1// SPDX-License-Identifier: GPL-2.0
2/*
3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
4 * Author: James.Qian.Wang <james.qian.wang@arm.com>
5 *
6 */
7#include <drm/drm_device.h>
8#include <drm/drm_fb_dma_helper.h>
9#include <drm/drm_gem.h>
10#include <drm/drm_gem_dma_helper.h>
11#include <drm/drm_gem_framebuffer_helper.h>
12
13#include "komeda_framebuffer.h"
14#include "komeda_dev.h"
15
16static void komeda_fb_destroy(struct drm_framebuffer *fb)
17{
18 struct komeda_fb *kfb = to_kfb(fb);
19 u32 i;
20
21 for (i = 0; i < fb->format->num_planes; i++)
22 drm_gem_object_put(obj: fb->obj[i]);
23
24 drm_framebuffer_cleanup(fb);
25 kfree(objp: kfb);
26}
27
28static int komeda_fb_create_handle(struct drm_framebuffer *fb,
29 struct drm_file *file, u32 *handle)
30{
31 return drm_gem_handle_create(file_priv: file, obj: fb->obj[0], handlep: handle);
32}
33
34static const struct drm_framebuffer_funcs komeda_fb_funcs = {
35 .destroy = komeda_fb_destroy,
36 .create_handle = komeda_fb_create_handle,
37};
38
39static int
40komeda_fb_afbc_size_check(struct komeda_fb *kfb, struct drm_file *file,
41 const struct drm_mode_fb_cmd2 *mode_cmd)
42{
43 struct drm_framebuffer *fb = &kfb->base;
44 const struct drm_format_info *info = fb->format;
45 struct drm_gem_object *obj;
46 u32 alignment_w = 0, alignment_h = 0, alignment_header, n_blocks, bpp;
47 u64 min_size;
48
49 obj = drm_gem_object_lookup(filp: file, handle: mode_cmd->handles[0]);
50 if (!obj) {
51 DRM_DEBUG_KMS("Failed to lookup GEM object\n");
52 return -ENOENT;
53 }
54
55 switch (fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) {
56 case AFBC_FORMAT_MOD_BLOCK_SIZE_32x8:
57 alignment_w = 32;
58 alignment_h = 8;
59 break;
60 case AFBC_FORMAT_MOD_BLOCK_SIZE_16x16:
61 alignment_w = 16;
62 alignment_h = 16;
63 break;
64 default:
65 WARN(1, "Invalid AFBC_FORMAT_MOD_BLOCK_SIZE: %lld.\n",
66 fb->modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK);
67 break;
68 }
69
70 /* tiled header afbc */
71 if (fb->modifier & AFBC_FORMAT_MOD_TILED) {
72 alignment_w *= AFBC_TH_LAYOUT_ALIGNMENT;
73 alignment_h *= AFBC_TH_LAYOUT_ALIGNMENT;
74 alignment_header = AFBC_TH_BODY_START_ALIGNMENT;
75 } else {
76 alignment_header = AFBC_BODY_START_ALIGNMENT;
77 }
78
79 kfb->aligned_w = ALIGN(fb->width, alignment_w);
80 kfb->aligned_h = ALIGN(fb->height, alignment_h);
81
82 if (fb->offsets[0] % alignment_header) {
83 DRM_DEBUG_KMS("afbc offset alignment check failed.\n");
84 goto check_failed;
85 }
86
87 n_blocks = (kfb->aligned_w * kfb->aligned_h) / AFBC_SUPERBLK_PIXELS;
88 kfb->offset_payload = ALIGN(n_blocks * AFBC_HEADER_SIZE,
89 alignment_header);
90
91 bpp = komeda_get_afbc_format_bpp(info, modifier: fb->modifier);
92 kfb->afbc_size = kfb->offset_payload + n_blocks *
93 ALIGN(bpp * AFBC_SUPERBLK_PIXELS / 8,
94 AFBC_SUPERBLK_ALIGNMENT);
95 min_size = kfb->afbc_size + fb->offsets[0];
96 if (min_size > obj->size) {
97 DRM_DEBUG_KMS("afbc size check failed, obj_size: 0x%zx. min_size 0x%llx.\n",
98 obj->size, min_size);
99 goto check_failed;
100 }
101
102 fb->obj[0] = obj;
103 return 0;
104
105check_failed:
106 drm_gem_object_put(obj);
107 return -EINVAL;
108}
109
110static int
111komeda_fb_none_afbc_size_check(struct komeda_dev *mdev, struct komeda_fb *kfb,
112 struct drm_file *file,
113 const struct drm_mode_fb_cmd2 *mode_cmd)
114{
115 struct drm_framebuffer *fb = &kfb->base;
116 const struct drm_format_info *info = fb->format;
117 struct drm_gem_object *obj;
118 u32 i, block_h;
119 u64 min_size;
120
121 if (komeda_fb_check_src_coords(kfb, src_x: 0, src_y: 0, src_w: fb->width, src_h: fb->height))
122 return -EINVAL;
123
124 for (i = 0; i < info->num_planes; i++) {
125 obj = drm_gem_object_lookup(filp: file, handle: mode_cmd->handles[i]);
126 if (!obj) {
127 DRM_DEBUG_KMS("Failed to lookup GEM object\n");
128 return -ENOENT;
129 }
130 fb->obj[i] = obj;
131
132 block_h = drm_format_info_block_height(info, plane: i);
133 if ((fb->pitches[i] * block_h) % mdev->chip.bus_width) {
134 DRM_DEBUG_KMS("Pitch[%d]: 0x%x doesn't align to 0x%x\n",
135 i, fb->pitches[i], mdev->chip.bus_width);
136 return -EINVAL;
137 }
138
139 min_size = komeda_fb_get_pixel_addr(kfb, x: 0, y: fb->height, plane: i)
140 - to_drm_gem_dma_obj(obj)->dma_addr;
141 if (obj->size < min_size) {
142 DRM_DEBUG_KMS("The fb->obj[%d] size: 0x%zx lower than the minimum requirement: 0x%llx.\n",
143 i, obj->size, min_size);
144 return -EINVAL;
145 }
146 }
147
148 if (fb->format->num_planes == 3) {
149 if (fb->pitches[1] != fb->pitches[2]) {
150 DRM_DEBUG_KMS("The pitch[1] and [2] are not same\n");
151 return -EINVAL;
152 }
153 }
154
155 return 0;
156}
157
158struct drm_framebuffer *
159komeda_fb_create(struct drm_device *dev, struct drm_file *file,
160 const struct drm_mode_fb_cmd2 *mode_cmd)
161{
162 struct komeda_dev *mdev = dev->dev_private;
163 struct komeda_fb *kfb;
164 int ret = 0, i;
165
166 kfb = kzalloc(sizeof(*kfb), GFP_KERNEL);
167 if (!kfb)
168 return ERR_PTR(error: -ENOMEM);
169
170 kfb->format_caps = komeda_get_format_caps(table: &mdev->fmt_tbl,
171 fourcc: mode_cmd->pixel_format,
172 modifier: mode_cmd->modifier[0]);
173 if (!kfb->format_caps) {
174 DRM_DEBUG_KMS("FMT %x is not supported.\n",
175 mode_cmd->pixel_format);
176 kfree(objp: kfb);
177 return ERR_PTR(error: -EINVAL);
178 }
179
180 drm_helper_mode_fill_fb_struct(dev, fb: &kfb->base, mode_cmd);
181
182 if (kfb->base.modifier)
183 ret = komeda_fb_afbc_size_check(kfb, file, mode_cmd);
184 else
185 ret = komeda_fb_none_afbc_size_check(mdev, kfb, file, mode_cmd);
186 if (ret < 0)
187 goto err_cleanup;
188
189 ret = drm_framebuffer_init(dev, fb: &kfb->base, funcs: &komeda_fb_funcs);
190 if (ret < 0) {
191 DRM_DEBUG_KMS("failed to initialize fb\n");
192
193 goto err_cleanup;
194 }
195
196 kfb->is_va = mdev->iommu ? true : false;
197
198 return &kfb->base;
199
200err_cleanup:
201 for (i = 0; i < kfb->base.format->num_planes; i++)
202 drm_gem_object_put(obj: kfb->base.obj[i]);
203
204 kfree(objp: kfb);
205 return ERR_PTR(error: ret);
206}
207
208int komeda_fb_check_src_coords(const struct komeda_fb *kfb,
209 u32 src_x, u32 src_y, u32 src_w, u32 src_h)
210{
211 const struct drm_framebuffer *fb = &kfb->base;
212 const struct drm_format_info *info = fb->format;
213 u32 block_w = drm_format_info_block_width(info: fb->format, plane: 0);
214 u32 block_h = drm_format_info_block_height(info: fb->format, plane: 0);
215
216 if ((src_x + src_w > fb->width) || (src_y + src_h > fb->height)) {
217 DRM_DEBUG_ATOMIC("Invalid source coordinate.\n");
218 return -EINVAL;
219 }
220
221 if ((src_x % info->hsub) || (src_w % info->hsub) ||
222 (src_y % info->vsub) || (src_h % info->vsub)) {
223 DRM_DEBUG_ATOMIC("Wrong subsampling dimension x:%d, y:%d, w:%d, h:%d for format: %x.\n",
224 src_x, src_y, src_w, src_h, info->format);
225 return -EINVAL;
226 }
227
228 if ((src_x % block_w) || (src_w % block_w) ||
229 (src_y % block_h) || (src_h % block_h)) {
230 DRM_DEBUG_ATOMIC("x:%d, y:%d, w:%d, h:%d should be multiple of block_w/h for format: %x.\n",
231 src_x, src_y, src_w, src_h, info->format);
232 return -EINVAL;
233 }
234
235 return 0;
236}
237
238dma_addr_t
239komeda_fb_get_pixel_addr(struct komeda_fb *kfb, int x, int y, int plane)
240{
241 struct drm_framebuffer *fb = &kfb->base;
242 const struct drm_gem_dma_object *obj;
243 u32 offset, plane_x, plane_y, block_w, block_sz;
244
245 if (plane >= fb->format->num_planes) {
246 DRM_DEBUG_KMS("Out of max plane num.\n");
247 return -EINVAL;
248 }
249
250 obj = drm_fb_dma_get_gem_obj(fb, plane);
251
252 offset = fb->offsets[plane];
253 if (!fb->modifier) {
254 block_w = drm_format_info_block_width(info: fb->format, plane);
255 block_sz = fb->format->char_per_block[plane];
256 plane_x = x / (plane ? fb->format->hsub : 1);
257 plane_y = y / (plane ? fb->format->vsub : 1);
258
259 offset += (plane_x / block_w) * block_sz
260 + plane_y * fb->pitches[plane];
261 }
262
263 return obj->dma_addr + offset;
264}
265
266/* if the fb can be supported by a specific layer */
267bool komeda_fb_is_layer_supported(struct komeda_fb *kfb, u32 layer_type,
268 u32 rot)
269{
270 struct drm_framebuffer *fb = &kfb->base;
271 struct komeda_dev *mdev = fb->dev->dev_private;
272 u32 fourcc = fb->format->format;
273 u64 modifier = fb->modifier;
274 bool supported;
275
276 supported = komeda_format_mod_supported(table: &mdev->fmt_tbl, layer_type,
277 fourcc, modifier, rot);
278 if (!supported)
279 DRM_DEBUG_ATOMIC("Layer TYPE: %d doesn't support fb FMT: %p4cc with modifier: 0x%llx.\n",
280 layer_type, &fourcc, modifier);
281
282 return supported;
283}
284

source code of linux/drivers/gpu/drm/arm/display/komeda/komeda_framebuffer.c