// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2016 Maxime Ripard * * Maxime Ripard */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "sun4i_backend.h" #include "sun4i_crtc.h" #include "sun4i_drv.h" #include "sun4i_hdmi.h" static inline struct sun4i_hdmi * drm_encoder_to_sun4i_hdmi(struct drm_encoder *encoder) { return container_of(encoder, struct sun4i_hdmi, encoder); } static inline struct sun4i_hdmi * drm_connector_to_sun4i_hdmi(struct drm_connector *connector) { return container_of(connector, struct sun4i_hdmi, connector); } static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi, struct drm_display_mode *mode) { struct hdmi_avi_infoframe frame; u8 buffer[17]; int i, ret; ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, &hdmi->connector, mode); if (ret < 0) { DRM_ERROR("Failed to get infoframes from mode\n"); return ret; } ret = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer)); if (ret < 0) { DRM_ERROR("Failed to pack infoframes\n"); return ret; } for (i = 0; i < sizeof(buffer); i++) writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i)); return 0; } static int sun4i_hdmi_atomic_check(struct drm_encoder *encoder, struct drm_crtc_state *crtc_state, struct drm_connector_state *conn_state) { struct drm_display_mode *mode = &crtc_state->mode; if (mode->flags & DRM_MODE_FLAG_DBLCLK) return -EINVAL; return 0; } static void sun4i_hdmi_disable(struct drm_encoder *encoder) { struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder); u32 val; DRM_DEBUG_DRIVER("Disabling the HDMI Output\n"); val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG); val &= ~SUN4I_HDMI_VID_CTRL_ENABLE; writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG); clk_disable_unprepare(hdmi->tmds_clk); } static void sun4i_hdmi_enable(struct drm_encoder *encoder) { struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder); u32 val = 0; DRM_DEBUG_DRIVER("Enabling the HDMI Output\n"); clk_prepare_enable(hdmi->tmds_clk); sun4i_hdmi_setup_avi_infoframes(hdmi, mode); val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI); val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END); writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0)); val = SUN4I_HDMI_VID_CTRL_ENABLE; if (hdmi->hdmi_monitor) val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE; writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG); } static void sun4i_hdmi_mode_set(struct drm_encoder *encoder, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder); unsigned int x, y; u32 val; clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000); clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000); /* Set input sync enable */ writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC, hdmi->base + SUN4I_HDMI_UNKNOWN_REG); /* * Setup output pad (?) controls * * This is done here instead of at probe/bind time because * the controller seems to toggle some of the bits on its own. * * We can't just initialize the register there, we need to * protect the clock bits that have already been read out and * cached by the clock framework. */ val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG); val &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK; val |= hdmi->variant->pad_ctrl1_init_val; writel(val, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG); val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG); /* Setup timing registers */ writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) | SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay), hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG); x = mode->htotal - mode->hsync_start; y = mode->vtotal - mode->vsync_start; writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y), hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG); x = mode->hsync_start - mode->hdisplay; y = mode->vsync_start - mode->vdisplay; writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y), hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG); x = mode->hsync_end - mode->hsync_start; y = mode->vsync_end - mode->vsync_start; writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y), hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG); val = SUN4I_HDMI_VID_TIMING_POL_TX_CLK; if (mode->flags & DRM_MODE_FLAG_PHSYNC) val |= SUN4I_HDMI_VID_TIMING_POL_HSYNC; if (mode->flags & DRM_MODE_FLAG_PVSYNC) val |= SUN4I_HDMI_VID_TIMING_POL_VSYNC; writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG); } static enum drm_mode_status sun4i_hdmi_mode_valid(struct drm_encoder *encoder, const struct drm_display_mode *mode) { struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder); unsigned long rate = mode->clock * 1000; unsigned long diff = rate / 200; /* +-0.5% allowed by HDMI spec */ long rounded_rate; /* 165 MHz is the typical max pixelclock frequency for HDMI <= 1.2 */ if (rate > 165000000) return MODE_CLOCK_HIGH; rounded_rate = clk_round_rate(hdmi->tmds_clk, rate); if (rounded_rate > 0 && max_t(unsigned long, rounded_rate, rate) - min_t(unsigned long, rounded_rate, rate) < diff) return MODE_OK; return MODE_NOCLOCK; } static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs = { .atomic_check = sun4i_hdmi_atomic_check, .disable = sun4i_hdmi_disable, .enable = sun4i_hdmi_enable, .mode_set = sun4i_hdmi_mode_set, .mode_valid = sun4i_hdmi_mode_valid, }; static const struct drm_encoder_funcs sun4i_hdmi_funcs = { .destroy = drm_encoder_cleanup, }; static int sun4i_hdmi_get_modes(struct drm_connector *connector) { struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector); struct edid *edid; int ret; edid = drm_get_edid(connector, hdmi->ddc_i2c ?: hdmi->i2c); if (!edid) return 0; hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid); DRM_DEBUG_DRIVER("Monitor is %s monitor\n", hdmi->hdmi_monitor ? "an HDMI" : "a DVI"); drm_connector_update_edid_property(connector, edid); cec_s_phys_addr_from_edid(hdmi->cec_adap, edid); ret = drm_add_edid_modes(connector, edid); kfree(edid); return ret; } static struct i2c_adapter *sun4i_hdmi_get_ddc(struct device *dev) { struct device_node *phandle, *remote; struct i2c_adapter *ddc; remote = of_graph_get_remote_node(dev->of_node, 1, -1); if (!remote) return ERR_PTR(-EINVAL); phandle = of_parse_phandle(remote, "ddc-i2c-bus", 0); of_node_put(remote); if (!phandle) return ERR_PTR(-ENODEV); ddc = of_get_i2c_adapter_by_node(phandle); of_node_put(phandle); if (!ddc) return ERR_PTR(-EPROBE_DEFER); return ddc; } static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = { .get_modes = sun4i_hdmi_get_modes, }; static enum drm_connector_status sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force) { struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector); unsigned long reg; if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_HPD_REG, reg, reg & SUN4I_HDMI_HPD_HIGH, 0, 500000)) { cec_phys_addr_invalidate(hdmi->cec_adap); return connector_status_disconnected; } return connector_status_connected; } static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = { .detect = sun4i_hdmi_connector_detect, .fill_modes = drm_helper_probe_single_connector_modes, .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, }; #ifdef CONFIG_DRM_SUN4I_HDMI_CEC static bool sun4i_hdmi_cec_pin_read(struct cec_adapter *adap) { struct sun4i_hdmi *hdmi = cec_get_drvdata(adap); return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX; } static void sun4i_hdmi_cec_pin_low(struct cec_adapter *adap) { struct sun4i_hdmi *hdmi = cec_get_drvdata(adap); /* Start driving the CEC pin low */ writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC); } static void sun4i_hdmi_cec_pin_high(struct cec_adapter *adap) { struct sun4i_hdmi *hdmi = cec_get_drvdata(adap); /* * Stop driving the CEC pin, the pull up will take over * unless another CEC device is driving the pin low. */ writel(0, hdmi->base + SUN4I_HDMI_CEC); } static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = { .read = sun4i_hdmi_cec_pin_read, .low = sun4i_hdmi_cec_pin_low, .high = sun4i_hdmi_cec_pin_high, }; #endif #define SUN4I_HDMI_PAD_CTRL1_MASK (GENMASK(24, 7) | GENMASK(5, 0)) #define SUN4I_HDMI_PLL_CTRL_MASK (GENMASK(31, 8) | GENMASK(3, 0)) /* Only difference from sun5i is AMP is 4 instead of 6 */ static const struct sun4i_hdmi_variant sun4i_variant = { .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN | SUN4I_HDMI_PAD_CTRL0_CKEN | SUN4I_HDMI_PAD_CTRL0_PWENG | SUN4I_HDMI_PAD_CTRL0_PWEND | SUN4I_HDMI_PAD_CTRL0_PWENC | SUN4I_HDMI_PAD_CTRL0_LDODEN | SUN4I_HDMI_PAD_CTRL0_LDOCEN | SUN4I_HDMI_PAD_CTRL0_BIASEN, .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(4) | SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) | SUN4I_HDMI_PAD_CTRL1_REG_DENCK | SUN4I_HDMI_PAD_CTRL1_REG_DEN | SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT | SUN4I_HDMI_PAD_CTRL1_EMP_OPT | SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT | SUN4I_HDMI_PAD_CTRL1_AMP_OPT, .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) | SUN4I_HDMI_PLL_CTRL_CS(7) | SUN4I_HDMI_PLL_CTRL_CP_S(15) | SUN4I_HDMI_PLL_CTRL_S(7) | SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) | SUN4I_HDMI_PLL_CTRL_SDIV2 | SUN4I_HDMI_PLL_CTRL_LDO2_EN | SUN4I_HDMI_PLL_CTRL_LDO1_EN | SUN4I_HDMI_PLL_CTRL_HV_IS_33 | SUN4I_HDMI_PLL_CTRL_BWS | SUN4I_HDMI_PLL_CTRL_PLL_EN, .ddc_clk_reg = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6), .ddc_clk_pre_divider = 2, .ddc_clk_m_offset = 1, .field_ddc_en = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31), .field_ddc_start = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30), .field_ddc_reset = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0), .field_ddc_addr_reg = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31), .field_ddc_slave_addr = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6), .field_ddc_int_status = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8), .field_ddc_fifo_clear = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31), .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7), .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3), .field_ddc_byte_count = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9), .field_ddc_cmd = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2), .field_ddc_sda_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9), .field_ddc_sck_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8), .ddc_fifo_reg = SUN4I_HDMI_DDC_FIFO_DATA_REG, .ddc_fifo_has_dir = true, }; static const struct sun4i_hdmi_variant sun5i_variant = { .pad_ctrl0_init_val = SUN4I_HDMI_PAD_CTRL0_TXEN | SUN4I_HDMI_PAD_CTRL0_CKEN | SUN4I_HDMI_PAD_CTRL0_PWENG | SUN4I_HDMI_PAD_CTRL0_PWEND | SUN4I_HDMI_PAD_CTRL0_PWENC | SUN4I_HDMI_PAD_CTRL0_LDODEN | SUN4I_HDMI_PAD_CTRL0_LDOCEN | SUN4I_HDMI_PAD_CTRL0_BIASEN, .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) | SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) | SUN4I_HDMI_PAD_CTRL1_REG_DENCK | SUN4I_HDMI_PAD_CTRL1_REG_DEN | SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT | SUN4I_HDMI_PAD_CTRL1_EMP_OPT | SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT | SUN4I_HDMI_PAD_CTRL1_AMP_OPT, .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) | SUN4I_HDMI_PLL_CTRL_CS(7) | SUN4I_HDMI_PLL_CTRL_CP_S(15) | SUN4I_HDMI_PLL_CTRL_S(7) | SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) | SUN4I_HDMI_PLL_CTRL_SDIV2 | SUN4I_HDMI_PLL_CTRL_LDO2_EN | SUN4I_HDMI_PLL_CTRL_LDO1_EN | SUN4I_HDMI_PLL_CTRL_HV_IS_33 | SUN4I_HDMI_PLL_CTRL_BWS | SUN4I_HDMI_PLL_CTRL_PLL_EN, .ddc_clk_reg = REG_FIELD(SUN4I_HDMI_DDC_CLK_REG, 0, 6), .ddc_clk_pre_divider = 2, .ddc_clk_m_offset = 1, .field_ddc_en = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 31, 31), .field_ddc_start = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 30, 30), .field_ddc_reset = REG_FIELD(SUN4I_HDMI_DDC_CTRL_REG, 0, 0), .field_ddc_addr_reg = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 31), .field_ddc_slave_addr = REG_FIELD(SUN4I_HDMI_DDC_ADDR_REG, 0, 6), .field_ddc_int_status = REG_FIELD(SUN4I_HDMI_DDC_INT_STATUS_REG, 0, 8), .field_ddc_fifo_clear = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 31, 31), .field_ddc_fifo_rx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 4, 7), .field_ddc_fifo_tx_thres = REG_FIELD(SUN4I_HDMI_DDC_FIFO_CTRL_REG, 0, 3), .field_ddc_byte_count = REG_FIELD(SUN4I_HDMI_DDC_BYTE_COUNT_REG, 0, 9), .field_ddc_cmd = REG_FIELD(SUN4I_HDMI_DDC_CMD_REG, 0, 2), .field_ddc_sda_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 9, 9), .field_ddc_sck_en = REG_FIELD(SUN4I_HDMI_DDC_LINE_CTRL_REG, 8, 8), .ddc_fifo_reg = SUN4I_HDMI_DDC_FIFO_DATA_REG, .ddc_fifo_has_dir = true, }; static const struct sun4i_hdmi_variant sun6i_variant = { .has_ddc_parent_clk = true, .has_reset_control = true, .pad_ctrl0_init_val = 0xff | SUN4I_HDMI_PAD_CTRL0_TXEN | SUN4I_HDMI_PAD_CTRL0_CKEN | SUN4I_HDMI_PAD_CTRL0_PWENG | SUN4I_HDMI_PAD_CTRL0_PWEND | SUN4I_HDMI_PAD_CTRL0_PWENC | SUN4I_HDMI_PAD_CTRL0_LDODEN | SUN4I_HDMI_PAD_CTRL0_LDOCEN, .pad_ctrl1_init_val = SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) | SUN4I_HDMI_PAD_CTRL1_REG_EMP(4) | SUN4I_HDMI_PAD_CTRL1_REG_DENCK | SUN4I_HDMI_PAD_CTRL1_REG_DEN | SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT | SUN4I_HDMI_PAD_CTRL1_EMP_OPT | SUN4I_HDMI_PAD_CTRL1_PWSDT | SUN4I_HDMI_PAD_CTRL1_PWSCK | SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT | SUN4I_HDMI_PAD_CTRL1_AMP_OPT | SUN4I_HDMI_PAD_CTRL1_UNKNOWN, .pll_ctrl_init_val = SUN4I_HDMI_PLL_CTRL_VCO_S(8) | SUN4I_HDMI_PLL_CTRL_CS(3) | SUN4I_HDMI_PLL_CTRL_CP_S(10) | SUN4I_HDMI_PLL_CTRL_S(4) | SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) | SUN4I_HDMI_PLL_CTRL_SDIV2 | SUN4I_HDMI_PLL_CTRL_LDO2_EN | SUN4I_HDMI_PLL_CTRL_LDO1_EN | SUN4I_HDMI_PLL_CTRL_HV_IS_33 | SUN4I_HDMI_PLL_CTRL_PLL_EN, .ddc_clk_reg = REG_FIELD(SUN6I_HDMI_DDC_CLK_REG, 0, 6), .ddc_clk_pre_divider = 1, .ddc_clk_m_offset = 2, .tmds_clk_div_offset = 1, .field_ddc_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 0, 0), .field_ddc_start = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 27, 27), .field_ddc_reset = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 31, 31), .field_ddc_addr_reg = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 31), .field_ddc_slave_addr = REG_FIELD(SUN6I_HDMI_DDC_ADDR_REG, 1, 7), .field_ddc_int_status = REG_FIELD(SUN6I_HDMI_DDC_INT_STATUS_REG, 0, 8), .field_ddc_fifo_clear = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 18, 18), .field_ddc_fifo_rx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 4, 7), .field_ddc_fifo_tx_thres = REG_FIELD(SUN6I_HDMI_DDC_FIFO_CTRL_REG, 0, 3), .field_ddc_byte_count = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 16, 25), .field_ddc_cmd = REG_FIELD(SUN6I_HDMI_DDC_CMD_REG, 0, 2), .field_ddc_sda_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 6, 6), .field_ddc_sck_en = REG_FIELD(SUN6I_HDMI_DDC_CTRL_REG, 4, 4), .ddc_fifo_reg = SUN6I_HDMI_DDC_FIFO_DATA_REG, .ddc_fifo_thres_incl = true, }; static const struct regmap_config sun4i_hdmi_regmap_config = { .reg_bits = 32, .val_bits = 32, .reg_stride = 4, .max_register = 0x580, }; static int sun4i_hdmi_bind(struct device *dev, struct device *master, void *data) { struct platform_device *pdev = to_platform_device(dev); struct drm_device *drm = data; struct sun4i_drv *drv = drm->dev_private; struct sun4i_hdmi *hdmi; struct resource *res; u32 reg; int ret; hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL); if (!hdmi) return -ENOMEM; dev_set_drvdata(dev, hdmi); hdmi->dev = dev; hdmi->drv = drv; hdmi->variant = of_device_get_match_data(dev); if (!hdmi->variant) return -EINVAL; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hdmi->base = devm_ioremap_resource(dev, res); if (IS_ERR(hdmi->base)) { dev_err(dev, "Couldn't map the HDMI encoder registers\n"); return PTR_ERR(hdmi->base); } if (hdmi->variant->has_reset_control) { hdmi->reset = devm_reset_control_get(dev, NULL); if (IS_ERR(hdmi->reset)) { dev_err(dev, "Couldn't get the HDMI reset control\n"); return PTR_ERR(hdmi->reset); } ret = reset_control_deassert(hdmi->reset); if (ret) { dev_err(dev, "Couldn't deassert HDMI reset\n"); return ret; } } hdmi->bus_clk = devm_clk_get(dev, "ahb"); if (IS_ERR(hdmi->bus_clk)) { dev_err(dev, "Couldn't get the HDMI bus clock\n"); ret = PTR_ERR(hdmi->bus_clk); goto err_assert_reset; } clk_prepare_enable(hdmi->bus_clk); hdmi->mod_clk = devm_clk_get(dev, "mod"); if (IS_ERR(hdmi->mod_clk)) { dev_err(dev, "Couldn't get the HDMI mod clock\n"); ret = PTR_ERR(hdmi->mod_clk); goto err_disable_bus_clk; } clk_prepare_enable(hdmi->mod_clk); hdmi->pll0_clk = devm_clk_get(dev, "pll-0"); if (IS_ERR(hdmi->pll0_clk)) { dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n"); ret = PTR_ERR(hdmi->pll0_clk); goto err_disable_mod_clk; } hdmi->pll1_clk = devm_clk_get(dev, "pll-1"); if (IS_ERR(hdmi->pll1_clk)) { dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n"); ret = PTR_ERR(hdmi->pll1_clk); goto err_disable_mod_clk; } hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base, &sun4i_hdmi_regmap_config); if (IS_ERR(hdmi->regmap)) { dev_err(dev, "Couldn't create HDMI encoder regmap\n"); ret = PTR_ERR(hdmi->regmap); goto err_disable_mod_clk; } ret = sun4i_tmds_create(hdmi); if (ret) { dev_err(dev, "Couldn't create the TMDS clock\n"); goto err_disable_mod_clk; } if (hdmi->variant->has_ddc_parent_clk) { hdmi->ddc_parent_clk = devm_clk_get(dev, "ddc"); if (IS_ERR(hdmi->ddc_parent_clk)) { dev_err(dev, "Couldn't get the HDMI DDC clock\n"); ret = PTR_ERR(hdmi->ddc_parent_clk); goto err_disable_mod_clk; } } else { hdmi->ddc_parent_clk = hdmi->tmds_clk; } writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG); writel(hdmi->variant->pad_ctrl0_init_val, hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG); reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK; reg |= hdmi->variant->pll_ctrl_init_val; writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); ret = sun4i_hdmi_i2c_create(dev, hdmi); if (ret) { dev_err(dev, "Couldn't create the HDMI I2C adapter\n"); goto err_disable_mod_clk; } hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev); if (IS_ERR(hdmi->ddc_i2c)) { ret = PTR_ERR(hdmi->ddc_i2c); if (ret == -ENODEV) hdmi->ddc_i2c = NULL; else goto err_del_i2c_adapter; } drm_encoder_helper_add(&hdmi->encoder, &sun4i_hdmi_helper_funcs); ret = drm_encoder_init(drm, &hdmi->encoder, &sun4i_hdmi_funcs, DRM_MODE_ENCODER_TMDS, NULL); if (ret) { dev_err(dev, "Couldn't initialise the HDMI encoder\n"); goto err_put_ddc_i2c; } hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node); if (!hdmi->encoder.possible_crtcs) { ret = -EPROBE_DEFER; goto err_put_ddc_i2c; } #ifdef CONFIG_DRM_SUN4I_HDMI_CEC hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops, hdmi, "sun4i", CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS | CEC_CAP_PASSTHROUGH | CEC_CAP_RC); ret = PTR_ERR_OR_ZERO(hdmi->cec_adap); if (ret < 0) goto err_cleanup_connector; writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX, hdmi->base + SUN4I_HDMI_CEC); #endif drm_connector_helper_add(&hdmi->connector, &sun4i_hdmi_connector_helper_funcs); ret = drm_connector_init(drm, &hdmi->connector, &sun4i_hdmi_connector_funcs, DRM_MODE_CONNECTOR_HDMIA); if (ret) { dev_err(dev, "Couldn't initialise the HDMI connector\n"); goto err_cleanup_connector; } /* There is no HPD interrupt, so we need to poll the controller */ hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT; ret = cec_register_adapter(hdmi->cec_adap, dev); if (ret < 0) goto err_cleanup_connector; drm_connector_attach_encoder(&hdmi->connector, &hdmi->encoder); return 0; err_cleanup_connector: cec_delete_adapter(hdmi->cec_adap); drm_encoder_cleanup(&hdmi->encoder); err_put_ddc_i2c: i2c_put_adapter(hdmi->ddc_i2c); err_del_i2c_adapter: i2c_del_adapter(hdmi->i2c); err_disable_mod_clk: clk_disable_unprepare(hdmi->mod_clk); err_disable_bus_clk: clk_disable_unprepare(hdmi->bus_clk); err_assert_reset: reset_control_assert(hdmi->reset); return ret; } static void sun4i_hdmi_unbind(struct device *dev, struct device *master, void *data) { struct sun4i_hdmi *hdmi = dev_get_drvdata(dev); cec_unregister_adapter(hdmi->cec_adap); i2c_del_adapter(hdmi->i2c); i2c_put_adapter(hdmi->ddc_i2c); clk_disable_unprepare(hdmi->mod_clk); clk_disable_unprepare(hdmi->bus_clk); } static const struct component_ops sun4i_hdmi_ops = { .bind = sun4i_hdmi_bind, .unbind = sun4i_hdmi_unbind, }; static int sun4i_hdmi_probe(struct platform_device *pdev) { return component_add(&pdev->dev, &sun4i_hdmi_ops); } static int sun4i_hdmi_remove(struct platform_device *pdev) { component_del(&pdev->dev, &sun4i_hdmi_ops); return 0; } static const struct of_device_id sun4i_hdmi_of_table[] = { { .compatible = "allwinner,sun4i-a10-hdmi", .data = &sun4i_variant, }, { .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, }, { .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, }, { } }; MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table); static struct platform_driver sun4i_hdmi_driver = { .probe = sun4i_hdmi_probe, .remove = sun4i_hdmi_remove, .driver = { .name = "sun4i-hdmi", .of_match_table = sun4i_hdmi_of_table, }, }; module_platform_driver(sun4i_hdmi_driver); MODULE_AUTHOR("Maxime Ripard "); MODULE_DESCRIPTION("Allwinner A10 HDMI Driver"); MODULE_LICENSE("GPL");