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Commit 40d0fa70 authored by Koji Matsuoka's avatar Koji Matsuoka Committed by Laurent Pinchart
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drm: rcar-du: Add Gen3 HDMI encoder support 



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: default avatarKoji Matsuoka <koji.matsuoka.xm@renesas.com>
Signed-off-by: default avatarUlrich Hecht <ulrich.hecht+renesas@gmail.com>
Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarKieran Bingham <kieran.bingham+renesas@ideasonboard.com>
parent 907c1bbd

drivers/gpu/drm/rcar-du/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/rcar-du/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/gpu/drm/rcar-du/rcar_dw_hdmi.c

0 → 100644
+100 −0
Original line number Diff line number Diff line 
/*

 * 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");