#include <linux/component.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <video/imx-ipu-v3.h>
#include <drm/bridge/dw_hdmi.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder.h>
#include <drm/drm_managed.h>
#include <drm/drm_of.h>
#include <drm/drm_simple_kms_helper.h>
#include "imx-drm.h"
struct imx_hdmi;
struct imx_hdmi_encoder {
struct drm_encoder encoder;
struct imx_hdmi *hdmi;
};
struct imx_hdmi {
struct device *dev;
struct drm_bridge *bridge;
struct dw_hdmi *hdmi;
struct regmap *regmap;
};
static inline struct imx_hdmi *enc_to_imx_hdmi(struct drm_encoder *e)
{
return container_of(e, struct imx_hdmi_encoder, encoder)->hdmi;
}
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[] = {
{
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[] = {
{ 216000000, 0x800d, 0x0005, 0x01ad},
{ ~0UL, 0x0000, 0x0000, 0x0000}
};
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,
.atomic_check = dw_hdmi_imx_atomic_check,
};
static enum drm_mode_status
imx6q_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
if (mode->clock < 13500)
return MODE_CLOCK_LOW;
if (mode->clock > 216000)
return MODE_CLOCK_HIGH;
return MODE_OK;
}
static enum drm_mode_status
imx6dl_hdmi_mode_valid(struct dw_hdmi *hdmi, void *data,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
if (mode->clock < 13500)
return MODE_CLOCK_LOW;
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 drm_device *drm = data;
struct imx_hdmi_encoder *hdmi_encoder;
struct drm_encoder *encoder;
int ret;
hdmi_encoder = drmm_simple_encoder_alloc(drm, struct imx_hdmi_encoder,
encoder, DRM_MODE_ENCODER_TMDS);
if (IS_ERR(hdmi_encoder))
return PTR_ERR(hdmi_encoder);
hdmi_encoder->hdmi = dev_get_drvdata(dev);
encoder = &hdmi_encoder->encoder;
ret = imx_drm_encoder_parse_of(drm, encoder, dev->of_node);
if (ret)
return ret;
drm_encoder_helper_add(encoder, &dw_hdmi_imx_encoder_helper_funcs);
return drm_bridge_attach(encoder, hdmi_encoder->hdmi->bridge, NULL, 0);
}
static const struct component_ops dw_hdmi_imx_ops = {
.bind = dw_hdmi_imx_bind,
};
static int dw_hdmi_imx_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *match = of_match_node(dw_hdmi_imx_dt_ids, np);
struct imx_hdmi *hdmi;
int ret;
hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);
if (!hdmi)
return -ENOMEM;
platform_set_drvdata(pdev, hdmi);
hdmi->dev = &pdev->dev;
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);
}
hdmi->hdmi = dw_hdmi_probe(pdev, match->data);
if (IS_ERR(hdmi->hdmi))
return PTR_ERR(hdmi->hdmi);
hdmi->bridge = of_drm_find_and_get_bridge(np);
if (!hdmi->bridge) {
dev_err(hdmi->dev, "Unable to find bridge\n");
dw_hdmi_remove(hdmi->hdmi);
return -ENODEV;
}
ret = component_add(&pdev->dev, &dw_hdmi_imx_ops);
if (ret) {
drm_bridge_put(hdmi->bridge);
dw_hdmi_remove(hdmi->hdmi);
}
return ret;
}
static void dw_hdmi_imx_remove(struct platform_device *pdev)
{
struct imx_hdmi *hdmi = platform_get_drvdata(pdev);
component_del(&pdev->dev, &dw_hdmi_imx_ops);
drm_bridge_put(hdmi->bridge);
dw_hdmi_remove(hdmi->hdmi);
}
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");
