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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
22static const u64 modifiers[] = {
23 DRM_FORMAT_MOD_LINEAR,
24 DRM_FORMAT_MOD_ARM_AFBC(AFBC_FORMAT_MOD_BLOCK_SIZE_32x8 |
25 AFBC_FORMAT_MOD_SPLIT |
26 AFBC_FORMAT_MOD_SPARSE),
27 DRM_FORMAT_MOD_INVALID,
28};
29
30static void mtk_plane_reset(struct drm_plane *plane)
31{
32 struct mtk_plane_state *state;
33
34 if (plane->state) {
35 __drm_atomic_helper_plane_destroy_state(plane->state);
36
37 state = to_mtk_plane_state(plane->state);
38 memset(state, 0, sizeof(*state));
39 } else {
40 state = kzalloc(sizeof(*state), GFP_KERNEL);
41 if (!state)
42 return;
43 }
44
45 __drm_atomic_helper_plane_reset(plane, &state->base);
46
47 state->base.plane = plane;
48 state->pending.format = DRM_FORMAT_RGB565;
49 state->pending.modifier = DRM_FORMAT_MOD_LINEAR;
50}
51
52static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane)
53{
54 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
55 struct mtk_plane_state *state;
56
57 state = kmalloc(sizeof(*state), GFP_KERNEL);
58 if (!state)
59 return NULL;
60
61 __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
62
63 WARN_ON(state->base.plane != plane);
64
65 state->pending = old_state->pending;
66
67 return &state->base;
68}
69
70static bool mtk_plane_format_mod_supported(struct drm_plane *plane,
71 uint32_t format,
72 uint64_t modifier)
73{
74 if (modifier == DRM_FORMAT_MOD_LINEAR)
75 return true;
76
77 if (modifier != DRM_FORMAT_MOD_ARM_AFBC(
78 AFBC_FORMAT_MOD_BLOCK_SIZE_32x8 |
79 AFBC_FORMAT_MOD_SPLIT |
80 AFBC_FORMAT_MOD_SPARSE))
81 return false;
82
83 if (format != DRM_FORMAT_XRGB8888 &&
84 format != DRM_FORMAT_ARGB8888 &&
85 format != DRM_FORMAT_BGRX8888 &&
86 format != DRM_FORMAT_BGRA8888 &&
87 format != DRM_FORMAT_ABGR8888 &&
88 format != DRM_FORMAT_XBGR8888 &&
89 format != DRM_FORMAT_RGB888 &&
90 format != DRM_FORMAT_BGR888)
91 return false;
92
93 return true;
94}
95
96static void mtk_plane_destroy_state(struct drm_plane *plane,
97 struct drm_plane_state *state)
98{
99 __drm_atomic_helper_plane_destroy_state(state);
100 kfree(to_mtk_plane_state(state));
101}
102
103static int mtk_plane_atomic_async_check(struct drm_plane *plane,
104 struct drm_atomic_state *state)
105{
106 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
107 plane);
108 struct drm_crtc_state *crtc_state;
109 int ret;
110
111 if (plane != new_plane_state->crtc->cursor)
112 return -EINVAL;
113
114 if (!plane->state)
115 return -EINVAL;
116
117 if (!plane->state->fb)
118 return -EINVAL;
119
120 ret = mtk_crtc_plane_check(new_plane_state->crtc, plane,
121 to_mtk_plane_state(new_plane_state));
122 if (ret)
123 return ret;
124
125 crtc_state = drm_atomic_get_existing_crtc_state(state, new_plane_state->crtc);
126
127 return drm_atomic_helper_check_plane_state(plane->state, crtc_state,
128 DRM_PLANE_NO_SCALING,
129 DRM_PLANE_NO_SCALING,
130 true, true);
131}
132
133static void mtk_plane_update_new_state(struct drm_plane_state *new_state,
134 struct mtk_plane_state *mtk_plane_state)
135{
136 struct drm_framebuffer *fb = new_state->fb;
137 struct drm_gem_object *gem;
138 struct mtk_gem_obj *mtk_gem;
139 unsigned int pitch, format;
140 u64 modifier;
141 dma_addr_t addr;
142 dma_addr_t hdr_addr = 0;
143 unsigned int hdr_pitch = 0;
144 int offset;
145
146 gem = fb->obj[0];
147 mtk_gem = to_mtk_gem_obj(gem);
148 addr = mtk_gem->dma_addr;
149 pitch = fb->pitches[0];
150 format = fb->format->format;
151 modifier = fb->modifier;
152
153 if (modifier == DRM_FORMAT_MOD_LINEAR) {
154 /*
155 * Using dma_addr_t variable to calculate with multiplier of different types,
156 * for example: addr += (new_state->src.x1 >> 16) * fb->format->cpp[0];
157 * may cause coverity issue with unintentional overflow.
158 */
159 offset = (new_state->src.x1 >> 16) * fb->format->cpp[0];
160 addr += offset;
161 offset = (new_state->src.y1 >> 16) * pitch;
162 addr += offset;
163 } else {
164 int width_in_blocks = ALIGN(fb->width, AFBC_DATA_BLOCK_WIDTH)
165 / AFBC_DATA_BLOCK_WIDTH;
166 int height_in_blocks = ALIGN(fb->height, AFBC_DATA_BLOCK_HEIGHT)
167 / AFBC_DATA_BLOCK_HEIGHT;
168 int x_offset_in_blocks = (new_state->src.x1 >> 16) / AFBC_DATA_BLOCK_WIDTH;
169 int y_offset_in_blocks = (new_state->src.y1 >> 16) / AFBC_DATA_BLOCK_HEIGHT;
170 int hdr_size, hdr_offset;
171
172 hdr_pitch = width_in_blocks * AFBC_HEADER_BLOCK_SIZE;
173 pitch = width_in_blocks * AFBC_DATA_BLOCK_WIDTH *
174 AFBC_DATA_BLOCK_HEIGHT * fb->format->cpp[0];
175
176 hdr_size = ALIGN(hdr_pitch * height_in_blocks, AFBC_HEADER_ALIGNMENT);
177 hdr_offset = hdr_pitch * y_offset_in_blocks +
178 AFBC_HEADER_BLOCK_SIZE * x_offset_in_blocks;
179
180 /*
181 * Using dma_addr_t variable to calculate with multiplier of different types,
182 * for example: addr += hdr_pitch * y_offset_in_blocks;
183 * may cause coverity issue with unintentional overflow.
184 */
185 hdr_addr = addr + hdr_offset;
186
187 /* The data plane is offset by 1 additional block. */
188 offset = pitch * y_offset_in_blocks +
189 AFBC_DATA_BLOCK_WIDTH * AFBC_DATA_BLOCK_HEIGHT *
190 fb->format->cpp[0] * (x_offset_in_blocks + 1);
191
192 /*
193 * Using dma_addr_t variable to calculate with multiplier of different types,
194 * for example: addr += pitch * y_offset_in_blocks;
195 * may cause coverity issue with unintentional overflow.
196 */
197 addr = addr + hdr_size + offset;
198 }
199
200 mtk_plane_state->pending.enable = true;
201 mtk_plane_state->pending.pitch = pitch;
202 mtk_plane_state->pending.hdr_pitch = hdr_pitch;
203 mtk_plane_state->pending.format = format;
204 mtk_plane_state->pending.modifier = modifier;
205 mtk_plane_state->pending.addr = addr;
206 mtk_plane_state->pending.hdr_addr = hdr_addr;
207 mtk_plane_state->pending.x = new_state->dst.x1;
208 mtk_plane_state->pending.y = new_state->dst.y1;
209 mtk_plane_state->pending.width = drm_rect_width(&new_state->dst);
210 mtk_plane_state->pending.height = drm_rect_height(&new_state->dst);
211 mtk_plane_state->pending.rotation = new_state->rotation;
212 mtk_plane_state->pending.color_encoding = new_state->color_encoding;
213}
214
215static void mtk_plane_atomic_async_update(struct drm_plane *plane,
216 struct drm_atomic_state *state)
217{
218 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
219 plane);
220 struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state);
221
222 plane->state->crtc_x = new_state->crtc_x;
223 plane->state->crtc_y = new_state->crtc_y;
224 plane->state->crtc_h = new_state->crtc_h;
225 plane->state->crtc_w = new_state->crtc_w;
226 plane->state->src_x = new_state->src_x;
227 plane->state->src_y = new_state->src_y;
228 plane->state->src_h = new_state->src_h;
229 plane->state->src_w = new_state->src_w;
230 plane->state->dst.x1 = new_state->dst.x1;
231 plane->state->dst.y1 = new_state->dst.y1;
232
233 mtk_plane_update_new_state(new_state, new_plane_state);
234 swap(plane->state->fb, new_state->fb);
235 wmb(); /* Make sure the above parameters are set before update */
236 new_plane_state->pending.async_dirty = true;
237 mtk_crtc_async_update(new_state->crtc, plane, state);
238}
239
240static const struct drm_plane_funcs mtk_plane_funcs = {
241 .update_plane = drm_atomic_helper_update_plane,
242 .disable_plane = drm_atomic_helper_disable_plane,
243 .destroy = drm_plane_cleanup,
244 .reset = mtk_plane_reset,
245 .atomic_duplicate_state = mtk_plane_duplicate_state,
246 .atomic_destroy_state = mtk_plane_destroy_state,
247 .format_mod_supported = mtk_plane_format_mod_supported,
248};
249
250static int mtk_plane_atomic_check(struct drm_plane *plane,
251 struct drm_atomic_state *state)
252{
253 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
254 plane);
255 struct drm_framebuffer *fb = new_plane_state->fb;
256 struct drm_crtc_state *crtc_state;
257 int ret;
258
259 if (!fb)
260 return 0;
261
262 if (WARN_ON(!new_plane_state->crtc))
263 return 0;
264
265 ret = mtk_crtc_plane_check(new_plane_state->crtc, plane,
266 to_mtk_plane_state(new_plane_state));
267 if (ret)
268 return ret;
269
270 crtc_state = drm_atomic_get_crtc_state(state,
271 new_plane_state->crtc);
272 if (IS_ERR(crtc_state))
273 return PTR_ERR(crtc_state);
274
275 return drm_atomic_helper_check_plane_state(new_plane_state,
276 crtc_state,
277 DRM_PLANE_NO_SCALING,
278 DRM_PLANE_NO_SCALING,
279 true, true);
280}
281
282static void mtk_plane_atomic_disable(struct drm_plane *plane,
283 struct drm_atomic_state *state)
284{
285 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
286 plane);
287 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
288 mtk_plane_state->pending.enable = false;
289 wmb(); /* Make sure the above parameter is set before update */
290 mtk_plane_state->pending.dirty = true;
291}
292
293static void mtk_plane_atomic_update(struct drm_plane *plane,
294 struct drm_atomic_state *state)
295{
296 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state,
297 plane);
298 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state);
299
300 if (!new_state->crtc || WARN_ON(!new_state->fb))
301 return;
302
303 if (!new_state->visible) {
304 mtk_plane_atomic_disable(plane, state);
305 return;
306 }
307
308 mtk_plane_update_new_state(new_state, mtk_plane_state);
309 wmb(); /* Make sure the above parameters are set before update */
310 mtk_plane_state->pending.dirty = true;
311}
312
313static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
314 .atomic_check = mtk_plane_atomic_check,
315 .atomic_update = mtk_plane_atomic_update,
316 .atomic_disable = mtk_plane_atomic_disable,
317 .atomic_async_update = mtk_plane_atomic_async_update,
318 .atomic_async_check = mtk_plane_atomic_async_check,
319};
320
321int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane,
322 unsigned long possible_crtcs, enum drm_plane_type type,
323 unsigned int supported_rotations, const u32 blend_modes,
324 const u32 *formats, size_t num_formats, unsigned int plane_idx)
325{
326 int err;
327
328 if (!formats || !num_formats) {
329 DRM_ERROR("no formats for plane\n");
330 return -EINVAL;
331 }
332
333 err = drm_universal_plane_init(dev, plane, possible_crtcs,
334 &mtk_plane_funcs, formats,
335 num_formats, modifiers, type, NULL);
336 if (err) {
337 DRM_ERROR("failed to initialize plane\n");
338 return err;
339 }
340
341 /*
342 * The hardware does not support repositioning planes by muxing: their
343 * Z-position is infact fixed and the only way to change the actual
344 * order is to swap the contents of the entire register set of one
345 * overlay with another, which may be more expensive than desired.
346 *
347 * With no repositioning, the caller of this function guarantees that
348 * the plane_idx is correct. This means that, for example, the PRIMARY
349 * plane fed to this function will always have plane_idx zero.
350 */
351 err = drm_plane_create_zpos_immutable_property(plane, plane_idx);
352 if (err) {
353 DRM_ERROR("Failed to create zpos property for plane %u\n", plane_idx);
354 return err;
355 }
356
357 if (supported_rotations) {
358 err = drm_plane_create_rotation_property(plane,
359 DRM_MODE_ROTATE_0,
360 supported_rotations);
361 if (err)
362 DRM_INFO("Create rotation property failed\n");
363 }
364
365 err = drm_plane_create_alpha_property(plane);
366 if (err)
367 DRM_ERROR("failed to create property: alpha\n");
368
369 if (blend_modes) {
370 err = drm_plane_create_blend_mode_property(plane, blend_modes);
371 if (err)
372 DRM_ERROR("failed to create property: blend_mode\n");
373 }
374
375 drm_plane_helper_add(plane, &mtk_plane_helper_funcs);
376
377 return 0;
378}