1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2021 MediaTek Inc.
4 */
5
6#include <drm/drm_fourcc.h>
7#include <drm/drm_of.h>
8#include <linux/clk.h>
9#include <linux/component.h>
10#include <linux/of.h>
11#include <linux/of_address.h>
12#include <linux/of_platform.h>
13#include <linux/platform_device.h>
14#include <linux/pm_runtime.h>
15#include <linux/reset.h>
16#include <linux/soc/mediatek/mtk-cmdq.h>
17#include <linux/soc/mediatek/mtk-mmsys.h>
18#include <linux/soc/mediatek/mtk-mutex.h>
19
20#include "mtk_ddp_comp.h"
21#include "mtk_disp_drv.h"
22#include "mtk_drm_drv.h"
23#include "mtk_ethdr.h"
24
25#define MTK_OVL_ADAPTOR_RDMA_MAX_WIDTH 1920
26#define MTK_OVL_ADAPTOR_LAYER_NUM 4
27
28enum mtk_ovl_adaptor_comp_type {
29 OVL_ADAPTOR_TYPE_ETHDR,
30 OVL_ADAPTOR_TYPE_MDP_RDMA,
31 OVL_ADAPTOR_TYPE_MERGE,
32 OVL_ADAPTOR_TYPE_PADDING,
33 OVL_ADAPTOR_TYPE_NUM,
34};
35
36enum mtk_ovl_adaptor_comp_id {
37 OVL_ADAPTOR_ETHDR0,
38 OVL_ADAPTOR_MDP_RDMA0,
39 OVL_ADAPTOR_MDP_RDMA1,
40 OVL_ADAPTOR_MDP_RDMA2,
41 OVL_ADAPTOR_MDP_RDMA3,
42 OVL_ADAPTOR_MDP_RDMA4,
43 OVL_ADAPTOR_MDP_RDMA5,
44 OVL_ADAPTOR_MDP_RDMA6,
45 OVL_ADAPTOR_MDP_RDMA7,
46 OVL_ADAPTOR_MERGE0,
47 OVL_ADAPTOR_MERGE1,
48 OVL_ADAPTOR_MERGE2,
49 OVL_ADAPTOR_MERGE3,
50 OVL_ADAPTOR_PADDING0,
51 OVL_ADAPTOR_PADDING1,
52 OVL_ADAPTOR_PADDING2,
53 OVL_ADAPTOR_PADDING3,
54 OVL_ADAPTOR_PADDING4,
55 OVL_ADAPTOR_PADDING5,
56 OVL_ADAPTOR_PADDING6,
57 OVL_ADAPTOR_PADDING7,
58 OVL_ADAPTOR_ID_MAX
59};
60
61struct ovl_adaptor_comp_match {
62 enum mtk_ovl_adaptor_comp_type type;
63 enum mtk_ddp_comp_id comp_id;
64 int alias_id;
65 const struct mtk_ddp_comp_funcs *funcs;
66};
67
68struct mtk_disp_ovl_adaptor {
69 struct device *ovl_adaptor_comp[OVL_ADAPTOR_ID_MAX];
70 struct device *mmsys_dev;
71 bool children_bound;
72};
73
74static const char * const private_comp_stem[OVL_ADAPTOR_TYPE_NUM] = {
75 [OVL_ADAPTOR_TYPE_ETHDR] = "ethdr",
76 [OVL_ADAPTOR_TYPE_MDP_RDMA] = "vdo1-rdma",
77 [OVL_ADAPTOR_TYPE_MERGE] = "merge",
78 [OVL_ADAPTOR_TYPE_PADDING] = "padding",
79};
80
81static const struct mtk_ddp_comp_funcs ethdr = {
82 .clk_enable = mtk_ethdr_clk_enable,
83 .clk_disable = mtk_ethdr_clk_disable,
84 .start = mtk_ethdr_start,
85 .stop = mtk_ethdr_stop,
86};
87
88static const struct mtk_ddp_comp_funcs merge = {
89 .clk_enable = mtk_merge_clk_enable,
90 .clk_disable = mtk_merge_clk_disable,
91 .mode_valid = mtk_merge_mode_valid,
92};
93
94static const struct mtk_ddp_comp_funcs padding = {
95 .clk_enable = mtk_padding_clk_enable,
96 .clk_disable = mtk_padding_clk_disable,
97 .start = mtk_padding_start,
98 .stop = mtk_padding_stop,
99};
100
101static const struct mtk_ddp_comp_funcs rdma = {
102 .power_on = mtk_mdp_rdma_power_on,
103 .power_off = mtk_mdp_rdma_power_off,
104 .clk_enable = mtk_mdp_rdma_clk_enable,
105 .clk_disable = mtk_mdp_rdma_clk_disable,
106};
107
108static const struct ovl_adaptor_comp_match comp_matches[OVL_ADAPTOR_ID_MAX] = {
109 [OVL_ADAPTOR_ETHDR0] = { OVL_ADAPTOR_TYPE_ETHDR, DDP_COMPONENT_ETHDR_MIXER, 0, &ethdr },
110 [OVL_ADAPTOR_MDP_RDMA0] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA0, 0, &rdma },
111 [OVL_ADAPTOR_MDP_RDMA1] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA1, 1, &rdma },
112 [OVL_ADAPTOR_MDP_RDMA2] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA2, 2, &rdma },
113 [OVL_ADAPTOR_MDP_RDMA3] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA3, 3, &rdma },
114 [OVL_ADAPTOR_MDP_RDMA4] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA4, 4, &rdma },
115 [OVL_ADAPTOR_MDP_RDMA5] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA5, 5, &rdma },
116 [OVL_ADAPTOR_MDP_RDMA6] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA6, 6, &rdma },
117 [OVL_ADAPTOR_MDP_RDMA7] = { OVL_ADAPTOR_TYPE_MDP_RDMA, DDP_COMPONENT_MDP_RDMA7, 7, &rdma },
118 [OVL_ADAPTOR_MERGE0] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE1, 1, &merge },
119 [OVL_ADAPTOR_MERGE1] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE2, 2, &merge },
120 [OVL_ADAPTOR_MERGE2] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE3, 3, &merge },
121 [OVL_ADAPTOR_MERGE3] = { OVL_ADAPTOR_TYPE_MERGE, DDP_COMPONENT_MERGE4, 4, &merge },
122 [OVL_ADAPTOR_PADDING0] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING0, 0, &padding },
123 [OVL_ADAPTOR_PADDING1] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING1, 1, &padding },
124 [OVL_ADAPTOR_PADDING2] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING2, 2, &padding },
125 [OVL_ADAPTOR_PADDING3] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING3, 3, &padding },
126 [OVL_ADAPTOR_PADDING4] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING4, 4, &padding },
127 [OVL_ADAPTOR_PADDING5] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING5, 5, &padding },
128 [OVL_ADAPTOR_PADDING6] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING6, 6, &padding },
129 [OVL_ADAPTOR_PADDING7] = { OVL_ADAPTOR_TYPE_PADDING, DDP_COMPONENT_PADDING7, 7, &padding },
130};
131
132void mtk_ovl_adaptor_layer_config(struct device *dev, unsigned int idx,
133 struct mtk_plane_state *state,
134 struct cmdq_pkt *cmdq_pkt)
135{
136 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
137 struct mtk_plane_pending_state *pending = &state->pending;
138 struct mtk_mdp_rdma_cfg rdma_config = {0};
139 struct device *rdma_l;
140 struct device *rdma_r;
141 struct device *merge;
142 struct device *ethdr;
143 const struct drm_format_info *fmt_info = drm_format_info(format: pending->format);
144 bool use_dual_pipe = false;
145 unsigned int align_width;
146 unsigned int l_w = 0;
147 unsigned int r_w = 0;
148
149 dev_dbg(dev, "%s+ idx:%d, enable:%d, fmt:0x%x\n", __func__, idx,
150 pending->enable, pending->format);
151 dev_dbg(dev, "addr 0x%pad, fb w:%d, {%d,%d,%d,%d}\n",
152 &pending->addr, (pending->pitch / fmt_info->cpp[0]),
153 pending->x, pending->y, pending->width, pending->height);
154
155 rdma_l = ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MDP_RDMA0 + 2 * idx];
156 rdma_r = ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MDP_RDMA0 + 2 * idx + 1];
157 merge = ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MERGE0 + idx];
158 ethdr = ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0];
159
160 if (!pending->enable || !pending->width || !pending->height) {
161 mtk_merge_stop_cmdq(dev: merge, cmdq_pkt);
162 mtk_mdp_rdma_stop(dev: rdma_l, cmdq_pkt);
163 mtk_mdp_rdma_stop(dev: rdma_r, cmdq_pkt);
164 mtk_ethdr_layer_config(dev: ethdr, idx, state, cmdq_pkt);
165 return;
166 }
167
168 /* ETHDR is in 1T2P domain, width needs to be 2 pixels align */
169 align_width = ALIGN_DOWN(pending->width, 2);
170
171 if (align_width > MTK_OVL_ADAPTOR_RDMA_MAX_WIDTH)
172 use_dual_pipe = true;
173
174 if (use_dual_pipe) {
175 l_w = (align_width / 2) + ((pending->width / 2) % 2);
176 r_w = align_width - l_w;
177 } else {
178 l_w = align_width;
179 }
180 mtk_merge_advance_config(dev: merge, l_w, r_w, h: pending->height, vrefresh: 0, bpc: 0, cmdq_pkt);
181 mtk_mmsys_merge_async_config(dev: ovl_adaptor->mmsys_dev, idx, width: align_width / 2,
182 height: pending->height, cmdq_pkt);
183
184 rdma_config.width = l_w;
185 rdma_config.height = pending->height;
186 rdma_config.addr0 = pending->addr;
187 rdma_config.pitch = pending->pitch;
188 rdma_config.fmt = pending->format;
189 rdma_config.color_encoding = pending->color_encoding;
190 mtk_mdp_rdma_config(dev: rdma_l, cfg: &rdma_config, cmdq_pkt);
191
192 if (use_dual_pipe) {
193 rdma_config.x_left = l_w;
194 rdma_config.width = r_w;
195 mtk_mdp_rdma_config(dev: rdma_r, cfg: &rdma_config, cmdq_pkt);
196 }
197
198 mtk_merge_start_cmdq(dev: merge, cmdq_pkt);
199
200 mtk_mdp_rdma_start(dev: rdma_l, cmdq_pkt);
201 if (use_dual_pipe)
202 mtk_mdp_rdma_start(dev: rdma_r, cmdq_pkt);
203 else
204 mtk_mdp_rdma_stop(dev: rdma_r, cmdq_pkt);
205
206 mtk_ethdr_layer_config(dev: ethdr, idx, state, cmdq_pkt);
207}
208
209void mtk_ovl_adaptor_config(struct device *dev, unsigned int w,
210 unsigned int h, unsigned int vrefresh,
211 unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
212{
213 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
214
215 mtk_ethdr_config(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0], w, h,
216 vrefresh, bpc, cmdq_pkt);
217}
218
219void mtk_ovl_adaptor_start(struct device *dev)
220{
221 int i;
222 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
223
224 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
225 if (!ovl_adaptor->ovl_adaptor_comp[i] ||
226 !comp_matches[i].funcs->start)
227 continue;
228
229 comp_matches[i].funcs->start(ovl_adaptor->ovl_adaptor_comp[i]);
230 }
231}
232
233void mtk_ovl_adaptor_stop(struct device *dev)
234{
235 int i;
236 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
237
238 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
239 if (!ovl_adaptor->ovl_adaptor_comp[i] ||
240 !comp_matches[i].funcs->stop)
241 continue;
242
243 comp_matches[i].funcs->stop(ovl_adaptor->ovl_adaptor_comp[i]);
244 }
245}
246
247/**
248 * power_off - Power off the devices in OVL adaptor
249 * @dev: Device to be powered off
250 * @num: Number of the devices to be powered off
251 *
252 * Calls the .power_off() ovl_adaptor component callback if it is present.
253 */
254static inline void power_off(struct device *dev, int num)
255{
256 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
257 int i;
258
259 if (num > OVL_ADAPTOR_ID_MAX)
260 num = OVL_ADAPTOR_ID_MAX;
261
262 for (i = num - 1; i >= 0; i--) {
263 if (!ovl_adaptor->ovl_adaptor_comp[i] ||
264 !comp_matches[i].funcs->power_off)
265 continue;
266
267 comp_matches[i].funcs->power_off(ovl_adaptor->ovl_adaptor_comp[i]);
268 }
269}
270
271/**
272 * mtk_ovl_adaptor_power_on - Power on the devices in OVL adaptor
273 * @dev: Device to be powered on
274 *
275 * Different from OVL, OVL adaptor is a pseudo device so
276 * we didn't define it in the device tree, pm_runtime_resume_and_get()
277 * called by .atomic_enable() power on no device in OVL adaptor,
278 * we have to implement a function to do the job instead.
279 *
280 * Return: Zero for success or negative number for failure.
281 */
282int mtk_ovl_adaptor_power_on(struct device *dev)
283{
284 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
285 int i, ret;
286
287 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
288 if (!ovl_adaptor->ovl_adaptor_comp[i] ||
289 !comp_matches[i].funcs->power_on)
290 continue;
291
292 ret = comp_matches[i].funcs->power_on(ovl_adaptor->ovl_adaptor_comp[i]);
293 if (ret < 0) {
294 dev_err(dev, "Failed to enable power domain %d, err %d\n", i, ret);
295 power_off(dev, num: i);
296 return ret;
297 }
298 }
299 return 0;
300}
301
302void mtk_ovl_adaptor_power_off(struct device *dev)
303{
304 power_off(dev, num: OVL_ADAPTOR_ID_MAX);
305}
306
307int mtk_ovl_adaptor_clk_enable(struct device *dev)
308{
309 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
310 struct device *comp;
311 int ret;
312 int i;
313
314 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
315 comp = ovl_adaptor->ovl_adaptor_comp[i];
316 if (!comp || !comp_matches[i].funcs->clk_enable)
317 continue;
318 ret = comp_matches[i].funcs->clk_enable(comp);
319 if (ret) {
320 dev_err(dev, "Failed to enable clock %d, err %d\n", i, ret);
321 while (--i >= 0)
322 comp_matches[i].funcs->clk_disable(comp);
323 return ret;
324 }
325 }
326 return 0;
327}
328
329void mtk_ovl_adaptor_clk_disable(struct device *dev)
330{
331 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
332 struct device *comp;
333 int i;
334
335 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
336 comp = ovl_adaptor->ovl_adaptor_comp[i];
337 if (!comp || !comp_matches[i].funcs->clk_disable)
338 continue;
339 comp_matches[i].funcs->clk_disable(comp);
340 if (i < OVL_ADAPTOR_MERGE0)
341 pm_runtime_put(dev: comp);
342 }
343}
344
345enum drm_mode_status mtk_ovl_adaptor_mode_valid(struct device *dev,
346 const struct drm_display_mode *mode)
347
348{
349 int i;
350 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
351
352 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
353 dev = ovl_adaptor->ovl_adaptor_comp[i];
354 if (!dev || !comp_matches[i].funcs->mode_valid)
355 continue;
356 return comp_matches[i].funcs->mode_valid(dev, mode);
357 }
358 return MODE_OK;
359}
360
361unsigned int mtk_ovl_adaptor_layer_nr(struct device *dev)
362{
363 return MTK_OVL_ADAPTOR_LAYER_NUM;
364}
365
366struct device *mtk_ovl_adaptor_dma_dev_get(struct device *dev)
367{
368 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
369
370 return ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MDP_RDMA0];
371}
372
373void mtk_ovl_adaptor_register_vblank_cb(struct device *dev, void (*vblank_cb)(void *),
374 void *vblank_cb_data)
375{
376 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
377
378 mtk_ethdr_register_vblank_cb(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0],
379 vblank_cb, vblank_cb_data);
380}
381
382void mtk_ovl_adaptor_unregister_vblank_cb(struct device *dev)
383{
384 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
385
386 mtk_ethdr_unregister_vblank_cb(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]);
387}
388
389void mtk_ovl_adaptor_enable_vblank(struct device *dev)
390{
391 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
392
393 mtk_ethdr_enable_vblank(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]);
394}
395
396void mtk_ovl_adaptor_disable_vblank(struct device *dev)
397{
398 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
399
400 mtk_ethdr_disable_vblank(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]);
401}
402
403u32 mtk_ovl_adaptor_get_blend_modes(struct device *dev)
404{
405 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
406
407 return mtk_ethdr_get_blend_modes(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_ETHDR0]);
408}
409
410const u32 *mtk_ovl_adaptor_get_formats(struct device *dev)
411{
412 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
413
414 return mtk_mdp_rdma_get_formats(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MDP_RDMA0]);
415}
416
417size_t mtk_ovl_adaptor_get_num_formats(struct device *dev)
418{
419 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
420
421 return mtk_mdp_rdma_get_num_formats(dev: ovl_adaptor->ovl_adaptor_comp[OVL_ADAPTOR_MDP_RDMA0]);
422}
423
424void mtk_ovl_adaptor_add_comp(struct device *dev, struct mtk_mutex *mutex)
425{
426 int i;
427 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
428
429 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
430 if (!ovl_adaptor->ovl_adaptor_comp[i])
431 continue;
432 mtk_mutex_add_comp(mutex, id: comp_matches[i].comp_id);
433 }
434}
435
436void mtk_ovl_adaptor_remove_comp(struct device *dev, struct mtk_mutex *mutex)
437{
438 int i;
439 struct mtk_disp_ovl_adaptor *ovl_adaptor = dev_get_drvdata(dev);
440
441 for (i = 0; i < OVL_ADAPTOR_ID_MAX; i++) {
442 if (!ovl_adaptor->ovl_adaptor_comp[i])
443 continue;
444 mtk_mutex_remove_comp(mutex, id: comp_matches[i].comp_id);
445 }
446}
447
448void mtk_ovl_adaptor_connect(struct device *dev, struct device *mmsys_dev, unsigned int next)
449{
450 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_ETHDR_MIXER, next);
451 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MDP_RDMA0, next: DDP_COMPONENT_MERGE1);
452 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MDP_RDMA1, next: DDP_COMPONENT_MERGE1);
453 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MDP_RDMA2, next: DDP_COMPONENT_MERGE2);
454 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE1, next: DDP_COMPONENT_ETHDR_MIXER);
455 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE2, next: DDP_COMPONENT_ETHDR_MIXER);
456 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE3, next: DDP_COMPONENT_ETHDR_MIXER);
457 mtk_mmsys_ddp_connect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE4, next: DDP_COMPONENT_ETHDR_MIXER);
458}
459
460void mtk_ovl_adaptor_disconnect(struct device *dev, struct device *mmsys_dev, unsigned int next)
461{
462 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_ETHDR_MIXER, next);
463 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MDP_RDMA0, next: DDP_COMPONENT_MERGE1);
464 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MDP_RDMA1, next: DDP_COMPONENT_MERGE1);
465 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MDP_RDMA2, next: DDP_COMPONENT_MERGE2);
466 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE1, next: DDP_COMPONENT_ETHDR_MIXER);
467 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE2, next: DDP_COMPONENT_ETHDR_MIXER);
468 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE3, next: DDP_COMPONENT_ETHDR_MIXER);
469 mtk_mmsys_ddp_disconnect(dev: mmsys_dev, cur: DDP_COMPONENT_MERGE4, next: DDP_COMPONENT_ETHDR_MIXER);
470}
471
472static int ovl_adaptor_comp_get_id(struct device *dev, struct device_node *node,
473 enum mtk_ovl_adaptor_comp_type type)
474{
475 int alias_id = of_alias_get_id(np: node, stem: private_comp_stem[type]);
476 int i;
477
478 for (i = 0; i < ARRAY_SIZE(comp_matches); i++)
479 if (comp_matches[i].type == type &&
480 comp_matches[i].alias_id == alias_id)
481 return i;
482
483 dev_warn(dev, "Failed to get id. type: %d, alias: %d\n", type, alias_id);
484 return -EINVAL;
485}
486
487static const struct of_device_id mtk_ovl_adaptor_comp_dt_ids[] = {
488 { .compatible = "mediatek,mt8188-disp-padding", .data = (void *)OVL_ADAPTOR_TYPE_PADDING },
489 { .compatible = "mediatek,mt8195-disp-ethdr", .data = (void *)OVL_ADAPTOR_TYPE_ETHDR },
490 { .compatible = "mediatek,mt8195-disp-merge", .data = (void *)OVL_ADAPTOR_TYPE_MERGE },
491 { .compatible = "mediatek,mt8195-vdo1-rdma", .data = (void *)OVL_ADAPTOR_TYPE_MDP_RDMA },
492 { /* sentinel */ }
493};
494
495static int ovl_adaptor_of_get_ddp_comp_type(struct device_node *node,
496 enum mtk_ovl_adaptor_comp_type *ctype)
497{
498 const struct of_device_id *of_id = of_match_node(matches: mtk_ovl_adaptor_comp_dt_ids, node);
499
500 if (!of_id)
501 return -EINVAL;
502
503 *ctype = (enum mtk_ovl_adaptor_comp_type)((uintptr_t)of_id->data);
504
505 return 0;
506}
507
508bool mtk_ovl_adaptor_is_comp_present(struct device_node *node)
509{
510 enum mtk_ovl_adaptor_comp_type type;
511 int ret;
512
513 ret = ovl_adaptor_of_get_ddp_comp_type(node, ctype: &type);
514 if (ret)
515 return false;
516
517 if (type >= OVL_ADAPTOR_TYPE_NUM)
518 return false;
519
520 /*
521 * In the context of mediatek-drm, ETHDR, MDP_RDMA and Padding are
522 * used exclusively by OVL Adaptor: if this component is not one of
523 * those, it's likely not an OVL Adaptor path.
524 */
525 return type == OVL_ADAPTOR_TYPE_ETHDR ||
526 type == OVL_ADAPTOR_TYPE_MDP_RDMA ||
527 type == OVL_ADAPTOR_TYPE_PADDING;
528}
529
530static void ovl_adaptor_put_device(void *_dev)
531{
532 struct device *dev = _dev;
533
534 put_device(dev);
535}
536
537static int ovl_adaptor_comp_init(struct device *dev, struct component_match **match)
538{
539 struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev);
540 struct device_node *parent;
541 struct platform_device *comp_pdev;
542
543 parent = dev->parent->parent->of_node->parent;
544
545 for_each_child_of_node_scoped(parent, node) {
546 enum mtk_ovl_adaptor_comp_type type;
547 int id, ret;
548
549 ret = ovl_adaptor_of_get_ddp_comp_type(node, ctype: &type);
550 if (ret)
551 continue;
552
553 if (!of_device_is_available(device: node)) {
554 dev_dbg(dev, "Skipping disabled component %pOF\n",
555 node);
556 continue;
557 }
558
559 id = ovl_adaptor_comp_get_id(dev, node, type);
560 if (id < 0) {
561 dev_warn(dev, "Skipping unknown component %pOF\n",
562 node);
563 continue;
564 }
565
566 comp_pdev = of_find_device_by_node(np: node);
567 if (!comp_pdev)
568 return -EPROBE_DEFER;
569
570 ret = devm_add_action_or_reset(dev, ovl_adaptor_put_device,
571 &comp_pdev->dev);
572 if (ret)
573 return ret;
574
575 priv->ovl_adaptor_comp[id] = &comp_pdev->dev;
576
577 drm_of_component_match_add(master: dev, matchptr: match, compare: component_compare_of, node);
578 dev_dbg(dev, "Adding component match for %pOF\n", node);
579 }
580
581 if (!*match) {
582 dev_err(dev, "No match device for ovl_adaptor\n");
583 return -ENODEV;
584 }
585
586 return 0;
587}
588
589static int mtk_disp_ovl_adaptor_comp_bind(struct device *dev, struct device *master,
590 void *data)
591{
592 struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev);
593
594 if (!priv->children_bound)
595 return -EPROBE_DEFER;
596
597 return 0;
598}
599
600static void mtk_disp_ovl_adaptor_comp_unbind(struct device *dev, struct device *master,
601 void *data)
602{
603}
604
605static const struct component_ops mtk_disp_ovl_adaptor_comp_ops = {
606 .bind = mtk_disp_ovl_adaptor_comp_bind,
607 .unbind = mtk_disp_ovl_adaptor_comp_unbind,
608};
609
610static int mtk_disp_ovl_adaptor_master_bind(struct device *dev)
611{
612 struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev);
613 int ret;
614
615 ret = component_bind_all(parent: dev, data: priv->mmsys_dev);
616 if (ret)
617 return dev_err_probe(dev, err: ret, fmt: "component_bind_all failed!\n");
618
619 priv->children_bound = true;
620 return 0;
621}
622
623static void mtk_disp_ovl_adaptor_master_unbind(struct device *dev)
624{
625 struct mtk_disp_ovl_adaptor *priv = dev_get_drvdata(dev);
626
627 priv->children_bound = false;
628}
629
630static const struct component_master_ops mtk_disp_ovl_adaptor_master_ops = {
631 .bind = mtk_disp_ovl_adaptor_master_bind,
632 .unbind = mtk_disp_ovl_adaptor_master_unbind,
633};
634
635static int mtk_disp_ovl_adaptor_probe(struct platform_device *pdev)
636{
637 struct mtk_disp_ovl_adaptor *priv;
638 struct device *dev = &pdev->dev;
639 struct component_match *match = NULL;
640 int ret;
641
642 priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL);
643 if (!priv)
644 return -ENOMEM;
645
646 platform_set_drvdata(pdev, data: priv);
647
648 ret = ovl_adaptor_comp_init(dev, match: &match);
649 if (ret < 0)
650 return ret;
651
652 priv->mmsys_dev = pdev->dev.platform_data;
653
654 component_master_add_with_match(dev, &mtk_disp_ovl_adaptor_master_ops, match);
655
656 pm_runtime_enable(dev);
657
658 ret = component_add(dev, &mtk_disp_ovl_adaptor_comp_ops);
659 if (ret != 0) {
660 pm_runtime_disable(dev);
661 return dev_err_probe(dev, err: ret, fmt: "Failed to add component\n");
662 }
663
664 return 0;
665}
666
667static void mtk_disp_ovl_adaptor_remove(struct platform_device *pdev)
668{
669 component_master_del(&pdev->dev, &mtk_disp_ovl_adaptor_master_ops);
670 pm_runtime_disable(dev: &pdev->dev);
671}
672
673struct platform_driver mtk_disp_ovl_adaptor_driver = {
674 .probe = mtk_disp_ovl_adaptor_probe,
675 .remove = mtk_disp_ovl_adaptor_remove,
676 .driver = {
677 .name = "mediatek-disp-ovl-adaptor",
678 },
679};
680

source code of linux/drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c