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c8b75bca EA |
1 | /* |
2 | * Copyright (C) 2015 Broadcom | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | /** | |
10 | * DOC: VC4 CRTC module | |
11 | * | |
12 | * In VC4, the Pixel Valve is what most closely corresponds to the | |
13 | * DRM's concept of a CRTC. The PV generates video timings from the | |
14 | * output's clock plus its configuration. It pulls scaled pixels from | |
15 | * the HVS at that timing, and feeds it to the encoder. | |
16 | * | |
17 | * However, the DRM CRTC also collects the configuration of all the | |
18 | * DRM planes attached to it. As a result, this file also manages | |
19 | * setup of the VC4 HVS's display elements on the CRTC. | |
20 | * | |
21 | * The 2835 has 3 different pixel valves. pv0 in the audio power | |
22 | * domain feeds DSI0 or DPI, while pv1 feeds DS1 or SMI. pv2 in the | |
23 | * image domain can feed either HDMI or the SDTV controller. The | |
24 | * pixel valve chooses from the CPRMAN clocks (HSM for HDMI, VEC for | |
25 | * SDTV, etc.) according to which output type is chosen in the mux. | |
26 | * | |
27 | * For power management, the pixel valve's registers are all clocked | |
28 | * by the AXI clock, while the timings and FIFOs make use of the | |
29 | * output-specific clock. Since the encoders also directly consume | |
30 | * the CPRMAN clocks, and know what timings they need, they are the | |
31 | * ones that set the clock. | |
32 | */ | |
33 | ||
34 | #include "drm_atomic.h" | |
35 | #include "drm_atomic_helper.h" | |
36 | #include "drm_crtc_helper.h" | |
37 | #include "linux/clk.h" | |
38 | #include "linux/component.h" | |
39 | #include "linux/of_device.h" | |
40 | #include "vc4_drv.h" | |
41 | #include "vc4_regs.h" | |
42 | ||
43 | struct vc4_crtc { | |
44 | struct drm_crtc base; | |
45 | const struct vc4_crtc_data *data; | |
46 | void __iomem *regs; | |
47 | ||
48 | /* Which HVS channel we're using for our CRTC. */ | |
49 | int channel; | |
50 | ||
51 | /* Pointer to the actual hardware display list memory for the | |
52 | * crtc. | |
53 | */ | |
54 | u32 __iomem *dlist; | |
55 | ||
56 | u32 dlist_size; /* in dwords */ | |
57 | ||
58 | struct drm_pending_vblank_event *event; | |
59 | }; | |
60 | ||
61 | static inline struct vc4_crtc * | |
62 | to_vc4_crtc(struct drm_crtc *crtc) | |
63 | { | |
64 | return (struct vc4_crtc *)crtc; | |
65 | } | |
66 | ||
67 | struct vc4_crtc_data { | |
68 | /* Which channel of the HVS this pixelvalve sources from. */ | |
69 | int hvs_channel; | |
70 | ||
71 | enum vc4_encoder_type encoder0_type; | |
72 | enum vc4_encoder_type encoder1_type; | |
73 | }; | |
74 | ||
75 | #define CRTC_WRITE(offset, val) writel(val, vc4_crtc->regs + (offset)) | |
76 | #define CRTC_READ(offset) readl(vc4_crtc->regs + (offset)) | |
77 | ||
78 | #define CRTC_REG(reg) { reg, #reg } | |
79 | static const struct { | |
80 | u32 reg; | |
81 | const char *name; | |
82 | } crtc_regs[] = { | |
83 | CRTC_REG(PV_CONTROL), | |
84 | CRTC_REG(PV_V_CONTROL), | |
85 | CRTC_REG(PV_VSYNCD), | |
86 | CRTC_REG(PV_HORZA), | |
87 | CRTC_REG(PV_HORZB), | |
88 | CRTC_REG(PV_VERTA), | |
89 | CRTC_REG(PV_VERTB), | |
90 | CRTC_REG(PV_VERTA_EVEN), | |
91 | CRTC_REG(PV_VERTB_EVEN), | |
92 | CRTC_REG(PV_INTEN), | |
93 | CRTC_REG(PV_INTSTAT), | |
94 | CRTC_REG(PV_STAT), | |
95 | CRTC_REG(PV_HACT_ACT), | |
96 | }; | |
97 | ||
98 | static void vc4_crtc_dump_regs(struct vc4_crtc *vc4_crtc) | |
99 | { | |
100 | int i; | |
101 | ||
102 | for (i = 0; i < ARRAY_SIZE(crtc_regs); i++) { | |
103 | DRM_INFO("0x%04x (%s): 0x%08x\n", | |
104 | crtc_regs[i].reg, crtc_regs[i].name, | |
105 | CRTC_READ(crtc_regs[i].reg)); | |
106 | } | |
107 | } | |
108 | ||
109 | #ifdef CONFIG_DEBUG_FS | |
110 | int vc4_crtc_debugfs_regs(struct seq_file *m, void *unused) | |
111 | { | |
112 | struct drm_info_node *node = (struct drm_info_node *)m->private; | |
113 | struct drm_device *dev = node->minor->dev; | |
114 | int crtc_index = (uintptr_t)node->info_ent->data; | |
115 | struct drm_crtc *crtc; | |
116 | struct vc4_crtc *vc4_crtc; | |
117 | int i; | |
118 | ||
119 | i = 0; | |
120 | list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) { | |
121 | if (i == crtc_index) | |
122 | break; | |
123 | i++; | |
124 | } | |
125 | if (!crtc) | |
126 | return 0; | |
127 | vc4_crtc = to_vc4_crtc(crtc); | |
128 | ||
129 | for (i = 0; i < ARRAY_SIZE(crtc_regs); i++) { | |
130 | seq_printf(m, "%s (0x%04x): 0x%08x\n", | |
131 | crtc_regs[i].name, crtc_regs[i].reg, | |
132 | CRTC_READ(crtc_regs[i].reg)); | |
133 | } | |
134 | ||
135 | return 0; | |
136 | } | |
137 | #endif | |
138 | ||
139 | static void vc4_crtc_destroy(struct drm_crtc *crtc) | |
140 | { | |
141 | drm_crtc_cleanup(crtc); | |
142 | } | |
143 | ||
144 | static u32 vc4_get_fifo_full_level(u32 format) | |
145 | { | |
146 | static const u32 fifo_len_bytes = 64; | |
147 | static const u32 hvs_latency_pix = 6; | |
148 | ||
149 | switch (format) { | |
150 | case PV_CONTROL_FORMAT_DSIV_16: | |
151 | case PV_CONTROL_FORMAT_DSIC_16: | |
152 | return fifo_len_bytes - 2 * hvs_latency_pix; | |
153 | case PV_CONTROL_FORMAT_DSIV_18: | |
154 | return fifo_len_bytes - 14; | |
155 | case PV_CONTROL_FORMAT_24: | |
156 | case PV_CONTROL_FORMAT_DSIV_24: | |
157 | default: | |
158 | return fifo_len_bytes - 3 * hvs_latency_pix; | |
159 | } | |
160 | } | |
161 | ||
162 | /* | |
163 | * Returns the clock select bit for the connector attached to the | |
164 | * CRTC. | |
165 | */ | |
166 | static int vc4_get_clock_select(struct drm_crtc *crtc) | |
167 | { | |
168 | struct drm_connector *connector; | |
169 | ||
170 | drm_for_each_connector(connector, crtc->dev) { | |
2fa8e904 | 171 | if (connector->state->crtc == crtc) { |
c8b75bca EA |
172 | struct drm_encoder *encoder = connector->encoder; |
173 | struct vc4_encoder *vc4_encoder = | |
174 | to_vc4_encoder(encoder); | |
175 | ||
176 | return vc4_encoder->clock_select; | |
177 | } | |
178 | } | |
179 | ||
180 | return -1; | |
181 | } | |
182 | ||
183 | static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc) | |
184 | { | |
185 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
186 | struct drm_crtc_state *state = crtc->state; | |
187 | struct drm_display_mode *mode = &state->adjusted_mode; | |
188 | bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE; | |
189 | u32 vactive = (mode->vdisplay >> (interlace ? 1 : 0)); | |
190 | u32 format = PV_CONTROL_FORMAT_24; | |
191 | bool debug_dump_regs = false; | |
192 | int clock_select = vc4_get_clock_select(crtc); | |
193 | ||
194 | if (debug_dump_regs) { | |
195 | DRM_INFO("CRTC %d regs before:\n", drm_crtc_index(crtc)); | |
196 | vc4_crtc_dump_regs(vc4_crtc); | |
197 | } | |
198 | ||
199 | /* Reset the PV fifo. */ | |
200 | CRTC_WRITE(PV_CONTROL, 0); | |
201 | CRTC_WRITE(PV_CONTROL, PV_CONTROL_FIFO_CLR | PV_CONTROL_EN); | |
202 | CRTC_WRITE(PV_CONTROL, 0); | |
203 | ||
204 | CRTC_WRITE(PV_HORZA, | |
205 | VC4_SET_FIELD(mode->htotal - mode->hsync_end, | |
206 | PV_HORZA_HBP) | | |
207 | VC4_SET_FIELD(mode->hsync_end - mode->hsync_start, | |
208 | PV_HORZA_HSYNC)); | |
209 | CRTC_WRITE(PV_HORZB, | |
210 | VC4_SET_FIELD(mode->hsync_start - mode->hdisplay, | |
211 | PV_HORZB_HFP) | | |
212 | VC4_SET_FIELD(mode->hdisplay, PV_HORZB_HACTIVE)); | |
213 | ||
214 | if (interlace) { | |
215 | CRTC_WRITE(PV_VERTA_EVEN, | |
216 | VC4_SET_FIELD(mode->vtotal - mode->vsync_end - 1, | |
217 | PV_VERTA_VBP) | | |
218 | VC4_SET_FIELD(mode->vsync_end - mode->vsync_start, | |
219 | PV_VERTA_VSYNC)); | |
220 | CRTC_WRITE(PV_VERTB_EVEN, | |
221 | VC4_SET_FIELD(mode->vsync_start - mode->vdisplay, | |
222 | PV_VERTB_VFP) | | |
223 | VC4_SET_FIELD(vactive, PV_VERTB_VACTIVE)); | |
224 | } | |
225 | ||
226 | CRTC_WRITE(PV_HACT_ACT, mode->hdisplay); | |
227 | ||
228 | CRTC_WRITE(PV_V_CONTROL, | |
229 | PV_VCONTROL_CONTINUOUS | | |
230 | (interlace ? PV_VCONTROL_INTERLACE : 0)); | |
231 | ||
232 | CRTC_WRITE(PV_CONTROL, | |
233 | VC4_SET_FIELD(format, PV_CONTROL_FORMAT) | | |
234 | VC4_SET_FIELD(vc4_get_fifo_full_level(format), | |
235 | PV_CONTROL_FIFO_LEVEL) | | |
236 | PV_CONTROL_CLR_AT_START | | |
237 | PV_CONTROL_TRIGGER_UNDERFLOW | | |
238 | PV_CONTROL_WAIT_HSTART | | |
239 | VC4_SET_FIELD(clock_select, PV_CONTROL_CLK_SELECT) | | |
240 | PV_CONTROL_FIFO_CLR | | |
241 | PV_CONTROL_EN); | |
242 | ||
243 | if (debug_dump_regs) { | |
244 | DRM_INFO("CRTC %d regs after:\n", drm_crtc_index(crtc)); | |
245 | vc4_crtc_dump_regs(vc4_crtc); | |
246 | } | |
247 | } | |
248 | ||
249 | static void require_hvs_enabled(struct drm_device *dev) | |
250 | { | |
251 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
252 | ||
253 | WARN_ON_ONCE((HVS_READ(SCALER_DISPCTRL) & SCALER_DISPCTRL_ENABLE) != | |
254 | SCALER_DISPCTRL_ENABLE); | |
255 | } | |
256 | ||
257 | static void vc4_crtc_disable(struct drm_crtc *crtc) | |
258 | { | |
259 | struct drm_device *dev = crtc->dev; | |
260 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
261 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
262 | u32 chan = vc4_crtc->channel; | |
263 | int ret; | |
264 | require_hvs_enabled(dev); | |
265 | ||
266 | CRTC_WRITE(PV_V_CONTROL, | |
267 | CRTC_READ(PV_V_CONTROL) & ~PV_VCONTROL_VIDEN); | |
268 | ret = wait_for(!(CRTC_READ(PV_V_CONTROL) & PV_VCONTROL_VIDEN), 1); | |
269 | WARN_ONCE(ret, "Timeout waiting for !PV_VCONTROL_VIDEN\n"); | |
270 | ||
271 | if (HVS_READ(SCALER_DISPCTRLX(chan)) & | |
272 | SCALER_DISPCTRLX_ENABLE) { | |
273 | HVS_WRITE(SCALER_DISPCTRLX(chan), | |
274 | SCALER_DISPCTRLX_RESET); | |
275 | ||
276 | /* While the docs say that reset is self-clearing, it | |
277 | * seems it doesn't actually. | |
278 | */ | |
279 | HVS_WRITE(SCALER_DISPCTRLX(chan), 0); | |
280 | } | |
281 | ||
282 | /* Once we leave, the scaler should be disabled and its fifo empty. */ | |
283 | ||
284 | WARN_ON_ONCE(HVS_READ(SCALER_DISPCTRLX(chan)) & SCALER_DISPCTRLX_RESET); | |
285 | ||
286 | WARN_ON_ONCE(VC4_GET_FIELD(HVS_READ(SCALER_DISPSTATX(chan)), | |
287 | SCALER_DISPSTATX_MODE) != | |
288 | SCALER_DISPSTATX_MODE_DISABLED); | |
289 | ||
290 | WARN_ON_ONCE((HVS_READ(SCALER_DISPSTATX(chan)) & | |
291 | (SCALER_DISPSTATX_FULL | SCALER_DISPSTATX_EMPTY)) != | |
292 | SCALER_DISPSTATX_EMPTY); | |
293 | } | |
294 | ||
295 | static void vc4_crtc_enable(struct drm_crtc *crtc) | |
296 | { | |
297 | struct drm_device *dev = crtc->dev; | |
298 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
299 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
300 | struct drm_crtc_state *state = crtc->state; | |
301 | struct drm_display_mode *mode = &state->adjusted_mode; | |
302 | ||
303 | require_hvs_enabled(dev); | |
304 | ||
305 | /* Turn on the scaler, which will wait for vstart to start | |
306 | * compositing. | |
307 | */ | |
308 | HVS_WRITE(SCALER_DISPCTRLX(vc4_crtc->channel), | |
309 | VC4_SET_FIELD(mode->hdisplay, SCALER_DISPCTRLX_WIDTH) | | |
310 | VC4_SET_FIELD(mode->vdisplay, SCALER_DISPCTRLX_HEIGHT) | | |
311 | SCALER_DISPCTRLX_ENABLE); | |
312 | ||
313 | /* Turn on the pixel valve, which will emit the vstart signal. */ | |
314 | CRTC_WRITE(PV_V_CONTROL, | |
315 | CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN); | |
316 | } | |
317 | ||
318 | static int vc4_crtc_atomic_check(struct drm_crtc *crtc, | |
319 | struct drm_crtc_state *state) | |
320 | { | |
321 | struct drm_device *dev = crtc->dev; | |
322 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
323 | struct drm_plane *plane; | |
324 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
325 | u32 dlist_count = 0; | |
326 | ||
327 | /* The pixelvalve can only feed one encoder (and encoders are | |
328 | * 1:1 with connectors.) | |
329 | */ | |
330 | if (drm_atomic_connectors_for_crtc(state->state, crtc) > 1) | |
331 | return -EINVAL; | |
332 | ||
333 | drm_atomic_crtc_state_for_each_plane(plane, state) { | |
334 | struct drm_plane_state *plane_state = | |
335 | state->state->plane_states[drm_plane_index(plane)]; | |
336 | ||
337 | /* plane might not have changed, in which case take | |
338 | * current state: | |
339 | */ | |
340 | if (!plane_state) | |
341 | plane_state = plane->state; | |
342 | ||
343 | dlist_count += vc4_plane_dlist_size(plane_state); | |
344 | } | |
345 | ||
346 | dlist_count++; /* Account for SCALER_CTL0_END. */ | |
347 | ||
348 | if (!vc4_crtc->dlist || dlist_count > vc4_crtc->dlist_size) { | |
349 | vc4_crtc->dlist = ((u32 __iomem *)vc4->hvs->dlist + | |
350 | HVS_BOOTLOADER_DLIST_END); | |
351 | vc4_crtc->dlist_size = ((SCALER_DLIST_SIZE >> 2) - | |
352 | HVS_BOOTLOADER_DLIST_END); | |
353 | ||
354 | if (dlist_count > vc4_crtc->dlist_size) { | |
355 | DRM_DEBUG_KMS("dlist too large for CRTC (%d > %d).\n", | |
356 | dlist_count, vc4_crtc->dlist_size); | |
357 | return -EINVAL; | |
358 | } | |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
364 | static void vc4_crtc_atomic_flush(struct drm_crtc *crtc, | |
365 | struct drm_crtc_state *old_state) | |
366 | { | |
367 | struct drm_device *dev = crtc->dev; | |
368 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
369 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
370 | struct drm_plane *plane; | |
371 | bool debug_dump_regs = false; | |
372 | u32 __iomem *dlist_next = vc4_crtc->dlist; | |
373 | ||
374 | if (debug_dump_regs) { | |
375 | DRM_INFO("CRTC %d HVS before:\n", drm_crtc_index(crtc)); | |
376 | vc4_hvs_dump_state(dev); | |
377 | } | |
378 | ||
379 | /* Copy all the active planes' dlist contents to the hardware dlist. | |
380 | * | |
381 | * XXX: If the new display list was large enough that it | |
382 | * overlapped a currently-read display list, we need to do | |
383 | * something like disable scanout before putting in the new | |
384 | * list. For now, we're safe because we only have the two | |
385 | * planes. | |
386 | */ | |
387 | drm_atomic_crtc_for_each_plane(plane, crtc) { | |
388 | dlist_next += vc4_plane_write_dlist(plane, dlist_next); | |
389 | } | |
390 | ||
391 | if (dlist_next == vc4_crtc->dlist) { | |
392 | /* If no planes were enabled, use the SCALER_CTL0_END | |
393 | * at the start of the display list memory (in the | |
394 | * bootloader section). We'll rewrite that | |
395 | * SCALER_CTL0_END, just in case, though. | |
396 | */ | |
397 | writel(SCALER_CTL0_END, vc4->hvs->dlist); | |
398 | HVS_WRITE(SCALER_DISPLISTX(vc4_crtc->channel), 0); | |
399 | } else { | |
400 | writel(SCALER_CTL0_END, dlist_next); | |
401 | dlist_next++; | |
402 | ||
403 | HVS_WRITE(SCALER_DISPLISTX(vc4_crtc->channel), | |
36f4f69a EA |
404 | (u32 __iomem *)vc4_crtc->dlist - |
405 | (u32 __iomem *)vc4->hvs->dlist); | |
c8b75bca EA |
406 | |
407 | /* Make the next display list start after ours. */ | |
408 | vc4_crtc->dlist_size -= (dlist_next - vc4_crtc->dlist); | |
409 | vc4_crtc->dlist = dlist_next; | |
410 | } | |
411 | ||
412 | if (debug_dump_regs) { | |
413 | DRM_INFO("CRTC %d HVS after:\n", drm_crtc_index(crtc)); | |
414 | vc4_hvs_dump_state(dev); | |
415 | } | |
416 | ||
417 | if (crtc->state->event) { | |
418 | unsigned long flags; | |
419 | ||
420 | crtc->state->event->pipe = drm_crtc_index(crtc); | |
421 | ||
422 | WARN_ON(drm_crtc_vblank_get(crtc) != 0); | |
423 | ||
424 | spin_lock_irqsave(&dev->event_lock, flags); | |
425 | vc4_crtc->event = crtc->state->event; | |
426 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
427 | crtc->state->event = NULL; | |
428 | } | |
429 | } | |
430 | ||
1f43710a | 431 | int vc4_enable_vblank(struct drm_device *dev, unsigned int crtc_id) |
c8b75bca EA |
432 | { |
433 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
434 | struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id]; | |
435 | ||
436 | CRTC_WRITE(PV_INTEN, PV_INT_VFP_START); | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
1f43710a | 441 | void vc4_disable_vblank(struct drm_device *dev, unsigned int crtc_id) |
c8b75bca EA |
442 | { |
443 | struct vc4_dev *vc4 = to_vc4_dev(dev); | |
444 | struct vc4_crtc *vc4_crtc = vc4->crtc[crtc_id]; | |
445 | ||
446 | CRTC_WRITE(PV_INTEN, 0); | |
447 | } | |
448 | ||
449 | static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc) | |
450 | { | |
451 | struct drm_crtc *crtc = &vc4_crtc->base; | |
452 | struct drm_device *dev = crtc->dev; | |
453 | unsigned long flags; | |
454 | ||
455 | spin_lock_irqsave(&dev->event_lock, flags); | |
456 | if (vc4_crtc->event) { | |
457 | drm_crtc_send_vblank_event(crtc, vc4_crtc->event); | |
458 | vc4_crtc->event = NULL; | |
459 | } | |
460 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
461 | } | |
462 | ||
463 | static irqreturn_t vc4_crtc_irq_handler(int irq, void *data) | |
464 | { | |
465 | struct vc4_crtc *vc4_crtc = data; | |
466 | u32 stat = CRTC_READ(PV_INTSTAT); | |
467 | irqreturn_t ret = IRQ_NONE; | |
468 | ||
469 | if (stat & PV_INT_VFP_START) { | |
470 | CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START); | |
471 | drm_crtc_handle_vblank(&vc4_crtc->base); | |
472 | vc4_crtc_handle_page_flip(vc4_crtc); | |
473 | ret = IRQ_HANDLED; | |
474 | } | |
475 | ||
476 | return ret; | |
477 | } | |
478 | ||
479 | static const struct drm_crtc_funcs vc4_crtc_funcs = { | |
480 | .set_config = drm_atomic_helper_set_config, | |
481 | .destroy = vc4_crtc_destroy, | |
482 | .page_flip = drm_atomic_helper_page_flip, | |
483 | .set_property = NULL, | |
484 | .cursor_set = NULL, /* handled by drm_mode_cursor_universal */ | |
485 | .cursor_move = NULL, /* handled by drm_mode_cursor_universal */ | |
486 | .reset = drm_atomic_helper_crtc_reset, | |
487 | .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, | |
488 | .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, | |
489 | }; | |
490 | ||
491 | static const struct drm_crtc_helper_funcs vc4_crtc_helper_funcs = { | |
492 | .mode_set_nofb = vc4_crtc_mode_set_nofb, | |
493 | .disable = vc4_crtc_disable, | |
494 | .enable = vc4_crtc_enable, | |
495 | .atomic_check = vc4_crtc_atomic_check, | |
496 | .atomic_flush = vc4_crtc_atomic_flush, | |
497 | }; | |
498 | ||
499 | /* Frees the page flip event when the DRM device is closed with the | |
500 | * event still outstanding. | |
501 | */ | |
502 | void vc4_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file) | |
503 | { | |
504 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
505 | struct drm_device *dev = crtc->dev; | |
506 | unsigned long flags; | |
507 | ||
508 | spin_lock_irqsave(&dev->event_lock, flags); | |
509 | ||
510 | if (vc4_crtc->event && vc4_crtc->event->base.file_priv == file) { | |
511 | vc4_crtc->event->base.destroy(&vc4_crtc->event->base); | |
512 | drm_crtc_vblank_put(crtc); | |
513 | vc4_crtc->event = NULL; | |
514 | } | |
515 | ||
516 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
517 | } | |
518 | ||
519 | static const struct vc4_crtc_data pv0_data = { | |
520 | .hvs_channel = 0, | |
521 | .encoder0_type = VC4_ENCODER_TYPE_DSI0, | |
522 | .encoder1_type = VC4_ENCODER_TYPE_DPI, | |
523 | }; | |
524 | ||
525 | static const struct vc4_crtc_data pv1_data = { | |
526 | .hvs_channel = 2, | |
527 | .encoder0_type = VC4_ENCODER_TYPE_DSI1, | |
528 | .encoder1_type = VC4_ENCODER_TYPE_SMI, | |
529 | }; | |
530 | ||
531 | static const struct vc4_crtc_data pv2_data = { | |
532 | .hvs_channel = 1, | |
533 | .encoder0_type = VC4_ENCODER_TYPE_VEC, | |
534 | .encoder1_type = VC4_ENCODER_TYPE_HDMI, | |
535 | }; | |
536 | ||
537 | static const struct of_device_id vc4_crtc_dt_match[] = { | |
538 | { .compatible = "brcm,bcm2835-pixelvalve0", .data = &pv0_data }, | |
539 | { .compatible = "brcm,bcm2835-pixelvalve1", .data = &pv1_data }, | |
540 | { .compatible = "brcm,bcm2835-pixelvalve2", .data = &pv2_data }, | |
541 | {} | |
542 | }; | |
543 | ||
544 | static void vc4_set_crtc_possible_masks(struct drm_device *drm, | |
545 | struct drm_crtc *crtc) | |
546 | { | |
547 | struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); | |
548 | struct drm_encoder *encoder; | |
549 | ||
550 | drm_for_each_encoder(encoder, drm) { | |
551 | struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder); | |
552 | ||
553 | if (vc4_encoder->type == vc4_crtc->data->encoder0_type) { | |
554 | vc4_encoder->clock_select = 0; | |
555 | encoder->possible_crtcs |= drm_crtc_mask(crtc); | |
556 | } else if (vc4_encoder->type == vc4_crtc->data->encoder1_type) { | |
557 | vc4_encoder->clock_select = 1; | |
558 | encoder->possible_crtcs |= drm_crtc_mask(crtc); | |
559 | } | |
560 | } | |
561 | } | |
562 | ||
563 | static int vc4_crtc_bind(struct device *dev, struct device *master, void *data) | |
564 | { | |
565 | struct platform_device *pdev = to_platform_device(dev); | |
566 | struct drm_device *drm = dev_get_drvdata(master); | |
567 | struct vc4_dev *vc4 = to_vc4_dev(drm); | |
568 | struct vc4_crtc *vc4_crtc; | |
569 | struct drm_crtc *crtc; | |
570 | struct drm_plane *primary_plane, *cursor_plane; | |
571 | const struct of_device_id *match; | |
572 | int ret; | |
573 | ||
574 | vc4_crtc = devm_kzalloc(dev, sizeof(*vc4_crtc), GFP_KERNEL); | |
575 | if (!vc4_crtc) | |
576 | return -ENOMEM; | |
577 | crtc = &vc4_crtc->base; | |
578 | ||
579 | match = of_match_device(vc4_crtc_dt_match, dev); | |
580 | if (!match) | |
581 | return -ENODEV; | |
582 | vc4_crtc->data = match->data; | |
583 | ||
584 | vc4_crtc->regs = vc4_ioremap_regs(pdev, 0); | |
585 | if (IS_ERR(vc4_crtc->regs)) | |
586 | return PTR_ERR(vc4_crtc->regs); | |
587 | ||
588 | /* For now, we create just the primary and the legacy cursor | |
589 | * planes. We should be able to stack more planes on easily, | |
590 | * but to do that we would need to compute the bandwidth | |
591 | * requirement of the plane configuration, and reject ones | |
592 | * that will take too much. | |
593 | */ | |
594 | primary_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_PRIMARY); | |
79513237 | 595 | if (IS_ERR(primary_plane)) { |
c8b75bca EA |
596 | dev_err(dev, "failed to construct primary plane\n"); |
597 | ret = PTR_ERR(primary_plane); | |
598 | goto err; | |
599 | } | |
600 | ||
601 | cursor_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_CURSOR); | |
79513237 | 602 | if (IS_ERR(cursor_plane)) { |
c8b75bca EA |
603 | dev_err(dev, "failed to construct cursor plane\n"); |
604 | ret = PTR_ERR(cursor_plane); | |
605 | goto err_primary; | |
606 | } | |
607 | ||
608 | drm_crtc_init_with_planes(drm, crtc, primary_plane, cursor_plane, | |
609 | &vc4_crtc_funcs); | |
610 | drm_crtc_helper_add(crtc, &vc4_crtc_helper_funcs); | |
611 | primary_plane->crtc = crtc; | |
612 | cursor_plane->crtc = crtc; | |
613 | vc4->crtc[drm_crtc_index(crtc)] = vc4_crtc; | |
614 | vc4_crtc->channel = vc4_crtc->data->hvs_channel; | |
615 | ||
616 | CRTC_WRITE(PV_INTEN, 0); | |
617 | CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START); | |
618 | ret = devm_request_irq(dev, platform_get_irq(pdev, 0), | |
619 | vc4_crtc_irq_handler, 0, "vc4 crtc", vc4_crtc); | |
620 | if (ret) | |
621 | goto err_cursor; | |
622 | ||
623 | vc4_set_crtc_possible_masks(drm, crtc); | |
624 | ||
625 | platform_set_drvdata(pdev, vc4_crtc); | |
626 | ||
627 | return 0; | |
628 | ||
629 | err_cursor: | |
630 | cursor_plane->funcs->destroy(cursor_plane); | |
631 | err_primary: | |
632 | primary_plane->funcs->destroy(primary_plane); | |
633 | err: | |
634 | return ret; | |
635 | } | |
636 | ||
637 | static void vc4_crtc_unbind(struct device *dev, struct device *master, | |
638 | void *data) | |
639 | { | |
640 | struct platform_device *pdev = to_platform_device(dev); | |
641 | struct vc4_crtc *vc4_crtc = dev_get_drvdata(dev); | |
642 | ||
643 | vc4_crtc_destroy(&vc4_crtc->base); | |
644 | ||
645 | CRTC_WRITE(PV_INTEN, 0); | |
646 | ||
647 | platform_set_drvdata(pdev, NULL); | |
648 | } | |
649 | ||
650 | static const struct component_ops vc4_crtc_ops = { | |
651 | .bind = vc4_crtc_bind, | |
652 | .unbind = vc4_crtc_unbind, | |
653 | }; | |
654 | ||
655 | static int vc4_crtc_dev_probe(struct platform_device *pdev) | |
656 | { | |
657 | return component_add(&pdev->dev, &vc4_crtc_ops); | |
658 | } | |
659 | ||
660 | static int vc4_crtc_dev_remove(struct platform_device *pdev) | |
661 | { | |
662 | component_del(&pdev->dev, &vc4_crtc_ops); | |
663 | return 0; | |
664 | } | |
665 | ||
666 | struct platform_driver vc4_crtc_driver = { | |
667 | .probe = vc4_crtc_dev_probe, | |
668 | .remove = vc4_crtc_dev_remove, | |
669 | .driver = { | |
670 | .name = "vc4_crtc", | |
671 | .of_match_table = vc4_crtc_dt_match, | |
672 | }, | |
673 | }; |