;
-		len = DIV_ROUND_UP(len + clip->x1 % 8, 8);
-		break;
-	case 2:
-		offset += clip->x1 / 4;
-		len = DIV_ROUND_UP(len + clip->x1 % 4, 4);
-		break;
-	case 4:
-		offset += clip->x1 / 2;
-		len = DIV_ROUND_UP(len + clip->x1 % 2, 2);
-		break;
-	default:
-		offset += clip->x1 * fb->format->cpp[0];
-		len *= fb->format->cpp[0];
-		break;
-	}
-
-	src = fb_helper->info->screen_buffer + offset;
-	iosys_map_incr(dst, offset); /* go to first pixel within clip rect */
-
-	for (y = clip->y1; y < clip->y2; y++) {
-		iosys_map_memcpy_to(dst, 0, src, len);
-		iosys_map_incr(dst, fb->pitches[0]);
-		src += fb->pitches[0];
-	}
-}
-
-static int drm_fbdev_generic_damage_blit(struct drm_fb_helper *fb_helper,
-					 struct drm_clip_rect *clip)
-{
-	struct drm_client_buffer *buffer = fb_helper->buffer;
-	struct iosys_map map, dst;
-	int ret;
-
-	/*
-	 * We have to pin the client buffer to its current location while
-	 * flushing the shadow buffer. In the general case, concurrent
-	 * modesetting operations could try to move the buffer and would
-	 * fail. The modeset has to be serialized by acquiring the reservation
-	 * object of the underlying BO here.
-	 *
-	 * For fbdev emulation, we only have to protect against fbdev modeset
-	 * operations. Nothing else will involve the client buffer's BO. So it
-	 * is sufficient to acquire struct drm_fb_helper.lock here.
-	 */
-	mutex_lock(&fb_helper->lock);
-
-	ret = drm_client_buffer_vmap(buffer, &map);
-	if (ret)
-		goto out;
-
-	dst = map;
-	drm_fbdev_generic_damage_blit_real(fb_helper, clip, &dst);
-
-	drm_client_buffer_vunmap(buffer);
-
-out:
-	mutex_unlock(&fb_helper->lock);
-
-	return ret;
-}
-
-static int drm_fbdev_generic_helper_fb_dirty(struct drm_fb_helper *helper,
-					     struct drm_clip_rect *clip)
-{
-	struct drm_device *dev = helper->dev;
-	int ret;
-
-	/* Call damage handlers only if necessary */
-	if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
-		return 0;
-
-	ret = drm_fbdev_generic_damage_blit(helper, clip);
-	if (drm_WARN_ONCE(dev, ret, "Damage blitter failed: ret=%d\n", ret))
-		return ret;
-
-	if (helper->fb->funcs->dirty) {
-		ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
-		if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))
-			return ret;
-	}
-
-	return 0;
-}
-
-static const struct drm_fb_helper_funcs drm_fbdev_generic_helper_funcs = {
-	.fb_probe = drm_fbdev_generic_helper_fb_probe,
-	.fb_dirty = drm_fbdev_generic_helper_fb_dirty,
-};
-
-static void drm_fbdev_generic_client_unregister(struct drm_client_dev *client)
-{
-	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
-
-	if (fb_helper->info) {
-		drm_fb_helper_unregister_info(fb_helper);
-	} else {
-		drm_client_release(&fb_helper->client);
-		drm_fb_helper_unprepare(fb_helper);
-		kfree(fb_helper);
-	}
-}
-
-static int drm_fbdev_generic_client_restore(struct drm_client_dev *client)
-{
-	drm_fb_helper_lastclose(client->dev);
-
-	return 0;
-}
-
-static int drm_fbdev_generic_client_hotplug(struct drm_client_dev *client)
-{
-	struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
-	struct drm_device *dev = client->dev;
-	int ret;
-
-	if (dev->fb_helper)
-		return drm_fb_helper_hotplug_event(dev->fb_helper);
-
-	ret = drm_fb_helper_init(dev, fb_helper);
-	if (ret)
-		goto err_drm_err;
-
-	if (!drm_drv_uses_atomic_modeset(dev))
-		drm_helper_disable_unused_functions(dev);
-
-	ret = drm_fb_helper_initial_config(fb_helper);
-	if (ret)
-		goto err_drm_fb_helper_fini;
-
-	return 0;
-
-err_drm_fb_helper_fini:
-	drm_fb_helper_fini(fb_helper);
-err_drm_err:
-	drm_err(dev, "fbdev: Failed to setup generic emulation (ret=%d)\n", ret);
-	return ret;
-}
-
-static const struct drm_client_funcs drm_fbdev_generic_client_funcs = {
-	.owner		= THIS_MODULE,
-	.unregister	= drm_fbdev_generic_client_unregister,
-	.restore	= drm_fbdev_generic_client_restore,
-	.hotplug	= drm_fbdev_generic_client_hotplug,
-};
-
-/**
- * drm_fbdev_generic_setup() - Setup generic fbdev emulation
- * @dev: DRM device
- * @preferred_bpp: Preferred bits per pixel for the device.
- *
- * This function sets up generic fbdev emulation for drivers that supports
- * dumb buffers with a virtual address and that can be mmap'ed.
- * drm_fbdev_generic_setup() shall be called after the DRM driver registered
- * the new DRM device with drm_dev_register().
- *
- * Restore, hotplug events and teardown are all taken care of. Drivers that do
- * suspend/resume need to call drm_fb_helper_set_suspend_unlocked() themselves.
- * Simple drivers might use drm_mode_config_helper_suspend().
- *
- * In order to provide fixed mmap-able memory ranges, generic fbdev emulation
- * uses a shadow buffer in system memory. The implementation blits the shadow
- * fbdev buffer onto the real buffer in regular intervals.
- *
- * This function is safe to call even when there are no connectors present.
- * Setup will be retried on the next hotplug event.
- *
- * The fbdev is destroyed by drm_dev_unregister().
- */
-void drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp)
-{
-	struct drm_fb_helper *fb_helper;
-	int ret;
-
-	drm_WARN(dev, !dev->registered, "Device has not been registered.\n");
-	drm_WARN(dev, dev->fb_helper, "fb_helper is already set!\n");
-
-	fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
-	if (!fb_helper)
-		return;
-	drm_fb_helper_prepare(dev, fb_helper, preferred_bpp, &drm_fbdev_generic_helper_funcs);
-
-	ret = drm_client_init(dev, &fb_helper->client, "fbdev", &drm_fbdev_generic_client_funcs);
-	if (ret) {
-		drm_err(dev, "Failed to register client: %d\n", ret);
-		goto err_drm_client_init;
-	}
-
-	drm_client_register(&fb_helper->client);
-
-	return;
-
-err_drm_client_init:
-	drm_fb_helper_unprepare(fb_helper);
-	kfree(fb_helper);
-	return;
-}
-EXPORT_SYMBOL(drm_fbdev_generic_setup);