1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) STMicroelectronics SA 2014
4 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
5 *          Fabien Dessenne <fabien.dessenne@st.com>
6 *          for STMicroelectronics.
7 */
8
9#include <linux/clk.h>
10
11#include <drm/drm_atomic.h>
12#include <drm/drm_atomic_helper.h>
13#include <drm/drm_device.h>
14#include <drm/drm_plane_helper.h>
15#include <drm/drm_print.h>
16#include <drm/drm_probe_helper.h>
17#include <drm/drm_vblank.h>
18
19#include "sti_compositor.h"
20#include "sti_crtc.h"
21#include "sti_drv.h"
22#include "sti_vid.h"
23#include "sti_vtg.h"
24
25static void sti_crtc_atomic_enable(struct drm_crtc *crtc,
26				   struct drm_crtc_state *old_state)
27{
28	struct sti_mixer *mixer = to_sti_mixer(crtc);
29
30	DRM_DEBUG_DRIVER("\n");
31
32	mixer->status = STI_MIXER_READY;
33
34	drm_crtc_vblank_on(crtc);
35}
36
37static void sti_crtc_atomic_disable(struct drm_crtc *crtc,
38				    struct drm_crtc_state *old_state)
39{
40	struct sti_mixer *mixer = to_sti_mixer(crtc);
41
42	DRM_DEBUG_DRIVER("\n");
43
44	mixer->status = STI_MIXER_DISABLING;
45
46	drm_crtc_wait_one_vblank(crtc);
47}
48
49static int
50sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
51{
52	struct sti_mixer *mixer = to_sti_mixer(crtc);
53	struct device *dev = mixer->dev;
54	struct sti_compositor *compo = dev_get_drvdata(dev);
55	struct clk *compo_clk, *pix_clk;
56	int rate = mode->clock * 1000;
57
58	DRM_DEBUG_KMS("CRTC:%d (%s) mode: (%s)\n",
59		      crtc->base.id, sti_mixer_to_str(mixer), mode->name);
60
61	DRM_DEBUG_KMS(DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
62
63	if (mixer->id == STI_MIXER_MAIN) {
64		compo_clk = compo->clk_compo_main;
65		pix_clk = compo->clk_pix_main;
66	} else {
67		compo_clk = compo->clk_compo_aux;
68		pix_clk = compo->clk_pix_aux;
69	}
70
71	/* Prepare and enable the compo IP clock */
72	if (clk_prepare_enable(compo_clk)) {
73		DRM_INFO("Failed to prepare/enable compositor clk\n");
74		goto compo_error;
75	}
76
77	/* Set rate and prepare/enable pixel clock */
78	if (clk_set_rate(pix_clk, rate) < 0) {
79		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
80		goto pix_error;
81	}
82	if (clk_prepare_enable(pix_clk)) {
83		DRM_ERROR("Failed to prepare/enable pix clk\n");
84		goto pix_error;
85	}
86
87	sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode);
88
89	if (sti_mixer_active_video_area(mixer, &crtc->mode)) {
90		DRM_ERROR("Can't set active video area\n");
91		goto mixer_error;
92	}
93
94	return 0;
95
96mixer_error:
97	clk_disable_unprepare(pix_clk);
98pix_error:
99	clk_disable_unprepare(compo_clk);
100compo_error:
101	return -EINVAL;
102}
103
104static void sti_crtc_disable(struct drm_crtc *crtc)
105{
106	struct sti_mixer *mixer = to_sti_mixer(crtc);
107	struct device *dev = mixer->dev;
108	struct sti_compositor *compo = dev_get_drvdata(dev);
109
110	DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
111
112	/* Disable Background */
113	sti_mixer_set_background_status(mixer, false);
114
115	drm_crtc_vblank_off(crtc);
116
117	/* Disable pixel clock and compo IP clocks */
118	if (mixer->id == STI_MIXER_MAIN) {
119		clk_disable_unprepare(compo->clk_pix_main);
120		clk_disable_unprepare(compo->clk_compo_main);
121	} else {
122		clk_disable_unprepare(compo->clk_pix_aux);
123		clk_disable_unprepare(compo->clk_compo_aux);
124	}
125
126	mixer->status = STI_MIXER_DISABLED;
127}
128
129static void
130sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
131{
132	sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
133}
134
135static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
136				  struct drm_crtc_state *old_crtc_state)
137{
138	struct drm_device *drm_dev = crtc->dev;
139	struct sti_mixer *mixer = to_sti_mixer(crtc);
140	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
141	struct drm_plane *p;
142	struct drm_pending_vblank_event *event;
143	unsigned long flags;
144
145	DRM_DEBUG_DRIVER("\n");
146
147	/* perform plane actions */
148	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
149		struct sti_plane *plane = to_sti_plane(p);
150
151		switch (plane->status) {
152		case STI_PLANE_UPDATED:
153			/* ignore update for other CRTC */
154			if (p->state->crtc != crtc)
155				continue;
156
157			/* update planes tag as updated */
158			DRM_DEBUG_DRIVER("update plane %s\n",
159					 sti_plane_to_str(plane));
160
161			if (sti_mixer_set_plane_depth(mixer, plane)) {
162				DRM_ERROR("Cannot set plane %s depth\n",
163					  sti_plane_to_str(plane));
164				break;
165			}
166
167			if (sti_mixer_set_plane_status(mixer, plane, true)) {
168				DRM_ERROR("Cannot enable plane %s at mixer\n",
169					  sti_plane_to_str(plane));
170				break;
171			}
172
173			/* if plane is HQVDP_0 then commit the vid[0] */
174			if (plane->desc == STI_HQVDP_0)
175				sti_vid_commit(compo->vid[0], p->state);
176
177			plane->status = STI_PLANE_READY;
178
179			break;
180		case STI_PLANE_DISABLING:
181			/* disabling sequence for planes tag as disabling */
182			DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
183					 sti_plane_to_str(plane));
184
185			if (sti_mixer_set_plane_status(mixer, plane, false)) {
186				DRM_ERROR("Cannot disable plane %s at mixer\n",
187					  sti_plane_to_str(plane));
188				continue;
189			}
190
191			if (plane->desc == STI_CURSOR)
192				/* tag plane status for disabled */
193				plane->status = STI_PLANE_DISABLED;
194			else
195				/* tag plane status for flushing */
196				plane->status = STI_PLANE_FLUSHING;
197
198			/* if plane is HQVDP_0 then disable the vid[0] */
199			if (plane->desc == STI_HQVDP_0)
200				sti_vid_disable(compo->vid[0]);
201
202			break;
203		default:
204			/* Other status case are not handled */
205			break;
206		}
207	}
208
209	event = crtc->state->event;
210	if (event) {
211		crtc->state->event = NULL;
212
213		spin_lock_irqsave(&crtc->dev->event_lock, flags);
214		if (drm_crtc_vblank_get(crtc) == 0)
215			drm_crtc_arm_vblank_event(crtc, event);
216		else
217			drm_crtc_send_vblank_event(crtc, event);
218		spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
219	}
220}
221
222static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
223	.mode_set_nofb = sti_crtc_mode_set_nofb,
224	.atomic_flush = sti_crtc_atomic_flush,
225	.atomic_enable = sti_crtc_atomic_enable,
226	.atomic_disable = sti_crtc_atomic_disable,
227};
228
229static void sti_crtc_destroy(struct drm_crtc *crtc)
230{
231	DRM_DEBUG_KMS("\n");
232	drm_crtc_cleanup(crtc);
233}
234
235static int sti_crtc_set_property(struct drm_crtc *crtc,
236				 struct drm_property *property,
237				 uint64_t val)
238{
239	DRM_DEBUG_KMS("\n");
240	return 0;
241}
242
243int sti_crtc_vblank_cb(struct notifier_block *nb,
244		       unsigned long event, void *data)
245{
246	struct sti_compositor *compo;
247	struct drm_crtc *crtc = data;
248	struct sti_mixer *mixer;
249	unsigned int pipe;
250
251	pipe = drm_crtc_index(crtc);
252	compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]);
253	mixer = compo->mixer[pipe];
254
255	if ((event != VTG_TOP_FIELD_EVENT) &&
256	    (event != VTG_BOTTOM_FIELD_EVENT)) {
257		DRM_ERROR("unknown event: %lu\n", event);
258		return -EINVAL;
259	}
260
261	drm_crtc_handle_vblank(crtc);
262
263	if (mixer->status == STI_MIXER_DISABLING) {
264		struct drm_plane *p;
265
266		/* Disable mixer only if all overlay planes (GDP and VDP)
267		 * are disabled */
268		list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
269				    head) {
270			struct sti_plane *plane = to_sti_plane(p);
271
272			if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
273				if (plane->status != STI_PLANE_DISABLED)
274					return 0;
275		}
276		sti_crtc_disable(crtc);
277	}
278
279	return 0;
280}
281
282static int sti_crtc_enable_vblank(struct drm_crtc *crtc)
283{
284	struct drm_device *dev = crtc->dev;
285	unsigned int pipe = crtc->index;
286	struct sti_private *dev_priv = dev->dev_private;
287	struct sti_compositor *compo = dev_priv->compo;
288	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
289	struct sti_vtg *vtg = compo->vtg[pipe];
290
291	DRM_DEBUG_DRIVER("\n");
292
293	if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) {
294		DRM_ERROR("Cannot register VTG notifier\n");
295		return -EINVAL;
296	}
297
298	return 0;
299}
300
301static void sti_crtc_disable_vblank(struct drm_crtc *crtc)
302{
303	struct drm_device *drm_dev = crtc->dev;
304	unsigned int pipe = crtc->index;
305	struct sti_private *priv = drm_dev->dev_private;
306	struct sti_compositor *compo = priv->compo;
307	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe];
308	struct sti_vtg *vtg = compo->vtg[pipe];
309
310	DRM_DEBUG_DRIVER("\n");
311
312	if (sti_vtg_unregister_client(vtg, vtg_vblank_nb))
313		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
314}
315
316static int sti_crtc_late_register(struct drm_crtc *crtc)
317{
318	struct sti_mixer *mixer = to_sti_mixer(crtc);
319	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
320
321	if (drm_crtc_index(crtc) == 0)
322		sti_compositor_debugfs_init(compo, crtc->dev->primary);
323
324	return 0;
325}
326
327static const struct drm_crtc_funcs sti_crtc_funcs = {
328	.set_config = drm_atomic_helper_set_config,
329	.page_flip = drm_atomic_helper_page_flip,
330	.destroy = sti_crtc_destroy,
331	.set_property = sti_crtc_set_property,
332	.reset = drm_atomic_helper_crtc_reset,
333	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
334	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
335	.late_register = sti_crtc_late_register,
336	.enable_vblank = sti_crtc_enable_vblank,
337	.disable_vblank = sti_crtc_disable_vblank,
338};
339
340bool sti_crtc_is_main(struct drm_crtc *crtc)
341{
342	struct sti_mixer *mixer = to_sti_mixer(crtc);
343
344	if (mixer->id == STI_MIXER_MAIN)
345		return true;
346
347	return false;
348}
349
350int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
351		  struct drm_plane *primary, struct drm_plane *cursor)
352{
353	struct drm_crtc *crtc = &mixer->drm_crtc;
354	int res;
355
356	res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
357					&sti_crtc_funcs, NULL);
358	if (res) {
359		DRM_ERROR("Can't initialize CRTC\n");
360		return -EINVAL;
361	}
362
363	drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
364
365	DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
366			 crtc->base.id, sti_mixer_to_str(mixer));
367
368	return 0;
369}
370