Message-Id: <20181213134915.24722-1-kraxel@redhat.com>
Date:   Thu, 13 Dec 2018 14:49:15 +0100
From:   Gerd Hoffmann <kraxel@...hat.com>
To:     dri-devel@...ts.freedesktop.org
Cc:     Gerd Hoffmann <kraxel@...hat.com>, David Airlie <airlied@...ux.ie>,
        virtualization@...ts.linux-foundation.org (open list:VIRTIO GPU DRIVER),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] drm/virtio: switch to generic fbdev emulation

Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
---
 drivers/gpu/drm/virtio/virtgpu_drv.h     |  14 ---
 drivers/gpu/drm/virtio/virtgpu_display.c |   1 -
 drivers/gpu/drm/virtio/virtgpu_drv.c     |   9 +-
 drivers/gpu/drm/virtio/virtgpu_fb.c      | 191 -------------------------------
 drivers/gpu/drm/virtio/virtgpu_kms.c     |   8 --
 5 files changed, 8 insertions(+), 215 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 1deb41d42e..63704915f8 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -137,19 +137,10 @@ struct virtio_gpu_framebuffer {
 #define to_virtio_gpu_framebuffer(x) \
 	container_of(x, struct virtio_gpu_framebuffer, base)
 
-struct virtio_gpu_fbdev {
-	struct drm_fb_helper           helper;
-	struct virtio_gpu_framebuffer  vgfb;
-	struct virtio_gpu_device       *vgdev;
-	struct delayed_work            work;
-};
-
 struct virtio_gpu_mman {
 	struct ttm_bo_device		bdev;
 };
 
-struct virtio_gpu_fbdev;
-
 struct virtio_gpu_queue {
 	struct virtqueue *vq;
 	spinlock_t qlock;
@@ -180,8 +171,6 @@ struct virtio_gpu_device {
 
 	struct virtio_gpu_mman mman;
 
-	/* pointer to fbdev info structure */
-	struct virtio_gpu_fbdev *vgfbdev;
 	struct virtio_gpu_output outputs[VIRTIO_GPU_MAX_SCANOUTS];
 	uint32_t num_scanouts;
 
@@ -249,9 +238,6 @@ int virtio_gpu_mode_dumb_mmap(struct drm_file *file_priv,
 			      uint32_t handle, uint64_t *offset_p);
 
 /* virtio_fb */
-#define VIRTIO_GPUFB_CONN_LIMIT 1
-int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev);
-void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev);
 int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *qfb,
 			     struct drm_clip_rect *clips,
 			     unsigned int num_clips);
diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index b5580b11a0..e1c223e18d 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -390,6 +390,5 @@ void virtio_gpu_modeset_fini(struct virtio_gpu_device *vgdev)
 
 	for (i = 0 ; i < vgdev->num_scanouts; ++i)
 		kfree(vgdev->outputs[i].edid);
-	virtio_gpu_fbdev_fini(vgdev);
 	drm_mode_config_cleanup(vgdev->ddev);
 }
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.c b/drivers/gpu/drm/virtio/virtgpu_drv.c
index f7f32a885a..7df50920c1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.c
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.c
@@ -42,13 +42,20 @@ module_param_named(modeset, virtio_gpu_modeset, int, 0400);
 
 static int virtio_gpu_probe(struct virtio_device *vdev)
 {
+	int ret;
+
 	if (vgacon_text_force() && virtio_gpu_modeset == -1)
 		return -EINVAL;
 
 	if (virtio_gpu_modeset == 0)
 		return -EINVAL;
 
-	return drm_virtio_init(&driver, vdev);
+	ret = drm_virtio_init(&driver, vdev);
+	if (ret)
+		return ret;
+
+	drm_fbdev_generic_setup(vdev->priv, 32);
+	return 0;
 }
 
 static void virtio_gpu_remove(struct virtio_device *vdev)
diff --git a/drivers/gpu/drm/virtio/virtgpu_fb.c b/drivers/gpu/drm/virtio/virtgpu_fb.c
index fb1cc8b2f1..b07584b1c2 100644
--- a/drivers/gpu/drm/virtio/virtgpu_fb.c
+++ b/drivers/gpu/drm/virtio/virtgpu_fb.c
@@ -27,8 +27,6 @@
 #include <drm/drm_fb_helper.h>
 #include "virtgpu_drv.h"
 
-#define VIRTIO_GPU_FBCON_POLL_PERIOD (HZ / 60)
-
 static int virtio_gpu_dirty_update(struct virtio_gpu_framebuffer *fb,
 				   bool store, int x, int y,
 				   int width, int height)
@@ -150,192 +148,3 @@ int virtio_gpu_surface_dirty(struct virtio_gpu_framebuffer *vgfb,
 				      left, top, right - left, bottom - top);
 	return 0;
 }
-
-static void virtio_gpu_fb_dirty_work(struct work_struct *work)
-{
-	struct delayed_work *delayed_work = to_delayed_work(work);
-	struct virtio_gpu_fbdev *vfbdev =
-		container_of(delayed_work, struct virtio_gpu_fbdev, work);
-	struct virtio_gpu_framebuffer *vgfb = &vfbdev->vgfb;
-
-	virtio_gpu_dirty_update(&vfbdev->vgfb, false, vgfb->x1, vgfb->y1,
-				vgfb->x2 - vgfb->x1, vgfb->y2 - vgfb->y1);
-}
-
-static void virtio_gpu_3d_fillrect(struct fb_info *info,
-				   const struct fb_fillrect *rect)
-{
-	struct virtio_gpu_fbdev *vfbdev = info->par;
-
-	drm_fb_helper_sys_fillrect(info, rect);
-	virtio_gpu_dirty_update(&vfbdev->vgfb, true, rect->dx, rect->dy,
-			     rect->width, rect->height);
-	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
-}
-
-static void virtio_gpu_3d_copyarea(struct fb_info *info,
-				   const struct fb_copyarea *area)
-{
-	struct virtio_gpu_fbdev *vfbdev = info->par;
-
-	drm_fb_helper_sys_copyarea(info, area);
-	virtio_gpu_dirty_update(&vfbdev->vgfb, true, area->dx, area->dy,
-			   area->width, area->height);
-	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
-}
-
-static void virtio_gpu_3d_imageblit(struct fb_info *info,
-				    const struct fb_image *image)
-{
-	struct virtio_gpu_fbdev *vfbdev = info->par;
-
-	drm_fb_helper_sys_imageblit(info, image);
-	virtio_gpu_dirty_update(&vfbdev->vgfb, true, image->dx, image->dy,
-			     image->width, image->height);
-	schedule_delayed_work(&vfbdev->work, VIRTIO_GPU_FBCON_POLL_PERIOD);
-}
-
-static struct fb_ops virtio_gpufb_ops = {
-	.owner = THIS_MODULE,
-	DRM_FB_HELPER_DEFAULT_OPS,
-	.fb_fillrect = virtio_gpu_3d_fillrect,
-	.fb_copyarea = virtio_gpu_3d_copyarea,
-	.fb_imageblit = virtio_gpu_3d_imageblit,
-};
-
-static int virtio_gpufb_create(struct drm_fb_helper *helper,
-			       struct drm_fb_helper_surface_size *sizes)
-{
-	struct virtio_gpu_fbdev *vfbdev =
-		container_of(helper, struct virtio_gpu_fbdev, helper);
-	struct drm_device *dev = helper->dev;
-	struct virtio_gpu_device *vgdev = dev->dev_private;
-	struct fb_info *info;
-	struct drm_framebuffer *fb;
-	struct drm_mode_fb_cmd2 mode_cmd = {};
-	struct virtio_gpu_object *obj;
-	uint32_t format, size;
-	int ret;
-
-	mode_cmd.width = sizes->surface_width;
-	mode_cmd.height = sizes->surface_height;
-	mode_cmd.pitches[0] = mode_cmd.width * 4;
-	mode_cmd.pixel_format = DRM_FORMAT_HOST_XRGB8888;
-
-	format = virtio_gpu_translate_format(mode_cmd.pixel_format);
-	if (format == 0)
-		return -EINVAL;
-
-	size = mode_cmd.pitches[0] * mode_cmd.height;
-	obj = virtio_gpu_alloc_object(dev, size, false, true);
-	if (IS_ERR(obj))
-		return PTR_ERR(obj);
-
-	virtio_gpu_cmd_create_resource(vgdev, obj, format,
-				       mode_cmd.width, mode_cmd.height);
-
-	ret = virtio_gpu_object_kmap(obj);
-	if (ret) {
-		DRM_ERROR("failed to kmap fb %d\n", ret);
-		goto err_obj_vmap;
-	}
-
-	/* attach the object to the resource */
-	ret = virtio_gpu_object_attach(vgdev, obj, NULL);
-	if (ret)
-		goto err_obj_attach;
-
-	info = drm_fb_helper_alloc_fbi(helper);
-	if (IS_ERR(info)) {
-		ret = PTR_ERR(info);
-		goto err_fb_alloc;
-	}
-
-	info->par = helper;
-
-	ret = virtio_gpu_framebuffer_init(dev, &vfbdev->vgfb,
-					  &mode_cmd, &obj->gem_base);
-	if (ret)
-		goto err_fb_alloc;
-
-	fb = &vfbdev->vgfb.base;
-
-	vfbdev->helper.fb = fb;
-
-	strcpy(info->fix.id, "virtiodrmfb");
-	info->fbops = &virtio_gpufb_ops;
-	info->pixmap.flags = FB_PIXMAP_SYSTEM;
-
-	info->screen_buffer = obj->vmap;
-	info->screen_size = obj->gem_base.size;
-	drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
-	drm_fb_helper_fill_var(info, &vfbdev->helper,
-			       sizes->fb_width, sizes->fb_height);
-
-	info->fix.mmio_start = 0;
-	info->fix.mmio_len = 0;
-	return 0;
-
-err_fb_alloc:
-	virtio_gpu_object_detach(vgdev, obj);
-err_obj_attach:
-err_obj_vmap:
-	virtio_gpu_gem_free_object(&obj->gem_base);
-	return ret;
-}
-
-static int virtio_gpu_fbdev_destroy(struct drm_device *dev,
-				    struct virtio_gpu_fbdev *vgfbdev)
-{
-	struct virtio_gpu_framebuffer *vgfb = &vgfbdev->vgfb;
-
-	drm_fb_helper_unregister_fbi(&vgfbdev->helper);
-
-	if (vgfb->base.obj[0])
-		vgfb->base.obj[0] = NULL;
-	drm_fb_helper_fini(&vgfbdev->helper);
-	drm_framebuffer_cleanup(&vgfb->base);
-
-	return 0;
-}
-static const struct drm_fb_helper_funcs virtio_gpu_fb_helper_funcs = {
-	.fb_probe = virtio_gpufb_create,
-};
-
-int virtio_gpu_fbdev_init(struct virtio_gpu_device *vgdev)
-{
-	struct virtio_gpu_fbdev *vgfbdev;
-	int bpp_sel = 32; /* TODO: parameter from somewhere? */
-	int ret;
-
-	vgfbdev = kzalloc(sizeof(struct virtio_gpu_fbdev), GFP_KERNEL);
-	if (!vgfbdev)
-		return -ENOMEM;
-
-	vgfbdev->vgdev = vgdev;
-	vgdev->vgfbdev = vgfbdev;
-	INIT_DELAYED_WORK(&vgfbdev->work, virtio_gpu_fb_dirty_work);
-
-	drm_fb_helper_prepare(vgdev->ddev, &vgfbdev->helper,
-			      &virtio_gpu_fb_helper_funcs);
-	ret = drm_fb_helper_init(vgdev->ddev, &vgfbdev->helper,
-				 VIRTIO_GPUFB_CONN_LIMIT);
-	if (ret) {
-		kfree(vgfbdev);
-		return ret;
-	}
-
-	drm_fb_helper_single_add_all_connectors(&vgfbdev->helper);
-	drm_fb_helper_initial_config(&vgfbdev->helper, bpp_sel);
-	return 0;
-}
-
-void virtio_gpu_fbdev_fini(struct virtio_gpu_device *vgdev)
-{
-	if (!vgdev->vgfbdev)
-		return;
-
-	virtio_gpu_fbdev_destroy(vgdev->ddev, vgdev->vgfbdev);
-	kfree(vgdev->vgfbdev);
-	vgdev->vgfbdev = NULL;
-}
diff --git a/drivers/gpu/drm/virtio/virtgpu_kms.c b/drivers/gpu/drm/virtio/virtgpu_kms.c
index 3af6181c05..1072064a0d 100644
--- a/drivers/gpu/drm/virtio/virtgpu_kms.c
+++ b/drivers/gpu/drm/virtio/virtgpu_kms.c
@@ -28,11 +28,6 @@
 #include <drm/drmP.h>
 #include "virtgpu_drv.h"
 
-static int virtio_gpu_fbdev = 1;
-
-MODULE_PARM_DESC(fbdev, "Disable/Enable framebuffer device & console");
-module_param_named(fbdev, virtio_gpu_fbdev, int, 0400);
-
 static void virtio_gpu_config_changed_work_func(struct work_struct *work)
 {
 	struct virtio_gpu_device *vgdev =
@@ -212,9 +207,6 @@ int virtio_gpu_driver_load(struct drm_device *dev, unsigned long flags)
 	virtio_gpu_cmd_get_display_info(vgdev);
 	wait_event_timeout(vgdev->resp_wq, !vgdev->display_info_pending,
 			   5 * HZ);
-	if (virtio_gpu_fbdev)
-		virtio_gpu_fbdev_init(vgdev);
-
 	return 0;
 
 err_modeset:
-- 
2.9.3

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