1 /* drivers/gpu/drm/exynos5433_drm_decon.c
3 * Copyright (C) 2015 Samsung Electronics Co.Ltd
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Hyungwon Hwang <human.hwang@samsung.com>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundationr
13 #include <linux/platform_device.h>
14 #include <linux/clk.h>
15 #include <linux/component.h>
16 #include <linux/of_device.h>
17 #include <linux/of_gpio.h>
18 #include <linux/pm_runtime.h>
20 #include <video/exynos5433_decon.h>
22 #include "exynos_drm_drv.h"
23 #include "exynos_drm_crtc.h"
24 #include "exynos_drm_plane.h"
25 #include "exynos_drm_iommu.h"
29 #define MIN_FB_WIDTH_FOR_16WORD_BURST 128
31 static const char * const decon_clks_name[] = {
47 enum decon_flag_bits {
54 struct decon_context {
56 struct drm_device *drm_dev;
57 struct exynos_drm_crtc *crtc;
58 struct exynos_drm_plane planes[WINDOWS_NR];
60 struct clk *clks[ARRAY_SIZE(decon_clks_name)];
63 enum decon_iftype out_type;
67 static const uint32_t decon_formats[] = {
74 static inline void decon_set_bits(struct decon_context *ctx, u32 reg, u32 mask,
77 val = (val & mask) | (readl(ctx->addr + reg) & ~mask);
78 writel(val, ctx->addr + reg);
81 static int decon_enable_vblank(struct exynos_drm_crtc *crtc)
83 struct decon_context *ctx = crtc->ctx;
86 if (test_bit(BIT_SUSPENDED, &ctx->flags))
89 if (test_and_set_bit(BIT_IRQS_ENABLED, &ctx->flags)) {
90 val = VIDINTCON0_INTEN;
91 if (ctx->out_type == IFTYPE_I80)
92 val |= VIDINTCON0_FRAMEDONE;
94 val |= VIDINTCON0_INTFRMEN;
96 writel(val, ctx->addr + DECON_VIDINTCON0);
102 static void decon_disable_vblank(struct exynos_drm_crtc *crtc)
104 struct decon_context *ctx = crtc->ctx;
106 if (test_bit(BIT_SUSPENDED, &ctx->flags))
109 if (test_and_clear_bit(BIT_IRQS_ENABLED, &ctx->flags))
110 writel(0, ctx->addr + DECON_VIDINTCON0);
113 static void decon_setup_trigger(struct decon_context *ctx)
115 u32 val = (ctx->out_type != IFTYPE_HDMI)
116 ? TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
117 TRIGCON_TE_AUTO_MASK | TRIGCON_SWTRIGEN
118 : TRIGCON_TRIGEN_PER_F | TRIGCON_TRIGEN_F |
119 TRIGCON_HWTRIGMASK_I80_RGB | TRIGCON_HWTRIGEN_I80_RGB;
120 writel(val, ctx->addr + DECON_TRIGCON);
123 static void decon_commit(struct exynos_drm_crtc *crtc)
125 struct decon_context *ctx = crtc->ctx;
126 struct drm_display_mode *m = &crtc->base.mode;
129 if (test_bit(BIT_SUSPENDED, &ctx->flags))
132 if (ctx->out_type == IFTYPE_HDMI) {
133 m->crtc_hsync_start = m->crtc_hdisplay + 10;
134 m->crtc_hsync_end = m->crtc_htotal - 92;
135 m->crtc_vsync_start = m->crtc_vdisplay + 1;
136 m->crtc_vsync_end = m->crtc_vsync_start + 1;
139 decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID, 0);
141 /* enable clock gate */
142 val = CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F;
143 writel(val, ctx->addr + DECON_CMU);
145 /* lcd on and use command if */
147 if (ctx->out_type == IFTYPE_I80)
148 val |= VIDOUT_COMMAND_IF;
150 val |= VIDOUT_RGB_IF;
151 writel(val, ctx->addr + DECON_VIDOUTCON0);
153 val = VIDTCON2_LINEVAL(m->vdisplay - 1) |
154 VIDTCON2_HOZVAL(m->hdisplay - 1);
155 writel(val, ctx->addr + DECON_VIDTCON2);
157 if (ctx->out_type != IFTYPE_I80) {
158 val = VIDTCON00_VBPD_F(
159 m->crtc_vtotal - m->crtc_vsync_end - 1) |
161 m->crtc_vsync_start - m->crtc_vdisplay - 1);
162 writel(val, ctx->addr + DECON_VIDTCON00);
164 val = VIDTCON01_VSPW_F(
165 m->crtc_vsync_end - m->crtc_vsync_start - 1);
166 writel(val, ctx->addr + DECON_VIDTCON01);
168 val = VIDTCON10_HBPD_F(
169 m->crtc_htotal - m->crtc_hsync_end - 1) |
171 m->crtc_hsync_start - m->crtc_hdisplay - 1);
172 writel(val, ctx->addr + DECON_VIDTCON10);
174 val = VIDTCON11_HSPW_F(
175 m->crtc_hsync_end - m->crtc_hsync_start - 1);
176 writel(val, ctx->addr + DECON_VIDTCON11);
179 decon_setup_trigger(ctx);
181 /* enable output and display signal */
182 decon_set_bits(ctx, DECON_VIDCON0, VIDCON0_ENVID | VIDCON0_ENVID_F, ~0);
185 static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
186 struct drm_framebuffer *fb)
190 val = readl(ctx->addr + DECON_WINCONx(win));
191 val &= ~WINCONx_BPPMODE_MASK;
193 switch (fb->pixel_format) {
194 case DRM_FORMAT_XRGB1555:
195 val |= WINCONx_BPPMODE_16BPP_I1555;
196 val |= WINCONx_HAWSWP_F;
197 val |= WINCONx_BURSTLEN_16WORD;
199 case DRM_FORMAT_RGB565:
200 val |= WINCONx_BPPMODE_16BPP_565;
201 val |= WINCONx_HAWSWP_F;
202 val |= WINCONx_BURSTLEN_16WORD;
204 case DRM_FORMAT_XRGB8888:
205 val |= WINCONx_BPPMODE_24BPP_888;
206 val |= WINCONx_WSWP_F;
207 val |= WINCONx_BURSTLEN_16WORD;
209 case DRM_FORMAT_ARGB8888:
210 val |= WINCONx_BPPMODE_32BPP_A8888;
211 val |= WINCONx_WSWP_F | WINCONx_BLD_PIX_F | WINCONx_ALPHA_SEL_F;
212 val |= WINCONx_BURSTLEN_16WORD;
215 DRM_ERROR("Proper pixel format is not set\n");
219 DRM_DEBUG_KMS("bpp = %u\n", fb->bits_per_pixel);
222 * In case of exynos, setting dma-burst to 16Word causes permanent
223 * tearing for very small buffers, e.g. cursor buffer. Burst Mode
224 * switching which is based on plane size is not recommended as
225 * plane size varies a lot towards the end of the screen and rapid
226 * movement causes unstable DMA which results into iommu crash/tear.
229 if (fb->width < MIN_FB_WIDTH_FOR_16WORD_BURST) {
230 val &= ~WINCONx_BURSTLEN_MASK;
231 val |= WINCONx_BURSTLEN_8WORD;
234 writel(val, ctx->addr + DECON_WINCONx(win));
237 static void decon_shadow_protect_win(struct decon_context *ctx, int win,
240 decon_set_bits(ctx, DECON_SHADOWCON, SHADOWCON_Wx_PROTECT(win),
244 static void decon_atomic_begin(struct exynos_drm_crtc *crtc,
245 struct exynos_drm_plane *plane)
247 struct decon_context *ctx = crtc->ctx;
249 if (test_bit(BIT_SUSPENDED, &ctx->flags))
252 decon_shadow_protect_win(ctx, plane->zpos, true);
255 #define BIT_VAL(x, e, s) (((x) & ((1 << ((e) - (s) + 1)) - 1)) << (s))
256 #define COORDINATE_X(x) BIT_VAL((x), 23, 12)
257 #define COORDINATE_Y(x) BIT_VAL((x), 11, 0)
259 static void decon_update_plane(struct exynos_drm_crtc *crtc,
260 struct exynos_drm_plane *plane)
262 struct decon_context *ctx = crtc->ctx;
263 struct drm_plane_state *state = plane->base.state;
264 unsigned int win = plane->zpos;
265 unsigned int bpp = state->fb->bits_per_pixel >> 3;
266 unsigned int pitch = state->fb->pitches[0];
269 if (test_bit(BIT_SUSPENDED, &ctx->flags))
272 val = COORDINATE_X(plane->crtc_x) | COORDINATE_Y(plane->crtc_y);
273 writel(val, ctx->addr + DECON_VIDOSDxA(win));
275 val = COORDINATE_X(plane->crtc_x + plane->crtc_w - 1) |
276 COORDINATE_Y(plane->crtc_y + plane->crtc_h - 1);
277 writel(val, ctx->addr + DECON_VIDOSDxB(win));
279 val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
280 VIDOSD_Wx_ALPHA_B_F(0x0);
281 writel(val, ctx->addr + DECON_VIDOSDxC(win));
283 val = VIDOSD_Wx_ALPHA_R_F(0x0) | VIDOSD_Wx_ALPHA_G_F(0x0) |
284 VIDOSD_Wx_ALPHA_B_F(0x0);
285 writel(val, ctx->addr + DECON_VIDOSDxD(win));
287 writel(plane->dma_addr[0], ctx->addr + DECON_VIDW0xADD0B0(win));
289 val = plane->dma_addr[0] + pitch * plane->crtc_h;
290 writel(val, ctx->addr + DECON_VIDW0xADD1B0(win));
292 if (ctx->out_type != IFTYPE_HDMI)
293 val = BIT_VAL(pitch - plane->crtc_w * bpp, 27, 14)
294 | BIT_VAL(plane->crtc_w * bpp, 13, 0);
296 val = BIT_VAL(pitch - plane->crtc_w * bpp, 29, 15)
297 | BIT_VAL(plane->crtc_w * bpp, 14, 0);
298 writel(val, ctx->addr + DECON_VIDW0xADD2(win));
300 decon_win_set_pixfmt(ctx, win, state->fb);
303 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
305 /* standalone update */
306 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
309 static void decon_disable_plane(struct exynos_drm_crtc *crtc,
310 struct exynos_drm_plane *plane)
312 struct decon_context *ctx = crtc->ctx;
313 unsigned int win = plane->zpos;
315 if (test_bit(BIT_SUSPENDED, &ctx->flags))
318 decon_shadow_protect_win(ctx, win, true);
321 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
323 decon_shadow_protect_win(ctx, win, false);
325 /* standalone update */
326 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
329 static void decon_atomic_flush(struct exynos_drm_crtc *crtc,
330 struct exynos_drm_plane *plane)
332 struct decon_context *ctx = crtc->ctx;
334 if (test_bit(BIT_SUSPENDED, &ctx->flags))
337 decon_shadow_protect_win(ctx, plane->zpos, false);
339 if (ctx->out_type == IFTYPE_I80)
340 set_bit(BIT_WIN_UPDATED, &ctx->flags);
343 static void decon_swreset(struct decon_context *ctx)
347 writel(0, ctx->addr + DECON_VIDCON0);
348 for (tries = 2000; tries; --tries) {
349 if (~readl(ctx->addr + DECON_VIDCON0) & VIDCON0_STOP_STATUS)
354 WARN(tries == 0, "failed to disable DECON\n");
356 writel(VIDCON0_SWRESET, ctx->addr + DECON_VIDCON0);
357 for (tries = 2000; tries; --tries) {
358 if (~readl(ctx->addr + DECON_VIDCON0) & VIDCON0_SWRESET)
363 WARN(tries == 0, "failed to software reset DECON\n");
365 if (ctx->out_type != IFTYPE_HDMI)
368 writel(VIDCON0_CLKVALUP | VIDCON0_VLCKFREE, ctx->addr + DECON_VIDCON0);
369 decon_set_bits(ctx, DECON_CMU,
370 CMU_CLKGAGE_MODE_SFR_F | CMU_CLKGAGE_MODE_MEM_F, ~0);
371 writel(VIDCON1_VCLK_RUN_VDEN_DISABLE, ctx->addr + DECON_VIDCON1);
372 writel(CRCCTRL_CRCEN | CRCCTRL_CRCSTART_F | CRCCTRL_CRCCLKEN,
373 ctx->addr + DECON_CRCCTRL);
374 decon_setup_trigger(ctx);
377 static void decon_enable(struct exynos_drm_crtc *crtc)
379 struct decon_context *ctx = crtc->ctx;
383 if (!test_and_clear_bit(BIT_SUSPENDED, &ctx->flags))
386 pm_runtime_get_sync(ctx->dev);
388 set_bit(BIT_CLKS_ENABLED, &ctx->flags);
390 /* if vblank was enabled status, enable it again. */
391 if (test_and_clear_bit(BIT_IRQS_ENABLED, &ctx->flags))
392 decon_enable_vblank(ctx->crtc);
394 decon_commit(ctx->crtc);
396 set_bit(BIT_SUSPENDED, &ctx->flags);
399 static void decon_disable(struct exynos_drm_crtc *crtc)
401 struct decon_context *ctx = crtc->ctx;
404 if (test_bit(BIT_SUSPENDED, &ctx->flags))
408 * We need to make sure that all windows are disabled before we
409 * suspend that connector. Otherwise we might try to scan from
410 * a destroyed buffer later.
412 for (i = ctx->first_win; i < WINDOWS_NR; i++)
413 decon_disable_plane(crtc, &ctx->planes[i]);
417 clear_bit(BIT_CLKS_ENABLED, &ctx->flags);
419 pm_runtime_put_sync(ctx->dev);
421 set_bit(BIT_SUSPENDED, &ctx->flags);
424 void decon_te_irq_handler(struct exynos_drm_crtc *crtc)
426 struct decon_context *ctx = crtc->ctx;
428 if (!test_bit(BIT_CLKS_ENABLED, &ctx->flags))
431 if (test_and_clear_bit(BIT_WIN_UPDATED, &ctx->flags))
432 decon_set_bits(ctx, DECON_TRIGCON, TRIGCON_SWTRIGCMD, ~0);
434 drm_crtc_handle_vblank(&ctx->crtc->base);
437 static void decon_clear_channels(struct exynos_drm_crtc *crtc)
439 struct decon_context *ctx = crtc->ctx;
442 DRM_DEBUG_KMS("%s\n", __FILE__);
444 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
445 ret = clk_prepare_enable(ctx->clks[i]);
450 for (win = 0; win < WINDOWS_NR; win++) {
451 decon_shadow_protect_win(ctx, win, true);
452 decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
453 decon_shadow_protect_win(ctx, win, false);
454 decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
456 /* TODO: wait for possible vsync */
461 clk_disable_unprepare(ctx->clks[i]);
464 static struct exynos_drm_crtc_ops decon_crtc_ops = {
465 .enable = decon_enable,
466 .disable = decon_disable,
467 .enable_vblank = decon_enable_vblank,
468 .disable_vblank = decon_disable_vblank,
469 .atomic_begin = decon_atomic_begin,
470 .update_plane = decon_update_plane,
471 .disable_plane = decon_disable_plane,
472 .atomic_flush = decon_atomic_flush,
473 .te_handler = decon_te_irq_handler,
476 static int decon_bind(struct device *dev, struct device *master, void *data)
478 struct decon_context *ctx = dev_get_drvdata(dev);
479 struct drm_device *drm_dev = data;
480 struct exynos_drm_private *priv = drm_dev->dev_private;
481 struct exynos_drm_plane *exynos_plane;
482 enum exynos_drm_output_type out_type;
483 enum drm_plane_type type;
487 ctx->drm_dev = drm_dev;
488 ctx->pipe = priv->pipe++;
490 for (win = ctx->first_win; win < WINDOWS_NR; win++) {
491 int tmp = (win == ctx->first_win) ? 0 : win;
493 type = exynos_plane_get_type(tmp, CURSOR_WIN);
494 ret = exynos_plane_init(drm_dev, &ctx->planes[win],
495 1 << ctx->pipe, type, decon_formats,
496 ARRAY_SIZE(decon_formats), win);
501 exynos_plane = &ctx->planes[ctx->first_win];
502 out_type = (ctx->out_type == IFTYPE_HDMI) ? EXYNOS_DISPLAY_TYPE_HDMI
503 : EXYNOS_DISPLAY_TYPE_LCD;
504 ctx->crtc = exynos_drm_crtc_create(drm_dev, &exynos_plane->base,
506 &decon_crtc_ops, ctx);
507 if (IS_ERR(ctx->crtc)) {
508 ret = PTR_ERR(ctx->crtc);
512 decon_clear_channels(ctx->crtc);
514 ret = drm_iommu_attach_device(drm_dev, dev);
524 static void decon_unbind(struct device *dev, struct device *master, void *data)
526 struct decon_context *ctx = dev_get_drvdata(dev);
528 decon_disable(ctx->crtc);
530 /* detach this sub driver from iommu mapping if supported. */
531 drm_iommu_detach_device(ctx->drm_dev, ctx->dev);
534 static const struct component_ops decon_component_ops = {
536 .unbind = decon_unbind,
539 static irqreturn_t decon_irq_handler(int irq, void *dev_id)
541 struct decon_context *ctx = dev_id;
545 if (!test_bit(BIT_CLKS_ENABLED, &ctx->flags))
548 val = readl(ctx->addr + DECON_VIDINTCON1);
549 val &= VIDINTCON1_INTFRMDONEPEND | VIDINTCON1_INTFRMPEND;
552 for (win = ctx->first_win; win < WINDOWS_NR ; win++) {
553 struct exynos_drm_plane *plane = &ctx->planes[win];
555 if (!plane->pending_fb)
558 exynos_drm_crtc_finish_update(ctx->crtc, plane);
562 writel(val, ctx->addr + DECON_VIDINTCON1);
570 static int exynos5433_decon_suspend(struct device *dev)
572 struct decon_context *ctx = dev_get_drvdata(dev);
575 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++)
576 clk_disable_unprepare(ctx->clks[i]);
581 static int exynos5433_decon_resume(struct device *dev)
583 struct decon_context *ctx = dev_get_drvdata(dev);
586 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
587 ret = clk_prepare_enable(ctx->clks[i]);
596 clk_disable_unprepare(ctx->clks[i]);
602 static const struct dev_pm_ops exynos5433_decon_pm_ops = {
603 SET_RUNTIME_PM_OPS(exynos5433_decon_suspend, exynos5433_decon_resume,
607 static const struct of_device_id exynos5433_decon_driver_dt_match[] = {
609 .compatible = "samsung,exynos5433-decon",
610 .data = (void *)IFTYPE_RGB
613 .compatible = "samsung,exynos5433-decon-tv",
614 .data = (void *)IFTYPE_HDMI
618 MODULE_DEVICE_TABLE(of, exynos5433_decon_driver_dt_match);
620 static int exynos5433_decon_probe(struct platform_device *pdev)
622 const struct of_device_id *of_id;
623 struct device *dev = &pdev->dev;
624 struct decon_context *ctx;
625 struct resource *res;
629 ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
633 __set_bit(BIT_SUSPENDED, &ctx->flags);
636 of_id = of_match_device(exynos5433_decon_driver_dt_match, &pdev->dev);
637 ctx->out_type = (enum decon_iftype)of_id->data;
639 if (ctx->out_type == IFTYPE_HDMI)
641 else if (of_get_child_by_name(dev->of_node, "i80-if-timings"))
642 ctx->out_type = IFTYPE_I80;
644 for (i = 0; i < ARRAY_SIZE(decon_clks_name); i++) {
647 clk = devm_clk_get(ctx->dev, decon_clks_name[i]);
654 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
656 dev_err(dev, "cannot find IO resource\n");
660 ctx->addr = devm_ioremap_resource(dev, res);
661 if (IS_ERR(ctx->addr)) {
662 dev_err(dev, "ioremap failed\n");
663 return PTR_ERR(ctx->addr);
666 res = platform_get_resource_byname(pdev, IORESOURCE_IRQ,
667 (ctx->out_type == IFTYPE_I80) ? "lcd_sys" : "vsync");
669 dev_err(dev, "cannot find IRQ resource\n");
673 ret = devm_request_irq(dev, res->start, decon_irq_handler, 0,
676 dev_err(dev, "lcd_sys irq request failed\n");
680 platform_set_drvdata(pdev, ctx);
682 pm_runtime_enable(dev);
684 ret = component_add(dev, &decon_component_ops);
686 goto err_disable_pm_runtime;
690 err_disable_pm_runtime:
691 pm_runtime_disable(dev);
696 static int exynos5433_decon_remove(struct platform_device *pdev)
698 pm_runtime_disable(&pdev->dev);
700 component_del(&pdev->dev, &decon_component_ops);
705 struct platform_driver exynos5433_decon_driver = {
706 .probe = exynos5433_decon_probe,
707 .remove = exynos5433_decon_remove,
709 .name = "exynos5433-decon",
710 .pm = &exynos5433_decon_pm_ops,
711 .of_match_table = exynos5433_decon_driver_dt_match,