/* Copyright (C) 2011-2013 Freescale Semiconductor, Inc.
*
* derived from imx-hdmi.c
*
* 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 <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"
#include "imx-hdmi.h"
struct imx_hdmi_priv {
struct device *dev;
struct drm_encoder encoder;
struct regmap *regmap;
};
static int imx_hdmi_parse_dt(struct imx_hdmi_priv *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 imx_hdmi_encoder_disable(struct drm_encoder *encoder)
{
}
static bool imx_hdmi_encoder_mode_fixup(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adj_mode)
{
return true;
}
static void imx_hdmi_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adj_mode)
{
}
static void imx_hdmi_encoder_commit(struct drm_encoder *encoder)
{
struct imx_hdmi_priv *hdmi = container_of(encoder,
struct imx_hdmi_priv,
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 imx_hdmi_encoder_prepare(struct drm_encoder *encoder)
{
imx_drm_panel_format(encoder, V4L2_PIX_FMT_RGB24);
}
static struct drm_encoder_helper_funcs imx_hdmi_encoder_helper_funcs = {
.mode_fixup = imx_hdmi_encoder_mode_fixup,
.mode_set = imx_hdmi_encoder_mode_set,
.prepare = imx_hdmi_encoder_prepare,
.commit = imx_hdmi_encoder_commit,
.disable = imx_hdmi_encoder_disable,
};
static struct drm_encoder_funcs imx_hdmi_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static struct imx_hdmi_plat_data imx6q_hdmi_drv_data = {
.dev_type = IMX6Q_HDMI,
};
static struct imx_hdmi_plat_data imx6dl_hdmi_drv_data = {
.dev_type = IMX6DL_HDMI,
};
static const struct of_device_id imx_hdmi_dt_ids[] = {
{ .compatible = "fsl,imx6q-hdmi",
.data = &imx6q_hdmi_drv_data
}, {
.compatible = "fsl,imx6dl-hdmi",
.data = &imx6dl_hdmi_drv_data
},
{},
};
MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids);
static int imx_hdmi_pltfm_bind(struct device *dev, struct device *master,
void *data)
{
struct platform_device *pdev = to_platform_device(dev);
const struct imx_hdmi_plat_data *plat_data;
const struct of_device_id *match;
struct drm_device *drm = data;
struct drm_encoder *encoder;
struct imx_hdmi_priv *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(imx_hdmi_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 = imx_hdmi_parse_dt(hdmi);
if (ret < 0)
return ret;
drm_encoder_helper_add(encoder, &imx_hdmi_encoder_helper_funcs);
drm_encoder_init(drm, encoder, &imx_hdmi_encoder_funcs,
DRM_MODE_ENCODER_TMDS);
return imx_hdmi_bind(dev, master, data, encoder, iores, irq, plat_data);
}
static void imx_hdmi_pltfm_unbind(struct device *dev, struct device *master,
void *data)
{
return imx_hdmi_unbind(dev, master, data);
}
static const struct component_ops imx_hdmi_ops = {
.bind = imx_hdmi_pltfm_bind,
.unbind = imx_hdmi_pltfm_unbind,
};
static int imx_hdmi_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &imx_hdmi_ops);
}
static int imx_hdmi_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &imx_hdmi_ops);
return 0;
}
static struct platform_driver imx_hdmi_pltfm_driver = {
.probe = imx_hdmi_probe,
.remove = imx_hdmi_remove,
.driver = {
.name = "hdmi-imx",
.of_match_table = imx_hdmi_dt_ids,
},
};
module_platform_driver(imx_hdmi_pltfm_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:hdmi-imx");
