From: Paul Boddie paul@boddie.org.uk
A specialisation of the generic Synopsys HDMI driver is employed for JZ4780 HDMI support. This requires a new driver, plus device tree and configuration modifications.
Signed-off-by: Paul Boddie paul@boddie.org.uk Signed-off-by: Ezequiel Garcia ezequiel@collabora.com Signed-off-by: H. Nikolaus Schaller hns@goldelico.com --- drivers/gpu/drm/ingenic/Kconfig | 9 ++ drivers/gpu/drm/ingenic/Makefile | 1 + drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c | 129 ++++++++++++++++++++++ 3 files changed, 139 insertions(+) create mode 100644 drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c
diff --git a/drivers/gpu/drm/ingenic/Kconfig b/drivers/gpu/drm/ingenic/Kconfig index 3b57f8be007c4..4efc709d77b0a 100644 --- a/drivers/gpu/drm/ingenic/Kconfig +++ b/drivers/gpu/drm/ingenic/Kconfig @@ -25,4 +25,13 @@ config DRM_INGENIC_IPU
The Image Processing Unit (IPU) will appear as a second primary plane.
+config DRM_INGENIC_DW_HDMI + tristate "Ingenic specific support for Synopsys DW HDMI" + depends on MACH_JZ4780 + select DRM_DW_HDMI + help + Choose this option to enable Synopsys DesignWare HDMI based driver. + If you want to enable HDMI on Ingenic JZ4780 based SoC, you should + select this option.. + endif diff --git a/drivers/gpu/drm/ingenic/Makefile b/drivers/gpu/drm/ingenic/Makefile index d313326bdddbb..f10cc1c5a5f22 100644 --- a/drivers/gpu/drm/ingenic/Makefile +++ b/drivers/gpu/drm/ingenic/Makefile @@ -1,3 +1,4 @@ obj-$(CONFIG_DRM_INGENIC) += ingenic-drm.o ingenic-drm-y = ingenic-drm-drv.o ingenic-drm-$(CONFIG_DRM_INGENIC_IPU) += ingenic-ipu.o +obj-$(CONFIG_DRM_INGENIC_DW_HDMI) += ingenic-dw-hdmi.o diff --git a/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c new file mode 100644 index 0000000000000..c14890d6b9826 --- /dev/null +++ b/drivers/gpu/drm/ingenic/ingenic-dw-hdmi.c @@ -0,0 +1,129 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. + * Copyright (C) 2019, 2020 Paul Boddie paul@boddie.org.uk + * + * Derived from dw_hdmi-imx.c with i.MX portions removed. + * Probe and remove operations derived from rcar_dw_hdmi.c. + */ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#include <drm/bridge/dw_hdmi.h> +#include <drm/drm_of.h> +#include <drm/drm_print.h> + +static const struct dw_hdmi_mpll_config ingenic_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 ingenic_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 ingenic_phy_config[] = { + /*pixelclk symbol term vlev */ + { 216000000, 0x800d, 0x0005, 0x01ad}, + { ~0UL, 0x0000, 0x0000, 0x0000} +}; + +static enum drm_mode_status +ingenic_dw_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 ingenic_dw_hdmi_plat_data = { + .mpll_cfg = ingenic_mpll_cfg, + .cur_ctr = ingenic_cur_ctr, + .phy_config = ingenic_phy_config, + .mode_valid = ingenic_dw_hdmi_mode_valid, + .output_port = 1, +}; + +static const struct of_device_id ingenic_dw_hdmi_dt_ids[] = { + { .compatible = "ingenic,jz4780-dw-hdmi" }, + { /* Sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ingenic_dw_hdmi_dt_ids); + +static int ingenic_dw_hdmi_probe(struct platform_device *pdev) +{ + struct dw_hdmi *hdmi; + struct regulator *regulator; + int ret; + + hdmi = dw_hdmi_probe(pdev, &ingenic_dw_hdmi_plat_data); + if (IS_ERR(hdmi)) + return PTR_ERR(hdmi); + + platform_set_drvdata(pdev, hdmi); + + regulator = devm_regulator_get_optional(&pdev->dev, "hdmi-5v"); + + if (IS_ERR(regulator)) { + ret = PTR_ERR(regulator); + + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %s (%d)\n", + "hdmi-5v", ret); + return ret; + } + + ret = regulator_enable(regulator); + if (ret) { + DRM_DEV_ERROR(&pdev->dev, "Failed to enable hpd regulator: %d\n", + ret); + return ret; + } + + return 0; +} + +static int ingenic_dw_hdmi_remove(struct platform_device *pdev) +{ + struct dw_hdmi *hdmi = platform_get_drvdata(pdev); + + dw_hdmi_remove(hdmi); + + return 0; +} + +static struct platform_driver ingenic_dw_hdmi_driver = { + .probe = ingenic_dw_hdmi_probe, + .remove = ingenic_dw_hdmi_remove, + .driver = { + .name = "dw-hdmi-ingenic", + .of_match_table = ingenic_dw_hdmi_dt_ids, + }, +}; + +module_platform_driver(ingenic_dw_hdmi_driver); + +MODULE_DESCRIPTION("JZ4780 Specific DW-HDMI Driver Extension"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:dwhdmi-ingenic");