Linux Audio

Check our new training course

Embedded Linux training

Mar 31-Apr 8, 2025
Register
Loading...
v4.6
   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 <drm/drmP.h>
  15
  16#include <linux/kernel.h>
  17#include <linux/platform_device.h>
  18#include <linux/clk.h>
  19#include <linux/of.h>
  20#include <linux/of_device.h>
  21#include <linux/pm_runtime.h>
  22#include <linux/component.h>
  23#include <linux/mfd/syscon.h>
  24#include <linux/regmap.h>
  25
  26#include <video/of_display_timing.h>
  27#include <video/of_videomode.h>
  28#include <video/samsung_fimd.h>
  29#include <drm/exynos_drm.h>
  30
  31#include "exynos_drm_drv.h"
  32#include "exynos_drm_fb.h"
  33#include "exynos_drm_fbdev.h"
  34#include "exynos_drm_crtc.h"
  35#include "exynos_drm_plane.h"
  36#include "exynos_drm_iommu.h"
  37
  38/*
  39 * FIMD stands for Fully Interactive Mobile Display and
  40 * as a display controller, it transfers contents drawn on memory
  41 * to a LCD Panel through Display Interfaces such as RGB or
  42 * CPU Interface.
  43 */
  44
  45#define MIN_FB_WIDTH_FOR_16WORD_BURST 128
  46
  47/* position control register for hardware window 0, 2 ~ 4.*/
  48#define VIDOSD_A(win)		(VIDOSD_BASE + 0x00 + (win) * 16)
  49#define VIDOSD_B(win)		(VIDOSD_BASE + 0x04 + (win) * 16)
  50/*
  51 * size control register for hardware windows 0 and alpha control register
  52 * for hardware windows 1 ~ 4
  53 */
  54#define VIDOSD_C(win)		(VIDOSD_BASE + 0x08 + (win) * 16)
  55/* size control register for hardware windows 1 ~ 2. */
  56#define VIDOSD_D(win)		(VIDOSD_BASE + 0x0C + (win) * 16)
  57
  58#define VIDWnALPHA0(win)	(VIDW_ALPHA + 0x00 + (win) * 8)
  59#define VIDWnALPHA1(win)	(VIDW_ALPHA + 0x04 + (win) * 8)
  60
  61#define VIDWx_BUF_START(win, buf)	(VIDW_BUF_START(buf) + (win) * 8)
  62#define VIDWx_BUF_START_S(win, buf)	(VIDW_BUF_START_S(buf) + (win) * 8)
  63#define VIDWx_BUF_END(win, buf)		(VIDW_BUF_END(buf) + (win) * 8)
  64#define VIDWx_BUF_SIZE(win, buf)	(VIDW_BUF_SIZE(buf) + (win) * 4)
  65
  66/* color key control register for hardware window 1 ~ 4. */
  67#define WKEYCON0_BASE(x)		((WKEYCON0 + 0x140) + ((x - 1) * 8))
  68/* color key value register for hardware window 1 ~ 4. */
  69#define WKEYCON1_BASE(x)		((WKEYCON1 + 0x140) + ((x - 1) * 8))
  70
  71/* I80 / RGB trigger control register */
  72#define TRIGCON				0x1A4
  73#define TRGMODE_I80_RGB_ENABLE_I80	(1 << 0)
  74#define SWTRGCMD_I80_RGB_ENABLE		(1 << 1)
  75
  76/* display mode change control register except exynos4 */
  77#define VIDOUT_CON			0x000
  78#define VIDOUT_CON_F_I80_LDI0		(0x2 << 8)
  79
  80/* I80 interface control for main LDI register */
  81#define I80IFCONFAx(x)			(0x1B0 + (x) * 4)
  82#define I80IFCONFBx(x)			(0x1B8 + (x) * 4)
  83#define LCD_CS_SETUP(x)			((x) << 16)
  84#define LCD_WR_SETUP(x)			((x) << 12)
  85#define LCD_WR_ACTIVE(x)		((x) << 8)
  86#define LCD_WR_HOLD(x)			((x) << 4)
  87#define I80IFEN_ENABLE			(1 << 0)
  88
  89/* FIMD has totally five hardware windows. */
  90#define WINDOWS_NR	5
  91
 
 
  92struct fimd_driver_data {
  93	unsigned int timing_base;
  94	unsigned int lcdblk_offset;
  95	unsigned int lcdblk_vt_shift;
  96	unsigned int lcdblk_bypass_shift;
  97	unsigned int lcdblk_mic_bypass_shift;
  98
  99	unsigned int has_shadowcon:1;
 100	unsigned int has_clksel:1;
 101	unsigned int has_limited_fmt:1;
 102	unsigned int has_vidoutcon:1;
 103	unsigned int has_vtsel:1;
 104	unsigned int has_mic_bypass:1;
 105};
 106
 107static struct fimd_driver_data s3c64xx_fimd_driver_data = {
 108	.timing_base = 0x0,
 109	.has_clksel = 1,
 110	.has_limited_fmt = 1,
 111};
 112
 113static struct fimd_driver_data exynos3_fimd_driver_data = {
 114	.timing_base = 0x20000,
 115	.lcdblk_offset = 0x210,
 116	.lcdblk_bypass_shift = 1,
 117	.has_shadowcon = 1,
 118	.has_vidoutcon = 1,
 119};
 120
 121static struct fimd_driver_data exynos4_fimd_driver_data = {
 122	.timing_base = 0x0,
 123	.lcdblk_offset = 0x210,
 124	.lcdblk_vt_shift = 10,
 125	.lcdblk_bypass_shift = 1,
 126	.has_shadowcon = 1,
 127	.has_vtsel = 1,
 128};
 129
 130static struct fimd_driver_data exynos4415_fimd_driver_data = {
 131	.timing_base = 0x20000,
 132	.lcdblk_offset = 0x210,
 133	.lcdblk_vt_shift = 10,
 134	.lcdblk_bypass_shift = 1,
 135	.has_shadowcon = 1,
 136	.has_vidoutcon = 1,
 137	.has_vtsel = 1,
 138};
 139
 140static struct fimd_driver_data exynos5_fimd_driver_data = {
 141	.timing_base = 0x20000,
 142	.lcdblk_offset = 0x214,
 143	.lcdblk_vt_shift = 24,
 144	.lcdblk_bypass_shift = 15,
 145	.has_shadowcon = 1,
 146	.has_vidoutcon = 1,
 147	.has_vtsel = 1,
 148};
 149
 150static struct fimd_driver_data exynos5420_fimd_driver_data = {
 151	.timing_base = 0x20000,
 152	.lcdblk_offset = 0x214,
 153	.lcdblk_vt_shift = 24,
 154	.lcdblk_bypass_shift = 15,
 155	.lcdblk_mic_bypass_shift = 11,
 156	.has_shadowcon = 1,
 157	.has_vidoutcon = 1,
 158	.has_vtsel = 1,
 159	.has_mic_bypass = 1,
 
 
 
 
 160};
 161
 162struct fimd_context {
 163	struct device			*dev;
 164	struct drm_device		*drm_dev;
 165	struct exynos_drm_crtc		*crtc;
 166	struct exynos_drm_plane		planes[WINDOWS_NR];
 167	struct exynos_drm_plane_config	configs[WINDOWS_NR];
 168	struct clk			*bus_clk;
 169	struct clk			*lcd_clk;
 170	void __iomem			*regs;
 171	struct regmap			*sysreg;
 
 
 172	unsigned long			irq_flags;
 173	u32				vidcon0;
 174	u32				vidcon1;
 175	u32				vidout_con;
 176	u32				i80ifcon;
 177	bool				i80_if;
 178	bool				suspended;
 179	int				pipe;
 180	wait_queue_head_t		wait_vsync_queue;
 181	atomic_t			wait_vsync_event;
 182	atomic_t			win_updated;
 183	atomic_t			triggering;
 184
 
 185	struct fimd_driver_data *driver_data;
 186	struct drm_encoder *encoder;
 187};
 188
 189static const struct of_device_id fimd_driver_dt_match[] = {
 190	{ .compatible = "samsung,s3c6400-fimd",
 191	  .data = &s3c64xx_fimd_driver_data },
 192	{ .compatible = "samsung,exynos3250-fimd",
 193	  .data = &exynos3_fimd_driver_data },
 194	{ .compatible = "samsung,exynos4210-fimd",
 195	  .data = &exynos4_fimd_driver_data },
 196	{ .compatible = "samsung,exynos4415-fimd",
 197	  .data = &exynos4415_fimd_driver_data },
 198	{ .compatible = "samsung,exynos5250-fimd",
 199	  .data = &exynos5_fimd_driver_data },
 200	{ .compatible = "samsung,exynos5420-fimd",
 201	  .data = &exynos5420_fimd_driver_data },
 202	{},
 203};
 204MODULE_DEVICE_TABLE(of, fimd_driver_dt_match);
 205
 206static const enum drm_plane_type fimd_win_types[WINDOWS_NR] = {
 207	DRM_PLANE_TYPE_PRIMARY,
 208	DRM_PLANE_TYPE_OVERLAY,
 209	DRM_PLANE_TYPE_OVERLAY,
 210	DRM_PLANE_TYPE_OVERLAY,
 211	DRM_PLANE_TYPE_CURSOR,
 212};
 213
 214static const uint32_t fimd_formats[] = {
 215	DRM_FORMAT_C8,
 216	DRM_FORMAT_XRGB1555,
 217	DRM_FORMAT_RGB565,
 218	DRM_FORMAT_XRGB8888,
 219	DRM_FORMAT_ARGB8888,
 220};
 221
 222static inline struct fimd_driver_data *drm_fimd_get_driver_data(
 223	struct platform_device *pdev)
 224{
 225	const struct of_device_id *of_id =
 226			of_match_device(fimd_driver_dt_match, &pdev->dev);
 227
 228	return (struct fimd_driver_data *)of_id->data;
 229}
 230
 231static int fimd_enable_vblank(struct exynos_drm_crtc *crtc)
 
 232{
 233	struct fimd_context *ctx = crtc->ctx;
 234	u32 val;
 235
 236	if (ctx->suspended)
 237		return -EPERM;
 238
 239	if (!test_and_set_bit(0, &ctx->irq_flags)) {
 240		val = readl(ctx->regs + VIDINTCON0);
 241
 242		val |= VIDINTCON0_INT_ENABLE;
 
 
 
 
 
 
 
 
 243
 244		if (ctx->i80_if) {
 245			val |= VIDINTCON0_INT_I80IFDONE;
 246			val |= VIDINTCON0_INT_SYSMAINCON;
 247			val &= ~VIDINTCON0_INT_SYSSUBCON;
 248		} else {
 249			val |= VIDINTCON0_INT_FRAME;
 250
 251			val &= ~VIDINTCON0_FRAMESEL0_MASK;
 252			val |= VIDINTCON0_FRAMESEL0_VSYNC;
 253			val &= ~VIDINTCON0_FRAMESEL1_MASK;
 254			val |= VIDINTCON0_FRAMESEL1_NONE;
 255		}
 256
 257		writel(val, ctx->regs + VIDINTCON0);
 258	}
 
 259
 260	return 0;
 261}
 262
 263static void fimd_disable_vblank(struct exynos_drm_crtc *crtc)
 264{
 265	struct fimd_context *ctx = crtc->ctx;
 266	u32 val;
 267
 268	if (ctx->suspended)
 269		return;
 270
 271	if (test_and_clear_bit(0, &ctx->irq_flags)) {
 272		val = readl(ctx->regs + VIDINTCON0);
 
 
 273
 274		val &= ~VIDINTCON0_INT_ENABLE;
 
 
 
 
 275
 276		if (ctx->i80_if) {
 277			val &= ~VIDINTCON0_INT_I80IFDONE;
 278			val &= ~VIDINTCON0_INT_SYSMAINCON;
 279			val &= ~VIDINTCON0_INT_SYSSUBCON;
 280		} else
 281			val &= ~VIDINTCON0_INT_FRAME;
 282
 283		writel(val, ctx->regs + VIDINTCON0);
 284	}
 285}
 286
 287static void fimd_wait_for_vblank(struct exynos_drm_crtc *crtc)
 
 
 288{
 289	struct fimd_context *ctx = crtc->ctx;
 
 290
 291	if (ctx->suspended)
 292		return;
 293
 294	atomic_set(&ctx->wait_vsync_event, 1);
 295
 296	/*
 297	 * wait for FIMD to signal VSYNC interrupt or return after
 298	 * timeout which is set to 50ms (refresh rate of 20).
 299	 */
 300	if (!wait_event_timeout(ctx->wait_vsync_queue,
 301				!atomic_read(&ctx->wait_vsync_event),
 302				HZ/20))
 303		DRM_DEBUG_KMS("vblank wait timed out.\n");
 304}
 305
 306static void fimd_enable_video_output(struct fimd_context *ctx, unsigned int win,
 307					bool enable)
 308{
 309	u32 val = readl(ctx->regs + WINCON(win));
 310
 311	if (enable)
 312		val |= WINCONx_ENWIN;
 313	else
 314		val &= ~WINCONx_ENWIN;
 315
 316	writel(val, ctx->regs + WINCON(win));
 317}
 318
 319static void fimd_enable_shadow_channel_path(struct fimd_context *ctx,
 320						unsigned int win,
 321						bool enable)
 322{
 323	u32 val = readl(ctx->regs + SHADOWCON);
 
 
 
 
 324
 325	if (enable)
 326		val |= SHADOWCON_CHx_ENABLE(win);
 327	else
 328		val &= ~SHADOWCON_CHx_ENABLE(win);
 329
 330	writel(val, ctx->regs + SHADOWCON);
 331}
 
 332
 333static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
 334{
 335	struct fimd_context *ctx = crtc->ctx;
 336	unsigned int win, ch_enabled = 0;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 337
 338	DRM_DEBUG_KMS("%s\n", __FILE__);
 
 
 
 
 
 339
 340	/* Hardware is in unknown state, so ensure it gets enabled properly */
 341	pm_runtime_get_sync(ctx->dev);
 
 
 
 342
 343	clk_prepare_enable(ctx->bus_clk);
 344	clk_prepare_enable(ctx->lcd_clk);
 345
 346	/* Check if any channel is enabled. */
 347	for (win = 0; win < WINDOWS_NR; win++) {
 348		u32 val = readl(ctx->regs + WINCON(win));
 349
 350		if (val & WINCONx_ENWIN) {
 351			fimd_enable_video_output(ctx, win, false);
 352
 353			if (ctx->driver_data->has_shadowcon)
 354				fimd_enable_shadow_channel_path(ctx, win,
 355								false);
 
 356
 357			ch_enabled = 1;
 358		}
 359	}
 360
 361	/* Wait for vsync, as disable channel takes effect at next vsync */
 362	if (ch_enabled) {
 363		int pipe = ctx->pipe;
 364
 365		/* ensure that vblank interrupt won't be reported to core */
 366		ctx->suspended = false;
 367		ctx->pipe = -1;
 368
 369		fimd_enable_vblank(ctx->crtc);
 370		fimd_wait_for_vblank(ctx->crtc);
 371		fimd_disable_vblank(ctx->crtc);
 372
 373		ctx->suspended = true;
 374		ctx->pipe = pipe;
 375	}
 376
 377	clk_disable_unprepare(ctx->lcd_clk);
 378	clk_disable_unprepare(ctx->bus_clk);
 
 
 
 
 
 379
 380	pm_runtime_put(ctx->dev);
 381}
 382
 383static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
 384		const struct drm_display_mode *mode)
 385{
 386	unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
 387	u32 clkdiv;
 388
 389	if (ctx->i80_if) {
 390		/*
 391		 * The frame done interrupt should be occurred prior to the
 392		 * next TE signal.
 393		 */
 394		ideal_clk *= 2;
 395	}
 396
 397	/* Find the clock divider value that gets us closest to ideal_clk */
 398	clkdiv = DIV_ROUND_CLOSEST(clk_get_rate(ctx->lcd_clk), ideal_clk);
 399
 400	return (clkdiv < 0x100) ? clkdiv : 0xff;
 
 
 
 
 401}
 402
 403static void fimd_commit(struct exynos_drm_crtc *crtc)
 404{
 405	struct fimd_context *ctx = crtc->ctx;
 406	struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;
 407	struct fimd_driver_data *driver_data = ctx->driver_data;
 408	void *timing_base = ctx->regs + driver_data->timing_base;
 409	u32 val, clkdiv;
 410
 411	if (ctx->suspended)
 412		return;
 413
 414	/* nothing to do if we haven't set the mode yet */
 415	if (mode->htotal == 0 || mode->vtotal == 0)
 416		return;
 417
 418	if (ctx->i80_if) {
 419		val = ctx->i80ifcon | I80IFEN_ENABLE;
 420		writel(val, timing_base + I80IFCONFAx(0));
 421
 422		/* disable auto frame rate */
 423		writel(0, timing_base + I80IFCONFBx(0));
 424
 425		/* set video type selection to I80 interface */
 426		if (driver_data->has_vtsel && ctx->sysreg &&
 427				regmap_update_bits(ctx->sysreg,
 428					driver_data->lcdblk_offset,
 429					0x3 << driver_data->lcdblk_vt_shift,
 430					0x1 << driver_data->lcdblk_vt_shift)) {
 431			DRM_ERROR("Failed to update sysreg for I80 i/f.\n");
 432			return;
 433		}
 434	} else {
 435		int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
 436		u32 vidcon1;
 437
 438		/* setup polarity values */
 439		vidcon1 = ctx->vidcon1;
 440		if (mode->flags & DRM_MODE_FLAG_NVSYNC)
 441			vidcon1 |= VIDCON1_INV_VSYNC;
 442		if (mode->flags & DRM_MODE_FLAG_NHSYNC)
 443			vidcon1 |= VIDCON1_INV_HSYNC;
 444		writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
 445
 446		/* setup vertical timing values. */
 447		vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
 448		vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
 449		vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
 450
 451		val = VIDTCON0_VBPD(vbpd - 1) |
 452			VIDTCON0_VFPD(vfpd - 1) |
 453			VIDTCON0_VSPW(vsync_len - 1);
 454		writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
 455
 456		/* setup horizontal timing values.  */
 457		hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
 458		hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
 459		hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
 460
 461		val = VIDTCON1_HBPD(hbpd - 1) |
 462			VIDTCON1_HFPD(hfpd - 1) |
 463			VIDTCON1_HSPW(hsync_len - 1);
 464		writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
 465	}
 466
 467	if (driver_data->has_vidoutcon)
 468		writel(ctx->vidout_con, timing_base + VIDOUT_CON);
 469
 470	/* set bypass selection */
 471	if (ctx->sysreg && regmap_update_bits(ctx->sysreg,
 472				driver_data->lcdblk_offset,
 473				0x1 << driver_data->lcdblk_bypass_shift,
 474				0x1 << driver_data->lcdblk_bypass_shift)) {
 475		DRM_ERROR("Failed to update sysreg for bypass setting.\n");
 476		return;
 477	}
 478
 479	/* TODO: When MIC is enabled for display path, the lcdblk_mic_bypass
 480	 * bit should be cleared.
 481	 */
 482	if (driver_data->has_mic_bypass && ctx->sysreg &&
 483	    regmap_update_bits(ctx->sysreg,
 484				driver_data->lcdblk_offset,
 485				0x1 << driver_data->lcdblk_mic_bypass_shift,
 486				0x1 << driver_data->lcdblk_mic_bypass_shift)) {
 487		DRM_ERROR("Failed to update sysreg for bypass mic.\n");
 488		return;
 489	}
 490
 491	/* setup horizontal and vertical display size. */
 492	val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
 493	       VIDTCON2_HOZVAL(mode->hdisplay - 1) |
 494	       VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
 495	       VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
 496	writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
 497
 498	/*
 499	 * fields of register with prefix '_F' would be updated
 500	 * at vsync(same as dma start)
 501	 */
 502	val = ctx->vidcon0;
 503	val |= VIDCON0_ENVID | VIDCON0_ENVID_F;
 504
 505	if (ctx->driver_data->has_clksel)
 506		val |= VIDCON0_CLKSEL_LCD;
 507
 508	clkdiv = fimd_calc_clkdiv(ctx, mode);
 509	if (clkdiv > 1)
 510		val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
 
 
 
 
 
 
 
 
 
 511
 512	writel(val, ctx->regs + VIDCON0);
 
 
 
 
 
 
 513}
 514
 515
 516static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win,
 517				uint32_t pixel_format, int width)
 518{
 
 519	unsigned long val;
 520
 521	val = WINCONx_ENWIN;
 522
 523	/*
 524	 * In case of s3c64xx, window 0 doesn't support alpha channel.
 525	 * So the request format is ARGB8888 then change it to XRGB8888.
 526	 */
 527	if (ctx->driver_data->has_limited_fmt && !win) {
 528		if (pixel_format == DRM_FORMAT_ARGB8888)
 529			pixel_format = DRM_FORMAT_XRGB8888;
 530	}
 531
 532	switch (pixel_format) {
 533	case DRM_FORMAT_C8:
 534		val |= WINCON0_BPPMODE_8BPP_PALETTE;
 535		val |= WINCONx_BURSTLEN_8WORD;
 536		val |= WINCONx_BYTSWP;
 537		break;
 538	case DRM_FORMAT_XRGB1555:
 539		val |= WINCON0_BPPMODE_16BPP_1555;
 540		val |= WINCONx_HAWSWP;
 541		val |= WINCONx_BURSTLEN_16WORD;
 542		break;
 543	case DRM_FORMAT_RGB565:
 544		val |= WINCON0_BPPMODE_16BPP_565;
 545		val |= WINCONx_HAWSWP;
 546		val |= WINCONx_BURSTLEN_16WORD;
 547		break;
 548	case DRM_FORMAT_XRGB8888:
 549		val |= WINCON0_BPPMODE_24BPP_888;
 550		val |= WINCONx_WSWP;
 551		val |= WINCONx_BURSTLEN_16WORD;
 552		break;
 553	case DRM_FORMAT_ARGB8888:
 554		val |= WINCON1_BPPMODE_25BPP_A1888
 555			| WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
 556		val |= WINCONx_WSWP;
 557		val |= WINCONx_BURSTLEN_16WORD;
 558		break;
 559	default:
 560		DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
 561
 562		val |= WINCON0_BPPMODE_24BPP_888;
 563		val |= WINCONx_WSWP;
 564		val |= WINCONx_BURSTLEN_16WORD;
 565		break;
 566	}
 567
 568	/*
 569	 * Setting dma-burst to 16Word causes permanent tearing for very small
 570	 * buffers, e.g. cursor buffer. Burst Mode switching which based on
 571	 * plane size is not recommended as plane size varies alot towards the
 572	 * end of the screen and rapid movement causes unstable DMA, but it is
 573	 * still better to change dma-burst than displaying garbage.
 574	 */
 575
 576	if (width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
 577		val &= ~WINCONx_BURSTLEN_MASK;
 578		val |= WINCONx_BURSTLEN_4WORD;
 579	}
 580
 581	writel(val, ctx->regs + WINCON(win));
 582
 583	/* hardware window 0 doesn't support alpha channel. */
 584	if (win != 0) {
 585		/* OSD alpha */
 586		val = VIDISD14C_ALPHA0_R(0xf) |
 587			VIDISD14C_ALPHA0_G(0xf) |
 588			VIDISD14C_ALPHA0_B(0xf) |
 589			VIDISD14C_ALPHA1_R(0xf) |
 590			VIDISD14C_ALPHA1_G(0xf) |
 591			VIDISD14C_ALPHA1_B(0xf);
 592
 593		writel(val, ctx->regs + VIDOSD_C(win));
 594
 595		val = VIDW_ALPHA_R(0xf) | VIDW_ALPHA_G(0xf) |
 596			VIDW_ALPHA_G(0xf);
 597		writel(val, ctx->regs + VIDWnALPHA0(win));
 598		writel(val, ctx->regs + VIDWnALPHA1(win));
 599	}
 600}
 601
 602static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
 603{
 604	unsigned int keycon0 = 0, keycon1 = 0;
 605
 606	keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
 607			WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
 608
 609	keycon1 = WxKEYCON1_COLVAL(0xffffffff);
 610
 611	writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
 612	writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
 613}
 614
 615/**
 616 * shadow_protect_win() - disable updating values from shadow registers at vsync
 617 *
 618 * @win: window to protect registers for
 619 * @protect: 1 to protect (disable updates)
 620 */
 621static void fimd_shadow_protect_win(struct fimd_context *ctx,
 622				    unsigned int win, bool protect)
 623{
 624	u32 reg, bits, val;
 625
 626	/*
 627	 * SHADOWCON/PRTCON register is used for enabling timing.
 628	 *
 629	 * for example, once only width value of a register is set,
 630	 * if the dma is started then fimd hardware could malfunction so
 631	 * with protect window setting, the register fields with prefix '_F'
 632	 * wouldn't be updated at vsync also but updated once unprotect window
 633	 * is set.
 634	 */
 635
 636	if (ctx->driver_data->has_shadowcon) {
 637		reg = SHADOWCON;
 638		bits = SHADOWCON_WINx_PROTECT(win);
 639	} else {
 640		reg = PRTCON;
 641		bits = PRTCON_PROTECT;
 642	}
 643
 644	val = readl(ctx->regs + reg);
 645	if (protect)
 646		val |= bits;
 647	else
 648		val &= ~bits;
 649	writel(val, ctx->regs + reg);
 650}
 651
 652static void fimd_atomic_begin(struct exynos_drm_crtc *crtc)
 653{
 654	struct fimd_context *ctx = crtc->ctx;
 655	int i;
 
 
 
 
 656
 657	if (ctx->suspended)
 658		return;
 659
 660	for (i = 0; i < WINDOWS_NR; i++)
 661		fimd_shadow_protect_win(ctx, i, true);
 662}
 663
 664static void fimd_atomic_flush(struct exynos_drm_crtc *crtc)
 665{
 666	struct fimd_context *ctx = crtc->ctx;
 667	int i;
 668
 669	if (ctx->suspended)
 670		return;
 671
 672	for (i = 0; i < WINDOWS_NR; i++)
 673		fimd_shadow_protect_win(ctx, i, false);
 674}
 675
 676static void fimd_update_plane(struct exynos_drm_crtc *crtc,
 677			      struct exynos_drm_plane *plane)
 678{
 679	struct exynos_drm_plane_state *state =
 680				to_exynos_plane_state(plane->base.state);
 681	struct fimd_context *ctx = crtc->ctx;
 682	struct drm_framebuffer *fb = state->base.fb;
 683	dma_addr_t dma_addr;
 684	unsigned long val, size, offset;
 685	unsigned int last_x, last_y, buf_offsize, line_size;
 686	unsigned int win = plane->index;
 687	unsigned int bpp = fb->bits_per_pixel >> 3;
 688	unsigned int pitch = fb->pitches[0];
 689
 690	if (ctx->suspended)
 691		return;
 
 
 
 
 
 
 
 
 
 
 
 692
 693	offset = state->src.x * bpp;
 694	offset += state->src.y * pitch;
 695
 696	/* buffer start address */
 697	dma_addr = exynos_drm_fb_dma_addr(fb, 0) + offset;
 698	val = (unsigned long)dma_addr;
 699	writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
 700
 701	/* buffer end address */
 702	size = pitch * state->crtc.h;
 703	val = (unsigned long)(dma_addr + size);
 704	writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
 705
 706	DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
 707			(unsigned long)dma_addr, val, size);
 708	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
 709			state->crtc.w, state->crtc.h);
 710
 711	/* buffer size */
 712	buf_offsize = pitch - (state->crtc.w * bpp);
 713	line_size = state->crtc.w * bpp;
 714	val = VIDW_BUF_SIZE_OFFSET(buf_offsize) |
 715		VIDW_BUF_SIZE_PAGEWIDTH(line_size) |
 716		VIDW_BUF_SIZE_OFFSET_E(buf_offsize) |
 717		VIDW_BUF_SIZE_PAGEWIDTH_E(line_size);
 718	writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
 719
 720	/* OSD position */
 721	val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |
 722		VIDOSDxA_TOPLEFT_Y(state->crtc.y) |
 723		VIDOSDxA_TOPLEFT_X_E(state->crtc.x) |
 724		VIDOSDxA_TOPLEFT_Y_E(state->crtc.y);
 725	writel(val, ctx->regs + VIDOSD_A(win));
 726
 727	last_x = state->crtc.x + state->crtc.w;
 728	if (last_x)
 729		last_x--;
 730	last_y = state->crtc.y + state->crtc.h;
 731	if (last_y)
 732		last_y--;
 733
 734	val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
 735		VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
 736
 737	writel(val, ctx->regs + VIDOSD_B(win));
 738
 739	DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
 740			state->crtc.x, state->crtc.y, last_x, last_y);
 
 
 
 
 
 
 
 
 
 
 741
 742	/* OSD size */
 743	if (win != 3 && win != 4) {
 744		u32 offset = VIDOSD_D(win);
 745		if (win == 0)
 746			offset = VIDOSD_C(win);
 747		val = state->crtc.w * state->crtc.h;
 748		writel(val, ctx->regs + offset);
 749
 750		DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
 751	}
 752
 753	fimd_win_set_pixfmt(ctx, win, fb->pixel_format, state->src.w);
 754
 755	/* hardware window 0 doesn't support color key. */
 756	if (win != 0)
 757		fimd_win_set_colkey(ctx, win);
 758
 759	fimd_enable_video_output(ctx, win, true);
 
 
 
 760
 761	if (ctx->driver_data->has_shadowcon)
 762		fimd_enable_shadow_channel_path(ctx, win, true);
 763
 764	if (ctx->i80_if)
 765		atomic_set(&ctx->win_updated, 1);
 
 
 
 
 
 766}
 767
 768static void fimd_disable_plane(struct exynos_drm_crtc *crtc,
 769			       struct exynos_drm_plane *plane)
 770{
 771	struct fimd_context *ctx = crtc->ctx;
 772	unsigned int win = plane->index;
 
 
 773
 774	if (ctx->suspended)
 
 
 
 775		return;
 776
 777	fimd_enable_video_output(ctx, win, false);
 778
 779	if (ctx->driver_data->has_shadowcon)
 780		fimd_enable_shadow_channel_path(ctx, win, false);
 781}
 
 
 782
 783static void fimd_enable(struct exynos_drm_crtc *crtc)
 784{
 785	struct fimd_context *ctx = crtc->ctx;
 786
 787	if (!ctx->suspended)
 788		return;
 
 
 789
 790	ctx->suspended = false;
 
 
 
 
 
 791
 792	pm_runtime_get_sync(ctx->dev);
 793
 794	/* if vblank was enabled status, enable it again. */
 795	if (test_and_clear_bit(0, &ctx->irq_flags))
 796		fimd_enable_vblank(ctx->crtc);
 797
 798	fimd_commit(ctx->crtc);
 
 
 
 
 
 
 
 
 
 
 799}
 800
 801static void fimd_disable(struct exynos_drm_crtc *crtc)
 802{
 803	struct fimd_context *ctx = crtc->ctx;
 
 804	int i;
 805
 806	if (ctx->suspended)
 807		return;
 
 
 
 
 
 
 808
 809	/*
 810	 * We need to make sure that all windows are disabled before we
 811	 * suspend that connector. Otherwise we might try to scan from
 812	 * a destroyed buffer later.
 813	 */
 814	for (i = 0; i < WINDOWS_NR; i++)
 815		fimd_disable_plane(crtc, &ctx->planes[i]);
 816
 817	fimd_enable_vblank(crtc);
 818	fimd_wait_for_vblank(crtc);
 819	fimd_disable_vblank(crtc);
 
 
 
 820
 821	writel(0, ctx->regs + VIDCON0);
 
 
 
 
 822
 823	pm_runtime_put_sync(ctx->dev);
 824	ctx->suspended = true;
 
 
 
 
 
 825}
 826
 827static void fimd_trigger(struct device *dev)
 828{
 829	struct fimd_context *ctx = dev_get_drvdata(dev);
 830	struct fimd_driver_data *driver_data = ctx->driver_data;
 831	void *timing_base = ctx->regs + driver_data->timing_base;
 832	u32 reg;
 833
 834	 /*
 835	  * Skips triggering if in triggering state, because multiple triggering
 836	  * requests can cause panel reset.
 837	  */
 838	if (atomic_read(&ctx->triggering))
 839		return;
 840
 841	/* Enters triggering mode */
 842	atomic_set(&ctx->triggering, 1);
 843
 844	reg = readl(timing_base + TRIGCON);
 845	reg |= (TRGMODE_I80_RGB_ENABLE_I80 | SWTRGCMD_I80_RGB_ENABLE);
 846	writel(reg, timing_base + TRIGCON);
 847
 848	/*
 849	 * Exits triggering mode if vblank is not enabled yet, because when the
 850	 * VIDINTCON0 register is not set, it can not exit from triggering mode.
 851	 */
 852	if (!test_bit(0, &ctx->irq_flags))
 853		atomic_set(&ctx->triggering, 0);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 854}
 855
 856static void fimd_te_handler(struct exynos_drm_crtc *crtc)
 857{
 858	struct fimd_context *ctx = crtc->ctx;
 859
 860	/* Checks the crtc is detached already from encoder */
 861	if (ctx->pipe < 0 || !ctx->drm_dev)
 862		return;
 863
 864	/*
 865	 * If there is a page flip request, triggers and handles the page flip
 866	 * event so that current fb can be updated into panel GRAM.
 
 867	 */
 868	if (atomic_add_unless(&ctx->win_updated, -1, 0))
 869		fimd_trigger(ctx->dev);
 870
 871	/* Wakes up vsync event queue */
 872	if (atomic_read(&ctx->wait_vsync_event)) {
 873		atomic_set(&ctx->wait_vsync_event, 0);
 874		wake_up(&ctx->wait_vsync_queue);
 875	}
 876
 877	if (test_bit(0, &ctx->irq_flags))
 878		drm_crtc_handle_vblank(&ctx->crtc->base);
 
 
 879}
 880
 881static void fimd_dp_clock_enable(struct exynos_drm_crtc *crtc, bool enable)
 882{
 883	struct fimd_context *ctx = crtc->ctx;
 884	u32 val;
 885
 886	/*
 887	 * Only Exynos 5250, 5260, 5410 and 542x requires enabling DP/MIE
 888	 * clock. On these SoCs the bootloader may enable it but any
 889	 * power domain off/on will reset it to disable state.
 890	 */
 891	if (ctx->driver_data != &exynos5_fimd_driver_data &&
 892	    ctx->driver_data != &exynos5420_fimd_driver_data)
 893		return;
 894
 895	val = enable ? DP_MIE_CLK_DP_ENABLE : DP_MIE_CLK_DISABLE;
 896	writel(val, ctx->regs + DP_MIE_CLKCON);
 
 
 
 
 
 
 
 
 
 
 
 897}
 898
 899static const struct exynos_drm_crtc_ops fimd_crtc_ops = {
 900	.enable = fimd_enable,
 901	.disable = fimd_disable,
 
 
 
 902	.commit = fimd_commit,
 903	.enable_vblank = fimd_enable_vblank,
 904	.disable_vblank = fimd_disable_vblank,
 905	.wait_for_vblank = fimd_wait_for_vblank,
 906	.atomic_begin = fimd_atomic_begin,
 907	.update_plane = fimd_update_plane,
 908	.disable_plane = fimd_disable_plane,
 909	.atomic_flush = fimd_atomic_flush,
 910	.te_handler = fimd_te_handler,
 911	.clock_enable = fimd_dp_clock_enable,
 
 
 912};
 913
 914static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
 915{
 916	struct fimd_context *ctx = (struct fimd_context *)dev_id;
 917	u32 val, clear_bit, start, start_s;
 918	int win;
 919
 920	val = readl(ctx->regs + VIDINTCON1);
 921
 922	clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;
 923	if (val & clear_bit)
 924		writel(clear_bit, ctx->regs + VIDINTCON1);
 925
 926	/* check the crtc is detached already from encoder */
 927	if (ctx->pipe < 0 || !ctx->drm_dev)
 928		goto out;
 929
 930	if (!ctx->i80_if)
 931		drm_crtc_handle_vblank(&ctx->crtc->base);
 932
 933	for (win = 0 ; win < WINDOWS_NR ; win++) {
 934		struct exynos_drm_plane *plane = &ctx->planes[win];
 935
 936		if (!plane->pending_fb)
 937			continue;
 938
 939		start = readl(ctx->regs + VIDWx_BUF_START(win, 0));
 940		start_s = readl(ctx->regs + VIDWx_BUF_START_S(win, 0));
 941		if (start == start_s)
 942			exynos_drm_crtc_finish_update(ctx->crtc, plane);
 943	}
 944
 945	if (ctx->i80_if) {
 946		/* Exits triggering mode */
 947		atomic_set(&ctx->triggering, 0);
 948	} else {
 949		/* set wait vsync event to zero and wake up queue. */
 950		if (atomic_read(&ctx->wait_vsync_event)) {
 951			atomic_set(&ctx->wait_vsync_event, 0);
 952			wake_up(&ctx->wait_vsync_queue);
 953		}
 954	}
 955
 956out:
 957	return IRQ_HANDLED;
 958}
 959
 960static int fimd_bind(struct device *dev, struct device *master, void *data)
 961{
 962	struct fimd_context *ctx = dev_get_drvdata(dev);
 963	struct drm_device *drm_dev = data;
 964	struct exynos_drm_private *priv = drm_dev->dev_private;
 965	struct exynos_drm_plane *exynos_plane;
 966	unsigned int i;
 967	int ret;
 968
 969	ctx->drm_dev = drm_dev;
 970	ctx->pipe = priv->pipe++;
 971
 972	for (i = 0; i < WINDOWS_NR; i++) {
 973		ctx->configs[i].pixel_formats = fimd_formats;
 974		ctx->configs[i].num_pixel_formats = ARRAY_SIZE(fimd_formats);
 975		ctx->configs[i].zpos = i;
 976		ctx->configs[i].type = fimd_win_types[i];
 977		ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,
 978					1 << ctx->pipe, &ctx->configs[i]);
 979		if (ret)
 980			return ret;
 981	}
 982
 983	exynos_plane = &ctx->planes[DEFAULT_WIN];
 984	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
 985					   ctx->pipe, EXYNOS_DISPLAY_TYPE_LCD,
 986					   &fimd_crtc_ops, ctx);
 987	if (IS_ERR(ctx->crtc))
 988		return PTR_ERR(ctx->crtc);
 989
 990	if (ctx->encoder)
 991		exynos_dpi_bind(drm_dev, ctx->encoder);
 992
 993	if (is_drm_iommu_supported(drm_dev))
 994		fimd_clear_channels(ctx->crtc);
 995
 996	ret = drm_iommu_attach_device(drm_dev, dev);
 997	if (ret)
 998		priv->pipe--;
 999
1000	return ret;
1001}
1002
1003static void fimd_unbind(struct device *dev, struct device *master,
1004			void *data)
1005{
1006	struct fimd_context *ctx = dev_get_drvdata(dev);
1007
1008	fimd_disable(ctx->crtc);
1009
1010	drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
1011
1012	if (ctx->encoder)
1013		exynos_dpi_remove(ctx->encoder);
1014}
1015
1016static const struct component_ops fimd_component_ops = {
1017	.bind	= fimd_bind,
1018	.unbind = fimd_unbind,
1019};
1020
1021static int fimd_probe(struct platform_device *pdev)
1022{
1023	struct device *dev = &pdev->dev;
1024	struct fimd_context *ctx;
1025	struct device_node *i80_if_timings;
1026	struct resource *res;
1027	int ret;
 
1028
1029	if (!dev->of_node)
1030		return -ENODEV;
1031
1032	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
1033	if (!ctx)
1034		return -ENOMEM;
1035
1036	ctx->dev = dev;
1037	ctx->suspended = true;
1038	ctx->driver_data = drm_fimd_get_driver_data(pdev);
1039
1040	if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
1041		ctx->vidcon1 |= VIDCON1_INV_VDEN;
1042	if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
1043		ctx->vidcon1 |= VIDCON1_INV_VCLK;
1044
1045	i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");
1046	if (i80_if_timings) {
1047		u32 val;
1048
1049		ctx->i80_if = true;
1050
1051		if (ctx->driver_data->has_vidoutcon)
1052			ctx->vidout_con |= VIDOUT_CON_F_I80_LDI0;
1053		else
1054			ctx->vidcon0 |= VIDCON0_VIDOUT_I80_LDI0;
1055		/*
1056		 * The user manual describes that this "DSI_EN" bit is required
1057		 * to enable I80 24-bit data interface.
1058		 */
1059		ctx->vidcon0 |= VIDCON0_DSI_EN;
1060
1061		if (of_property_read_u32(i80_if_timings, "cs-setup", &val))
1062			val = 0;
1063		ctx->i80ifcon = LCD_CS_SETUP(val);
1064		if (of_property_read_u32(i80_if_timings, "wr-setup", &val))
1065			val = 0;
1066		ctx->i80ifcon |= LCD_WR_SETUP(val);
1067		if (of_property_read_u32(i80_if_timings, "wr-active", &val))
1068			val = 1;
1069		ctx->i80ifcon |= LCD_WR_ACTIVE(val);
1070		if (of_property_read_u32(i80_if_timings, "wr-hold", &val))
1071			val = 0;
1072		ctx->i80ifcon |= LCD_WR_HOLD(val);
1073	}
1074	of_node_put(i80_if_timings);
1075
1076	ctx->sysreg = syscon_regmap_lookup_by_phandle(dev->of_node,
1077							"samsung,sysreg");
1078	if (IS_ERR(ctx->sysreg)) {
1079		dev_warn(dev, "failed to get system register.\n");
1080		ctx->sysreg = NULL;
1081	}
1082
1083	ctx->bus_clk = devm_clk_get(dev, "fimd");
1084	if (IS_ERR(ctx->bus_clk)) {
1085		dev_err(dev, "failed to get bus clock\n");
1086		return PTR_ERR(ctx->bus_clk);
1087	}
1088
1089	ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
1090	if (IS_ERR(ctx->lcd_clk)) {
1091		dev_err(dev, "failed to get lcd clock\n");
1092		return PTR_ERR(ctx->lcd_clk);
1093	}
1094
1095	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1096
1097	ctx->regs = devm_ioremap_resource(dev, res);
1098	if (IS_ERR(ctx->regs))
1099		return PTR_ERR(ctx->regs);
1100
1101	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
1102					   ctx->i80_if ? "lcd_sys" : "vsync");
1103	if (!res) {
1104		dev_err(dev, "irq request failed.\n");
1105		return -ENXIO;
1106	}
1107
1108	ret = devm_request_irq(dev, res->start, fimd_irq_handler,
1109							0, "drm_fimd", ctx);
1110	if (ret) {
1111		dev_err(dev, "irq request failed.\n");
1112		return ret;
1113	}
1114
 
1115	init_waitqueue_head(&ctx->wait_vsync_queue);
1116	atomic_set(&ctx->wait_vsync_event, 0);
1117
1118	platform_set_drvdata(pdev, ctx);
1119
1120	ctx->encoder = exynos_dpi_probe(dev);
1121	if (IS_ERR(ctx->encoder))
1122		return PTR_ERR(ctx->encoder);
1123
1124	pm_runtime_enable(dev);
1125
1126	ret = component_add(dev, &fimd_component_ops);
1127	if (ret)
1128		goto err_disable_pm_runtime;
1129
1130	return ret;
1131
1132err_disable_pm_runtime:
1133	pm_runtime_disable(dev);
1134
1135	return ret;
1136}
1137
1138static int fimd_remove(struct platform_device *pdev)
1139{
1140	pm_runtime_disable(&pdev->dev);
1141
1142	component_del(&pdev->dev, &fimd_component_ops);
 
1143
1144	return 0;
1145}
1146
1147#ifdef CONFIG_PM
1148static int exynos_fimd_suspend(struct device *dev)
1149{
1150	struct fimd_context *ctx = dev_get_drvdata(dev);
1151
1152	clk_disable_unprepare(ctx->lcd_clk);
1153	clk_disable_unprepare(ctx->bus_clk);
1154
1155	return 0;
1156}
1157
1158static int exynos_fimd_resume(struct device *dev)
1159{
1160	struct fimd_context *ctx = dev_get_drvdata(dev);
1161	int ret;
1162
1163	ret = clk_prepare_enable(ctx->bus_clk);
1164	if (ret < 0) {
1165		DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
1166		return ret;
1167	}
1168
1169	ret = clk_prepare_enable(ctx->lcd_clk);
1170	if  (ret < 0) {
1171		DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
1172		return ret;
1173	}
1174
1175	return 0;
1176}
1177#endif
1178
1179static const struct dev_pm_ops exynos_fimd_pm_ops = {
1180	SET_RUNTIME_PM_OPS(exynos_fimd_suspend, exynos_fimd_resume, NULL)
1181};
1182
1183struct platform_driver fimd_driver = {
1184	.probe		= fimd_probe,
1185	.remove		= fimd_remove,
1186	.driver		= {
1187		.name	= "exynos4-fb",
1188		.owner	= THIS_MODULE,
1189		.pm	= &exynos_fimd_pm_ops,
1190		.of_match_table = fimd_driver_dt_match,
1191	},
1192};
v3.15
  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 <drm/drmP.h>
 15
 16#include <linux/kernel.h>
 17#include <linux/platform_device.h>
 18#include <linux/clk.h>
 19#include <linux/of.h>
 20#include <linux/of_device.h>
 21#include <linux/pm_runtime.h>
 
 
 
 22
 23#include <video/of_display_timing.h>
 24#include <video/of_videomode.h>
 25#include <video/samsung_fimd.h>
 26#include <drm/exynos_drm.h>
 27
 28#include "exynos_drm_drv.h"
 
 29#include "exynos_drm_fbdev.h"
 30#include "exynos_drm_crtc.h"
 
 31#include "exynos_drm_iommu.h"
 32
 33/*
 34 * FIMD stands for Fully Interactive Mobile Display and
 35 * as a display controller, it transfers contents drawn on memory
 36 * to a LCD Panel through Display Interfaces such as RGB or
 37 * CPU Interface.
 38 */
 39
 40#define FIMD_DEFAULT_FRAMERATE 60
 41
 42/* position control register for hardware window 0, 2 ~ 4.*/
 43#define VIDOSD_A(win)		(VIDOSD_BASE + 0x00 + (win) * 16)
 44#define VIDOSD_B(win)		(VIDOSD_BASE + 0x04 + (win) * 16)
 45/*
 46 * size control register for hardware windows 0 and alpha control register
 47 * for hardware windows 1 ~ 4
 48 */
 49#define VIDOSD_C(win)		(VIDOSD_BASE + 0x08 + (win) * 16)
 50/* size control register for hardware windows 1 ~ 2. */
 51#define VIDOSD_D(win)		(VIDOSD_BASE + 0x0C + (win) * 16)
 52
 
 
 
 53#define VIDWx_BUF_START(win, buf)	(VIDW_BUF_START(buf) + (win) * 8)
 
 54#define VIDWx_BUF_END(win, buf)		(VIDW_BUF_END(buf) + (win) * 8)
 55#define VIDWx_BUF_SIZE(win, buf)	(VIDW_BUF_SIZE(buf) + (win) * 4)
 56
 57/* color key control register for hardware window 1 ~ 4. */
 58#define WKEYCON0_BASE(x)		((WKEYCON0 + 0x140) + ((x - 1) * 8))
 59/* color key value register for hardware window 1 ~ 4. */
 60#define WKEYCON1_BASE(x)		((WKEYCON1 + 0x140) + ((x - 1) * 8))
 61
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 62/* FIMD has totally five hardware windows. */
 63#define WINDOWS_NR	5
 64
 65#define get_fimd_manager(mgr)	platform_get_drvdata(to_platform_device(dev))
 66
 67struct fimd_driver_data {
 68	unsigned int timing_base;
 
 
 
 
 69
 70	unsigned int has_shadowcon:1;
 71	unsigned int has_clksel:1;
 72	unsigned int has_limited_fmt:1;
 
 
 
 73};
 74
 75static struct fimd_driver_data s3c64xx_fimd_driver_data = {
 76	.timing_base = 0x0,
 77	.has_clksel = 1,
 78	.has_limited_fmt = 1,
 79};
 80
 
 
 
 
 
 
 
 
 81static struct fimd_driver_data exynos4_fimd_driver_data = {
 82	.timing_base = 0x0,
 
 
 
 83	.has_shadowcon = 1,
 
 
 
 
 
 
 
 
 
 
 
 84};
 85
 86static struct fimd_driver_data exynos5_fimd_driver_data = {
 87	.timing_base = 0x20000,
 
 
 
 88	.has_shadowcon = 1,
 
 
 89};
 90
 91struct fimd_win_data {
 92	unsigned int		offset_x;
 93	unsigned int		offset_y;
 94	unsigned int		ovl_width;
 95	unsigned int		ovl_height;
 96	unsigned int		fb_width;
 97	unsigned int		fb_height;
 98	unsigned int		bpp;
 99	unsigned int		pixel_format;
100	dma_addr_t		dma_addr;
101	unsigned int		buf_offsize;
102	unsigned int		line_size;	/* bytes */
103	bool			enabled;
104	bool			resume;
105};
106
107struct fimd_context {
108	struct device			*dev;
109	struct drm_device		*drm_dev;
 
 
 
110	struct clk			*bus_clk;
111	struct clk			*lcd_clk;
112	void __iomem			*regs;
113	struct drm_display_mode		mode;
114	struct fimd_win_data		win_data[WINDOWS_NR];
115	unsigned int			default_win;
116	unsigned long			irq_flags;
 
117	u32				vidcon1;
 
 
 
118	bool				suspended;
119	int				pipe;
120	wait_queue_head_t		wait_vsync_queue;
121	atomic_t			wait_vsync_event;
 
 
122
123	struct exynos_drm_panel_info panel;
124	struct fimd_driver_data *driver_data;
 
125};
126
127static const struct of_device_id fimd_driver_dt_match[] = {
128	{ .compatible = "samsung,s3c6400-fimd",
129	  .data = &s3c64xx_fimd_driver_data },
 
 
130	{ .compatible = "samsung,exynos4210-fimd",
131	  .data = &exynos4_fimd_driver_data },
 
 
132	{ .compatible = "samsung,exynos5250-fimd",
133	  .data = &exynos5_fimd_driver_data },
 
 
134	{},
135};
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
136
137static inline struct fimd_driver_data *drm_fimd_get_driver_data(
138	struct platform_device *pdev)
139{
140	const struct of_device_id *of_id =
141			of_match_device(fimd_driver_dt_match, &pdev->dev);
142
143	return (struct fimd_driver_data *)of_id->data;
144}
145
146static int fimd_mgr_initialize(struct exynos_drm_manager *mgr,
147			struct drm_device *drm_dev, int pipe)
148{
149	struct fimd_context *ctx = mgr->ctx;
 
 
 
 
150
151	ctx->drm_dev = drm_dev;
152	ctx->pipe = pipe;
153
154	/*
155	 * enable drm irq mode.
156	 * - with irq_enabled = true, we can use the vblank feature.
157	 *
158	 * P.S. note that we wouldn't use drm irq handler but
159	 *	just specific driver own one instead because
160	 *	drm framework supports only one irq handler.
161	 */
162	drm_dev->irq_enabled = true;
163
164	/*
165	 * with vblank_disable_allowed = true, vblank interrupt will be disabled
166	 * by drm timer once a current process gives up ownership of
167	 * vblank event.(after drm_vblank_put function is called)
168	 */
169	drm_dev->vblank_disable_allowed = true;
 
 
 
 
 
 
170
171	/* attach this sub driver to iommu mapping if supported. */
172	if (is_drm_iommu_supported(ctx->drm_dev))
173		drm_iommu_attach_device(ctx->drm_dev, ctx->dev);
174
175	return 0;
176}
177
178static void fimd_mgr_remove(struct exynos_drm_manager *mgr)
179{
180	struct fimd_context *ctx = mgr->ctx;
 
 
 
 
181
182	/* detach this sub driver from iommu mapping if supported. */
183	if (is_drm_iommu_supported(ctx->drm_dev))
184		drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
185}
186
187static u32 fimd_calc_clkdiv(struct fimd_context *ctx,
188		const struct drm_display_mode *mode)
189{
190	unsigned long ideal_clk = mode->htotal * mode->vtotal * mode->vrefresh;
191	u32 clkdiv;
192
193	/* Find the clock divider value that gets us closest to ideal_clk */
194	clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->lcd_clk), ideal_clk);
 
 
 
 
195
196	return (clkdiv < 0x100) ? clkdiv : 0xff;
 
197}
198
199static bool fimd_mode_fixup(struct exynos_drm_manager *mgr,
200		const struct drm_display_mode *mode,
201		struct drm_display_mode *adjusted_mode)
202{
203	if (adjusted_mode->vrefresh == 0)
204		adjusted_mode->vrefresh = FIMD_DEFAULT_FRAMERATE;
205
206	return true;
 
 
 
 
 
 
 
 
 
 
 
 
207}
208
209static void fimd_mode_set(struct exynos_drm_manager *mgr,
210		const struct drm_display_mode *in_mode)
211{
212	struct fimd_context *ctx = mgr->ctx;
213
214	drm_mode_copy(&ctx->mode, in_mode);
 
 
 
 
 
215}
216
217static void fimd_commit(struct exynos_drm_manager *mgr)
 
 
218{
219	struct fimd_context *ctx = mgr->ctx;
220	struct drm_display_mode *mode = &ctx->mode;
221	struct fimd_driver_data *driver_data;
222	u32 val, clkdiv, vidcon1;
223	int vsync_len, vbpd, vfpd, hsync_len, hbpd, hfpd;
224
225	driver_data = ctx->driver_data;
226	if (ctx->suspended)
227		return;
 
228
229	/* nothing to do if we haven't set the mode yet */
230	if (mode->htotal == 0 || mode->vtotal == 0)
231		return;
232
233	/* setup polarity values */
234	vidcon1 = ctx->vidcon1;
235	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
236		vidcon1 |= VIDCON1_INV_VSYNC;
237	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
238		vidcon1 |= VIDCON1_INV_HSYNC;
239	writel(vidcon1, ctx->regs + driver_data->timing_base + VIDCON1);
240
241	/* setup vertical timing values. */
242	vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;
243	vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;
244	vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;
245
246	val = VIDTCON0_VBPD(vbpd - 1) |
247		VIDTCON0_VFPD(vfpd - 1) |
248		VIDTCON0_VSPW(vsync_len - 1);
249	writel(val, ctx->regs + driver_data->timing_base + VIDTCON0);
250
251	/* setup horizontal timing values.  */
252	hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;
253	hbpd = mode->crtc_htotal - mode->crtc_hsync_end;
254	hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;
255
256	val = VIDTCON1_HBPD(hbpd - 1) |
257		VIDTCON1_HFPD(hfpd - 1) |
258		VIDTCON1_HSPW(hsync_len - 1);
259	writel(val, ctx->regs + driver_data->timing_base + VIDTCON1);
260
261	/* setup horizontal and vertical display size. */
262	val = VIDTCON2_LINEVAL(mode->vdisplay - 1) |
263	       VIDTCON2_HOZVAL(mode->hdisplay - 1) |
264	       VIDTCON2_LINEVAL_E(mode->vdisplay - 1) |
265	       VIDTCON2_HOZVAL_E(mode->hdisplay - 1);
266	writel(val, ctx->regs + driver_data->timing_base + VIDTCON2);
267
268	/*
269	 * fields of register with prefix '_F' would be updated
270	 * at vsync(same as dma start)
271	 */
272	val = VIDCON0_ENVID | VIDCON0_ENVID_F;
273
274	if (ctx->driver_data->has_clksel)
275		val |= VIDCON0_CLKSEL_LCD;
276
277	clkdiv = fimd_calc_clkdiv(ctx, mode);
278	if (clkdiv > 1)
279		val |= VIDCON0_CLKVAL_F(clkdiv - 1) | VIDCON0_CLKDIR;
280
281	writel(val, ctx->regs + VIDCON0);
282}
283
284static int fimd_enable_vblank(struct exynos_drm_manager *mgr)
285{
286	struct fimd_context *ctx = mgr->ctx;
287	u32 val;
288
289	if (ctx->suspended)
290		return -EPERM;
 
291
292	if (!test_and_set_bit(0, &ctx->irq_flags)) {
293		val = readl(ctx->regs + VIDINTCON0);
 
 
 
 
 
 
 
 
 
294
295		val |= VIDINTCON0_INT_ENABLE;
296		val |= VIDINTCON0_INT_FRAME;
 
297
298		val &= ~VIDINTCON0_FRAMESEL0_MASK;
299		val |= VIDINTCON0_FRAMESEL0_VSYNC;
300		val &= ~VIDINTCON0_FRAMESEL1_MASK;
301		val |= VIDINTCON0_FRAMESEL1_NONE;
302
303		writel(val, ctx->regs + VIDINTCON0);
304	}
305
306	return 0;
307}
308
309static void fimd_disable_vblank(struct exynos_drm_manager *mgr)
 
310{
311	struct fimd_context *ctx = mgr->ctx;
312	u32 val;
313
314	if (ctx->suspended)
315		return;
 
 
 
 
 
316
317	if (test_and_clear_bit(0, &ctx->irq_flags)) {
318		val = readl(ctx->regs + VIDINTCON0);
319
320		val &= ~VIDINTCON0_INT_FRAME;
321		val &= ~VIDINTCON0_INT_ENABLE;
322
323		writel(val, ctx->regs + VIDINTCON0);
324	}
325}
326
327static void fimd_wait_for_vblank(struct exynos_drm_manager *mgr)
328{
329	struct fimd_context *ctx = mgr->ctx;
 
 
 
 
330
331	if (ctx->suspended)
332		return;
333
334	atomic_set(&ctx->wait_vsync_event, 1);
 
 
335
336	/*
337	 * wait for FIMD to signal VSYNC interrupt or return after
338	 * timeout which is set to 50ms (refresh rate of 20).
339	 */
340	if (!wait_event_timeout(ctx->wait_vsync_queue,
341				!atomic_read(&ctx->wait_vsync_event),
342				HZ/20))
343		DRM_DEBUG_KMS("vblank wait timed out.\n");
344}
 
 
 
 
 
 
 
 
 
 
345
346static void fimd_win_mode_set(struct exynos_drm_manager *mgr,
347			struct exynos_drm_overlay *overlay)
348{
349	struct fimd_context *ctx = mgr->ctx;
350	struct fimd_win_data *win_data;
351	int win;
352	unsigned long offset;
353
354	if (!overlay) {
355		DRM_ERROR("overlay is NULL\n");
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
356		return;
357	}
358
359	win = overlay->zpos;
360	if (win == DEFAULT_ZPOS)
361		win = ctx->default_win;
362
363	if (win < 0 || win >= WINDOWS_NR)
 
 
 
 
364		return;
 
365
366	offset = overlay->fb_x * (overlay->bpp >> 3);
367	offset += overlay->fb_y * overlay->pitch;
 
 
 
 
368
369	DRM_DEBUG_KMS("offset = 0x%lx, pitch = %x\n", offset, overlay->pitch);
 
 
 
 
 
370
371	win_data = &ctx->win_data[win];
 
372
373	win_data->offset_x = overlay->crtc_x;
374	win_data->offset_y = overlay->crtc_y;
375	win_data->ovl_width = overlay->crtc_width;
376	win_data->ovl_height = overlay->crtc_height;
377	win_data->fb_width = overlay->fb_width;
378	win_data->fb_height = overlay->fb_height;
379	win_data->dma_addr = overlay->dma_addr[0] + offset;
380	win_data->bpp = overlay->bpp;
381	win_data->pixel_format = overlay->pixel_format;
382	win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) *
383				(overlay->bpp >> 3);
384	win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3);
385
386	DRM_DEBUG_KMS("offset_x = %d, offset_y = %d\n",
387			win_data->offset_x, win_data->offset_y);
388	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
389			win_data->ovl_width, win_data->ovl_height);
390	DRM_DEBUG_KMS("paddr = 0x%lx\n", (unsigned long)win_data->dma_addr);
391	DRM_DEBUG_KMS("fb_width = %d, crtc_width = %d\n",
392			overlay->fb_width, overlay->crtc_width);
393}
394
395static void fimd_win_set_pixfmt(struct fimd_context *ctx, unsigned int win)
 
 
396{
397	struct fimd_win_data *win_data = &ctx->win_data[win];
398	unsigned long val;
399
400	val = WINCONx_ENWIN;
401
402	/*
403	 * In case of s3c64xx, window 0 doesn't support alpha channel.
404	 * So the request format is ARGB8888 then change it to XRGB8888.
405	 */
406	if (ctx->driver_data->has_limited_fmt && !win) {
407		if (win_data->pixel_format == DRM_FORMAT_ARGB8888)
408			win_data->pixel_format = DRM_FORMAT_XRGB8888;
409	}
410
411	switch (win_data->pixel_format) {
412	case DRM_FORMAT_C8:
413		val |= WINCON0_BPPMODE_8BPP_PALETTE;
414		val |= WINCONx_BURSTLEN_8WORD;
415		val |= WINCONx_BYTSWP;
416		break;
417	case DRM_FORMAT_XRGB1555:
418		val |= WINCON0_BPPMODE_16BPP_1555;
419		val |= WINCONx_HAWSWP;
420		val |= WINCONx_BURSTLEN_16WORD;
421		break;
422	case DRM_FORMAT_RGB565:
423		val |= WINCON0_BPPMODE_16BPP_565;
424		val |= WINCONx_HAWSWP;
425		val |= WINCONx_BURSTLEN_16WORD;
426		break;
427	case DRM_FORMAT_XRGB8888:
428		val |= WINCON0_BPPMODE_24BPP_888;
429		val |= WINCONx_WSWP;
430		val |= WINCONx_BURSTLEN_16WORD;
431		break;
432	case DRM_FORMAT_ARGB8888:
433		val |= WINCON1_BPPMODE_25BPP_A1888
434			| WINCON1_BLD_PIX | WINCON1_ALPHA_SEL;
435		val |= WINCONx_WSWP;
436		val |= WINCONx_BURSTLEN_16WORD;
437		break;
438	default:
439		DRM_DEBUG_KMS("invalid pixel size so using unpacked 24bpp.\n");
440
441		val |= WINCON0_BPPMODE_24BPP_888;
442		val |= WINCONx_WSWP;
443		val |= WINCONx_BURSTLEN_16WORD;
444		break;
445	}
446
447	DRM_DEBUG_KMS("bpp = %d\n", win_data->bpp);
 
 
 
 
 
 
 
 
 
 
 
448
449	writel(val, ctx->regs + WINCON(win));
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
450}
451
452static void fimd_win_set_colkey(struct fimd_context *ctx, unsigned int win)
453{
454	unsigned int keycon0 = 0, keycon1 = 0;
455
456	keycon0 = ~(WxKEYCON0_KEYBL_EN | WxKEYCON0_KEYEN_F |
457			WxKEYCON0_DIRCON) | WxKEYCON0_COMPKEY(0);
458
459	keycon1 = WxKEYCON1_COLVAL(0xffffffff);
460
461	writel(keycon0, ctx->regs + WKEYCON0_BASE(win));
462	writel(keycon1, ctx->regs + WKEYCON1_BASE(win));
463}
464
465/**
466 * shadow_protect_win() - disable updating values from shadow registers at vsync
467 *
468 * @win: window to protect registers for
469 * @protect: 1 to protect (disable updates)
470 */
471static void fimd_shadow_protect_win(struct fimd_context *ctx,
472							int win, bool protect)
473{
474	u32 reg, bits, val;
475
 
 
 
 
 
 
 
 
 
 
476	if (ctx->driver_data->has_shadowcon) {
477		reg = SHADOWCON;
478		bits = SHADOWCON_WINx_PROTECT(win);
479	} else {
480		reg = PRTCON;
481		bits = PRTCON_PROTECT;
482	}
483
484	val = readl(ctx->regs + reg);
485	if (protect)
486		val |= bits;
487	else
488		val &= ~bits;
489	writel(val, ctx->regs + reg);
490}
491
492static void fimd_win_commit(struct exynos_drm_manager *mgr, int zpos)
493{
494	struct fimd_context *ctx = mgr->ctx;
495	struct fimd_win_data *win_data;
496	int win = zpos;
497	unsigned long val, alpha, size;
498	unsigned int last_x;
499	unsigned int last_y;
500
501	if (ctx->suspended)
502		return;
503
504	if (win == DEFAULT_ZPOS)
505		win = ctx->default_win;
 
 
 
 
 
 
506
507	if (win < 0 || win >= WINDOWS_NR)
508		return;
509
510	win_data = &ctx->win_data[win];
 
 
511
512	/* If suspended, enable this on resume */
513	if (ctx->suspended) {
514		win_data->resume = true;
 
 
 
 
 
 
 
 
 
 
 
 
515		return;
516	}
517
518	/*
519	 * SHADOWCON/PRTCON register is used for enabling timing.
520	 *
521	 * for example, once only width value of a register is set,
522	 * if the dma is started then fimd hardware could malfunction so
523	 * with protect window setting, the register fields with prefix '_F'
524	 * wouldn't be updated at vsync also but updated once unprotect window
525	 * is set.
526	 */
527
528	/* protect windows */
529	fimd_shadow_protect_win(ctx, win, true);
530
531	/* buffer start address */
532	val = (unsigned long)win_data->dma_addr;
 
533	writel(val, ctx->regs + VIDWx_BUF_START(win, 0));
534
535	/* buffer end address */
536	size = win_data->fb_width * win_data->ovl_height * (win_data->bpp >> 3);
537	val = (unsigned long)(win_data->dma_addr + size);
538	writel(val, ctx->regs + VIDWx_BUF_END(win, 0));
539
540	DRM_DEBUG_KMS("start addr = 0x%lx, end addr = 0x%lx, size = 0x%lx\n",
541			(unsigned long)win_data->dma_addr, val, size);
542	DRM_DEBUG_KMS("ovl_width = %d, ovl_height = %d\n",
543			win_data->ovl_width, win_data->ovl_height);
544
545	/* buffer size */
546	val = VIDW_BUF_SIZE_OFFSET(win_data->buf_offsize) |
547		VIDW_BUF_SIZE_PAGEWIDTH(win_data->line_size) |
548		VIDW_BUF_SIZE_OFFSET_E(win_data->buf_offsize) |
549		VIDW_BUF_SIZE_PAGEWIDTH_E(win_data->line_size);
 
 
550	writel(val, ctx->regs + VIDWx_BUF_SIZE(win, 0));
551
552	/* OSD position */
553	val = VIDOSDxA_TOPLEFT_X(win_data->offset_x) |
554		VIDOSDxA_TOPLEFT_Y(win_data->offset_y) |
555		VIDOSDxA_TOPLEFT_X_E(win_data->offset_x) |
556		VIDOSDxA_TOPLEFT_Y_E(win_data->offset_y);
557	writel(val, ctx->regs + VIDOSD_A(win));
558
559	last_x = win_data->offset_x + win_data->ovl_width;
560	if (last_x)
561		last_x--;
562	last_y = win_data->offset_y + win_data->ovl_height;
563	if (last_y)
564		last_y--;
565
566	val = VIDOSDxB_BOTRIGHT_X(last_x) | VIDOSDxB_BOTRIGHT_Y(last_y) |
567		VIDOSDxB_BOTRIGHT_X_E(last_x) | VIDOSDxB_BOTRIGHT_Y_E(last_y);
568
569	writel(val, ctx->regs + VIDOSD_B(win));
570
571	DRM_DEBUG_KMS("osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",
572			win_data->offset_x, win_data->offset_y, last_x, last_y);
573
574	/* hardware window 0 doesn't support alpha channel. */
575	if (win != 0) {
576		/* OSD alpha */
577		alpha = VIDISD14C_ALPHA1_R(0xf) |
578			VIDISD14C_ALPHA1_G(0xf) |
579			VIDISD14C_ALPHA1_B(0xf);
580
581		writel(alpha, ctx->regs + VIDOSD_C(win));
582	}
583
584	/* OSD size */
585	if (win != 3 && win != 4) {
586		u32 offset = VIDOSD_D(win);
587		if (win == 0)
588			offset = VIDOSD_C(win);
589		val = win_data->ovl_width * win_data->ovl_height;
590		writel(val, ctx->regs + offset);
591
592		DRM_DEBUG_KMS("osd size = 0x%x\n", (unsigned int)val);
593	}
594
595	fimd_win_set_pixfmt(ctx, win);
596
597	/* hardware window 0 doesn't support color key. */
598	if (win != 0)
599		fimd_win_set_colkey(ctx, win);
600
601	/* wincon */
602	val = readl(ctx->regs + WINCON(win));
603	val |= WINCONx_ENWIN;
604	writel(val, ctx->regs + WINCON(win));
605
606	/* Enable DMA channel and unprotect windows */
607	fimd_shadow_protect_win(ctx, win, false);
608
609	if (ctx->driver_data->has_shadowcon) {
610		val = readl(ctx->regs + SHADOWCON);
611		val |= SHADOWCON_CHx_ENABLE(win);
612		writel(val, ctx->regs + SHADOWCON);
613	}
614
615	win_data->enabled = true;
616}
617
618static void fimd_win_disable(struct exynos_drm_manager *mgr, int zpos)
 
619{
620	struct fimd_context *ctx = mgr->ctx;
621	struct fimd_win_data *win_data;
622	int win = zpos;
623	u32 val;
624
625	if (win == DEFAULT_ZPOS)
626		win = ctx->default_win;
627
628	if (win < 0 || win >= WINDOWS_NR)
629		return;
630
631	win_data = &ctx->win_data[win];
632
633	if (ctx->suspended) {
634		/* do not resume this window*/
635		win_data->resume = false;
636		return;
637	}
638
639	/* protect windows */
640	fimd_shadow_protect_win(ctx, win, true);
 
641
642	/* wincon */
643	val = readl(ctx->regs + WINCON(win));
644	val &= ~WINCONx_ENWIN;
645	writel(val, ctx->regs + WINCON(win));
646
647	/* unprotect windows */
648	if (ctx->driver_data->has_shadowcon) {
649		val = readl(ctx->regs + SHADOWCON);
650		val &= ~SHADOWCON_CHx_ENABLE(win);
651		writel(val, ctx->regs + SHADOWCON);
652	}
653
654	fimd_shadow_protect_win(ctx, win, false);
655
656	win_data->enabled = false;
657}
 
658
659static void fimd_clear_win(struct fimd_context *ctx, int win)
660{
661	writel(0, ctx->regs + WINCON(win));
662	writel(0, ctx->regs + VIDOSD_A(win));
663	writel(0, ctx->regs + VIDOSD_B(win));
664	writel(0, ctx->regs + VIDOSD_C(win));
665
666	if (win == 1 || win == 2)
667		writel(0, ctx->regs + VIDOSD_D(win));
668
669	fimd_shadow_protect_win(ctx, win, false);
670}
671
672static void fimd_window_suspend(struct exynos_drm_manager *mgr)
673{
674	struct fimd_context *ctx = mgr->ctx;
675	struct fimd_win_data *win_data;
676	int i;
677
678	for (i = 0; i < WINDOWS_NR; i++) {
679		win_data = &ctx->win_data[i];
680		win_data->resume = win_data->enabled;
681		if (win_data->enabled)
682			fimd_win_disable(mgr, i);
683	}
684	fimd_wait_for_vblank(mgr);
685}
686
687static void fimd_window_resume(struct exynos_drm_manager *mgr)
688{
689	struct fimd_context *ctx = mgr->ctx;
690	struct fimd_win_data *win_data;
691	int i;
 
 
692
693	for (i = 0; i < WINDOWS_NR; i++) {
694		win_data = &ctx->win_data[i];
695		win_data->enabled = win_data->resume;
696		win_data->resume = false;
697	}
698}
699
700static void fimd_apply(struct exynos_drm_manager *mgr)
701{
702	struct fimd_context *ctx = mgr->ctx;
703	struct fimd_win_data *win_data;
704	int i;
705
706	for (i = 0; i < WINDOWS_NR; i++) {
707		win_data = &ctx->win_data[i];
708		if (win_data->enabled)
709			fimd_win_commit(mgr, i);
710	}
711
712	fimd_commit(mgr);
713}
714
715static int fimd_poweron(struct exynos_drm_manager *mgr)
716{
717	struct fimd_context *ctx = mgr->ctx;
718	int ret;
 
 
 
 
 
 
 
 
 
719
720	if (!ctx->suspended)
721		return 0;
722
723	ctx->suspended = false;
 
 
724
725	pm_runtime_get_sync(ctx->dev);
726
727	ret = clk_prepare_enable(ctx->bus_clk);
728	if (ret < 0) {
729		DRM_ERROR("Failed to prepare_enable the bus clk [%d]\n", ret);
730		goto bus_clk_err;
731	}
732
733	ret = clk_prepare_enable(ctx->lcd_clk);
734	if  (ret < 0) {
735		DRM_ERROR("Failed to prepare_enable the lcd clk [%d]\n", ret);
736		goto lcd_clk_err;
737	}
738
739	/* if vblank was enabled status, enable it again. */
740	if (test_and_clear_bit(0, &ctx->irq_flags)) {
741		ret = fimd_enable_vblank(mgr);
742		if (ret) {
743			DRM_ERROR("Failed to re-enable vblank [%d]\n", ret);
744			goto enable_vblank_err;
745		}
746	}
747
748	fimd_window_resume(mgr);
749
750	fimd_apply(mgr);
751
752	return 0;
753
754enable_vblank_err:
755	clk_disable_unprepare(ctx->lcd_clk);
756lcd_clk_err:
757	clk_disable_unprepare(ctx->bus_clk);
758bus_clk_err:
759	ctx->suspended = true;
760	return ret;
761}
762
763static int fimd_poweroff(struct exynos_drm_manager *mgr)
764{
765	struct fimd_context *ctx = mgr->ctx;
766
767	if (ctx->suspended)
768		return 0;
 
769
770	/*
771	 * We need to make sure that all windows are disabled before we
772	 * suspend that connector. Otherwise we might try to scan from
773	 * a destroyed buffer later.
774	 */
775	fimd_window_suspend(mgr);
 
776
777	clk_disable_unprepare(ctx->lcd_clk);
778	clk_disable_unprepare(ctx->bus_clk);
 
 
 
779
780	pm_runtime_put_sync(ctx->dev);
781
782	ctx->suspended = true;
783	return 0;
784}
785
786static void fimd_dpms(struct exynos_drm_manager *mgr, int mode)
787{
788	DRM_DEBUG_KMS("%s, %d\n", __FILE__, mode);
 
 
 
 
 
 
 
 
 
 
789
790	switch (mode) {
791	case DRM_MODE_DPMS_ON:
792		fimd_poweron(mgr);
793		break;
794	case DRM_MODE_DPMS_STANDBY:
795	case DRM_MODE_DPMS_SUSPEND:
796	case DRM_MODE_DPMS_OFF:
797		fimd_poweroff(mgr);
798		break;
799	default:
800		DRM_DEBUG_KMS("unspecified mode %d\n", mode);
801		break;
802	}
803}
804
805static struct exynos_drm_manager_ops fimd_manager_ops = {
806	.initialize = fimd_mgr_initialize,
807	.remove = fimd_mgr_remove,
808	.dpms = fimd_dpms,
809	.mode_fixup = fimd_mode_fixup,
810	.mode_set = fimd_mode_set,
811	.commit = fimd_commit,
812	.enable_vblank = fimd_enable_vblank,
813	.disable_vblank = fimd_disable_vblank,
814	.wait_for_vblank = fimd_wait_for_vblank,
815	.win_mode_set = fimd_win_mode_set,
816	.win_commit = fimd_win_commit,
817	.win_disable = fimd_win_disable,
818};
819
820static struct exynos_drm_manager fimd_manager = {
821	.type = EXYNOS_DISPLAY_TYPE_LCD,
822	.ops = &fimd_manager_ops,
823};
824
825static irqreturn_t fimd_irq_handler(int irq, void *dev_id)
826{
827	struct fimd_context *ctx = (struct fimd_context *)dev_id;
828	u32 val;
 
829
830	val = readl(ctx->regs + VIDINTCON1);
831
832	if (val & VIDINTCON1_INT_FRAME)
833		/* VSYNC interrupt */
834		writel(VIDINTCON1_INT_FRAME, ctx->regs + VIDINTCON1);
835
836	/* check the crtc is detached already from encoder */
837	if (ctx->pipe < 0 || !ctx->drm_dev)
838		goto out;
839
840	drm_handle_vblank(ctx->drm_dev, ctx->pipe);
841	exynos_drm_crtc_finish_pageflip(ctx->drm_dev, ctx->pipe);
842
843	/* set wait vsync event to zero and wake up queue. */
844	if (atomic_read(&ctx->wait_vsync_event)) {
845		atomic_set(&ctx->wait_vsync_event, 0);
846		wake_up(&ctx->wait_vsync_queue);
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
847	}
 
848out:
849	return IRQ_HANDLED;
850}
851
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
852static int fimd_probe(struct platform_device *pdev)
853{
854	struct device *dev = &pdev->dev;
855	struct fimd_context *ctx;
 
856	struct resource *res;
857	int win;
858	int ret = -EINVAL;
859
860	if (!dev->of_node)
861		return -ENODEV;
862
863	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
864	if (!ctx)
865		return -ENOMEM;
866
867	ctx->dev = dev;
868	ctx->suspended = true;
 
869
870	if (of_property_read_bool(dev->of_node, "samsung,invert-vden"))
871		ctx->vidcon1 |= VIDCON1_INV_VDEN;
872	if (of_property_read_bool(dev->of_node, "samsung,invert-vclk"))
873		ctx->vidcon1 |= VIDCON1_INV_VCLK;
874
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
875	ctx->bus_clk = devm_clk_get(dev, "fimd");
876	if (IS_ERR(ctx->bus_clk)) {
877		dev_err(dev, "failed to get bus clock\n");
878		return PTR_ERR(ctx->bus_clk);
879	}
880
881	ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd");
882	if (IS_ERR(ctx->lcd_clk)) {
883		dev_err(dev, "failed to get lcd clock\n");
884		return PTR_ERR(ctx->lcd_clk);
885	}
886
887	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
888
889	ctx->regs = devm_ioremap_resource(dev, res);
890	if (IS_ERR(ctx->regs))
891		return PTR_ERR(ctx->regs);
892
893	res = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "vsync");
 
894	if (!res) {
895		dev_err(dev, "irq request failed.\n");
896		return -ENXIO;
897	}
898
899	ret = devm_request_irq(dev, res->start, fimd_irq_handler,
900							0, "drm_fimd", ctx);
901	if (ret) {
902		dev_err(dev, "irq request failed.\n");
903		return ret;
904	}
905
906	ctx->driver_data = drm_fimd_get_driver_data(pdev);
907	init_waitqueue_head(&ctx->wait_vsync_queue);
908	atomic_set(&ctx->wait_vsync_event, 0);
909
910	platform_set_drvdata(pdev, &fimd_manager);
 
 
 
 
 
 
 
 
 
 
 
 
911
912	fimd_manager.ctx = ctx;
913	exynos_drm_manager_register(&fimd_manager);
914
915	exynos_dpi_probe(ctx->dev);
 
916
917	pm_runtime_enable(dev);
 
 
918
919	for (win = 0; win < WINDOWS_NR; win++)
920		fimd_clear_win(ctx, win);
921
922	return 0;
923}
924
925static int fimd_remove(struct platform_device *pdev)
 
926{
927	struct exynos_drm_manager *mgr = platform_get_drvdata(pdev);
 
 
 
928
929	exynos_dpi_remove(&pdev->dev);
 
930
931	exynos_drm_manager_unregister(&fimd_manager);
 
 
 
932
933	fimd_dpms(mgr, DRM_MODE_DPMS_OFF);
 
 
 
 
934
935	pm_runtime_disable(&pdev->dev);
 
 
 
 
936
937	return 0;
938}
 
 
 
 
 
939
940struct platform_driver fimd_driver = {
941	.probe		= fimd_probe,
942	.remove		= fimd_remove,
943	.driver		= {
944		.name	= "exynos4-fb",
945		.owner	= THIS_MODULE,
 
946		.of_match_table = fimd_driver_dt_match,
947	},
948};