[go: nahoru, domu]
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_crtc_helper.h>
13
14#include "sti_compositor.h"
15#include "sti_drm_drv.h"
16#include "sti_drm_crtc.h"
17#include "sti_vtg.h"
18
19static void sti_drm_crtc_dpms(struct drm_crtc *crtc, int mode)
20{
21	DRM_DEBUG_KMS("\n");
22}
23
24static void sti_drm_crtc_prepare(struct drm_crtc *crtc)
25{
26	struct sti_mixer *mixer = to_sti_mixer(crtc);
27	struct device *dev = mixer->dev;
28	struct sti_compositor *compo = dev_get_drvdata(dev);
29
30	compo->enable = true;
31
32	/* Prepare and enable the compo IP clock */
33	if (mixer->id == STI_MIXER_MAIN) {
34		if (clk_prepare_enable(compo->clk_compo_main))
35			DRM_INFO("Failed to prepare/enable compo_main clk\n");
36	} else {
37		if (clk_prepare_enable(compo->clk_compo_aux))
38			DRM_INFO("Failed to prepare/enable compo_aux clk\n");
39	}
40}
41
42static void sti_drm_crtc_commit(struct drm_crtc *crtc)
43{
44	struct sti_mixer *mixer = to_sti_mixer(crtc);
45	struct device *dev = mixer->dev;
46	struct sti_compositor *compo = dev_get_drvdata(dev);
47	struct sti_layer *layer;
48
49	if ((!mixer || !compo)) {
50		DRM_ERROR("Can not find mixer or compositor)\n");
51		return;
52	}
53
54	/* get GDP which is reserved to the CRTC FB */
55	layer = to_sti_layer(crtc->primary);
56	if (layer)
57		sti_layer_commit(layer);
58	else
59		DRM_ERROR("Can not find CRTC dedicated plane (GDP0)\n");
60
61	/* Enable layer on mixer */
62	if (sti_mixer_set_layer_status(mixer, layer, true))
63		DRM_ERROR("Can not enable layer at mixer\n");
64}
65
66static bool sti_drm_crtc_mode_fixup(struct drm_crtc *crtc,
67				    const struct drm_display_mode *mode,
68				    struct drm_display_mode *adjusted_mode)
69{
70	/* accept the provided drm_display_mode, do not fix it up */
71	return true;
72}
73
74static int
75sti_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
76		      struct drm_display_mode *adjusted_mode, int x, int y,
77		      struct drm_framebuffer *old_fb)
78{
79	struct sti_mixer *mixer = to_sti_mixer(crtc);
80	struct device *dev = mixer->dev;
81	struct sti_compositor *compo = dev_get_drvdata(dev);
82	struct sti_layer *layer;
83	struct clk *clk;
84	int rate = mode->clock * 1000;
85	int res;
86	unsigned int w, h;
87
88	DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d mode:%d (%s)\n",
89		      crtc->base.id, sti_mixer_to_str(mixer),
90		      crtc->primary->fb->base.id, mode->base.id, mode->name);
91
92	DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
93		      mode->vrefresh, mode->clock,
94		      mode->hdisplay,
95		      mode->hsync_start, mode->hsync_end,
96		      mode->htotal,
97		      mode->vdisplay,
98		      mode->vsync_start, mode->vsync_end,
99		      mode->vtotal, mode->type, mode->flags);
100
101	/* Set rate and prepare/enable pixel clock */
102	if (mixer->id == STI_MIXER_MAIN)
103		clk = compo->clk_pix_main;
104	else
105		clk = compo->clk_pix_aux;
106
107	res = clk_set_rate(clk, rate);
108	if (res < 0) {
109		DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate);
110		return -EINVAL;
111	}
112	if (clk_prepare_enable(clk)) {
113		DRM_ERROR("Failed to prepare/enable pix clk\n");
114		return -EINVAL;
115	}
116
117	sti_vtg_set_config(mixer->id == STI_MIXER_MAIN ?
118			compo->vtg_main : compo->vtg_aux, &crtc->mode);
119
120	/* a GDP is reserved to the CRTC FB */
121	layer = to_sti_layer(crtc->primary);
122	if (!layer) {
123		DRM_ERROR("Can not find GDP0)\n");
124		return -EINVAL;
125	}
126
127	/* copy the mode data adjusted by mode_fixup() into crtc->mode
128	 * so that hardware can be set to proper mode
129	 */
130	memcpy(&crtc->mode, adjusted_mode, sizeof(*adjusted_mode));
131
132	res = sti_mixer_set_layer_depth(mixer, layer);
133	if (res) {
134		DRM_ERROR("Can not set layer depth\n");
135		return -EINVAL;
136	}
137	res = sti_mixer_active_video_area(mixer, &crtc->mode);
138	if (res) {
139		DRM_ERROR("Can not set active video area\n");
140		return -EINVAL;
141	}
142
143	w = crtc->primary->fb->width - x;
144	h = crtc->primary->fb->height - y;
145
146	return sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
147			mixer->id, 0, 0, w, h, x, y, w, h);
148}
149
150static int sti_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
151				      struct drm_framebuffer *old_fb)
152{
153	struct sti_mixer *mixer = to_sti_mixer(crtc);
154	struct sti_layer *layer;
155	unsigned int w, h;
156	int ret;
157
158	DRM_DEBUG_KMS("CRTC:%d (%s) fb:%d (%d,%d)\n",
159		      crtc->base.id, sti_mixer_to_str(mixer),
160		      crtc->primary->fb->base.id, x, y);
161
162	/* GDP is reserved to the CRTC FB */
163	layer = to_sti_layer(crtc->primary);
164	if (!layer) {
165		DRM_ERROR("Can not find GDP0)\n");
166		ret = -EINVAL;
167		goto out;
168	}
169
170	w = crtc->primary->fb->width - crtc->x;
171	h = crtc->primary->fb->height - crtc->y;
172
173	ret = sti_layer_prepare(layer, crtc->primary->fb, &crtc->mode,
174				mixer->id, 0, 0, w, h,
175				crtc->x, crtc->y, w, h);
176	if (ret) {
177		DRM_ERROR("Can not prepare layer\n");
178		goto out;
179	}
180
181	sti_drm_crtc_commit(crtc);
182out:
183	return ret;
184}
185
186static void sti_drm_crtc_load_lut(struct drm_crtc *crtc)
187{
188	/* do nothing */
189}
190
191static void sti_drm_crtc_disable(struct drm_crtc *crtc)
192{
193	struct sti_mixer *mixer = to_sti_mixer(crtc);
194	struct device *dev = mixer->dev;
195	struct sti_compositor *compo = dev_get_drvdata(dev);
196	struct sti_layer *layer;
197
198	if (!compo->enable)
199		return;
200
201	DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer));
202
203	/* Disable Background */
204	sti_mixer_set_background_status(mixer, false);
205
206	/* Disable GDP */
207	layer = to_sti_layer(crtc->primary);
208	if (!layer) {
209		DRM_ERROR("Cannot find GDP0\n");
210		return;
211	}
212
213	/* Disable layer at mixer level */
214	if (sti_mixer_set_layer_status(mixer, layer, false))
215		DRM_ERROR("Can not disable %s layer at mixer\n",
216				sti_layer_to_str(layer));
217
218	/* Wait a while to be sure that a Vsync event is received */
219	msleep(WAIT_NEXT_VSYNC_MS);
220
221	/* Then disable layer itself */
222	sti_layer_disable(layer);
223
224	drm_vblank_off(crtc->dev, mixer->id);
225
226	/* Disable pixel clock and compo IP clocks */
227	if (mixer->id == STI_MIXER_MAIN) {
228		clk_disable_unprepare(compo->clk_pix_main);
229		clk_disable_unprepare(compo->clk_compo_main);
230	} else {
231		clk_disable_unprepare(compo->clk_pix_aux);
232		clk_disable_unprepare(compo->clk_compo_aux);
233	}
234
235	compo->enable = false;
236}
237
238static struct drm_crtc_helper_funcs sti_crtc_helper_funcs = {
239	.dpms = sti_drm_crtc_dpms,
240	.prepare = sti_drm_crtc_prepare,
241	.commit = sti_drm_crtc_commit,
242	.mode_fixup = sti_drm_crtc_mode_fixup,
243	.mode_set = sti_drm_crtc_mode_set,
244	.mode_set_base = sti_drm_crtc_mode_set_base,
245	.load_lut = sti_drm_crtc_load_lut,
246	.disable = sti_drm_crtc_disable,
247};
248
249static int sti_drm_crtc_page_flip(struct drm_crtc *crtc,
250				  struct drm_framebuffer *fb,
251				  struct drm_pending_vblank_event *event,
252				  uint32_t page_flip_flags)
253{
254	struct drm_device *drm_dev = crtc->dev;
255	struct drm_framebuffer *old_fb;
256	struct sti_mixer *mixer = to_sti_mixer(crtc);
257	unsigned long flags;
258	int ret;
259
260	DRM_DEBUG_KMS("fb %d --> fb %d\n",
261			crtc->primary->fb->base.id, fb->base.id);
262
263	mutex_lock(&drm_dev->struct_mutex);
264
265	old_fb = crtc->primary->fb;
266	crtc->primary->fb = fb;
267	ret = sti_drm_crtc_mode_set_base(crtc, crtc->x, crtc->y, old_fb);
268	if (ret) {
269		DRM_ERROR("failed\n");
270		crtc->primary->fb = old_fb;
271		goto out;
272	}
273
274	if (event) {
275		event->pipe = mixer->id;
276
277		ret = drm_vblank_get(drm_dev, event->pipe);
278		if (ret) {
279			DRM_ERROR("Cannot get vblank\n");
280			goto out;
281		}
282
283		spin_lock_irqsave(&drm_dev->event_lock, flags);
284		if (mixer->pending_event) {
285			drm_vblank_put(drm_dev, event->pipe);
286			ret = -EBUSY;
287		} else {
288			mixer->pending_event = event;
289		}
290		spin_unlock_irqrestore(&drm_dev->event_lock, flags);
291	}
292out:
293	mutex_unlock(&drm_dev->struct_mutex);
294	return ret;
295}
296
297static void sti_drm_crtc_destroy(struct drm_crtc *crtc)
298{
299	DRM_DEBUG_KMS("\n");
300	drm_crtc_cleanup(crtc);
301}
302
303static int sti_drm_crtc_set_property(struct drm_crtc *crtc,
304				     struct drm_property *property,
305				     uint64_t val)
306{
307	DRM_DEBUG_KMS("\n");
308	return 0;
309}
310
311int sti_drm_crtc_vblank_cb(struct notifier_block *nb,
312			   unsigned long event, void *data)
313{
314	struct drm_device *drm_dev;
315	struct sti_compositor *compo =
316		container_of(nb, struct sti_compositor, vtg_vblank_nb);
317	int *crtc = data;
318	unsigned long flags;
319	struct sti_drm_private *priv;
320
321	drm_dev = compo->mixer[*crtc]->drm_crtc.dev;
322	priv = drm_dev->dev_private;
323
324	if ((event != VTG_TOP_FIELD_EVENT) &&
325	    (event != VTG_BOTTOM_FIELD_EVENT)) {
326		DRM_ERROR("unknown event: %lu\n", event);
327		return -EINVAL;
328	}
329
330	drm_handle_vblank(drm_dev, *crtc);
331
332	spin_lock_irqsave(&drm_dev->event_lock, flags);
333	if (compo->mixer[*crtc]->pending_event) {
334		drm_send_vblank_event(drm_dev, -1,
335				compo->mixer[*crtc]->pending_event);
336		drm_vblank_put(drm_dev, *crtc);
337		compo->mixer[*crtc]->pending_event = NULL;
338	}
339	spin_unlock_irqrestore(&drm_dev->event_lock, flags);
340
341	return 0;
342}
343
344int sti_drm_crtc_enable_vblank(struct drm_device *dev, int crtc)
345{
346	struct sti_drm_private *dev_priv = dev->dev_private;
347	struct sti_compositor *compo = dev_priv->compo;
348	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
349
350	if (sti_vtg_register_client(crtc == STI_MIXER_MAIN ?
351			compo->vtg_main : compo->vtg_aux,
352			vtg_vblank_nb, crtc)) {
353		DRM_ERROR("Cannot register VTG notifier\n");
354		return -EINVAL;
355	}
356
357	return 0;
358}
359EXPORT_SYMBOL(sti_drm_crtc_enable_vblank);
360
361void sti_drm_crtc_disable_vblank(struct drm_device *dev, int crtc)
362{
363	struct sti_drm_private *priv = dev->dev_private;
364	struct sti_compositor *compo = priv->compo;
365	struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb;
366	unsigned long flags;
367
368	DRM_DEBUG_DRIVER("\n");
369
370	if (sti_vtg_unregister_client(crtc == STI_MIXER_MAIN ?
371			compo->vtg_main : compo->vtg_aux, vtg_vblank_nb))
372		DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n");
373
374	/* free the resources of the pending requests */
375	spin_lock_irqsave(&dev->event_lock, flags);
376	if (compo->mixer[crtc]->pending_event) {
377		drm_vblank_put(dev, crtc);
378		compo->mixer[crtc]->pending_event = NULL;
379	}
380	spin_unlock_irqrestore(&dev->event_lock, flags);
381
382}
383EXPORT_SYMBOL(sti_drm_crtc_disable_vblank);
384
385static struct drm_crtc_funcs sti_crtc_funcs = {
386	.set_config = drm_crtc_helper_set_config,
387	.page_flip = sti_drm_crtc_page_flip,
388	.destroy = sti_drm_crtc_destroy,
389	.set_property = sti_drm_crtc_set_property,
390};
391
392bool sti_drm_crtc_is_main(struct drm_crtc *crtc)
393{
394	struct sti_mixer *mixer = to_sti_mixer(crtc);
395
396	if (mixer->id == STI_MIXER_MAIN)
397		return true;
398
399	return false;
400}
401
402int sti_drm_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer,
403		struct drm_plane *primary, struct drm_plane *cursor)
404{
405	struct drm_crtc *crtc = &mixer->drm_crtc;
406	int res;
407
408	res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
409			&sti_crtc_funcs);
410	if (res) {
411		DRM_ERROR("Can not initialze CRTC\n");
412		return -EINVAL;
413	}
414
415	drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs);
416
417	DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n",
418			 crtc->base.id, sti_mixer_to_str(mixer));
419
420	return 0;
421}
422