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virtgpu_plane.c revision 1.2 
      1 /*	$NetBSD: virtgpu_plane.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2015 Red Hat, Inc.
      5  * All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining
      8  * a copy of this software and associated documentation files (the
      9  * "Software"), to deal in the Software without restriction, including
     10  * without limitation the rights to use, copy, modify, merge, publish,
     11  * distribute, sublicense, and/or sell copies of the Software, and to
     12  * permit persons to whom the Software is furnished to do so, subject to
     13  * the following conditions:
     14  *
     15  * The above copyright notice and this permission notice (including the
     16  * next paragraph) shall be included in all copies or substantial
     17  * portions of the Software.
     18  *
     19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     22  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     23  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     24  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     25  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: virtgpu_plane.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $");
     30 
     31 #include "virtgpu_drv.h"
     32 #include <drm/drm_plane_helper.h>
     33 #include <drm/drm_atomic_helper.h>
     34 
     35 static const uint32_t virtio_gpu_formats[] = {
     36 	DRM_FORMAT_XRGB8888,
     37 	DRM_FORMAT_ARGB8888,
     38 	DRM_FORMAT_BGRX8888,
     39 	DRM_FORMAT_BGRA8888,
     40 	DRM_FORMAT_RGBX8888,
     41 	DRM_FORMAT_RGBA8888,
     42 	DRM_FORMAT_XBGR8888,
     43 	DRM_FORMAT_ABGR8888,
     44 };
     45 
     46 static void virtio_gpu_plane_destroy(struct drm_plane *plane)
     47 {
     48 	kfree(plane);
     49 }
     50 
     51 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
     52 	.update_plane		= drm_atomic_helper_update_plane,
     53 	.disable_plane		= drm_atomic_helper_disable_plane,
     54 	.destroy		= virtio_gpu_plane_destroy,
     55 	.reset			= drm_atomic_helper_plane_reset,
     56 	.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
     57 	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
     58 };
     59 
     60 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
     61 					 struct drm_plane_state *state)
     62 {
     63 	return 0;
     64 }
     65 
     66 static void virtio_gpu_plane_atomic_update(struct drm_plane *plane,
     67 					   struct drm_plane_state *old_state)
     68 {
     69 	struct drm_device *dev = plane->dev;
     70 	struct virtio_gpu_device *vgdev = dev->dev_private;
     71 	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc);
     72 	struct virtio_gpu_framebuffer *vgfb;
     73 	struct virtio_gpu_object *bo;
     74 	uint32_t handle;
     75 
     76 	if (plane->fb) {
     77 		vgfb = to_virtio_gpu_framebuffer(plane->fb);
     78 		bo = gem_to_virtio_gpu_obj(vgfb->obj);
     79 		handle = bo->hw_res_handle;
     80 	} else {
     81 		handle = 0;
     82 	}
     83 
     84 	DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle,
     85 		  plane->state->crtc_w, plane->state->crtc_h,
     86 		  plane->state->crtc_x, plane->state->crtc_y);
     87 	virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
     88 				   plane->state->crtc_w,
     89 				   plane->state->crtc_h,
     90 				   plane->state->crtc_x,
     91 				   plane->state->crtc_y);
     92 }
     93 
     94 
     95 static const struct drm_plane_helper_funcs virtio_gpu_plane_helper_funcs = {
     96 	.atomic_check		= virtio_gpu_plane_atomic_check,
     97 	.atomic_update		= virtio_gpu_plane_atomic_update,
     98 };
     99 
    100 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
    101 					int index)
    102 {
    103 	struct drm_device *dev = vgdev->ddev;
    104 	struct drm_plane *plane;
    105 	int ret;
    106 
    107 	plane = kzalloc(sizeof(*plane), GFP_KERNEL);
    108 	if (!plane)
    109 		return ERR_PTR(-ENOMEM);
    110 
    111 	ret = drm_universal_plane_init(dev, plane, 1 << index,
    112 				       &virtio_gpu_plane_funcs,
    113 				       virtio_gpu_formats,
    114 				       ARRAY_SIZE(virtio_gpu_formats),
    115 				       DRM_PLANE_TYPE_PRIMARY);
    116 	if (ret)
    117 		goto err_plane_init;
    118 
    119 	drm_plane_helper_add(plane, &virtio_gpu_plane_helper_funcs);
    120 	return plane;
    121 
    122 err_plane_init:
    123 	kfree(plane);
    124 	return ERR_PTR(ret);
    125 }
    126