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1c248b7d ID |
1 | /* exynos_drm_fimd.c |
2 | * | |
3 | * Copyright (C) 2011 Samsung Electronics Co.Ltd | |
4 | * Authors: | |
5 | * Joonyoung Shim <jy0922.shim@samsung.com> | |
6 | * Inki Dae <inki.dae@samsung.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | #include "drmP.h" | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/platform_device.h> | |
19 | #include <linux/clk.h> | |
20 | ||
21 | #include <drm/exynos_drm.h> | |
22 | #include <plat/regs-fb-v4.h> | |
23 | ||
24 | #include "exynos_drm_drv.h" | |
25 | #include "exynos_drm_fbdev.h" | |
26 | #include "exynos_drm_crtc.h" | |
27 | ||
28 | /* | |
29 | * FIMD is stand for Fully Interactive Mobile Display and | |
30 | * as a display controller, it transfers contents drawn on memory | |
31 | * to a LCD Panel through Display Interfaces such as RGB or | |
32 | * CPU Interface. | |
33 | */ | |
34 | ||
35 | /* position control register for hardware window 0, 2 ~ 4.*/ | |
36 | #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16) | |
37 | #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16) | |
38 | /* size control register for hardware window 0. */ | |
39 | #define VIDOSD_C_SIZE_W0 (VIDOSD_BASE + 0x08) | |
40 | /* alpha control register for hardware window 1 ~ 4. */ | |
41 | #define VIDOSD_C(win) (VIDOSD_BASE + 0x18 + (win) * 16) | |
42 | /* size control register for hardware window 1 ~ 4. */ | |
43 | #define VIDOSD_D(win) (VIDOSD_BASE + 0x0C + (win) * 16) | |
44 | ||
45 | #define VIDWx_BUF_START(win, buf) (VIDW_BUF_START(buf) + (win) * 8) | |
46 | #define VIDWx_BUF_END(win, buf) (VIDW_BUF_END(buf) + (win) * 8) | |
47 | #define VIDWx_BUF_SIZE(win, buf) (VIDW_BUF_SIZE(buf) + (win) * 4) | |
48 | ||
49 | /* color key control register for hardware window 1 ~ 4. */ | |
50 | #define WKEYCON0_BASE(x) ((WKEYCON0 + 0x140) + (x * 8)) | |
51 | /* color key value register for hardware window 1 ~ 4. */ | |
52 | #define WKEYCON1_BASE(x) ((WKEYCON1 + 0x140) + (x * 8)) | |
53 | ||
54 | /* FIMD has totally five hardware windows. */ | |
55 | #define WINDOWS_NR 5 | |
56 | ||
57 | #define get_fimd_context(dev) platform_get_drvdata(to_platform_device(dev)) | |
58 | ||
59 | struct fimd_win_data { | |
60 | unsigned int offset_x; | |
61 | unsigned int offset_y; | |
19c8b834 ID |
62 | unsigned int ovl_width; |
63 | unsigned int ovl_height; | |
64 | unsigned int fb_width; | |
65 | unsigned int fb_height; | |
1c248b7d ID |
66 | unsigned int bpp; |
67 | dma_addr_t paddr; | |
68 | void __iomem *vaddr; | |
69 | unsigned int buf_offsize; | |
70 | unsigned int line_size; /* bytes */ | |
71 | }; | |
72 | ||
73 | struct fimd_context { | |
74 | struct exynos_drm_subdrv subdrv; | |
75 | int irq; | |
76 | struct drm_crtc *crtc; | |
77 | struct clk *bus_clk; | |
78 | struct clk *lcd_clk; | |
79 | struct resource *regs_res; | |
80 | void __iomem *regs; | |
81 | struct fimd_win_data win_data[WINDOWS_NR]; | |
82 | unsigned int clkdiv; | |
83 | unsigned int default_win; | |
84 | unsigned long irq_flags; | |
85 | u32 vidcon0; | |
86 | u32 vidcon1; | |
87 | ||
88 | struct fb_videomode *timing; | |
89 | }; | |
90 | ||
91 | static bool fimd_display_is_connected(struct device *dev) | |
92 | { | |
1c248b7d ID |
93 | DRM_DEBUG_KMS("%s\n", __FILE__); |
94 | ||
95 | /* TODO. */ | |
96 | ||
97 | return true; | |
98 | } | |
99 | ||
100 | static void *fimd_get_timing(struct device *dev) | |
101 | { | |
102 | struct fimd_context *ctx = get_fimd_context(dev); | |
103 | ||
104 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
105 | ||
106 | return ctx->timing; | |
107 | } | |
108 | ||
109 | static int fimd_check_timing(struct device *dev, void *timing) | |
110 | { | |
1c248b7d ID |
111 | DRM_DEBUG_KMS("%s\n", __FILE__); |
112 | ||
113 | /* TODO. */ | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static int fimd_display_power_on(struct device *dev, int mode) | |
119 | { | |
1c248b7d ID |
120 | DRM_DEBUG_KMS("%s\n", __FILE__); |
121 | ||
122 | /* TODO. */ | |
123 | ||
124 | return 0; | |
125 | } | |
126 | ||
74ccc539 | 127 | static struct exynos_drm_display_ops fimd_display_ops = { |
1c248b7d ID |
128 | .type = EXYNOS_DISPLAY_TYPE_LCD, |
129 | .is_connected = fimd_display_is_connected, | |
130 | .get_timing = fimd_get_timing, | |
131 | .check_timing = fimd_check_timing, | |
132 | .power_on = fimd_display_power_on, | |
133 | }; | |
134 | ||
135 | static void fimd_commit(struct device *dev) | |
136 | { | |
137 | struct fimd_context *ctx = get_fimd_context(dev); | |
138 | struct fb_videomode *timing = ctx->timing; | |
139 | u32 val; | |
140 | ||
141 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
142 | ||
143 | /* setup polarity values from machine code. */ | |
144 | writel(ctx->vidcon1, ctx->regs + VIDCON1); | |
145 | ||
146 | /* setup vertical timing values. */ | |
147 | val = VIDTCON0_VBPD(timing->upper_margin - 1) | | |
148 | VIDTCON0_VFPD(timing->lower_margin - 1) | | |
149 | VIDTCON0_VSPW(timing->vsync_len - 1); | |
150 | writel(val, ctx->regs + VIDTCON0); | |
151 | ||
152 | /* setup horizontal timing values. */ | |
153 | val = VIDTCON1_HBPD(timing->left_margin - 1) | | |
154 | VIDTCON1_HFPD(timing->right_margin - 1) | | |
155 | VIDTCON1_HSPW(timing->hsync_len - 1); | |
156 | writel(val, ctx->regs + VIDTCON1); | |
157 | ||
158 | /* setup horizontal and vertical display size. */ | |
159 | val = VIDTCON2_LINEVAL(timing->yres - 1) | | |
160 | VIDTCON2_HOZVAL(timing->xres - 1); | |
161 | writel(val, ctx->regs + VIDTCON2); | |
162 | ||
163 | /* setup clock source, clock divider, enable dma. */ | |
164 | val = ctx->vidcon0; | |
165 | val &= ~(VIDCON0_CLKVAL_F_MASK | VIDCON0_CLKDIR); | |
166 | ||
167 | if (ctx->clkdiv > 1) | |
168 | val |= VIDCON0_CLKVAL_F(ctx->clkdiv - 1) | VIDCON0_CLKDIR; | |
169 | else | |
170 | val &= ~VIDCON0_CLKDIR; /* 1:1 clock */ | |
171 | ||
172 | /* | |
173 | * fields of register with prefix '_F' would be updated | |
174 | * at vsync(same as dma start) | |
175 | */ | |
176 | val |= VIDCON0_ENVID | VIDCON0_ENVID_F; | |
177 | writel(val, ctx->regs + VIDCON0); | |
178 | } | |
179 | ||
180 | static int fimd_enable_vblank(struct device *dev) | |
181 | { | |
182 | struct fimd_context *ctx = get_fimd_context(dev); | |
183 | u32 val; | |
184 | ||
185 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
186 | ||
187 | if (!test_and_set_bit(0, &ctx->irq_flags)) { | |
188 | val = readl(ctx->regs + VIDINTCON0); | |
189 | ||
190 | val |= VIDINTCON0_INT_ENABLE; | |
191 | val |= VIDINTCON0_INT_FRAME; | |
192 | ||
193 | val &= ~VIDINTCON0_FRAMESEL0_MASK; | |
194 | val |= VIDINTCON0_FRAMESEL0_VSYNC; | |
195 | val &= ~VIDINTCON0_FRAMESEL1_MASK; | |
196 | val |= VIDINTCON0_FRAMESEL1_NONE; | |
197 | ||
198 | writel(val, ctx->regs + VIDINTCON0); | |
199 | } | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static void fimd_disable_vblank(struct device *dev) | |
205 | { | |
206 | struct fimd_context *ctx = get_fimd_context(dev); | |
207 | u32 val; | |
208 | ||
209 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
210 | ||
211 | if (test_and_clear_bit(0, &ctx->irq_flags)) { | |
212 | val = readl(ctx->regs + VIDINTCON0); | |
213 | ||
214 | val &= ~VIDINTCON0_INT_FRAME; | |
215 | val &= ~VIDINTCON0_INT_ENABLE; | |
216 | ||
217 | writel(val, ctx->regs + VIDINTCON0); | |
218 | } | |
219 | } | |
220 | ||
221 | static struct exynos_drm_manager_ops fimd_manager_ops = { | |
222 | .commit = fimd_commit, | |
223 | .enable_vblank = fimd_enable_vblank, | |
224 | .disable_vblank = fimd_disable_vblank, | |
225 | }; | |
226 | ||
227 | static void fimd_win_mode_set(struct device *dev, | |
228 | struct exynos_drm_overlay *overlay) | |
229 | { | |
230 | struct fimd_context *ctx = get_fimd_context(dev); | |
231 | struct fimd_win_data *win_data; | |
19c8b834 | 232 | unsigned long offset; |
1c248b7d ID |
233 | |
234 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
235 | ||
236 | if (!overlay) { | |
237 | dev_err(dev, "overlay is NULL\n"); | |
238 | return; | |
239 | } | |
240 | ||
19c8b834 ID |
241 | offset = overlay->fb_x * (overlay->bpp >> 3); |
242 | offset += overlay->fb_y * overlay->pitch; | |
243 | ||
244 | DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch); | |
245 | ||
1c248b7d ID |
246 | win_data = &ctx->win_data[ctx->default_win]; |
247 | ||
19c8b834 ID |
248 | win_data->offset_x = overlay->crtc_x; |
249 | win_data->offset_y = overlay->crtc_y; | |
250 | win_data->ovl_width = overlay->crtc_width; | |
251 | win_data->ovl_height = overlay->crtc_height; | |
252 | win_data->fb_width = overlay->fb_width; | |
253 | win_data->fb_height = overlay->fb_height; | |
254 | win_data->paddr = overlay->paddr + offset; | |
255 | win_data->vaddr = overlay->vaddr + offset; | |
1c248b7d | 256 | win_data->bpp = overlay->bpp; |
19c8b834 ID |
257 | win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * |
258 | (overlay->bpp >> 3); | |
259 | win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); | |
260 | ||
261 | DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n", | |
262 | win_data->offset_x, win_data->offset_y); | |
263 | DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", | |
264 | win_data->ovl_width, win_data->ovl_height); | |
265 | DRM_DEBUG_KMS("paddr = 0x%lx, vaddr = 0x%lx\n", | |
266 | (unsigned long)win_data->paddr, | |
267 | (unsigned long)win_data->vaddr); | |
268 | DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n", | |
269 | overlay->fb_width, overlay->crtc_width); | |
1c248b7d ID |
270 | } |
271 | ||
272 | static void fimd_win_set_pixfmt(struct device *dev, unsigned int win) | |
273 | { | |
274 | struct fimd_context *ctx = get_fimd_context(dev); | |
275 | struct fimd_win_data *win_data = &ctx->win_data[win]; | |
276 | unsigned long val; | |
277 | ||
278 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
279 | ||
280 | val = WINCONx_ENWIN; | |
281 | ||
282 | switch (win_data->bpp) { | |
283 | case 1: | |
284 | val |= WINCON0_BPPMODE_1BPP; | |
285 | val |= WINCONx_BITSWP; | |
286 | val |= WINCONx_BURSTLEN_4WORD; | |
287 | break; | |
288 | case 2: | |
289 | val |= WINCON0_BPPMODE_2BPP; | |
290 | val |= WINCONx_BITSWP; | |
291 | val |= WINCONx_BURSTLEN_8WORD; | |
292 | break; | |
293 | case 4: | |
294 | val |= WINCON0_BPPMODE_4BPP; | |
295 | val |= WINCONx_BITSWP; | |
296 | val |= WINCONx_BURSTLEN_8WORD; | |
297 | break; | |
298 | case 8: | |
299 | val |= WINCON0_BPPMODE_8BPP_PALETTE; | |
300 | val |= WINCONx_BURSTLEN_8WORD; | |
301 | val |= WINCONx_BYTSWP; | |
302 | break; | |
303 | case 16: | |
304 | val |= WINCON0_BPPMODE_16BPP_565; | |
305 | val |= WINCONx_HAWSWP; | |
306 | val |= WINCONx_BURSTLEN_16WORD; | |
307 | break; | |
308 | case 24: | |
309 | val |= WINCON0_BPPMODE_24BPP_888; | |
310 | val |= WINCONx_WSWP; | |
311 | val |= WINCONx_BURSTLEN_16WORD; | |
312 | break; | |
313 | case 32: | |
314 | val |= WINCON1_BPPMODE_28BPP_A4888 | |
315 | | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; | |
316 | val |= WINCONx_WSWP; | |
317 | val |= WINCONx_BURSTLEN_16WORD; | |
318 | break; | |
319 | default: | |
320 | DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n"); | |
321 | ||
322 | val |= WINCON0_BPPMODE_24BPP_888; | |
323 | val |= WINCONx_WSWP; | |
324 | val |= WINCONx_BURSTLEN_16WORD; | |
325 | break; | |
326 | } | |
327 | ||
328 | DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp); | |
329 | ||
330 | writel(val, ctx->regs + WINCON(win)); | |
331 | } | |
332 | ||
333 | static void fimd_win_set_colkey(struct device *dev, unsigned int win) | |
334 | { | |
335 | struct fimd_context *ctx = get_fimd_context(dev); | |
336 | unsigned int keycon0 = 0, keycon1 = 0; | |
337 | ||
338 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
339 | ||
340 | keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F | | |
341 | WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0); | |
342 | ||
343 | keycon1 = WxKEYCON1_COLVAL(0xffffffff); | |
344 | ||
345 | writel(keycon0, ctx->regs + WKEYCON0_BASE(win)); | |
346 | writel(keycon1, ctx->regs + WKEYCON1_BASE(win)); | |
347 | } | |
348 | ||
349 | static void fimd_win_commit(struct device *dev) | |
350 | { | |
351 | struct fimd_context *ctx = get_fimd_context(dev); | |
352 | struct fimd_win_data *win_data; | |
353 | int win = ctx->default_win; | |
354 | unsigned long val, alpha, size; | |
355 | ||
356 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
357 | ||
358 | if (win < 0 || win > WINDOWS_NR) | |
359 | return; | |
360 | ||
361 | win_data = &ctx->win_data[win]; | |
362 | ||
363 | /* | |
364 | * SHADOWCON register is used for enabling timing. | |
365 | * | |
366 | * for example, once only width value of a register is set, | |
367 | * if the dma is started then fimd hardware could malfunction so | |
368 | * with protect window setting, the register fields with prefix '_F' | |
369 | * wouldn't be updated at vsync also but updated once unprotect window | |
370 | * is set. | |
371 | */ | |
372 | ||
373 | /* protect windows */ | |
374 | val = readl(ctx->regs + SHADOWCON); | |
375 | val |= SHADOWCON_WINx_PROTECT(win); | |
376 | writel(val, ctx->regs + SHADOWCON); | |
377 | ||
378 | /* buffer start address */ | |
379 | val = win_data->paddr; | |
380 | writel(val, ctx->regs + VIDWx_BUF_START(win, 0)); | |
381 | ||
382 | /* buffer end address */ | |
19c8b834 | 383 | size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3); |
1c248b7d ID |
384 | val = win_data->paddr + size; |
385 | writel(val, ctx->regs + VIDWx_BUF_END(win, 0)); | |
386 | ||
387 | DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n", | |
388 | (unsigned long)win_data->paddr, val, size); | |
19c8b834 ID |
389 | DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n", |
390 | win_data->ovl_width, win_data->ovl_height); | |
1c248b7d ID |
391 | |
392 | /* buffer size */ | |
393 | val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) | | |
394 | VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size); | |
395 | writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0)); | |
396 | ||
397 | /* OSD position */ | |
398 | val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) | | |
399 | VIDOSDxA_TOPLEFT_Y(win_data->offset_y); | |
400 | writel(val, ctx->regs + VIDOSD_A(win)); | |
401 | ||
19c8b834 ID |
402 | val = VIDOSDxB_BOTRIGHT_X(win_data->offset_x + |
403 | win_data->ovl_width - 1) | | |
404 | VIDOSDxB_BOTRIGHT_Y(win_data->offset_y + | |
405 | win_data->ovl_height - 1); | |
1c248b7d ID |
406 | writel(val, ctx->regs + VIDOSD_B(win)); |
407 | ||
19c8b834 | 408 | DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n", |
1c248b7d | 409 | win_data->offset_x, win_data->offset_y, |
19c8b834 ID |
410 | win_data->offset_x + win_data->ovl_width - 1, |
411 | win_data->offset_y + win_data->ovl_height - 1); | |
1c248b7d ID |
412 | |
413 | /* hardware window 0 doesn't support alpha channel. */ | |
414 | if (win != 0) { | |
415 | /* OSD alpha */ | |
416 | alpha = VIDISD14C_ALPHA1_R(0xf) | | |
417 | VIDISD14C_ALPHA1_G(0xf) | | |
418 | VIDISD14C_ALPHA1_B(0xf); | |
419 | ||
420 | writel(alpha, ctx->regs + VIDOSD_C(win)); | |
421 | } | |
422 | ||
423 | /* OSD size */ | |
424 | if (win != 3 && win != 4) { | |
425 | u32 offset = VIDOSD_D(win); | |
426 | if (win == 0) | |
427 | offset = VIDOSD_C_SIZE_W0; | |
19c8b834 | 428 | val = win_data->ovl_width * win_data->ovl_height; |
1c248b7d ID |
429 | writel(val, ctx->regs + offset); |
430 | ||
431 | DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val); | |
432 | } | |
433 | ||
434 | fimd_win_set_pixfmt(dev, win); | |
435 | ||
436 | /* hardware window 0 doesn't support color key. */ | |
437 | if (win != 0) | |
438 | fimd_win_set_colkey(dev, win); | |
439 | ||
440 | /* Enable DMA channel and unprotect windows */ | |
441 | val = readl(ctx->regs + SHADOWCON); | |
442 | val |= SHADOWCON_CHx_ENABLE(win); | |
443 | val &= ~SHADOWCON_WINx_PROTECT(win); | |
444 | writel(val, ctx->regs + SHADOWCON); | |
445 | } | |
446 | ||
447 | static void fimd_win_disable(struct device *dev) | |
448 | { | |
449 | struct fimd_context *ctx = get_fimd_context(dev); | |
450 | struct fimd_win_data *win_data; | |
451 | int win = ctx->default_win; | |
452 | u32 val; | |
453 | ||
454 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
455 | ||
456 | if (win < 0 || win > WINDOWS_NR) | |
457 | return; | |
458 | ||
459 | win_data = &ctx->win_data[win]; | |
460 | ||
461 | /* protect windows */ | |
462 | val = readl(ctx->regs + SHADOWCON); | |
463 | val |= SHADOWCON_WINx_PROTECT(win); | |
464 | writel(val, ctx->regs + SHADOWCON); | |
465 | ||
466 | /* wincon */ | |
467 | val = readl(ctx->regs + WINCON(win)); | |
468 | val &= ~WINCONx_ENWIN; | |
469 | writel(val, ctx->regs + WINCON(win)); | |
470 | ||
471 | /* unprotect windows */ | |
472 | val = readl(ctx->regs + SHADOWCON); | |
473 | val &= ~SHADOWCON_CHx_ENABLE(win); | |
474 | val &= ~SHADOWCON_WINx_PROTECT(win); | |
475 | writel(val, ctx->regs + SHADOWCON); | |
476 | } | |
477 | ||
478 | static struct exynos_drm_overlay_ops fimd_overlay_ops = { | |
479 | .mode_set = fimd_win_mode_set, | |
480 | .commit = fimd_win_commit, | |
481 | .disable = fimd_win_disable, | |
482 | }; | |
483 | ||
1c248b7d ID |
484 | static void fimd_finish_pageflip(struct drm_device *drm_dev, int crtc) |
485 | { | |
486 | struct exynos_drm_private *dev_priv = drm_dev->dev_private; | |
487 | struct drm_pending_vblank_event *e, *t; | |
488 | struct timeval now; | |
489 | unsigned long flags; | |
ccf4d883 | 490 | bool is_checked = false; |
1c248b7d ID |
491 | |
492 | spin_lock_irqsave(&drm_dev->event_lock, flags); | |
493 | ||
1c248b7d ID |
494 | list_for_each_entry_safe(e, t, &dev_priv->pageflip_event_list, |
495 | base.link) { | |
a88cab2b | 496 | /* if event's pipe isn't same as crtc then ignore it. */ |
ccf4d883 ID |
497 | if (crtc != e->pipe) |
498 | continue; | |
499 | ||
500 | is_checked = true; | |
501 | ||
1c248b7d ID |
502 | do_gettimeofday(&now); |
503 | e->event.sequence = 0; | |
504 | e->event.tv_sec = now.tv_sec; | |
505 | e->event.tv_usec = now.tv_usec; | |
506 | ||
507 | list_move_tail(&e->base.link, &e->base.file_priv->event_list); | |
508 | wake_up_interruptible(&e->base.file_priv->event_wait); | |
509 | } | |
510 | ||
ccf4d883 ID |
511 | if (is_checked) |
512 | drm_vblank_put(drm_dev, crtc); | |
1c248b7d ID |
513 | |
514 | spin_unlock_irqrestore(&drm_dev->event_lock, flags); | |
515 | } | |
516 | ||
517 | static irqreturn_t fimd_irq_handler(int irq, void *dev_id) | |
518 | { | |
519 | struct fimd_context *ctx = (struct fimd_context *)dev_id; | |
520 | struct exynos_drm_subdrv *subdrv = &ctx->subdrv; | |
521 | struct drm_device *drm_dev = subdrv->drm_dev; | |
1c248b7d ID |
522 | struct exynos_drm_manager *manager = &subdrv->manager; |
523 | u32 val; | |
524 | ||
525 | val = readl(ctx->regs + VIDINTCON1); | |
526 | ||
527 | if (val & VIDINTCON1_INT_FRAME) | |
528 | /* VSYNC interrupt */ | |
529 | writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1); | |
530 | ||
531 | drm_handle_vblank(drm_dev, manager->pipe); | |
532 | fimd_finish_pageflip(drm_dev, manager->pipe); | |
533 | ||
534 | return IRQ_HANDLED; | |
535 | } | |
536 | ||
41c24346 | 537 | static int fimd_subdrv_probe(struct drm_device *drm_dev, struct device *dev) |
1c248b7d | 538 | { |
1c248b7d ID |
539 | DRM_DEBUG_KMS("%s\n", __FILE__); |
540 | ||
541 | /* | |
542 | * enable drm irq mode. | |
543 | * - with irq_enabled = 1, we can use the vblank feature. | |
544 | * | |
545 | * P.S. note that we wouldn't use drm irq handler but | |
546 | * just specific driver own one instead because | |
547 | * drm framework supports only one irq handler. | |
548 | */ | |
549 | drm_dev->irq_enabled = 1; | |
550 | ||
551 | /* | |
552 | * with vblank_disable_allowed = 1, vblank interrupt will be disabled | |
553 | * by drm timer once a current process gives up ownership of | |
554 | * vblank event.(drm_vblank_put function was called) | |
555 | */ | |
556 | drm_dev->vblank_disable_allowed = 1; | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | static void fimd_subdrv_remove(struct drm_device *drm_dev) | |
562 | { | |
1c248b7d ID |
563 | DRM_DEBUG_KMS("%s\n", __FILE__); |
564 | ||
565 | /* TODO. */ | |
566 | } | |
567 | ||
568 | static int fimd_calc_clkdiv(struct fimd_context *ctx, | |
569 | struct fb_videomode *timing) | |
570 | { | |
571 | unsigned long clk = clk_get_rate(ctx->lcd_clk); | |
572 | u32 retrace; | |
573 | u32 clkdiv; | |
574 | u32 best_framerate = 0; | |
575 | u32 framerate; | |
576 | ||
577 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
578 | ||
579 | retrace = timing->left_margin + timing->hsync_len + | |
580 | timing->right_margin + timing->xres; | |
581 | retrace *= timing->upper_margin + timing->vsync_len + | |
582 | timing->lower_margin + timing->yres; | |
583 | ||
584 | /* default framerate is 60Hz */ | |
585 | if (!timing->refresh) | |
586 | timing->refresh = 60; | |
587 | ||
588 | clk /= retrace; | |
589 | ||
590 | for (clkdiv = 1; clkdiv < 0x100; clkdiv++) { | |
591 | int tmp; | |
592 | ||
593 | /* get best framerate */ | |
594 | framerate = clk / clkdiv; | |
595 | tmp = timing->refresh - framerate; | |
596 | if (tmp < 0) { | |
597 | best_framerate = framerate; | |
598 | continue; | |
599 | } else { | |
600 | if (!best_framerate) | |
601 | best_framerate = framerate; | |
602 | else if (tmp < (best_framerate - framerate)) | |
603 | best_framerate = framerate; | |
604 | break; | |
605 | } | |
606 | } | |
607 | ||
608 | return clkdiv; | |
609 | } | |
610 | ||
611 | static void fimd_clear_win(struct fimd_context *ctx, int win) | |
612 | { | |
613 | u32 val; | |
614 | ||
615 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
616 | ||
617 | writel(0, ctx->regs + WINCON(win)); | |
618 | writel(0, ctx->regs + VIDOSD_A(win)); | |
619 | writel(0, ctx->regs + VIDOSD_B(win)); | |
620 | writel(0, ctx->regs + VIDOSD_C(win)); | |
621 | ||
622 | if (win == 1 || win == 2) | |
623 | writel(0, ctx->regs + VIDOSD_D(win)); | |
624 | ||
625 | val = readl(ctx->regs + SHADOWCON); | |
626 | val &= ~SHADOWCON_WINx_PROTECT(win); | |
627 | writel(val, ctx->regs + SHADOWCON); | |
628 | } | |
629 | ||
630 | static int __devinit fimd_probe(struct platform_device *pdev) | |
631 | { | |
632 | struct device *dev = &pdev->dev; | |
633 | struct fimd_context *ctx; | |
634 | struct exynos_drm_subdrv *subdrv; | |
635 | struct exynos_drm_fimd_pdata *pdata; | |
636 | struct fb_videomode *timing; | |
637 | struct resource *res; | |
638 | int win; | |
639 | int ret = -EINVAL; | |
640 | ||
641 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
642 | ||
643 | pdata = pdev->dev.platform_data; | |
644 | if (!pdata) { | |
645 | dev_err(dev, "no platform data specified\n"); | |
646 | return -EINVAL; | |
647 | } | |
648 | ||
649 | timing = &pdata->timing; | |
650 | if (!timing) { | |
651 | dev_err(dev, "timing is null.\n"); | |
652 | return -EINVAL; | |
653 | } | |
654 | ||
655 | ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); | |
656 | if (!ctx) | |
657 | return -ENOMEM; | |
658 | ||
659 | ctx->bus_clk = clk_get(dev, "fimd"); | |
660 | if (IS_ERR(ctx->bus_clk)) { | |
661 | dev_err(dev, "failed to get bus clock\n"); | |
662 | ret = PTR_ERR(ctx->bus_clk); | |
663 | goto err_clk_get; | |
664 | } | |
665 | ||
666 | clk_enable(ctx->bus_clk); | |
667 | ||
668 | ctx->lcd_clk = clk_get(dev, "sclk_fimd"); | |
669 | if (IS_ERR(ctx->lcd_clk)) { | |
670 | dev_err(dev, "failed to get lcd clock\n"); | |
671 | ret = PTR_ERR(ctx->lcd_clk); | |
672 | goto err_bus_clk; | |
673 | } | |
674 | ||
675 | clk_enable(ctx->lcd_clk); | |
676 | ||
677 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
678 | if (!res) { | |
679 | dev_err(dev, "failed to find registers\n"); | |
680 | ret = -ENOENT; | |
681 | goto err_clk; | |
682 | } | |
683 | ||
684 | ctx->regs_res = request_mem_region(res->start, resource_size(res), | |
685 | dev_name(dev)); | |
686 | if (!ctx->regs_res) { | |
687 | dev_err(dev, "failed to claim register region\n"); | |
688 | ret = -ENOENT; | |
689 | goto err_clk; | |
690 | } | |
691 | ||
692 | ctx->regs = ioremap(res->start, resource_size(res)); | |
693 | if (!ctx->regs) { | |
694 | dev_err(dev, "failed to map registers\n"); | |
695 | ret = -ENXIO; | |
696 | goto err_req_region_io; | |
697 | } | |
698 | ||
699 | res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
700 | if (!res) { | |
701 | dev_err(dev, "irq request failed.\n"); | |
702 | goto err_req_region_irq; | |
703 | } | |
704 | ||
705 | ctx->irq = res->start; | |
706 | ||
707 | for (win = 0; win < WINDOWS_NR; win++) | |
708 | fimd_clear_win(ctx, win); | |
709 | ||
710 | ret = request_irq(ctx->irq, fimd_irq_handler, 0, "drm_fimd", ctx); | |
711 | if (ret < 0) { | |
712 | dev_err(dev, "irq request failed.\n"); | |
713 | goto err_req_irq; | |
714 | } | |
715 | ||
716 | ctx->clkdiv = fimd_calc_clkdiv(ctx, timing); | |
717 | ctx->vidcon0 = pdata->vidcon0; | |
718 | ctx->vidcon1 = pdata->vidcon1; | |
719 | ctx->default_win = pdata->default_win; | |
720 | ctx->timing = timing; | |
721 | ||
722 | timing->pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv; | |
723 | ||
724 | DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n", | |
725 | timing->pixclock, ctx->clkdiv); | |
726 | ||
727 | subdrv = &ctx->subdrv; | |
728 | ||
729 | subdrv->probe = fimd_subdrv_probe; | |
730 | subdrv->remove = fimd_subdrv_remove; | |
731 | subdrv->manager.pipe = -1; | |
732 | subdrv->manager.ops = &fimd_manager_ops; | |
733 | subdrv->manager.overlay_ops = &fimd_overlay_ops; | |
74ccc539 | 734 | subdrv->manager.display_ops = &fimd_display_ops; |
1c248b7d ID |
735 | subdrv->manager.dev = dev; |
736 | ||
737 | platform_set_drvdata(pdev, ctx); | |
738 | exynos_drm_subdrv_register(subdrv); | |
739 | ||
740 | return 0; | |
741 | ||
742 | err_req_irq: | |
743 | err_req_region_irq: | |
744 | iounmap(ctx->regs); | |
745 | ||
746 | err_req_region_io: | |
747 | release_resource(ctx->regs_res); | |
748 | kfree(ctx->regs_res); | |
749 | ||
750 | err_clk: | |
751 | clk_disable(ctx->lcd_clk); | |
752 | clk_put(ctx->lcd_clk); | |
753 | ||
754 | err_bus_clk: | |
755 | clk_disable(ctx->bus_clk); | |
756 | clk_put(ctx->bus_clk); | |
757 | ||
758 | err_clk_get: | |
759 | kfree(ctx); | |
760 | return ret; | |
761 | } | |
762 | ||
763 | static int __devexit fimd_remove(struct platform_device *pdev) | |
764 | { | |
765 | struct fimd_context *ctx = platform_get_drvdata(pdev); | |
766 | ||
767 | DRM_DEBUG_KMS("%s\n", __FILE__); | |
768 | ||
769 | exynos_drm_subdrv_unregister(&ctx->subdrv); | |
770 | ||
771 | clk_disable(ctx->lcd_clk); | |
772 | clk_disable(ctx->bus_clk); | |
773 | clk_put(ctx->lcd_clk); | |
774 | clk_put(ctx->bus_clk); | |
775 | ||
776 | iounmap(ctx->regs); | |
777 | release_resource(ctx->regs_res); | |
778 | kfree(ctx->regs_res); | |
779 | free_irq(ctx->irq, ctx); | |
780 | ||
781 | kfree(ctx); | |
782 | ||
783 | return 0; | |
784 | } | |
785 | ||
786 | static struct platform_driver fimd_driver = { | |
787 | .probe = fimd_probe, | |
788 | .remove = __devexit_p(fimd_remove), | |
789 | .driver = { | |
790 | .name = "exynos4-fb", | |
791 | .owner = THIS_MODULE, | |
792 | }, | |
793 | }; | |
794 | ||
795 | static int __init fimd_init(void) | |
796 | { | |
797 | return platform_driver_register(&fimd_driver); | |
798 | } | |
799 | ||
800 | static void __exit fimd_exit(void) | |
801 | { | |
802 | platform_driver_unregister(&fimd_driver); | |
803 | } | |
804 | ||
805 | module_init(fimd_init); | |
806 | module_exit(fimd_exit); | |
807 | ||
808 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); | |
809 | MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); | |
810 | MODULE_DESCRIPTION("Samsung DRM FIMD Driver"); | |
811 | MODULE_LICENSE("GPL"); |