diff options
Diffstat (limited to 'drivers/gpu/drm/imx/dw_hdmi-imx.c')
| -rw-r--r-- | drivers/gpu/drm/imx/dw_hdmi-imx.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c new file mode 100644 index 000000000..a2277a0d6 --- /dev/null +++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c @@ -0,0 +1,283 @@ +// 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; + int ret; + + 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"); + dw_hdmi_remove(hdmi->hdmi); + return -ENODEV; + } + + ret = component_add(&pdev->dev, &dw_hdmi_imx_ops); + if (ret) + dw_hdmi_remove(hdmi->hdmi); + + return ret; +} + +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"); |