2 * Copyright (C) 2014 Traphandler
3 * Copyright (C) 2014 Free Electrons
5 * Author: Jean-Jacques Hiblot <jjhiblot@traphandler.com>
6 * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License version 2 as published by
10 * the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * You should have received a copy of the GNU General Public License along with
18 * this program. If not, see <http://www.gnu.org/licenses/>.
21 #include <linux/clk.h>
23 #include <linux/pm_runtime.h>
25 #include <drm/drm_crtc.h>
26 #include <drm/drm_crtc_helper.h>
29 #include <video/videomode.h>
31 #include "atmel_hlcdc_dc.h"
34 * Atmel HLCDC CRTC structure
36 * @base: base DRM CRTC structure
37 * @hlcdc: pointer to the atmel_hlcdc structure provided by the MFD device
38 * @event: pointer to the current page flip event
39 * @id: CRTC id (returned by drm_crtc_index)
42 struct atmel_hlcdc_crtc {
44 struct atmel_hlcdc_dc *dc;
45 struct drm_pending_vblank_event *event;
50 static inline struct atmel_hlcdc_crtc *
51 drm_crtc_to_atmel_hlcdc_crtc(struct drm_crtc *crtc)
53 return container_of(crtc, struct atmel_hlcdc_crtc, base);
56 static void atmel_hlcdc_crtc_dpms(struct drm_crtc *c, int mode)
58 struct drm_device *dev = c->dev;
59 struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
60 struct regmap *regmap = crtc->dc->hlcdc->regmap;
63 if (mode != DRM_MODE_DPMS_ON)
64 mode = DRM_MODE_DPMS_OFF;
66 if (crtc->dpms == mode)
69 pm_runtime_get_sync(dev->dev);
71 if (mode != DRM_MODE_DPMS_ON) {
72 regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_DISP);
73 while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
74 (status & ATMEL_HLCDC_DISP))
77 regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_SYNC);
78 while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
79 (status & ATMEL_HLCDC_SYNC))
82 regmap_write(regmap, ATMEL_HLCDC_DIS, ATMEL_HLCDC_PIXEL_CLK);
83 while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
84 (status & ATMEL_HLCDC_PIXEL_CLK))
87 clk_disable_unprepare(crtc->dc->hlcdc->sys_clk);
89 pm_runtime_allow(dev->dev);
91 pm_runtime_forbid(dev->dev);
93 clk_prepare_enable(crtc->dc->hlcdc->sys_clk);
95 regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_PIXEL_CLK);
96 while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
97 !(status & ATMEL_HLCDC_PIXEL_CLK))
101 regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_SYNC);
102 while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
103 !(status & ATMEL_HLCDC_SYNC))
106 regmap_write(regmap, ATMEL_HLCDC_EN, ATMEL_HLCDC_DISP);
107 while (!regmap_read(regmap, ATMEL_HLCDC_SR, &status) &&
108 !(status & ATMEL_HLCDC_DISP))
112 pm_runtime_put_sync(dev->dev);
117 static int atmel_hlcdc_crtc_mode_set(struct drm_crtc *c,
118 struct drm_display_mode *mode,
119 struct drm_display_mode *adj,
121 struct drm_framebuffer *old_fb)
123 struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
124 struct regmap *regmap = crtc->dc->hlcdc->regmap;
125 struct drm_plane *plane = c->primary;
126 struct drm_framebuffer *fb;
127 unsigned long mode_rate;
133 if (atmel_hlcdc_dc_mode_valid(crtc->dc, adj) != MODE_OK)
136 vm.vfront_porch = adj->crtc_vsync_start - adj->crtc_vdisplay;
137 vm.vback_porch = adj->crtc_vtotal - adj->crtc_vsync_end;
138 vm.vsync_len = adj->crtc_vsync_end - adj->crtc_vsync_start;
139 vm.hfront_porch = adj->crtc_hsync_start - adj->crtc_hdisplay;
140 vm.hback_porch = adj->crtc_htotal - adj->crtc_hsync_end;
141 vm.hsync_len = adj->crtc_hsync_end - adj->crtc_hsync_start;
143 regmap_write(regmap, ATMEL_HLCDC_CFG(1),
144 (vm.hsync_len - 1) | ((vm.vsync_len - 1) << 16));
146 regmap_write(regmap, ATMEL_HLCDC_CFG(2),
147 (vm.vfront_porch - 1) | (vm.vback_porch << 16));
149 regmap_write(regmap, ATMEL_HLCDC_CFG(3),
150 (vm.hfront_porch - 1) | ((vm.hback_porch - 1) << 16));
152 regmap_write(regmap, ATMEL_HLCDC_CFG(4),
153 (adj->crtc_hdisplay - 1) |
154 ((adj->crtc_vdisplay - 1) << 16));
156 cfg = ATMEL_HLCDC_CLKPOL;
158 prate = clk_get_rate(crtc->dc->hlcdc->sys_clk);
159 mode_rate = mode->crtc_clock * 1000;
160 if ((prate / 2) < mode_rate) {
162 cfg |= ATMEL_HLCDC_CLKSEL;
165 div = DIV_ROUND_UP(prate, mode_rate);
169 cfg |= ATMEL_HLCDC_CLKDIV(div);
171 regmap_update_bits(regmap, ATMEL_HLCDC_CFG(0),
172 ATMEL_HLCDC_CLKSEL | ATMEL_HLCDC_CLKDIV_MASK |
173 ATMEL_HLCDC_CLKPOL, cfg);
177 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
178 cfg |= ATMEL_HLCDC_VSPOL;
180 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
181 cfg |= ATMEL_HLCDC_HSPOL;
183 regmap_update_bits(regmap, ATMEL_HLCDC_CFG(5),
184 ATMEL_HLCDC_HSPOL | ATMEL_HLCDC_VSPOL |
185 ATMEL_HLCDC_VSPDLYS | ATMEL_HLCDC_VSPDLYE |
186 ATMEL_HLCDC_DISPPOL | ATMEL_HLCDC_DISPDLY |
187 ATMEL_HLCDC_VSPSU | ATMEL_HLCDC_VSPHO |
188 ATMEL_HLCDC_GUARDTIME_MASK,
194 return atmel_hlcdc_plane_update_with_mode(plane, c, fb, 0, 0,
195 adj->hdisplay, adj->vdisplay,
202 int atmel_hlcdc_crtc_mode_set_base(struct drm_crtc *c, int x, int y,
203 struct drm_framebuffer *old_fb)
205 struct drm_plane *plane = c->primary;
206 struct drm_framebuffer *fb = plane->fb;
207 struct drm_display_mode *mode = &c->hwmode;
211 return plane->funcs->update_plane(plane, c, fb,
216 mode->hdisplay << 16,
217 mode->vdisplay << 16);
220 static void atmel_hlcdc_crtc_prepare(struct drm_crtc *crtc)
222 atmel_hlcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
225 static void atmel_hlcdc_crtc_commit(struct drm_crtc *crtc)
227 atmel_hlcdc_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
230 static bool atmel_hlcdc_crtc_mode_fixup(struct drm_crtc *crtc,
231 const struct drm_display_mode *mode,
232 struct drm_display_mode *adjusted_mode)
237 static void atmel_hlcdc_crtc_disable(struct drm_crtc *crtc)
239 struct drm_plane *plane;
241 atmel_hlcdc_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
242 crtc->primary->funcs->disable_plane(crtc->primary);
244 drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
245 if (plane->crtc != crtc)
248 plane->funcs->disable_plane(crtc->primary);
253 static const struct drm_crtc_helper_funcs lcdc_crtc_helper_funcs = {
254 .mode_fixup = atmel_hlcdc_crtc_mode_fixup,
255 .dpms = atmel_hlcdc_crtc_dpms,
256 .mode_set = atmel_hlcdc_crtc_mode_set,
257 .mode_set_base = atmel_hlcdc_crtc_mode_set_base,
258 .prepare = atmel_hlcdc_crtc_prepare,
259 .commit = atmel_hlcdc_crtc_commit,
260 .disable = atmel_hlcdc_crtc_disable,
263 static void atmel_hlcdc_crtc_destroy(struct drm_crtc *c)
265 struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
271 void atmel_hlcdc_crtc_cancel_page_flip(struct drm_crtc *c,
272 struct drm_file *file)
274 struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
275 struct drm_pending_vblank_event *event;
276 struct drm_device *dev = c->dev;
279 spin_lock_irqsave(&dev->event_lock, flags);
281 if (event && event->base.file_priv == file) {
282 event->base.destroy(&event->base);
283 drm_vblank_put(dev, crtc->id);
286 spin_unlock_irqrestore(&dev->event_lock, flags);
289 static void atmel_hlcdc_crtc_finish_page_flip(struct atmel_hlcdc_crtc *crtc)
291 struct drm_device *dev = crtc->base.dev;
294 spin_lock_irqsave(&dev->event_lock, flags);
296 drm_send_vblank_event(dev, crtc->id, crtc->event);
297 drm_vblank_put(dev, crtc->id);
300 spin_unlock_irqrestore(&dev->event_lock, flags);
303 void atmel_hlcdc_crtc_irq(struct drm_crtc *c)
305 drm_handle_vblank(c->dev, 0);
306 atmel_hlcdc_crtc_finish_page_flip(drm_crtc_to_atmel_hlcdc_crtc(c));
309 static int atmel_hlcdc_crtc_page_flip(struct drm_crtc *c,
310 struct drm_framebuffer *fb,
311 struct drm_pending_vblank_event *event,
312 uint32_t page_flip_flags)
314 struct atmel_hlcdc_crtc *crtc = drm_crtc_to_atmel_hlcdc_crtc(c);
315 struct atmel_hlcdc_plane_update_req req;
316 struct drm_plane *plane = c->primary;
317 struct drm_device *dev = c->dev;
321 spin_lock_irqsave(&dev->event_lock, flags);
324 spin_unlock_irqrestore(&dev->event_lock, flags);
329 memset(&req, 0, sizeof(req));
332 req.crtc_h = c->mode.crtc_vdisplay;
333 req.crtc_w = c->mode.crtc_hdisplay;
334 req.src_x = c->x << 16;
335 req.src_y = c->y << 16;
336 req.src_w = req.crtc_w << 16;
337 req.src_h = req.crtc_h << 16;
340 ret = atmel_hlcdc_plane_prepare_update_req(plane, &req, &c->hwmode);
345 drm_vblank_get(c->dev, crtc->id);
346 spin_lock_irqsave(&dev->event_lock, flags);
348 spin_unlock_irqrestore(&dev->event_lock, flags);
351 ret = atmel_hlcdc_plane_apply_update_req(plane, &req);
360 static const struct drm_crtc_funcs atmel_hlcdc_crtc_funcs = {
361 .page_flip = atmel_hlcdc_crtc_page_flip,
362 .set_config = drm_crtc_helper_set_config,
363 .destroy = atmel_hlcdc_crtc_destroy,
366 int atmel_hlcdc_crtc_create(struct drm_device *dev)
368 struct atmel_hlcdc_dc *dc = dev->dev_private;
369 struct atmel_hlcdc_planes *planes = dc->planes;
370 struct atmel_hlcdc_crtc *crtc;
374 crtc = kzalloc(sizeof(*crtc), GFP_KERNEL);
378 crtc->dpms = DRM_MODE_DPMS_OFF;
381 ret = drm_crtc_init_with_planes(dev, &crtc->base,
382 &planes->primary->base,
383 planes->cursor ? &planes->cursor->base : NULL,
384 &atmel_hlcdc_crtc_funcs);
388 crtc->id = drm_crtc_index(&crtc->base);
391 planes->cursor->base.possible_crtcs = 1 << crtc->id;
393 for (i = 0; i < planes->noverlays; i++)
394 planes->overlays[i]->base.possible_crtcs = 1 << crtc->id;
396 drm_crtc_helper_add(&crtc->base, &lcdc_crtc_helper_funcs);
398 dc->crtc = &crtc->base;
403 atmel_hlcdc_crtc_destroy(&crtc->base);