1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2015 MediaTek Inc.
4 * Author: CK Hu <ck.hu@mediatek.com>
5 */
6
7 #include <drm/drm_atomic.h>
8 #include <drm/drm_atomic_helper.h>
9 #include <drm/drm_atomic_uapi.h>
10 #include <drm/drm_blend.h>
11 #include <drm/drm_fourcc.h>
12 #include <drm/drm_framebuffer.h>
13 #include <drm/drm_gem_atomic_helper.h>
14 #include <linux/align.h>
15
16 #include "mtk_crtc.h"
17 #include "mtk_ddp_comp.h"
18 #include "mtk_drm_drv.h"
19 #include "mtk_gem.h"
20 #include "mtk_plane.h"
21
22 static const u64 modifiers[] = {
23 DRM_FORMAT_MOD_LINEAR,
24 DRM_FORMAT_MOD_INVALID,
25 };
26
mtk_plane_reset(struct drm_plane * plane)27 static void mtk_plane_reset(struct drm_plane *plane)
28 {
29 struct mtk_plane_state *state;
30
31 if (plane->state) {
32 __drm_atomic_helper_plane_destroy_state(plane->state);
33
34 state = to_mtk_plane_state(plane->state);
35 memset(state, 0, sizeof(*state));
36 } else {
37 state = kzalloc(sizeof(*state), GFP_KERNEL);
38 if (!state)
39 return;
40 }
41
42 __drm_atomic_helper_plane_reset(plane, &state->base);
43
44 state->base.plane = plane;
45 state->pending.format = DRM_FORMAT_RGB565;
46 state->pending.modifier = DRM_FORMAT_MOD_LINEAR;
47 }
48
mtk_plane_duplicate_state(struct drm_plane * plane)49 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
50 {
51 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
52 struct mtk_plane_state *state;
53
54 state = kmalloc(sizeof(*state), GFP_KERNEL);
55 if (!state)
56 return NULL;
57
58 __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
59
60 WARN_ON(state->base.plane != plane);
61
62 state->pending = old_state->pending;
63
64 return &state->base;
65 }
66
mtk_plane_format_mod_supported(struct drm_plane * plane,uint32_t format,uint64_t modifier)67 static bool mtk_plane_format_mod_supported(struct drm_plane *plane,
68 uint32_t format,
69 uint64_t modifier)
70 {
71 return modifier == DRM_FORMAT_MOD_LINEAR;
72 }
73
mtk_plane_destroy_state(struct drm_plane * plane,struct drm_plane_state * state)74 static void mtk_plane_destroy_state(struct drm_plane *plane,
75 struct drm_plane_state *state)
76 {
77 __drm_atomic_helper_plane_destroy_state(state);
78 kfree(to_mtk_plane_state(state));
79 }
80
mtk_plane_atomic_async_check(struct drm_plane * plane,struct drm_atomic_state * state,bool flip)81 static int mtk_plane_atomic_async_check(struct drm_plane *plane,
82 struct drm_atomic_state *state, bool flip)
83 {
84 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
85 plane);
86 struct drm_crtc_state *crtc_state;
87 int ret;
88
89 if (plane != new_plane_state->crtc->cursor)
90 return -EINVAL;
91
92 if (!plane->state)
93 return -EINVAL;
94
95 if (!plane->state->fb)
96 return -EINVAL;
97
98 ret = mtk_crtc_plane_check(new_plane_state->crtc, plane,
99 to_mtk_plane_state(new_plane_state));
100 if (ret)
101 return ret;
102
103 crtc_state = drm_atomic_get_existing_crtc_state(state, new_plane_state->crtc);
104
105 return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
106 DRM_PLANE_NO_SCALING,
107 DRM_PLANE_NO_SCALING,
108 true, true);
109 }
110
mtk_plane_update_new_state(struct drm_plane_state * new_state,struct mtk_plane_state * mtk_plane_state)111 static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
112 struct mtk_plane_state *mtk_plane_state)
113 {
114 struct drm_framebuffer *fb = new_state->fb;
115 struct drm_gem_object *gem;
116 struct mtk_gem_obj *mtk_gem;
117 unsigned int pitch, format;
118 u64 modifier;
119 dma_addr_t addr;
120 dma_addr_t hdr_addr = 0;
121 unsigned int hdr_pitch = 0;
122 int offset;
123
124 gem = fb->obj[0];
125 mtk_gem = to_mtk_gem_obj(gem);
126 addr = mtk_gem->dma_addr;
127 pitch = fb->pitches[0];
128 format = fb->format->format;
129 modifier = fb->modifier;
130
131 if (modifier == DRM_FORMAT_MOD_LINEAR) {
132 /*
133 * Using dma_addr_t variable to calculate with multiplier of different types,
134 * for example: addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
135 * may cause coverity issue with unintentional overflow.
136 */
137 offset = (new_state->src.x1 >> 16) * fb->format->cpp[0];
138 addr += offset;
139 offset = (new_state->src.y1 >> 16) * pitch;
140 addr += offset;
141 } else {
142 int width_in_blocks = ALIGN(fb->width, AFBC_DATA_BLOCK_WIDTH)
143 / AFBC_DATA_BLOCK_WIDTH;
144 int height_in_blocks = ALIGN(fb->height, AFBC_DATA_BLOCK_HEIGHT)
145 / AFBC_DATA_BLOCK_HEIGHT;
146 int x_offset_in_blocks = (new_state->src.x1 >> 16) / AFBC_DATA_BLOCK_WIDTH;
147 int y_offset_in_blocks = (new_state->src.y1 >> 16) / AFBC_DATA_BLOCK_HEIGHT;
148 int hdr_size, hdr_offset;
149
150 hdr_pitch = width_in_blocks * AFBC_HEADER_BLOCK_SIZE;
151 pitch = width_in_blocks * AFBC_DATA_BLOCK_WIDTH *
152 AFBC_DATA_BLOCK_HEIGHT * fb->format->cpp[0];
153
154 hdr_size = ALIGN(hdr_pitch * height_in_blocks, AFBC_HEADER_ALIGNMENT);
155 hdr_offset = hdr_pitch * y_offset_in_blocks +
156 AFBC_HEADER_BLOCK_SIZE * x_offset_in_blocks;
157
158 /*
159 * Using dma_addr_t variable to calculate with multiplier of different types,
160 * for example: addr += hdr_pitch * y_offset_in_blocks;
161 * may cause coverity issue with unintentional overflow.
162 */
163 hdr_addr = addr + hdr_offset;
164
165 /* The data plane is offset by 1 additional block. */
166 offset = pitch * y_offset_in_blocks +
167 AFBC_DATA_BLOCK_WIDTH * AFBC_DATA_BLOCK_HEIGHT *
168 fb->format->cpp[0] * (x_offset_in_blocks + 1);
169
170 /*
171 * Using dma_addr_t variable to calculate with multiplier of different types,
172 * for example: addr += pitch * y_offset_in_blocks;
173 * may cause coverity issue with unintentional overflow.
174 */
175 addr = addr + hdr_size + offset;
176 }
177
178 mtk_plane_state->pending.enable = true;
179 mtk_plane_state->pending.pitch = pitch;
180 mtk_plane_state->pending.hdr_pitch = hdr_pitch;
181 mtk_plane_state->pending.format = format;
182 mtk_plane_state->pending.modifier = modifier;
183 mtk_plane_state->pending.addr = addr;
184 mtk_plane_state->pending.hdr_addr = hdr_addr;
185 mtk_plane_state->pending.x = new_state->dst.x1;
186 mtk_plane_state->pending.y = new_state->dst.y1;
187 mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
188 mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
189 mtk_plane_state->pending.rotation = new_state->rotation;
190 mtk_plane_state->pending.color_encoding = new_state->color_encoding;
191 }
192
mtk_plane_atomic_async_update(struct drm_plane * plane,struct drm_atomic_state * state)193 static void mtk_plane_atomic_async_update(struct drm_plane *plane,
194 struct drm_atomic_state *state)
195 {
196 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
197 plane);
198 struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
199
200 plane->state->crtc_x = new_state->crtc_x;
201 plane->state->crtc_y = new_state->crtc_y;
202 plane->state->crtc_h = new_state->crtc_h;
203 plane->state->crtc_w = new_state->crtc_w;
204 plane->state->src_x = new_state->src_x;
205 plane->state->src_y = new_state->src_y;
206 plane->state->src_h = new_state->src_h;
207 plane->state->src_w = new_state->src_w;
208 plane->state->dst.x1 = new_state->dst.x1;
209 plane->state->dst.y1 = new_state->dst.y1;
210
211 mtk_plane_update_new_state(new_state, new_plane_state);
212 swap(plane->state->fb, new_state->fb);
213 wmb(); /* Make sure the above parameters are set before update */
214 new_plane_state->pending.async_dirty = true;
215 mtk_crtc_async_update(new_state->crtc, plane, state);
216 }
217
218 static const struct drm_plane_funcs mtk_plane_funcs = {
219 .update_plane = drm_atomic_helper_update_plane,
220 .disable_plane = drm_atomic_helper_disable_plane,
221 .destroy = drm_plane_cleanup,
222 .reset = mtk_plane_reset,
223 .atomic_duplicate_state = mtk_plane_duplicate_state,
224 .atomic_destroy_state = mtk_plane_destroy_state,
225 .format_mod_supported = mtk_plane_format_mod_supported,
226 };
227
mtk_plane_atomic_check(struct drm_plane * plane,struct drm_atomic_state * state)228 static int mtk_plane_atomic_check(struct drm_plane *plane,
229 struct drm_atomic_state *state)
230 {
231 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
232 plane);
233 struct drm_framebuffer *fb = new_plane_state->fb;
234 struct drm_crtc_state *crtc_state;
235 int ret;
236
237 if (!fb)
238 return 0;
239
240 if (WARN_ON(!new_plane_state->crtc))
241 return 0;
242
243 ret = mtk_crtc_plane_check(new_plane_state->crtc, plane,
244 to_mtk_plane_state(new_plane_state));
245 if (ret)
246 return ret;
247
248 crtc_state = drm_atomic_get_crtc_state(state,
249 new_plane_state->crtc);
250 if (IS_ERR(crtc_state))
251 return PTR_ERR(crtc_state);
252
253 return drm_atomic_helper_check_plane_state(new_plane_state,
254 crtc_state,
255 DRM_PLANE_NO_SCALING,
256 DRM_PLANE_NO_SCALING,
257 true, true);
258 }
259
mtk_plane_atomic_disable(struct drm_plane * plane,struct drm_atomic_state * state)260 static void mtk_plane_atomic_disable(struct drm_plane *plane,
261 struct drm_atomic_state *state)
262 {
263 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
264 plane);
265 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
266 struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
267 plane);
268
269 mtk_plane_state->pending.enable = false;
270 wmb(); /* Make sure the above parameter is set before update */
271 mtk_plane_state->pending.dirty = true;
272
273 if (old_state && old_state->crtc)
274 mtk_crtc_plane_disable(old_state->crtc, plane);
275 }
276
mtk_plane_atomic_update(struct drm_plane * plane,struct drm_atomic_state * state)277 static void mtk_plane_atomic_update(struct drm_plane *plane,
278 struct drm_atomic_state *state)
279 {
280 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
281 plane);
282 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
283
284 if (!new_state->crtc || WARN_ON(!new_state->fb))
285 return;
286
287 if (!new_state->visible) {
288 mtk_plane_atomic_disable(plane, state);
289 return;
290 }
291
292 mtk_plane_update_new_state(new_state, mtk_plane_state);
293 wmb(); /* Make sure the above parameters are set before update */
294 mtk_plane_state->pending.dirty = true;
295 }
296
297 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
298 .atomic_check = mtk_plane_atomic_check,
299 .atomic_update = mtk_plane_atomic_update,
300 .atomic_disable = mtk_plane_atomic_disable,
301 .atomic_async_update = mtk_plane_atomic_async_update,
302 .atomic_async_check = mtk_plane_atomic_async_check,
303 };
304
mtk_plane_init(struct drm_device * dev,struct drm_plane * plane,unsigned long possible_crtcs,enum drm_plane_type type,unsigned int supported_rotations,const u32 blend_modes,const u32 * formats,size_t num_formats,bool supports_afbc,unsigned int plane_idx)305 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
306 unsigned long possible_crtcs, enum drm_plane_type type,
307 unsigned int supported_rotations, const u32 blend_modes,
308 const u32 *formats, size_t num_formats,
309 bool supports_afbc, unsigned int plane_idx)
310 {
311 int err;
312
313 if (!formats || !num_formats) {
314 DRM_ERROR("no formats for plane\n");
315 return -EINVAL;
316 }
317
318 err = drm_universal_plane_init(dev, plane, possible_crtcs,
319 &mtk_plane_funcs, formats,
320 num_formats,
321 supports_afbc ? modifiers : NULL,
322 type, NULL);
323 if (err) {
324 DRM_ERROR("failed to initialize plane\n");
325 return err;
326 }
327
328 /*
329 * The hardware does not support repositioning planes by muxing: their
330 * Z-position is infact fixed and the only way to change the actual
331 * order is to swap the contents of the entire register set of one
332 * overlay with another, which may be more expensive than desired.
333 *
334 * With no repositioning, the caller of this function guarantees that
335 * the plane_idx is correct. This means that, for example, the PRIMARY
336 * plane fed to this function will always have plane_idx zero.
337 */
338 err = drm_plane_create_zpos_immutable_property(plane, plane_idx);
339 if (err) {
340 DRM_ERROR("Failed to create zpos property for plane %u\n", plane_idx);
341 return err;
342 }
343
344 if (supported_rotations) {
345 err = drm_plane_create_rotation_property(plane,
346 DRM_MODE_ROTATE_0,
347 supported_rotations);
348 if (err)
349 DRM_INFO("Create rotation property failed\n");
350 }
351
352 err = drm_plane_create_alpha_property(plane);
353 if (err)
354 DRM_ERROR("failed to create property: alpha\n");
355
356 if (blend_modes) {
357 err = drm_plane_create_blend_mode_property(plane, blend_modes);
358 if (err)
359 DRM_ERROR("failed to create property: blend_mode\n");
360 }
361
362 drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
363
364 return 0;
365 }
366