/* * Copyright 2016 Linaro Ltd. * Copyright 2016 ZTE Corporation. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "zx_hdmi_regs.h" #include "zx_vou.h" #define ZX_HDMI_INFOFRAME_SIZE 31 #define DDC_SEGMENT_ADDR 0x30 struct zx_hdmi_i2c { struct i2c_adapter adap; struct mutex lock; }; struct zx_hdmi { struct drm_connector connector; struct drm_encoder encoder; struct zx_hdmi_i2c *ddc; struct device *dev; struct drm_device *drm; void __iomem *mmio; struct clk *cec_clk; struct clk *osc_clk; struct clk *xclk; bool sink_is_hdmi; bool sink_has_audio; struct platform_device *audio_pdev; }; #define to_zx_hdmi(x) container_of(x, struct zx_hdmi, x) static inline u8 hdmi_readb(struct zx_hdmi *hdmi, u16 offset) { return readl_relaxed(hdmi->mmio + offset * 4); } static inline void hdmi_writeb(struct zx_hdmi *hdmi, u16 offset, u8 val) { writel_relaxed(val, hdmi->mmio + offset * 4); } static inline void hdmi_writeb_mask(struct zx_hdmi *hdmi, u16 offset, u8 mask, u8 val) { u8 tmp; tmp = hdmi_readb(hdmi, offset); tmp = (tmp & ~mask) | (val & mask); hdmi_writeb(hdmi, offset, tmp); } static int zx_hdmi_infoframe_trans(struct zx_hdmi *hdmi, union hdmi_infoframe *frame, u8 fsel) { u8 buffer[ZX_HDMI_INFOFRAME_SIZE]; int num; int i; hdmi_writeb(hdmi, TPI_INFO_FSEL, fsel); num = hdmi_infoframe_pack(frame, buffer, ZX_HDMI_INFOFRAME_SIZE); if (num < 0) { DRM_DEV_ERROR(hdmi->dev, "failed to pack infoframe: %d\n", num); return num; } for (i = 0; i < num; i++) hdmi_writeb(hdmi, TPI_INFO_B0 + i, buffer[i]); hdmi_writeb_mask(hdmi, TPI_INFO_EN, TPI_INFO_TRANS_RPT, TPI_INFO_TRANS_RPT); hdmi_writeb_mask(hdmi, TPI_INFO_EN, TPI_INFO_TRANS_EN, TPI_INFO_TRANS_EN); return num; } static int zx_hdmi_config_video_vsi(struct zx_hdmi *hdmi, struct drm_display_mode *mode) { union hdmi_infoframe frame; int ret; ret = drm_hdmi_vendor_infoframe_from_display_mode(&frame.vendor.hdmi, mode); if (ret) { DRM_DEV_ERROR(hdmi->dev, "failed to get vendor infoframe: %d\n", ret); return ret; } return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_VSIF); } static int zx_hdmi_config_video_avi(struct zx_hdmi *hdmi, struct drm_display_mode *mode) { union hdmi_infoframe frame; int ret; ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode); if (ret) { DRM_DEV_ERROR(hdmi->dev, "failed to get avi infoframe: %d\n", ret); return ret; } /* We always use YUV444 for HDMI output. */ frame.avi.colorspace = HDMI_COLORSPACE_YUV444; return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_AVI); } static void zx_hdmi_encoder_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adj_mode) { struct zx_hdmi *hdmi = to_zx_hdmi(encoder); if (hdmi->sink_is_hdmi) { zx_hdmi_config_video_avi(hdmi, mode); zx_hdmi_config_video_vsi(hdmi, mode); } } static void zx_hdmi_phy_start(struct zx_hdmi *hdmi) { /* Copy from ZTE BSP code */ hdmi_writeb(hdmi, 0x222, 0x0); hdmi_writeb(hdmi, 0x224, 0x4); hdmi_writeb(hdmi, 0x909, 0x0); hdmi_writeb(hdmi, 0x7b0, 0x90); hdmi_writeb(hdmi, 0x7b1, 0x00); hdmi_writeb(hdmi, 0x7b2, 0xa7); hdmi_writeb(hdmi, 0x7b8, 0xaa); hdmi_writeb(hdmi, 0x7b2, 0xa7); hdmi_writeb(hdmi, 0x7b3, 0x0f); hdmi_writeb(hdmi, 0x7b4, 0x0f); hdmi_writeb(hdmi, 0x7b5, 0x55); hdmi_writeb(hdmi, 0x7b7, 0x03); hdmi_writeb(hdmi, 0x7b9, 0x12); hdmi_writeb(hdmi, 0x7ba, 0x32); hdmi_writeb(hdmi, 0x7bc, 0x68); hdmi_writeb(hdmi, 0x7be, 0x40); hdmi_writeb(hdmi, 0x7bf, 0x84); hdmi_writeb(hdmi, 0x7c1, 0x0f); hdmi_writeb(hdmi, 0x7c8, 0x02); hdmi_writeb(hdmi, 0x7c9, 0x03); hdmi_writeb(hdmi, 0x7ca, 0x40); hdmi_writeb(hdmi, 0x7dc, 0x31); hdmi_writeb(hdmi, 0x7e2, 0x04); hdmi_writeb(hdmi, 0x7e0, 0x06); hdmi_writeb(hdmi, 0x7cb, 0x68); hdmi_writeb(hdmi, 0x7f9, 0x02); hdmi_writeb(hdmi, 0x7b6, 0x02); hdmi_writeb(hdmi, 0x7f3, 0x0); } static void zx_hdmi_hw_enable(struct zx_hdmi *hdmi) { /* Enable pclk */ hdmi_writeb_mask(hdmi, CLKPWD, CLKPWD_PDIDCK, CLKPWD_PDIDCK); /* Enable HDMI for TX */ hdmi_writeb_mask(hdmi, FUNC_SEL, FUNC_HDMI_EN, FUNC_HDMI_EN); /* Enable deep color packet */ hdmi_writeb_mask(hdmi, P2T_CTRL, P2T_DC_PKT_EN, P2T_DC_PKT_EN); /* Enable HDMI/MHL mode for output */ hdmi_writeb_mask(hdmi, TEST_TXCTRL, TEST_TXCTRL_HDMI_MODE, TEST_TXCTRL_HDMI_MODE); /* Configure reg_qc_sel */ hdmi_writeb(hdmi, HDMICTL4, 0x3); /* Enable interrupt */ hdmi_writeb_mask(hdmi, INTR1_MASK, INTR1_MONITOR_DETECT, INTR1_MONITOR_DETECT); /* Start up phy */ zx_hdmi_phy_start(hdmi); } static void zx_hdmi_hw_disable(struct zx_hdmi *hdmi) { /* Disable interrupt */ hdmi_writeb_mask(hdmi, INTR1_MASK, INTR1_MONITOR_DETECT, 0); /* Disable deep color packet */ hdmi_writeb_mask(hdmi, P2T_CTRL, P2T_DC_PKT_EN, P2T_DC_PKT_EN); /* Disable HDMI for TX */ hdmi_writeb_mask(hdmi, FUNC_SEL, FUNC_HDMI_EN, 0); /* Disable pclk */ hdmi_writeb_mask(hdmi, CLKPWD, CLKPWD_PDIDCK, 0); } static void zx_hdmi_encoder_enable(struct drm_encoder *encoder) { struct zx_hdmi *hdmi = to_zx_hdmi(encoder); clk_prepare_enable(hdmi->cec_clk); clk_prepare_enable(hdmi->osc_clk); clk_prepare_enable(hdmi->xclk); zx_hdmi_hw_enable(hdmi); vou_inf_enable(VOU_HDMI, encoder->crtc); } static void zx_hdmi_encoder_disable(struct drm_encoder *encoder) { struct zx_hdmi *hdmi = to_zx_hdmi(encoder); vou_inf_disable(VOU_HDMI, encoder->crtc); zx_hdmi_hw_disable(hdmi); clk_disable_unprepare(hdmi->xclk); clk_disable_unprepare(hdmi->osc_clk); clk_disable_unprepare(hdmi->cec_clk); } static const struct drm_encoder_helper_funcs zx_hdmi_encoder_helper_funcs = { .enable = zx_hdmi_encoder_enable, .disable = zx_hdmi_encoder_disable, .mode_set = zx_hdmi_encoder_mode_set, }; static const struct drm_encoder_funcs zx_hdmi_encoder_funcs = { .destroy = drm_encoder_cleanup, }; static int zx_hdmi_connector_get_modes(struct drm_connector *connector) { struct zx_hdmi *hdmi = to_zx_hdmi(connector); struct edid *edid; int ret; edid = drm_get_edid(connector, &hdmi->ddc->adap); if (!edid) return 0; hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid); hdmi->sink_has_audio = drm_detect_monitor_audio(edid); drm_mode_connector_update_edid_property(connector, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); return ret; } static enum drm_mode_status zx_hdmi_connector_mode_valid(struct drm_connector *connector, struct drm_display_mode *mode) { return MODE_OK; } static struct drm_connector_helper_funcs zx_hdmi_connector_helper_funcs = { .get_modes = zx_hdmi_connector_get_modes, .mode_valid = zx_hdmi_connector_mode_valid, }; static enum drm_connector_status zx_hdmi_connector_detect(struct drm_connector *connector, bool force) { struct zx_hdmi *hdmi = to_zx_hdmi(connector); return (hdmi_readb(hdmi, TPI_HPD_RSEN) & TPI_HPD_CONNECTION) ? connector_status_connected : connector_status_disconnected; } static const struct drm_connector_funcs zx_hdmi_connector_funcs = { .dpms = drm_atomic_helper_connector_dpms, .fill_modes = drm_helper_probe_single_connector_modes, .detect = zx_hdmi_connector_detect, .destroy = drm_connector_cleanup, .reset = drm_atomic_helper_connector_reset, .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, }; static int zx_hdmi_register(struct drm_device *drm, struct zx_hdmi *hdmi) { struct drm_encoder *encoder = &hdmi->encoder; encoder->possible_crtcs = VOU_CRTC_MASK; drm_encoder_init(drm, encoder, &zx_hdmi_encoder_funcs, DRM_MODE_ENCODER_TMDS, NULL); drm_encoder_helper_add(encoder, &zx_hdmi_encoder_helper_funcs); hdmi->connector.polled = DRM_CONNECTOR_POLL_HPD; drm_connector_init(drm, &hdmi->connector, &zx_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA); drm_connector_helper_add(&hdmi->connector, &zx_hdmi_connector_helper_funcs); drm_mode_connector_attach_encoder(&hdmi->connector, encoder); return 0; } static irqreturn_t zx_hdmi_irq_thread(int irq, void *dev_id) { struct zx_hdmi *hdmi = dev_id; drm_helper_hpd_irq_event(hdmi->connector.dev); return IRQ_HANDLED; } static irqreturn_t zx_hdmi_irq_handler(int irq, void *dev_id) { struct zx_hdmi *hdmi = dev_id; u8 lstat; lstat = hdmi_readb(hdmi, L1_INTR_STAT); /* Monitor detect/HPD interrupt */ if (lstat & L1_INTR_STAT_INTR1) { u8 stat; stat = hdmi_readb(hdmi, INTR1_STAT); hdmi_writeb(hdmi, INTR1_STAT, stat); if (stat & INTR1_MONITOR_DETECT) return IRQ_WAKE_THREAD; } return IRQ_NONE; } static int zx_hdmi_audio_startup(struct device *dev, void *data) { struct zx_hdmi *hdmi = dev_get_drvdata(dev); struct drm_encoder *encoder = &hdmi->encoder; vou_inf_hdmi_audio_sel(encoder->crtc, VOU_HDMI_AUD_SPDIF); return 0; } static void zx_hdmi_audio_shutdown(struct device *dev, void *data) { struct zx_hdmi *hdmi = dev_get_drvdata(dev); /* Disable audio input */ hdmi_writeb_mask(hdmi, AUD_EN, AUD_IN_EN, 0); } static inline int zx_hdmi_audio_get_n(unsigned int fs) { unsigned int n; if (fs && (fs % 44100) == 0) n = 6272 * (fs / 44100); else n = fs * 128 / 1000; return n; } static int zx_hdmi_audio_hw_params(struct device *dev, void *data, struct hdmi_codec_daifmt *daifmt, struct hdmi_codec_params *params) { struct zx_hdmi *hdmi = dev_get_drvdata(dev); struct hdmi_audio_infoframe *cea = ¶ms->cea; union hdmi_infoframe frame; int n; /* We only support spdif for now */ if (daifmt->fmt != HDMI_SPDIF) { DRM_DEV_ERROR(hdmi->dev, "invalid daifmt %d\n", daifmt->fmt); return -EINVAL; } switch (params->sample_width) { case 16: hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK, SPDIF_SAMPLE_SIZE_16BIT); break; case 20: hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK, SPDIF_SAMPLE_SIZE_20BIT); break; case 24: hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, SPDIF_SAMPLE_SIZE_MASK, SPDIF_SAMPLE_SIZE_24BIT); break; default: DRM_DEV_ERROR(hdmi->dev, "invalid sample width %d\n", params->sample_width); return -EINVAL; } /* CTS is calculated by hardware, and we only need to take care of N */ n = zx_hdmi_audio_get_n(params->sample_rate); hdmi_writeb(hdmi, N_SVAL1, n & 0xff); hdmi_writeb(hdmi, N_SVAL2, (n >> 8) & 0xff); hdmi_writeb(hdmi, N_SVAL3, (n >> 16) & 0xf); /* Enable spdif mode */ hdmi_writeb_mask(hdmi, AUD_MODE, SPDIF_EN, SPDIF_EN); /* Enable audio input */ hdmi_writeb_mask(hdmi, AUD_EN, AUD_IN_EN, AUD_IN_EN); memcpy(&frame.audio, cea, sizeof(*cea)); return zx_hdmi_infoframe_trans(hdmi, &frame, FSEL_AUDIO); } static int zx_hdmi_audio_digital_mute(struct device *dev, void *data, bool enable) { struct zx_hdmi *hdmi = dev_get_drvdata(dev); if (enable) hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, TPI_AUD_MUTE, TPI_AUD_MUTE); else hdmi_writeb_mask(hdmi, TPI_AUD_CONFIG, TPI_AUD_MUTE, 0); return 0; } static int zx_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf, size_t len) { struct zx_hdmi *hdmi = dev_get_drvdata(dev); struct drm_connector *connector = &hdmi->connector; memcpy(buf, connector->eld, min(sizeof(connector->eld), len)); return 0; } static const struct hdmi_codec_ops zx_hdmi_codec_ops = { .audio_startup = zx_hdmi_audio_startup, .hw_params = zx_hdmi_audio_hw_params, .audio_shutdown = zx_hdmi_audio_shutdown, .digital_mute = zx_hdmi_audio_digital_mute, .get_eld = zx_hdmi_audio_get_eld, }; static struct hdmi_codec_pdata zx_hdmi_codec_pdata = { .ops = &zx_hdmi_codec_ops, .spdif = 1, }; static int zx_hdmi_audio_register(struct zx_hdmi *hdmi) { struct platform_device *pdev; pdev = platform_device_register_data(hdmi->dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO, &zx_hdmi_codec_pdata, sizeof(zx_hdmi_codec_pdata)); if (IS_ERR(pdev)) return PTR_ERR(pdev); hdmi->audio_pdev = pdev; return 0; } static int zx_hdmi_i2c_read(struct zx_hdmi *hdmi, struct i2c_msg *msg) { int len = msg->len; u8 *buf = msg->buf; int retry = 0; int ret = 0; /* Bits [9:8] of bytes */ hdmi_writeb(hdmi, ZX_DDC_DIN_CNT2, (len >> 8) & 0xff); /* Bits [7:0] of bytes */ hdmi_writeb(hdmi, ZX_DDC_DIN_CNT1, len & 0xff); /* Clear FIFO */ hdmi_writeb_mask(hdmi, ZX_DDC_CMD, DDC_CMD_MASK, DDC_CMD_CLEAR_FIFO); /* Kick off the read */ hdmi_writeb_mask(hdmi, ZX_DDC_CMD, DDC_CMD_MASK, DDC_CMD_SEQUENTIAL_READ); while (len > 0) { int cnt, i; /* FIFO needs some time to get ready */ usleep_range(500, 1000); cnt = hdmi_readb(hdmi, ZX_DDC_DOUT_CNT) & DDC_DOUT_CNT_MASK; if (cnt == 0) { if (++retry > 5) { DRM_DEV_ERROR(hdmi->dev, "DDC FIFO read timed out!"); return -ETIMEDOUT; } continue; } for (i = 0; i < cnt; i++) *buf++ = hdmi_readb(hdmi, ZX_DDC_DATA); len -= cnt; } return ret; } static int zx_hdmi_i2c_write(struct zx_hdmi *hdmi, struct i2c_msg *msg) { /* * The DDC I2C adapter is only for reading EDID data, so we assume * that the write to this adapter must be the EDID data offset. */ if ((msg->len != 1) || ((msg->addr != DDC_ADDR) && (msg->addr != DDC_SEGMENT_ADDR))) return -EINVAL; if (msg->addr == DDC_SEGMENT_ADDR) hdmi_writeb(hdmi, ZX_DDC_SEGM, msg->addr << 1); else if (msg->addr == DDC_ADDR) hdmi_writeb(hdmi, ZX_DDC_ADDR, msg->addr << 1); hdmi_writeb(hdmi, ZX_DDC_OFFSET, msg->buf[0]); return 0; } static int zx_hdmi_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num) { struct zx_hdmi *hdmi = i2c_get_adapdata(adap); struct zx_hdmi_i2c *ddc = hdmi->ddc; int i, ret = 0; mutex_lock(&ddc->lock); /* Enable DDC master access */ hdmi_writeb_mask(hdmi, TPI_DDC_MASTER_EN, HW_DDC_MASTER, HW_DDC_MASTER); for (i = 0; i < num; i++) { DRM_DEV_DEBUG(hdmi->dev, "xfer: num: %d/%d, len: %d, flags: %#x\n", i + 1, num, msgs[i].len, msgs[i].flags); if (msgs[i].flags & I2C_M_RD) ret = zx_hdmi_i2c_read(hdmi, &msgs[i]); else ret = zx_hdmi_i2c_write(hdmi, &msgs[i]); if (ret < 0) break; } if (!ret) ret = num; /* Disable DDC master access */ hdmi_writeb_mask(hdmi, TPI_DDC_MASTER_EN, HW_DDC_MASTER, 0); mutex_unlock(&ddc->lock); return ret; } static u32 zx_hdmi_i2c_func(struct i2c_adapter *adapter) { return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; } static const struct i2c_algorithm zx_hdmi_algorithm = { .master_xfer = zx_hdmi_i2c_xfer, .functionality = zx_hdmi_i2c_func, }; static int zx_hdmi_ddc_register(struct zx_hdmi *hdmi) { struct i2c_adapter *adap; struct zx_hdmi_i2c *ddc; int ret; ddc = devm_kzalloc(hdmi->dev, sizeof(*ddc), GFP_KERNEL); if (!ddc) return -ENOMEM; hdmi->ddc = ddc; mutex_init(&ddc->lock); adap = &ddc->adap; adap->owner = THIS_MODULE; adap->class = I2C_CLASS_DDC; adap->dev.parent = hdmi->dev; adap->algo = &zx_hdmi_algorithm; snprintf(adap->name, sizeof(adap->name), "zx hdmi i2c"); ret = i2c_add_adapter(adap); if (ret) { DRM_DEV_ERROR(hdmi->dev, "failed to add I2C adapter: %d\n", ret); return ret; } i2c_set_adapdata(adap, hdmi); return 0; } static int zx_hdmi_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); struct drm_device *drm = data; struct resource *res; struct zx_hdmi *hdmi; int irq; int ret; hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); if (!hdmi) return -ENOMEM; hdmi->dev = dev; hdmi->drm = drm; dev_set_drvdata(dev, hdmi); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hdmi->mmio = devm_ioremap_resource(dev, res); if (IS_ERR(hdmi->mmio)) { ret = PTR_ERR(hdmi->mmio); DRM_DEV_ERROR(dev, "failed to remap hdmi region: %d\n", ret); return ret; } irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; hdmi->cec_clk = devm_clk_get(hdmi->dev, "osc_cec"); if (IS_ERR(hdmi->cec_clk)) { ret = PTR_ERR(hdmi->cec_clk); DRM_DEV_ERROR(dev, "failed to get cec_clk: %d\n", ret); return ret; } hdmi->osc_clk = devm_clk_get(hdmi->dev, "osc_clk"); if (IS_ERR(hdmi->osc_clk)) { ret = PTR_ERR(hdmi->osc_clk); DRM_DEV_ERROR(dev, "failed to get osc_clk: %d\n", ret); return ret; } hdmi->xclk = devm_clk_get(hdmi->dev, "xclk"); if (IS_ERR(hdmi->xclk)) { ret = PTR_ERR(hdmi->xclk); DRM_DEV_ERROR(dev, "failed to get xclk: %d\n", ret); return ret; } ret = zx_hdmi_ddc_register(hdmi); if (ret) { DRM_DEV_ERROR(dev, "failed to register ddc: %d\n", ret); return ret; } ret = zx_hdmi_audio_register(hdmi); if (ret) { DRM_DEV_ERROR(dev, "failed to register audio: %d\n", ret); return ret; } ret = zx_hdmi_register(drm, hdmi); if (ret) { DRM_DEV_ERROR(dev, "failed to register hdmi: %d\n", ret); return ret; } ret = devm_request_threaded_irq(dev, irq, zx_hdmi_irq_handler, zx_hdmi_irq_thread, IRQF_SHARED, dev_name(dev), hdmi); if (ret) { DRM_DEV_ERROR(dev, "failed to request threaded irq: %d\n", ret); return ret; } return 0; } static void zx_hdmi_unbind(struct device *dev, struct device *master, void *data) { struct zx_hdmi *hdmi = dev_get_drvdata(dev); hdmi->connector.funcs->destroy(&hdmi->connector); hdmi->encoder.funcs->destroy(&hdmi->encoder); if (hdmi->audio_pdev) platform_device_unregister(hdmi->audio_pdev); } static const struct component_ops zx_hdmi_component_ops = { .bind = zx_hdmi_bind, .unbind = zx_hdmi_unbind, }; static int zx_hdmi_probe(struct platform_device *pdev) { return component_add(&pdev->dev, &zx_hdmi_component_ops); } static int zx_hdmi_remove(struct platform_device *pdev) { component_del(&pdev->dev, &zx_hdmi_component_ops); return 0; } static const struct of_device_id zx_hdmi_of_match[] = { { .compatible = "zte,zx296718-hdmi", }, { /* end */ }, }; MODULE_DEVICE_TABLE(of, zx_hdmi_of_match); struct platform_driver zx_hdmi_driver = { .probe = zx_hdmi_probe, .remove = zx_hdmi_remove, .driver = { .name = "zx-hdmi", .of_match_table = zx_hdmi_of_match, }, };