| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. |
| * |
| * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now) |
| */ |
| |
| #include <linux/component.h> |
| #include <linux/mfd/syscon.h> |
| #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| |
| #include <video/imx-ipu-v3.h> |
| |
| #include <drm/bridge/dw_hdmi.h> |
| #include <drm/drm_atomic_helper.h> |
| #include <drm/drm_bridge.h> |
| #include <drm/drm_edid.h> |
| #include <drm/drm_encoder.h> |
| #include <drm/drm_managed.h> |
| #include <drm/drm_of.h> |
| #include <drm/drm_simple_kms_helper.h> |
| |
| #include "imx-drm.h" |
| |
| struct imx_hdmi; |
| |
| struct imx_hdmi_encoder { |
| struct drm_encoder encoder; |
| struct imx_hdmi *hdmi; |
| }; |
| |
| struct imx_hdmi { |
| struct device *dev; |
| struct drm_bridge *bridge; |
| struct dw_hdmi *hdmi; |
| struct regmap *regmap; |
| }; |
| |
| static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e) |
| { |
| return container_of(e, struct imx_hdmi_encoder, encoder)->hdmi; |
| } |
| |
| static const struct dw_hdmi_mpll_config imx_mpll_cfg[] = { |
| { |
| 45250000, { |
| { 0x01e0, 0x0000 }, |
| { 0x21e1, 0x0000 }, |
| { 0x41e2, 0x0000 } |
| }, |
| }, { |
| 92500000, { |
| { 0x0140, 0x0005 }, |
| { 0x2141, 0x0005 }, |
| { 0x4142, 0x0005 }, |
| }, |
| }, { |
| 148500000, { |
| { 0x00a0, 0x000a }, |
| { 0x20a1, 0x000a }, |
| { 0x40a2, 0x000a }, |
| }, |
| }, { |
| 216000000, { |
| { 0x00a0, 0x000a }, |
| { 0x2001, 0x000f }, |
| { 0x4002, 0x000f }, |
| }, |
| }, { |
| ~0UL, { |
| { 0x0000, 0x0000 }, |
| { 0x0000, 0x0000 }, |
| { 0x0000, 0x0000 }, |
| }, |
| } |
| }; |
| |
| static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = { |
| /* pixelclk bpp8 bpp10 bpp12 */ |
| { |
| 54000000, { 0x091c, 0x091c, 0x06dc }, |
| }, { |
| 58400000, { 0x091c, 0x06dc, 0x06dc }, |
| }, { |
| 72000000, { 0x06dc, 0x06dc, 0x091c }, |
| }, { |
| 74250000, { 0x06dc, 0x0b5c, 0x091c }, |
| }, { |
| 118800000, { 0x091c, 0x091c, 0x06dc }, |
| }, { |
| 216000000, { 0x06dc, 0x0b5c, 0x091c }, |
| }, { |
| ~0UL, { 0x0000, 0x0000, 0x0000 }, |
| }, |
| }; |
| |
| /* |
| * Resistance term 133Ohm Cfg |
| * PREEMP config 0.00 |
| * TX/CK level 10 |
| */ |
| static const struct dw_hdmi_phy_config imx_phy_config[] = { |
| /*pixelclk symbol term vlev */ |
| { 216000000, 0x800d, 0x0005, 0x01ad}, |
| { ~0UL, 0x0000, 0x0000, 0x0000} |
| }; |
| |
| static void dw_hdmi_imx_encoder_enable(struct drm_encoder *encoder) |
| { |
| struct imx_hdmi *hdmi = enc_to_imx_hdmi(encoder); |
| int mux = drm_of_encoder_active_port_id(hdmi->dev->of_node, encoder); |
| |
| regmap_update_bits(hdmi->regmap, IOMUXC_GPR3, |
| IMX6Q_GPR3_HDMI_MUX_CTL_MASK, |
| mux << IMX6Q_GPR3_HDMI_MUX_CTL_SHIFT); |
| } |
| |
| static int dw_hdmi_imx_atomic_check(struct drm_encoder *encoder, |
| struct drm_crtc_state *crtc_state, |
| struct drm_connector_state *conn_state) |
| { |
| struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc_state); |
| |
| imx_crtc_state->bus_format = MEDIA_BUS_FMT_RGB888_1X24; |
| imx_crtc_state->di_hsync_pin = 2; |
| imx_crtc_state->di_vsync_pin = 3; |
| |
| return 0; |
| } |
| |
| static const struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = { |
| .enable = dw_hdmi_imx_encoder_enable, |
| .atomic_check = dw_hdmi_imx_atomic_check, |
| }; |
| |
| static enum drm_mode_status |
| imx6q_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, |
| const struct drm_display_info *info, |
| const struct drm_display_mode *mode) |
| { |
| if (mode->clock < 13500) |
| return MODE_CLOCK_LOW; |
| /* FIXME: Hardware is capable of 266MHz, but setup data is missing. */ |
| if (mode->clock > 216000) |
| return MODE_CLOCK_HIGH; |
| |
| return MODE_OK; |
| } |
| |
| static enum drm_mode_status |
| imx6dl_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data, |
| const struct drm_display_info *info, |
| const struct drm_display_mode *mode) |
| { |
| if (mode->clock < 13500) |
| return MODE_CLOCK_LOW; |
| /* FIXME: Hardware is capable of 270MHz, but setup data is missing. */ |
| if (mode->clock > 216000) |
| return MODE_CLOCK_HIGH; |
| |
| return MODE_OK; |
| } |
| |
| static struct dw_hdmi_plat_data imx6q_hdmi_drv_data = { |
| .mpll_cfg = imx_mpll_cfg, |
| .cur_ctr = imx_cur_ctr, |
| .phy_config = imx_phy_config, |
| .mode_valid = imx6q_hdmi_mode_valid, |
| }; |
| |
| static struct dw_hdmi_plat_data imx6dl_hdmi_drv_data = { |
| .mpll_cfg = imx_mpll_cfg, |
| .cur_ctr = imx_cur_ctr, |
| .phy_config = imx_phy_config, |
| .mode_valid = imx6dl_hdmi_mode_valid, |
| }; |
| |
| static const struct of_device_id dw_hdmi_imx_dt_ids[] = { |
| { .compatible = "fsl,imx6q-hdmi", |
| .data = &imx6q_hdmi_drv_data |
| }, { |
| .compatible = "fsl,imx6dl-hdmi", |
| .data = &imx6dl_hdmi_drv_data |
| }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, dw_hdmi_imx_dt_ids); |
| |
| static int dw_hdmi_imx_bind(struct device *dev, struct device *master, |
| void *data) |
| { |
| struct drm_device *drm = data; |
| struct imx_hdmi_encoder *hdmi_encoder; |
| struct drm_encoder *encoder; |
| int ret; |
| |
| hdmi_encoder = drmm_simple_encoder_alloc(drm, struct imx_hdmi_encoder, |
| encoder, DRM_MODE_ENCODER_TMDS); |
| if (IS_ERR(hdmi_encoder)) |
| return PTR_ERR(hdmi_encoder); |
| |
| hdmi_encoder->hdmi = dev_get_drvdata(dev); |
| encoder = &hdmi_encoder->encoder; |
| |
| ret = imx_drm_encoder_parse_of(drm, encoder, dev->of_node); |
| if (ret) |
| return ret; |
| |
| drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs); |
| |
| return drm_bridge_attach(encoder, hdmi_encoder->hdmi->bridge, NULL, 0); |
| } |
| |
| static const struct component_ops dw_hdmi_imx_ops = { |
| .bind = dw_hdmi_imx_bind, |
| }; |
| |
| static int dw_hdmi_imx_probe(struct platform_device *pdev) |
| { |
| struct device_node *np = pdev->dev.of_node; |
| const struct of_device_id *match = of_match_node(dw_hdmi_imx_dt_ids, np); |
| struct imx_hdmi *hdmi; |
| |
| hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); |
| if (!hdmi) |
| return -ENOMEM; |
| |
| platform_set_drvdata(pdev, hdmi); |
| hdmi->dev = &pdev->dev; |
| |
| hdmi->regmap = syscon_regmap_lookup_by_phandle(np, "gpr"); |
| if (IS_ERR(hdmi->regmap)) { |
| dev_err(hdmi->dev, "Unable to get gpr\n"); |
| return PTR_ERR(hdmi->regmap); |
| } |
| |
| hdmi->hdmi = dw_hdmi_probe(pdev, match->data); |
| if (IS_ERR(hdmi->hdmi)) |
| return PTR_ERR(hdmi->hdmi); |
| |
| hdmi->bridge = of_drm_find_bridge(np); |
| if (!hdmi->bridge) { |
| dev_err(hdmi->dev, "Unable to find bridge\n"); |
| return -ENODEV; |
| } |
| |
| return component_add(&pdev->dev, &dw_hdmi_imx_ops); |
| } |
| |
| static int dw_hdmi_imx_remove(struct platform_device *pdev) |
| { |
| struct imx_hdmi *hdmi = platform_get_drvdata(pdev); |
| |
| component_del(&pdev->dev, &dw_hdmi_imx_ops); |
| dw_hdmi_remove(hdmi->hdmi); |
| |
| return 0; |
| } |
| |
| static struct platform_driver dw_hdmi_imx_platform_driver = { |
| .probe = dw_hdmi_imx_probe, |
| .remove = dw_hdmi_imx_remove, |
| .driver = { |
| .name = "dwhdmi-imx", |
| .of_match_table = dw_hdmi_imx_dt_ids, |
| }, |
| }; |
| |
| module_platform_driver(dw_hdmi_imx_platform_driver); |
| |
| MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com>"); |
| MODULE_AUTHOR("Yakir Yang <ykk@rock-chips.com>"); |
| MODULE_DESCRIPTION("IMX6 Specific DW-HDMI Driver Extension"); |
| MODULE_LICENSE("GPL"); |
| MODULE_ALIAS("platform:dwhdmi-imx"); |
