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v6.13.7
   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2012 Russell King
   4 *  Rewritten from the dovefb driver, and Armada510 manuals.
   5 */
   6
   7#include <linux/clk.h>
   8#include <linux/component.h>
   9#include <linux/module.h>
  10#include <linux/of.h>
  11#include <linux/platform_device.h>
  12#include <linux/property.h>
  13
  14#include <drm/drm_atomic.h>
  15#include <drm/drm_atomic_helper.h>
 
  16#include <drm/drm_probe_helper.h>
  17#include <drm/drm_vblank.h>
  18
  19#include "armada_crtc.h"
  20#include "armada_drm.h"
  21#include "armada_fb.h"
  22#include "armada_gem.h"
  23#include "armada_hw.h"
  24#include "armada_plane.h"
  25#include "armada_trace.h"
  26
  27/*
  28 * A note about interlacing.  Let's consider HDMI 1920x1080i.
  29 * The timing parameters we have from X are:
  30 *  Hact HsyA HsyI Htot  Vact VsyA VsyI Vtot
  31 *  1920 2448 2492 2640  1080 1084 1094 1125
  32 * Which get translated to:
  33 *  Hact HsyA HsyI Htot  Vact VsyA VsyI Vtot
  34 *  1920 2448 2492 2640   540  542  547  562
  35 *
  36 * This is how it is defined by CEA-861-D - line and pixel numbers are
  37 * referenced to the rising edge of VSYNC and HSYNC.  Total clocks per
  38 * line: 2640.  The odd frame, the first active line is at line 21, and
  39 * the even frame, the first active line is 584.
  40 *
  41 * LN:    560     561     562     563             567     568    569
  42 * DE:    ~~~|____________________________//__________________________
  43 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
  44 * VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________
  45 *  22 blanking lines.  VSYNC at 1320 (referenced to the HSYNC rising edge).
  46 *
  47 * LN:    1123   1124    1125      1               5       6      7
  48 * DE:    ~~~|____________________________//__________________________
  49 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
  50 * VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________
  51 *  23 blanking lines
  52 *
  53 * The Armada LCD Controller line and pixel numbers are, like X timings,
  54 * referenced to the top left of the active frame.
  55 *
  56 * So, translating these to our LCD controller:
  57 *  Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128.
  58 *  Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448.
  59 * Note: Vsync front porch remains constant!
  60 *
  61 * if (odd_frame) {
  62 *   vtotal = mode->crtc_vtotal + 1;
  63 *   vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1;
  64 *   vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2
  65 * } else {
  66 *   vtotal = mode->crtc_vtotal;
  67 *   vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay;
  68 *   vhorizpos = mode->crtc_hsync_start;
  69 * }
  70 * vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end;
  71 *
  72 * So, we need to reprogram these registers on each vsync event:
  73 *  LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL
  74 *
  75 * Note: we do not use the frame done interrupts because these appear
  76 * to happen too early, and lead to jitter on the display (presumably
  77 * they occur at the end of the last active line, before the vsync back
  78 * porch, which we're reprogramming.)
  79 */
  80
  81void
  82armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs)
  83{
  84	while (regs->offset != ~0) {
  85		void __iomem *reg = dcrtc->base + regs->offset;
  86		uint32_t val;
  87
  88		val = regs->mask;
  89		if (val != 0)
  90			val &= readl_relaxed(reg);
  91		writel_relaxed(val | regs->val, reg);
  92		++regs;
  93	}
  94}
  95
  96static void armada_drm_crtc_update(struct armada_crtc *dcrtc, bool enable)
  97{
  98	uint32_t dumb_ctrl;
  99
 100	dumb_ctrl = dcrtc->cfg_dumb_ctrl;
 101
 102	if (enable)
 103		dumb_ctrl |= CFG_DUMB_ENA;
 104
 105	/*
 106	 * When the dumb interface isn't in DUMB24_RGB888_0 mode, it might
 107	 * be using SPI or GPIO.  If we set this to DUMB_BLANK, we will
 108	 * force LCD_D[23:0] to output blank color, overriding the GPIO or
 109	 * SPI usage.  So leave it as-is unless in DUMB24_RGB888_0 mode.
 110	 */
 111	if (!enable && (dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) {
 112		dumb_ctrl &= ~DUMB_MASK;
 113		dumb_ctrl |= DUMB_BLANK;
 114	}
 115
 116	armada_updatel(dumb_ctrl,
 117		       ~(CFG_INV_CSYNC | CFG_INV_HSYNC | CFG_INV_VSYNC),
 118		       dcrtc->base + LCD_SPU_DUMB_CTRL);
 119}
 120
 121static void armada_drm_crtc_queue_state_event(struct drm_crtc *crtc)
 122{
 123	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 124	struct drm_pending_vblank_event *event;
 125
 126	/* If we have an event, we need vblank events enabled */
 127	event = xchg(&crtc->state->event, NULL);
 128	if (event) {
 129		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 130		dcrtc->event = event;
 131	}
 132}
 133
 134static void armada_drm_update_gamma(struct drm_crtc *crtc)
 135{
 136	struct drm_property_blob *blob = crtc->state->gamma_lut;
 137	void __iomem *base = drm_to_armada_crtc(crtc)->base;
 138	int i;
 139
 140	if (blob) {
 141		struct drm_color_lut *lut = blob->data;
 142
 143		armada_updatel(CFG_CSB_256x8, CFG_CSB_256x8 | CFG_PDWN256x8,
 144			       base + LCD_SPU_SRAM_PARA1);
 145
 146		for (i = 0; i < 256; i++) {
 147			writel_relaxed(drm_color_lut_extract(lut[i].red, 8),
 148				       base + LCD_SPU_SRAM_WRDAT);
 149			writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_YR,
 150				       base + LCD_SPU_SRAM_CTRL);
 151			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 152			writel_relaxed(drm_color_lut_extract(lut[i].green, 8),
 153				       base + LCD_SPU_SRAM_WRDAT);
 154			writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_UG,
 155				       base + LCD_SPU_SRAM_CTRL);
 156			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 157			writel_relaxed(drm_color_lut_extract(lut[i].blue, 8),
 158				       base + LCD_SPU_SRAM_WRDAT);
 159			writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_VB,
 160				       base + LCD_SPU_SRAM_CTRL);
 161			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 162		}
 163		armada_updatel(CFG_GAMMA_ENA, CFG_GAMMA_ENA,
 164			       base + LCD_SPU_DMA_CTRL0);
 165	} else {
 166		armada_updatel(0, CFG_GAMMA_ENA, base + LCD_SPU_DMA_CTRL0);
 167		armada_updatel(CFG_PDWN256x8, CFG_CSB_256x8 | CFG_PDWN256x8,
 168			       base + LCD_SPU_SRAM_PARA1);
 169	}
 170}
 171
 172static enum drm_mode_status armada_drm_crtc_mode_valid(struct drm_crtc *crtc,
 173	const struct drm_display_mode *mode)
 174{
 175	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 176
 177	if (mode->vscan > 1)
 178		return MODE_NO_VSCAN;
 179
 180	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 181		return MODE_NO_DBLESCAN;
 182
 183	if (mode->flags & DRM_MODE_FLAG_HSKEW)
 184		return MODE_H_ILLEGAL;
 185
 186	/* We can't do interlaced modes if we don't have the SPU_ADV_REG */
 187	if (!dcrtc->variant->has_spu_adv_reg &&
 188	    mode->flags & DRM_MODE_FLAG_INTERLACE)
 189		return MODE_NO_INTERLACE;
 190
 191	if (mode->flags & (DRM_MODE_FLAG_BCAST | DRM_MODE_FLAG_PIXMUX |
 192			   DRM_MODE_FLAG_CLKDIV2))
 193		return MODE_BAD;
 194
 195	return MODE_OK;
 196}
 197
 198/* The mode_config.mutex will be held for this call */
 199static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 200	const struct drm_display_mode *mode, struct drm_display_mode *adj)
 201{
 202	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 203	int ret;
 204
 205	/*
 206	 * Set CRTC modesetting parameters for the adjusted mode.  This is
 207	 * applied after the connectors, bridges, and encoders have fixed up
 208	 * this mode, as described above drm_atomic_helper_check_modeset().
 209	 */
 210	drm_mode_set_crtcinfo(adj, CRTC_INTERLACE_HALVE_V);
 211
 212	/*
 213	 * Validate the adjusted mode in case an encoder/bridge has set
 214	 * something we don't support.
 215	 */
 216	if (armada_drm_crtc_mode_valid(crtc, adj) != MODE_OK)
 217		return false;
 218
 219	/* Check whether the display mode is possible */
 220	ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL);
 221	if (ret)
 222		return false;
 223
 224	return true;
 225}
 226
 227/* These are locked by dev->vbl_lock */
 228static void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask)
 229{
 230	if (dcrtc->irq_ena & mask) {
 231		dcrtc->irq_ena &= ~mask;
 232		writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 233	}
 234}
 235
 236static void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask)
 237{
 238	if ((dcrtc->irq_ena & mask) != mask) {
 239		dcrtc->irq_ena |= mask;
 240		writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 241		if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask)
 242			writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 243	}
 244}
 245
 246static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
 247{
 248	struct drm_pending_vblank_event *event;
 249	void __iomem *base = dcrtc->base;
 250
 251	if (stat & DMA_FF_UNDERFLOW)
 252		DRM_ERROR("video underflow on crtc %u\n", dcrtc->num);
 253	if (stat & GRA_FF_UNDERFLOW)
 254		DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num);
 255
 256	if (stat & VSYNC_IRQ)
 257		drm_crtc_handle_vblank(&dcrtc->crtc);
 258
 259	spin_lock(&dcrtc->irq_lock);
 260	if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) {
 261		int i = stat & GRA_FRAME_IRQ0 ? 0 : 1;
 262		uint32_t val;
 263
 264		writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH);
 265		writel_relaxed(dcrtc->v[i].spu_v_h_total,
 266			       base + LCD_SPUT_V_H_TOTAL);
 267
 268		val = readl_relaxed(base + LCD_SPU_ADV_REG);
 269		val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN);
 270		val |= dcrtc->v[i].spu_adv_reg;
 271		writel_relaxed(val, base + LCD_SPU_ADV_REG);
 272	}
 273
 274	if (stat & dcrtc->irq_ena & DUMB_FRAMEDONE) {
 275		if (dcrtc->update_pending) {
 276			armada_drm_crtc_update_regs(dcrtc, dcrtc->regs);
 277			dcrtc->update_pending = false;
 278		}
 279		if (dcrtc->cursor_update) {
 280			writel_relaxed(dcrtc->cursor_hw_pos,
 281				       base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 282			writel_relaxed(dcrtc->cursor_hw_sz,
 283				       base + LCD_SPU_HWC_HPXL_VLN);
 284			armada_updatel(CFG_HWC_ENA,
 285				       CFG_HWC_ENA | CFG_HWC_1BITMOD |
 286				       CFG_HWC_1BITENA,
 287				       base + LCD_SPU_DMA_CTRL0);
 288			dcrtc->cursor_update = false;
 289		}
 290		armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
 291	}
 292	spin_unlock(&dcrtc->irq_lock);
 293
 294	if (stat & VSYNC_IRQ && !dcrtc->update_pending) {
 295		event = xchg(&dcrtc->event, NULL);
 296		if (event) {
 297			spin_lock(&dcrtc->crtc.dev->event_lock);
 298			drm_crtc_send_vblank_event(&dcrtc->crtc, event);
 299			spin_unlock(&dcrtc->crtc.dev->event_lock);
 300			drm_crtc_vblank_put(&dcrtc->crtc);
 301		}
 302	}
 303}
 304
 305static irqreturn_t armada_drm_irq(int irq, void *arg)
 306{
 307	struct armada_crtc *dcrtc = arg;
 308	u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
 309
 310	/*
 311	 * Reading the ISR appears to clear bits provided CLEAN_SPU_IRQ_ISR
 312	 * is set.  Writing has some other effect to acknowledge the IRQ -
 313	 * without this, we only get a single IRQ.
 314	 */
 315	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 316
 317	trace_armada_drm_irq(&dcrtc->crtc, stat);
 318
 319	/* Mask out those interrupts we haven't enabled */
 320	v = stat & dcrtc->irq_ena;
 321
 322	if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
 323		armada_drm_crtc_irq(dcrtc, stat);
 324		return IRQ_HANDLED;
 325	}
 326	return IRQ_NONE;
 327}
 328
 329/* The mode_config.mutex will be held for this call */
 330static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 331{
 332	struct drm_display_mode *adj = &crtc->state->adjusted_mode;
 333	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 334	struct armada_regs regs[17];
 335	uint32_t lm, rm, tm, bm, val, sclk;
 336	unsigned long flags;
 337	unsigned i;
 338	bool interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE);
 339
 340	i = 0;
 341	rm = adj->crtc_hsync_start - adj->crtc_hdisplay;
 342	lm = adj->crtc_htotal - adj->crtc_hsync_end;
 343	bm = adj->crtc_vsync_start - adj->crtc_vdisplay;
 344	tm = adj->crtc_vtotal - adj->crtc_vsync_end;
 345
 346	DRM_DEBUG_KMS("[CRTC:%d:%s] mode " DRM_MODE_FMT "\n",
 347		      crtc->base.id, crtc->name, DRM_MODE_ARG(adj));
 348	DRM_DEBUG_KMS("lm %d rm %d tm %d bm %d\n", lm, rm, tm, bm);
 349
 350	/* Now compute the divider for real */
 351	dcrtc->variant->compute_clock(dcrtc, adj, &sclk);
 352
 353	armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV);
 354
 355	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 356
 357	dcrtc->interlaced = interlaced;
 358	/* Even interlaced/progressive frame */
 359	dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 |
 360				    adj->crtc_htotal;
 361	dcrtc->v[1].spu_v_porch = tm << 16 | bm;
 362	val = adj->crtc_hsync_start;
 363	dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
 364
 365	if (interlaced) {
 366		/* Odd interlaced frame */
 367		val -= adj->crtc_htotal / 2;
 368		dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
 369		dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total +
 370						(1 << 16);
 371		dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1;
 372	} else {
 373		dcrtc->v[0] = dcrtc->v[1];
 374	}
 375
 376	val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay;
 377
 378	armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE);
 379	armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH);
 380	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH);
 381	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total,
 382			   LCD_SPUT_V_H_TOTAL);
 383
 384	if (dcrtc->variant->has_spu_adv_reg)
 385		armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg,
 386				     ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF |
 387				     ADV_VSYNCOFFEN, LCD_SPU_ADV_REG);
 388
 389	val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0;
 390	armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1);
 391
 392	/*
 393	 * The documentation doesn't indicate what the normal state of
 394	 * the sync signals are.  Sebastian Hesselbart kindly probed
 395	 * these signals on his board to determine their state.
 396	 *
 397	 * The non-inverted state of the sync signals is active high.
 398	 * Setting these bits makes the appropriate signal active low.
 399	 */
 400	val = 0;
 401	if (adj->flags & DRM_MODE_FLAG_NCSYNC)
 402		val |= CFG_INV_CSYNC;
 403	if (adj->flags & DRM_MODE_FLAG_NHSYNC)
 404		val |= CFG_INV_HSYNC;
 405	if (adj->flags & DRM_MODE_FLAG_NVSYNC)
 406		val |= CFG_INV_VSYNC;
 407	armada_reg_queue_mod(regs, i, val, CFG_INV_CSYNC | CFG_INV_HSYNC |
 408			     CFG_INV_VSYNC, LCD_SPU_DUMB_CTRL);
 409	armada_reg_queue_end(regs, i);
 410
 411	armada_drm_crtc_update_regs(dcrtc, regs);
 412	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 413}
 414
 415static int armada_drm_crtc_atomic_check(struct drm_crtc *crtc,
 416					struct drm_atomic_state *state)
 417{
 418	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 419									  crtc);
 420	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 421
 422	if (crtc_state->gamma_lut && drm_color_lut_size(crtc_state->gamma_lut) != 256)
 423		return -EINVAL;
 424
 425	if (crtc_state->color_mgmt_changed)
 426		crtc_state->planes_changed = true;
 427
 428	return 0;
 429}
 430
 431static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc,
 432					 struct drm_atomic_state *state)
 433{
 434	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 435									  crtc);
 436	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 437
 438	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 439
 440	if (crtc_state->color_mgmt_changed)
 441		armada_drm_update_gamma(crtc);
 442
 443	dcrtc->regs_idx = 0;
 444	dcrtc->regs = dcrtc->atomic_regs;
 445}
 446
 447static void armada_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 448					 struct drm_atomic_state *state)
 449{
 450	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
 451									  crtc);
 452	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 453
 454	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 455
 456	armada_reg_queue_end(dcrtc->regs, dcrtc->regs_idx);
 457
 458	/*
 459	 * If we aren't doing a full modeset, then we need to queue
 460	 * the event here.
 461	 */
 462	if (!drm_atomic_crtc_needs_modeset(crtc_state)) {
 463		dcrtc->update_pending = true;
 464		armada_drm_crtc_queue_state_event(crtc);
 465		spin_lock_irq(&dcrtc->irq_lock);
 466		armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
 467		spin_unlock_irq(&dcrtc->irq_lock);
 468	} else {
 469		spin_lock_irq(&dcrtc->irq_lock);
 470		armada_drm_crtc_update_regs(dcrtc, dcrtc->regs);
 471		spin_unlock_irq(&dcrtc->irq_lock);
 472	}
 473}
 474
 475static void armada_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 476					   struct drm_atomic_state *state)
 477{
 478	struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state,
 479									 crtc);
 480	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 481	struct drm_pending_vblank_event *event;
 482
 483	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 484
 485	if (old_state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
 486		drm_crtc_vblank_put(crtc);
 487
 488	drm_crtc_vblank_off(crtc);
 489	armada_drm_crtc_update(dcrtc, false);
 490
 491	if (!crtc->state->active) {
 492		/*
 493		 * This modeset will be leaving the CRTC disabled, so
 494		 * call the backend to disable upstream clocks etc.
 495		 */
 496		if (dcrtc->variant->disable)
 497			dcrtc->variant->disable(dcrtc);
 498
 499		/*
 500		 * We will not receive any further vblank events.
 501		 * Send the flip_done event manually.
 502		 */
 503		event = crtc->state->event;
 504		crtc->state->event = NULL;
 505		if (event) {
 506			spin_lock_irq(&crtc->dev->event_lock);
 507			drm_crtc_send_vblank_event(crtc, event);
 508			spin_unlock_irq(&crtc->dev->event_lock);
 509		}
 510	}
 511}
 512
 513static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 514					  struct drm_atomic_state *state)
 515{
 516	struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state,
 517									 crtc);
 518	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 519
 520	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 521
 522	if (!old_state->active) {
 523		/*
 524		 * This modeset is enabling the CRTC after it having
 525		 * been disabled.  Reverse the call to ->disable in
 526		 * the atomic_disable().
 527		 */
 528		if (dcrtc->variant->enable)
 529			dcrtc->variant->enable(dcrtc, &crtc->state->adjusted_mode);
 530	}
 531	armada_drm_crtc_update(dcrtc, true);
 532	drm_crtc_vblank_on(crtc);
 533
 534	if (crtc->state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
 535		WARN_ON(drm_crtc_vblank_get(crtc));
 536
 537	armada_drm_crtc_queue_state_event(crtc);
 538}
 539
 540static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = {
 541	.mode_valid	= armada_drm_crtc_mode_valid,
 542	.mode_fixup	= armada_drm_crtc_mode_fixup,
 543	.mode_set_nofb	= armada_drm_crtc_mode_set_nofb,
 544	.atomic_check	= armada_drm_crtc_atomic_check,
 545	.atomic_begin	= armada_drm_crtc_atomic_begin,
 546	.atomic_flush	= armada_drm_crtc_atomic_flush,
 547	.atomic_disable	= armada_drm_crtc_atomic_disable,
 548	.atomic_enable	= armada_drm_crtc_atomic_enable,
 549};
 550
 551static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix,
 552	unsigned stride, unsigned width, unsigned height)
 553{
 554	uint32_t addr;
 555	unsigned y;
 556
 557	addr = SRAM_HWC32_RAM1;
 558	for (y = 0; y < height; y++) {
 559		uint32_t *p = &pix[y * stride];
 560		unsigned x;
 561
 562		for (x = 0; x < width; x++, p++) {
 563			uint32_t val = *p;
 564
 565			/*
 566			 * In "ARGB888" (HWC32) mode, writing to the SRAM
 567			 * requires these bits to contain:
 568			 * 31:24 = alpha 23:16 = blue 15:8 = green 7:0 = red
 569			 * So, it's actually ABGR8888.  This is independent
 570			 * of the SWAPRB bits in DMA control register 0.
 571			 */
 572			val = (val & 0xff00ff00) |
 573			      (val & 0x000000ff) << 16 |
 574			      (val & 0x00ff0000) >> 16;
 575
 576			writel_relaxed(val,
 577				       base + LCD_SPU_SRAM_WRDAT);
 578			writel_relaxed(addr | SRAM_WRITE,
 579				       base + LCD_SPU_SRAM_CTRL);
 580			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 581			addr += 1;
 582			if ((addr & 0x00ff) == 0)
 583				addr += 0xf00;
 584			if ((addr & 0x30ff) == 0)
 585				addr = SRAM_HWC32_RAM2;
 586		}
 587	}
 588}
 589
 590static void armada_drm_crtc_cursor_tran(void __iomem *base)
 591{
 592	unsigned addr;
 593
 594	for (addr = 0; addr < 256; addr++) {
 595		/* write the default value */
 596		writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT);
 597		writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN,
 598			       base + LCD_SPU_SRAM_CTRL);
 599	}
 600}
 601
 602static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload)
 603{
 604	uint32_t xoff, xscr, w = dcrtc->cursor_w, s;
 605	uint32_t yoff, yscr, h = dcrtc->cursor_h;
 606	uint32_t para1;
 607
 608	/*
 609	 * Calculate the visible width and height of the cursor,
 610	 * screen position, and the position in the cursor bitmap.
 611	 */
 612	if (dcrtc->cursor_x < 0) {
 613		xoff = -dcrtc->cursor_x;
 614		xscr = 0;
 615		w -= min(xoff, w);
 616	} else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) {
 617		xoff = 0;
 618		xscr = dcrtc->cursor_x;
 619		w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0);
 620	} else {
 621		xoff = 0;
 622		xscr = dcrtc->cursor_x;
 623	}
 624
 625	if (dcrtc->cursor_y < 0) {
 626		yoff = -dcrtc->cursor_y;
 627		yscr = 0;
 628		h -= min(yoff, h);
 629	} else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) {
 630		yoff = 0;
 631		yscr = dcrtc->cursor_y;
 632		h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0);
 633	} else {
 634		yoff = 0;
 635		yscr = dcrtc->cursor_y;
 636	}
 637
 638	/* On interlaced modes, the vertical cursor size must be halved */
 639	s = dcrtc->cursor_w;
 640	if (dcrtc->interlaced) {
 641		s *= 2;
 642		yscr /= 2;
 643		h /= 2;
 644	}
 645
 646	if (!dcrtc->cursor_obj || !h || !w) {
 647		spin_lock_irq(&dcrtc->irq_lock);
 648		dcrtc->cursor_update = false;
 649		armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
 650		spin_unlock_irq(&dcrtc->irq_lock);
 651		return 0;
 652	}
 653
 654	spin_lock_irq(&dcrtc->irq_lock);
 655	para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1);
 656	armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32,
 657		       dcrtc->base + LCD_SPU_SRAM_PARA1);
 658	spin_unlock_irq(&dcrtc->irq_lock);
 659
 660	/*
 661	 * Initialize the transparency if the SRAM was powered down.
 662	 * We must also reload the cursor data as well.
 663	 */
 664	if (!(para1 & CFG_CSB_256x32)) {
 665		armada_drm_crtc_cursor_tran(dcrtc->base);
 666		reload = true;
 667	}
 668
 669	if (dcrtc->cursor_hw_sz != (h << 16 | w)) {
 670		spin_lock_irq(&dcrtc->irq_lock);
 671		dcrtc->cursor_update = false;
 672		armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
 673		spin_unlock_irq(&dcrtc->irq_lock);
 674		reload = true;
 675	}
 676	if (reload) {
 677		struct armada_gem_object *obj = dcrtc->cursor_obj;
 678		uint32_t *pix;
 679		/* Set the top-left corner of the cursor image */
 680		pix = obj->addr;
 681		pix += yoff * s + xoff;
 682		armada_load_cursor_argb(dcrtc->base, pix, s, w, h);
 683	}
 684
 685	/* Reload the cursor position, size and enable in the IRQ handler */
 686	spin_lock_irq(&dcrtc->irq_lock);
 687	dcrtc->cursor_hw_pos = yscr << 16 | xscr;
 688	dcrtc->cursor_hw_sz = h << 16 | w;
 689	dcrtc->cursor_update = true;
 690	armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
 691	spin_unlock_irq(&dcrtc->irq_lock);
 692
 693	return 0;
 694}
 695
 696static void cursor_update(void *data)
 697{
 698	armada_drm_crtc_cursor_update(data, true);
 699}
 700
 701static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc,
 702	struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h)
 703{
 704	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 705	struct armada_gem_object *obj = NULL;
 706	int ret;
 707
 708	/* If no cursor support, replicate drm's return value */
 709	if (!dcrtc->variant->has_spu_adv_reg)
 710		return -ENXIO;
 711
 712	if (handle && w > 0 && h > 0) {
 713		/* maximum size is 64x32 or 32x64 */
 714		if (w > 64 || h > 64 || (w > 32 && h > 32))
 715			return -ENOMEM;
 716
 717		obj = armada_gem_object_lookup(file, handle);
 718		if (!obj)
 719			return -ENOENT;
 720
 721		/* Must be a kernel-mapped object */
 722		if (!obj->addr) {
 723			drm_gem_object_put(&obj->obj);
 724			return -EINVAL;
 725		}
 726
 727		if (obj->obj.size < w * h * 4) {
 728			DRM_ERROR("buffer is too small\n");
 729			drm_gem_object_put(&obj->obj);
 730			return -ENOMEM;
 731		}
 732	}
 733
 734	if (dcrtc->cursor_obj) {
 735		dcrtc->cursor_obj->update = NULL;
 736		dcrtc->cursor_obj->update_data = NULL;
 737		drm_gem_object_put(&dcrtc->cursor_obj->obj);
 738	}
 739	dcrtc->cursor_obj = obj;
 740	dcrtc->cursor_w = w;
 741	dcrtc->cursor_h = h;
 742	ret = armada_drm_crtc_cursor_update(dcrtc, true);
 743	if (obj) {
 744		obj->update_data = dcrtc;
 745		obj->update = cursor_update;
 746	}
 747
 748	return ret;
 749}
 750
 751static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 752{
 753	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 754	int ret;
 755
 756	/* If no cursor support, replicate drm's return value */
 757	if (!dcrtc->variant->has_spu_adv_reg)
 758		return -EFAULT;
 759
 760	dcrtc->cursor_x = x;
 761	dcrtc->cursor_y = y;
 762	ret = armada_drm_crtc_cursor_update(dcrtc, false);
 763
 764	return ret;
 765}
 766
 767static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
 768{
 769	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 770	struct armada_private *priv = drm_to_armada_dev(crtc->dev);
 771
 772	if (dcrtc->cursor_obj)
 773		drm_gem_object_put(&dcrtc->cursor_obj->obj);
 774
 775	priv->dcrtc[dcrtc->num] = NULL;
 776	drm_crtc_cleanup(&dcrtc->crtc);
 777
 778	if (dcrtc->variant->disable)
 779		dcrtc->variant->disable(dcrtc);
 780
 781	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA);
 782
 783	of_node_put(dcrtc->crtc.port);
 784
 785	kfree(dcrtc);
 786}
 787
 788static int armada_drm_crtc_late_register(struct drm_crtc *crtc)
 789{
 790	if (IS_ENABLED(CONFIG_DEBUG_FS))
 791		armada_drm_crtc_debugfs_init(drm_to_armada_crtc(crtc));
 792
 793	return 0;
 794}
 795
 796/* These are called under the vbl_lock. */
 797static int armada_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 798{
 799	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 800	unsigned long flags;
 801
 802	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 803	armada_drm_crtc_enable_irq(dcrtc, VSYNC_IRQ_ENA);
 804	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 805	return 0;
 806}
 807
 808static void armada_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 809{
 810	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 811	unsigned long flags;
 812
 813	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 814	armada_drm_crtc_disable_irq(dcrtc, VSYNC_IRQ_ENA);
 815	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 816}
 817
 818static const struct drm_crtc_funcs armada_crtc_funcs = {
 819	.reset		= drm_atomic_helper_crtc_reset,
 820	.cursor_set	= armada_drm_crtc_cursor_set,
 821	.cursor_move	= armada_drm_crtc_cursor_move,
 822	.destroy	= armada_drm_crtc_destroy,
 
 823	.set_config	= drm_atomic_helper_set_config,
 824	.page_flip	= drm_atomic_helper_page_flip,
 825	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 826	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 827	.late_register	= armada_drm_crtc_late_register,
 828	.enable_vblank	= armada_drm_crtc_enable_vblank,
 829	.disable_vblank	= armada_drm_crtc_disable_vblank,
 830};
 831
 832int armada_crtc_select_clock(struct armada_crtc *dcrtc,
 833			     struct armada_clk_result *res,
 834			     const struct armada_clocking_params *params,
 835			     struct clk *clks[], size_t num_clks,
 836			     unsigned long desired_khz)
 837{
 838	unsigned long desired_hz = desired_khz * 1000;
 839	unsigned long desired_clk_hz;	// requested clk input
 840	unsigned long real_clk_hz;	// actual clk input
 841	unsigned long real_hz;		// actual pixel clk
 842	unsigned long permillage;
 843	struct clk *clk;
 844	u32 div;
 845	int i;
 846
 847	DRM_DEBUG_KMS("[CRTC:%u:%s] desired clock=%luHz\n",
 848		      dcrtc->crtc.base.id, dcrtc->crtc.name, desired_hz);
 849
 850	for (i = 0; i < num_clks; i++) {
 851		clk = clks[i];
 852		if (!clk)
 853			continue;
 854
 855		if (params->settable & BIT(i)) {
 856			real_clk_hz = clk_round_rate(clk, desired_hz);
 857			desired_clk_hz = desired_hz;
 858		} else {
 859			real_clk_hz = clk_get_rate(clk);
 860			desired_clk_hz = real_clk_hz;
 861		}
 862
 863		/* If the clock can do exactly the desired rate, we're done */
 864		if (real_clk_hz == desired_hz) {
 865			real_hz = real_clk_hz;
 866			div = 1;
 867			goto found;
 868		}
 869
 870		/* Calculate the divider - if invalid, we can't do this rate */
 871		div = DIV_ROUND_CLOSEST(real_clk_hz, desired_hz);
 872		if (div == 0 || div > params->div_max)
 873			continue;
 874
 875		/* Calculate the actual rate - HDMI requires -0.6%..+0.5% */
 876		real_hz = DIV_ROUND_CLOSEST(real_clk_hz, div);
 877
 878		DRM_DEBUG_KMS("[CRTC:%u:%s] clk=%u %luHz div=%u real=%luHz\n",
 879			dcrtc->crtc.base.id, dcrtc->crtc.name,
 880			i, real_clk_hz, div, real_hz);
 881
 882		/* Avoid repeated division */
 883		if (real_hz < desired_hz) {
 884			permillage = real_hz / desired_khz;
 885			if (permillage < params->permillage_min)
 886				continue;
 887		} else {
 888			permillage = DIV_ROUND_UP(real_hz, desired_khz);
 889			if (permillage > params->permillage_max)
 890				continue;
 891		}
 892		goto found;
 893	}
 894
 895	return -ERANGE;
 896
 897found:
 898	DRM_DEBUG_KMS("[CRTC:%u:%s] selected clk=%u %luHz div=%u real=%luHz\n",
 899		dcrtc->crtc.base.id, dcrtc->crtc.name,
 900		i, real_clk_hz, div, real_hz);
 901
 902	res->desired_clk_hz = desired_clk_hz;
 903	res->clk = clk;
 904	res->div = div;
 905
 906	return i;
 907}
 908
 909static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev,
 910	struct resource *res, int irq, const struct armada_variant *variant,
 911	struct device_node *port)
 912{
 913	struct armada_private *priv = drm_to_armada_dev(drm);
 914	struct armada_crtc *dcrtc;
 915	struct drm_plane *primary;
 916	void __iomem *base;
 917	int ret;
 918
 919	base = devm_ioremap_resource(dev, res);
 920	if (IS_ERR(base))
 921		return PTR_ERR(base);
 922
 923	dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL);
 924	if (!dcrtc) {
 925		DRM_ERROR("failed to allocate Armada crtc\n");
 926		return -ENOMEM;
 927	}
 928
 929	if (dev != drm->dev)
 930		dev_set_drvdata(dev, dcrtc);
 931
 932	dcrtc->variant = variant;
 933	dcrtc->base = base;
 934	dcrtc->num = drm->mode_config.num_crtc;
 935	dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0;
 936	dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24;
 937	spin_lock_init(&dcrtc->irq_lock);
 938	dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR;
 939
 940	/* Initialize some registers which we don't otherwise set */
 941	writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV);
 942	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR);
 943	writel_relaxed(dcrtc->spu_iopad_ctrl,
 944		       dcrtc->base + LCD_SPU_IOPAD_CONTROL);
 945	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0);
 946	writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 |
 947		       CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 |
 948		       CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
 949	writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1);
 950	writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 951	readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
 952	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 953
 954	ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc",
 955			       dcrtc);
 956	if (ret < 0)
 957		goto err_crtc;
 958
 959	if (dcrtc->variant->init) {
 960		ret = dcrtc->variant->init(dcrtc, dev);
 961		if (ret)
 962			goto err_crtc;
 963	}
 964
 965	/* Ensure AXI pipeline is enabled */
 966	armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0);
 967
 968	priv->dcrtc[dcrtc->num] = dcrtc;
 969
 970	dcrtc->crtc.port = port;
 971
 972	primary = kzalloc(sizeof(*primary), GFP_KERNEL);
 973	if (!primary) {
 974		ret = -ENOMEM;
 975		goto err_crtc;
 976	}
 977
 978	ret = armada_drm_primary_plane_init(drm, primary);
 979	if (ret) {
 980		kfree(primary);
 981		goto err_crtc;
 982	}
 983
 984	ret = drm_crtc_init_with_planes(drm, &dcrtc->crtc, primary, NULL,
 985					&armada_crtc_funcs, NULL);
 986	if (ret)
 987		goto err_crtc_init;
 988
 989	drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs);
 990
 991	ret = drm_mode_crtc_set_gamma_size(&dcrtc->crtc, 256);
 992	if (ret)
 993		return ret;
 994
 995	drm_crtc_enable_color_mgmt(&dcrtc->crtc, 0, false, 256);
 996
 997	return armada_overlay_plane_create(drm, 1 << dcrtc->num);
 998
 999err_crtc_init:
1000	primary->funcs->destroy(primary);
1001err_crtc:
1002	kfree(dcrtc);
1003
1004	return ret;
1005}
1006
1007static int
1008armada_lcd_bind(struct device *dev, struct device *master, void *data)
1009{
1010	struct platform_device *pdev = to_platform_device(dev);
1011	struct drm_device *drm = data;
1012	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1013	int irq = platform_get_irq(pdev, 0);
1014	const struct armada_variant *variant;
1015	struct device_node *port = NULL;
1016	struct device_node *np, *parent = dev->of_node;
1017
1018	if (irq < 0)
1019		return irq;
1020
 
 
1021
1022	variant = device_get_match_data(dev);
1023	if (!variant)
1024		return -ENXIO;
 
 
 
 
 
 
 
 
 
1025
1026	if (parent) {
1027		np = of_get_child_by_name(parent, "ports");
1028		if (np)
1029			parent = np;
1030		port = of_get_child_by_name(parent, "port");
1031		of_node_put(np);
1032		if (!port) {
1033			dev_err(dev, "no port node found in %pOF\n", parent);
1034			return -ENXIO;
1035		}
 
 
1036	}
1037
1038	return armada_drm_crtc_create(drm, dev, res, irq, variant, port);
1039}
1040
1041static void
1042armada_lcd_unbind(struct device *dev, struct device *master, void *data)
1043{
1044	struct armada_crtc *dcrtc = dev_get_drvdata(dev);
1045
1046	armada_drm_crtc_destroy(&dcrtc->crtc);
1047}
1048
1049static const struct component_ops armada_lcd_ops = {
1050	.bind = armada_lcd_bind,
1051	.unbind = armada_lcd_unbind,
1052};
1053
1054static int armada_lcd_probe(struct platform_device *pdev)
1055{
1056	return component_add(&pdev->dev, &armada_lcd_ops);
1057}
1058
1059static void armada_lcd_remove(struct platform_device *pdev)
1060{
1061	component_del(&pdev->dev, &armada_lcd_ops);
 
1062}
1063
1064static const struct of_device_id armada_lcd_of_match[] = {
1065	{
1066		.compatible	= "marvell,dove-lcd",
1067		.data		= &armada510_ops,
1068	},
1069	{}
1070};
1071MODULE_DEVICE_TABLE(of, armada_lcd_of_match);
1072
1073static const struct platform_device_id armada_lcd_platform_ids[] = {
1074	{
1075		.name		= "armada-lcd",
1076		.driver_data	= (unsigned long)&armada510_ops,
1077	}, {
1078		.name		= "armada-510-lcd",
1079		.driver_data	= (unsigned long)&armada510_ops,
1080	},
1081	{ },
1082};
1083MODULE_DEVICE_TABLE(platform, armada_lcd_platform_ids);
1084
1085struct platform_driver armada_lcd_platform_driver = {
1086	.probe	= armada_lcd_probe,
1087	.remove = armada_lcd_remove,
1088	.driver = {
1089		.name	= "armada-lcd",
1090		.owner	=  THIS_MODULE,
1091		.of_match_table = armada_lcd_of_match,
1092	},
1093	.id_table = armada_lcd_platform_ids,
1094};
v5.4
   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Copyright (C) 2012 Russell King
   4 *  Rewritten from the dovefb driver, and Armada510 manuals.
   5 */
   6
   7#include <linux/clk.h>
   8#include <linux/component.h>
   9#include <linux/module.h>
  10#include <linux/of_device.h>
  11#include <linux/platform_device.h>
 
  12
  13#include <drm/drm_atomic.h>
  14#include <drm/drm_atomic_helper.h>
  15#include <drm/drm_plane_helper.h>
  16#include <drm/drm_probe_helper.h>
  17#include <drm/drm_vblank.h>
  18
  19#include "armada_crtc.h"
  20#include "armada_drm.h"
  21#include "armada_fb.h"
  22#include "armada_gem.h"
  23#include "armada_hw.h"
  24#include "armada_plane.h"
  25#include "armada_trace.h"
  26
  27/*
  28 * A note about interlacing.  Let's consider HDMI 1920x1080i.
  29 * The timing parameters we have from X are:
  30 *  Hact HsyA HsyI Htot  Vact VsyA VsyI Vtot
  31 *  1920 2448 2492 2640  1080 1084 1094 1125
  32 * Which get translated to:
  33 *  Hact HsyA HsyI Htot  Vact VsyA VsyI Vtot
  34 *  1920 2448 2492 2640   540  542  547  562
  35 *
  36 * This is how it is defined by CEA-861-D - line and pixel numbers are
  37 * referenced to the rising edge of VSYNC and HSYNC.  Total clocks per
  38 * line: 2640.  The odd frame, the first active line is at line 21, and
  39 * the even frame, the first active line is 584.
  40 *
  41 * LN:    560     561     562     563             567     568    569
  42 * DE:    ~~~|____________________________//__________________________
  43 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
  44 * VSYNC: _________________________|~~~~~~//~~~~~~~~~~~~~~~|__________
  45 *  22 blanking lines.  VSYNC at 1320 (referenced to the HSYNC rising edge).
  46 *
  47 * LN:    1123   1124    1125      1               5       6      7
  48 * DE:    ~~~|____________________________//__________________________
  49 * HSYNC: ____|~|_____|~|_____|~|_____|~|_//__|~|_____|~|_____|~|_____
  50 * VSYNC: ____________________|~~~~~~~~~~~//~~~~~~~~~~|_______________
  51 *  23 blanking lines
  52 *
  53 * The Armada LCD Controller line and pixel numbers are, like X timings,
  54 * referenced to the top left of the active frame.
  55 *
  56 * So, translating these to our LCD controller:
  57 *  Odd frame, 563 total lines, VSYNC at line 543-548, pixel 1128.
  58 *  Even frame, 562 total lines, VSYNC at line 542-547, pixel 2448.
  59 * Note: Vsync front porch remains constant!
  60 *
  61 * if (odd_frame) {
  62 *   vtotal = mode->crtc_vtotal + 1;
  63 *   vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay + 1;
  64 *   vhorizpos = mode->crtc_hsync_start - mode->crtc_htotal / 2
  65 * } else {
  66 *   vtotal = mode->crtc_vtotal;
  67 *   vbackporch = mode->crtc_vsync_start - mode->crtc_vdisplay;
  68 *   vhorizpos = mode->crtc_hsync_start;
  69 * }
  70 * vfrontporch = mode->crtc_vtotal - mode->crtc_vsync_end;
  71 *
  72 * So, we need to reprogram these registers on each vsync event:
  73 *  LCD_SPU_V_PORCH, LCD_SPU_ADV_REG, LCD_SPUT_V_H_TOTAL
  74 *
  75 * Note: we do not use the frame done interrupts because these appear
  76 * to happen too early, and lead to jitter on the display (presumably
  77 * they occur at the end of the last active line, before the vsync back
  78 * porch, which we're reprogramming.)
  79 */
  80
  81void
  82armada_drm_crtc_update_regs(struct armada_crtc *dcrtc, struct armada_regs *regs)
  83{
  84	while (regs->offset != ~0) {
  85		void __iomem *reg = dcrtc->base + regs->offset;
  86		uint32_t val;
  87
  88		val = regs->mask;
  89		if (val != 0)
  90			val &= readl_relaxed(reg);
  91		writel_relaxed(val | regs->val, reg);
  92		++regs;
  93	}
  94}
  95
  96static void armada_drm_crtc_update(struct armada_crtc *dcrtc, bool enable)
  97{
  98	uint32_t dumb_ctrl;
  99
 100	dumb_ctrl = dcrtc->cfg_dumb_ctrl;
 101
 102	if (enable)
 103		dumb_ctrl |= CFG_DUMB_ENA;
 104
 105	/*
 106	 * When the dumb interface isn't in DUMB24_RGB888_0 mode, it might
 107	 * be using SPI or GPIO.  If we set this to DUMB_BLANK, we will
 108	 * force LCD_D[23:0] to output blank color, overriding the GPIO or
 109	 * SPI usage.  So leave it as-is unless in DUMB24_RGB888_0 mode.
 110	 */
 111	if (!enable && (dumb_ctrl & DUMB_MASK) == DUMB24_RGB888_0) {
 112		dumb_ctrl &= ~DUMB_MASK;
 113		dumb_ctrl |= DUMB_BLANK;
 114	}
 115
 116	armada_updatel(dumb_ctrl,
 117		       ~(CFG_INV_CSYNC | CFG_INV_HSYNC | CFG_INV_VSYNC),
 118		       dcrtc->base + LCD_SPU_DUMB_CTRL);
 119}
 120
 121static void armada_drm_crtc_queue_state_event(struct drm_crtc *crtc)
 122{
 123	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 124	struct drm_pending_vblank_event *event;
 125
 126	/* If we have an event, we need vblank events enabled */
 127	event = xchg(&crtc->state->event, NULL);
 128	if (event) {
 129		WARN_ON(drm_crtc_vblank_get(crtc) != 0);
 130		dcrtc->event = event;
 131	}
 132}
 133
 134static void armada_drm_update_gamma(struct drm_crtc *crtc)
 135{
 136	struct drm_property_blob *blob = crtc->state->gamma_lut;
 137	void __iomem *base = drm_to_armada_crtc(crtc)->base;
 138	int i;
 139
 140	if (blob) {
 141		struct drm_color_lut *lut = blob->data;
 142
 143		armada_updatel(CFG_CSB_256x8, CFG_CSB_256x8 | CFG_PDWN256x8,
 144			       base + LCD_SPU_SRAM_PARA1);
 145
 146		for (i = 0; i < 256; i++) {
 147			writel_relaxed(drm_color_lut_extract(lut[i].red, 8),
 148				       base + LCD_SPU_SRAM_WRDAT);
 149			writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_YR,
 150				       base + LCD_SPU_SRAM_CTRL);
 151			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 152			writel_relaxed(drm_color_lut_extract(lut[i].green, 8),
 153				       base + LCD_SPU_SRAM_WRDAT);
 154			writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_UG,
 155				       base + LCD_SPU_SRAM_CTRL);
 156			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 157			writel_relaxed(drm_color_lut_extract(lut[i].blue, 8),
 158				       base + LCD_SPU_SRAM_WRDAT);
 159			writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_VB,
 160				       base + LCD_SPU_SRAM_CTRL);
 161			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 162		}
 163		armada_updatel(CFG_GAMMA_ENA, CFG_GAMMA_ENA,
 164			       base + LCD_SPU_DMA_CTRL0);
 165	} else {
 166		armada_updatel(0, CFG_GAMMA_ENA, base + LCD_SPU_DMA_CTRL0);
 167		armada_updatel(CFG_PDWN256x8, CFG_CSB_256x8 | CFG_PDWN256x8,
 168			       base + LCD_SPU_SRAM_PARA1);
 169	}
 170}
 171
 172static enum drm_mode_status armada_drm_crtc_mode_valid(struct drm_crtc *crtc,
 173	const struct drm_display_mode *mode)
 174{
 175	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 176
 177	if (mode->vscan > 1)
 178		return MODE_NO_VSCAN;
 179
 180	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
 181		return MODE_NO_DBLESCAN;
 182
 183	if (mode->flags & DRM_MODE_FLAG_HSKEW)
 184		return MODE_H_ILLEGAL;
 185
 186	/* We can't do interlaced modes if we don't have the SPU_ADV_REG */
 187	if (!dcrtc->variant->has_spu_adv_reg &&
 188	    mode->flags & DRM_MODE_FLAG_INTERLACE)
 189		return MODE_NO_INTERLACE;
 190
 191	if (mode->flags & (DRM_MODE_FLAG_BCAST | DRM_MODE_FLAG_PIXMUX |
 192			   DRM_MODE_FLAG_CLKDIV2))
 193		return MODE_BAD;
 194
 195	return MODE_OK;
 196}
 197
 198/* The mode_config.mutex will be held for this call */
 199static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
 200	const struct drm_display_mode *mode, struct drm_display_mode *adj)
 201{
 202	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 203	int ret;
 204
 205	/*
 206	 * Set CRTC modesetting parameters for the adjusted mode.  This is
 207	 * applied after the connectors, bridges, and encoders have fixed up
 208	 * this mode, as described above drm_atomic_helper_check_modeset().
 209	 */
 210	drm_mode_set_crtcinfo(adj, CRTC_INTERLACE_HALVE_V);
 211
 212	/*
 213	 * Validate the adjusted mode in case an encoder/bridge has set
 214	 * something we don't support.
 215	 */
 216	if (armada_drm_crtc_mode_valid(crtc, adj) != MODE_OK)
 217		return false;
 218
 219	/* Check whether the display mode is possible */
 220	ret = dcrtc->variant->compute_clock(dcrtc, adj, NULL);
 221	if (ret)
 222		return false;
 223
 224	return true;
 225}
 226
 227/* These are locked by dev->vbl_lock */
 228static void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask)
 229{
 230	if (dcrtc->irq_ena & mask) {
 231		dcrtc->irq_ena &= ~mask;
 232		writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 233	}
 234}
 235
 236static void armada_drm_crtc_enable_irq(struct armada_crtc *dcrtc, u32 mask)
 237{
 238	if ((dcrtc->irq_ena & mask) != mask) {
 239		dcrtc->irq_ena |= mask;
 240		writel(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 241		if (readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR) & mask)
 242			writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 243	}
 244}
 245
 246static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
 247{
 248	struct drm_pending_vblank_event *event;
 249	void __iomem *base = dcrtc->base;
 250
 251	if (stat & DMA_FF_UNDERFLOW)
 252		DRM_ERROR("video underflow on crtc %u\n", dcrtc->num);
 253	if (stat & GRA_FF_UNDERFLOW)
 254		DRM_ERROR("graphics underflow on crtc %u\n", dcrtc->num);
 255
 256	if (stat & VSYNC_IRQ)
 257		drm_crtc_handle_vblank(&dcrtc->crtc);
 258
 259	spin_lock(&dcrtc->irq_lock);
 260	if (stat & GRA_FRAME_IRQ && dcrtc->interlaced) {
 261		int i = stat & GRA_FRAME_IRQ0 ? 0 : 1;
 262		uint32_t val;
 263
 264		writel_relaxed(dcrtc->v[i].spu_v_porch, base + LCD_SPU_V_PORCH);
 265		writel_relaxed(dcrtc->v[i].spu_v_h_total,
 266			       base + LCD_SPUT_V_H_TOTAL);
 267
 268		val = readl_relaxed(base + LCD_SPU_ADV_REG);
 269		val &= ~(ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF | ADV_VSYNCOFFEN);
 270		val |= dcrtc->v[i].spu_adv_reg;
 271		writel_relaxed(val, base + LCD_SPU_ADV_REG);
 272	}
 273
 274	if (stat & dcrtc->irq_ena & DUMB_FRAMEDONE) {
 275		if (dcrtc->update_pending) {
 276			armada_drm_crtc_update_regs(dcrtc, dcrtc->regs);
 277			dcrtc->update_pending = false;
 278		}
 279		if (dcrtc->cursor_update) {
 280			writel_relaxed(dcrtc->cursor_hw_pos,
 281				       base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 282			writel_relaxed(dcrtc->cursor_hw_sz,
 283				       base + LCD_SPU_HWC_HPXL_VLN);
 284			armada_updatel(CFG_HWC_ENA,
 285				       CFG_HWC_ENA | CFG_HWC_1BITMOD |
 286				       CFG_HWC_1BITENA,
 287				       base + LCD_SPU_DMA_CTRL0);
 288			dcrtc->cursor_update = false;
 289		}
 290		armada_drm_crtc_disable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
 291	}
 292	spin_unlock(&dcrtc->irq_lock);
 293
 294	if (stat & VSYNC_IRQ && !dcrtc->update_pending) {
 295		event = xchg(&dcrtc->event, NULL);
 296		if (event) {
 297			spin_lock(&dcrtc->crtc.dev->event_lock);
 298			drm_crtc_send_vblank_event(&dcrtc->crtc, event);
 299			spin_unlock(&dcrtc->crtc.dev->event_lock);
 300			drm_crtc_vblank_put(&dcrtc->crtc);
 301		}
 302	}
 303}
 304
 305static irqreturn_t armada_drm_irq(int irq, void *arg)
 306{
 307	struct armada_crtc *dcrtc = arg;
 308	u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
 309
 310	/*
 311	 * Reading the ISR appears to clear bits provided CLEAN_SPU_IRQ_ISR
 312	 * is set.  Writing has some other effect to acknowledge the IRQ -
 313	 * without this, we only get a single IRQ.
 314	 */
 315	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 316
 317	trace_armada_drm_irq(&dcrtc->crtc, stat);
 318
 319	/* Mask out those interrupts we haven't enabled */
 320	v = stat & dcrtc->irq_ena;
 321
 322	if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
 323		armada_drm_crtc_irq(dcrtc, stat);
 324		return IRQ_HANDLED;
 325	}
 326	return IRQ_NONE;
 327}
 328
 329/* The mode_config.mutex will be held for this call */
 330static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
 331{
 332	struct drm_display_mode *adj = &crtc->state->adjusted_mode;
 333	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 334	struct armada_regs regs[17];
 335	uint32_t lm, rm, tm, bm, val, sclk;
 336	unsigned long flags;
 337	unsigned i;
 338	bool interlaced = !!(adj->flags & DRM_MODE_FLAG_INTERLACE);
 339
 340	i = 0;
 341	rm = adj->crtc_hsync_start - adj->crtc_hdisplay;
 342	lm = adj->crtc_htotal - adj->crtc_hsync_end;
 343	bm = adj->crtc_vsync_start - adj->crtc_vdisplay;
 344	tm = adj->crtc_vtotal - adj->crtc_vsync_end;
 345
 346	DRM_DEBUG_KMS("[CRTC:%d:%s] mode " DRM_MODE_FMT "\n",
 347		      crtc->base.id, crtc->name, DRM_MODE_ARG(adj));
 348	DRM_DEBUG_KMS("lm %d rm %d tm %d bm %d\n", lm, rm, tm, bm);
 349
 350	/* Now compute the divider for real */
 351	dcrtc->variant->compute_clock(dcrtc, adj, &sclk);
 352
 353	armada_reg_queue_set(regs, i, sclk, LCD_CFG_SCLK_DIV);
 354
 355	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 356
 357	dcrtc->interlaced = interlaced;
 358	/* Even interlaced/progressive frame */
 359	dcrtc->v[1].spu_v_h_total = adj->crtc_vtotal << 16 |
 360				    adj->crtc_htotal;
 361	dcrtc->v[1].spu_v_porch = tm << 16 | bm;
 362	val = adj->crtc_hsync_start;
 363	dcrtc->v[1].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
 364
 365	if (interlaced) {
 366		/* Odd interlaced frame */
 367		val -= adj->crtc_htotal / 2;
 368		dcrtc->v[0].spu_adv_reg = val << 20 | val | ADV_VSYNCOFFEN;
 369		dcrtc->v[0].spu_v_h_total = dcrtc->v[1].spu_v_h_total +
 370						(1 << 16);
 371		dcrtc->v[0].spu_v_porch = dcrtc->v[1].spu_v_porch + 1;
 372	} else {
 373		dcrtc->v[0] = dcrtc->v[1];
 374	}
 375
 376	val = adj->crtc_vdisplay << 16 | adj->crtc_hdisplay;
 377
 378	armada_reg_queue_set(regs, i, val, LCD_SPU_V_H_ACTIVE);
 379	armada_reg_queue_set(regs, i, (lm << 16) | rm, LCD_SPU_H_PORCH);
 380	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_porch, LCD_SPU_V_PORCH);
 381	armada_reg_queue_set(regs, i, dcrtc->v[0].spu_v_h_total,
 382			   LCD_SPUT_V_H_TOTAL);
 383
 384	if (dcrtc->variant->has_spu_adv_reg)
 385		armada_reg_queue_mod(regs, i, dcrtc->v[0].spu_adv_reg,
 386				     ADV_VSYNC_L_OFF | ADV_VSYNC_H_OFF |
 387				     ADV_VSYNCOFFEN, LCD_SPU_ADV_REG);
 388
 389	val = adj->flags & DRM_MODE_FLAG_NVSYNC ? CFG_VSYNC_INV : 0;
 390	armada_reg_queue_mod(regs, i, val, CFG_VSYNC_INV, LCD_SPU_DMA_CTRL1);
 391
 392	/*
 393	 * The documentation doesn't indicate what the normal state of
 394	 * the sync signals are.  Sebastian Hesselbart kindly probed
 395	 * these signals on his board to determine their state.
 396	 *
 397	 * The non-inverted state of the sync signals is active high.
 398	 * Setting these bits makes the appropriate signal active low.
 399	 */
 400	val = 0;
 401	if (adj->flags & DRM_MODE_FLAG_NCSYNC)
 402		val |= CFG_INV_CSYNC;
 403	if (adj->flags & DRM_MODE_FLAG_NHSYNC)
 404		val |= CFG_INV_HSYNC;
 405	if (adj->flags & DRM_MODE_FLAG_NVSYNC)
 406		val |= CFG_INV_VSYNC;
 407	armada_reg_queue_mod(regs, i, val, CFG_INV_CSYNC | CFG_INV_HSYNC |
 408			     CFG_INV_VSYNC, LCD_SPU_DUMB_CTRL);
 409	armada_reg_queue_end(regs, i);
 410
 411	armada_drm_crtc_update_regs(dcrtc, regs);
 412	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 413}
 414
 415static int armada_drm_crtc_atomic_check(struct drm_crtc *crtc,
 416					struct drm_crtc_state *state)
 417{
 
 
 418	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 419
 420	if (state->gamma_lut && drm_color_lut_size(state->gamma_lut) != 256)
 421		return -EINVAL;
 422
 423	if (state->color_mgmt_changed)
 424		state->planes_changed = true;
 425
 426	return 0;
 427}
 428
 429static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc,
 430					 struct drm_crtc_state *old_crtc_state)
 431{
 
 
 432	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 433
 434	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 435
 436	if (crtc->state->color_mgmt_changed)
 437		armada_drm_update_gamma(crtc);
 438
 439	dcrtc->regs_idx = 0;
 440	dcrtc->regs = dcrtc->atomic_regs;
 441}
 442
 443static void armada_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 444					 struct drm_crtc_state *old_crtc_state)
 445{
 
 
 446	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 447
 448	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 449
 450	armada_reg_queue_end(dcrtc->regs, dcrtc->regs_idx);
 451
 452	/*
 453	 * If we aren't doing a full modeset, then we need to queue
 454	 * the event here.
 455	 */
 456	if (!drm_atomic_crtc_needs_modeset(crtc->state)) {
 457		dcrtc->update_pending = true;
 458		armada_drm_crtc_queue_state_event(crtc);
 459		spin_lock_irq(&dcrtc->irq_lock);
 460		armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
 461		spin_unlock_irq(&dcrtc->irq_lock);
 462	} else {
 463		spin_lock_irq(&dcrtc->irq_lock);
 464		armada_drm_crtc_update_regs(dcrtc, dcrtc->regs);
 465		spin_unlock_irq(&dcrtc->irq_lock);
 466	}
 467}
 468
 469static void armada_drm_crtc_atomic_disable(struct drm_crtc *crtc,
 470					   struct drm_crtc_state *old_state)
 471{
 
 
 472	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 473	struct drm_pending_vblank_event *event;
 474
 475	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 476
 477	if (old_state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
 478		drm_crtc_vblank_put(crtc);
 479
 480	drm_crtc_vblank_off(crtc);
 481	armada_drm_crtc_update(dcrtc, false);
 482
 483	if (!crtc->state->active) {
 484		/*
 485		 * This modeset will be leaving the CRTC disabled, so
 486		 * call the backend to disable upstream clocks etc.
 487		 */
 488		if (dcrtc->variant->disable)
 489			dcrtc->variant->disable(dcrtc);
 490
 491		/*
 492		 * We will not receive any further vblank events.
 493		 * Send the flip_done event manually.
 494		 */
 495		event = crtc->state->event;
 496		crtc->state->event = NULL;
 497		if (event) {
 498			spin_lock_irq(&crtc->dev->event_lock);
 499			drm_crtc_send_vblank_event(crtc, event);
 500			spin_unlock_irq(&crtc->dev->event_lock);
 501		}
 502	}
 503}
 504
 505static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc,
 506					  struct drm_crtc_state *old_state)
 507{
 
 
 508	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 509
 510	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 511
 512	if (!old_state->active) {
 513		/*
 514		 * This modeset is enabling the CRTC after it having
 515		 * been disabled.  Reverse the call to ->disable in
 516		 * the atomic_disable().
 517		 */
 518		if (dcrtc->variant->enable)
 519			dcrtc->variant->enable(dcrtc, &crtc->state->adjusted_mode);
 520	}
 521	armada_drm_crtc_update(dcrtc, true);
 522	drm_crtc_vblank_on(crtc);
 523
 524	if (crtc->state->adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE)
 525		WARN_ON(drm_crtc_vblank_get(crtc));
 526
 527	armada_drm_crtc_queue_state_event(crtc);
 528}
 529
 530static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = {
 531	.mode_valid	= armada_drm_crtc_mode_valid,
 532	.mode_fixup	= armada_drm_crtc_mode_fixup,
 533	.mode_set_nofb	= armada_drm_crtc_mode_set_nofb,
 534	.atomic_check	= armada_drm_crtc_atomic_check,
 535	.atomic_begin	= armada_drm_crtc_atomic_begin,
 536	.atomic_flush	= armada_drm_crtc_atomic_flush,
 537	.atomic_disable	= armada_drm_crtc_atomic_disable,
 538	.atomic_enable	= armada_drm_crtc_atomic_enable,
 539};
 540
 541static void armada_load_cursor_argb(void __iomem *base, uint32_t *pix,
 542	unsigned stride, unsigned width, unsigned height)
 543{
 544	uint32_t addr;
 545	unsigned y;
 546
 547	addr = SRAM_HWC32_RAM1;
 548	for (y = 0; y < height; y++) {
 549		uint32_t *p = &pix[y * stride];
 550		unsigned x;
 551
 552		for (x = 0; x < width; x++, p++) {
 553			uint32_t val = *p;
 554
 555			/*
 556			 * In "ARGB888" (HWC32) mode, writing to the SRAM
 557			 * requires these bits to contain:
 558			 * 31:24 = alpha 23:16 = blue 15:8 = green 7:0 = red
 559			 * So, it's actually ABGR8888.  This is independent
 560			 * of the SWAPRB bits in DMA control register 0.
 561			 */
 562			val = (val & 0xff00ff00) |
 563			      (val & 0x000000ff) << 16 |
 564			      (val & 0x00ff0000) >> 16;
 565
 566			writel_relaxed(val,
 567				       base + LCD_SPU_SRAM_WRDAT);
 568			writel_relaxed(addr | SRAM_WRITE,
 569				       base + LCD_SPU_SRAM_CTRL);
 570			readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
 571			addr += 1;
 572			if ((addr & 0x00ff) == 0)
 573				addr += 0xf00;
 574			if ((addr & 0x30ff) == 0)
 575				addr = SRAM_HWC32_RAM2;
 576		}
 577	}
 578}
 579
 580static void armada_drm_crtc_cursor_tran(void __iomem *base)
 581{
 582	unsigned addr;
 583
 584	for (addr = 0; addr < 256; addr++) {
 585		/* write the default value */
 586		writel_relaxed(0x55555555, base + LCD_SPU_SRAM_WRDAT);
 587		writel_relaxed(addr | SRAM_WRITE | SRAM_HWC32_TRAN,
 588			       base + LCD_SPU_SRAM_CTRL);
 589	}
 590}
 591
 592static int armada_drm_crtc_cursor_update(struct armada_crtc *dcrtc, bool reload)
 593{
 594	uint32_t xoff, xscr, w = dcrtc->cursor_w, s;
 595	uint32_t yoff, yscr, h = dcrtc->cursor_h;
 596	uint32_t para1;
 597
 598	/*
 599	 * Calculate the visible width and height of the cursor,
 600	 * screen position, and the position in the cursor bitmap.
 601	 */
 602	if (dcrtc->cursor_x < 0) {
 603		xoff = -dcrtc->cursor_x;
 604		xscr = 0;
 605		w -= min(xoff, w);
 606	} else if (dcrtc->cursor_x + w > dcrtc->crtc.mode.hdisplay) {
 607		xoff = 0;
 608		xscr = dcrtc->cursor_x;
 609		w = max_t(int, dcrtc->crtc.mode.hdisplay - dcrtc->cursor_x, 0);
 610	} else {
 611		xoff = 0;
 612		xscr = dcrtc->cursor_x;
 613	}
 614
 615	if (dcrtc->cursor_y < 0) {
 616		yoff = -dcrtc->cursor_y;
 617		yscr = 0;
 618		h -= min(yoff, h);
 619	} else if (dcrtc->cursor_y + h > dcrtc->crtc.mode.vdisplay) {
 620		yoff = 0;
 621		yscr = dcrtc->cursor_y;
 622		h = max_t(int, dcrtc->crtc.mode.vdisplay - dcrtc->cursor_y, 0);
 623	} else {
 624		yoff = 0;
 625		yscr = dcrtc->cursor_y;
 626	}
 627
 628	/* On interlaced modes, the vertical cursor size must be halved */
 629	s = dcrtc->cursor_w;
 630	if (dcrtc->interlaced) {
 631		s *= 2;
 632		yscr /= 2;
 633		h /= 2;
 634	}
 635
 636	if (!dcrtc->cursor_obj || !h || !w) {
 637		spin_lock_irq(&dcrtc->irq_lock);
 638		dcrtc->cursor_update = false;
 639		armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
 640		spin_unlock_irq(&dcrtc->irq_lock);
 641		return 0;
 642	}
 643
 644	spin_lock_irq(&dcrtc->irq_lock);
 645	para1 = readl_relaxed(dcrtc->base + LCD_SPU_SRAM_PARA1);
 646	armada_updatel(CFG_CSB_256x32, CFG_CSB_256x32 | CFG_PDWN256x32,
 647		       dcrtc->base + LCD_SPU_SRAM_PARA1);
 648	spin_unlock_irq(&dcrtc->irq_lock);
 649
 650	/*
 651	 * Initialize the transparency if the SRAM was powered down.
 652	 * We must also reload the cursor data as well.
 653	 */
 654	if (!(para1 & CFG_CSB_256x32)) {
 655		armada_drm_crtc_cursor_tran(dcrtc->base);
 656		reload = true;
 657	}
 658
 659	if (dcrtc->cursor_hw_sz != (h << 16 | w)) {
 660		spin_lock_irq(&dcrtc->irq_lock);
 661		dcrtc->cursor_update = false;
 662		armada_updatel(0, CFG_HWC_ENA, dcrtc->base + LCD_SPU_DMA_CTRL0);
 663		spin_unlock_irq(&dcrtc->irq_lock);
 664		reload = true;
 665	}
 666	if (reload) {
 667		struct armada_gem_object *obj = dcrtc->cursor_obj;
 668		uint32_t *pix;
 669		/* Set the top-left corner of the cursor image */
 670		pix = obj->addr;
 671		pix += yoff * s + xoff;
 672		armada_load_cursor_argb(dcrtc->base, pix, s, w, h);
 673	}
 674
 675	/* Reload the cursor position, size and enable in the IRQ handler */
 676	spin_lock_irq(&dcrtc->irq_lock);
 677	dcrtc->cursor_hw_pos = yscr << 16 | xscr;
 678	dcrtc->cursor_hw_sz = h << 16 | w;
 679	dcrtc->cursor_update = true;
 680	armada_drm_crtc_enable_irq(dcrtc, DUMB_FRAMEDONE_ENA);
 681	spin_unlock_irq(&dcrtc->irq_lock);
 682
 683	return 0;
 684}
 685
 686static void cursor_update(void *data)
 687{
 688	armada_drm_crtc_cursor_update(data, true);
 689}
 690
 691static int armada_drm_crtc_cursor_set(struct drm_crtc *crtc,
 692	struct drm_file *file, uint32_t handle, uint32_t w, uint32_t h)
 693{
 694	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 695	struct armada_gem_object *obj = NULL;
 696	int ret;
 697
 698	/* If no cursor support, replicate drm's return value */
 699	if (!dcrtc->variant->has_spu_adv_reg)
 700		return -ENXIO;
 701
 702	if (handle && w > 0 && h > 0) {
 703		/* maximum size is 64x32 or 32x64 */
 704		if (w > 64 || h > 64 || (w > 32 && h > 32))
 705			return -ENOMEM;
 706
 707		obj = armada_gem_object_lookup(file, handle);
 708		if (!obj)
 709			return -ENOENT;
 710
 711		/* Must be a kernel-mapped object */
 712		if (!obj->addr) {
 713			drm_gem_object_put_unlocked(&obj->obj);
 714			return -EINVAL;
 715		}
 716
 717		if (obj->obj.size < w * h * 4) {
 718			DRM_ERROR("buffer is too small\n");
 719			drm_gem_object_put_unlocked(&obj->obj);
 720			return -ENOMEM;
 721		}
 722	}
 723
 724	if (dcrtc->cursor_obj) {
 725		dcrtc->cursor_obj->update = NULL;
 726		dcrtc->cursor_obj->update_data = NULL;
 727		drm_gem_object_put_unlocked(&dcrtc->cursor_obj->obj);
 728	}
 729	dcrtc->cursor_obj = obj;
 730	dcrtc->cursor_w = w;
 731	dcrtc->cursor_h = h;
 732	ret = armada_drm_crtc_cursor_update(dcrtc, true);
 733	if (obj) {
 734		obj->update_data = dcrtc;
 735		obj->update = cursor_update;
 736	}
 737
 738	return ret;
 739}
 740
 741static int armada_drm_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
 742{
 743	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 744	int ret;
 745
 746	/* If no cursor support, replicate drm's return value */
 747	if (!dcrtc->variant->has_spu_adv_reg)
 748		return -EFAULT;
 749
 750	dcrtc->cursor_x = x;
 751	dcrtc->cursor_y = y;
 752	ret = armada_drm_crtc_cursor_update(dcrtc, false);
 753
 754	return ret;
 755}
 756
 757static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
 758{
 759	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 760	struct armada_private *priv = crtc->dev->dev_private;
 761
 762	if (dcrtc->cursor_obj)
 763		drm_gem_object_put_unlocked(&dcrtc->cursor_obj->obj);
 764
 765	priv->dcrtc[dcrtc->num] = NULL;
 766	drm_crtc_cleanup(&dcrtc->crtc);
 767
 768	if (dcrtc->variant->disable)
 769		dcrtc->variant->disable(dcrtc);
 770
 771	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA);
 772
 773	of_node_put(dcrtc->crtc.port);
 774
 775	kfree(dcrtc);
 776}
 777
 778static int armada_drm_crtc_late_register(struct drm_crtc *crtc)
 779{
 780	if (IS_ENABLED(CONFIG_DEBUG_FS))
 781		armada_drm_crtc_debugfs_init(drm_to_armada_crtc(crtc));
 782
 783	return 0;
 784}
 785
 786/* These are called under the vbl_lock. */
 787static int armada_drm_crtc_enable_vblank(struct drm_crtc *crtc)
 788{
 789	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 790	unsigned long flags;
 791
 792	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 793	armada_drm_crtc_enable_irq(dcrtc, VSYNC_IRQ_ENA);
 794	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 795	return 0;
 796}
 797
 798static void armada_drm_crtc_disable_vblank(struct drm_crtc *crtc)
 799{
 800	struct armada_crtc *dcrtc = drm_to_armada_crtc(crtc);
 801	unsigned long flags;
 802
 803	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 804	armada_drm_crtc_disable_irq(dcrtc, VSYNC_IRQ_ENA);
 805	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 806}
 807
 808static const struct drm_crtc_funcs armada_crtc_funcs = {
 809	.reset		= drm_atomic_helper_crtc_reset,
 810	.cursor_set	= armada_drm_crtc_cursor_set,
 811	.cursor_move	= armada_drm_crtc_cursor_move,
 812	.destroy	= armada_drm_crtc_destroy,
 813	.gamma_set	= drm_atomic_helper_legacy_gamma_set,
 814	.set_config	= drm_atomic_helper_set_config,
 815	.page_flip	= drm_atomic_helper_page_flip,
 816	.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
 817	.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
 818	.late_register	= armada_drm_crtc_late_register,
 819	.enable_vblank	= armada_drm_crtc_enable_vblank,
 820	.disable_vblank	= armada_drm_crtc_disable_vblank,
 821};
 822
 823int armada_crtc_select_clock(struct armada_crtc *dcrtc,
 824			     struct armada_clk_result *res,
 825			     const struct armada_clocking_params *params,
 826			     struct clk *clks[], size_t num_clks,
 827			     unsigned long desired_khz)
 828{
 829	unsigned long desired_hz = desired_khz * 1000;
 830	unsigned long desired_clk_hz;	// requested clk input
 831	unsigned long real_clk_hz;	// actual clk input
 832	unsigned long real_hz;		// actual pixel clk
 833	unsigned long permillage;
 834	struct clk *clk;
 835	u32 div;
 836	int i;
 837
 838	DRM_DEBUG_KMS("[CRTC:%u:%s] desired clock=%luHz\n",
 839		      dcrtc->crtc.base.id, dcrtc->crtc.name, desired_hz);
 840
 841	for (i = 0; i < num_clks; i++) {
 842		clk = clks[i];
 843		if (!clk)
 844			continue;
 845
 846		if (params->settable & BIT(i)) {
 847			real_clk_hz = clk_round_rate(clk, desired_hz);
 848			desired_clk_hz = desired_hz;
 849		} else {
 850			real_clk_hz = clk_get_rate(clk);
 851			desired_clk_hz = real_clk_hz;
 852		}
 853
 854		/* If the clock can do exactly the desired rate, we're done */
 855		if (real_clk_hz == desired_hz) {
 856			real_hz = real_clk_hz;
 857			div = 1;
 858			goto found;
 859		}
 860
 861		/* Calculate the divider - if invalid, we can't do this rate */
 862		div = DIV_ROUND_CLOSEST(real_clk_hz, desired_hz);
 863		if (div == 0 || div > params->div_max)
 864			continue;
 865
 866		/* Calculate the actual rate - HDMI requires -0.6%..+0.5% */
 867		real_hz = DIV_ROUND_CLOSEST(real_clk_hz, div);
 868
 869		DRM_DEBUG_KMS("[CRTC:%u:%s] clk=%u %luHz div=%u real=%luHz\n",
 870			dcrtc->crtc.base.id, dcrtc->crtc.name,
 871			i, real_clk_hz, div, real_hz);
 872
 873		/* Avoid repeated division */
 874		if (real_hz < desired_hz) {
 875			permillage = real_hz / desired_khz;
 876			if (permillage < params->permillage_min)
 877				continue;
 878		} else {
 879			permillage = DIV_ROUND_UP(real_hz, desired_khz);
 880			if (permillage > params->permillage_max)
 881				continue;
 882		}
 883		goto found;
 884	}
 885
 886	return -ERANGE;
 887
 888found:
 889	DRM_DEBUG_KMS("[CRTC:%u:%s] selected clk=%u %luHz div=%u real=%luHz\n",
 890		dcrtc->crtc.base.id, dcrtc->crtc.name,
 891		i, real_clk_hz, div, real_hz);
 892
 893	res->desired_clk_hz = desired_clk_hz;
 894	res->clk = clk;
 895	res->div = div;
 896
 897	return i;
 898}
 899
 900static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev,
 901	struct resource *res, int irq, const struct armada_variant *variant,
 902	struct device_node *port)
 903{
 904	struct armada_private *priv = drm->dev_private;
 905	struct armada_crtc *dcrtc;
 906	struct drm_plane *primary;
 907	void __iomem *base;
 908	int ret;
 909
 910	base = devm_ioremap_resource(dev, res);
 911	if (IS_ERR(base))
 912		return PTR_ERR(base);
 913
 914	dcrtc = kzalloc(sizeof(*dcrtc), GFP_KERNEL);
 915	if (!dcrtc) {
 916		DRM_ERROR("failed to allocate Armada crtc\n");
 917		return -ENOMEM;
 918	}
 919
 920	if (dev != drm->dev)
 921		dev_set_drvdata(dev, dcrtc);
 922
 923	dcrtc->variant = variant;
 924	dcrtc->base = base;
 925	dcrtc->num = drm->mode_config.num_crtc;
 926	dcrtc->cfg_dumb_ctrl = DUMB24_RGB888_0;
 927	dcrtc->spu_iopad_ctrl = CFG_VSCALE_LN_EN | CFG_IOPAD_DUMB24;
 928	spin_lock_init(&dcrtc->irq_lock);
 929	dcrtc->irq_ena = CLEAN_SPU_IRQ_ISR;
 930
 931	/* Initialize some registers which we don't otherwise set */
 932	writel_relaxed(0x00000001, dcrtc->base + LCD_CFG_SCLK_DIV);
 933	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_BLANKCOLOR);
 934	writel_relaxed(dcrtc->spu_iopad_ctrl,
 935		       dcrtc->base + LCD_SPU_IOPAD_CONTROL);
 936	writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_SRAM_PARA0);
 937	writel_relaxed(CFG_PDWN256x32 | CFG_PDWN256x24 | CFG_PDWN256x8 |
 938		       CFG_PDWN32x32 | CFG_PDWN16x66 | CFG_PDWN32x66 |
 939		       CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
 940	writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1);
 941	writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
 942	readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
 943	writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
 944
 945	ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc",
 946			       dcrtc);
 947	if (ret < 0)
 948		goto err_crtc;
 949
 950	if (dcrtc->variant->init) {
 951		ret = dcrtc->variant->init(dcrtc, dev);
 952		if (ret)
 953			goto err_crtc;
 954	}
 955
 956	/* Ensure AXI pipeline is enabled */
 957	armada_updatel(CFG_ARBFAST_ENA, 0, dcrtc->base + LCD_SPU_DMA_CTRL0);
 958
 959	priv->dcrtc[dcrtc->num] = dcrtc;
 960
 961	dcrtc->crtc.port = port;
 962
 963	primary = kzalloc(sizeof(*primary), GFP_KERNEL);
 964	if (!primary) {
 965		ret = -ENOMEM;
 966		goto err_crtc;
 967	}
 968
 969	ret = armada_drm_primary_plane_init(drm, primary);
 970	if (ret) {
 971		kfree(primary);
 972		goto err_crtc;
 973	}
 974
 975	ret = drm_crtc_init_with_planes(drm, &dcrtc->crtc, primary, NULL,
 976					&armada_crtc_funcs, NULL);
 977	if (ret)
 978		goto err_crtc_init;
 979
 980	drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs);
 981
 982	ret = drm_mode_crtc_set_gamma_size(&dcrtc->crtc, 256);
 983	if (ret)
 984		return ret;
 985
 986	drm_crtc_enable_color_mgmt(&dcrtc->crtc, 0, false, 256);
 987
 988	return armada_overlay_plane_create(drm, 1 << dcrtc->num);
 989
 990err_crtc_init:
 991	primary->funcs->destroy(primary);
 992err_crtc:
 993	kfree(dcrtc);
 994
 995	return ret;
 996}
 997
 998static int
 999armada_lcd_bind(struct device *dev, struct device *master, void *data)
1000{
1001	struct platform_device *pdev = to_platform_device(dev);
1002	struct drm_device *drm = data;
1003	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1004	int irq = platform_get_irq(pdev, 0);
1005	const struct armada_variant *variant;
1006	struct device_node *port = NULL;
 
1007
1008	if (irq < 0)
1009		return irq;
1010
1011	if (!dev->of_node) {
1012		const struct platform_device_id *id;
1013
1014		id = platform_get_device_id(pdev);
1015		if (!id)
1016			return -ENXIO;
1017
1018		variant = (const struct armada_variant *)id->driver_data;
1019	} else {
1020		const struct of_device_id *match;
1021		struct device_node *np, *parent = dev->of_node;
1022
1023		match = of_match_device(dev->driver->of_match_table, dev);
1024		if (!match)
1025			return -ENXIO;
1026
 
1027		np = of_get_child_by_name(parent, "ports");
1028		if (np)
1029			parent = np;
1030		port = of_get_child_by_name(parent, "port");
1031		of_node_put(np);
1032		if (!port) {
1033			dev_err(dev, "no port node found in %pOF\n", parent);
1034			return -ENXIO;
1035		}
1036
1037		variant = match->data;
1038	}
1039
1040	return armada_drm_crtc_create(drm, dev, res, irq, variant, port);
1041}
1042
1043static void
1044armada_lcd_unbind(struct device *dev, struct device *master, void *data)
1045{
1046	struct armada_crtc *dcrtc = dev_get_drvdata(dev);
1047
1048	armada_drm_crtc_destroy(&dcrtc->crtc);
1049}
1050
1051static const struct component_ops armada_lcd_ops = {
1052	.bind = armada_lcd_bind,
1053	.unbind = armada_lcd_unbind,
1054};
1055
1056static int armada_lcd_probe(struct platform_device *pdev)
1057{
1058	return component_add(&pdev->dev, &armada_lcd_ops);
1059}
1060
1061static int armada_lcd_remove(struct platform_device *pdev)
1062{
1063	component_del(&pdev->dev, &armada_lcd_ops);
1064	return 0;
1065}
1066
1067static const struct of_device_id armada_lcd_of_match[] = {
1068	{
1069		.compatible	= "marvell,dove-lcd",
1070		.data		= &armada510_ops,
1071	},
1072	{}
1073};
1074MODULE_DEVICE_TABLE(of, armada_lcd_of_match);
1075
1076static const struct platform_device_id armada_lcd_platform_ids[] = {
1077	{
1078		.name		= "armada-lcd",
1079		.driver_data	= (unsigned long)&armada510_ops,
1080	}, {
1081		.name		= "armada-510-lcd",
1082		.driver_data	= (unsigned long)&armada510_ops,
1083	},
1084	{ },
1085};
1086MODULE_DEVICE_TABLE(platform, armada_lcd_platform_ids);
1087
1088struct platform_driver armada_lcd_platform_driver = {
1089	.probe	= armada_lcd_probe,
1090	.remove	= armada_lcd_remove,
1091	.driver = {
1092		.name	= "armada-lcd",
1093		.owner	=  THIS_MODULE,
1094		.of_match_table = armada_lcd_of_match,
1095	},
1096	.id_table = armada_lcd_platform_ids,
1097};