drivers/gpu/drm/imx/dw_hdmi-imx.c - arm/linux - Git at Google

 /* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
  *
  * derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/component.h>
 #include <linux/mfd/syscon.h>
 #include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <drm/bridge/dw_hdmi.h>
 #include <video/imx-ipu-v3.h>
 #include <linux/regmap.h>
 #include <drm/drm_of.h>
 #include <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_edid.h>
 #include <drm/drm_encoder_slave.h>

 #include "imx-drm.h"

 struct imx_hdmi {
 	struct device *dev;
 	struct drm_encoder encoder;
 	struct regmap *regmap;
 };

 static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e)
 {
 	return container_of(e, struct imx_hdmi, encoder);
 }

 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 int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
 {
 	struct device_node *np = hdmi->dev->of_node;

 	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);
 	}

 	return 0;
 }

 static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
 {
 }

 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,
 	.disable    = dw_hdmi_imx_encoder_disable,
 	.atomic_check = dw_hdmi_imx_atomic_check,
 };

 static const struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
 	.destroy = drm_encoder_cleanup,
 };

 static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
 						  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 drm_connector *con,
 						   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 platform_device *pdev = to_platform_device(dev);
 	const struct dw_hdmi_plat_data *plat_data;
 	const struct of_device_id *match;
 	struct drm_device *drm = data;
 	struct drm_encoder *encoder;
 	struct imx_hdmi *hdmi;
 	int ret;

 	if (!pdev->dev.of_node)
 		return -ENODEV;

 	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
 	if (!hdmi)
 		return -ENOMEM;

 	match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
 	plat_data = match->data;
 	hdmi->dev = &pdev->dev;
 	encoder = &hdmi->encoder;

 	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
 	/*
 	 * If we failed to find the CRTC(s) which this encoder is
 	 * supposed to be connected to, it's because the CRTC has
 	 * not been registered yet.  Defer probing, and hope that
 	 * the required CRTC is added later.
 	 */
 	if (encoder->possible_crtcs == 0)
 		return -EPROBE_DEFER;

 	ret = dw_hdmi_imx_parse_dt(hdmi);
 	if (ret < 0)
 		return ret;

 	drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
 	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
 			 DRM_MODE_ENCODER_TMDS, NULL);

 	ret = dw_hdmi_bind(pdev, encoder, plat_data);

 	/*
 	 * If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
 	 * which would have called the encoder cleanup.  Do it manually.
 	 */
 	if (ret)
 		drm_encoder_cleanup(encoder);

 	return ret;
 }

 static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
 			       void *data)
 {
 	return dw_hdmi_unbind(dev);
 }

 static const struct component_ops dw_hdmi_imx_ops = {
 	.bind	= dw_hdmi_imx_bind,
 	.unbind	= dw_hdmi_imx_unbind,
 };

 static int dw_hdmi_imx_probe(struct platform_device *pdev)
 {
 	return component_add(&pdev->dev, &dw_hdmi_imx_ops);
 }

 static int dw_hdmi_imx_remove(struct platform_device *pdev)
 {
 	component_del(&pdev->dev, &dw_hdmi_imx_ops);

 	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");
	/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
	*
	* derived from imx-hdmi.c(renamed to bridge/dw_hdmi.c now)
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License version 2 as
	* published by the Free Software Foundation.
	*/
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/component.h>
	#include <linux/mfd/syscon.h>
	#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
	#include <drm/bridge/dw_hdmi.h>
	#include <video/imx-ipu-v3.h>
	#include <linux/regmap.h>
	#include <drm/drm_of.h>
	#include <drm/drmP.h>
	#include <drm/drm_crtc_helper.h>
	#include <drm/drm_edid.h>
	#include <drm/drm_encoder_slave.h>

	#include "imx-drm.h"

	struct imx_hdmi {
	struct device *dev;
	struct drm_encoder encoder;
	struct regmap *regmap;
	};

	static inline struct imx_hdmi enc_to_imx_hdmi(struct drm_encoder e)
	{
	return container_of(e, struct imx_hdmi, encoder);
	}

	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 int dw_hdmi_imx_parse_dt(struct imx_hdmi *hdmi)
	{
	struct device_node *np = hdmi->dev->of_node;

	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);
	}

	return 0;
	}

	static void dw_hdmi_imx_encoder_disable(struct drm_encoder *encoder)
	{
	}

	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,
	.disable = dw_hdmi_imx_encoder_disable,
	.atomic_check = dw_hdmi_imx_atomic_check,
	};

	static const struct drm_encoder_funcs dw_hdmi_imx_encoder_funcs = {
	.destroy = drm_encoder_cleanup,
	};

	static enum drm_mode_status imx6q_hdmi_mode_valid(struct drm_connector *con,
	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 drm_connector *con,
	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 platform_device *pdev = to_platform_device(dev);
	const struct dw_hdmi_plat_data *plat_data;
	const struct of_device_id *match;
	struct drm_device *drm = data;
	struct drm_encoder *encoder;
	struct imx_hdmi *hdmi;
	int ret;

	if (!pdev->dev.of_node)
	return -ENODEV;

	hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
	if (!hdmi)
	return -ENOMEM;

	match = of_match_node(dw_hdmi_imx_dt_ids, pdev->dev.of_node);
	plat_data = match->data;
	hdmi->dev = &pdev->dev;
	encoder = &hdmi->encoder;

	encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
	/*
	* If we failed to find the CRTC(s) which this encoder is
	* supposed to be connected to, it's because the CRTC has
	* not been registered yet. Defer probing, and hope that
	* the required CRTC is added later.
	*/
	if (encoder->possible_crtcs == 0)
	return -EPROBE_DEFER;

	ret = dw_hdmi_imx_parse_dt(hdmi);
	if (ret < 0)
	return ret;

	drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
	drm_encoder_init(drm, encoder, &dw_hdmi_imx_encoder_funcs,
	DRM_MODE_ENCODER_TMDS, NULL);

	ret = dw_hdmi_bind(pdev, encoder, plat_data);

	/*
	* If dw_hdmi_bind() fails we'll never call dw_hdmi_unbind(),
	* which would have called the encoder cleanup. Do it manually.
	*/
	if (ret)
	drm_encoder_cleanup(encoder);

	return ret;
	}

	static void dw_hdmi_imx_unbind(struct device dev, struct device master,
	void *data)
	{
	return dw_hdmi_unbind(dev);
	}

	static const struct component_ops dw_hdmi_imx_ops = {
	.bind = dw_hdmi_imx_bind,
	.unbind = dw_hdmi_imx_unbind,
	};

	static int dw_hdmi_imx_probe(struct platform_device *pdev)
	{
	return component_add(&pdev->dev, &dw_hdmi_imx_ops);
	}

	static int dw_hdmi_imx_remove(struct platform_device *pdev)
	{
	component_del(&pdev->dev, &dw_hdmi_imx_ops);

	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");