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OpenCloudOS-Kernel/drivers/gpu/drm/rockchip/rockchip_lvds.c

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/*
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
* Author:
* Mark Yao <mark.yao@rock-chips.com>
* Sandy Huang <hjc@rock-chips.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_panel.h>
#include <drm/drm_of.h>
#include <linux/component.h>
#include <linux/clk.h>
#include <linux/mfd/syscon.h>
#include <linux/of_graph.h>
#include <linux/pinctrl/devinfo.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include "rockchip_drm_drv.h"
#include "rockchip_drm_vop.h"
#include "rockchip_lvds.h"
#define DISPLAY_OUTPUT_RGB 0
#define DISPLAY_OUTPUT_LVDS 1
#define DISPLAY_OUTPUT_DUAL_LVDS 2
#define connector_to_lvds(c) \
container_of(c, struct rockchip_lvds, connector)
#define encoder_to_lvds(c) \
container_of(c, struct rockchip_lvds, encoder)
/**
* rockchip_lvds_soc_data - rockchip lvds Soc private data
* @ch1_offset: lvds channel 1 registe offset
* grf_soc_con6: general registe offset for LVDS contrl
* grf_soc_con7: general registe offset for LVDS contrl
* has_vop_sel: to indicate whether need to choose from different VOP.
*/
struct rockchip_lvds_soc_data {
u32 ch1_offset;
int grf_soc_con6;
int grf_soc_con7;
bool has_vop_sel;
};
struct rockchip_lvds {
struct device *dev;
void __iomem *regs;
struct regmap *grf;
struct clk *pclk;
const struct rockchip_lvds_soc_data *soc_data;
int output; /* rgb lvds or dual lvds output */
int format; /* vesa or jeida format */
struct drm_device *drm_dev;
struct drm_panel *panel;
struct drm_bridge *bridge;
struct drm_connector connector;
struct drm_encoder encoder;
struct dev_pin_info *pins;
};
static inline void lvds_writel(struct rockchip_lvds *lvds, u32 offset, u32 val)
{
writel_relaxed(val, lvds->regs + offset);
if (lvds->output == DISPLAY_OUTPUT_LVDS)
return;
writel_relaxed(val, lvds->regs + offset + lvds->soc_data->ch1_offset);
}
static inline int lvds_name_to_format(const char *s)
{
if (strncmp(s, "jeida-18", 8) == 0)
return LVDS_JEIDA_18;
else if (strncmp(s, "jeida-24", 8) == 0)
return LVDS_JEIDA_24;
else if (strncmp(s, "vesa-24", 7) == 0)
return LVDS_VESA_24;
return -EINVAL;
}
static inline int lvds_name_to_output(const char *s)
{
if (strncmp(s, "rgb", 3) == 0)
return DISPLAY_OUTPUT_RGB;
else if (strncmp(s, "lvds", 4) == 0)
return DISPLAY_OUTPUT_LVDS;
else if (strncmp(s, "duallvds", 8) == 0)
return DISPLAY_OUTPUT_DUAL_LVDS;
return -EINVAL;
}
static int rockchip_lvds_poweron(struct rockchip_lvds *lvds)
{
int ret;
u32 val;
ret = clk_enable(lvds->pclk);
if (ret < 0) {
DRM_DEV_ERROR(lvds->dev, "failed to enable lvds pclk %d\n", ret);
return ret;
}
ret = pm_runtime_get_sync(lvds->dev);
if (ret < 0) {
DRM_DEV_ERROR(lvds->dev, "failed to get pm runtime: %d\n", ret);
clk_disable(lvds->pclk);
return ret;
}
val = RK3288_LVDS_CH0_REG0_LANE4_EN | RK3288_LVDS_CH0_REG0_LANE3_EN |
RK3288_LVDS_CH0_REG0_LANE2_EN | RK3288_LVDS_CH0_REG0_LANE1_EN |
RK3288_LVDS_CH0_REG0_LANE0_EN;
if (lvds->output == DISPLAY_OUTPUT_RGB) {
val |= RK3288_LVDS_CH0_REG0_TTL_EN |
RK3288_LVDS_CH0_REG0_LANECK_EN;
lvds_writel(lvds, RK3288_LVDS_CH0_REG0, val);
lvds_writel(lvds, RK3288_LVDS_CH0_REG2,
RK3288_LVDS_PLL_FBDIV_REG2(0x46));
lvds_writel(lvds, RK3288_LVDS_CH0_REG4,
RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
lvds_writel(lvds, RK3288_LVDS_CH0_REG5,
RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
} else {
val |= RK3288_LVDS_CH0_REG0_LVDS_EN |
RK3288_LVDS_CH0_REG0_LANECK_EN;
lvds_writel(lvds, RK3288_LVDS_CH0_REG0, val);
lvds_writel(lvds, RK3288_LVDS_CH0_REG1,
RK3288_LVDS_CH0_REG1_LANECK_BIAS |
RK3288_LVDS_CH0_REG1_LANE4_BIAS |
RK3288_LVDS_CH0_REG1_LANE3_BIAS |
RK3288_LVDS_CH0_REG1_LANE2_BIAS |
RK3288_LVDS_CH0_REG1_LANE1_BIAS |
RK3288_LVDS_CH0_REG1_LANE0_BIAS);
lvds_writel(lvds, RK3288_LVDS_CH0_REG2,
RK3288_LVDS_CH0_REG2_RESERVE_ON |
RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
RK3288_LVDS_PLL_FBDIV_REG2(0x46));
lvds_writel(lvds, RK3288_LVDS_CH0_REG4, 0x00);
lvds_writel(lvds, RK3288_LVDS_CH0_REG5, 0x00);
}
lvds_writel(lvds, RK3288_LVDS_CH0_REG3, RK3288_LVDS_PLL_FBDIV_REG3(0x46));
lvds_writel(lvds, RK3288_LVDS_CH0_REGD, RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
lvds_writel(lvds, RK3288_LVDS_CH0_REG20, RK3288_LVDS_CH0_REG20_LSB);
lvds_writel(lvds, RK3288_LVDS_CFG_REGC, RK3288_LVDS_CFG_REGC_PLL_ENABLE);
lvds_writel(lvds, RK3288_LVDS_CFG_REG21, RK3288_LVDS_CFG_REG21_TX_ENABLE);
return 0;
}
static void rockchip_lvds_poweroff(struct rockchip_lvds *lvds)
{
int ret;
u32 val;
lvds_writel(lvds, RK3288_LVDS_CFG_REG21, RK3288_LVDS_CFG_REG21_TX_ENABLE);
lvds_writel(lvds, RK3288_LVDS_CFG_REGC, RK3288_LVDS_CFG_REGC_PLL_ENABLE);
val = LVDS_DUAL | LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN | LVDS_PWRDN;
val |= val << 16;
ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con7, val);
if (ret != 0)
DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
pm_runtime_put(lvds->dev);
clk_disable(lvds->pclk);
}
static const struct drm_connector_funcs rockchip_lvds_connector_funcs = {
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = drm_connector_cleanup,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int rockchip_lvds_connector_get_modes(struct drm_connector *connector)
{
struct rockchip_lvds *lvds = connector_to_lvds(connector);
struct drm_panel *panel = lvds->panel;
return drm_panel_get_modes(panel);
}
static const
struct drm_connector_helper_funcs rockchip_lvds_connector_helper_funcs = {
.get_modes = rockchip_lvds_connector_get_modes,
};
static void rockchip_lvds_grf_config(struct drm_encoder *encoder,
struct drm_display_mode *mode)
{
struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
u8 pin_hsync = (mode->flags & DRM_MODE_FLAG_PHSYNC) ? 1 : 0;
u8 pin_dclk = (mode->flags & DRM_MODE_FLAG_PCSYNC) ? 1 : 0;
u32 val;
int ret;
/* iomux to LCD data/sync mode */
if (lvds->output == DISPLAY_OUTPUT_RGB)
if (lvds->pins && !IS_ERR(lvds->pins->default_state))
pinctrl_select_state(lvds->pins->p,
lvds->pins->default_state);
val = lvds->format | LVDS_CH0_EN;
if (lvds->output == DISPLAY_OUTPUT_RGB)
val |= LVDS_TTL_EN | LVDS_CH1_EN;
else if (lvds->output == DISPLAY_OUTPUT_DUAL_LVDS)
val |= LVDS_DUAL | LVDS_CH1_EN;
if ((mode->htotal - mode->hsync_start) & 0x01)
val |= LVDS_START_PHASE_RST_1;
val |= (pin_dclk << 8) | (pin_hsync << 9);
val |= (0xffff << 16);
ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con7, val);
if (ret != 0) {
DRM_DEV_ERROR(lvds->dev, "Could not write to GRF: %d\n", ret);
return;
}
}
static int rockchip_lvds_set_vop_source(struct rockchip_lvds *lvds,
struct drm_encoder *encoder)
{
u32 val;
int ret;
if (!lvds->soc_data->has_vop_sel)
return 0;
ret = drm_of_encoder_active_endpoint_id(lvds->dev->of_node, encoder);
if (ret < 0)
return ret;
val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
if (ret)
val |= RK3288_LVDS_SOC_CON6_SEL_VOP_LIT;
ret = regmap_write(lvds->grf, lvds->soc_data->grf_soc_con6, val);
if (ret < 0)
return ret;
return 0;
}
static int
rockchip_lvds_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
s->output_mode = ROCKCHIP_OUT_MODE_P888;
s->output_type = DRM_MODE_CONNECTOR_LVDS;
return 0;
}
static void rockchip_lvds_encoder_enable(struct drm_encoder *encoder)
{
struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
int ret;
drm_panel_prepare(lvds->panel);
ret = rockchip_lvds_poweron(lvds);
if (ret < 0) {
DRM_DEV_ERROR(lvds->dev, "failed to power on lvds: %d\n", ret);
drm_panel_unprepare(lvds->panel);
}
rockchip_lvds_grf_config(encoder, mode);
rockchip_lvds_set_vop_source(lvds, encoder);
drm_panel_enable(lvds->panel);
}
static void rockchip_lvds_encoder_disable(struct drm_encoder *encoder)
{
struct rockchip_lvds *lvds = encoder_to_lvds(encoder);
drm_panel_disable(lvds->panel);
rockchip_lvds_poweroff(lvds);
drm_panel_unprepare(lvds->panel);
}
static const
struct drm_encoder_helper_funcs rockchip_lvds_encoder_helper_funcs = {
.enable = rockchip_lvds_encoder_enable,
.disable = rockchip_lvds_encoder_disable,
.atomic_check = rockchip_lvds_encoder_atomic_check,
};
static const struct drm_encoder_funcs rockchip_lvds_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static const struct rockchip_lvds_soc_data rk3288_lvds_data = {
.ch1_offset = 0x100,
.grf_soc_con6 = 0x025c,
.grf_soc_con7 = 0x0260,
.has_vop_sel = true,
};
static const struct of_device_id rockchip_lvds_dt_ids[] = {
{
.compatible = "rockchip,rk3288-lvds",
.data = &rk3288_lvds_data
},
{}
};
MODULE_DEVICE_TABLE(of, rockchip_lvds_dt_ids);
static int rockchip_lvds_bind(struct device *dev, struct device *master,
void *data)
{
struct rockchip_lvds *lvds = dev_get_drvdata(dev);
struct drm_device *drm_dev = data;
struct drm_encoder *encoder;
struct drm_connector *connector;
struct device_node *remote = NULL;
struct device_node *port, *endpoint;
int ret = 0, child_count = 0;
const char *name;
u32 endpoint_id;
lvds->drm_dev = drm_dev;
port = of_graph_get_port_by_id(dev->of_node, 1);
if (!port) {
DRM_DEV_ERROR(dev,
"can't found port point, please init lvds panel port!\n");
return -EINVAL;
}
for_each_child_of_node(port, endpoint) {
child_count++;
of_property_read_u32(endpoint, "reg", &endpoint_id);
ret = drm_of_find_panel_or_bridge(dev->of_node, 1, endpoint_id,
&lvds->panel, &lvds->bridge);
if (!ret)
break;
}
if (!child_count) {
DRM_DEV_ERROR(dev, "lvds port does not have any children\n");
ret = -EINVAL;
goto err_put_port;
} else if (ret) {
DRM_DEV_ERROR(dev, "failed to find panel and bridge node\n");
ret = -EPROBE_DEFER;
goto err_put_port;
}
if (lvds->panel)
remote = lvds->panel->dev->of_node;
else
remote = lvds->bridge->of_node;
if (of_property_read_string(dev->of_node, "rockchip,output", &name))
/* default set it as output rgb */
lvds->output = DISPLAY_OUTPUT_RGB;
else
lvds->output = lvds_name_to_output(name);
if (lvds->output < 0) {
DRM_DEV_ERROR(dev, "invalid output type [%s]\n", name);
ret = lvds->output;
goto err_put_remote;
}
if (of_property_read_string(remote, "data-mapping", &name))
/* default set it as format vesa 18 */
lvds->format = LVDS_VESA_18;
else
lvds->format = lvds_name_to_format(name);
if (lvds->format < 0) {
DRM_DEV_ERROR(dev, "invalid data-mapping format [%s]\n", name);
ret = lvds->format;
goto err_put_remote;
}
encoder = &lvds->encoder;
encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
dev->of_node);
ret = drm_encoder_init(drm_dev, encoder, &rockchip_lvds_encoder_funcs,
DRM_MODE_ENCODER_LVDS, NULL);
if (ret < 0) {
DRM_DEV_ERROR(drm_dev->dev,
"failed to initialize encoder: %d\n", ret);
goto err_put_remote;
}
drm_encoder_helper_add(encoder, &rockchip_lvds_encoder_helper_funcs);
if (lvds->panel) {
connector = &lvds->connector;
connector->dpms = DRM_MODE_DPMS_OFF;
ret = drm_connector_init(drm_dev, connector,
&rockchip_lvds_connector_funcs,
DRM_MODE_CONNECTOR_LVDS);
if (ret < 0) {
DRM_DEV_ERROR(drm_dev->dev,
"failed to initialize connector: %d\n", ret);
goto err_free_encoder;
}
drm_connector_helper_add(connector,
&rockchip_lvds_connector_helper_funcs);
ret = drm_mode_connector_attach_encoder(connector, encoder);
if (ret < 0) {
DRM_DEV_ERROR(drm_dev->dev,
"failed to attach encoder: %d\n", ret);
goto err_free_connector;
}
ret = drm_panel_attach(lvds->panel, connector);
if (ret < 0) {
DRM_DEV_ERROR(drm_dev->dev,
"failed to attach panel: %d\n", ret);
goto err_free_connector;
}
} else {
lvds->bridge->encoder = encoder;
ret = drm_bridge_attach(encoder, lvds->bridge, NULL);
if (ret) {
DRM_DEV_ERROR(drm_dev->dev,
"failed to attach bridge: %d\n", ret);
goto err_free_encoder;
}
encoder->bridge = lvds->bridge;
}
pm_runtime_enable(dev);
of_node_put(remote);
of_node_put(port);
return 0;
err_free_connector:
drm_connector_cleanup(connector);
err_free_encoder:
drm_encoder_cleanup(encoder);
err_put_remote:
of_node_put(remote);
err_put_port:
of_node_put(port);
return ret;
}
static void rockchip_lvds_unbind(struct device *dev, struct device *master,
void *data)
{
struct rockchip_lvds *lvds = dev_get_drvdata(dev);
rockchip_lvds_encoder_disable(&lvds->encoder);
if (lvds->panel)
drm_panel_detach(lvds->panel);
pm_runtime_disable(dev);
drm_connector_cleanup(&lvds->connector);
drm_encoder_cleanup(&lvds->encoder);
}
static const struct component_ops rockchip_lvds_component_ops = {
.bind = rockchip_lvds_bind,
.unbind = rockchip_lvds_unbind,
};
static int rockchip_lvds_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rockchip_lvds *lvds;
const struct of_device_id *match;
struct resource *res;
int ret;
if (!dev->of_node)
return -ENODEV;
lvds = devm_kzalloc(&pdev->dev, sizeof(*lvds), GFP_KERNEL);
if (!lvds)
return -ENOMEM;
lvds->dev = dev;
match = of_match_node(rockchip_lvds_dt_ids, dev->of_node);
if (!match)
return -ENODEV;
lvds->soc_data = match->data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
lvds->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(lvds->regs))
return PTR_ERR(lvds->regs);
lvds->pclk = devm_clk_get(&pdev->dev, "pclk_lvds");
if (IS_ERR(lvds->pclk)) {
DRM_DEV_ERROR(dev, "could not get pclk_lvds\n");
return PTR_ERR(lvds->pclk);
}
lvds->pins = devm_kzalloc(lvds->dev, sizeof(*lvds->pins),
GFP_KERNEL);
if (!lvds->pins)
return -ENOMEM;
lvds->pins->p = devm_pinctrl_get(lvds->dev);
if (IS_ERR(lvds->pins->p)) {
DRM_DEV_ERROR(dev, "no pinctrl handle\n");
devm_kfree(lvds->dev, lvds->pins);
lvds->pins = NULL;
} else {
lvds->pins->default_state =
pinctrl_lookup_state(lvds->pins->p, "lcdc");
if (IS_ERR(lvds->pins->default_state)) {
DRM_DEV_ERROR(dev, "no default pinctrl state\n");
devm_kfree(lvds->dev, lvds->pins);
lvds->pins = NULL;
}
}
lvds->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
"rockchip,grf");
if (IS_ERR(lvds->grf)) {
DRM_DEV_ERROR(dev, "missing rockchip,grf property\n");
return PTR_ERR(lvds->grf);
}
dev_set_drvdata(dev, lvds);
ret = clk_prepare(lvds->pclk);
if (ret < 0) {
DRM_DEV_ERROR(dev, "failed to prepare pclk_lvds\n");
return ret;
}
ret = component_add(&pdev->dev, &rockchip_lvds_component_ops);
if (ret < 0) {
DRM_DEV_ERROR(dev, "failed to add component\n");
clk_unprepare(lvds->pclk);
}
return ret;
}
static int rockchip_lvds_remove(struct platform_device *pdev)
{
struct rockchip_lvds *lvds = dev_get_drvdata(&pdev->dev);
component_del(&pdev->dev, &rockchip_lvds_component_ops);
clk_unprepare(lvds->pclk);
return 0;
}
struct platform_driver rockchip_lvds_driver = {
.probe = rockchip_lvds_probe,
.remove = rockchip_lvds_remove,
.driver = {
.name = "rockchip-lvds",
.of_match_table = of_match_ptr(rockchip_lvds_dt_ids),
},
};
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