1/*
  2 * Copyright (C) 2015 Red Hat, Inc.
  3 * All Rights Reserved.
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining
  6 * a copy of this software and associated documentation files (the
  7 * "Software"), to deal in the Software without restriction, including
  8 * without limitation the rights to use, copy, modify, merge, publish,
  9 * distribute, sublicense, and/or sell copies of the Software, and to
 10 * permit persons to whom the Software is furnished to do so, subject to
 11 * the following conditions:
 12 *
 13 * The above copyright notice and this permission notice (including the
 14 * next paragraph) shall be included in all copies or substantial
 15 * portions of the Software.
 16 *
 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 24 */
 25
 26#include "virtgpu_drv.h"
 27#include <drm/drm_plane_helper.h>
 28#include <drm/drm_atomic_helper.h>
 29
 30static const uint32_t virtio_gpu_formats[] = {
 31	DRM_FORMAT_XRGB8888,
 32	DRM_FORMAT_ARGB8888,
 33	DRM_FORMAT_BGRX8888,
 34	DRM_FORMAT_BGRA8888,
 35	DRM_FORMAT_RGBX8888,
 36	DRM_FORMAT_RGBA8888,
 37	DRM_FORMAT_XBGR8888,
 38	DRM_FORMAT_ABGR8888,
 39};
 40
 41static void virtio_gpu_plane_destroy(struct drm_plane *plane)
 42{
 43	kfree(plane);
 44}
 45
 46static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
 47	.update_plane		= drm_atomic_helper_update_plane,
 48	.disable_plane		= drm_atomic_helper_disable_plane,
 49	.destroy		= virtio_gpu_plane_destroy,
 50	.reset			= drm_atomic_helper_plane_reset,
 51	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
 52	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
 53};
 54
 55static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
 56					 struct drm_plane_state *state)
 57{
 58	return 0;
 59}
 60
 61static void virtio_gpu_plane_atomic_update(struct drm_plane *plane,
 62					   struct drm_plane_state *old_state)
 63{
 64	struct drm_device *dev = plane->dev;
 65	struct virtio_gpu_device *vgdev = dev->dev_private;
 66	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc);
 67	struct virtio_gpu_framebuffer *vgfb;
 68	struct virtio_gpu_object *bo;
 69	uint32_t handle;
 70
 71	if (plane->state->fb) {
 72		vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 73		bo = gem_to_virtio_gpu_obj(vgfb->obj);
 74		handle = bo->hw_res_handle;
 75		if (bo->dumb) {
 76			virtio_gpu_cmd_transfer_to_host_2d
 77				(vgdev, handle, 0,
 78				 cpu_to_le32(plane->state->crtc_w),
 79				 cpu_to_le32(plane->state->crtc_h),
 80				 plane->state->crtc_x, plane->state->crtc_y, NULL);
 81		}
 82	} else {
 83		handle = 0;
 84	}
 85
 86	DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle,
 87		  plane->state->crtc_w, plane->state->crtc_h,
 88		  plane->state->crtc_x, plane->state->crtc_y);
 89	virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
 90				   plane->state->crtc_w,
 91				   plane->state->crtc_h,
 92				   plane->state->crtc_x,
 93				   plane->state->crtc_y);
 94	virtio_gpu_cmd_resource_flush(vgdev, handle,
 95				      plane->state->crtc_x,
 96				      plane->state->crtc_y,
 97				      plane->state->crtc_w,
 98				      plane->state->crtc_h);
 99}
100
101
102static const struct drm_plane_helper_funcs virtio_gpu_plane_helper_funcs = {
103	.atomic_check		= virtio_gpu_plane_atomic_check,
104	.atomic_update		= virtio_gpu_plane_atomic_update,
105};
106
107struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
108					int index)
109{
110	struct drm_device *dev = vgdev->ddev;
111	struct drm_plane *plane;
112	int ret;
113
114	plane = kzalloc(sizeof(*plane), GFP_KERNEL);
115	if (!plane)
116		return ERR_PTR(-ENOMEM);
117
118	ret = drm_universal_plane_init(dev, plane, 1 << index,
119				       &virtio_gpu_plane_funcs,
120				       virtio_gpu_formats,
121				       ARRAY_SIZE(virtio_gpu_formats),
122				       DRM_PLANE_TYPE_PRIMARY, NULL);
123	if (ret)
124		goto err_plane_init;
125
126	drm_plane_helper_add(plane, &virtio_gpu_plane_helper_funcs);
127	return plane;
128
129err_plane_init:
130	kfree(plane);
131	return ERR_PTR(ret);
132}