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u-boot-brain/drivers/video/rockchip/rk_lvds.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2016 Rockchip Inc.
*/
#include <common.h>
#include <display.h>
#include <dm.h>
#include <edid.h>
#include <panel.h>
#include <regmap.h>
#include <syscon.h>
#include <asm/gpio.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/lvds_rk3288.h>
#include <asm/arch/grf_rk3288.h>
#include <dt-bindings/clock/rk3288-cru.h>
#include <dt-bindings/video/rk3288.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* struct rk_lvds_priv - private rockchip lvds display driver info
*
* @reg: LVDS register address
* @grf: GRF register
* @panel: Panel device that is used in driver
*
* @output: Output mode, decided single or double channel,
* LVDS or LVTLL
* @format: Data format that RGB data will packing as
*/
struct rk_lvds_priv {
void __iomem *regs;
struct rk3288_grf *grf;
struct udevice *panel;
int output;
int format;
};
static inline void lvds_writel(struct rk_lvds_priv *lvds, u32 offset, u32 val)
{
writel(val, lvds->regs + offset);
writel(val, lvds->regs + offset + 0x100);
}
int rk_lvds_enable(struct udevice *dev, int panel_bpp,
const struct display_timing *edid)
{
struct rk_lvds_priv *priv = dev_get_priv(dev);
struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
int ret = 0;
unsigned int val = 0;
ret = panel_enable_backlight(priv->panel);
if (ret) {
debug("%s: backlight error: %d\n", __func__, ret);
return ret;
}
/* Select the video source */
if (uc_plat->source_id)
val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT |
(RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16);
else
val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
rk_setreg(&priv->grf->soc_con6, val);
/* Select data transfer format */
val = priv->format;
if (priv->output == LVDS_OUTPUT_DUAL)
val |= LVDS_DUAL | LVDS_CH0_EN | LVDS_CH1_EN;
else if (priv->output == LVDS_OUTPUT_SINGLE)
val |= LVDS_CH0_EN;
else if (priv->output == LVDS_OUTPUT_RGB)
val |= LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN;
val |= (0xffff << 16);
rk_setreg(&priv->grf->soc_con7, val);
/* Enable LVDS PHY */
if (priv->output == LVDS_OUTPUT_RGB) {
lvds_writel(priv, RK3288_LVDS_CH0_REG0,
RK3288_LVDS_CH0_REG0_TTL_EN |
RK3288_LVDS_CH0_REG0_LANECK_EN |
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);
lvds_writel(priv, RK3288_LVDS_CH0_REG2,
RK3288_LVDS_PLL_FBDIV_REG2(0x46));
lvds_writel(priv, RK3288_LVDS_CH0_REG3,
RK3288_LVDS_PLL_FBDIV_REG3(0x46));
lvds_writel(priv, 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(priv, 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);
lvds_writel(priv, RK3288_LVDS_CH0_REGD,
RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
lvds_writel(priv, RK3288_LVDS_CH0_REG20,
RK3288_LVDS_CH0_REG20_LSB);
} else {
lvds_writel(priv, RK3288_LVDS_CH0_REG0,
RK3288_LVDS_CH0_REG0_LVDS_EN |
RK3288_LVDS_CH0_REG0_LANECK_EN |
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);
lvds_writel(priv, 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(priv, 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(priv, RK3288_LVDS_CH0_REG3,
RK3288_LVDS_PLL_FBDIV_REG3(0x46));
lvds_writel(priv, RK3288_LVDS_CH0_REG4, 0x00);
lvds_writel(priv, RK3288_LVDS_CH0_REG5, 0x00);
lvds_writel(priv, RK3288_LVDS_CH0_REGD,
RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
lvds_writel(priv, RK3288_LVDS_CH0_REG20,
RK3288_LVDS_CH0_REG20_LSB);
}
/* Power on */
writel(RK3288_LVDS_CFG_REGC_PLL_ENABLE,
priv->regs + RK3288_LVDS_CFG_REGC);
writel(RK3288_LVDS_CFG_REG21_TX_ENABLE,
priv->regs + RK3288_LVDS_CFG_REG21);
return 0;
}
int rk_lvds_read_timing(struct udevice *dev, struct display_timing *timing)
{
if (fdtdec_decode_display_timing
(gd->fdt_blob, dev_of_offset(dev), 0, timing)) {
debug("%s: Failed to decode display timing\n", __func__);
return -EINVAL;
}
return 0;
}
static int rk_lvds_ofdata_to_platdata(struct udevice *dev)
{
struct rk_lvds_priv *priv = dev_get_priv(dev);
const void *blob = gd->fdt_blob;
int node = dev_of_offset(dev);
int ret;
priv->regs = (void *)devfdt_get_addr(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
ret = fdtdec_get_int(blob, node, "rockchip,output", -1);
if (ret != -1) {
priv->output = ret;
debug("LVDS output : %d\n", ret);
} else {
/* default set it as output rgb */
priv->output = LVDS_OUTPUT_RGB;
}
ret = fdtdec_get_int(blob, node, "rockchip,data-mapping", -1);
if (ret != -1) {
priv->format = ret;
debug("LVDS data-mapping : %d\n", ret);
} else {
/* default set it as format jeida */
priv->format = LVDS_FORMAT_JEIDA;
}
ret = fdtdec_get_int(blob, node, "rockchip,data-width", -1);
if (ret != -1) {
debug("LVDS data-width : %d\n", ret);
if (ret == 24) {
priv->format |= LVDS_24BIT;
} else if (ret == 18) {
priv->format |= LVDS_18BIT;
} else {
debug("rockchip-lvds unsupport data-width[%d]\n", ret);
ret = -EINVAL;
return ret;
}
} else {
priv->format |= LVDS_24BIT;
}
return 0;
}
int rk_lvds_probe(struct udevice *dev)
{
struct rk_lvds_priv *priv = dev_get_priv(dev);
int ret;
ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
&priv->panel);
if (ret) {
debug("%s: Cannot find panel for '%s' (ret=%d)\n", __func__,
dev->name, ret);
return ret;
}
return 0;
}
static const struct dm_display_ops lvds_rockchip_ops = {
.read_timing = rk_lvds_read_timing,
.enable = rk_lvds_enable,
};
static const struct udevice_id rockchip_lvds_ids[] = {
{.compatible = "rockchip,rk3288-lvds"},
{}
};
U_BOOT_DRIVER(lvds_rockchip) = {
.name = "lvds_rockchip",
.id = UCLASS_DISPLAY,
.of_match = rockchip_lvds_ids,
.ops = &lvds_rockchip_ops,
.ofdata_to_platdata = rk_lvds_ofdata_to_platdata,
.probe = rk_lvds_probe,
.priv_auto_alloc_size = sizeof(struct rk_lvds_priv),
};
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