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