// SPDX-License-Identifier: GPL-2.0-only /* * HDMI interface DSS driver for TI's OMAP4 family of SoCs. * * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/ * Authors: Yong Zhi * Mythri pk */ #define DSS_SUBSYS_NAME "HDMI" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "omapdss.h" #include "hdmi4_core.h" #include "hdmi4_cec.h" #include "dss.h" #include "hdmi.h" static int hdmi_runtime_get(struct omap_hdmi *hdmi) { int r; DSSDBG("hdmi_runtime_get\n"); r = pm_runtime_get_sync(&hdmi->pdev->dev); if (WARN_ON(r < 0)) { pm_runtime_put_noidle(&hdmi->pdev->dev); return r; } return 0; } static void hdmi_runtime_put(struct omap_hdmi *hdmi) { int r; DSSDBG("hdmi_runtime_put\n"); r = pm_runtime_put_sync(&hdmi->pdev->dev); WARN_ON(r < 0 && r != -ENOSYS); } static irqreturn_t hdmi_irq_handler(int irq, void *data) { struct omap_hdmi *hdmi = data; struct hdmi_wp_data *wp = &hdmi->wp; u32 irqstatus; irqstatus = hdmi_wp_get_irqstatus(wp); hdmi_wp_set_irqstatus(wp, irqstatus); if ((irqstatus & HDMI_IRQ_LINK_CONNECT) && irqstatus & HDMI_IRQ_LINK_DISCONNECT) { /* * If we get both connect and disconnect interrupts at the same * time, turn off the PHY, clear interrupts, and restart, which * raises connect interrupt if a cable is connected, or nothing * if cable is not connected. */ hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF); hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT); hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) { hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON); } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) { hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); } if (irqstatus & HDMI_IRQ_CORE) { u32 intr4 = hdmi_read_reg(hdmi->core.base, HDMI_CORE_SYS_INTR4); hdmi_write_reg(hdmi->core.base, HDMI_CORE_SYS_INTR4, intr4); if (intr4 & 8) hdmi4_cec_irq(&hdmi->core); } return IRQ_HANDLED; } static int hdmi_power_on_core(struct omap_hdmi *hdmi) { int r; if (hdmi->core.core_pwr_cnt++) return 0; r = regulator_enable(hdmi->vdda_reg); if (r) goto err_reg_enable; r = hdmi_runtime_get(hdmi); if (r) goto err_runtime_get; hdmi4_core_powerdown_disable(&hdmi->core); /* Make selection of HDMI in DSS */ dss_select_hdmi_venc_clk_source(hdmi->dss, DSS_HDMI_M_PCLK); hdmi->core_enabled = true; return 0; err_runtime_get: regulator_disable(hdmi->vdda_reg); err_reg_enable: hdmi->core.core_pwr_cnt--; return r; } static void hdmi_power_off_core(struct omap_hdmi *hdmi) { if (--hdmi->core.core_pwr_cnt) return; hdmi->core_enabled = false; hdmi_runtime_put(hdmi); regulator_disable(hdmi->vdda_reg); } static int hdmi_power_on_full(struct omap_hdmi *hdmi) { int r; const struct videomode *vm; struct hdmi_wp_data *wp = &hdmi->wp; struct dss_pll_clock_info hdmi_cinfo = { 0 }; unsigned int pc; r = hdmi_power_on_core(hdmi); if (r) return r; /* disable and clear irqs */ hdmi_wp_clear_irqenable(wp, ~HDMI_IRQ_CORE); hdmi_wp_set_irqstatus(wp, ~HDMI_IRQ_CORE); vm = &hdmi->cfg.vm; DSSDBG("hdmi_power_on hactive= %d vactive = %d\n", vm->hactive, vm->vactive); pc = vm->pixelclock; if (vm->flags & DISPLAY_FLAGS_DOUBLECLK) pc *= 2; /* DSS_HDMI_TCLK is bitclk / 10 */ pc *= 10; dss_pll_calc_b(&hdmi->pll.pll, clk_get_rate(hdmi->pll.pll.clkin), pc, &hdmi_cinfo); r = dss_pll_enable(&hdmi->pll.pll); if (r) { DSSERR("Failed to enable PLL\n"); goto err_pll_enable; } r = dss_pll_set_config(&hdmi->pll.pll, &hdmi_cinfo); if (r) { DSSERR("Failed to configure PLL\n"); goto err_pll_cfg; } r = hdmi_phy_configure(&hdmi->phy, hdmi_cinfo.clkdco, hdmi_cinfo.clkout[0]); if (r) { DSSDBG("Failed to configure PHY\n"); goto err_phy_cfg; } r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); if (r) goto err_phy_pwr; hdmi4_configure(&hdmi->core, &hdmi->wp, &hdmi->cfg); r = dss_mgr_enable(&hdmi->output); if (r) goto err_mgr_enable; r = hdmi_wp_video_start(&hdmi->wp); if (r) goto err_vid_enable; hdmi_wp_set_irqenable(wp, HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT); return 0; err_vid_enable: dss_mgr_disable(&hdmi->output); err_mgr_enable: hdmi_wp_set_phy_pwr(&hdmi->wp, HDMI_PHYPWRCMD_OFF); err_phy_pwr: err_phy_cfg: err_pll_cfg: dss_pll_disable(&hdmi->pll.pll); err_pll_enable: hdmi_power_off_core(hdmi); return -EIO; } static void hdmi_power_off_full(struct omap_hdmi *hdmi) { hdmi_wp_clear_irqenable(&hdmi->wp, ~HDMI_IRQ_CORE); hdmi_wp_video_stop(&hdmi->wp); dss_mgr_disable(&hdmi->output); hdmi_wp_set_phy_pwr(&hdmi->wp, HDMI_PHYPWRCMD_OFF); dss_pll_disable(&hdmi->pll.pll); hdmi_power_off_core(hdmi); } static int hdmi_dump_regs(struct seq_file *s, void *p) { struct omap_hdmi *hdmi = s->private; mutex_lock(&hdmi->lock); if (hdmi_runtime_get(hdmi)) { mutex_unlock(&hdmi->lock); return 0; } hdmi_wp_dump(&hdmi->wp, s); hdmi_pll_dump(&hdmi->pll, s); hdmi_phy_dump(&hdmi->phy, s); hdmi4_core_dump(&hdmi->core, s); hdmi_runtime_put(hdmi); mutex_unlock(&hdmi->lock); return 0; } static void hdmi_start_audio_stream(struct omap_hdmi *hd) { hdmi_wp_audio_enable(&hd->wp, true); hdmi4_audio_start(&hd->core, &hd->wp); } static void hdmi_stop_audio_stream(struct omap_hdmi *hd) { hdmi4_audio_stop(&hd->core, &hd->wp); hdmi_wp_audio_enable(&hd->wp, false); } int hdmi4_core_enable(struct hdmi_core_data *core) { struct omap_hdmi *hdmi = container_of(core, struct omap_hdmi, core); int r = 0; DSSDBG("ENTER omapdss_hdmi4_core_enable\n"); mutex_lock(&hdmi->lock); r = hdmi_power_on_core(hdmi); if (r) { DSSERR("failed to power on device\n"); goto err0; } mutex_unlock(&hdmi->lock); return 0; err0: mutex_unlock(&hdmi->lock); return r; } void hdmi4_core_disable(struct hdmi_core_data *core) { struct omap_hdmi *hdmi = container_of(core, struct omap_hdmi, core); DSSDBG("Enter omapdss_hdmi4_core_disable\n"); mutex_lock(&hdmi->lock); hdmi_power_off_core(hdmi); mutex_unlock(&hdmi->lock); } /* ----------------------------------------------------------------------------- * DRM Bridge Operations */ static int hdmi4_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) return -EINVAL; return drm_bridge_attach(bridge->encoder, hdmi->output.next_bridge, bridge, flags); } static void hdmi4_bridge_mode_set(struct drm_bridge *bridge, const struct drm_display_mode *mode, const struct drm_display_mode *adjusted_mode) { struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); mutex_lock(&hdmi->lock); drm_display_mode_to_videomode(adjusted_mode, &hdmi->cfg.vm); dispc_set_tv_pclk(hdmi->dss->dispc, adjusted_mode->clock * 1000); mutex_unlock(&hdmi->lock); } static void hdmi4_bridge_enable(struct drm_bridge *bridge, struct drm_bridge_state *bridge_state) { struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); struct drm_atomic_state *state = bridge_state->base.state; struct drm_connector_state *conn_state; struct drm_connector *connector; struct drm_crtc_state *crtc_state; unsigned long flags; int ret; /* * None of these should fail, as the bridge can't be enabled without a * valid CRTC to connector path with fully populated new states. */ connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); if (WARN_ON(!connector)) return; conn_state = drm_atomic_get_new_connector_state(state, connector); if (WARN_ON(!conn_state)) return; crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); if (WARN_ON(!crtc_state)) return; hdmi->cfg.hdmi_dvi_mode = connector->display_info.is_hdmi ? HDMI_HDMI : HDMI_DVI; if (connector->display_info.is_hdmi) { const struct drm_display_mode *mode; struct hdmi_avi_infoframe avi; mode = &crtc_state->adjusted_mode; ret = drm_hdmi_avi_infoframe_from_display_mode(&avi, connector, mode); if (ret == 0) hdmi->cfg.infoframe = avi; } mutex_lock(&hdmi->lock); ret = hdmi_power_on_full(hdmi); if (ret) { DSSERR("failed to power on device\n"); goto done; } if (hdmi->audio_configured) { ret = hdmi4_audio_config(&hdmi->core, &hdmi->wp, &hdmi->audio_config, hdmi->cfg.vm.pixelclock); if (ret) { DSSERR("Error restoring audio configuration: %d", ret); hdmi->audio_abort_cb(&hdmi->pdev->dev); hdmi->audio_configured = false; } } spin_lock_irqsave(&hdmi->audio_playing_lock, flags); if (hdmi->audio_configured && hdmi->audio_playing) hdmi_start_audio_stream(hdmi); hdmi->display_enabled = true; spin_unlock_irqrestore(&hdmi->audio_playing_lock, flags); done: mutex_unlock(&hdmi->lock); } static void hdmi4_bridge_disable(struct drm_bridge *bridge, struct drm_bridge_state *bridge_state) { struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); unsigned long flags; mutex_lock(&hdmi->lock); spin_lock_irqsave(&hdmi->audio_playing_lock, flags); hdmi_stop_audio_stream(hdmi); hdmi->display_enabled = false; spin_unlock_irqrestore(&hdmi->audio_playing_lock, flags); hdmi_power_off_full(hdmi); mutex_unlock(&hdmi->lock); } static void hdmi4_bridge_hpd_notify(struct drm_bridge *bridge, enum drm_connector_status status) { struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); if (status == connector_status_disconnected) hdmi4_cec_set_phys_addr(&hdmi->core, CEC_PHYS_ADDR_INVALID); } static struct edid *hdmi4_bridge_get_edid(struct drm_bridge *bridge, struct drm_connector *connector) { struct omap_hdmi *hdmi = drm_bridge_to_hdmi(bridge); struct edid *edid = NULL; unsigned int cec_addr; bool need_enable; int r; need_enable = hdmi->core_enabled == false; if (need_enable) { r = hdmi4_core_enable(&hdmi->core); if (r) return NULL; } mutex_lock(&hdmi->lock); r = hdmi_runtime_get(hdmi); BUG_ON(r); r = hdmi4_core_ddc_init(&hdmi->core); if (r) goto done; edid = drm_do_get_edid(connector, hdmi4_core_ddc_read, &hdmi->core); done: hdmi_runtime_put(hdmi); mutex_unlock(&hdmi->lock); if (edid && edid->extensions) { unsigned int len = (edid->extensions + 1) * EDID_LENGTH; cec_addr = cec_get_edid_phys_addr((u8 *)edid, len, NULL); } else { cec_addr = CEC_PHYS_ADDR_INVALID; } hdmi4_cec_set_phys_addr(&hdmi->core, cec_addr); if (need_enable) hdmi4_core_disable(&hdmi->core); return edid; } static const struct drm_bridge_funcs hdmi4_bridge_funcs = { .attach = hdmi4_bridge_attach, .mode_set = hdmi4_bridge_mode_set, .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, .atomic_reset = drm_atomic_helper_bridge_reset, .atomic_enable = hdmi4_bridge_enable, .atomic_disable = hdmi4_bridge_disable, .hpd_notify = hdmi4_bridge_hpd_notify, .get_edid = hdmi4_bridge_get_edid, }; static void hdmi4_bridge_init(struct omap_hdmi *hdmi) { hdmi->bridge.funcs = &hdmi4_bridge_funcs; hdmi->bridge.of_node = hdmi->pdev->dev.of_node; hdmi->bridge.ops = DRM_BRIDGE_OP_EDID; hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA; drm_bridge_add(&hdmi->bridge); } static void hdmi4_bridge_cleanup(struct omap_hdmi *hdmi) { drm_bridge_remove(&hdmi->bridge); } /* ----------------------------------------------------------------------------- * Audio Callbacks */ static int hdmi_audio_startup(struct device *dev, void (*abort_cb)(struct device *dev)) { struct omap_hdmi *hd = dev_get_drvdata(dev); mutex_lock(&hd->lock); WARN_ON(hd->audio_abort_cb != NULL); hd->audio_abort_cb = abort_cb; mutex_unlock(&hd->lock); return 0; } static int hdmi_audio_shutdown(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); mutex_lock(&hd->lock); hd->audio_abort_cb = NULL; hd->audio_configured = false; hd->audio_playing = false; mutex_unlock(&hd->lock); return 0; } static int hdmi_audio_start(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); unsigned long flags; spin_lock_irqsave(&hd->audio_playing_lock, flags); if (hd->display_enabled) { if (!hdmi_mode_has_audio(&hd->cfg)) DSSERR("%s: Video mode does not support audio\n", __func__); hdmi_start_audio_stream(hd); } hd->audio_playing = true; spin_unlock_irqrestore(&hd->audio_playing_lock, flags); return 0; } static void hdmi_audio_stop(struct device *dev) { struct omap_hdmi *hd = dev_get_drvdata(dev); unsigned long flags; WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); spin_lock_irqsave(&hd->audio_playing_lock, flags); if (hd->display_enabled) hdmi_stop_audio_stream(hd); hd->audio_playing = false; spin_unlock_irqrestore(&hd->audio_playing_lock, flags); } static int hdmi_audio_config(struct device *dev, struct omap_dss_audio *dss_audio) { struct omap_hdmi *hd = dev_get_drvdata(dev); int ret = 0; mutex_lock(&hd->lock); if (hd->display_enabled) { ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio, hd->cfg.vm.pixelclock); if (ret) goto out; } hd->audio_configured = true; hd->audio_config = *dss_audio; out: mutex_unlock(&hd->lock); return ret; } static const struct omap_hdmi_audio_ops hdmi_audio_ops = { .audio_startup = hdmi_audio_startup, .audio_shutdown = hdmi_audio_shutdown, .audio_start = hdmi_audio_start, .audio_stop = hdmi_audio_stop, .audio_config = hdmi_audio_config, }; static int hdmi_audio_register(struct omap_hdmi *hdmi) { struct omap_hdmi_audio_pdata pdata = { .dev = &hdmi->pdev->dev, .version = 4, .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi->wp), .ops = &hdmi_audio_ops, }; hdmi->audio_pdev = platform_device_register_data( &hdmi->pdev->dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO, &pdata, sizeof(pdata)); if (IS_ERR(hdmi->audio_pdev)) return PTR_ERR(hdmi->audio_pdev); return 0; } /* ----------------------------------------------------------------------------- * Component Bind & Unbind */ static int hdmi4_bind(struct device *dev, struct device *master, void *data) { struct dss_device *dss = dss_get_device(master); struct omap_hdmi *hdmi = dev_get_drvdata(dev); int r; hdmi->dss = dss; r = hdmi_runtime_get(hdmi); if (r) return r; r = hdmi_pll_init(dss, hdmi->pdev, &hdmi->pll, &hdmi->wp); if (r) goto err_runtime_put; r = hdmi4_cec_init(hdmi->pdev, &hdmi->core, &hdmi->wp); if (r) goto err_pll_uninit; r = hdmi_audio_register(hdmi); if (r) { DSSERR("Registering HDMI audio failed\n"); goto err_cec_uninit; } hdmi->debugfs = dss_debugfs_create_file(dss, "hdmi", hdmi_dump_regs, hdmi); hdmi_runtime_put(hdmi); return 0; err_cec_uninit: hdmi4_cec_uninit(&hdmi->core); err_pll_uninit: hdmi_pll_uninit(&hdmi->pll); err_runtime_put: hdmi_runtime_put(hdmi); return r; } static void hdmi4_unbind(struct device *dev, struct device *master, void *data) { struct omap_hdmi *hdmi = dev_get_drvdata(dev); dss_debugfs_remove_file(hdmi->debugfs); if (hdmi->audio_pdev) platform_device_unregister(hdmi->audio_pdev); hdmi4_cec_uninit(&hdmi->core); hdmi_pll_uninit(&hdmi->pll); } static const struct component_ops hdmi4_component_ops = { .bind = hdmi4_bind, .unbind = hdmi4_unbind, }; /* ----------------------------------------------------------------------------- * Probe & Remove, Suspend & Resume */ static int hdmi4_init_output(struct omap_hdmi *hdmi) { struct omap_dss_device *out = &hdmi->output; int r; hdmi4_bridge_init(hdmi); out->dev = &hdmi->pdev->dev; out->id = OMAP_DSS_OUTPUT_HDMI; out->type = OMAP_DISPLAY_TYPE_HDMI; out->name = "hdmi.0"; out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT; out->of_port = 0; r = omapdss_device_init_output(out, &hdmi->bridge); if (r < 0) { hdmi4_bridge_cleanup(hdmi); return r; } omapdss_device_register(out); return 0; } static void hdmi4_uninit_output(struct omap_hdmi *hdmi) { struct omap_dss_device *out = &hdmi->output; omapdss_device_unregister(out); omapdss_device_cleanup_output(out); hdmi4_bridge_cleanup(hdmi); } static int hdmi4_probe_of(struct omap_hdmi *hdmi) { struct platform_device *pdev = hdmi->pdev; struct device_node *node = pdev->dev.of_node; struct device_node *ep; int r; ep = of_graph_get_endpoint_by_regs(node, 0, 0); if (!ep) return 0; r = hdmi_parse_lanes_of(pdev, ep, &hdmi->phy); of_node_put(ep); return r; } static int hdmi4_probe(struct platform_device *pdev) { struct omap_hdmi *hdmi; int irq; int r; hdmi = kzalloc(sizeof(*hdmi), GFP_KERNEL); if (!hdmi) return -ENOMEM; hdmi->pdev = pdev; dev_set_drvdata(&pdev->dev, hdmi); mutex_init(&hdmi->lock); spin_lock_init(&hdmi->audio_playing_lock); r = hdmi4_probe_of(hdmi); if (r) goto err_free; r = hdmi_wp_init(pdev, &hdmi->wp, 4); if (r) goto err_free; r = hdmi_phy_init(pdev, &hdmi->phy, 4); if (r) goto err_free; r = hdmi4_core_init(pdev, &hdmi->core); if (r) goto err_free; irq = platform_get_irq(pdev, 0); if (irq < 0) { DSSERR("platform_get_irq failed\n"); r = -ENODEV; goto err_free; } r = devm_request_threaded_irq(&pdev->dev, irq, NULL, hdmi_irq_handler, IRQF_ONESHOT, "OMAP HDMI", hdmi); if (r) { DSSERR("HDMI IRQ request failed\n"); goto err_free; } hdmi->vdda_reg = devm_regulator_get(&pdev->dev, "vdda"); if (IS_ERR(hdmi->vdda_reg)) { r = PTR_ERR(hdmi->vdda_reg); if (r != -EPROBE_DEFER) DSSERR("can't get VDDA regulator\n"); goto err_free; } pm_runtime_enable(&pdev->dev); r = hdmi4_init_output(hdmi); if (r) goto err_pm_disable; r = component_add(&pdev->dev, &hdmi4_component_ops); if (r) goto err_uninit_output; return 0; err_uninit_output: hdmi4_uninit_output(hdmi); err_pm_disable: pm_runtime_disable(&pdev->dev); err_free: kfree(hdmi); return r; } static int hdmi4_remove(struct platform_device *pdev) { struct omap_hdmi *hdmi = platform_get_drvdata(pdev); component_del(&pdev->dev, &hdmi4_component_ops); hdmi4_uninit_output(hdmi); pm_runtime_disable(&pdev->dev); kfree(hdmi); return 0; } static const struct of_device_id hdmi_of_match[] = { { .compatible = "ti,omap4-hdmi", }, {}, }; struct platform_driver omapdss_hdmi4hw_driver = { .probe = hdmi4_probe, .remove = hdmi4_remove, .driver = { .name = "omapdss_hdmi", .of_match_table = hdmi_of_match, .suppress_bind_attrs = true, }, };