From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/gpu/drm/imx/dw_hdmi-imx.c | 284 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 284 insertions(+)
 create mode 100644 drivers/gpu/drm/imx/dw_hdmi-imx.c

(limited to 'drivers/gpu/drm/imx/dw_hdmi-imx.c')

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..a3ecf1069
--- /dev/null
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -0,0 +1,284 @@
+/* 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 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 },
+		},
+	}, {
+		~0UL, {
+			{ 0x00a0, 0x000a },
+			{ 0x2001, 0x000f },
+			{ 0x4002, 0x000f },
+		},
+	}
+};
+
+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 },
+	},
+};
+
+static const struct dw_hdmi_phy_config imx_phy_config[] = {
+	/*pixelclk   symbol   term   vlev */
+	{ 148500000, 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 bool dw_hdmi_imx_encoder_mode_fixup(struct drm_encoder *encoder,
+					   const struct drm_display_mode *mode,
+					   struct drm_display_mode *adj_mode)
+{
+	return true;
+}
+
+static void dw_hdmi_imx_encoder_mode_set(struct drm_encoder *encoder,
+					 struct drm_display_mode *mode,
+					 struct drm_display_mode *adj_mode)
+{
+}
+
+static void dw_hdmi_imx_encoder_commit(struct drm_encoder *encoder)
+{
+	struct imx_hdmi *hdmi = container_of(encoder, struct imx_hdmi, encoder);
+	int mux = imx_drm_encoder_get_mux_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 void dw_hdmi_imx_encoder_prepare(struct drm_encoder *encoder)
+{
+	imx_drm_set_bus_format(encoder, MEDIA_BUS_FMT_RGB888_1X24);
+}
+
+static struct drm_encoder_helper_funcs dw_hdmi_imx_encoder_helper_funcs = {
+	.mode_fixup = dw_hdmi_imx_encoder_mode_fixup,
+	.mode_set   = dw_hdmi_imx_encoder_mode_set,
+	.prepare    = dw_hdmi_imx_encoder_prepare,
+	.commit     = dw_hdmi_imx_encoder_commit,
+	.disable    = dw_hdmi_imx_encoder_disable,
+};
+
+static 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;
+	if (mode->clock > 266000)
+		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;
+	if (mode->clock > 270000)
+		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,
+	.dev_type   = IMX6Q_HDMI,
+	.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,
+	.dev_type = IMX6DL_HDMI,
+	.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;
+	struct resource *iores;
+	int irq;
+	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;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!iores)
+		return -ENXIO;
+
+	platform_set_drvdata(pdev, hdmi);
+
+	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);
+
+	return dw_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
+}
+
+static void dw_hdmi_imx_unbind(struct device *dev, struct device *master,
+			       void *data)
+{
+	return dw_hdmi_unbind(dev, master, data);
+}
+
+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");
-- 
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