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CoolPi-Armbian-Rockchip-RK3.../drivers/misc/rk628/rk628_gvi.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2020 Rockchip Electronics Co., Ltd.
*
* Author: Guochun Huang <hero.huang@rock-chips.com>
*/
#include <linux/debugfs.h>
#include "linux/printk.h"
#include "rk628.h"
#include "rk628_config.h"
#include "rk628_combtxphy.h"
#include "rk628_gvi.h"
#include "panel.h"
#define GVI_RETRY_TIMEOUT 10
int rk628_gvi_parse(struct rk628 *rk628, struct device_node *gvi_np)
{
const char *string;
u32 val;
int ret;
if (!of_device_is_available(gvi_np))
return -EINVAL;
if (!of_property_read_u32(gvi_np, "gvi,lanes", &val))
rk628->gvi.lanes = val;
if (of_property_read_bool(gvi_np, "rockchip,division-mode"))
rk628->gvi.division_mode = true;
else
rk628->gvi.division_mode = false;
if (of_property_read_bool(gvi_np, "rockchip,gvi-frm-rst"))
rk628->gvi.frm_rst = true;
else
rk628->gvi.frm_rst = false;
if (!of_property_read_string(gvi_np, "bus-format", &string)) {
if (!strcmp(string, "rgb666"))
rk628->gvi.bus_format = GVI_MEDIA_BUS_FMT_RGB666_1X18;
else if (!strcmp(string, "rgb101010"))
rk628->gvi.bus_format = GVI_MEDIA_BUS_FMT_RGB101010_1X30;
else if (!strcmp(string, "yuyv8"))
rk628->gvi.bus_format = GVI_MEDIA_BUS_FMT_YUYV8_1X16;
else if (!strcmp(string, "yuyv10"))
rk628->gvi.bus_format = GVI_MEDIA_BUS_FMT_YUYV10_1X20;
else
rk628->gvi.bus_format = GVI_MEDIA_BUS_FMT_RGB888_1X24;
}
ret = rk628_panel_info_get(rk628, gvi_np);
if (ret)
return ret;
return 0;
}
static void rk628_gvi_get_info(struct rk628_gvi *gvi)
{
switch (gvi->bus_format) {
case GVI_MEDIA_BUS_FMT_RGB666_1X18:
gvi->byte_mode = 3;
gvi->color_depth = COLOR_DEPTH_RGB_YUV444_18BIT;
break;
case GVI_MEDIA_BUS_FMT_RGB888_1X24:
gvi->byte_mode = 4;
gvi->color_depth = COLOR_DEPTH_RGB_YUV444_24BIT;
break;
case GVI_MEDIA_BUS_FMT_RGB101010_1X30:
gvi->byte_mode = 4;
gvi->color_depth = COLOR_DEPTH_RGB_YUV444_30BIT;
break;
case GVI_MEDIA_BUS_FMT_YUYV8_1X16:
gvi->byte_mode = 3;
gvi->color_depth = COLOR_DEPTH_YUV422_16BIT;
break;
case GVI_MEDIA_BUS_FMT_YUYV10_1X20:
gvi->byte_mode = 3;
gvi->color_depth = COLOR_DEPTH_YUV422_20BIT;
break;
default:
gvi->byte_mode = 3;
gvi->color_depth = COLOR_DEPTH_RGB_YUV444_24BIT;
pr_err("unsupported bus_format: 0x%x\n", gvi->bus_format);
break;
}
}
static unsigned int rk628_gvi_get_lane_rate(struct rk628 *rk628)
{
struct rk628_gvi *gvi = &rk628->gvi;
u32 lane_bit_rate, min_lane_rate = 500000, max_lane_rate = 4000000;
u64 total_bw;
struct rk628_display_mode *src = &rk628->src_mode;
const struct rk628_display_mode *dst = &rk628->dst_mode;
u64 dst_rate, src_rate;
src_rate = src->clock * 1000;
dst_rate = src_rate * dst->vtotal * dst->htotal;
do_div(dst_rate, (src->vtotal * src->htotal));
do_div(dst_rate, 1000);
/**
* [ENCODER TOTAL BIT-RATE](bps) = [byte mode](byte) x 10 / [pixel clock](HZ)
*
* lane_bit_rate = [total bit-rate](bps) / [lane number]
*
* 500Mbps <= lane_bit_rate <= 4Gbps
*/
total_bw = (u64)gvi->byte_mode * 10 * dst_rate;/* Kbps */
do_div(total_bw, gvi->lanes);
lane_bit_rate = total_bw;
if (lane_bit_rate < min_lane_rate)
lane_bit_rate = min_lane_rate;
if (lane_bit_rate > max_lane_rate)
lane_bit_rate = max_lane_rate;
return lane_bit_rate;
}
static void rk628_gvi_pre_enable(struct rk628 *rk628, struct rk628_gvi *gvi)
{
/* gvi reset */
rk628_i2c_update_bits(rk628, GVI_SYS_RST, SYS_RST_SOFT_RST,
SYS_RST_SOFT_RST);
udelay(10);
rk628_i2c_update_bits(rk628, GVI_SYS_RST, SYS_RST_SOFT_RST, 0);
udelay(10);
rk628_i2c_write(rk628, GRF_SCALER_CON0, SCL_8_PIXEL_ALIGN(1));
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL0, SYS_CTRL0_LANE_NUM_MASK,
SYS_CTRL0_LANE_NUM(gvi->lanes - 1));
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL0, SYS_CTRL0_BYTE_MODE_MASK,
SYS_CTRL0_BYTE_MODE(gvi->byte_mode ==
3 ? 0 : (gvi->byte_mode == 4 ? 1 : 2)));
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL0, SYS_CTRL0_SECTION_NUM_MASK,
SYS_CTRL0_SECTION_NUM(gvi->division_mode));
rk628_i2c_update_bits(rk628, GRF_POST_PROC_CON, SW_SPLIT_EN,
gvi->division_mode ? SW_SPLIT_EN : 0);
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL1, SYS_CTRL1_DUAL_PIXEL_EN,
gvi->division_mode ? SYS_CTRL1_DUAL_PIXEL_EN : 0);
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL0, SYS_CTRL0_FRM_RST_EN,
gvi->frm_rst ? SYS_CTRL0_FRM_RST_EN : 0);
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL1, SYS_CTRL1_LANE_ALIGN_EN, 0);
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL1, SYS_CTRL1_COLOR_DEPTH_MASK,
SYS_CTRL1_COLOR_DEPTH(gvi->color_depth));
}
static void rk628_gvi_enable_color_bar(struct rk628 *rk628,
struct rk628_gvi *gvi)
{
const struct rk628_display_mode *mode = &rk628->dst_mode;
u16 vm_hactive, vm_hback_porch, vm_hsync_len;
u16 vm_vactive, vm_vback_porch, vm_vsync_len;
u16 hsync_len, hact_st, hact_end, htotal;
u16 vsync_len, vact_st, vact_end, vtotal;
vm_hactive = mode->hdisplay;
vm_hsync_len = mode->hsync_end - mode->hsync_start;
vm_hback_porch = mode->htotal - mode->hsync_end;
vm_vactive = mode->vdisplay;
vm_vsync_len = mode->vsync_end - mode->vsync_start;
vm_vback_porch = mode->vtotal - mode->vsync_end;
if (gvi->division_mode) {
hsync_len = vm_hsync_len / 2;
hact_st = (vm_hsync_len + vm_hback_porch) / 2;
hact_end = (vm_hsync_len + vm_hback_porch + vm_hactive) / 2;
htotal = mode->htotal / 2;
} else {
hsync_len = vm_hsync_len;
hact_st = vm_hsync_len + vm_hback_porch;
hact_end = vm_hsync_len + vm_hback_porch + vm_hactive;
htotal = mode->htotal;
}
vsync_len = vm_vsync_len;
vact_st = vsync_len + vm_vback_porch;
vact_end = vact_st + vm_vactive;
vtotal = mode->vtotal;
rk628_i2c_write(rk628, GVI_COLOR_BAR_HTIMING0,
hact_st << 16 | hsync_len);
rk628_i2c_write(rk628, GVI_COLOR_BAR_HTIMING1,
(htotal - 1) << 16 | hact_end);
rk628_i2c_write(rk628, GVI_COLOR_BAR_VTIMING0,
vact_st << 16 | vsync_len);
rk628_i2c_write(rk628, GVI_COLOR_BAR_VTIMING1,
(vtotal - 1) << 16 | vact_end);
rk628_i2c_update_bits(rk628, GVI_COLOR_BAR_CTRL, COLOR_BAR_EN, 0);
}
static int rk628_gvi_color_bar_show(struct seq_file *s, void *data)
{
seq_puts(s, " Enable color bar:\n");
seq_puts(s, " example: echo 1 > /sys/kernel/debug/rk628/2-0050/gvi_color_bar\n");
seq_puts(s, " Disable color bar:\n");
seq_puts(s, " example: echo 0 > /sys/kernel/debug/rk628/2-0050/gvi_color_bar\n");
return 0;
}
static int rk628_gvi_color_bar_open(struct inode *inode, struct file *file)
{
return single_open(file, rk628_gvi_color_bar_show, inode->i_private);
}
static ssize_t rk628_gvi_color_bar_write(struct file *file, const char __user *ubuf,
size_t len, loff_t *offp)
{
struct rk628 *rk628 = ((struct seq_file *)file->private_data)->private;
u8 mode;
if (kstrtou8_from_user(ubuf, len, 0, &mode))
return -EFAULT;
rk628_i2c_update_bits(rk628, GVI_COLOR_BAR_CTRL, COLOR_BAR_EN, mode ? 1 : 0);
return len;
}
static const struct file_operations rk628_gvi_color_bar_fops = {
.owner = THIS_MODULE,
.open = rk628_gvi_color_bar_open,
.read = seq_read,
.write = rk628_gvi_color_bar_write,
.llseek = seq_lseek,
.release = single_release,
};
void rk628_gvi_create_debugfs_file(struct rk628 *rk628)
{
if (rk628_output_is_gvi(rk628))
debugfs_create_file("gvi_color_bar", 0600, rk628->debug_dir,
rk628, &rk628_gvi_color_bar_fops);
}
static void rk628_gvi_post_enable(struct rk628 *rk628, struct rk628_gvi *gvi)
{
u32 val;
val = SYS_CTRL0_GVI_EN | SYS_CTRL0_AUTO_GATING;
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL0, val, 3);
}
void rk628_gvi_enable(struct rk628 *rk628)
{
struct rk628_gvi *gvi = &rk628->gvi;
unsigned int rate;
u32 mask = SW_OUTPUT_MODE_MASK;
u32 val = SW_OUTPUT_MODE(OUTPUT_MODE_GVI);
int i = 0;
rk628_gvi_get_info(gvi);
rate = rk628_gvi_get_lane_rate(rk628);
/* set gvi_hpd and gvi_lock mux */
rk628_i2c_write(rk628, GRF_GPIO3AB_SEL_CON, 0x06000600);
if (rk628->version == RK628F_VERSION) {
mask = SW_OUTPUT_COMBTX_MODE_MASK;
val = SW_OUTPUT_COMBTX_MODE(OUTPUT_MODE_GVI);
}
rk628_i2c_update_bits(rk628, GRF_SYSTEM_CON0, mask, val);
rk628_combtxphy_set_bus_width(rk628, rate);
rk628_combtxphy_set_gvi_division_mode(rk628, gvi->division_mode);
rk628_combtxphy_set_mode(rk628, PHY_MODE_VIDEO_GVI);
rate = rk628_combtxphy_get_bus_width(rk628);
rk628_combtxphy_power_on(rk628);
rk628_gvi_pre_enable(rk628, gvi);
rk628_panel_prepare(rk628);
rk628_gvi_enable_color_bar(rk628, gvi);
rk628_gvi_post_enable(rk628, gvi);
for (i = 0; i < 100; i++) {
rk628_i2c_read(rk628, GVI_STATUS, &val);
if ((val & GVI_LOCKED_MASK) == GVI_LOCKED_STATUS)
break;
usleep_range(1000, 1100);
}
if (i == 100 && gvi->retry_times < GVI_RETRY_TIMEOUT) {
dev_info(rk628->dev, "GVI Lock failed: 0x%x, try again: %d\n", val, gvi->retry_times);
gvi->retry_times++;
rk628_gvi_disable(rk628);
usleep_range(50000, 51000);
rk628_gvi_enable(rk628);
}
if (gvi->retry_times >= GVI_RETRY_TIMEOUT && i == 100) {
dev_info(rk628->dev, "GVI Lock failed, please check hardware!\n");
return;
}
rk628_panel_enable(rk628);
if (i != 100)
gvi->retry_times = 0;
dev_info(rk628->dev,
"GVI-Link bandwidth: %d x %d Mbps, Byte mode: %d, Color Depty: %d, %s division mode\n",
rate, gvi->lanes, gvi->byte_mode, gvi->color_depth,
gvi->division_mode ? "two" : "one");
}
void rk628_gvi_disable(struct rk628 *rk628)
{
rk628_panel_disable(rk628);
rk628_panel_unprepare(rk628);
rk628_i2c_update_bits(rk628, GVI_SYS_CTRL0, SYS_CTRL0_GVI_EN, 0);
rk628_combtxphy_power_off(rk628);
}
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