/* * Copyright (C) STMicroelectronics SA 2014 * Author: Vincent Abriou <vincent.abriou@st.com> for STMicroelectronics. * License terms: GNU General Public License (GPL), version 2 */ #include <linux/clk.h> #include <linux/component.h> #include <linux/hdmi.h> #include <linux/module.h> #include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/reset.h> #include <drm/drmP.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_edid.h> #include "sti_hdmi.h" #include "sti_hdmi_tx3g4c28phy.h" #include "sti_hdmi_tx3g0c55phy.h" #include "sti_vtg.h" #define HDMI_CFG 0x0000 #define HDMI_INT_EN 0x0004 #define HDMI_INT_STA 0x0008 #define HDMI_INT_CLR 0x000C #define HDMI_STA 0x0010 #define HDMI_ACTIVE_VID_XMIN 0x0100 #define HDMI_ACTIVE_VID_XMAX 0x0104 #define HDMI_ACTIVE_VID_YMIN 0x0108 #define HDMI_ACTIVE_VID_YMAX 0x010C #define HDMI_DFLT_CHL0_DAT 0x0110 #define HDMI_DFLT_CHL1_DAT 0x0114 #define HDMI_DFLT_CHL2_DAT 0x0118 #define HDMI_SW_DI_1_HEAD_WORD 0x0210 #define HDMI_SW_DI_1_PKT_WORD0 0x0214 #define HDMI_SW_DI_1_PKT_WORD1 0x0218 #define HDMI_SW_DI_1_PKT_WORD2 0x021C #define HDMI_SW_DI_1_PKT_WORD3 0x0220 #define HDMI_SW_DI_1_PKT_WORD4 0x0224 #define HDMI_SW_DI_1_PKT_WORD5 0x0228 #define HDMI_SW_DI_1_PKT_WORD6 0x022C #define HDMI_SW_DI_CFG 0x0230 #define HDMI_IFRAME_SLOT_AVI 1 #define XCAT(prefix, x, suffix) prefix ## x ## suffix #define HDMI_SW_DI_N_HEAD_WORD(x) XCAT(HDMI_SW_DI_, x, _HEAD_WORD) #define HDMI_SW_DI_N_PKT_WORD0(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD0) #define HDMI_SW_DI_N_PKT_WORD1(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD1) #define HDMI_SW_DI_N_PKT_WORD2(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD2) #define HDMI_SW_DI_N_PKT_WORD3(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD3) #define HDMI_SW_DI_N_PKT_WORD4(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD4) #define HDMI_SW_DI_N_PKT_WORD5(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD5) #define HDMI_SW_DI_N_PKT_WORD6(x) XCAT(HDMI_SW_DI_, x, _PKT_WORD6) #define HDMI_IFRAME_DISABLED 0x0 #define HDMI_IFRAME_SINGLE_SHOT 0x1 #define HDMI_IFRAME_FIELD 0x2 #define HDMI_IFRAME_FRAME 0x3 #define HDMI_IFRAME_MASK 0x3 #define HDMI_IFRAME_CFG_DI_N(x, n) ((x) << ((n-1)*4)) /* n from 1 to 6 */ #define HDMI_CFG_DEVICE_EN BIT(0) #define HDMI_CFG_HDMI_NOT_DVI BIT(1) #define HDMI_CFG_HDCP_EN BIT(2) #define HDMI_CFG_ESS_NOT_OESS BIT(3) #define HDMI_CFG_H_SYNC_POL_NEG BIT(4) #define HDMI_CFG_SINK_TERM_DET_EN BIT(5) #define HDMI_CFG_V_SYNC_POL_NEG BIT(6) #define HDMI_CFG_422_EN BIT(8) #define HDMI_CFG_FIFO_OVERRUN_CLR BIT(12) #define HDMI_CFG_FIFO_UNDERRUN_CLR BIT(13) #define HDMI_CFG_SW_RST_EN BIT(31) #define HDMI_INT_GLOBAL BIT(0) #define HDMI_INT_SW_RST BIT(1) #define HDMI_INT_PIX_CAP BIT(3) #define HDMI_INT_HOT_PLUG BIT(4) #define HDMI_INT_DLL_LCK BIT(5) #define HDMI_INT_NEW_FRAME BIT(6) #define HDMI_INT_GENCTRL_PKT BIT(7) #define HDMI_INT_SINK_TERM_PRESENT BIT(11) #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \ | HDMI_INT_DLL_LCK \ | HDMI_INT_HOT_PLUG \ | HDMI_INT_GLOBAL) #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \ | HDMI_INT_GENCTRL_PKT \ | HDMI_INT_NEW_FRAME \ | HDMI_INT_DLL_LCK \ | HDMI_INT_HOT_PLUG \ | HDMI_INT_PIX_CAP \ | HDMI_INT_SW_RST \ | HDMI_INT_GLOBAL) #define HDMI_STA_SW_RST BIT(1) struct sti_hdmi_connector { struct drm_connector drm_connector; struct drm_encoder *encoder; struct sti_hdmi *hdmi; }; #define to_sti_hdmi_connector(x) \ container_of(x, struct sti_hdmi_connector, drm_connector) u32 hdmi_read(struct sti_hdmi *hdmi, int offset) { return readl(hdmi->regs + offset); } void hdmi_write(struct sti_hdmi *hdmi, u32 val, int offset) { writel(val, hdmi->regs + offset); } /** * HDMI interrupt handler threaded * * @irq: irq number * @arg: connector structure */ static irqreturn_t hdmi_irq_thread(int irq, void *arg) { struct sti_hdmi *hdmi = arg; /* Hot plug/unplug IRQ */ if (hdmi->irq_status & HDMI_INT_HOT_PLUG) { /* read gpio to get the status */ hdmi->hpd = gpio_get_value(hdmi->hpd_gpio); if (hdmi->drm_dev) drm_helper_hpd_irq_event(hdmi->drm_dev); } /* Sw reset and PLL lock are exclusive so we can use the same * event to signal them */ if (hdmi->irq_status & (HDMI_INT_SW_RST | HDMI_INT_DLL_LCK)) { hdmi->event_received = true; wake_up_interruptible(&hdmi->wait_event); } return IRQ_HANDLED; } /** * HDMI interrupt handler * * @irq: irq number * @arg: connector structure */ static irqreturn_t hdmi_irq(int irq, void *arg) { struct sti_hdmi *hdmi = arg; /* read interrupt status */ hdmi->irq_status = hdmi_read(hdmi, HDMI_INT_STA); /* clear interrupt status */ hdmi_write(hdmi, hdmi->irq_status, HDMI_INT_CLR); /* force sync bus write */ hdmi_read(hdmi, HDMI_INT_STA); return IRQ_WAKE_THREAD; } /** * Set hdmi active area depending on the drm display mode selected * * @hdmi: pointer on the hdmi internal structure */ static void hdmi_active_area(struct sti_hdmi *hdmi) { u32 xmin, xmax; u32 ymin, ymax; xmin = sti_vtg_get_pixel_number(hdmi->mode, 0); xmax = sti_vtg_get_pixel_number(hdmi->mode, hdmi->mode.hdisplay - 1); ymin = sti_vtg_get_line_number(hdmi->mode, 0); ymax = sti_vtg_get_line_number(hdmi->mode, hdmi->mode.vdisplay - 1); hdmi_write(hdmi, xmin, HDMI_ACTIVE_VID_XMIN); hdmi_write(hdmi, xmax, HDMI_ACTIVE_VID_XMAX); hdmi_write(hdmi, ymin, HDMI_ACTIVE_VID_YMIN); hdmi_write(hdmi, ymax, HDMI_ACTIVE_VID_YMAX); } /** * Overall hdmi configuration * * @hdmi: pointer on the hdmi internal structure */ static void hdmi_config(struct sti_hdmi *hdmi) { u32 conf; DRM_DEBUG_DRIVER("\n"); /* Clear overrun and underrun fifo */ conf = HDMI_CFG_FIFO_OVERRUN_CLR | HDMI_CFG_FIFO_UNDERRUN_CLR; /* Enable HDMI mode not DVI */ conf |= HDMI_CFG_HDMI_NOT_DVI | HDMI_CFG_ESS_NOT_OESS; /* Enable sink term detection */ conf |= HDMI_CFG_SINK_TERM_DET_EN; /* Set Hsync polarity */ if (hdmi->mode.flags & DRM_MODE_FLAG_NHSYNC) { DRM_DEBUG_DRIVER("H Sync Negative\n"); conf |= HDMI_CFG_H_SYNC_POL_NEG; } /* Set Vsync polarity */ if (hdmi->mode.flags & DRM_MODE_FLAG_NVSYNC) { DRM_DEBUG_DRIVER("V Sync Negative\n"); conf |= HDMI_CFG_V_SYNC_POL_NEG; } /* Enable HDMI */ conf |= HDMI_CFG_DEVICE_EN; hdmi_write(hdmi, conf, HDMI_CFG); } /** * Prepare and configure the AVI infoframe * * AVI infoframe are transmitted at least once per two video field and * contains information about HDMI transmission mode such as color space, * colorimetry, ... * * @hdmi: pointer on the hdmi internal structure * * Return negative value if error occurs */ static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi) { struct drm_display_mode *mode = &hdmi->mode; struct hdmi_avi_infoframe infoframe; u8 buffer[HDMI_INFOFRAME_SIZE(AVI)]; u8 *frame = buffer + HDMI_INFOFRAME_HEADER_SIZE; u32 val; int ret; DRM_DEBUG_DRIVER("\n"); ret = drm_hdmi_avi_infoframe_from_display_mode(&infoframe, mode); if (ret < 0) { DRM_ERROR("failed to setup AVI infoframe: %d\n", ret); return ret; } /* fixed infoframe configuration not linked to the mode */ infoframe.colorspace = HDMI_COLORSPACE_RGB; infoframe.quantization_range = HDMI_QUANTIZATION_RANGE_DEFAULT; infoframe.colorimetry = HDMI_COLORIMETRY_NONE; ret = hdmi_avi_infoframe_pack(&infoframe, buffer, sizeof(buffer)); if (ret < 0) { DRM_ERROR("failed to pack AVI infoframe: %d\n", ret); return ret; } /* Disable transmission slot for AVI infoframe */ val = hdmi_read(hdmi, HDMI_SW_DI_CFG); val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK, HDMI_IFRAME_SLOT_AVI); hdmi_write(hdmi, val, HDMI_SW_DI_CFG); /* Infoframe header */ val = buffer[0x0]; val |= buffer[0x1] << 8; val |= buffer[0x2] << 16; hdmi_write(hdmi, val, HDMI_SW_DI_N_HEAD_WORD(HDMI_IFRAME_SLOT_AVI)); /* Infoframe packet bytes */ val = frame[0x0]; val |= frame[0x1] << 8; val |= frame[0x2] << 16; val |= frame[0x3] << 24; hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD0(HDMI_IFRAME_SLOT_AVI)); val = frame[0x4]; val |= frame[0x5] << 8; val |= frame[0x6] << 16; val |= frame[0x7] << 24; hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD1(HDMI_IFRAME_SLOT_AVI)); val = frame[0x8]; val |= frame[0x9] << 8; val |= frame[0xA] << 16; val |= frame[0xB] << 24; hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD2(HDMI_IFRAME_SLOT_AVI)); val = frame[0xC]; hdmi_write(hdmi, val, HDMI_SW_DI_N_PKT_WORD3(HDMI_IFRAME_SLOT_AVI)); /* Enable transmission slot for AVI infoframe * According to the hdmi specification, AVI infoframe should be * transmitted at least once per two video fields */ val = hdmi_read(hdmi, HDMI_SW_DI_CFG); val |= HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_FIELD, HDMI_IFRAME_SLOT_AVI); hdmi_write(hdmi, val, HDMI_SW_DI_CFG); return 0; } /** * Software reset of the hdmi subsystem * * @hdmi: pointer on the hdmi internal structure * */ #define HDMI_TIMEOUT_SWRESET 100 /*milliseconds */ static void hdmi_swreset(struct sti_hdmi *hdmi) { u32 val; DRM_DEBUG_DRIVER("\n"); /* Enable hdmi_audio clock only during hdmi reset */ if (clk_prepare_enable(hdmi->clk_audio)) DRM_INFO("Failed to prepare/enable hdmi_audio clk\n"); /* Sw reset */ hdmi->event_received = false; val = hdmi_read(hdmi, HDMI_CFG); val |= HDMI_CFG_SW_RST_EN; hdmi_write(hdmi, val, HDMI_CFG); /* Wait reset completed */ wait_event_interruptible_timeout(hdmi->wait_event, hdmi->event_received == true, msecs_to_jiffies (HDMI_TIMEOUT_SWRESET)); /* * HDMI_STA_SW_RST bit is set to '1' when SW_RST bit in HDMI_CFG is * set to '1' and clk_audio is running. */ if ((hdmi_read(hdmi, HDMI_STA) & HDMI_STA_SW_RST) == 0) DRM_DEBUG_DRIVER("Warning: HDMI sw reset timeout occurs\n"); val = hdmi_read(hdmi, HDMI_CFG); val &= ~HDMI_CFG_SW_RST_EN; hdmi_write(hdmi, val, HDMI_CFG); /* Disable hdmi_audio clock. Not used anymore for drm purpose */ clk_disable_unprepare(hdmi->clk_audio); } static void sti_hdmi_disable(struct drm_bridge *bridge) { struct sti_hdmi *hdmi = bridge->driver_private; u32 val = hdmi_read(hdmi, HDMI_CFG); if (!hdmi->enabled) return; DRM_DEBUG_DRIVER("\n"); /* Disable HDMI */ val &= ~HDMI_CFG_DEVICE_EN; hdmi_write(hdmi, val, HDMI_CFG); hdmi_write(hdmi, 0xffffffff, HDMI_INT_CLR); /* Stop the phy */ hdmi->phy_ops->stop(hdmi); /* Set the default channel data to be a dark red */ hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL0_DAT); hdmi_write(hdmi, 0x0000, HDMI_DFLT_CHL1_DAT); hdmi_write(hdmi, 0x0060, HDMI_DFLT_CHL2_DAT); /* Disable/unprepare hdmi clock */ clk_disable_unprepare(hdmi->clk_phy); clk_disable_unprepare(hdmi->clk_tmds); clk_disable_unprepare(hdmi->clk_pix); hdmi->enabled = false; } static void sti_hdmi_pre_enable(struct drm_bridge *bridge) { struct sti_hdmi *hdmi = bridge->driver_private; DRM_DEBUG_DRIVER("\n"); if (hdmi->enabled) return; /* Prepare/enable clocks */ if (clk_prepare_enable(hdmi->clk_pix)) DRM_ERROR("Failed to prepare/enable hdmi_pix clk\n"); if (clk_prepare_enable(hdmi->clk_tmds)) DRM_ERROR("Failed to prepare/enable hdmi_tmds clk\n"); if (clk_prepare_enable(hdmi->clk_phy)) DRM_ERROR("Failed to prepare/enable hdmi_rejec_pll clk\n"); hdmi->enabled = true; /* Program hdmi serializer and start phy */ if (!hdmi->phy_ops->start(hdmi)) { DRM_ERROR("Unable to start hdmi phy\n"); return; } /* Program hdmi active area */ hdmi_active_area(hdmi); /* Enable working interrupts */ hdmi_write(hdmi, HDMI_WORKING_INT, HDMI_INT_EN); /* Program hdmi config */ hdmi_config(hdmi); /* Program AVI infoframe */ if (hdmi_avi_infoframe_config(hdmi)) DRM_ERROR("Unable to configure AVI infoframe\n"); /* Sw reset */ hdmi_swreset(hdmi); } static void sti_hdmi_set_mode(struct drm_bridge *bridge, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct sti_hdmi *hdmi = bridge->driver_private; int ret; DRM_DEBUG_DRIVER("\n"); /* Copy the drm display mode in the connector local structure */ memcpy(&hdmi->mode, mode, sizeof(struct drm_display_mode)); /* Update clock framerate according to the selected mode */ ret = clk_set_rate(hdmi->clk_pix, mode->clock * 1000); if (ret < 0) { DRM_ERROR("Cannot set rate (%dHz) for hdmi_pix clk\n", mode->clock * 1000); return; } ret = clk_set_rate(hdmi->clk_phy, mode->clock * 1000); if (ret < 0) { DRM_ERROR("Cannot set rate (%dHz) for hdmi_rejection_pll clk\n", mode->clock * 1000); return; } } static void sti_hdmi_bridge_nope(struct drm_bridge *bridge) { /* do nothing */ } static void sti_hdmi_brigde_destroy(struct drm_bridge *bridge) { drm_bridge_cleanup(bridge); kfree(bridge); } static const struct drm_bridge_funcs sti_hdmi_bridge_funcs = { .pre_enable = sti_hdmi_pre_enable, .enable = sti_hdmi_bridge_nope, .disable = sti_hdmi_disable, .post_disable = sti_hdmi_bridge_nope, .mode_set = sti_hdmi_set_mode, .destroy = sti_hdmi_brigde_destroy, }; static int sti_hdmi_connector_get_modes(struct drm_connector *connector) { struct i2c_adapter *i2c_adap; struct edid *edid; int count; DRM_DEBUG_DRIVER("\n"); i2c_adap = i2c_get_adapter(1); if (!i2c_adap) goto fail; edid = drm_get_edid(connector, i2c_adap); if (!edid) goto fail; count = drm_add_edid_modes(connector, edid); drm_mode_connector_update_edid_property(connector, edid); kfree(edid); return count; fail: DRM_ERROR("Can not read HDMI EDID\n"); return 0; } #define CLK_TOLERANCE_HZ 50 static int sti_hdmi_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { int target = mode->clock * 1000; int target_min = target - CLK_TOLERANCE_HZ; int target_max = target + CLK_TOLERANCE_HZ; int result; struct sti_hdmi_connector *hdmi_connector = to_sti_hdmi_connector(connector); struct sti_hdmi *hdmi = hdmi_connector->hdmi; result = clk_round_rate(hdmi->clk_pix, target); DRM_DEBUG_DRIVER("target rate = %d => available rate = %d\n", target, result); if ((result < target_min) || (result > target_max)) { DRM_DEBUG_DRIVER("hdmi pixclk=%d not supported\n", target); return MODE_BAD; } return MODE_OK; } struct drm_encoder *sti_hdmi_best_encoder(struct drm_connector *connector) { struct sti_hdmi_connector *hdmi_connector = to_sti_hdmi_connector(connector); /* Best encoder is the one associated during connector creation */ return hdmi_connector->encoder; } static struct drm_connector_helper_funcs sti_hdmi_connector_helper_funcs = { .get_modes = sti_hdmi_connector_get_modes, .mode_valid = sti_hdmi_connector_mode_valid, .best_encoder = sti_hdmi_best_encoder, }; /* get detection status of display device */ static enum drm_connector_status sti_hdmi_connector_detect(struct drm_connector *connector, bool force) { struct sti_hdmi_connector *hdmi_connector = to_sti_hdmi_connector(connector); struct sti_hdmi *hdmi = hdmi_connector->hdmi; DRM_DEBUG_DRIVER("\n"); if (hdmi->hpd) { DRM_DEBUG_DRIVER("hdmi cable connected\n"); return connector_status_connected; } DRM_DEBUG_DRIVER("hdmi cable disconnected\n"); return connector_status_disconnected; } static void sti_hdmi_connector_destroy(struct drm_connector *connector) { struct sti_hdmi_connector *hdmi_connector = to_sti_hdmi_connector(connector); drm_connector_unregister(connector); drm_connector_cleanup(connector); kfree(hdmi_connector); } static struct drm_connector_funcs sti_hdmi_connector_funcs = { .dpms = drm_helper_connector_dpms, .fill_modes = drm_helper_probe_single_connector_modes, .detect = sti_hdmi_connector_detect, .destroy = sti_hdmi_connector_destroy, }; static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev) { struct drm_encoder *encoder; list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) { if (encoder->encoder_type == DRM_MODE_ENCODER_TMDS) return encoder; } return NULL; } static int sti_hdmi_bind(struct device *dev, struct device *master, void *data) { struct sti_hdmi *hdmi = dev_get_drvdata(dev); struct drm_device *drm_dev = data; struct drm_encoder *encoder; struct sti_hdmi_connector *connector; struct drm_connector *drm_connector; struct drm_bridge *bridge; struct i2c_adapter *i2c_adap; int err; i2c_adap = i2c_get_adapter(1); if (!i2c_adap) return -EPROBE_DEFER; /* Set the drm device handle */ hdmi->drm_dev = drm_dev; encoder = sti_hdmi_find_encoder(drm_dev); if (!encoder) return -ENOMEM; connector = devm_kzalloc(dev, sizeof(*connector), GFP_KERNEL); if (!connector) return -ENOMEM; connector->hdmi = hdmi; bridge = devm_kzalloc(dev, sizeof(*bridge), GFP_KERNEL); if (!bridge) return -ENOMEM; bridge->driver_private = hdmi; drm_bridge_init(drm_dev, bridge, &sti_hdmi_bridge_funcs); encoder->bridge = bridge; connector->encoder = encoder; drm_connector = (struct drm_connector *)connector; drm_connector->polled = DRM_CONNECTOR_POLL_HPD; drm_connector_init(drm_dev, drm_connector, &sti_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA); drm_connector_helper_add(drm_connector, &sti_hdmi_connector_helper_funcs); err = drm_connector_register(drm_connector); if (err) goto err_connector; err = drm_mode_connector_attach_encoder(drm_connector, encoder); if (err) { DRM_ERROR("Failed to attach a connector to a encoder\n"); goto err_sysfs; } /* Enable default interrupts */ hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN); return 0; err_sysfs: drm_connector_unregister(drm_connector); err_connector: drm_bridge_cleanup(bridge); drm_connector_cleanup(drm_connector); return -EINVAL; } static void sti_hdmi_unbind(struct device *dev, struct device *master, void *data) { /* do nothing */ } static const struct component_ops sti_hdmi_ops = { .bind = sti_hdmi_bind, .unbind = sti_hdmi_unbind, }; static const struct of_device_id hdmi_of_match[] = { { .compatible = "st,stih416-hdmi", .data = &tx3g0c55phy_ops, }, { .compatible = "st,stih407-hdmi", .data = &tx3g4c28phy_ops, }, { /* end node */ } }; MODULE_DEVICE_TABLE(of, hdmi_of_match); static int sti_hdmi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct sti_hdmi *hdmi; struct device_node *np = dev->of_node; struct resource *res; int ret; DRM_INFO("%s\n", __func__); hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); if (!hdmi) return -ENOMEM; hdmi->dev = pdev->dev; /* Get resources */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "hdmi-reg"); if (!res) { DRM_ERROR("Invalid hdmi resource\n"); return -ENOMEM; } hdmi->regs = devm_ioremap_nocache(dev, res->start, resource_size(res)); if (!hdmi->regs) return -ENOMEM; if (of_device_is_compatible(np, "st,stih416-hdmi")) { res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "syscfg"); if (!res) { DRM_ERROR("Invalid syscfg resource\n"); return -ENOMEM; } hdmi->syscfg = devm_ioremap_nocache(dev, res->start, resource_size(res)); if (!hdmi->syscfg) return -ENOMEM; } hdmi->phy_ops = (struct hdmi_phy_ops *) of_match_node(hdmi_of_match, np)->data; /* Get clock resources */ hdmi->clk_pix = devm_clk_get(dev, "pix"); if (IS_ERR(hdmi->clk_pix)) { DRM_ERROR("Cannot get hdmi_pix clock\n"); return PTR_ERR(hdmi->clk_pix); } hdmi->clk_tmds = devm_clk_get(dev, "tmds"); if (IS_ERR(hdmi->clk_tmds)) { DRM_ERROR("Cannot get hdmi_tmds clock\n"); return PTR_ERR(hdmi->clk_tmds); } hdmi->clk_phy = devm_clk_get(dev, "phy"); if (IS_ERR(hdmi->clk_phy)) { DRM_ERROR("Cannot get hdmi_phy clock\n"); return PTR_ERR(hdmi->clk_phy); } hdmi->clk_audio = devm_clk_get(dev, "audio"); if (IS_ERR(hdmi->clk_audio)) { DRM_ERROR("Cannot get hdmi_audio clock\n"); return PTR_ERR(hdmi->clk_audio); } hdmi->hpd_gpio = of_get_named_gpio(np, "hdmi,hpd-gpio", 0); if (hdmi->hpd_gpio < 0) { DRM_ERROR("Failed to get hdmi hpd-gpio\n"); return -EIO; } hdmi->hpd = gpio_get_value(hdmi->hpd_gpio); init_waitqueue_head(&hdmi->wait_event); hdmi->irq = platform_get_irq_byname(pdev, "irq"); ret = devm_request_threaded_irq(dev, hdmi->irq, hdmi_irq, hdmi_irq_thread, IRQF_ONESHOT, dev_name(dev), hdmi); if (ret) { DRM_ERROR("Failed to register HDMI interrupt\n"); return ret; } hdmi->reset = devm_reset_control_get(dev, "hdmi"); /* Take hdmi out of reset */ if (!IS_ERR(hdmi->reset)) reset_control_deassert(hdmi->reset); platform_set_drvdata(pdev, hdmi); return component_add(&pdev->dev, &sti_hdmi_ops); } static int sti_hdmi_remove(struct platform_device *pdev) { component_del(&pdev->dev, &sti_hdmi_ops); return 0; } struct platform_driver sti_hdmi_driver = { .driver = { .name = "sti-hdmi", .owner = THIS_MODULE, .of_match_table = hdmi_of_match, }, .probe = sti_hdmi_probe, .remove = sti_hdmi_remove, }; module_platform_driver(sti_hdmi_driver); MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>"); MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver"); MODULE_LICENSE("GPL");