2 * Copyright (c) 2014, The Linux Foundation. All rights reserved.
3 * Copyright (C) 2013 Red Hat
4 * Author: Rob Clark <robdclark@gmail.com>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program. If not, see <http://www.gnu.org/licenses/>.
24 static const char *iommu_ports[] = {
28 static int mdp5_hw_init(struct msm_kms *kms)
30 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
31 struct drm_device *dev = mdp5_kms->dev;
34 pm_runtime_get_sync(dev->dev);
36 /* Magic unknown register writes:
38 * W VBIF:0x004 00000001 (mdss_mdp.c:839)
39 * W MDP5:0x2e0 0xe9 (mdss_mdp.c:839)
40 * W MDP5:0x2e4 0x55 (mdss_mdp.c:839)
41 * W MDP5:0x3ac 0xc0000ccc (mdss_mdp.c:839)
42 * W MDP5:0x3b4 0xc0000ccc (mdss_mdp.c:839)
43 * W MDP5:0x3bc 0xcccccc (mdss_mdp.c:839)
44 * W MDP5:0x4a8 0xcccc0c0 (mdss_mdp.c:839)
45 * W MDP5:0x4b0 0xccccc0c0 (mdss_mdp.c:839)
46 * W MDP5:0x4b8 0xccccc000 (mdss_mdp.c:839)
48 * Downstream fbdev driver gets these register offsets/values
49 * from DT.. not really sure what these registers are or if
50 * different values for different boards/SoC's, etc. I guess
51 * they are the golden registers.
53 * Not setting these does not seem to cause any problem. But
54 * we may be getting lucky with the bootloader initializing
55 * them for us. OTOH, if we can always count on the bootloader
56 * setting the golden registers, then perhaps we don't need to
60 spin_lock_irqsave(&mdp5_kms->resource_lock, flags);
61 mdp5_write(mdp5_kms, REG_MDP5_MDP_DISP_INTF_SEL(0), 0);
62 spin_unlock_irqrestore(&mdp5_kms->resource_lock, flags);
64 mdp5_ctlm_hw_reset(mdp5_kms->ctlm);
66 pm_runtime_put_sync(dev->dev);
71 static void mdp5_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state)
73 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
74 mdp5_enable(mdp5_kms);
77 static void mdp5_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state)
80 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
81 int nplanes = mdp5_kms->dev->mode_config.num_total_plane;
83 for (i = 0; i < nplanes; i++) {
84 struct drm_plane *plane = state->planes[i];
85 struct drm_plane_state *plane_state = state->plane_states[i];
90 mdp5_plane_complete_commit(plane, plane_state);
93 mdp5_disable(mdp5_kms);
96 static void mdp5_wait_for_crtc_commit_done(struct msm_kms *kms,
97 struct drm_crtc *crtc)
99 mdp5_crtc_wait_for_commit_done(crtc);
102 static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
103 struct drm_encoder *encoder)
108 static int mdp5_set_split_display(struct msm_kms *kms,
109 struct drm_encoder *encoder,
110 struct drm_encoder *slave_encoder,
114 return mdp5_cmd_encoder_set_split_display(encoder,
117 return mdp5_encoder_set_split_display(encoder, slave_encoder);
120 static void mdp5_preclose(struct msm_kms *kms, struct drm_file *file)
122 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
123 struct msm_drm_private *priv = mdp5_kms->dev->dev_private;
126 for (i = 0; i < priv->num_crtcs; i++)
127 mdp5_crtc_cancel_pending_flip(priv->crtcs[i], file);
130 static void mdp5_destroy(struct msm_kms *kms)
132 struct mdp5_kms *mdp5_kms = to_mdp5_kms(to_mdp_kms(kms));
133 struct msm_mmu *mmu = mdp5_kms->mmu;
135 mdp5_irq_domain_fini(mdp5_kms);
138 mmu->funcs->detach(mmu, iommu_ports, ARRAY_SIZE(iommu_ports));
139 mmu->funcs->destroy(mmu);
143 mdp5_ctlm_destroy(mdp5_kms->ctlm);
145 mdp5_smp_destroy(mdp5_kms->smp);
147 mdp5_cfg_destroy(mdp5_kms->cfg);
152 static const struct mdp_kms_funcs kms_funcs = {
154 .hw_init = mdp5_hw_init,
155 .irq_preinstall = mdp5_irq_preinstall,
156 .irq_postinstall = mdp5_irq_postinstall,
157 .irq_uninstall = mdp5_irq_uninstall,
159 .enable_vblank = mdp5_enable_vblank,
160 .disable_vblank = mdp5_disable_vblank,
161 .prepare_commit = mdp5_prepare_commit,
162 .complete_commit = mdp5_complete_commit,
163 .wait_for_crtc_commit_done = mdp5_wait_for_crtc_commit_done,
164 .get_format = mdp_get_format,
165 .round_pixclk = mdp5_round_pixclk,
166 .set_split_display = mdp5_set_split_display,
167 .preclose = mdp5_preclose,
168 .destroy = mdp5_destroy,
170 .set_irqmask = mdp5_set_irqmask,
173 int mdp5_disable(struct mdp5_kms *mdp5_kms)
177 clk_disable_unprepare(mdp5_kms->ahb_clk);
178 clk_disable_unprepare(mdp5_kms->axi_clk);
179 clk_disable_unprepare(mdp5_kms->core_clk);
180 if (mdp5_kms->lut_clk)
181 clk_disable_unprepare(mdp5_kms->lut_clk);
186 int mdp5_enable(struct mdp5_kms *mdp5_kms)
190 clk_prepare_enable(mdp5_kms->ahb_clk);
191 clk_prepare_enable(mdp5_kms->axi_clk);
192 clk_prepare_enable(mdp5_kms->core_clk);
193 if (mdp5_kms->lut_clk)
194 clk_prepare_enable(mdp5_kms->lut_clk);
199 static struct drm_encoder *construct_encoder(struct mdp5_kms *mdp5_kms,
200 enum mdp5_intf_type intf_type, int intf_num,
201 enum mdp5_intf_mode intf_mode, struct mdp5_ctl *ctl)
203 struct drm_device *dev = mdp5_kms->dev;
204 struct msm_drm_private *priv = dev->dev_private;
205 struct drm_encoder *encoder;
206 struct mdp5_interface intf = {
212 if ((intf_type == INTF_DSI) &&
213 (intf_mode == MDP5_INTF_DSI_MODE_COMMAND))
214 encoder = mdp5_cmd_encoder_init(dev, &intf, ctl);
216 encoder = mdp5_encoder_init(dev, &intf, ctl);
218 if (IS_ERR(encoder)) {
219 dev_err(dev->dev, "failed to construct encoder\n");
223 encoder->possible_crtcs = (1 << priv->num_crtcs) - 1;
224 priv->encoders[priv->num_encoders++] = encoder;
229 static int get_dsi_id_from_intf(const struct mdp5_cfg_hw *hw_cfg, int intf_num)
231 const enum mdp5_intf_type *intfs = hw_cfg->intf.connect;
232 const int intf_cnt = ARRAY_SIZE(hw_cfg->intf.connect);
235 for (i = 0; i < intf_cnt; i++) {
236 if (intfs[i] == INTF_DSI) {
247 static int modeset_init_intf(struct mdp5_kms *mdp5_kms, int intf_num)
249 struct drm_device *dev = mdp5_kms->dev;
250 struct msm_drm_private *priv = dev->dev_private;
251 const struct mdp5_cfg_hw *hw_cfg =
252 mdp5_cfg_get_hw_config(mdp5_kms->cfg);
253 enum mdp5_intf_type intf_type = hw_cfg->intf.connect[intf_num];
254 struct mdp5_ctl_manager *ctlm = mdp5_kms->ctlm;
255 struct mdp5_ctl *ctl;
256 struct drm_encoder *encoder;
266 ctl = mdp5_ctlm_request(ctlm, intf_num);
272 encoder = construct_encoder(mdp5_kms, INTF_eDP, intf_num,
273 MDP5_INTF_MODE_NONE, ctl);
274 if (IS_ERR(encoder)) {
275 ret = PTR_ERR(encoder);
279 ret = msm_edp_modeset_init(priv->edp, dev, encoder);
285 ctl = mdp5_ctlm_request(ctlm, intf_num);
291 encoder = construct_encoder(mdp5_kms, INTF_HDMI, intf_num,
292 MDP5_INTF_MODE_NONE, ctl);
293 if (IS_ERR(encoder)) {
294 ret = PTR_ERR(encoder);
298 ret = hdmi_modeset_init(priv->hdmi, dev, encoder);
302 int dsi_id = get_dsi_id_from_intf(hw_cfg, intf_num);
303 struct drm_encoder *dsi_encs[MSM_DSI_ENCODER_NUM];
304 enum mdp5_intf_mode mode;
307 if ((dsi_id >= ARRAY_SIZE(priv->dsi)) || (dsi_id < 0)) {
308 dev_err(dev->dev, "failed to find dsi from intf %d\n",
314 if (!priv->dsi[dsi_id])
317 ctl = mdp5_ctlm_request(ctlm, intf_num);
323 for (i = 0; i < MSM_DSI_ENCODER_NUM; i++) {
324 mode = (i == MSM_DSI_CMD_ENCODER_ID) ?
325 MDP5_INTF_DSI_MODE_COMMAND :
326 MDP5_INTF_DSI_MODE_VIDEO;
327 dsi_encs[i] = construct_encoder(mdp5_kms, INTF_DSI,
328 intf_num, mode, ctl);
329 if (IS_ERR(dsi_encs[i])) {
330 ret = PTR_ERR(dsi_encs[i]);
335 ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, dsi_encs);
339 dev_err(dev->dev, "unknown intf: %d\n", intf_type);
347 static int modeset_init(struct mdp5_kms *mdp5_kms)
349 static const enum mdp5_pipe crtcs[] = {
350 SSPP_RGB0, SSPP_RGB1, SSPP_RGB2, SSPP_RGB3,
352 static const enum mdp5_pipe vig_planes[] = {
353 SSPP_VIG0, SSPP_VIG1, SSPP_VIG2, SSPP_VIG3,
355 static const enum mdp5_pipe dma_planes[] = {
356 SSPP_DMA0, SSPP_DMA1,
358 struct drm_device *dev = mdp5_kms->dev;
359 struct msm_drm_private *priv = dev->dev_private;
360 const struct mdp5_cfg_hw *hw_cfg;
363 hw_cfg = mdp5_cfg_get_hw_config(mdp5_kms->cfg);
365 /* register our interrupt-controller for hdmi/eDP/dsi/etc
366 * to use for irqs routed through mdp:
368 ret = mdp5_irq_domain_init(mdp5_kms);
372 /* construct CRTCs and their private planes: */
373 for (i = 0; i < hw_cfg->pipe_rgb.count; i++) {
374 struct drm_plane *plane;
375 struct drm_crtc *crtc;
377 plane = mdp5_plane_init(dev, crtcs[i], true,
378 hw_cfg->pipe_rgb.base[i], hw_cfg->pipe_rgb.caps);
380 ret = PTR_ERR(plane);
381 dev_err(dev->dev, "failed to construct plane for %s (%d)\n",
382 pipe2name(crtcs[i]), ret);
386 crtc = mdp5_crtc_init(dev, plane, i);
389 dev_err(dev->dev, "failed to construct crtc for %s (%d)\n",
390 pipe2name(crtcs[i]), ret);
393 priv->crtcs[priv->num_crtcs++] = crtc;
396 /* Construct video planes: */
397 for (i = 0; i < hw_cfg->pipe_vig.count; i++) {
398 struct drm_plane *plane;
400 plane = mdp5_plane_init(dev, vig_planes[i], false,
401 hw_cfg->pipe_vig.base[i], hw_cfg->pipe_vig.caps);
403 ret = PTR_ERR(plane);
404 dev_err(dev->dev, "failed to construct %s plane: %d\n",
405 pipe2name(vig_planes[i]), ret);
411 for (i = 0; i < hw_cfg->pipe_dma.count; i++) {
412 struct drm_plane *plane;
414 plane = mdp5_plane_init(dev, dma_planes[i], false,
415 hw_cfg->pipe_dma.base[i], hw_cfg->pipe_dma.caps);
417 ret = PTR_ERR(plane);
418 dev_err(dev->dev, "failed to construct %s plane: %d\n",
419 pipe2name(dma_planes[i]), ret);
424 /* Construct encoders and modeset initialize connector devices
425 * for each external display interface.
427 for (i = 0; i < ARRAY_SIZE(hw_cfg->intf.connect); i++) {
428 ret = modeset_init_intf(mdp5_kms, i);
439 static void read_hw_revision(struct mdp5_kms *mdp5_kms,
440 uint32_t *major, uint32_t *minor)
444 mdp5_enable(mdp5_kms);
445 version = mdp5_read(mdp5_kms, REG_MDSS_HW_VERSION);
446 mdp5_disable(mdp5_kms);
448 *major = FIELD(version, MDSS_HW_VERSION_MAJOR);
449 *minor = FIELD(version, MDSS_HW_VERSION_MINOR);
451 DBG("MDP5 version v%d.%d", *major, *minor);
454 static int get_clk(struct platform_device *pdev, struct clk **clkp,
455 const char *name, bool mandatory)
457 struct device *dev = &pdev->dev;
458 struct clk *clk = devm_clk_get(dev, name);
459 if (IS_ERR(clk) && mandatory) {
460 dev_err(dev, "failed to get %s (%ld)\n", name, PTR_ERR(clk));
464 DBG("skipping %s", name);
471 static struct drm_encoder *get_encoder_from_crtc(struct drm_crtc *crtc)
473 struct drm_device *dev = crtc->dev;
474 struct drm_encoder *encoder;
476 drm_for_each_encoder(encoder, dev)
477 if (encoder->crtc == crtc)
483 static int mdp5_get_scanoutpos(struct drm_device *dev, unsigned int pipe,
484 unsigned int flags, int *vpos, int *hpos,
485 ktime_t *stime, ktime_t *etime,
486 const struct drm_display_mode *mode)
488 struct msm_drm_private *priv = dev->dev_private;
489 struct drm_crtc *crtc;
490 struct drm_encoder *encoder;
491 int line, vsw, vbp, vactive_start, vactive_end, vfp_end;
494 crtc = priv->crtcs[pipe];
496 DRM_ERROR("Invalid crtc %d\n", pipe);
500 encoder = get_encoder_from_crtc(crtc);
502 DRM_ERROR("no encoder found for crtc %d\n", pipe);
506 ret |= DRM_SCANOUTPOS_VALID | DRM_SCANOUTPOS_ACCURATE;
508 vsw = mode->crtc_vsync_end - mode->crtc_vsync_start;
509 vbp = mode->crtc_vtotal - mode->crtc_vsync_end;
512 * the line counter is 1 at the start of the VSYNC pulse and VTOTAL at
513 * the end of VFP. Translate the porch values relative to the line
517 vactive_start = vsw + vbp + 1;
519 vactive_end = vactive_start + mode->crtc_vdisplay;
521 /* last scan line before VSYNC */
522 vfp_end = mode->crtc_vtotal;
525 *stime = ktime_get();
527 line = mdp5_encoder_get_linecount(encoder);
529 if (line < vactive_start) {
530 line -= vactive_start;
531 ret |= DRM_SCANOUTPOS_IN_VBLANK;
532 } else if (line > vactive_end) {
533 line = line - vfp_end - vactive_start;
534 ret |= DRM_SCANOUTPOS_IN_VBLANK;
536 line -= vactive_start;
543 *etime = ktime_get();
548 static int mdp5_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
550 struct timeval *vblank_time,
553 struct msm_drm_private *priv = dev->dev_private;
554 struct drm_crtc *crtc;
556 if (pipe < 0 || pipe >= priv->num_crtcs) {
557 DRM_ERROR("Invalid crtc %d\n", pipe);
561 crtc = priv->crtcs[pipe];
563 DRM_ERROR("Invalid crtc %d\n", pipe);
567 return drm_calc_vbltimestamp_from_scanoutpos(dev, pipe, max_error,
572 static u32 mdp5_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
574 struct msm_drm_private *priv = dev->dev_private;
575 struct drm_crtc *crtc;
576 struct drm_encoder *encoder;
578 if (pipe < 0 || pipe >= priv->num_crtcs)
581 crtc = priv->crtcs[pipe];
585 encoder = get_encoder_from_crtc(crtc);
589 return mdp5_encoder_get_framecount(encoder);
592 struct msm_kms *mdp5_kms_init(struct drm_device *dev)
594 struct platform_device *pdev = dev->platformdev;
595 struct mdp5_cfg *config;
596 struct mdp5_kms *mdp5_kms;
597 struct msm_kms *kms = NULL;
599 uint32_t major, minor;
602 mdp5_kms = kzalloc(sizeof(*mdp5_kms), GFP_KERNEL);
604 dev_err(dev->dev, "failed to allocate kms\n");
609 spin_lock_init(&mdp5_kms->resource_lock);
611 mdp_kms_init(&mdp5_kms->base, &kms_funcs);
613 kms = &mdp5_kms->base.base;
617 /* mdp5_kms->mmio actually represents the MDSS base address */
618 mdp5_kms->mmio = msm_ioremap(pdev, "mdp_phys", "MDP5");
619 if (IS_ERR(mdp5_kms->mmio)) {
620 ret = PTR_ERR(mdp5_kms->mmio);
624 mdp5_kms->vbif = msm_ioremap(pdev, "vbif_phys", "VBIF");
625 if (IS_ERR(mdp5_kms->vbif)) {
626 ret = PTR_ERR(mdp5_kms->vbif);
630 mdp5_kms->vdd = devm_regulator_get(&pdev->dev, "vdd");
631 if (IS_ERR(mdp5_kms->vdd)) {
632 ret = PTR_ERR(mdp5_kms->vdd);
636 ret = regulator_enable(mdp5_kms->vdd);
638 dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret);
642 /* mandatory clocks: */
643 ret = get_clk(pdev, &mdp5_kms->axi_clk, "bus_clk", true);
646 ret = get_clk(pdev, &mdp5_kms->ahb_clk, "iface_clk", true);
649 ret = get_clk(pdev, &mdp5_kms->src_clk, "core_clk_src", true);
652 ret = get_clk(pdev, &mdp5_kms->core_clk, "core_clk", true);
655 ret = get_clk(pdev, &mdp5_kms->vsync_clk, "vsync_clk", true);
659 /* optional clocks: */
660 get_clk(pdev, &mdp5_kms->lut_clk, "lut_clk", false);
662 /* we need to set a default rate before enabling. Set a safe
663 * rate first, then figure out hw revision, and then set a
666 clk_set_rate(mdp5_kms->src_clk, 200000000);
668 read_hw_revision(mdp5_kms, &major, &minor);
670 mdp5_kms->cfg = mdp5_cfg_init(mdp5_kms, major, minor);
671 if (IS_ERR(mdp5_kms->cfg)) {
672 ret = PTR_ERR(mdp5_kms->cfg);
673 mdp5_kms->cfg = NULL;
677 config = mdp5_cfg_get_config(mdp5_kms->cfg);
678 mdp5_kms->caps = config->hw->mdp.caps;
680 /* TODO: compute core clock rate at runtime */
681 clk_set_rate(mdp5_kms->src_clk, config->hw->max_clk);
684 * Some chipsets have a Shared Memory Pool (SMP), while others
685 * have dedicated latency buffering per source pipe instead;
686 * this section initializes the SMP:
688 if (mdp5_kms->caps & MDP_CAP_SMP) {
689 mdp5_kms->smp = mdp5_smp_init(mdp5_kms->dev, &config->hw->smp);
690 if (IS_ERR(mdp5_kms->smp)) {
691 ret = PTR_ERR(mdp5_kms->smp);
692 mdp5_kms->smp = NULL;
697 mdp5_kms->ctlm = mdp5_ctlm_init(dev, mdp5_kms->mmio, mdp5_kms->cfg);
698 if (IS_ERR(mdp5_kms->ctlm)) {
699 ret = PTR_ERR(mdp5_kms->ctlm);
700 mdp5_kms->ctlm = NULL;
704 /* make sure things are off before attaching iommu (bootloader could
705 * have left things on, in which case we'll start getting faults if
708 mdp5_enable(mdp5_kms);
709 for (i = 0; i < MDP5_INTF_NUM_MAX; i++) {
710 if (mdp5_cfg_intf_is_virtual(config->hw->intf.connect[i]) ||
711 !config->hw->intf.base[i])
713 mdp5_write(mdp5_kms, REG_MDP5_INTF_TIMING_ENGINE_EN(i), 0);
715 mdp5_write(mdp5_kms, REG_MDP5_INTF_FRAME_LINE_COUNT_EN(i), 0x3);
717 mdp5_disable(mdp5_kms);
720 if (config->platform.iommu) {
721 mmu = msm_iommu_new(&pdev->dev, config->platform.iommu);
724 dev_err(dev->dev, "failed to init iommu: %d\n", ret);
725 iommu_domain_free(config->platform.iommu);
729 ret = mmu->funcs->attach(mmu, iommu_ports,
730 ARRAY_SIZE(iommu_ports));
732 dev_err(dev->dev, "failed to attach iommu: %d\n", ret);
733 mmu->funcs->destroy(mmu);
737 dev_info(dev->dev, "no iommu, fallback to phys "
738 "contig buffers for scanout\n");
743 mdp5_kms->id = msm_register_mmu(dev, mmu);
744 if (mdp5_kms->id < 0) {
746 dev_err(dev->dev, "failed to register mdp5 iommu: %d\n", ret);
750 ret = modeset_init(mdp5_kms);
752 dev_err(dev->dev, "modeset_init failed: %d\n", ret);
756 dev->mode_config.min_width = 0;
757 dev->mode_config.min_height = 0;
758 dev->mode_config.max_width = config->hw->lm.max_width;
759 dev->mode_config.max_height = config->hw->lm.max_height;
761 dev->driver->get_vblank_timestamp = mdp5_get_vblank_timestamp;
762 dev->driver->get_scanout_position = mdp5_get_scanoutpos;
763 dev->driver->get_vblank_counter = mdp5_get_vblank_counter;
764 dev->max_vblank_count = 0xffffffff;
765 dev->vblank_disable_immediate = true;