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16ea975e RC |
1 | /* |
2 | * Copyright (C) 2012 Texas Instruments | |
3 | * Author: Rob Clark <robdclark@gmail.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License version 2 as published by | |
7 | * the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program. If not, see <http://www.gnu.org/licenses/>. | |
16 | */ | |
17 | ||
ce2f2c3f | 18 | #include <drm/drm_atomic.h> |
305198de | 19 | #include <drm/drm_atomic_helper.h> |
ce2f2c3f SP |
20 | #include <drm/drm_crtc.h> |
21 | #include <drm/drm_flip_work.h> | |
22 | #include <drm/drm_plane_helper.h> | |
4e910c7a | 23 | #include <linux/workqueue.h> |
9345235e BG |
24 | #include <linux/completion.h> |
25 | #include <linux/dma-mapping.h> | |
16ea975e RC |
26 | |
27 | #include "tilcdc_drv.h" | |
28 | #include "tilcdc_regs.h" | |
29 | ||
9345235e | 30 | #define TILCDC_VBLANK_SAFETY_THRESHOLD_US 1000 |
55e165c4 JS |
31 | #define TILCDC_PALETTE_SIZE 32 |
32 | #define TILCDC_PALETTE_FIRST_ENTRY 0x4000 | |
2b3a8cd7 | 33 | |
16ea975e RC |
34 | struct tilcdc_crtc { |
35 | struct drm_crtc base; | |
36 | ||
47f571c6 | 37 | struct drm_plane primary; |
16ea975e | 38 | const struct tilcdc_panel_info *info; |
16ea975e | 39 | struct drm_pending_vblank_event *event; |
2d53a180 | 40 | struct mutex enable_lock; |
47bfd6c0 | 41 | bool enabled; |
2d53a180 | 42 | bool shutdown; |
16ea975e RC |
43 | wait_queue_head_t frame_done_wq; |
44 | bool frame_done; | |
2b3a8cd7 TV |
45 | spinlock_t irq_lock; |
46 | ||
642e5167 JS |
47 | unsigned int lcd_fck_rate; |
48 | ||
2b3a8cd7 | 49 | ktime_t last_vblank; |
16ea975e | 50 | |
2b2080d7 | 51 | struct drm_framebuffer *curr_fb; |
2b3a8cd7 | 52 | struct drm_framebuffer *next_fb; |
16ea975e RC |
53 | |
54 | /* for deferred fb unref's: */ | |
a464d618 | 55 | struct drm_flip_work unref_work; |
103cd8bc JS |
56 | |
57 | /* Only set if an external encoder is connected */ | |
58 | bool simulate_vesa_sync; | |
5895d08f JS |
59 | |
60 | int sync_lost_count; | |
61 | bool frame_intact; | |
13b3d727 | 62 | struct work_struct recover_work; |
9345235e BG |
63 | |
64 | dma_addr_t palette_dma_handle; | |
55e165c4 | 65 | u16 *palette_base; |
9345235e | 66 | struct completion palette_loaded; |
16ea975e RC |
67 | }; |
68 | #define to_tilcdc_crtc(x) container_of(x, struct tilcdc_crtc, base) | |
69 | ||
a464d618 | 70 | static void unref_worker(struct drm_flip_work *work, void *val) |
16ea975e | 71 | { |
f7b45756 | 72 | struct tilcdc_crtc *tilcdc_crtc = |
a464d618 | 73 | container_of(work, struct tilcdc_crtc, unref_work); |
16ea975e | 74 | struct drm_device *dev = tilcdc_crtc->base.dev; |
16ea975e RC |
75 | |
76 | mutex_lock(&dev->mode_config.mutex); | |
a464d618 | 77 | drm_framebuffer_unreference(val); |
16ea975e RC |
78 | mutex_unlock(&dev->mode_config.mutex); |
79 | } | |
80 | ||
2b2080d7 | 81 | static void set_scanout(struct drm_crtc *crtc, struct drm_framebuffer *fb) |
16ea975e RC |
82 | { |
83 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
84 | struct drm_device *dev = crtc->dev; | |
4c268d63 | 85 | struct tilcdc_drm_private *priv = dev->dev_private; |
16ea975e | 86 | struct drm_gem_cma_object *gem; |
2b2080d7 | 87 | dma_addr_t start, end; |
7eb9f069 | 88 | u64 dma_base_and_ceiling; |
16ea975e | 89 | |
16ea975e RC |
90 | gem = drm_fb_cma_get_gem_obj(fb, 0); |
91 | ||
2b2080d7 TV |
92 | start = gem->paddr + fb->offsets[0] + |
93 | crtc->y * fb->pitches[0] + | |
353c8598 | 94 | crtc->x * fb->format->cpp[0]; |
16ea975e | 95 | |
2b2080d7 | 96 | end = start + (crtc->mode.vdisplay * fb->pitches[0]); |
16ea975e | 97 | |
7eb9f069 JS |
98 | /* Write LCDC_DMA_FB_BASE_ADDR_0_REG and LCDC_DMA_FB_CEILING_ADDR_0_REG |
99 | * with a single insruction, if available. This should make it more | |
100 | * unlikely that LCDC would fetch the DMA addresses in the middle of | |
101 | * an update. | |
102 | */ | |
4c268d63 DS |
103 | if (priv->rev == 1) |
104 | end -= 1; | |
105 | ||
106 | dma_base_and_ceiling = (u64)end << 32 | start; | |
7eb9f069 | 107 | tilcdc_write64(dev, LCDC_DMA_FB_BASE_ADDR_0_REG, dma_base_and_ceiling); |
2b2080d7 TV |
108 | |
109 | if (tilcdc_crtc->curr_fb) | |
110 | drm_flip_work_queue(&tilcdc_crtc->unref_work, | |
111 | tilcdc_crtc->curr_fb); | |
112 | ||
113 | tilcdc_crtc->curr_fb = fb; | |
16ea975e RC |
114 | } |
115 | ||
9345235e | 116 | /* |
55e165c4 JS |
117 | * The driver currently only supports only true color formats. For |
118 | * true color the palette block is bypassed, but a 32 byte palette | |
119 | * should still be loaded. The first 16-bit entry must be 0x4000 while | |
120 | * all other entries must be zeroed. | |
9345235e BG |
121 | */ |
122 | static void tilcdc_crtc_load_palette(struct drm_crtc *crtc) | |
123 | { | |
55e165c4 JS |
124 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); |
125 | struct drm_device *dev = crtc->dev; | |
126 | struct tilcdc_drm_private *priv = dev->dev_private; | |
e59f5af9 | 127 | int ret; |
9345235e | 128 | |
274c34db | 129 | reinit_completion(&tilcdc_crtc->palette_loaded); |
9345235e BG |
130 | |
131 | /* Tell the LCDC where the palette is located. */ | |
132 | tilcdc_write(dev, LCDC_DMA_FB_BASE_ADDR_0_REG, | |
133 | tilcdc_crtc->palette_dma_handle); | |
134 | tilcdc_write(dev, LCDC_DMA_FB_CEILING_ADDR_0_REG, | |
55e165c4 JS |
135 | (u32) tilcdc_crtc->palette_dma_handle + |
136 | TILCDC_PALETTE_SIZE - 1); | |
9345235e | 137 | |
55e165c4 JS |
138 | /* Set dma load mode for palette loading only. */ |
139 | tilcdc_write_mask(dev, LCDC_RASTER_CTRL_REG, | |
140 | LCDC_PALETTE_LOAD_MODE(PALETTE_ONLY), | |
141 | LCDC_PALETTE_LOAD_MODE_MASK); | |
142 | ||
143 | /* Enable DMA Palette Loaded Interrupt */ | |
144 | if (priv->rev == 1) | |
145 | tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA); | |
146 | else | |
147 | tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG, LCDC_V2_PL_INT_ENA); | |
9345235e | 148 | |
55e165c4 JS |
149 | /* Enable LCDC DMA and wait for palette to be loaded. */ |
150 | tilcdc_clear_irqstatus(dev, 0xffffffff); | |
9345235e BG |
151 | tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE); |
152 | ||
e59f5af9 JS |
153 | ret = wait_for_completion_timeout(&tilcdc_crtc->palette_loaded, |
154 | msecs_to_jiffies(50)); | |
155 | if (ret == 0) | |
156 | dev_err(dev->dev, "%s: Palette loading timeout", __func__); | |
9345235e | 157 | |
55e165c4 | 158 | /* Disable LCDC DMA and DMA Palette Loaded Interrupt. */ |
9345235e | 159 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE); |
55e165c4 JS |
160 | if (priv->rev == 1) |
161 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_V1_PL_INT_ENA); | |
162 | else | |
163 | tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, LCDC_V2_PL_INT_ENA); | |
9345235e BG |
164 | } |
165 | ||
afaf833d JS |
166 | static void tilcdc_crtc_enable_irqs(struct drm_device *dev) |
167 | { | |
168 | struct tilcdc_drm_private *priv = dev->dev_private; | |
169 | ||
170 | tilcdc_clear_irqstatus(dev, 0xffffffff); | |
171 | ||
172 | if (priv->rev == 1) { | |
173 | tilcdc_set(dev, LCDC_RASTER_CTRL_REG, | |
3672583f | 174 | LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_FRAME_DONE_INT_ENA | |
afaf833d | 175 | LCDC_V1_UNDERFLOW_INT_ENA); |
8d6c3f7d KB |
176 | tilcdc_set(dev, LCDC_DMA_CTRL_REG, |
177 | LCDC_V1_END_OF_FRAME_INT_ENA); | |
afaf833d JS |
178 | } else { |
179 | tilcdc_write(dev, LCDC_INT_ENABLE_SET_REG, | |
180 | LCDC_V2_UNDERFLOW_INT_ENA | | |
181 | LCDC_V2_END_OF_FRAME0_INT_ENA | | |
182 | LCDC_FRAME_DONE | LCDC_SYNC_LOST); | |
183 | } | |
184 | } | |
185 | ||
186 | static void tilcdc_crtc_disable_irqs(struct drm_device *dev) | |
187 | { | |
188 | struct tilcdc_drm_private *priv = dev->dev_private; | |
189 | ||
190 | /* disable irqs that we might have enabled: */ | |
191 | if (priv->rev == 1) { | |
192 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, | |
3672583f | 193 | LCDC_V1_SYNC_LOST_INT_ENA | LCDC_V1_FRAME_DONE_INT_ENA | |
afaf833d JS |
194 | LCDC_V1_UNDERFLOW_INT_ENA | LCDC_V1_PL_INT_ENA); |
195 | tilcdc_clear(dev, LCDC_DMA_CTRL_REG, | |
196 | LCDC_V1_END_OF_FRAME_INT_ENA); | |
197 | } else { | |
198 | tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, | |
199 | LCDC_V2_UNDERFLOW_INT_ENA | LCDC_V2_PL_INT_ENA | | |
200 | LCDC_V2_END_OF_FRAME0_INT_ENA | | |
201 | LCDC_FRAME_DONE | LCDC_SYNC_LOST); | |
202 | } | |
203 | } | |
204 | ||
2efec4f3 | 205 | static void reset(struct drm_crtc *crtc) |
16ea975e RC |
206 | { |
207 | struct drm_device *dev = crtc->dev; | |
208 | struct tilcdc_drm_private *priv = dev->dev_private; | |
209 | ||
2efec4f3 TV |
210 | if (priv->rev != 2) |
211 | return; | |
212 | ||
213 | tilcdc_set(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET); | |
214 | usleep_range(250, 1000); | |
215 | tilcdc_clear(dev, LCDC_CLK_RESET_REG, LCDC_CLK_MAIN_RESET); | |
216 | } | |
217 | ||
cb42e20e BG |
218 | /* |
219 | * Calculate the percentage difference between the requested pixel clock rate | |
220 | * and the effective rate resulting from calculating the clock divider value. | |
221 | */ | |
222 | static unsigned int tilcdc_pclk_diff(unsigned long rate, | |
223 | unsigned long real_rate) | |
224 | { | |
225 | int r = rate / 100, rr = real_rate / 100; | |
226 | ||
227 | return (unsigned int)(abs(((rr - r) * 100) / r)); | |
228 | } | |
229 | ||
642e5167 JS |
230 | static void tilcdc_crtc_set_clk(struct drm_crtc *crtc) |
231 | { | |
232 | struct drm_device *dev = crtc->dev; | |
233 | struct tilcdc_drm_private *priv = dev->dev_private; | |
234 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
cb42e20e BG |
235 | unsigned long clk_rate, real_rate, req_rate; |
236 | unsigned int clkdiv; | |
642e5167 JS |
237 | int ret; |
238 | ||
cb42e20e BG |
239 | clkdiv = 2; /* first try using a standard divider of 2 */ |
240 | ||
642e5167 | 241 | /* mode.clock is in KHz, set_rate wants parameter in Hz */ |
cb42e20e BG |
242 | req_rate = crtc->mode.clock * 1000; |
243 | ||
244 | ret = clk_set_rate(priv->clk, req_rate * clkdiv); | |
245 | clk_rate = clk_get_rate(priv->clk); | |
642e5167 | 246 | if (ret < 0) { |
cb42e20e BG |
247 | /* |
248 | * If we fail to set the clock rate (some architectures don't | |
249 | * use the common clock framework yet and may not implement | |
250 | * all the clk API calls for every clock), try the next best | |
251 | * thing: adjusting the clock divider, unless clk_get_rate() | |
252 | * failed as well. | |
253 | */ | |
254 | if (!clk_rate) { | |
255 | /* Nothing more we can do. Just bail out. */ | |
256 | dev_err(dev->dev, | |
257 | "failed to set the pixel clock - unable to read current lcdc clock rate\n"); | |
258 | return; | |
259 | } | |
260 | ||
261 | clkdiv = DIV_ROUND_CLOSEST(clk_rate, req_rate); | |
262 | ||
263 | /* | |
264 | * Emit a warning if the real clock rate resulting from the | |
265 | * calculated divider differs much from the requested rate. | |
266 | * | |
267 | * 5% is an arbitrary value - LCDs are usually quite tolerant | |
268 | * about pixel clock rates. | |
269 | */ | |
270 | real_rate = clkdiv * req_rate; | |
271 | ||
272 | if (tilcdc_pclk_diff(clk_rate, real_rate) > 5) { | |
273 | dev_warn(dev->dev, | |
274 | "effective pixel clock rate (%luHz) differs from the calculated rate (%luHz)\n", | |
275 | clk_rate, real_rate); | |
276 | } | |
642e5167 JS |
277 | } |
278 | ||
cb42e20e | 279 | tilcdc_crtc->lcd_fck_rate = clk_rate; |
642e5167 JS |
280 | |
281 | DBG("lcd_clk=%u, mode clock=%d, div=%u", | |
282 | tilcdc_crtc->lcd_fck_rate, crtc->mode.clock, clkdiv); | |
283 | ||
284 | /* Configure the LCD clock divisor. */ | |
285 | tilcdc_write(dev, LCDC_CTRL_REG, LCDC_CLK_DIVISOR(clkdiv) | | |
286 | LCDC_RASTER_MODE); | |
287 | ||
288 | if (priv->rev == 2) | |
289 | tilcdc_set(dev, LCDC_CLK_ENABLE_REG, | |
290 | LCDC_V2_DMA_CLK_EN | LCDC_V2_LIDD_CLK_EN | | |
291 | LCDC_V2_CORE_CLK_EN); | |
292 | } | |
293 | ||
75d7f277 | 294 | static void tilcdc_crtc_set_mode(struct drm_crtc *crtc) |
f6382f18 JS |
295 | { |
296 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
297 | struct drm_device *dev = crtc->dev; | |
298 | struct tilcdc_drm_private *priv = dev->dev_private; | |
299 | const struct tilcdc_panel_info *info = tilcdc_crtc->info; | |
300 | uint32_t reg, hbp, hfp, hsw, vbp, vfp, vsw; | |
301 | struct drm_display_mode *mode = &crtc->state->adjusted_mode; | |
302 | struct drm_framebuffer *fb = crtc->primary->state->fb; | |
303 | ||
304 | if (WARN_ON(!info)) | |
305 | return; | |
306 | ||
307 | if (WARN_ON(!fb)) | |
308 | return; | |
309 | ||
f6382f18 JS |
310 | /* Configure the Burst Size and fifo threshold of DMA: */ |
311 | reg = tilcdc_read(dev, LCDC_DMA_CTRL_REG) & ~0x00000770; | |
312 | switch (info->dma_burst_sz) { | |
313 | case 1: | |
314 | reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_1); | |
315 | break; | |
316 | case 2: | |
317 | reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_2); | |
318 | break; | |
319 | case 4: | |
320 | reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_4); | |
321 | break; | |
322 | case 8: | |
323 | reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_8); | |
324 | break; | |
325 | case 16: | |
326 | reg |= LCDC_DMA_BURST_SIZE(LCDC_DMA_BURST_16); | |
327 | break; | |
328 | default: | |
329 | dev_err(dev->dev, "invalid burst size\n"); | |
330 | return; | |
331 | } | |
332 | reg |= (info->fifo_th << 8); | |
333 | tilcdc_write(dev, LCDC_DMA_CTRL_REG, reg); | |
334 | ||
335 | /* Configure timings: */ | |
336 | hbp = mode->htotal - mode->hsync_end; | |
337 | hfp = mode->hsync_start - mode->hdisplay; | |
338 | hsw = mode->hsync_end - mode->hsync_start; | |
339 | vbp = mode->vtotal - mode->vsync_end; | |
340 | vfp = mode->vsync_start - mode->vdisplay; | |
341 | vsw = mode->vsync_end - mode->vsync_start; | |
342 | ||
343 | DBG("%dx%d, hbp=%u, hfp=%u, hsw=%u, vbp=%u, vfp=%u, vsw=%u", | |
344 | mode->hdisplay, mode->vdisplay, hbp, hfp, hsw, vbp, vfp, vsw); | |
345 | ||
346 | /* Set AC Bias Period and Number of Transitions per Interrupt: */ | |
347 | reg = tilcdc_read(dev, LCDC_RASTER_TIMING_2_REG) & ~0x000fff00; | |
348 | reg |= LCDC_AC_BIAS_FREQUENCY(info->ac_bias) | | |
349 | LCDC_AC_BIAS_TRANSITIONS_PER_INT(info->ac_bias_intrpt); | |
350 | ||
351 | /* | |
352 | * subtract one from hfp, hbp, hsw because the hardware uses | |
353 | * a value of 0 as 1 | |
354 | */ | |
355 | if (priv->rev == 2) { | |
356 | /* clear bits we're going to set */ | |
357 | reg &= ~0x78000033; | |
358 | reg |= ((hfp-1) & 0x300) >> 8; | |
359 | reg |= ((hbp-1) & 0x300) >> 4; | |
360 | reg |= ((hsw-1) & 0x3c0) << 21; | |
361 | } | |
362 | tilcdc_write(dev, LCDC_RASTER_TIMING_2_REG, reg); | |
363 | ||
364 | reg = (((mode->hdisplay >> 4) - 1) << 4) | | |
365 | (((hbp-1) & 0xff) << 24) | | |
366 | (((hfp-1) & 0xff) << 16) | | |
367 | (((hsw-1) & 0x3f) << 10); | |
368 | if (priv->rev == 2) | |
369 | reg |= (((mode->hdisplay >> 4) - 1) & 0x40) >> 3; | |
370 | tilcdc_write(dev, LCDC_RASTER_TIMING_0_REG, reg); | |
371 | ||
372 | reg = ((mode->vdisplay - 1) & 0x3ff) | | |
373 | ((vbp & 0xff) << 24) | | |
374 | ((vfp & 0xff) << 16) | | |
375 | (((vsw-1) & 0x3f) << 10); | |
376 | tilcdc_write(dev, LCDC_RASTER_TIMING_1_REG, reg); | |
377 | ||
378 | /* | |
379 | * be sure to set Bit 10 for the V2 LCDC controller, | |
380 | * otherwise limited to 1024 pixels width, stopping | |
381 | * 1920x1080 being supported. | |
382 | */ | |
383 | if (priv->rev == 2) { | |
384 | if ((mode->vdisplay - 1) & 0x400) { | |
385 | tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, | |
386 | LCDC_LPP_B10); | |
387 | } else { | |
388 | tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, | |
389 | LCDC_LPP_B10); | |
390 | } | |
391 | } | |
392 | ||
393 | /* Configure display type: */ | |
394 | reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG) & | |
395 | ~(LCDC_TFT_MODE | LCDC_MONO_8BIT_MODE | LCDC_MONOCHROME_MODE | | |
396 | LCDC_V2_TFT_24BPP_MODE | LCDC_V2_TFT_24BPP_UNPACK | | |
397 | 0x000ff000 /* Palette Loading Delay bits */); | |
398 | reg |= LCDC_TFT_MODE; /* no monochrome/passive support */ | |
399 | if (info->tft_alt_mode) | |
400 | reg |= LCDC_TFT_ALT_ENABLE; | |
401 | if (priv->rev == 2) { | |
438b74a5 | 402 | switch (fb->format->format) { |
59f11a43 LP |
403 | case DRM_FORMAT_BGR565: |
404 | case DRM_FORMAT_RGB565: | |
f6382f18 | 405 | break; |
59f11a43 LP |
406 | case DRM_FORMAT_XBGR8888: |
407 | case DRM_FORMAT_XRGB8888: | |
f6382f18 JS |
408 | reg |= LCDC_V2_TFT_24BPP_UNPACK; |
409 | /* fallthrough */ | |
59f11a43 LP |
410 | case DRM_FORMAT_BGR888: |
411 | case DRM_FORMAT_RGB888: | |
f6382f18 JS |
412 | reg |= LCDC_V2_TFT_24BPP_MODE; |
413 | break; | |
414 | default: | |
415 | dev_err(dev->dev, "invalid pixel format\n"); | |
416 | return; | |
417 | } | |
418 | } | |
419 | reg |= info->fdd < 12; | |
420 | tilcdc_write(dev, LCDC_RASTER_CTRL_REG, reg); | |
421 | ||
422 | if (info->invert_pxl_clk) | |
423 | tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_PIXEL_CLOCK); | |
424 | else | |
425 | tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_PIXEL_CLOCK); | |
426 | ||
427 | if (info->sync_ctrl) | |
428 | tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_CTRL); | |
429 | else | |
430 | tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_CTRL); | |
431 | ||
432 | if (info->sync_edge) | |
433 | tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_EDGE); | |
434 | else | |
435 | tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_SYNC_EDGE); | |
436 | ||
437 | if (mode->flags & DRM_MODE_FLAG_NHSYNC) | |
438 | tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_HSYNC); | |
439 | else | |
440 | tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_HSYNC); | |
441 | ||
442 | if (mode->flags & DRM_MODE_FLAG_NVSYNC) | |
443 | tilcdc_set(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_VSYNC); | |
444 | else | |
445 | tilcdc_clear(dev, LCDC_RASTER_TIMING_2_REG, LCDC_INVERT_VSYNC); | |
446 | ||
447 | if (info->raster_order) | |
448 | tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ORDER); | |
449 | else | |
450 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ORDER); | |
451 | ||
642e5167 | 452 | tilcdc_crtc_set_clk(crtc); |
f6382f18 | 453 | |
274c34db JS |
454 | tilcdc_crtc_load_palette(crtc); |
455 | ||
456 | set_scanout(crtc, fb); | |
457 | ||
75d7f277 JS |
458 | drm_framebuffer_reference(fb); |
459 | ||
f6382f18 JS |
460 | crtc->hwmode = crtc->state->adjusted_mode; |
461 | } | |
462 | ||
75d7f277 JS |
463 | static void tilcdc_crtc_enable(struct drm_crtc *crtc) |
464 | { | |
465 | struct drm_device *dev = crtc->dev; | |
466 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
11abbc9f | 467 | unsigned long flags; |
75d7f277 JS |
468 | |
469 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); | |
470 | mutex_lock(&tilcdc_crtc->enable_lock); | |
471 | if (tilcdc_crtc->enabled || tilcdc_crtc->shutdown) { | |
472 | mutex_unlock(&tilcdc_crtc->enable_lock); | |
473 | return; | |
474 | } | |
475 | ||
476 | pm_runtime_get_sync(dev->dev); | |
477 | ||
478 | reset(crtc); | |
479 | ||
480 | tilcdc_crtc_set_mode(crtc); | |
481 | ||
482 | tilcdc_crtc_enable_irqs(dev); | |
483 | ||
484 | tilcdc_clear(dev, LCDC_DMA_CTRL_REG, LCDC_DUAL_FRAME_BUFFER_ENABLE); | |
485 | tilcdc_write_mask(dev, LCDC_RASTER_CTRL_REG, | |
486 | LCDC_PALETTE_LOAD_MODE(DATA_ONLY), | |
487 | LCDC_PALETTE_LOAD_MODE_MASK); | |
11abbc9f JS |
488 | |
489 | /* There is no real chance for a race here as the time stamp | |
490 | * is taken before the raster DMA is started. The spin-lock is | |
491 | * taken to have a memory barrier after taking the time-stamp | |
492 | * and to avoid a context switch between taking the stamp and | |
493 | * enabling the raster. | |
494 | */ | |
495 | spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags); | |
496 | tilcdc_crtc->last_vblank = ktime_get(); | |
75d7f277 | 497 | tilcdc_set(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE); |
11abbc9f | 498 | spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags); |
75d7f277 JS |
499 | |
500 | drm_crtc_vblank_on(crtc); | |
501 | ||
502 | tilcdc_crtc->enabled = true; | |
503 | mutex_unlock(&tilcdc_crtc->enable_lock); | |
504 | } | |
505 | ||
506 | static void tilcdc_crtc_off(struct drm_crtc *crtc, bool shutdown) | |
507 | { | |
508 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
509 | struct drm_device *dev = crtc->dev; | |
510 | struct tilcdc_drm_private *priv = dev->dev_private; | |
511 | int ret; | |
512 | ||
513 | mutex_lock(&tilcdc_crtc->enable_lock); | |
514 | if (shutdown) | |
515 | tilcdc_crtc->shutdown = true; | |
516 | if (!tilcdc_crtc->enabled) { | |
517 | mutex_unlock(&tilcdc_crtc->enable_lock); | |
518 | return; | |
519 | } | |
520 | tilcdc_crtc->frame_done = false; | |
521 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, LCDC_RASTER_ENABLE); | |
522 | ||
523 | /* | |
524 | * Wait for framedone irq which will still come before putting | |
525 | * things to sleep.. | |
526 | */ | |
527 | ret = wait_event_timeout(tilcdc_crtc->frame_done_wq, | |
528 | tilcdc_crtc->frame_done, | |
529 | msecs_to_jiffies(500)); | |
530 | if (ret == 0) | |
531 | dev_err(dev->dev, "%s: timeout waiting for framedone\n", | |
532 | __func__); | |
533 | ||
534 | drm_crtc_vblank_off(crtc); | |
535 | ||
536 | tilcdc_crtc_disable_irqs(dev); | |
537 | ||
538 | pm_runtime_put_sync(dev->dev); | |
539 | ||
540 | if (tilcdc_crtc->next_fb) { | |
541 | drm_flip_work_queue(&tilcdc_crtc->unref_work, | |
542 | tilcdc_crtc->next_fb); | |
543 | tilcdc_crtc->next_fb = NULL; | |
544 | } | |
545 | ||
546 | if (tilcdc_crtc->curr_fb) { | |
547 | drm_flip_work_queue(&tilcdc_crtc->unref_work, | |
548 | tilcdc_crtc->curr_fb); | |
549 | tilcdc_crtc->curr_fb = NULL; | |
550 | } | |
551 | ||
552 | drm_flip_work_commit(&tilcdc_crtc->unref_work, priv->wq); | |
75d7f277 JS |
553 | |
554 | tilcdc_crtc->enabled = false; | |
555 | mutex_unlock(&tilcdc_crtc->enable_lock); | |
556 | } | |
557 | ||
558 | static void tilcdc_crtc_disable(struct drm_crtc *crtc) | |
559 | { | |
560 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); | |
561 | tilcdc_crtc_off(crtc, false); | |
562 | } | |
563 | ||
564 | void tilcdc_crtc_shutdown(struct drm_crtc *crtc) | |
565 | { | |
566 | tilcdc_crtc_off(crtc, true); | |
567 | } | |
568 | ||
569 | static bool tilcdc_crtc_is_on(struct drm_crtc *crtc) | |
570 | { | |
571 | return crtc->state && crtc->state->enable && crtc->state->active; | |
572 | } | |
573 | ||
574 | static void tilcdc_crtc_recover_work(struct work_struct *work) | |
575 | { | |
576 | struct tilcdc_crtc *tilcdc_crtc = | |
577 | container_of(work, struct tilcdc_crtc, recover_work); | |
578 | struct drm_crtc *crtc = &tilcdc_crtc->base; | |
579 | ||
580 | dev_info(crtc->dev->dev, "%s: Reset CRTC", __func__); | |
581 | ||
582 | drm_modeset_lock_crtc(crtc, NULL); | |
583 | ||
584 | if (!tilcdc_crtc_is_on(crtc)) | |
585 | goto out; | |
586 | ||
587 | tilcdc_crtc_disable(crtc); | |
588 | tilcdc_crtc_enable(crtc); | |
589 | out: | |
590 | drm_modeset_unlock_crtc(crtc); | |
591 | } | |
592 | ||
593 | static void tilcdc_crtc_destroy(struct drm_crtc *crtc) | |
594 | { | |
595 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
596 | struct tilcdc_drm_private *priv = crtc->dev->dev_private; | |
597 | ||
598 | drm_modeset_lock_crtc(crtc, NULL); | |
599 | tilcdc_crtc_disable(crtc); | |
600 | drm_modeset_unlock_crtc(crtc); | |
601 | ||
602 | flush_workqueue(priv->wq); | |
603 | ||
604 | of_node_put(crtc->port); | |
605 | drm_crtc_cleanup(crtc); | |
606 | drm_flip_work_cleanup(&tilcdc_crtc->unref_work); | |
607 | } | |
608 | ||
609 | int tilcdc_crtc_update_fb(struct drm_crtc *crtc, | |
610 | struct drm_framebuffer *fb, | |
611 | struct drm_pending_vblank_event *event) | |
612 | { | |
613 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
614 | struct drm_device *dev = crtc->dev; | |
75d7f277 JS |
615 | |
616 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); | |
617 | ||
618 | if (tilcdc_crtc->event) { | |
619 | dev_err(dev->dev, "already pending page flip!\n"); | |
620 | return -EBUSY; | |
621 | } | |
622 | ||
623 | drm_framebuffer_reference(fb); | |
624 | ||
625 | crtc->primary->fb = fb; | |
11abbc9f | 626 | tilcdc_crtc->event = event; |
75d7f277 | 627 | |
11abbc9f | 628 | mutex_lock(&tilcdc_crtc->enable_lock); |
75d7f277 | 629 | |
11abbc9f JS |
630 | if (tilcdc_crtc->enabled) { |
631 | unsigned long flags; | |
75d7f277 JS |
632 | ktime_t next_vblank; |
633 | s64 tdiff; | |
634 | ||
11abbc9f | 635 | spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags); |
75d7f277 | 636 | |
11abbc9f JS |
637 | next_vblank = ktime_add_us(tilcdc_crtc->last_vblank, |
638 | 1000000 / crtc->hwmode.vrefresh); | |
75d7f277 JS |
639 | tdiff = ktime_to_us(ktime_sub(next_vblank, ktime_get())); |
640 | ||
641 | if (tdiff < TILCDC_VBLANK_SAFETY_THRESHOLD_US) | |
642 | tilcdc_crtc->next_fb = fb; | |
11abbc9f JS |
643 | else |
644 | set_scanout(crtc, fb); | |
75d7f277 | 645 | |
11abbc9f JS |
646 | spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags); |
647 | } | |
75d7f277 | 648 | |
11abbc9f | 649 | mutex_unlock(&tilcdc_crtc->enable_lock); |
75d7f277 JS |
650 | |
651 | return 0; | |
652 | } | |
653 | ||
654 | static bool tilcdc_crtc_mode_fixup(struct drm_crtc *crtc, | |
655 | const struct drm_display_mode *mode, | |
656 | struct drm_display_mode *adjusted_mode) | |
657 | { | |
658 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
659 | ||
660 | if (!tilcdc_crtc->simulate_vesa_sync) | |
661 | return true; | |
662 | ||
663 | /* | |
664 | * tilcdc does not generate VESA-compliant sync but aligns | |
665 | * VS on the second edge of HS instead of first edge. | |
666 | * We use adjusted_mode, to fixup sync by aligning both rising | |
667 | * edges and add HSKEW offset to fix the sync. | |
668 | */ | |
669 | adjusted_mode->hskew = mode->hsync_end - mode->hsync_start; | |
670 | adjusted_mode->flags |= DRM_MODE_FLAG_HSKEW; | |
671 | ||
672 | if (mode->flags & DRM_MODE_FLAG_NHSYNC) { | |
673 | adjusted_mode->flags |= DRM_MODE_FLAG_PHSYNC; | |
674 | adjusted_mode->flags &= ~DRM_MODE_FLAG_NHSYNC; | |
675 | } else { | |
676 | adjusted_mode->flags |= DRM_MODE_FLAG_NHSYNC; | |
677 | adjusted_mode->flags &= ~DRM_MODE_FLAG_PHSYNC; | |
678 | } | |
679 | ||
680 | return true; | |
681 | } | |
682 | ||
db380c58 JS |
683 | static int tilcdc_crtc_atomic_check(struct drm_crtc *crtc, |
684 | struct drm_crtc_state *state) | |
685 | { | |
686 | struct drm_display_mode *mode = &state->mode; | |
687 | int ret; | |
688 | ||
689 | /* If we are not active we don't care */ | |
690 | if (!state->active) | |
691 | return 0; | |
692 | ||
693 | if (state->state->planes[0].ptr != crtc->primary || | |
694 | state->state->planes[0].state == NULL || | |
695 | state->state->planes[0].state->crtc != crtc) { | |
696 | dev_dbg(crtc->dev->dev, "CRTC primary plane must be present"); | |
697 | return -EINVAL; | |
698 | } | |
699 | ||
700 | ret = tilcdc_crtc_mode_valid(crtc, mode); | |
701 | if (ret) { | |
702 | dev_dbg(crtc->dev->dev, "Mode \"%s\" not valid", mode->name); | |
703 | return -EINVAL; | |
704 | } | |
705 | ||
706 | return 0; | |
707 | } | |
708 | ||
16ea975e | 709 | static const struct drm_crtc_funcs tilcdc_crtc_funcs = { |
305198de JS |
710 | .destroy = tilcdc_crtc_destroy, |
711 | .set_config = drm_atomic_helper_set_config, | |
712 | .page_flip = drm_atomic_helper_page_flip, | |
713 | .reset = drm_atomic_helper_crtc_reset, | |
714 | .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, | |
715 | .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, | |
16ea975e RC |
716 | }; |
717 | ||
718 | static const struct drm_crtc_helper_funcs tilcdc_crtc_helper_funcs = { | |
16ea975e | 719 | .mode_fixup = tilcdc_crtc_mode_fixup, |
305198de JS |
720 | .enable = tilcdc_crtc_enable, |
721 | .disable = tilcdc_crtc_disable, | |
db380c58 | 722 | .atomic_check = tilcdc_crtc_atomic_check, |
16ea975e RC |
723 | }; |
724 | ||
725 | int tilcdc_crtc_max_width(struct drm_crtc *crtc) | |
726 | { | |
727 | struct drm_device *dev = crtc->dev; | |
728 | struct tilcdc_drm_private *priv = dev->dev_private; | |
729 | int max_width = 0; | |
730 | ||
731 | if (priv->rev == 1) | |
732 | max_width = 1024; | |
733 | else if (priv->rev == 2) | |
734 | max_width = 2048; | |
735 | ||
736 | return max_width; | |
737 | } | |
738 | ||
739 | int tilcdc_crtc_mode_valid(struct drm_crtc *crtc, struct drm_display_mode *mode) | |
740 | { | |
741 | struct tilcdc_drm_private *priv = crtc->dev->dev_private; | |
742 | unsigned int bandwidth; | |
e1c5d0a8 | 743 | uint32_t hbp, hfp, hsw, vbp, vfp, vsw; |
16ea975e | 744 | |
e1c5d0a8 DE |
745 | /* |
746 | * check to see if the width is within the range that | |
747 | * the LCD Controller physically supports | |
748 | */ | |
16ea975e RC |
749 | if (mode->hdisplay > tilcdc_crtc_max_width(crtc)) |
750 | return MODE_VIRTUAL_X; | |
751 | ||
752 | /* width must be multiple of 16 */ | |
753 | if (mode->hdisplay & 0xf) | |
754 | return MODE_VIRTUAL_X; | |
755 | ||
756 | if (mode->vdisplay > 2048) | |
757 | return MODE_VIRTUAL_Y; | |
758 | ||
e1c5d0a8 DE |
759 | DBG("Processing mode %dx%d@%d with pixel clock %d", |
760 | mode->hdisplay, mode->vdisplay, | |
761 | drm_mode_vrefresh(mode), mode->clock); | |
762 | ||
763 | hbp = mode->htotal - mode->hsync_end; | |
764 | hfp = mode->hsync_start - mode->hdisplay; | |
765 | hsw = mode->hsync_end - mode->hsync_start; | |
766 | vbp = mode->vtotal - mode->vsync_end; | |
767 | vfp = mode->vsync_start - mode->vdisplay; | |
768 | vsw = mode->vsync_end - mode->vsync_start; | |
769 | ||
770 | if ((hbp-1) & ~0x3ff) { | |
771 | DBG("Pruning mode: Horizontal Back Porch out of range"); | |
772 | return MODE_HBLANK_WIDE; | |
773 | } | |
774 | ||
775 | if ((hfp-1) & ~0x3ff) { | |
776 | DBG("Pruning mode: Horizontal Front Porch out of range"); | |
777 | return MODE_HBLANK_WIDE; | |
778 | } | |
779 | ||
780 | if ((hsw-1) & ~0x3ff) { | |
781 | DBG("Pruning mode: Horizontal Sync Width out of range"); | |
782 | return MODE_HSYNC_WIDE; | |
783 | } | |
784 | ||
785 | if (vbp & ~0xff) { | |
786 | DBG("Pruning mode: Vertical Back Porch out of range"); | |
787 | return MODE_VBLANK_WIDE; | |
788 | } | |
789 | ||
790 | if (vfp & ~0xff) { | |
791 | DBG("Pruning mode: Vertical Front Porch out of range"); | |
792 | return MODE_VBLANK_WIDE; | |
793 | } | |
794 | ||
795 | if ((vsw-1) & ~0x3f) { | |
796 | DBG("Pruning mode: Vertical Sync Width out of range"); | |
797 | return MODE_VSYNC_WIDE; | |
798 | } | |
799 | ||
4e564346 DE |
800 | /* |
801 | * some devices have a maximum allowed pixel clock | |
802 | * configured from the DT | |
803 | */ | |
804 | if (mode->clock > priv->max_pixelclock) { | |
f7b45756 | 805 | DBG("Pruning mode: pixel clock too high"); |
4e564346 DE |
806 | return MODE_CLOCK_HIGH; |
807 | } | |
808 | ||
809 | /* | |
810 | * some devices further limit the max horizontal resolution | |
811 | * configured from the DT | |
812 | */ | |
813 | if (mode->hdisplay > priv->max_width) | |
814 | return MODE_BAD_WIDTH; | |
815 | ||
16ea975e | 816 | /* filter out modes that would require too much memory bandwidth: */ |
4e564346 DE |
817 | bandwidth = mode->hdisplay * mode->vdisplay * |
818 | drm_mode_vrefresh(mode); | |
819 | if (bandwidth > priv->max_bandwidth) { | |
f7b45756 | 820 | DBG("Pruning mode: exceeds defined bandwidth limit"); |
16ea975e | 821 | return MODE_BAD; |
4e564346 | 822 | } |
16ea975e RC |
823 | |
824 | return MODE_OK; | |
825 | } | |
826 | ||
827 | void tilcdc_crtc_set_panel_info(struct drm_crtc *crtc, | |
828 | const struct tilcdc_panel_info *info) | |
829 | { | |
830 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
831 | tilcdc_crtc->info = info; | |
832 | } | |
833 | ||
103cd8bc JS |
834 | void tilcdc_crtc_set_simulate_vesa_sync(struct drm_crtc *crtc, |
835 | bool simulate_vesa_sync) | |
836 | { | |
837 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
838 | ||
839 | tilcdc_crtc->simulate_vesa_sync = simulate_vesa_sync; | |
840 | } | |
841 | ||
16ea975e RC |
842 | void tilcdc_crtc_update_clk(struct drm_crtc *crtc) |
843 | { | |
16ea975e RC |
844 | struct drm_device *dev = crtc->dev; |
845 | struct tilcdc_drm_private *priv = dev->dev_private; | |
642e5167 | 846 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); |
16ea975e | 847 | |
642e5167 JS |
848 | drm_modeset_lock_crtc(crtc, NULL); |
849 | if (tilcdc_crtc->lcd_fck_rate != clk_get_rate(priv->clk)) { | |
850 | if (tilcdc_crtc_is_on(crtc)) { | |
851 | pm_runtime_get_sync(dev->dev); | |
852 | tilcdc_crtc_disable(crtc); | |
16ea975e | 853 | |
642e5167 | 854 | tilcdc_crtc_set_clk(crtc); |
16ea975e | 855 | |
642e5167 JS |
856 | tilcdc_crtc_enable(crtc); |
857 | pm_runtime_put_sync(dev->dev); | |
858 | } | |
16ea975e | 859 | } |
642e5167 | 860 | drm_modeset_unlock_crtc(crtc); |
16ea975e RC |
861 | } |
862 | ||
5895d08f JS |
863 | #define SYNC_LOST_COUNT_LIMIT 50 |
864 | ||
16ea975e RC |
865 | irqreturn_t tilcdc_crtc_irq(struct drm_crtc *crtc) |
866 | { | |
867 | struct tilcdc_crtc *tilcdc_crtc = to_tilcdc_crtc(crtc); | |
868 | struct drm_device *dev = crtc->dev; | |
869 | struct tilcdc_drm_private *priv = dev->dev_private; | |
f97fd383 | 870 | uint32_t stat, reg; |
16ea975e | 871 | |
317aae73 TV |
872 | stat = tilcdc_read_irqstatus(dev); |
873 | tilcdc_clear_irqstatus(dev, stat); | |
874 | ||
2b2080d7 | 875 | if (stat & LCDC_END_OF_FRAME0) { |
16ea975e | 876 | unsigned long flags; |
2b3a8cd7 TV |
877 | bool skip_event = false; |
878 | ktime_t now; | |
879 | ||
880 | now = ktime_get(); | |
16ea975e | 881 | |
2b2080d7 | 882 | drm_flip_work_commit(&tilcdc_crtc->unref_work, priv->wq); |
16ea975e | 883 | |
2b3a8cd7 TV |
884 | spin_lock_irqsave(&tilcdc_crtc->irq_lock, flags); |
885 | ||
886 | tilcdc_crtc->last_vblank = now; | |
887 | ||
888 | if (tilcdc_crtc->next_fb) { | |
889 | set_scanout(crtc, tilcdc_crtc->next_fb); | |
890 | tilcdc_crtc->next_fb = NULL; | |
891 | skip_event = true; | |
892 | } | |
893 | ||
894 | spin_unlock_irqrestore(&tilcdc_crtc->irq_lock, flags); | |
895 | ||
099ede83 | 896 | drm_crtc_handle_vblank(crtc); |
16ea975e | 897 | |
2b3a8cd7 TV |
898 | if (!skip_event) { |
899 | struct drm_pending_vblank_event *event; | |
16ea975e | 900 | |
2b3a8cd7 TV |
901 | spin_lock_irqsave(&dev->event_lock, flags); |
902 | ||
903 | event = tilcdc_crtc->event; | |
2b2080d7 | 904 | tilcdc_crtc->event = NULL; |
2b3a8cd7 | 905 | if (event) |
dfebc152 | 906 | drm_crtc_send_vblank_event(crtc, event); |
2b2080d7 | 907 | |
2b3a8cd7 TV |
908 | spin_unlock_irqrestore(&dev->event_lock, flags); |
909 | } | |
5895d08f JS |
910 | |
911 | if (tilcdc_crtc->frame_intact) | |
912 | tilcdc_crtc->sync_lost_count = 0; | |
913 | else | |
914 | tilcdc_crtc->frame_intact = true; | |
16ea975e RC |
915 | } |
916 | ||
14944113 | 917 | if (stat & LCDC_FIFO_UNDERFLOW) |
d701453b | 918 | dev_err_ratelimited(dev->dev, "%s(0x%08x): FIFO underflow", |
14944113 JS |
919 | __func__, stat); |
920 | ||
55e165c4 JS |
921 | if (stat & LCDC_PL_LOAD_DONE) { |
922 | complete(&tilcdc_crtc->palette_loaded); | |
923 | if (priv->rev == 1) | |
924 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, | |
925 | LCDC_V1_PL_INT_ENA); | |
926 | else | |
927 | tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, | |
928 | LCDC_V2_PL_INT_ENA); | |
9345235e BG |
929 | } |
930 | ||
cba8844a JS |
931 | if (stat & LCDC_SYNC_LOST) { |
932 | dev_err_ratelimited(dev->dev, "%s(0x%08x): Sync lost", | |
933 | __func__, stat); | |
934 | tilcdc_crtc->frame_intact = false; | |
f97fd383 BG |
935 | if (priv->rev == 1) { |
936 | reg = tilcdc_read(dev, LCDC_RASTER_CTRL_REG); | |
937 | if (reg & LCDC_RASTER_ENABLE) { | |
cba8844a | 938 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, |
f97fd383 BG |
939 | LCDC_RASTER_ENABLE); |
940 | tilcdc_set(dev, LCDC_RASTER_CTRL_REG, | |
941 | LCDC_RASTER_ENABLE); | |
942 | } | |
943 | } else { | |
944 | if (tilcdc_crtc->sync_lost_count++ > | |
945 | SYNC_LOST_COUNT_LIMIT) { | |
946 | dev_err(dev->dev, | |
947 | "%s(0x%08x): Sync lost flood detected, recovering", | |
948 | __func__, stat); | |
949 | queue_work(system_wq, | |
950 | &tilcdc_crtc->recover_work); | |
cba8844a JS |
951 | tilcdc_write(dev, LCDC_INT_ENABLE_CLR_REG, |
952 | LCDC_SYNC_LOST); | |
f97fd383 BG |
953 | tilcdc_crtc->sync_lost_count = 0; |
954 | } | |
cba8844a JS |
955 | } |
956 | } | |
957 | ||
3672583f JS |
958 | if (stat & LCDC_FRAME_DONE) { |
959 | tilcdc_crtc->frame_done = true; | |
960 | wake_up(&tilcdc_crtc->frame_done_wq); | |
961 | /* rev 1 lcdc appears to hang if irq is not disbaled here */ | |
962 | if (priv->rev == 1) | |
963 | tilcdc_clear(dev, LCDC_RASTER_CTRL_REG, | |
964 | LCDC_V1_FRAME_DONE_INT_ENA); | |
965 | } | |
966 | ||
14944113 | 967 | /* For revision 2 only */ |
16ea975e | 968 | if (priv->rev == 2) { |
14944113 JS |
969 | /* Indicate to LCDC that the interrupt service routine has |
970 | * completed, see 13.3.6.1.6 in AM335x TRM. | |
971 | */ | |
972 | tilcdc_write(dev, LCDC_END_OF_INT_IND_REG, 0); | |
973 | } | |
c0c2baaa | 974 | |
16ea975e RC |
975 | return IRQ_HANDLED; |
976 | } | |
977 | ||
9963d36d | 978 | int tilcdc_crtc_create(struct drm_device *dev) |
16ea975e | 979 | { |
d66284fb | 980 | struct tilcdc_drm_private *priv = dev->dev_private; |
16ea975e RC |
981 | struct tilcdc_crtc *tilcdc_crtc; |
982 | struct drm_crtc *crtc; | |
983 | int ret; | |
984 | ||
d0ec32ca | 985 | tilcdc_crtc = devm_kzalloc(dev->dev, sizeof(*tilcdc_crtc), GFP_KERNEL); |
16ea975e RC |
986 | if (!tilcdc_crtc) { |
987 | dev_err(dev->dev, "allocation failed\n"); | |
9963d36d | 988 | return -ENOMEM; |
16ea975e RC |
989 | } |
990 | ||
55e165c4 JS |
991 | init_completion(&tilcdc_crtc->palette_loaded); |
992 | tilcdc_crtc->palette_base = dmam_alloc_coherent(dev->dev, | |
993 | TILCDC_PALETTE_SIZE, | |
9345235e BG |
994 | &tilcdc_crtc->palette_dma_handle, |
995 | GFP_KERNEL | __GFP_ZERO); | |
55e165c4 JS |
996 | if (!tilcdc_crtc->palette_base) |
997 | return -ENOMEM; | |
998 | *tilcdc_crtc->palette_base = TILCDC_PALETTE_FIRST_ENTRY; | |
9345235e | 999 | |
16ea975e RC |
1000 | crtc = &tilcdc_crtc->base; |
1001 | ||
47f571c6 JS |
1002 | ret = tilcdc_plane_init(dev, &tilcdc_crtc->primary); |
1003 | if (ret < 0) | |
1004 | goto fail; | |
1005 | ||
2d53a180 JS |
1006 | mutex_init(&tilcdc_crtc->enable_lock); |
1007 | ||
16ea975e RC |
1008 | init_waitqueue_head(&tilcdc_crtc->frame_done_wq); |
1009 | ||
d7f8db53 | 1010 | drm_flip_work_init(&tilcdc_crtc->unref_work, |
a464d618 | 1011 | "unref", unref_worker); |
16ea975e | 1012 | |
2b3a8cd7 | 1013 | spin_lock_init(&tilcdc_crtc->irq_lock); |
13b3d727 | 1014 | INIT_WORK(&tilcdc_crtc->recover_work, tilcdc_crtc_recover_work); |
2b3a8cd7 | 1015 | |
47f571c6 JS |
1016 | ret = drm_crtc_init_with_planes(dev, crtc, |
1017 | &tilcdc_crtc->primary, | |
1018 | NULL, | |
1019 | &tilcdc_crtc_funcs, | |
1020 | "tilcdc crtc"); | |
16ea975e RC |
1021 | if (ret < 0) |
1022 | goto fail; | |
1023 | ||
1024 | drm_crtc_helper_add(crtc, &tilcdc_crtc_helper_funcs); | |
1025 | ||
d66284fb JS |
1026 | if (priv->is_componentized) { |
1027 | struct device_node *ports = | |
1028 | of_get_child_by_name(dev->dev->of_node, "ports"); | |
1029 | ||
1030 | if (ports) { | |
1031 | crtc->port = of_get_child_by_name(ports, "port"); | |
1032 | of_node_put(ports); | |
1033 | } else { | |
1034 | crtc->port = | |
1035 | of_get_child_by_name(dev->dev->of_node, "port"); | |
1036 | } | |
1037 | if (!crtc->port) { /* This should never happen */ | |
1038 | dev_err(dev->dev, "Port node not found in %s\n", | |
1039 | dev->dev->of_node->full_name); | |
9963d36d | 1040 | ret = -EINVAL; |
d66284fb JS |
1041 | goto fail; |
1042 | } | |
1043 | } | |
1044 | ||
9963d36d JS |
1045 | priv->crtc = crtc; |
1046 | return 0; | |
16ea975e RC |
1047 | |
1048 | fail: | |
1049 | tilcdc_crtc_destroy(crtc); | |
abf8315f | 1050 | return ret; |
16ea975e | 1051 | } |