| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (c) 2018 Jernej Skrabec <jernej.skrabec@siol.net> |
| */ |
| |
| #include <linux/component.h> |
| #include <linux/module.h> |
| #include <linux/of_device.h> |
| #include <linux/platform_device.h> |
| |
| #include <drm/drm_crtc_helper.h> |
| #include <drm/drm_of.h> |
| #include <drm/drm_simple_kms_helper.h> |
| |
| #include "sun8i_dw_hdmi.h" |
| #include "sun8i_tcon_top.h" |
| |
| static void sun8i_dw_hdmi_encoder_mode_set(struct drm_encoder *encoder, |
| struct drm_display_mode *mode, |
| struct drm_display_mode *adj_mode) |
| { |
| struct sun8i_dw_hdmi *hdmi = encoder_to_sun8i_dw_hdmi(encoder); |
| |
| clk_set_rate(hdmi->clk_tmds, mode->crtc_clock * 1000); |
| } |
| |
| static const struct drm_encoder_helper_funcs |
| sun8i_dw_hdmi_encoder_helper_funcs = { |
| .mode_set = sun8i_dw_hdmi_encoder_mode_set, |
| }; |
| |
| static enum drm_mode_status |
| sun8i_dw_hdmi_mode_valid_a83t(struct dw_hdmi *hdmi, void *data, |
| const struct drm_display_info *info, |
| const struct drm_display_mode *mode) |
| { |
| if (mode->clock > 297000) |
| return MODE_CLOCK_HIGH; |
| |
| return MODE_OK; |
| } |
| |
| static enum drm_mode_status |
| sun8i_dw_hdmi_mode_valid_h6(struct dw_hdmi *hdmi, void *data, |
| const struct drm_display_info *info, |
| const struct drm_display_mode *mode) |
| { |
| /* |
| * Controller support maximum of 594 MHz, which correlates to |
| * 4K@60Hz 4:4:4 or RGB. |
| */ |
| if (mode->clock > 594000) |
| return MODE_CLOCK_HIGH; |
| |
| return MODE_OK; |
| } |
| |
| static bool sun8i_dw_hdmi_node_is_tcon_top(struct device_node *node) |
| { |
| return IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) && |
| !!of_match_node(sun8i_tcon_top_of_table, node); |
| } |
| |
| static u32 sun8i_dw_hdmi_find_possible_crtcs(struct drm_device *drm, |
| struct device_node *node) |
| { |
| struct device_node *port, *ep, *remote, *remote_port; |
| u32 crtcs = 0; |
| |
| remote = of_graph_get_remote_node(node, 0, -1); |
| if (!remote) |
| return 0; |
| |
| if (sun8i_dw_hdmi_node_is_tcon_top(remote)) { |
| port = of_graph_get_port_by_id(remote, 4); |
| if (!port) |
| goto crtcs_exit; |
| |
| for_each_child_of_node(port, ep) { |
| remote_port = of_graph_get_remote_port(ep); |
| if (remote_port) { |
| crtcs |= drm_of_crtc_port_mask(drm, remote_port); |
| of_node_put(remote_port); |
| } |
| } |
| } else { |
| crtcs = drm_of_find_possible_crtcs(drm, node); |
| } |
| |
| crtcs_exit: |
| of_node_put(remote); |
| |
| return crtcs; |
| } |
| |
| static int sun8i_dw_hdmi_find_connector_pdev(struct device *dev, |
| struct platform_device **pdev_out) |
| { |
| struct platform_device *pdev; |
| struct device_node *remote; |
| |
| remote = of_graph_get_remote_node(dev->of_node, 1, -1); |
| if (!remote) |
| return -ENODEV; |
| |
| if (!of_device_is_compatible(remote, "hdmi-connector")) { |
| of_node_put(remote); |
| return -ENODEV; |
| } |
| |
| pdev = of_find_device_by_node(remote); |
| of_node_put(remote); |
| if (!pdev) |
| return -ENODEV; |
| |
| *pdev_out = pdev; |
| return 0; |
| } |
| |
| static int sun8i_dw_hdmi_bind(struct device *dev, struct device *master, |
| void *data) |
| { |
| struct platform_device *pdev = to_platform_device(dev), *connector_pdev; |
| struct dw_hdmi_plat_data *plat_data; |
| struct drm_device *drm = data; |
| struct device_node *phy_node; |
| struct drm_encoder *encoder; |
| struct sun8i_dw_hdmi *hdmi; |
| int ret; |
| |
| if (!pdev->dev.of_node) |
| return -ENODEV; |
| |
| hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); |
| if (!hdmi) |
| return -ENOMEM; |
| |
| plat_data = &hdmi->plat_data; |
| hdmi->dev = &pdev->dev; |
| encoder = &hdmi->encoder; |
| |
| hdmi->quirks = of_device_get_match_data(dev); |
| |
| encoder->possible_crtcs = |
| sun8i_dw_hdmi_find_possible_crtcs(drm, dev->of_node); |
| /* |
| * If we failed to find the CRTC(s) which this encoder is |
| * supposed to be connected to, it's because the CRTC has |
| * not been registered yet. Defer probing, and hope that |
| * the required CRTC is added later. |
| */ |
| if (encoder->possible_crtcs == 0) |
| return -EPROBE_DEFER; |
| |
| hdmi->rst_ctrl = devm_reset_control_get(dev, "ctrl"); |
| if (IS_ERR(hdmi->rst_ctrl)) { |
| dev_err(dev, "Could not get ctrl reset control\n"); |
| return PTR_ERR(hdmi->rst_ctrl); |
| } |
| |
| hdmi->clk_tmds = devm_clk_get(dev, "tmds"); |
| if (IS_ERR(hdmi->clk_tmds)) { |
| dev_err(dev, "Couldn't get the tmds clock\n"); |
| return PTR_ERR(hdmi->clk_tmds); |
| } |
| |
| hdmi->regulator = devm_regulator_get(dev, "hvcc"); |
| if (IS_ERR(hdmi->regulator)) { |
| dev_err(dev, "Couldn't get regulator\n"); |
| return PTR_ERR(hdmi->regulator); |
| } |
| |
| ret = sun8i_dw_hdmi_find_connector_pdev(dev, &connector_pdev); |
| if (!ret) { |
| hdmi->ddc_en = gpiod_get_optional(&connector_pdev->dev, |
| "ddc-en", GPIOD_OUT_HIGH); |
| platform_device_put(connector_pdev); |
| |
| if (IS_ERR(hdmi->ddc_en)) { |
| dev_err(dev, "Couldn't get ddc-en gpio\n"); |
| return PTR_ERR(hdmi->ddc_en); |
| } |
| } |
| |
| ret = regulator_enable(hdmi->regulator); |
| if (ret) { |
| dev_err(dev, "Failed to enable regulator\n"); |
| goto err_unref_ddc_en; |
| } |
| |
| gpiod_set_value(hdmi->ddc_en, 1); |
| |
| ret = reset_control_deassert(hdmi->rst_ctrl); |
| if (ret) { |
| dev_err(dev, "Could not deassert ctrl reset control\n"); |
| goto err_disable_ddc_en; |
| } |
| |
| ret = clk_prepare_enable(hdmi->clk_tmds); |
| if (ret) { |
| dev_err(dev, "Could not enable tmds clock\n"); |
| goto err_assert_ctrl_reset; |
| } |
| |
| phy_node = of_parse_phandle(dev->of_node, "phys", 0); |
| if (!phy_node) { |
| dev_err(dev, "Can't found PHY phandle\n"); |
| ret = -EINVAL; |
| goto err_disable_clk_tmds; |
| } |
| |
| ret = sun8i_hdmi_phy_get(hdmi, phy_node); |
| of_node_put(phy_node); |
| if (ret) { |
| dev_err(dev, "Couldn't get the HDMI PHY\n"); |
| goto err_disable_clk_tmds; |
| } |
| |
| ret = sun8i_hdmi_phy_init(hdmi->phy); |
| if (ret) |
| goto err_disable_clk_tmds; |
| |
| drm_encoder_helper_add(encoder, &sun8i_dw_hdmi_encoder_helper_funcs); |
| drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS); |
| |
| plat_data->mode_valid = hdmi->quirks->mode_valid; |
| plat_data->use_drm_infoframe = hdmi->quirks->use_drm_infoframe; |
| sun8i_hdmi_phy_set_ops(hdmi->phy, plat_data); |
| |
| platform_set_drvdata(pdev, hdmi); |
| |
| hdmi->hdmi = dw_hdmi_bind(pdev, encoder, plat_data); |
| |
| /* |
| * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(), |
| * which would have called the encoder cleanup. Do it manually. |
| */ |
| if (IS_ERR(hdmi->hdmi)) { |
| ret = PTR_ERR(hdmi->hdmi); |
| goto cleanup_encoder; |
| } |
| |
| return 0; |
| |
| cleanup_encoder: |
| drm_encoder_cleanup(encoder); |
| err_disable_clk_tmds: |
| clk_disable_unprepare(hdmi->clk_tmds); |
| err_assert_ctrl_reset: |
| reset_control_assert(hdmi->rst_ctrl); |
| err_disable_ddc_en: |
| gpiod_set_value(hdmi->ddc_en, 0); |
| regulator_disable(hdmi->regulator); |
| err_unref_ddc_en: |
| if (hdmi->ddc_en) |
| gpiod_put(hdmi->ddc_en); |
| |
| return ret; |
| } |
| |
| static void sun8i_dw_hdmi_unbind(struct device *dev, struct device *master, |
| void *data) |
| { |
| struct sun8i_dw_hdmi *hdmi = dev_get_drvdata(dev); |
| |
| dw_hdmi_unbind(hdmi->hdmi); |
| sun8i_hdmi_phy_deinit(hdmi->phy); |
| clk_disable_unprepare(hdmi->clk_tmds); |
| reset_control_assert(hdmi->rst_ctrl); |
| gpiod_set_value(hdmi->ddc_en, 0); |
| regulator_disable(hdmi->regulator); |
| |
| if (hdmi->ddc_en) |
| gpiod_put(hdmi->ddc_en); |
| } |
| |
| static const struct component_ops sun8i_dw_hdmi_ops = { |
| .bind = sun8i_dw_hdmi_bind, |
| .unbind = sun8i_dw_hdmi_unbind, |
| }; |
| |
| static int sun8i_dw_hdmi_probe(struct platform_device *pdev) |
| { |
| return component_add(&pdev->dev, &sun8i_dw_hdmi_ops); |
| } |
| |
| static int sun8i_dw_hdmi_remove(struct platform_device *pdev) |
| { |
| component_del(&pdev->dev, &sun8i_dw_hdmi_ops); |
| |
| return 0; |
| } |
| |
| static const struct sun8i_dw_hdmi_quirks sun8i_a83t_quirks = { |
| .mode_valid = sun8i_dw_hdmi_mode_valid_a83t, |
| }; |
| |
| static const struct sun8i_dw_hdmi_quirks sun50i_h6_quirks = { |
| .mode_valid = sun8i_dw_hdmi_mode_valid_h6, |
| .use_drm_infoframe = true, |
| }; |
| |
| static const struct of_device_id sun8i_dw_hdmi_dt_ids[] = { |
| { |
| .compatible = "allwinner,sun8i-a83t-dw-hdmi", |
| .data = &sun8i_a83t_quirks, |
| }, |
| { |
| .compatible = "allwinner,sun50i-h6-dw-hdmi", |
| .data = &sun50i_h6_quirks, |
| }, |
| { /* sentinel */ }, |
| }; |
| MODULE_DEVICE_TABLE(of, sun8i_dw_hdmi_dt_ids); |
| |
| static struct platform_driver sun8i_dw_hdmi_pltfm_driver = { |
| .probe = sun8i_dw_hdmi_probe, |
| .remove = sun8i_dw_hdmi_remove, |
| .driver = { |
| .name = "sun8i-dw-hdmi", |
| .of_match_table = sun8i_dw_hdmi_dt_ids, |
| }, |
| }; |
| |
| static int __init sun8i_dw_hdmi_init(void) |
| { |
| int ret; |
| |
| ret = platform_driver_register(&sun8i_dw_hdmi_pltfm_driver); |
| if (ret) |
| return ret; |
| |
| ret = platform_driver_register(&sun8i_hdmi_phy_driver); |
| if (ret) { |
| platform_driver_unregister(&sun8i_dw_hdmi_pltfm_driver); |
| return ret; |
| } |
| |
| return ret; |
| } |
| |
| static void __exit sun8i_dw_hdmi_exit(void) |
| { |
| platform_driver_unregister(&sun8i_dw_hdmi_pltfm_driver); |
| platform_driver_unregister(&sun8i_hdmi_phy_driver); |
| } |
| |
| module_init(sun8i_dw_hdmi_init); |
| module_exit(sun8i_dw_hdmi_exit); |
| |
| MODULE_AUTHOR("Jernej Skrabec <jernej.skrabec@siol.net>"); |
| MODULE_DESCRIPTION("Allwinner DW HDMI bridge"); |
| MODULE_LICENSE("GPL"); |