From: Koji Matsuoka koji.matsuoka.xm@renesas.com
The R-Car Gen3 SoCs include on-chip DesignWare HDMI encoders. Support them with a platform driver to provide platform glue data to the dw-hdmi driver.
The driver is a complete rewrite of code coming from the Renesas BSP, save for the values in the PHY parameters table.
Signed-off-by: Koji Matsuoka koji.matsuoka.xm@renesas.com Signed-off-by: Ulrich Hecht ulrich.hecht+renesas@gmail.com Signed-off-by: Laurent Pinchart laurent.pinchart+renesas@ideasonboard.com Signed-off-by: Kieran Bingham kieran.bingham+renesas@ideasonboard.com --- Changes since v2:
- Replaced the dependency on DRM_RCAR_DU with DRM and made the symbol tristate. --- drivers/gpu/drm/rcar-du/Kconfig | 7 +++ drivers/gpu/drm/rcar-du/Makefile | 1 + drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c | 100 +++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c
diff --git a/drivers/gpu/drm/rcar-du/Kconfig b/drivers/gpu/drm/rcar-du/Kconfig index 06121eeba9e5..8a50dab19e5c 100644 --- a/drivers/gpu/drm/rcar-du/Kconfig +++ b/drivers/gpu/drm/rcar-du/Kconfig @@ -11,6 +11,13 @@ config DRM_RCAR_DU Choose this option if you have an R-Car chipset. If M is selected the module will be called rcar-du-drm.
+config DRM_RCAR_DW_HDMI + tristate "R-Car DU Gen3 HDMI Encoder Support" + depends on DRM && OF + select DRM_DW_HDMI + help + Enable support for R-Car Gen3 internal HDMI encoder. + config DRM_RCAR_LVDS bool "R-Car DU LVDS Encoder Support" depends on DRM_RCAR_DU diff --git a/drivers/gpu/drm/rcar-du/Makefile b/drivers/gpu/drm/rcar-du/Makefile index a492e6858691..2131e722de3b 100644 --- a/drivers/gpu/drm/rcar-du/Makefile +++ b/drivers/gpu/drm/rcar-du/Makefile @@ -11,3 +11,4 @@ rcar-du-drm-$(CONFIG_DRM_RCAR_LVDS) += rcar_du_lvdsenc.o rcar-du-drm-$(CONFIG_DRM_RCAR_VSP) += rcar_du_vsp.o
obj-$(CONFIG_DRM_RCAR_DU) += rcar-du-drm.o +obj-$(CONFIG_DRM_RCAR_DW_HDMI) += rcar_dw_hdmi.o diff --git a/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c new file mode 100644 index 000000000000..7539626b8ebd --- /dev/null +++ b/drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c @@ -0,0 +1,100 @@ +/* + * R-Car Gen3 HDMI PHY + * + * Copyright (C) 2016 Renesas Electronics Corporation + * + * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.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 <linux/module.h> +#include <linux/platform_device.h> + +#include <drm/bridge/dw_hdmi.h> + +#define RCAR_HDMI_PHY_OPMODE_PLLCFG 0x06 /* Mode of operation and PLL dividers */ +#define RCAR_HDMI_PHY_PLLCURRGMPCTRL 0x10 /* PLL current and Gmp (conductance) */ +#define RCAR_HDMI_PHY_PLLDIVCTRL 0x11 /* PLL dividers */ + +struct rcar_hdmi_phy_params { + unsigned long mpixelclock; + u16 opmode_div; /* Mode of operation and PLL dividers */ + u16 curr_gmp; /* PLL current and Gmp (conductance) */ + u16 div; /* PLL dividers */ +}; + +static const struct rcar_hdmi_phy_params rcar_hdmi_phy_params[] = { + { 35500000, 0x0003, 0x0344, 0x0328 }, + { 44900000, 0x0003, 0x0285, 0x0128 }, + { 71000000, 0x0002, 0x1184, 0x0314 }, + { 90000000, 0x0002, 0x1144, 0x0114 }, + { 140250000, 0x0001, 0x20c4, 0x030a }, + { 182750000, 0x0001, 0x2084, 0x010a }, + { 281250000, 0x0000, 0x0084, 0x0305 }, + { 297000000, 0x0000, 0x0084, 0x0105 }, + { ~0UL, 0x0000, 0x0000, 0x0000 }, +}; + +static int rcar_hdmi_phy_configure(struct dw_hdmi *hdmi, + const struct dw_hdmi_plat_data *pdata, + unsigned long mpixelclock) +{ + const struct rcar_hdmi_phy_params *params = rcar_hdmi_phy_params; + + for (; params && params->mpixelclock != ~0UL; ++params) { + if (mpixelclock <= params->mpixelclock) + break; + } + + if (params->mpixelclock == ~0UL) + return -EINVAL; + + dw_hdmi_phy_i2c_write(hdmi, params->opmode_div, + RCAR_HDMI_PHY_OPMODE_PLLCFG); + dw_hdmi_phy_i2c_write(hdmi, params->curr_gmp, + RCAR_HDMI_PHY_PLLCURRGMPCTRL); + dw_hdmi_phy_i2c_write(hdmi, params->div, RCAR_HDMI_PHY_PLLDIVCTRL); + + return 0; +} + +static const struct dw_hdmi_plat_data rcar_dw_hdmi_plat_data = { + .configure_phy = rcar_hdmi_phy_configure, +}; + +static int rcar_dw_hdmi_probe(struct platform_device *pdev) +{ + return dw_hdmi_probe(pdev, &rcar_dw_hdmi_plat_data); +} + +static int rcar_dw_hdmi_remove(struct platform_device *pdev) +{ + dw_hdmi_remove(pdev); + + return 0; +} + +static const struct of_device_id rcar_dw_hdmi_of_table[] = { + { .compatible = "renesas,rcar-gen3-hdmi" }, + { /* Sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, rcar_dw_hdmi_of_table); + +static struct platform_driver rcar_dw_hdmi_platform_driver = { + .probe = rcar_dw_hdmi_probe, + .remove = rcar_dw_hdmi_remove, + .driver = { + .name = "rcar-dw-hdmi", + .of_match_table = rcar_dw_hdmi_of_table, + }, +}; + +module_platform_driver(rcar_dw_hdmi_platform_driver); + +MODULE_AUTHOR("Laurent Pinchart laurent.pinchart@ideasonboard.com"); +MODULE_DESCRIPTION("Renesas R-Car Gen3 HDMI Encoder Driver"); +MODULE_LICENSE("GPL");