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1 /*
2  * Copyright 2014 The Chromium OS Authors. All rights reserved.
3  * Use of this source code is governed by a BSD-style license that can be
4  * found in the LICENSE file.
5  */
6 
7 #ifdef DRV_EXYNOS
8 
9 // clang-format off
10 #include <assert.h>
11 #include <errno.h>
12 #include <stdio.h>
13 #include <string.h>
14 #include <xf86drm.h>
15 #include <exynos_drm.h>
16 // clang-format on
17 
18 #include "drv_priv.h"
19 #include "helpers.h"
20 #include "util.h"
21 
22 static const uint32_t render_target_formats[] = { DRM_FORMAT_ARGB8888, DRM_FORMAT_XRGB8888 };
23 
24 static const uint32_t texture_source_formats[] = { DRM_FORMAT_NV12 };
25 
exynos_init(struct driver * drv)26 static int exynos_init(struct driver *drv)
27 {
28 	drv_add_combinations(drv, render_target_formats, ARRAY_SIZE(render_target_formats),
29 			     &LINEAR_METADATA, BO_USE_RENDER_MASK);
30 
31 	drv_add_combinations(drv, texture_source_formats, ARRAY_SIZE(texture_source_formats),
32 			     &LINEAR_METADATA, BO_USE_TEXTURE_MASK);
33 
34 	return drv_modify_linear_combinations(drv);
35 }
36 
exynos_bo_create(struct bo * bo,uint32_t width,uint32_t height,uint32_t format,uint64_t use_flags)37 static int exynos_bo_create(struct bo *bo, uint32_t width, uint32_t height, uint32_t format,
38 			    uint64_t use_flags)
39 {
40 	size_t plane;
41 
42 	if (format == DRM_FORMAT_NV12) {
43 		uint32_t chroma_height;
44 		/* V4L2 s5p-mfc requires width to be 16 byte aligned and height 32. */
45 		width = ALIGN(width, 16);
46 		height = ALIGN(height, 32);
47 		chroma_height = ALIGN(height / 2, 32);
48 		bo->meta.strides[0] = bo->meta.strides[1] = width;
49 		/* MFC v8+ requires 64 byte padding in the end of luma and chroma buffers. */
50 		bo->meta.sizes[0] = bo->meta.strides[0] * height + 64;
51 		bo->meta.sizes[1] = bo->meta.strides[1] * chroma_height + 64;
52 		bo->meta.offsets[0] = bo->meta.offsets[1] = 0;
53 		bo->meta.total_size = bo->meta.sizes[0] + bo->meta.sizes[1];
54 	} else if (format == DRM_FORMAT_XRGB8888 || format == DRM_FORMAT_ARGB8888) {
55 		bo->meta.strides[0] = drv_stride_from_format(format, width, 0);
56 		bo->meta.total_size = bo->meta.sizes[0] = height * bo->meta.strides[0];
57 		bo->meta.offsets[0] = 0;
58 	} else {
59 		drv_log("unsupported format %X\n", format);
60 		assert(0);
61 		return -EINVAL;
62 	}
63 
64 	int ret;
65 	for (plane = 0; plane < bo->meta.num_planes; plane++) {
66 		size_t size = bo->meta.sizes[plane];
67 		struct drm_exynos_gem_create gem_create;
68 
69 		memset(&gem_create, 0, sizeof(gem_create));
70 		gem_create.size = size;
71 		gem_create.flags = EXYNOS_BO_NONCONTIG;
72 
73 		ret = drmIoctl(bo->drv->fd, DRM_IOCTL_EXYNOS_GEM_CREATE, &gem_create);
74 		if (ret) {
75 			drv_log("DRM_IOCTL_EXYNOS_GEM_CREATE failed (size=%zu)\n", size);
76 			ret = -errno;
77 			goto cleanup_planes;
78 		}
79 
80 		bo->handles[plane].u32 = gem_create.handle;
81 	}
82 
83 	return 0;
84 
85 cleanup_planes:
86 	for (; plane != 0; plane--) {
87 		struct drm_gem_close gem_close;
88 		memset(&gem_close, 0, sizeof(gem_close));
89 		gem_close.handle = bo->handles[plane - 1].u32;
90 		int gem_close_ret = drmIoctl(bo->drv->fd, DRM_IOCTL_GEM_CLOSE, &gem_close);
91 		if (gem_close_ret) {
92 			drv_log("DRM_IOCTL_GEM_CLOSE failed: %d\n", gem_close_ret);
93 		}
94 	}
95 
96 	return ret;
97 }
98 
99 /*
100  * Use dumb mapping with exynos even though a GEM buffer is created.
101  * libdrm does the same thing in exynos_drm.c
102  */
103 const struct backend backend_exynos = {
104 	.name = "exynos",
105 	.init = exynos_init,
106 	.bo_create = exynos_bo_create,
107 	.bo_destroy = drv_gem_bo_destroy,
108 	.bo_import = drv_prime_bo_import,
109 	.bo_map = drv_dumb_bo_map,
110 	.bo_unmap = drv_bo_munmap,
111 };
112 
113 #endif
114