1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/gpu/drm/exynos5433_drm_decon.c
3  *
4  * Copyright (C) 2015 Samsung Electronics Co.Ltd
5  * Authors:
6  *	Joonyoung Shim <jy0922.shim@samsung.com>
7  *	Hyungwon Hwang <human.hwang@samsung.com>
8  */
9 
10 #include <linux/clk.h>
11 #include <linux/component.h>
12 #include <linux/iopoll.h>
13 #include <linux/irq.h>
14 #include <linux/mfd/syscon.h>
15 #include <linux/of_device.h>
16 #include <linux/of_gpio.h>
17 #include <linux/platform_device.h>
18 #include <linux/pm_runtime.h>
19 #include <linux/regmap.h>
20 
21 #include <drm/drm_fourcc.h>
22 #include <drm/drm_vblank.h>
23 
24 #include "exynos_drm_crtc.h"
25 #include "exynos_drm_drv.h"
26 #include "exynos_drm_fb.h"
27 #include "exynos_drm_plane.h"
28 #include "regs-decon5433.h"
29 
30 #define DSD_CFG_MUX 0x1004
31 #define DSD_CFG_MUX_TE_UNMASK_GLOBAL BIT(13)
32 
33 #define WINDOWS_NR	5
34 #define PRIMARY_WIN	2
35 #define CURSON_WIN	4
36 
37 #define MIN_FB_WIDTH_FOR_16WORD_BURST	128
38 
39 #define I80_HW_TRG	(1 << 0)
40 #define IFTYPE_HDMI	(1 << 1)
41 
42 static const char * const decon_clks_name[] = {
43 	"pclk",
44 	"aclk_decon",
45 	"aclk_smmu_decon0x",
46 	"aclk_xiu_decon0x",
47 	"pclk_smmu_decon0x",
48 	"aclk_smmu_decon1x",
49 	"aclk_xiu_decon1x",
50 	"pclk_smmu_decon1x",
51 	"sclk_decon_vclk",
52 	"sclk_decon_eclk",
53 };
54 
55 struct decon_context {
56 	struct device			*dev;
57 	struct drm_device		*drm_dev;
58 	struct exynos_drm_crtc		*crtc;
59 	struct exynos_drm_plane		planes[WINDOWS_NR];
60 	struct exynos_drm_plane_config	configs[WINDOWS_NR];
61 	void __iomem			*addr;
62 	struct regmap			*sysreg;
63 	struct clk			*clks[ARRAY_SIZE(decon_clks_name)];
64 	unsigned int			irq;
65 	unsigned int			irq_vsync;
66 	unsigned int			irq_lcd_sys;
67 	unsigned int			te_irq;
68 	unsigned long			out_type;
69 	int				first_win;
70 	spinlock_t			vblank_lock;
71 	u32				frame_id;
72 };
73 
74 static const uint32_t decon_formats[] = {
75 	DRM_FORMAT_XRGB1555,
76 	DRM_FORMAT_RGB565,
77 	DRM_FORMAT_XRGB8888,
78 	DRM_FORMAT_ARGB8888,
79 };
80 
81 static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
82 	[PRIMARY_WIN] = DRM_PLANE_TYPE_PRIMARY,
83 	[CURSON_WIN] = DRM_PLANE_TYPE_CURSOR,
84 };
85 
86 static const unsigned int capabilities[WINDOWS_NR] = {
87 	0,
88 	EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
89 	EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
90 	EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
91 	EXYNOS_DRM_PLANE_CAP_WIN_BLEND | EXYNOS_DRM_PLANE_CAP_PIX_BLEND,
92 };
93 
94 static inline void decon_set_bits(struct decon_context *ctx, u32 reg, u32 mask,
95 				  u32 val)
96 {
97 	val = (val & mask) | (readl(ctx->addr + reg) & ~mask);
98 	writel(val, ctx->addr + reg);
99 }
100 
101 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
102 {
103 	struct decon_context *ctx = crtc->ctx;
104 	u32 val;
105 
106 	val = VIDINTCON0_INTEN;
107 	if (crtc->i80_mode)
108 		val |= VIDINTCON0_FRAMEDONE;
109 	else
110 		val |= VIDINTCON0_INTFRMEN | VIDINTCON0_FRAMESEL_FP;
111 
112 	writel(val, ctx->addr + DECON_VIDINTCON0);
113 
114 	enable_irq(ctx->irq);
115 	if (!(ctx->out_type & I80_HW_TRG))
116 		enable_irq(ctx->te_irq);
117 
118 	return 0;
119 }
120 
121 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
122 {
123 	struct decon_context *ctx = crtc->ctx;
124 
125 	if (!(ctx->out_type & I80_HW_TRG))
126 		disable_irq_nosync(ctx->te_irq);
127 	disable_irq_nosync(ctx->irq);
128 
129 	writel(0, ctx->addr + DECON_VIDINTCON0);
130 }
131 
132 /* return number of starts/ends of frame transmissions since reset */
133 static u32 decon_get_frame_count(struct decon_context *ctx, bool end)
134 {
135 	u32 frm, pfrm, status, cnt = 2;
136 
137 	/* To get consistent result repeat read until frame id is stable.
138 	 * Usually the loop will be executed once, in rare cases when the loop
139 	 * is executed at frame change time 2nd pass will be needed.
140 	 */
141 	frm = readl(ctx->addr + DECON_CRFMID);
142 	do {
143 		status = readl(ctx->addr + DECON_VIDCON1);
144 		pfrm = frm;
145 		frm = readl(ctx->addr + DECON_CRFMID);
146 	} while (frm != pfrm && --cnt);
147 
148 	/* CRFMID is incremented on BPORCH in case of I80 and on VSYNC in case
149 	 * of RGB, it should be taken into account.
150 	 */
151 	if (!frm)
152 		return 0;
153 
154 	switch (status & (VIDCON1_VSTATUS_MASK | VIDCON1_I80_ACTIVE)) {
155 	case VIDCON1_VSTATUS_VS:
156 		if (!(ctx->crtc->i80_mode))
157 			--frm;
158 		break;
159 	case VIDCON1_VSTATUS_BP:
160 		--frm;
161 		break;
162 	case VIDCON1_I80_ACTIVE:
163 	case VIDCON1_VSTATUS_AC:
164 		if (end)
165 			--frm;
166 		break;
167 	default:
168 		break;
169 	}
170 
171 	return frm;
172 }
173 
174 static void decon_setup_trigger(struct decon_context *ctx)
175 {
176 	if (!ctx->crtc->i80_mode && !(ctx->out_type & I80_HW_TRG))
177 		return;
178 
179 	if (!(ctx->out_type & I80_HW_TRG)) {
180 		writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
181 		       TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN,
182 		       ctx->addr + DECON_TRIGCON);
183 		return;
184 	}
185 
186 	writel(TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F | TRIGCON_HWTRIGMASK
187 	       | TRIGCON_HWTRIGEN, ctx->addr + DECON_TRIGCON);
188 
189 	if (regmap_update_bits(ctx->sysreg, DSD_CFG_MUX,
190 			       DSD_CFG_MUX_TE_UNMASK_GLOBAL, ~0))
191 		DRM_DEV_ERROR(ctx->dev, "Cannot update sysreg.\n");
192 }
193 
194 static void decon_commit(struct exynos_drm_crtc *crtc)
195 {
196 	struct decon_context *ctx = crtc->ctx;
197 	struct drm_display_mode *m = &crtc->base.mode;
198 	bool interlaced = false;
199 	u32 val;
200 
201 	if (ctx->out_type & IFTYPE_HDMI) {
202 		m->crtc_hsync_start = m->crtc_hdisplay + 10;
203 		m->crtc_hsync_end = m->crtc_htotal - 92;
204 		m->crtc_vsync_start = m->crtc_vdisplay + 1;
205 		m->crtc_vsync_end = m->crtc_vsync_start + 1;
206 		if (m->flags & DRM_MODE_FLAG_INTERLACE)
207 			interlaced = true;
208 	}
209 
210 	decon_setup_trigger(ctx);
211 
212 	/* lcd on and use command if */
213 	val = VIDOUT_LCD_ON;
214 	if (interlaced)
215 		val |= VIDOUT_INTERLACE_EN_F;
216 	if (crtc->i80_mode) {
217 		val |= VIDOUT_COMMAND_IF;
218 	} else {
219 		val |= VIDOUT_RGB_IF;
220 	}
221 
222 	writel(val, ctx->addr + DECON_VIDOUTCON0);
223 
224 	if (interlaced)
225 		val = VIDTCON2_LINEVAL(m->vdisplay / 2 - 1) |
226 			VIDTCON2_HOZVAL(m->hdisplay - 1);
227 	else
228 		val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
229 			VIDTCON2_HOZVAL(m->hdisplay - 1);
230 	writel(val, ctx->addr + DECON_VIDTCON2);
231 
232 	if (!crtc->i80_mode) {
233 		int vbp = m->crtc_vtotal - m->crtc_vsync_end;
234 		int vfp = m->crtc_vsync_start - m->crtc_vdisplay;
235 
236 		if (interlaced)
237 			vbp = vbp / 2 - 1;
238 		val = VIDTCON00_VBPD_F(vbp - 1) | VIDTCON00_VFPD_F(vfp - 1);
239 		writel(val, ctx->addr + DECON_VIDTCON00);
240 
241 		val = VIDTCON01_VSPW_F(
242 				m->crtc_vsync_end - m->crtc_vsync_start - 1);
243 		writel(val, ctx->addr + DECON_VIDTCON01);
244 
245 		val = VIDTCON10_HBPD_F(
246 				m->crtc_htotal - m->crtc_hsync_end - 1) |
247 			VIDTCON10_HFPD_F(
248 				m->crtc_hsync_start - m->crtc_hdisplay - 1);
249 		writel(val, ctx->addr + DECON_VIDTCON10);
250 
251 		val = VIDTCON11_HSPW_F(
252 				m->crtc_hsync_end - m->crtc_hsync_start - 1);
253 		writel(val, ctx->addr + DECON_VIDTCON11);
254 	}
255 
256 	/* enable output and display signal */
257 	decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
258 
259 	decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
260 }
261 
262 static void decon_win_set_bldeq(struct decon_context *ctx, unsigned int win,
263 				unsigned int alpha, unsigned int pixel_alpha)
264 {
265 	u32 mask = BLENDERQ_A_FUNC_F(0xf) | BLENDERQ_B_FUNC_F(0xf);
266 	u32 val = 0;
267 
268 	switch (pixel_alpha) {
269 	case DRM_MODE_BLEND_PIXEL_NONE:
270 	case DRM_MODE_BLEND_COVERAGE:
271 		val |= BLENDERQ_A_FUNC_F(BLENDERQ_ALPHA_A);
272 		val |= BLENDERQ_B_FUNC_F(BLENDERQ_ONE_MINUS_ALPHA_A);
273 		break;
274 	case DRM_MODE_BLEND_PREMULTI:
275 	default:
276 		if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
277 			val |= BLENDERQ_A_FUNC_F(BLENDERQ_ALPHA0);
278 			val |= BLENDERQ_B_FUNC_F(BLENDERQ_ONE_MINUS_ALPHA_A);
279 		} else {
280 			val |= BLENDERQ_A_FUNC_F(BLENDERQ_ONE);
281 			val |= BLENDERQ_B_FUNC_F(BLENDERQ_ONE_MINUS_ALPHA_A);
282 		}
283 		break;
284 	}
285 	decon_set_bits(ctx, DECON_BLENDERQx(win), mask, val);
286 }
287 
288 static void decon_win_set_bldmod(struct decon_context *ctx, unsigned int win,
289 				 unsigned int alpha, unsigned int pixel_alpha)
290 {
291 	u32 win_alpha = alpha >> 8;
292 	u32 val = 0;
293 
294 	switch (pixel_alpha) {
295 	case DRM_MODE_BLEND_PIXEL_NONE:
296 		break;
297 	case DRM_MODE_BLEND_COVERAGE:
298 	case DRM_MODE_BLEND_PREMULTI:
299 	default:
300 		val |= WINCONx_ALPHA_SEL_F;
301 		val |= WINCONx_BLD_PIX_F;
302 		val |= WINCONx_ALPHA_MUL_F;
303 		break;
304 	}
305 	decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_BLEND_MODE_MASK, val);
306 
307 	if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
308 		val = VIDOSD_Wx_ALPHA_R_F(win_alpha) |
309 		      VIDOSD_Wx_ALPHA_G_F(win_alpha) |
310 		      VIDOSD_Wx_ALPHA_B_F(win_alpha);
311 		decon_set_bits(ctx, DECON_VIDOSDxC(win),
312 			       VIDOSDxC_ALPHA0_RGB_MASK, val);
313 		decon_set_bits(ctx, DECON_BLENDCON, BLEND_NEW, BLEND_NEW);
314 	}
315 }
316 
317 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
318 				 struct drm_framebuffer *fb)
319 {
320 	struct exynos_drm_plane plane = ctx->planes[win];
321 	struct exynos_drm_plane_state *state =
322 		to_exynos_plane_state(plane.base.state);
323 	unsigned int alpha = state->base.alpha;
324 	unsigned int pixel_alpha;
325 	unsigned long val;
326 
327 	if (fb->format->has_alpha)
328 		pixel_alpha = state->base.pixel_blend_mode;
329 	else
330 		pixel_alpha = DRM_MODE_BLEND_PIXEL_NONE;
331 
332 	val = readl(ctx->addr + DECON_WINCONx(win));
333 	val &= WINCONx_ENWIN_F;
334 
335 	switch (fb->format->format) {
336 	case DRM_FORMAT_XRGB1555:
337 		val |= WINCONx_BPPMODE_16BPP_I1555;
338 		val |= WINCONx_HAWSWP_F;
339 		val |= WINCONx_BURSTLEN_16WORD;
340 		break;
341 	case DRM_FORMAT_RGB565:
342 		val |= WINCONx_BPPMODE_16BPP_565;
343 		val |= WINCONx_HAWSWP_F;
344 		val |= WINCONx_BURSTLEN_16WORD;
345 		break;
346 	case DRM_FORMAT_XRGB8888:
347 		val |= WINCONx_BPPMODE_24BPP_888;
348 		val |= WINCONx_WSWP_F;
349 		val |= WINCONx_BURSTLEN_16WORD;
350 		break;
351 	case DRM_FORMAT_ARGB8888:
352 	default:
353 		val |= WINCONx_BPPMODE_32BPP_A8888;
354 		val |= WINCONx_WSWP_F;
355 		val |= WINCONx_BURSTLEN_16WORD;
356 		break;
357 	}
358 
359 	DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %u\n", fb->format->cpp[0]);
360 
361 	/*
362 	 * In case of exynos, setting dma-burst to 16Word causes permanent
363 	 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
364 	 * switching which is based on plane size is not recommended as
365 	 * plane size varies a lot towards the end of the screen and rapid
366 	 * movement causes unstable DMA which results into iommu crash/tear.
367 	 */
368 
369 	if (fb->width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
370 		val &= ~WINCONx_BURSTLEN_MASK;
371 		val |= WINCONx_BURSTLEN_8WORD;
372 	}
373 	decon_set_bits(ctx, DECON_WINCONx(win), ~WINCONx_BLEND_MODE_MASK, val);
374 
375 	if (win > 0) {
376 		decon_win_set_bldmod(ctx, win, alpha, pixel_alpha);
377 		decon_win_set_bldeq(ctx, win, alpha, pixel_alpha);
378 	}
379 }
380 
381 static void decon_shadow_protect(struct decon_context *ctx, bool protect)
382 {
383 	decon_set_bits(ctx, DECON_SHADOWCON, SHADOWCON_PROTECT_MASK,
384 		       protect ? ~0 : 0);
385 }
386 
387 static void decon_atomic_begin(struct exynos_drm_crtc *crtc)
388 {
389 	struct decon_context *ctx = crtc->ctx;
390 
391 	decon_shadow_protect(ctx, true);
392 }
393 
394 #define BIT_VAL(x, e, s) (((x) & ((1 << ((e) - (s) + 1)) - 1)) << (s))
395 #define COORDINATE_X(x) BIT_VAL((x), 23, 12)
396 #define COORDINATE_Y(x) BIT_VAL((x), 11, 0)
397 
398 static void decon_update_plane(struct exynos_drm_crtc *crtc,
399 			       struct exynos_drm_plane *plane)
400 {
401 	struct exynos_drm_plane_state *state =
402 				to_exynos_plane_state(plane->base.state);
403 	struct decon_context *ctx = crtc->ctx;
404 	struct drm_framebuffer *fb = state->base.fb;
405 	unsigned int win = plane->index;
406 	unsigned int cpp = fb->format->cpp[0];
407 	unsigned int pitch = fb->pitches[0];
408 	dma_addr_t dma_addr = exynos_drm_fb_dma_addr(fb, 0);
409 	u32 val;
410 
411 	if (crtc->base.mode.flags & DRM_MODE_FLAG_INTERLACE) {
412 		val = COORDINATE_X(state->crtc.x) |
413 			COORDINATE_Y(state->crtc.y / 2);
414 		writel(val, ctx->addr + DECON_VIDOSDxA(win));
415 
416 		val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
417 			COORDINATE_Y((state->crtc.y + state->crtc.h) / 2 - 1);
418 		writel(val, ctx->addr + DECON_VIDOSDxB(win));
419 	} else {
420 		val = COORDINATE_X(state->crtc.x) | COORDINATE_Y(state->crtc.y);
421 		writel(val, ctx->addr + DECON_VIDOSDxA(win));
422 
423 		val = COORDINATE_X(state->crtc.x + state->crtc.w - 1) |
424 				COORDINATE_Y(state->crtc.y + state->crtc.h - 1);
425 		writel(val, ctx->addr + DECON_VIDOSDxB(win));
426 	}
427 
428 	val = VIDOSD_Wx_ALPHA_R_F(0xff) | VIDOSD_Wx_ALPHA_G_F(0xff) |
429 		VIDOSD_Wx_ALPHA_B_F(0xff);
430 	writel(val, ctx->addr + DECON_VIDOSDxC(win));
431 
432 	val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
433 		VIDOSD_Wx_ALPHA_B_F(0x0);
434 	writel(val, ctx->addr + DECON_VIDOSDxD(win));
435 
436 	writel(dma_addr, ctx->addr + DECON_VIDW0xADD0B0(win));
437 
438 	val = dma_addr + pitch * state->src.h;
439 	writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));
440 
441 	if (!(ctx->out_type & IFTYPE_HDMI))
442 		val = BIT_VAL(pitch - state->crtc.w * cpp, 27, 14)
443 			| BIT_VAL(state->crtc.w * cpp, 13, 0);
444 	else
445 		val = BIT_VAL(pitch - state->crtc.w * cpp, 29, 15)
446 			| BIT_VAL(state->crtc.w * cpp, 14, 0);
447 	writel(val, ctx->addr + DECON_VIDW0xADD2(win));
448 
449 	decon_win_set_pixfmt(ctx, win, fb);
450 
451 	/* window enable */
452 	decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
453 }
454 
455 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
456 				struct exynos_drm_plane *plane)
457 {
458 	struct decon_context *ctx = crtc->ctx;
459 	unsigned int win = plane->index;
460 
461 	decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
462 }
463 
464 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)
465 {
466 	struct decon_context *ctx = crtc->ctx;
467 	unsigned long flags;
468 
469 	spin_lock_irqsave(&ctx->vblank_lock, flags);
470 
471 	decon_shadow_protect(ctx, false);
472 
473 	decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
474 
475 	ctx->frame_id = decon_get_frame_count(ctx, true);
476 
477 	exynos_crtc_handle_event(crtc);
478 
479 	spin_unlock_irqrestore(&ctx->vblank_lock, flags);
480 }
481 
482 static void decon_swreset(struct decon_context *ctx)
483 {
484 	unsigned long flags;
485 	u32 val;
486 	int ret;
487 
488 	writel(0, ctx->addr + DECON_VIDCON0);
489 	readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
490 			   ~val & VIDCON0_STOP_STATUS, 12, 20000);
491 
492 	writel(VIDCON0_SWRESET, ctx->addr + DECON_VIDCON0);
493 	ret = readl_poll_timeout(ctx->addr + DECON_VIDCON0, val,
494 				 ~val & VIDCON0_SWRESET, 12, 20000);
495 
496 	WARN(ret < 0, "failed to software reset DECON\n");
497 
498 	spin_lock_irqsave(&ctx->vblank_lock, flags);
499 	ctx->frame_id = 0;
500 	spin_unlock_irqrestore(&ctx->vblank_lock, flags);
501 
502 	if (!(ctx->out_type & IFTYPE_HDMI))
503 		return;
504 
505 	writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
506 	decon_set_bits(ctx, DECON_CMU,
507 		       CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F, ~0);
508 	writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
509 	writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
510 	       ctx->addr + DECON_CRCCTRL);
511 }
512 
513 static void decon_atomic_enable(struct exynos_drm_crtc *crtc)
514 {
515 	struct decon_context *ctx = crtc->ctx;
516 
517 	pm_runtime_get_sync(ctx->dev);
518 
519 	exynos_drm_pipe_clk_enable(crtc, true);
520 
521 	decon_swreset(ctx);
522 
523 	decon_commit(ctx->crtc);
524 }
525 
526 static void decon_atomic_disable(struct exynos_drm_crtc *crtc)
527 {
528 	struct decon_context *ctx = crtc->ctx;
529 	int i;
530 
531 	if (!(ctx->out_type & I80_HW_TRG))
532 		synchronize_irq(ctx->te_irq);
533 	synchronize_irq(ctx->irq);
534 
535 	/*
536 	 * We need to make sure that all windows are disabled before we
537 	 * suspend that connector. Otherwise we might try to scan from
538 	 * a destroyed buffer later.
539 	 */
540 	for (i = ctx->first_win; i < WINDOWS_NR; i++)
541 		decon_disable_plane(crtc, &ctx->planes[i]);
542 
543 	decon_swreset(ctx);
544 
545 	exynos_drm_pipe_clk_enable(crtc, false);
546 
547 	pm_runtime_put_sync(ctx->dev);
548 }
549 
550 static irqreturn_t decon_te_irq_handler(int irq, void *dev_id)
551 {
552 	struct decon_context *ctx = dev_id;
553 
554 	decon_set_bits(ctx, DECON_TRIGCON, TRIGCON_SWTRIGCMD, ~0);
555 
556 	return IRQ_HANDLED;
557 }
558 
559 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
560 {
561 	struct decon_context *ctx = crtc->ctx;
562 	int win, i, ret;
563 
564 	for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
565 		ret = clk_prepare_enable(ctx->clks[i]);
566 		if (ret < 0)
567 			goto err;
568 	}
569 
570 	decon_shadow_protect(ctx, true);
571 	for (win = 0; win < WINDOWS_NR; win++)
572 		decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
573 	decon_shadow_protect(ctx, false);
574 
575 	decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
576 
577 	/* TODO: wait for possible vsync */
578 	msleep(50);
579 
580 err:
581 	while (--i >= 0)
582 		clk_disable_unprepare(ctx->clks[i]);
583 }
584 
585 static enum drm_mode_status decon_mode_valid(struct exynos_drm_crtc *crtc,
586 		const struct drm_display_mode *mode)
587 {
588 	struct decon_context *ctx = crtc->ctx;
589 
590 	ctx->irq = crtc->i80_mode ? ctx->irq_lcd_sys : ctx->irq_vsync;
591 
592 	if (ctx->irq)
593 		return MODE_OK;
594 
595 	dev_info(ctx->dev, "Sink requires %s mode, but appropriate interrupt is not provided.\n",
596 			crtc->i80_mode ? "command" : "video");
597 
598 	return MODE_BAD;
599 }
600 
601 static const struct exynos_drm_crtc_ops decon_crtc_ops = {
602 	.atomic_enable		= decon_atomic_enable,
603 	.atomic_disable		= decon_atomic_disable,
604 	.enable_vblank		= decon_enable_vblank,
605 	.disable_vblank		= decon_disable_vblank,
606 	.atomic_begin		= decon_atomic_begin,
607 	.update_plane		= decon_update_plane,
608 	.disable_plane		= decon_disable_plane,
609 	.mode_valid		= decon_mode_valid,
610 	.atomic_flush		= decon_atomic_flush,
611 };
612 
613 static int decon_bind(struct device *dev, struct device *master, void *data)
614 {
615 	struct decon_context *ctx = dev_get_drvdata(dev);
616 	struct drm_device *drm_dev = data;
617 	struct exynos_drm_plane *exynos_plane;
618 	enum exynos_drm_output_type out_type;
619 	unsigned int win;
620 	int ret;
621 
622 	ctx->drm_dev = drm_dev;
623 
624 	for (win = ctx->first_win; win < WINDOWS_NR; win++) {
625 		ctx->configs[win].pixel_formats = decon_formats;
626 		ctx->configs[win].num_pixel_formats = ARRAY_SIZE(decon_formats);
627 		ctx->configs[win].zpos = win - ctx->first_win;
628 		ctx->configs[win].type = decon_win_types[win];
629 		ctx->configs[win].capabilities = capabilities[win];
630 
631 		ret = exynos_plane_init(drm_dev, &ctx->planes[win], win,
632 					&ctx->configs[win]);
633 		if (ret)
634 			return ret;
635 	}
636 
637 	exynos_plane = &ctx->planes[PRIMARY_WIN];
638 	out_type = (ctx->out_type & IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
639 						  : EXYNOS_DISPLAY_TYPE_LCD;
640 	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
641 			out_type, &decon_crtc_ops, ctx);
642 	if (IS_ERR(ctx->crtc))
643 		return PTR_ERR(ctx->crtc);
644 
645 	decon_clear_channels(ctx->crtc);
646 
647 	return exynos_drm_register_dma(drm_dev, dev);
648 }
649 
650 static void decon_unbind(struct device *dev, struct device *master, void *data)
651 {
652 	struct decon_context *ctx = dev_get_drvdata(dev);
653 
654 	decon_atomic_disable(ctx->crtc);
655 
656 	/* detach this sub driver from iommu mapping if supported. */
657 	exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev);
658 }
659 
660 static const struct component_ops decon_component_ops = {
661 	.bind	= decon_bind,
662 	.unbind = decon_unbind,
663 };
664 
665 static void decon_handle_vblank(struct decon_context *ctx)
666 {
667 	u32 frm;
668 
669 	spin_lock(&ctx->vblank_lock);
670 
671 	frm = decon_get_frame_count(ctx, true);
672 
673 	if (frm != ctx->frame_id) {
674 		/* handle only if incremented, take care of wrap-around */
675 		if ((s32)(frm - ctx->frame_id) > 0)
676 			drm_crtc_handle_vblank(&ctx->crtc->base);
677 		ctx->frame_id = frm;
678 	}
679 
680 	spin_unlock(&ctx->vblank_lock);
681 }
682 
683 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
684 {
685 	struct decon_context *ctx = dev_id;
686 	u32 val;
687 
688 	val = readl(ctx->addr + DECON_VIDINTCON1);
689 	val &= VIDINTCON1_INTFRMDONEPEND | VIDINTCON1_INTFRMPEND;
690 
691 	if (val) {
692 		writel(val, ctx->addr + DECON_VIDINTCON1);
693 		if (ctx->out_type & IFTYPE_HDMI) {
694 			val = readl(ctx->addr + DECON_VIDOUTCON0);
695 			val &= VIDOUT_INTERLACE_EN_F | VIDOUT_INTERLACE_FIELD_F;
696 			if (val ==
697 			    (VIDOUT_INTERLACE_EN_F | VIDOUT_INTERLACE_FIELD_F))
698 				return IRQ_HANDLED;
699 		}
700 		decon_handle_vblank(ctx);
701 	}
702 
703 	return IRQ_HANDLED;
704 }
705 
706 #ifdef CONFIG_PM
707 static int exynos5433_decon_suspend(struct device *dev)
708 {
709 	struct decon_context *ctx = dev_get_drvdata(dev);
710 	int i = ARRAY_SIZE(decon_clks_name);
711 
712 	while (--i >= 0)
713 		clk_disable_unprepare(ctx->clks[i]);
714 
715 	return 0;
716 }
717 
718 static int exynos5433_decon_resume(struct device *dev)
719 {
720 	struct decon_context *ctx = dev_get_drvdata(dev);
721 	int i, ret;
722 
723 	for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
724 		ret = clk_prepare_enable(ctx->clks[i]);
725 		if (ret < 0)
726 			goto err;
727 	}
728 
729 	return 0;
730 
731 err:
732 	while (--i >= 0)
733 		clk_disable_unprepare(ctx->clks[i]);
734 
735 	return ret;
736 }
737 #endif
738 
739 static const struct dev_pm_ops exynos5433_decon_pm_ops = {
740 	SET_RUNTIME_PM_OPS(exynos5433_decon_suspend, exynos5433_decon_resume,
741 			   NULL)
742 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
743 				     pm_runtime_force_resume)
744 };
745 
746 static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
747 	{
748 		.compatible = "samsung,exynos5433-decon",
749 		.data = (void *)I80_HW_TRG
750 	},
751 	{
752 		.compatible = "samsung,exynos5433-decon-tv",
753 		.data = (void *)(I80_HW_TRG | IFTYPE_HDMI)
754 	},
755 	{},
756 };
757 MODULE_DEVICE_TABLE(of, exynos5433_decon_driver_dt_match);
758 
759 static int decon_conf_irq(struct decon_context *ctx, const char *name,
760 		irq_handler_t handler, unsigned long int flags)
761 {
762 	struct platform_device *pdev = to_platform_device(ctx->dev);
763 	int ret, irq = platform_get_irq_byname(pdev, name);
764 
765 	if (irq < 0) {
766 		switch (irq) {
767 		case -EPROBE_DEFER:
768 			return irq;
769 		case -ENODATA:
770 		case -ENXIO:
771 			return 0;
772 		default:
773 			dev_err(ctx->dev, "IRQ %s get failed, %d\n", name, irq);
774 			return irq;
775 		}
776 	}
777 	irq_set_status_flags(irq, IRQ_NOAUTOEN);
778 	ret = devm_request_irq(ctx->dev, irq, handler, flags, "drm_decon", ctx);
779 	if (ret < 0) {
780 		dev_err(ctx->dev, "IRQ %s request failed\n", name);
781 		return ret;
782 	}
783 
784 	return irq;
785 }
786 
787 static int exynos5433_decon_probe(struct platform_device *pdev)
788 {
789 	struct device *dev = &pdev->dev;
790 	struct decon_context *ctx;
791 	struct resource *res;
792 	int ret;
793 	int i;
794 
795 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
796 	if (!ctx)
797 		return -ENOMEM;
798 
799 	ctx->dev = dev;
800 	ctx->out_type = (unsigned long)of_device_get_match_data(dev);
801 	spin_lock_init(&ctx->vblank_lock);
802 
803 	if (ctx->out_type & IFTYPE_HDMI)
804 		ctx->first_win = 1;
805 
806 	for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
807 		struct clk *clk;
808 
809 		clk = devm_clk_get(ctx->dev, decon_clks_name[i]);
810 		if (IS_ERR(clk))
811 			return PTR_ERR(clk);
812 
813 		ctx->clks[i] = clk;
814 	}
815 
816 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
817 	ctx->addr = devm_ioremap_resource(dev, res);
818 	if (IS_ERR(ctx->addr)) {
819 		dev_err(dev, "ioremap failed\n");
820 		return PTR_ERR(ctx->addr);
821 	}
822 
823 	ret = decon_conf_irq(ctx, "vsync", decon_irq_handler, 0);
824 	if (ret < 0)
825 		return ret;
826 	ctx->irq_vsync = ret;
827 
828 	ret = decon_conf_irq(ctx, "lcd_sys", decon_irq_handler, 0);
829 	if (ret < 0)
830 		return ret;
831 	ctx->irq_lcd_sys = ret;
832 
833 	ret = decon_conf_irq(ctx, "te", decon_te_irq_handler,
834 			IRQF_TRIGGER_RISING);
835 	if (ret < 0)
836 			return ret;
837 	if (ret) {
838 		ctx->te_irq = ret;
839 		ctx->out_type &= ~I80_HW_TRG;
840 	}
841 
842 	if (ctx->out_type & I80_HW_TRG) {
843 		ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
844 							"samsung,disp-sysreg");
845 		if (IS_ERR(ctx->sysreg)) {
846 			dev_err(dev, "failed to get system register\n");
847 			return PTR_ERR(ctx->sysreg);
848 		}
849 	}
850 
851 	platform_set_drvdata(pdev, ctx);
852 
853 	pm_runtime_enable(dev);
854 
855 	ret = component_add(dev, &decon_component_ops);
856 	if (ret)
857 		goto err_disable_pm_runtime;
858 
859 	return 0;
860 
861 err_disable_pm_runtime:
862 	pm_runtime_disable(dev);
863 
864 	return ret;
865 }
866 
867 static int exynos5433_decon_remove(struct platform_device *pdev)
868 {
869 	pm_runtime_disable(&pdev->dev);
870 
871 	component_del(&pdev->dev, &decon_component_ops);
872 
873 	return 0;
874 }
875 
876 struct platform_driver exynos5433_decon_driver = {
877 	.probe		= exynos5433_decon_probe,
878 	.remove		= exynos5433_decon_remove,
879 	.driver		= {
880 		.name	= "exynos5433-decon",
881 		.pm	= &exynos5433_decon_pm_ops,
882 		.of_match_table = exynos5433_decon_driver_dt_match,
883 	},
884 };
885