| /* |
| * Copyright (C) 2016 Maxime Ripard |
| * |
| * Maxime Ripard <maxime.ripard@free-electrons.com> |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| */ |
| |
| #include <drm/drmP.h> |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_edid.h> |
| #include <drm/drm_encoder.h> |
| #include <drm/drm_of.h> |
| #include <drm/drm_panel.h> |
| |
| #include <linux/clk.h> |
| #include <linux/component.h> |
| #include <linux/iopoll.h> |
| #include <linux/platform_device.h> |
| #include <linux/pm_runtime.h> |
| |
| #include "sun4i_backend.h" |
| #include "sun4i_crtc.h" |
| #include "sun4i_drv.h" |
| #include "sun4i_hdmi.h" |
| #include "sun4i_tcon.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, mode, false); |
| 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); |
| struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc); |
| struct sun4i_tcon *tcon = crtc->tcon; |
| 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); |
| |
| sun4i_tcon_channel_disable(tcon, 1); |
| } |
| |
| 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); |
| struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc); |
| struct sun4i_tcon *tcon = crtc->tcon; |
| u32 val = 0; |
| |
| DRM_DEBUG_DRIVER("Enabling the HDMI Output\n"); |
| |
| sun4i_tcon_channel_enable(tcon, 1); |
| |
| 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); |
| struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc); |
| struct sun4i_tcon *tcon = crtc->tcon; |
| unsigned int x, y; |
| u32 val; |
| |
| sun4i_tcon1_mode_set(tcon, mode); |
| sun4i_tcon_set_mux(tcon, 1, encoder); |
| |
| clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000); |
| 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 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 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, |
| }; |
| |
| 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->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_mode_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 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 |
| |
| 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; |
| |
| 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); |
| } |
| |
| 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"); |
| return PTR_ERR(hdmi->bus_clk); |
| } |
| 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; |
| } |
| |
| ret = sun4i_tmds_create(hdmi); |
| if (ret) { |
| dev_err(dev, "Couldn't create the TMDS clock\n"); |
| goto err_disable_mod_clk; |
| } |
| |
| writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG); |
| |
| writel(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, |
| hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG); |
| |
| /* |
| * 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. |
| */ |
| reg = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG); |
| reg &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK; |
| reg |= 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; |
| writel(reg, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG); |
| |
| reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG); |
| reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK; |
| reg |= 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; |
| 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; |
| } |
| |
| 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_del_i2c_adapter; |
| } |
| |
| hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm, |
| dev->of_node); |
| if (!hdmi->encoder.possible_crtcs) { |
| ret = -EPROBE_DEFER; |
| goto err_del_i2c_adapter; |
| } |
| |
| #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_mode_connector_attach_encoder(&hdmi->connector, &hdmi->encoder); |
| |
| return 0; |
| |
| err_cleanup_connector: |
| cec_delete_adapter(hdmi->cec_adap); |
| drm_encoder_cleanup(&hdmi->encoder); |
| 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); |
| 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); |
| drm_connector_cleanup(&hdmi->connector); |
| drm_encoder_cleanup(&hdmi->encoder); |
| i2c_del_adapter(hdmi->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,sun5i-a10s-hdmi" }, |
| { } |
| }; |
| 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 <maxime.ripard@free-electrons.com>"); |
| MODULE_DESCRIPTION("Allwinner A10 HDMI Driver"); |
| MODULE_LICENSE("GPL"); |