1 // SPDX-License-Identifier: GPL-2.0-or-later
30 #include "regs-decon7.h"
62 	{.compatible = "samsung,exynos7-decon"},
86 	struct decon_context *ctx = crtc->ctx;  in decon_wait_for_vblank()  local
88 	if (ctx->suspended)  in decon_wait_for_vblank()
91 	atomic_set(&ctx->wait_vsync_event, 1);  in decon_wait_for_vblank()
97 	if (!wait_event_timeout(ctx->wait_vsync_queue,  in decon_wait_for_vblank()
98 				!atomic_read(&ctx->wait_vsync_event),  in decon_wait_for_vblank()
100 		DRM_DEV_DEBUG_KMS(ctx->dev, "vblank wait timed out.\n");  in decon_wait_for_vblank()
105 	struct decon_context *ctx = crtc->ctx;  in decon_clear_channels()  local
110 		u32 val = readl(ctx->regs + WINCON(win));  in decon_clear_channels()
114 			writel(val, ctx->regs + WINCON(win));  in decon_clear_channels()
121 		decon_wait_for_vblank(ctx->crtc);  in decon_clear_channels()
124 static int decon_ctx_initialize(struct decon_context *ctx,  in decon_ctx_initialize()  argument
127 	ctx->drm_dev = drm_dev;  in decon_ctx_initialize()
129 	decon_clear_channels(ctx->crtc);  in decon_ctx_initialize()
131 	return exynos_drm_register_dma(drm_dev, ctx->dev, &ctx->dma_priv);  in decon_ctx_initialize()
134 static void decon_ctx_remove(struct decon_context *ctx)  in decon_ctx_remove()  argument
136 	/* detach this sub driver from iommu mapping if supported. */  in decon_ctx_remove()
137 	exynos_drm_unregister_dma(ctx->drm_dev, ctx->dev, &ctx->dma_priv);  in decon_ctx_remove()
140 static u32 decon_calc_clkdiv(struct decon_context *ctx,  in decon_calc_clkdiv()  argument
143 	unsigned long ideal_clk = mode->clock;  in decon_calc_clkdiv()
147 	clkdiv = DIV_ROUND_UP(clk_get_rate(ctx->vclk), ideal_clk);  in decon_calc_clkdiv()
154 	struct decon_context *ctx = crtc->ctx;  in decon_commit()  local
155 	struct drm_display_mode *mode = &crtc->base.state->adjusted_mode;  in decon_commit()
158 	if (ctx->suspended)  in decon_commit()
162 	if (mode->htotal == 0 || mode->vtotal == 0)  in decon_commit()
165 	if (!ctx->i80_if) {  in decon_commit()
168 		vsync_len = mode->crtc_vsync_end - mode->crtc_vsync_start;  in decon_commit()
169 		vbpd = mode->crtc_vtotal - mode->crtc_vsync_end;  in decon_commit()
170 		vfpd = mode->crtc_vsync_start - mode->crtc_vdisplay;  in decon_commit()
172 		val = VIDTCON0_VBPD(vbpd - 1) | VIDTCON0_VFPD(vfpd - 1);  in decon_commit()
173 		writel(val, ctx->regs + VIDTCON0);  in decon_commit()
175 		val = VIDTCON1_VSPW(vsync_len - 1);  in decon_commit()
176 		writel(val, ctx->regs + VIDTCON1);  in decon_commit()
179 		hsync_len = mode->crtc_hsync_end - mode->crtc_hsync_start;  in decon_commit()
180 		hbpd = mode->crtc_htotal - mode->crtc_hsync_end;  in decon_commit()
181 		hfpd = mode->crtc_hsync_start - mode->crtc_hdisplay;  in decon_commit()
184 		val = VIDTCON2_HBPD(hbpd - 1) | VIDTCON2_HFPD(hfpd - 1);  in decon_commit()
185 		writel(val, ctx->regs + VIDTCON2);  in decon_commit()
187 		val = VIDTCON3_HSPW(hsync_len - 1);  in decon_commit()
188 		writel(val, ctx->regs + VIDTCON3);  in decon_commit()
192 	val = VIDTCON4_LINEVAL(mode->vdisplay - 1) |  in decon_commit()
193 	       VIDTCON4_HOZVAL(mode->hdisplay - 1);  in decon_commit()
194 	writel(val, ctx->regs + VIDTCON4);  in decon_commit()
196 	writel(mode->vdisplay - 1, ctx->regs + LINECNT_OP_THRESHOLD);  in decon_commit()
203 	writel(val, ctx->regs + VIDCON0);  in decon_commit()
205 	clkdiv = decon_calc_clkdiv(ctx, mode);  in decon_commit()
207 		val = VCLKCON1_CLKVAL_NUM_VCLK(clkdiv - 1);  in decon_commit()
208 		writel(val, ctx->regs + VCLKCON1);  in decon_commit()
209 		writel(val, ctx->regs + VCLKCON2);  in decon_commit()
212 	val = readl(ctx->regs + DECON_UPDATE);  in decon_commit()
214 	writel(val, ctx->regs + DECON_UPDATE);  in decon_commit()
219 	struct decon_context *ctx = crtc->ctx;  in decon_enable_vblank()  local
222 	if (ctx->suspended)  in decon_enable_vblank()
223 		return -EPERM;  in decon_enable_vblank()
225 	if (!test_and_set_bit(0, &ctx->irq_flags)) {  in decon_enable_vblank()
226 		val = readl(ctx->regs + VIDINTCON0);  in decon_enable_vblank()
230 		if (!ctx->i80_if) {  in decon_enable_vblank()
236 		writel(val, ctx->regs + VIDINTCON0);  in decon_enable_vblank()
244 	struct decon_context *ctx = crtc->ctx;  in decon_disable_vblank()  local
247 	if (ctx->suspended)  in decon_disable_vblank()
250 	if (test_and_clear_bit(0, &ctx->irq_flags)) {  in decon_disable_vblank()
251 		val = readl(ctx->regs + VIDINTCON0);  in decon_disable_vblank()
254 		if (!ctx->i80_if)  in decon_disable_vblank()
257 		writel(val, ctx->regs + VIDINTCON0);  in decon_disable_vblank()
261 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,  in decon_win_set_pixfmt()  argument
267 	val = readl(ctx->regs + WINCON(win));  in decon_win_set_pixfmt()
270 	switch (fb->format->format) {  in decon_win_set_pixfmt()
314 	DRM_DEV_DEBUG_KMS(ctx->dev, "cpp = %d\n", fb->format->cpp[0]);  in decon_win_set_pixfmt()
317 	 * In case of exynos, setting dma-burst to 16Word causes permanent  in decon_win_set_pixfmt()
321 	 * movement causes unstable DMA which results into iommu crash/tear.  in decon_win_set_pixfmt()
324 	padding = (fb->pitches[0] / fb->format->cpp[0]) - fb->width;  in decon_win_set_pixfmt()
325 	if (fb->width + padding < MIN_FB_WIDTH_FOR_16WORD_BURST) {  in decon_win_set_pixfmt()
330 	writel(val, ctx->regs + WINCON(win));  in decon_win_set_pixfmt()
333 static void decon_win_set_colkey(struct decon_context *ctx, unsigned int win)  in decon_win_set_colkey()  argument
342 	writel(keycon0, ctx->regs + WKEYCON0_BASE(win));  in decon_win_set_colkey()
343 	writel(keycon1, ctx->regs + WKEYCON1_BASE(win));  in decon_win_set_colkey()
347  * decon_shadow_protect_win() - disable updating values from shadow registers at vsync
349  * @ctx: display and enhancement controller context
353 static void decon_shadow_protect_win(struct decon_context *ctx,  in decon_shadow_protect_win()  argument
360 	val = readl(ctx->regs + SHADOWCON);  in decon_shadow_protect_win()
365 	writel(val, ctx->regs + SHADOWCON);  in decon_shadow_protect_win()
370 	struct decon_context *ctx = crtc->ctx;  in decon_atomic_begin()  local
373 	if (ctx->suspended)  in decon_atomic_begin()
377 		decon_shadow_protect_win(ctx, i, true);  in decon_atomic_begin()
384 				to_exynos_plane_state(plane->base.state);  in decon_update_plane()
385 	struct decon_context *ctx = crtc->ctx;  in decon_update_plane()  local
386 	struct drm_framebuffer *fb = state->base.fb;  in decon_update_plane()
391 	unsigned int win = plane->index;  in decon_update_plane()
392 	unsigned int cpp = fb->format->cpp[0];  in decon_update_plane()
393 	unsigned int pitch = fb->pitches[0];  in decon_update_plane()
395 	if (ctx->suspended)  in decon_update_plane()
410 	writel(val, ctx->regs + VIDW_BUF_START(win));  in decon_update_plane()
412 	padding = (pitch / cpp) - fb->width;  in decon_update_plane()
415 	writel(fb->width + padding, ctx->regs + VIDW_WHOLE_X(win));  in decon_update_plane()
416 	writel(fb->height, ctx->regs + VIDW_WHOLE_Y(win));  in decon_update_plane()
419 	writel(state->src.x, ctx->regs + VIDW_OFFSET_X(win));  in decon_update_plane()
420 	writel(state->src.y, ctx->regs + VIDW_OFFSET_Y(win));  in decon_update_plane()
422 	DRM_DEV_DEBUG_KMS(ctx->dev, "start addr = 0x%lx\n",  in decon_update_plane()
424 	DRM_DEV_DEBUG_KMS(ctx->dev, "ovl_width = %d, ovl_height = %d\n",  in decon_update_plane()
425 			state->crtc.w, state->crtc.h);  in decon_update_plane()
427 	val = VIDOSDxA_TOPLEFT_X(state->crtc.x) |  in decon_update_plane()
428 		VIDOSDxA_TOPLEFT_Y(state->crtc.y);  in decon_update_plane()
429 	writel(val, ctx->regs + VIDOSD_A(win));  in decon_update_plane()
431 	last_x = state->crtc.x + state->crtc.w;  in decon_update_plane()
433 		last_x--;  in decon_update_plane()
434 	last_y = state->crtc.y + state->crtc.h;  in decon_update_plane()
436 		last_y--;  in decon_update_plane()
440 	writel(val, ctx->regs + VIDOSD_B(win));  in decon_update_plane()
442 	DRM_DEV_DEBUG_KMS(ctx->dev, "osd pos: tx = %d, ty = %d, bx = %d, by = %d\n",  in decon_update_plane()
443 			state->crtc.x, state->crtc.y, last_x, last_y);  in decon_update_plane()
450 	writel(alpha, ctx->regs + VIDOSD_C(win));  in decon_update_plane()
456 	writel(alpha, ctx->regs + VIDOSD_D(win));  in decon_update_plane()
458 	decon_win_set_pixfmt(ctx, win, fb);  in decon_update_plane()
462 		decon_win_set_colkey(ctx, win);  in decon_update_plane()
465 	val = readl(ctx->regs + WINCON(win));  in decon_update_plane()
468 	writel(val, ctx->regs + WINCON(win));  in decon_update_plane()
471 	decon_shadow_protect_win(ctx, win, false);  in decon_update_plane()
473 	val = readl(ctx->regs + DECON_UPDATE);  in decon_update_plane()
475 	writel(val, ctx->regs + DECON_UPDATE);  in decon_update_plane()
481 	struct decon_context *ctx = crtc->ctx;  in decon_disable_plane()  local
482 	unsigned int win = plane->index;  in decon_disable_plane()
485 	if (ctx->suspended)  in decon_disable_plane()
489 	decon_shadow_protect_win(ctx, win, true);  in decon_disable_plane()
492 	val = readl(ctx->regs + WINCON(win));  in decon_disable_plane()
494 	writel(val, ctx->regs + WINCON(win));  in decon_disable_plane()
496 	val = readl(ctx->regs + DECON_UPDATE);  in decon_disable_plane()
498 	writel(val, ctx->regs + DECON_UPDATE);  in decon_disable_plane()
503 	struct decon_context *ctx = crtc->ctx;  in decon_atomic_flush()  local
506 	if (ctx->suspended)  in decon_atomic_flush()
510 		decon_shadow_protect_win(ctx, i, false);  in decon_atomic_flush()
514 static void decon_init(struct decon_context *ctx)  in decon_init()  argument
518 	writel(VIDCON0_SWRESET, ctx->regs + VIDCON0);  in decon_init()
521 	if (!ctx->i80_if)  in decon_init()
523 	writel(val, ctx->regs + VIDOUTCON0);  in decon_init()
525 	writel(VCLKCON0_CLKVALUP | VCLKCON0_VCLKFREE, ctx->regs + VCLKCON0);  in decon_init()
527 	if (!ctx->i80_if)  in decon_init()
528 		writel(VIDCON1_VCLK_HOLD, ctx->regs + VIDCON1(0));  in decon_init()
533 	struct decon_context *ctx = crtc->ctx;  in decon_atomic_enable()  local
536 	if (!ctx->suspended)  in decon_atomic_enable()
539 	ret = pm_runtime_resume_and_get(ctx->dev);  in decon_atomic_enable()
541 		DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n");  in decon_atomic_enable()
545 	decon_init(ctx);  in decon_atomic_enable()
548 	if (test_and_clear_bit(0, &ctx->irq_flags))  in decon_atomic_enable()
549 		decon_enable_vblank(ctx->crtc);  in decon_atomic_enable()
551 	decon_commit(ctx->crtc);  in decon_atomic_enable()
553 	ctx->suspended = false;  in decon_atomic_enable()
558 	struct decon_context *ctx = crtc->ctx;  in decon_atomic_disable()  local
561 	if (ctx->suspended)  in decon_atomic_disable()
570 		decon_disable_plane(crtc, &ctx->planes[i]);  in decon_atomic_disable()
572 	pm_runtime_put_sync(ctx->dev);  in decon_atomic_disable()
574 	ctx->suspended = true;  in decon_atomic_disable()
591 	struct decon_context *ctx = (struct decon_context *)dev_id;  in decon_irq_handler()  local
594 	val = readl(ctx->regs + VIDINTCON1);  in decon_irq_handler()
596 	clear_bit = ctx->i80_if ? VIDINTCON1_INT_I80 : VIDINTCON1_INT_FRAME;  in decon_irq_handler()
598 		writel(clear_bit, ctx->regs + VIDINTCON1);  in decon_irq_handler()
601 	if (!ctx->drm_dev)  in decon_irq_handler()
604 	if (!ctx->i80_if) {  in decon_irq_handler()
605 		drm_crtc_handle_vblank(&ctx->crtc->base);  in decon_irq_handler()
608 		if (atomic_read(&ctx->wait_vsync_event)) {  in decon_irq_handler()
609 			atomic_set(&ctx->wait_vsync_event, 0);  in decon_irq_handler()
610 			wake_up(&ctx->wait_vsync_queue);  in decon_irq_handler()
619 	struct decon_context *ctx = dev_get_drvdata(dev);  in decon_bind()  local
625 	ret = decon_ctx_initialize(ctx, drm_dev);  in decon_bind()
632 		ctx->configs[i].pixel_formats = decon_formats;  in decon_bind()
633 		ctx->configs[i].num_pixel_formats = ARRAY_SIZE(decon_formats);  in decon_bind()
634 		ctx->configs[i].zpos = i;  in decon_bind()
635 		ctx->configs[i].type = decon_win_types[i];  in decon_bind()
637 		ret = exynos_plane_init(drm_dev, &ctx->planes[i], i,  in decon_bind()
638 					&ctx->configs[i]);  in decon_bind()
643 	exynos_plane = &ctx->planes[DEFAULT_WIN];  in decon_bind()
644 	ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,  in decon_bind()
645 			EXYNOS_DISPLAY_TYPE_LCD, &decon_crtc_ops, ctx);  in decon_bind()
646 	if (IS_ERR(ctx->crtc)) {  in decon_bind()
647 		decon_ctx_remove(ctx);  in decon_bind()
648 		return PTR_ERR(ctx->crtc);  in decon_bind()
651 	if (ctx->encoder)  in decon_bind()
652 		exynos_dpi_bind(drm_dev, ctx->encoder);  in decon_bind()
661 	struct decon_context *ctx = dev_get_drvdata(dev);  in decon_unbind()  local
663 	decon_atomic_disable(ctx->crtc);  in decon_unbind()
665 	if (ctx->encoder)  in decon_unbind()
666 		exynos_dpi_remove(ctx->encoder);  in decon_unbind()
668 	decon_ctx_remove(ctx);  in decon_unbind()
678 	struct device *dev = &pdev->dev;  in decon_probe()
679 	struct decon_context *ctx;  in decon_probe()  local
683 	if (!dev->of_node)  in decon_probe()
684 		return -ENODEV;  in decon_probe()
686 	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);  in decon_probe()
687 	if (!ctx)  in decon_probe()
688 		return -ENOMEM;  in decon_probe()
690 	ctx->dev = dev;  in decon_probe()
691 	ctx->suspended = true;  in decon_probe()
693 	i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings");  in decon_probe()
695 		ctx->i80_if = true;  in decon_probe()
698 	ctx->regs = of_iomap(dev->of_node, 0);  in decon_probe()
699 	if (!ctx->regs)  in decon_probe()
700 		return -ENOMEM;  in decon_probe()
702 	ctx->pclk = devm_clk_get(dev, "pclk_decon0");  in decon_probe()
703 	if (IS_ERR(ctx->pclk)) {  in decon_probe()
705 		ret = PTR_ERR(ctx->pclk);  in decon_probe()
709 	ctx->aclk = devm_clk_get(dev, "aclk_decon0");  in decon_probe()
710 	if (IS_ERR(ctx->aclk)) {  in decon_probe()
712 		ret = PTR_ERR(ctx->aclk);  in decon_probe()
716 	ctx->eclk = devm_clk_get(dev, "decon0_eclk");  in decon_probe()
717 	if (IS_ERR(ctx->eclk)) {  in decon_probe()
719 		ret = PTR_ERR(ctx->eclk);  in decon_probe()
723 	ctx->vclk = devm_clk_get(dev, "decon0_vclk");  in decon_probe()
724 	if (IS_ERR(ctx->vclk)) {  in decon_probe()
726 		ret = PTR_ERR(ctx->vclk);  in decon_probe()
730 	ret =  platform_get_irq_byname(pdev, ctx->i80_if ? "lcd_sys" : "vsync");  in decon_probe()
734 	ret = devm_request_irq(dev, ret, decon_irq_handler, 0, "drm_decon", ctx);  in decon_probe()
740 	init_waitqueue_head(&ctx->wait_vsync_queue);  in decon_probe()
741 	atomic_set(&ctx->wait_vsync_event, 0);  in decon_probe()
743 	platform_set_drvdata(pdev, ctx);  in decon_probe()
745 	ctx->encoder = exynos_dpi_probe(dev);  in decon_probe()
746 	if (IS_ERR(ctx->encoder)) {  in decon_probe()
747 		ret = PTR_ERR(ctx->encoder);  in decon_probe()
763 	iounmap(ctx->regs);  in decon_probe()
770 	struct decon_context *ctx = dev_get_drvdata(&pdev->dev);  in decon_remove()  local
772 	pm_runtime_disable(&pdev->dev);  in decon_remove()
774 	iounmap(ctx->regs);  in decon_remove()
776 	component_del(&pdev->dev, &decon_component_ops);  in decon_remove()
781 	struct decon_context *ctx = dev_get_drvdata(dev);  in exynos7_decon_suspend()  local
783 	clk_disable_unprepare(ctx->vclk);  in exynos7_decon_suspend()
784 	clk_disable_unprepare(ctx->eclk);  in exynos7_decon_suspend()
785 	clk_disable_unprepare(ctx->aclk);  in exynos7_decon_suspend()
786 	clk_disable_unprepare(ctx->pclk);  in exynos7_decon_suspend()
793 	struct decon_context *ctx = dev_get_drvdata(dev);  in exynos7_decon_resume()  local
796 	ret = clk_prepare_enable(ctx->pclk);  in exynos7_decon_resume()
803 	ret = clk_prepare_enable(ctx->aclk);  in exynos7_decon_resume()
810 	ret = clk_prepare_enable(ctx->eclk);  in exynos7_decon_resume()
817 	ret = clk_prepare_enable(ctx->vclk);  in exynos7_decon_resume()
827 	clk_disable_unprepare(ctx->eclk);  in exynos7_decon_resume()
829 	clk_disable_unprepare(ctx->aclk);  in exynos7_decon_resume()
831 	clk_disable_unprepare(ctx->pclk);  in exynos7_decon_resume()
843 		.name	= "exynos-decon",