1/*
2 * Copyright (C) STMicroelectronics SA 2014
3 * Authors: Benjamin Gaignard <benjamin.gaignard@st.com>
4 *          Fabien Dessenne <fabien.dessenne@st.com>
5 *          for STMicroelectronics.
6 * License terms:  GNU General Public License (GPL), version 2
7 */
8
9#include <linux/clk.h>
10
11#include <drm/drmP.h>
12#include <drm/drm_atomic.h>
13#include <drm/drm_atomic_helper.h>
14#include <drm/drm_crtc_helper.h>
15#include <drm/drm_plane_helper.h>
16
17#include "sti_compositor.h"
18#include "sti_crtc.h"
19#include "sti_drv.h"
20#include "sti_vid.h"
21#include "sti_vtg.h"
22
23static void sti_crtc_enable(struct drm_crtc *crtc)
24{
25	struct sti_mixer *mixer = to_sti_mixer(crtc);
26	struct device *dev = mixer->dev;
27	struct sti_compositor *compo = dev_get_drvdata(dev);
28
29	DRM_DEBUG_DRIVER("\n");
30
31	mixer->status = STI_MIXER_READY;
32
33	/* Prepare and enable the compo IP clock */
34	if (mixer->id == STI_MIXER_MAIN) {
35		if (clk_prepare_enable(compo->clk_compo_main))
36			DRM_INFO("Failed to prepare/enable compo_main clk\n");
37	} else {
38		if (clk_prepare_enable(compo->clk_compo_aux))
39			DRM_INFO("Failed to prepare/enable compo_aux clk\n");
40	}
41
42	drm_crtc_vblank_on(crtc);
43}
44
45static void sti_crtc_disabling(struct drm_crtc *crtc)
46{
47	struct sti_mixer *mixer = to_sti_mixer(crtc);
48
49	DRM_DEBUG_DRIVER("\n");
50
51	mixer->status = STI_MIXER_DISABLING;
52}
53
54static bool sti_crtc_mode_fixup(struct drm_crtc *crtc,
55				const struct drm_display_mode *mode,
56				struct drm_display_mode *adjusted_mode)
57{
58	/* accept the provided drm_display_mode, do not fix it up */
59	return true;
60}
61
62static int
63sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode)
64{
65	struct sti_mixer *mixer = to_sti_mixer(crtc);
66	struct device *dev = mixer->dev;
67	struct sti_compositor *compo = dev_get_drvdata(dev);
68	struct clk *clk;
69	int rate = mode->clock * 1000;
70	int res;
71
72	DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n",
73		      crtc->base.id, sti_mixer_to_str(mixer),
74		      mode->base.id, mode->name);
75
76	DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
77		      mode->vrefresh, mode->clock,
78		      mode->hdisplay,
79		      mode->hsync_start, mode->hsync_end,
80		      mode->htotal,
81		      mode->vdisplay,
82		      mode->vsync_start, mode->vsync_end,
83		      mode->vtotal, mode->type, mode->flags);
84
85	/* Set rate and prepare/enable pixel clock */
86	if (mixer->id == STI_MIXER_MAIN)
87		clk = compo->clk_pix_main;
88	else
89		clk = compo->clk_pix_aux;
90
91	res = clk_set_rate(clk, rate);
92	if (res < 0) {
93		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
94		return -EINVAL;
95	}
96	if (clk_prepare_enable(clk)) {
97		DRM_ERROR("Failed to prepare/enable pix clk\n");
98		return -EINVAL;
99	}
100
101	sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
102			compo->vtg_main : compo->vtg_aux, &crtc->mode);
103
104	res = sti_mixer_active_video_area(mixer, &crtc->mode);
105	if (res) {
106		DRM_ERROR("Can't set active video area\n");
107		return -EINVAL;
108	}
109
110	return res;
111}
112
113static void sti_crtc_disable(struct drm_crtc *crtc)
114{
115	struct sti_mixer *mixer = to_sti_mixer(crtc);
116	struct device *dev = mixer->dev;
117	struct sti_compositor *compo = dev_get_drvdata(dev);
118
119	DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
120
121	/* Disable Background */
122	sti_mixer_set_background_status(mixer, false);
123
124	drm_crtc_vblank_off(crtc);
125
126	/* Disable pixel clock and compo IP clocks */
127	if (mixer->id == STI_MIXER_MAIN) {
128		clk_disable_unprepare(compo->clk_pix_main);
129		clk_disable_unprepare(compo->clk_compo_main);
130	} else {
131		clk_disable_unprepare(compo->clk_pix_aux);
132		clk_disable_unprepare(compo->clk_compo_aux);
133	}
134
135	mixer->status = STI_MIXER_DISABLED;
136}
137
138static void
139sti_crtc_mode_set_nofb(struct drm_crtc *crtc)
140{
141	sti_crtc_enable(crtc);
142	sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode);
143}
144
145static void sti_crtc_atomic_begin(struct drm_crtc *crtc,
146				  struct drm_crtc_state *old_crtc_state)
147{
148	struct sti_mixer *mixer = to_sti_mixer(crtc);
149
150	if (crtc->state->event) {
151		crtc->state->event->pipe = drm_crtc_index(crtc);
152
153		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
154
155		mixer->pending_event = crtc->state->event;
156		crtc->state->event = NULL;
157	}
158}
159
160static void sti_crtc_atomic_flush(struct drm_crtc *crtc,
161				  struct drm_crtc_state *old_crtc_state)
162{
163	struct drm_device *drm_dev = crtc->dev;
164	struct sti_mixer *mixer = to_sti_mixer(crtc);
165	struct sti_compositor *compo = dev_get_drvdata(mixer->dev);
166	struct drm_plane *p;
167
168	DRM_DEBUG_DRIVER("\n");
169
170	/* perform plane actions */
171	list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) {
172		struct sti_plane *plane = to_sti_plane(p);
173
174		switch (plane->status) {
175		case STI_PLANE_UPDATED:
176			/* update planes tag as updated */
177			DRM_DEBUG_DRIVER("update plane %s\n",
178					 sti_plane_to_str(plane));
179
180			if (sti_mixer_set_plane_depth(mixer, plane)) {
181				DRM_ERROR("Cannot set plane %s depth\n",
182					  sti_plane_to_str(plane));
183				break;
184			}
185
186			if (sti_mixer_set_plane_status(mixer, plane, true)) {
187				DRM_ERROR("Cannot enable plane %s at mixer\n",
188					  sti_plane_to_str(plane));
189				break;
190			}
191
192			/* if plane is HQVDP_0 then commit the vid[0] */
193			if (plane->desc == STI_HQVDP_0)
194				sti_vid_commit(compo->vid[0], p->state);
195
196			plane->status = STI_PLANE_READY;
197
198			break;
199		case STI_PLANE_DISABLING:
200			/* disabling sequence for planes tag as disabling */
201			DRM_DEBUG_DRIVER("disable plane %s from mixer\n",
202					 sti_plane_to_str(plane));
203
204			if (sti_mixer_set_plane_status(mixer, plane, false)) {
205				DRM_ERROR("Cannot disable plane %s at mixer\n",
206					  sti_plane_to_str(plane));
207				continue;
208			}
209
210			if (plane->desc == STI_CURSOR)
211				/* tag plane status for disabled */
212				plane->status = STI_PLANE_DISABLED;
213			else
214				/* tag plane status for flushing */
215				plane->status = STI_PLANE_FLUSHING;
216
217			/* if plane is HQVDP_0 then disable the vid[0] */
218			if (plane->desc == STI_HQVDP_0)
219				sti_vid_disable(compo->vid[0]);
220
221			break;
222		default:
223			/* Other status case are not handled */
224			break;
225		}
226	}
227}
228
229static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
230	.enable = sti_crtc_enable,
231	.disable = sti_crtc_disabling,
232	.mode_fixup = sti_crtc_mode_fixup,
233	.mode_set = drm_helper_crtc_mode_set,
234	.mode_set_nofb = sti_crtc_mode_set_nofb,
235	.mode_set_base = drm_helper_crtc_mode_set_base,
236	.atomic_begin = sti_crtc_atomic_begin,
237	.atomic_flush = sti_crtc_atomic_flush,
238};
239
240static void sti_crtc_destroy(struct drm_crtc *crtc)
241{
242	DRM_DEBUG_KMS("\n");
243	drm_crtc_cleanup(crtc);
244}
245
246static int sti_crtc_set_property(struct drm_crtc *crtc,
247				 struct drm_property *property,
248				 uint64_t val)
249{
250	DRM_DEBUG_KMS("\n");
251	return 0;
252}
253
254int sti_crtc_vblank_cb(struct notifier_block *nb,
255		       unsigned long event, void *data)
256{
257	struct sti_compositor *compo =
258		container_of(nb, struct sti_compositor, vtg_vblank_nb);
259	struct drm_crtc *crtc = data;
260	struct sti_mixer *mixer;
261	unsigned long flags;
262	struct sti_private *priv;
263	unsigned int pipe;
264
265	priv = crtc->dev->dev_private;
266	pipe = drm_crtc_index(crtc);
267	mixer = compo->mixer[pipe];
268
269	if ((event != VTG_TOP_FIELD_EVENT) &&
270	    (event != VTG_BOTTOM_FIELD_EVENT)) {
271		DRM_ERROR("unknown event: %lu\n", event);
272		return -EINVAL;
273	}
274
275	drm_crtc_handle_vblank(crtc);
276
277	spin_lock_irqsave(&crtc->dev->event_lock, flags);
278	if (mixer->pending_event) {
279		drm_crtc_send_vblank_event(crtc, mixer->pending_event);
280		drm_crtc_vblank_put(crtc);
281		mixer->pending_event = NULL;
282	}
283	spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
284
285	if (mixer->status == STI_MIXER_DISABLING) {
286		struct drm_plane *p;
287
288		/* Disable mixer only if all overlay planes (GDP and VDP)
289		 * are disabled */
290		list_for_each_entry(p, &crtc->dev->mode_config.plane_list,
291				    head) {
292			struct sti_plane *plane = to_sti_plane(p);
293
294			if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP)
295				if (plane->status != STI_PLANE_DISABLED)
296					return 0;
297		}
298		sti_crtc_disable(crtc);
299	}
300
301	return 0;
302}
303
304int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe)
305{
306	struct sti_private *dev_priv = dev->dev_private;
307	struct sti_compositor *compo = dev_priv->compo;
308	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
309	struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
310
311	DRM_DEBUG_DRIVER("\n");
312
313	if (sti_vtg_register_client(pipe == STI_MIXER_MAIN ?
314			compo->vtg_main : compo->vtg_aux,
315			vtg_vblank_nb, crtc)) {
316		DRM_ERROR("Cannot register VTG notifier\n");
317		return -EINVAL;
318	}
319
320	return 0;
321}
322
323void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe)
324{
325	struct sti_private *priv = drm_dev->dev_private;
326	struct sti_compositor *compo = priv->compo;
327	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
328	struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc;
329
330	DRM_DEBUG_DRIVER("\n");
331
332	if (sti_vtg_unregister_client(pipe == STI_MIXER_MAIN ?
333			compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
334		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
335
336	/* free the resources of the pending requests */
337	if (compo->mixer[pipe]->pending_event) {
338		drm_crtc_vblank_put(crtc);
339		compo->mixer[pipe]->pending_event = NULL;
340	}
341}
342
343static const struct drm_crtc_funcs sti_crtc_funcs = {
344	.set_config = drm_atomic_helper_set_config,
345	.page_flip = drm_atomic_helper_page_flip,
346	.destroy = sti_crtc_destroy,
347	.set_property = sti_crtc_set_property,
348	.reset = drm_atomic_helper_crtc_reset,
349	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
350	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
351};
352
353bool sti_crtc_is_main(struct drm_crtc *crtc)
354{
355	struct sti_mixer *mixer = to_sti_mixer(crtc);
356
357	if (mixer->id == STI_MIXER_MAIN)
358		return true;
359
360	return false;
361}
362
363int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
364		  struct drm_plane *primary, struct drm_plane *cursor)
365{
366	struct drm_crtc *crtc = &mixer->drm_crtc;
367	int res;
368
369	res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
370					&sti_crtc_funcs);
371	if (res) {
372		DRM_ERROR("Can't initialze CRTC\n");
373		return -EINVAL;
374	}
375
376	drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
377
378	DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
379			 crtc->base.id, sti_mixer_to_str(mixer));
380
381	return 0;
382}
383