u-boot/drivers/video/rockchip/rk3288_mipi.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

188 lines
4.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
* Author: Eric Gao <eric.gao@rock-chips.com>
*/
#include <common.h>
#include <clk.h>
#include <display.h>
#include <dm.h>
#include <fdtdec.h>
#include <panel.h>
#include <regmap.h>
#include "rk_mipi.h"
#include <syscon.h>
#include <asm/gpio.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <dm/uclass-internal.h>
#include <linux/kernel.h>
#include <asm/arch/clock.h>
#include <asm/arch/cru_rk3288.h>
#include <asm/arch/grf_rk3288.h>
#include <asm/arch/rockchip_mipi_dsi.h>
#define MHz 1000000
/* Select mipi dsi source, big or little vop */
static int rk_mipi_dsi_source_select(struct udevice *dev)
{
struct rk_mipi_priv *priv = dev_get_priv(dev);
struct rk3288_grf *grf = priv->grf;
struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev);
/* Select the video source */
switch (disp_uc_plat->source_id) {
case VOP_B:
rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK,
RK3288_DSI0_LCDC_SEL_BIG
<< RK3288_DSI0_LCDC_SEL_SHIFT);
break;
case VOP_L:
rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK,
RK3288_DSI0_LCDC_SEL_LIT
<< RK3288_DSI0_LCDC_SEL_SHIFT);
break;
default:
debug("%s: Invalid VOP id\n", __func__);
return -EINVAL;
}
return 0;
}
/* Setup mipi dphy working mode */
static void rk_mipi_dphy_mode_set(struct udevice *dev)
{
struct rk_mipi_priv *priv = dev_get_priv(dev);
struct rk3288_grf *grf = priv->grf;
int val;
/* Set Controller as TX mode */
val = RK3288_DPHY_TX0_RXMODE_DIS << RK3288_DPHY_TX0_RXMODE_SHIFT;
rk_clrsetreg(&grf->soc_con8, RK3288_DPHY_TX0_RXMODE_MASK, val);
/* Exit tx stop mode */
val |= RK3288_DPHY_TX0_TXSTOPMODE_EN
<< RK3288_DPHY_TX0_TXSTOPMODE_SHIFT;
rk_clrsetreg(&grf->soc_con8,
RK3288_DPHY_TX0_TXSTOPMODE_MASK, val);
/* Disable turnequest */
val |= RK3288_DPHY_TX0_TURNREQUEST_EN
<< RK3288_DPHY_TX0_TURNREQUEST_SHIFT;
rk_clrsetreg(&grf->soc_con8,
RK3288_DPHY_TX0_TURNREQUEST_MASK, val);
}
/*
* This function is called by rk_display_init() using rk_mipi_dsi_enable() and
* rk_mipi_phy_enable() to initialize mipi controller and dphy. If success,
* enable backlight.
*/
static int rk_mipi_enable(struct udevice *dev, int panel_bpp,
const struct display_timing *timing)
{
int ret;
struct rk_mipi_priv *priv = dev_get_priv(dev);
/* Fill the mipi controller parameter */
priv->ref_clk = 24 * MHz;
priv->sys_clk = priv->ref_clk;
priv->pix_clk = timing->pixelclock.typ;
priv->phy_clk = priv->pix_clk * 6;
priv->txbyte_clk = priv->phy_clk / 8;
priv->txesc_clk = 20 * MHz;
/* Select vop port, big or little */
rk_mipi_dsi_source_select(dev);
/* Set mipi dphy work mode */
rk_mipi_dphy_mode_set(dev);
/* Config and enable mipi dsi according to timing */
ret = rk_mipi_dsi_enable(dev, timing);
if (ret) {
debug("%s: rk_mipi_dsi_enable() failed (err=%d)\n",
__func__, ret);
return ret;
}
/* Config and enable mipi phy */
ret = rk_mipi_phy_enable(dev);
if (ret) {
debug("%s: rk_mipi_phy_enable() failed (err=%d)\n",
__func__, ret);
return ret;
}
/* Enable backlight */
ret = panel_enable_backlight(priv->panel);
if (ret) {
debug("%s: panel_enable_backlight() failed (err=%d)\n",
__func__, ret);
return ret;
}
return 0;
}
static int rk_mipi_ofdata_to_platdata(struct udevice *dev)
{
struct rk_mipi_priv *priv = dev_get_priv(dev);
priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
if (IS_ERR_OR_NULL(priv->grf)) {
debug("%s: Get syscon grf failed (ret=%p)\n",
__func__, priv->grf);
return -ENXIO;
}
priv->regs = dev_read_addr(dev);
if (priv->regs == FDT_ADDR_T_NONE) {
debug("%s: Get MIPI dsi address failed (ret=%lu)\n", __func__,
priv->regs);
return -ENXIO;
}
return 0;
}
/*
* Probe function: check panel existence and readingit's timing. Then config
* mipi dsi controller and enable it according to the timing parameter.
*/
static int rk_mipi_probe(struct udevice *dev)
{
int ret;
struct rk_mipi_priv *priv = dev_get_priv(dev);
ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
&priv->panel);
if (ret) {
debug("%s: Can not find panel (err=%d)\n", __func__, ret);
return ret;
}
return 0;
}
static const struct dm_display_ops rk_mipi_dsi_ops = {
.read_timing = rk_mipi_read_timing,
.enable = rk_mipi_enable,
};
static const struct udevice_id rk_mipi_dsi_ids[] = {
{ .compatible = "rockchip,rk3288_mipi_dsi" },
{ }
};
U_BOOT_DRIVER(rk_mipi_dsi) = {
.name = "rk_mipi_dsi",
.id = UCLASS_DISPLAY,
.of_match = rk_mipi_dsi_ids,
.ofdata_to_platdata = rk_mipi_ofdata_to_platdata,
.probe = rk_mipi_probe,
.ops = &rk_mipi_dsi_ops,
.priv_auto_alloc_size = sizeof(struct rk_mipi_priv),
};