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nest-open-source / nest-learning-thermostat / 5.9.4 / linux-imx-ul / 0abf22841f96ab9bd9487c31c83bc9742ced27f8 / . / drivers / gpu / drm / msm / dsi / dsi_host.c
blob: 649d20d29f9298a8852e6d0368008becb348fe03 [file] [log] [blame]
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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 <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/regulator/consumer.h>
#include <linux/spinlock.h>
#include <video/mipi_display.h>
#include "dsi.h"
#include "dsi.xml.h"
#define MSM_DSI_VER_MAJOR_V2 0x02
#define MSM_DSI_VER_MAJOR_6G 0x03
#define MSM_DSI_6G_VER_MINOR_V1_0 0x10000000
#define MSM_DSI_6G_VER_MINOR_V1_1 0x10010000
#define MSM_DSI_6G_VER_MINOR_V1_1_1 0x10010001
#define MSM_DSI_6G_VER_MINOR_V1_2 0x10020000
#define MSM_DSI_6G_VER_MINOR_V1_3_1 0x10030001
#define DSI_6G_REG_SHIFT 4
#define DSI_REGULATOR_MAX 8
struct dsi_reg_entry {
char name[32];
int min_voltage;
int max_voltage;
int enable_load;
int disable_load;
};
struct dsi_reg_config {
int num;
struct dsi_reg_entry regs[DSI_REGULATOR_MAX];
};
struct dsi_config {
u32 major;
u32 minor;
u32 io_offset;
enum msm_dsi_phy_type phy_type;
struct dsi_reg_config reg_cfg;
};
static const struct dsi_config dsi_cfgs[] = {
{MSM_DSI_VER_MAJOR_V2, 0, 0, MSM_DSI_PHY_UNKNOWN},
{ /* 8974 v1 */
.major = MSM_DSI_VER_MAJOR_6G,
.minor = MSM_DSI_6G_VER_MINOR_V1_0,
.io_offset = DSI_6G_REG_SHIFT,
.phy_type = MSM_DSI_PHY_28NM,
.reg_cfg = {
.num = 4,
.regs = {
{"gdsc", -1, -1, -1, -1},
{"vdd", 3000000, 3000000, 150000, 100},
{"vdda", 1200000, 1200000, 100000, 100},
{"vddio", 1800000, 1800000, 100000, 100},
},
},
},
{ /* 8974 v2 */
.major = MSM_DSI_VER_MAJOR_6G,
.minor = MSM_DSI_6G_VER_MINOR_V1_1,
.io_offset = DSI_6G_REG_SHIFT,
.phy_type = MSM_DSI_PHY_28NM,
.reg_cfg = {
.num = 4,
.regs = {
{"gdsc", -1, -1, -1, -1},
{"vdd", 3000000, 3000000, 150000, 100},
{"vdda", 1200000, 1200000, 100000, 100},
{"vddio", 1800000, 1800000, 100000, 100},
},
},
},
{ /* 8974 v3 */
.major = MSM_DSI_VER_MAJOR_6G,
.minor = MSM_DSI_6G_VER_MINOR_V1_1_1,
.io_offset = DSI_6G_REG_SHIFT,
.phy_type = MSM_DSI_PHY_28NM,
.reg_cfg = {
.num = 4,
.regs = {
{"gdsc", -1, -1, -1, -1},
{"vdd", 3000000, 3000000, 150000, 100},
{"vdda", 1200000, 1200000, 100000, 100},
{"vddio", 1800000, 1800000, 100000, 100},
},
},
},
{ /* 8084 */
.major = MSM_DSI_VER_MAJOR_6G,
.minor = MSM_DSI_6G_VER_MINOR_V1_2,
.io_offset = DSI_6G_REG_SHIFT,
.phy_type = MSM_DSI_PHY_28NM,
.reg_cfg = {
.num = 4,
.regs = {
{"gdsc", -1, -1, -1, -1},
{"vdd", 3000000, 3000000, 150000, 100},
{"vdda", 1200000, 1200000, 100000, 100},
{"vddio", 1800000, 1800000, 100000, 100},
},
},
},
{ /* 8916 */
.major = MSM_DSI_VER_MAJOR_6G,
.minor = MSM_DSI_6G_VER_MINOR_V1_3_1,
.io_offset = DSI_6G_REG_SHIFT,
.phy_type = MSM_DSI_PHY_28NM,
.reg_cfg = {
.num = 4,
.regs = {
{"gdsc", -1, -1, -1, -1},
{"vdd", 2850000, 2850000, 100000, 100},
{"vdda", 1200000, 1200000, 100000, 100},
{"vddio", 1800000, 1800000, 100000, 100},
},
},
},
};
static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
{
u32 ver;
u32 ver_6g;
if (!major || !minor)
return -EINVAL;
/* From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
* makes all other registers 4-byte shifted down.
*/
ver_6g = msm_readl(base + REG_DSI_6G_HW_VERSION);
if (ver_6g == 0) {
ver = msm_readl(base + REG_DSI_VERSION);
ver = FIELD(ver, DSI_VERSION_MAJOR);
if (ver <= MSM_DSI_VER_MAJOR_V2) {
/* old versions */
*major = ver;
*minor = 0;
return 0;
} else {
return -EINVAL;
}
} else {
ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
ver = FIELD(ver, DSI_VERSION_MAJOR);
if (ver == MSM_DSI_VER_MAJOR_6G) {
/* 6G version */
*major = ver;
*minor = ver_6g;
return 0;
} else {
return -EINVAL;
}
}
}
#define DSI_ERR_STATE_ACK 0x0000
#define DSI_ERR_STATE_TIMEOUT 0x0001
#define DSI_ERR_STATE_DLN0_PHY 0x0002
#define DSI_ERR_STATE_FIFO 0x0004
#define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
#define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
#define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
#define DSI_CLK_CTRL_ENABLE_CLKS \
(DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
struct msm_dsi_host {
struct mipi_dsi_host base;
struct platform_device *pdev;
struct drm_device *dev;
int id;
void __iomem *ctrl_base;
struct regulator_bulk_data supplies[DSI_REGULATOR_MAX];
struct clk *mdp_core_clk;
struct clk *ahb_clk;
struct clk *axi_clk;
struct clk *mmss_misc_ahb_clk;
struct clk *byte_clk;
struct clk *esc_clk;
struct clk *pixel_clk;
u32 byte_clk_rate;
struct gpio_desc *disp_en_gpio;
struct gpio_desc *te_gpio;
const struct dsi_config *cfg;
struct completion dma_comp;
struct completion video_comp;
struct mutex dev_mutex;
struct mutex cmd_mutex;
struct mutex clk_mutex;
spinlock_t intr_lock; /* Protect interrupt ctrl register */
u32 err_work_state;
struct work_struct err_work;
struct workqueue_struct *workqueue;
struct drm_gem_object *tx_gem_obj;
u8 *rx_buf;
struct drm_display_mode *mode;
/* Panel info */
struct device_node *panel_node;
unsigned int channel;
unsigned int lanes;
enum mipi_dsi_pixel_format format;
unsigned long mode_flags;
u32 dma_cmd_ctrl_restore;
bool registered;
bool power_on;
int irq;
};
static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
{
switch (fmt) {
case MIPI_DSI_FMT_RGB565: return 16;
case MIPI_DSI_FMT_RGB666_PACKED: return 18;
case MIPI_DSI_FMT_RGB666:
case MIPI_DSI_FMT_RGB888:
default: return 24;
}
}
static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
{
return msm_readl(msm_host->ctrl_base + msm_host->cfg->io_offset + reg);
}
static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
{
msm_writel(data, msm_host->ctrl_base + msm_host->cfg->io_offset + reg);
}
static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
static const struct dsi_config *dsi_get_config(struct msm_dsi_host *msm_host)
{
const struct dsi_config *cfg;
struct regulator *gdsc_reg;
int i, ret;
u32 major = 0, minor = 0;
gdsc_reg = regulator_get(&msm_host->pdev->dev, "gdsc");
if (IS_ERR_OR_NULL(gdsc_reg)) {
pr_err("%s: cannot get gdsc\n", __func__);
goto fail;
}
ret = regulator_enable(gdsc_reg);
if (ret) {
pr_err("%s: unable to enable gdsc\n", __func__);
regulator_put(gdsc_reg);
goto fail;
}
ret = clk_prepare_enable(msm_host->ahb_clk);
if (ret) {
pr_err("%s: unable to enable ahb_clk\n", __func__);
regulator_disable(gdsc_reg);
regulator_put(gdsc_reg);
goto fail;
}
ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
clk_disable_unprepare(msm_host->ahb_clk);
regulator_disable(gdsc_reg);
regulator_put(gdsc_reg);
if (ret) {
pr_err("%s: Invalid version\n", __func__);
goto fail;
}
for (i = 0; i < ARRAY_SIZE(dsi_cfgs); i++) {
cfg = dsi_cfgs + i;
if ((cfg->major == major) && (cfg->minor == minor))
return cfg;
}
pr_err("%s: Version %x:%x not support\n", __func__, major, minor);
fail:
return NULL;
}
static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
{
return container_of(host, struct msm_dsi_host, base);
}
static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
{
struct regulator_bulk_data *s = msm_host->supplies;
const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
int num = msm_host->cfg->reg_cfg.num;
int i;
DBG("");
for (i = num - 1; i >= 0; i--)
if (regs[i].disable_load >= 0)
regulator_set_load(s[i].consumer,
regs[i].disable_load);
regulator_bulk_disable(num, s);
}
static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
{
struct regulator_bulk_data *s = msm_host->supplies;
const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
int num = msm_host->cfg->reg_cfg.num;
int ret, i;
DBG("");
for (i = 0; i < num; i++) {
if (regs[i].enable_load >= 0) {
ret = regulator_set_load(s[i].consumer,
regs[i].enable_load);
if (ret < 0) {
pr_err("regulator %d set op mode failed, %d\n",
i, ret);
goto fail;
}
}
}
ret = regulator_bulk_enable(num, s);
if (ret < 0) {
pr_err("regulator enable failed, %d\n", ret);
goto fail;
}
return 0;
fail:
for (i--; i >= 0; i--)
regulator_set_load(s[i].consumer, regs[i].disable_load);
return ret;
}
static int dsi_regulator_init(struct msm_dsi_host *msm_host)
{
struct regulator_bulk_data *s = msm_host->supplies;
const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs;
int num = msm_host->cfg->reg_cfg.num;
int i, ret;
for (i = 0; i < num; i++)
s[i].supply = regs[i].name;
ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s);
if (ret < 0) {
pr_err("%s: failed to init regulator, ret=%d\n",
__func__, ret);
return ret;
}
for (i = 0; i < num; i++) {
if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) {
ret = regulator_set_voltage(s[i].consumer,
regs[i].min_voltage, regs[i].max_voltage);
if (ret < 0) {
pr_err("regulator %d set voltage failed, %d\n",
i, ret);
return ret;
}
}
}
return 0;
}
static int dsi_clk_init(struct msm_dsi_host *msm_host)
{
struct device *dev = &msm_host->pdev->dev;
int ret = 0;
msm_host->mdp_core_clk = devm_clk_get(dev, "mdp_core_clk");
if (IS_ERR(msm_host->mdp_core_clk)) {
ret = PTR_ERR(msm_host->mdp_core_clk);
pr_err("%s: Unable to get mdp core clk. ret=%d\n",
__func__, ret);
goto exit;
}
msm_host->ahb_clk = devm_clk_get(dev, "iface_clk");
if (IS_ERR(msm_host->ahb_clk)) {
ret = PTR_ERR(msm_host->ahb_clk);
pr_err("%s: Unable to get mdss ahb clk. ret=%d\n",
__func__, ret);
goto exit;
}
msm_host->axi_clk = devm_clk_get(dev, "bus_clk");
if (IS_ERR(msm_host->axi_clk)) {
ret = PTR_ERR(msm_host->axi_clk);
pr_err("%s: Unable to get axi bus clk. ret=%d\n",
__func__, ret);
goto exit;
}
msm_host->mmss_misc_ahb_clk = devm_clk_get(dev, "core_mmss_clk");
if (IS_ERR(msm_host->mmss_misc_ahb_clk)) {
ret = PTR_ERR(msm_host->mmss_misc_ahb_clk);
pr_err("%s: Unable to get mmss misc ahb clk. ret=%d\n",
__func__, ret);
goto exit;
}
msm_host->byte_clk = devm_clk_get(dev, "byte_clk");
if (IS_ERR(msm_host->byte_clk)) {
ret = PTR_ERR(msm_host->byte_clk);
pr_err("%s: can't find dsi_byte_clk. ret=%d\n",
__func__, ret);
msm_host->byte_clk = NULL;
goto exit;
}
msm_host->pixel_clk = devm_clk_get(dev, "pixel_clk");
if (IS_ERR(msm_host->pixel_clk)) {
ret = PTR_ERR(msm_host->pixel_clk);
pr_err("%s: can't find dsi_pixel_clk. ret=%d\n",
__func__, ret);
msm_host->pixel_clk = NULL;
goto exit;
}
msm_host->esc_clk = devm_clk_get(dev, "core_clk");
if (IS_ERR(msm_host->esc_clk)) {
ret = PTR_ERR(msm_host->esc_clk);
pr_err("%s: can't find dsi_esc_clk. ret=%d\n",
__func__, ret);
msm_host->esc_clk = NULL;
goto exit;
}
exit:
return ret;
}
static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
{
int ret;
DBG("id=%d", msm_host->id);
ret = clk_prepare_enable(msm_host->mdp_core_clk);
if (ret) {
pr_err("%s: failed to enable mdp_core_clock, %d\n",
__func__, ret);
goto core_clk_err;
}
ret = clk_prepare_enable(msm_host->ahb_clk);
if (ret) {
pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret);
goto ahb_clk_err;
}
ret = clk_prepare_enable(msm_host->axi_clk);
if (ret) {
pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret);
goto axi_clk_err;
}
ret = clk_prepare_enable(msm_host->mmss_misc_ahb_clk);
if (ret) {
pr_err("%s: failed to enable mmss misc ahb clk, %d\n",
__func__, ret);
goto misc_ahb_clk_err;
}
return 0;
misc_ahb_clk_err:
clk_disable_unprepare(msm_host->axi_clk);
axi_clk_err:
clk_disable_unprepare(msm_host->ahb_clk);
ahb_clk_err:
clk_disable_unprepare(msm_host->mdp_core_clk);
core_clk_err:
return ret;
}
static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
{
DBG("");
clk_disable_unprepare(msm_host->mmss_misc_ahb_clk);
clk_disable_unprepare(msm_host->axi_clk);
clk_disable_unprepare(msm_host->ahb_clk);
clk_disable_unprepare(msm_host->mdp_core_clk);
}
static int dsi_link_clk_enable(struct msm_dsi_host *msm_host)
{
int ret;
DBG("Set clk rates: pclk=%d, byteclk=%d",
msm_host->mode->clock, msm_host->byte_clk_rate);
ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
if (ret) {
pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
goto error;
}
ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
if (ret) {
pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
goto error;
}
ret = clk_prepare_enable(msm_host->esc_clk);
if (ret) {
pr_err("%s: Failed to enable dsi esc clk\n", __func__);
goto error;
}
ret = clk_prepare_enable(msm_host->byte_clk);
if (ret) {
pr_err("%s: Failed to enable dsi byte clk\n", __func__);
goto byte_clk_err;
}
ret = clk_prepare_enable(msm_host->pixel_clk);
if (ret) {
pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
goto pixel_clk_err;
}
return 0;
pixel_clk_err:
clk_disable_unprepare(msm_host->byte_clk);
byte_clk_err:
clk_disable_unprepare(msm_host->esc_clk);
error:
return ret;
}
static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
{
clk_disable_unprepare(msm_host->esc_clk);
clk_disable_unprepare(msm_host->pixel_clk);
clk_disable_unprepare(msm_host->byte_clk);
}
static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable)
{
int ret = 0;
mutex_lock(&msm_host->clk_mutex);
if (enable) {
ret = dsi_bus_clk_enable(msm_host);
if (ret) {
pr_err("%s: Can not enable bus clk, %d\n",
__func__, ret);
goto unlock_ret;
}
ret = dsi_link_clk_enable(msm_host);
if (ret) {
pr_err("%s: Can not enable link clk, %d\n",
__func__, ret);
dsi_bus_clk_disable(msm_host);
goto unlock_ret;
}
} else {
dsi_link_clk_disable(msm_host);
dsi_bus_clk_disable(msm_host);
}
unlock_ret:
mutex_unlock(&msm_host->clk_mutex);
return ret;
}
static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
{
struct drm_display_mode *mode = msm_host->mode;
u8 lanes = msm_host->lanes;
u32 bpp = dsi_get_bpp(msm_host->format);
u32 pclk_rate;
if (!mode) {
pr_err("%s: mode not set\n", __func__);
return -EINVAL;
}
pclk_rate = mode->clock * 1000;
if (lanes > 0) {
msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
} else {
pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
}
DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
return 0;
}
static void dsi_phy_sw_reset(struct msm_dsi_host *msm_host)
{
DBG("");
dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
/* Make sure fully reset */
wmb();
udelay(1000);
dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
udelay(100);
}
static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
{
u32 intr;
unsigned long flags;
spin_lock_irqsave(&msm_host->intr_lock, flags);
intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
if (enable)
intr |= mask;
else
intr &= ~mask;
DBG("intr=%x enable=%d", intr, enable);
dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
spin_unlock_irqrestore(&msm_host->intr_lock, flags);
}
static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
{
if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
return BURST_MODE;
else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
return NON_BURST_SYNCH_PULSE;
return NON_BURST_SYNCH_EVENT;
}
static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
const enum mipi_dsi_pixel_format mipi_fmt)
{
switch (mipi_fmt) {
case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
default: return VID_DST_FORMAT_RGB888;
}
}
static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
const enum mipi_dsi_pixel_format mipi_fmt)
{
switch (mipi_fmt) {
case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
case MIPI_DSI_FMT_RGB666_PACKED:
case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666;
case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
default: return CMD_DST_FORMAT_RGB888;
}
}
static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
u32 clk_pre, u32 clk_post)
{
u32 flags = msm_host->mode_flags;
enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
u32 data = 0;
if (!enable) {
dsi_write(msm_host, REG_DSI_CTRL, 0);
return;
}
if (flags & MIPI_DSI_MODE_VIDEO) {
if (flags & MIPI_DSI_MODE_VIDEO_HSE)
data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
if (flags & MIPI_DSI_MODE_VIDEO_HFP)
data |= DSI_VID_CFG0_HFP_POWER_STOP;
if (flags & MIPI_DSI_MODE_VIDEO_HBP)
data |= DSI_VID_CFG0_HBP_POWER_STOP;
if (flags & MIPI_DSI_MODE_VIDEO_HSA)
data |= DSI_VID_CFG0_HSA_POWER_STOP;
/* Always set low power stop mode for BLLP
* to let command engine send packets
*/
data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
DSI_VID_CFG0_BLLP_POWER_STOP;
data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
dsi_write(msm_host, REG_DSI_VID_CFG0, data);
/* Do not swap RGB colors */
data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
} else {
/* Do not swap RGB colors */
data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
DSI_CMD_CFG1_WR_MEM_CONTINUE(
MIPI_DCS_WRITE_MEMORY_CONTINUE);
/* Always insert DCS command */
data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
}
dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
DSI_CMD_DMA_CTRL_LOW_POWER);
data = 0;
/* Always assume dedicated TE pin */
data |= DSI_TRIG_CTRL_TE;
data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) &&
(msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(clk_post) |
DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(clk_pre);
dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
data = 0;
if (!(flags & MIPI_DSI_MODE_EOT_PACKET))
data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
/* allow only ack-err-status to generate interrupt */
dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
data = DSI_CTRL_CLK_EN;
DBG("lane number=%d", msm_host->lanes);
if (msm_host->lanes == 2) {
data |= DSI_CTRL_LANE1 | DSI_CTRL_LANE2;
/* swap lanes for 2-lane panel for better performance */
dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_1230));
} else {
/* Take 4 lanes as default */
data |= DSI_CTRL_LANE0 | DSI_CTRL_LANE1 | DSI_CTRL_LANE2 |
DSI_CTRL_LANE3;
/* Do not swap lanes for 4-lane panel */
dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_0123));
}
data |= DSI_CTRL_ENABLE;
dsi_write(msm_host, REG_DSI_CTRL, data);
}
static void dsi_timing_setup(struct msm_dsi_host *msm_host)
{
struct drm_display_mode *mode = msm_host->mode;
u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
u32 h_total = mode->htotal;
u32 v_total = mode->vtotal;
u32 hs_end = mode->hsync_end - mode->hsync_start;
u32 vs_end = mode->vsync_end - mode->vsync_start;
u32 ha_start = h_total - mode->hsync_start;
u32 ha_end = ha_start + mode->hdisplay;
u32 va_start = v_total - mode->vsync_start;
u32 va_end = va_start + mode->vdisplay;
u32 wc;
DBG("");
if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
dsi_write(msm_host, REG_DSI_ACTIVE_H,
DSI_ACTIVE_H_START(ha_start) |
DSI_ACTIVE_H_END(ha_end));
dsi_write(msm_host, REG_DSI_ACTIVE_V,
DSI_ACTIVE_V_START(va_start) |
DSI_ACTIVE_V_END(va_end));
dsi_write(msm_host, REG_DSI_TOTAL,
DSI_TOTAL_H_TOTAL(h_total - 1) |
DSI_TOTAL_V_TOTAL(v_total - 1));
dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
DSI_ACTIVE_HSYNC_START(hs_start) |
DSI_ACTIVE_HSYNC_END(hs_end));
dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
} else { /* command mode */
/* image data and 1 byte write_memory_start cmd */
wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL,
DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) |
DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL(
msm_host->channel) |
DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE(
MIPI_DSI_DCS_LONG_WRITE));
dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL,
DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) |
DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay));
}
}
static void dsi_sw_reset(struct msm_dsi_host *msm_host)
{
dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
wmb(); /* clocks need to be enabled before reset */
dsi_write(msm_host, REG_DSI_RESET, 1);
wmb(); /* make sure reset happen */
dsi_write(msm_host, REG_DSI_RESET, 0);
}
static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
bool video_mode, bool enable)
{
u32 dsi_ctrl;
dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
if (!enable) {
dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
DSI_CTRL_CMD_MODE_EN);
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
DSI_IRQ_MASK_VIDEO_DONE, 0);
} else {
if (video_mode) {
dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
} else { /* command mode */
dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
}
dsi_ctrl |= DSI_CTRL_ENABLE;
}
dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
}
static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
{
u32 data;
data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
if (mode == 0)
data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
else
data |= DSI_CMD_DMA_CTRL_LOW_POWER;
dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
}
static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
{
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
reinit_completion(&msm_host->video_comp);
wait_for_completion_timeout(&msm_host->video_comp,
msecs_to_jiffies(70));
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
}
static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
{
if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
return;
if (msm_host->power_on) {
dsi_wait4video_done(msm_host);
/* delay 4 ms to skip BLLP */
usleep_range(2000, 4000);
}
}
/* dsi_cmd */
static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
{
struct drm_device *dev = msm_host->dev;
int ret;
u32 iova;
mutex_lock(&dev->struct_mutex);
msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED);
if (IS_ERR(msm_host->tx_gem_obj)) {
ret = PTR_ERR(msm_host->tx_gem_obj);
pr_err("%s: failed to allocate gem, %d\n", __func__, ret);
msm_host->tx_gem_obj = NULL;
mutex_unlock(&dev->struct_mutex);
return ret;
}
ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova);
if (ret) {
pr_err("%s: failed to get iova, %d\n", __func__, ret);
return ret;
}
mutex_unlock(&dev->struct_mutex);
if (iova & 0x07) {
pr_err("%s: buf NOT 8 bytes aligned\n", __func__);
return -EINVAL;
}
return 0;
}
static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
{
struct drm_device *dev = msm_host->dev;
if (msm_host->tx_gem_obj) {
msm_gem_put_iova(msm_host->tx_gem_obj, 0);
mutex_lock(&dev->struct_mutex);
msm_gem_free_object(msm_host->tx_gem_obj);
msm_host->tx_gem_obj = NULL;
mutex_unlock(&dev->struct_mutex);
}
}
/*
* prepare cmd buffer to be txed
*/
static int dsi_cmd_dma_add(struct drm_gem_object *tx_gem,
const struct mipi_dsi_msg *msg)
{
struct mipi_dsi_packet packet;
int len;
int ret;
u8 *data;
ret = mipi_dsi_create_packet(&packet, msg);
if (ret) {
pr_err("%s: create packet failed, %d\n", __func__, ret);
return ret;
}
len = (packet.size + 3) & (~0x3);
if (len > tx_gem->size) {
pr_err("%s: packet size is too big\n", __func__);
return -EINVAL;
}
data = msm_gem_vaddr(tx_gem);
if (IS_ERR(data)) {
ret = PTR_ERR(data);
pr_err("%s: get vaddr failed, %d\n", __func__, ret);
return ret;
}
/* MSM specific command format in memory */
data[0] = packet.header[1];
data[1] = packet.header[2];
data[2] = packet.header[0];
data[3] = BIT(7); /* Last packet */
if (mipi_dsi_packet_format_is_long(msg->type))
data[3] |= BIT(6);
if (msg->rx_buf && msg->rx_len)
data[3] |= BIT(5);
/* Long packet */
if (packet.payload && packet.payload_length)
memcpy(data + 4, packet.payload, packet.payload_length);
/* Append 0xff to the end */
if (packet.size < len)
memset(data + packet.size, 0xff, len - packet.size);
return len;
}
/*
* dsi_short_read1_resp: 1 parameter
*/
static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
{
u8 *data = msg->rx_buf;
if (data && (msg->rx_len >= 1)) {
*data = buf[1]; /* strip out dcs type */
return 1;
} else {
pr_err("%s: read data does not match with rx_buf len %zu\n",
__func__, msg->rx_len);
return -EINVAL;
}
}
/*
* dsi_short_read2_resp: 2 parameter
*/
static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
{
u8 *data = msg->rx_buf;
if (data && (msg->rx_len >= 2)) {
data[0] = buf[1]; /* strip out dcs type */
data[1] = buf[2];
return 2;
} else {
pr_err("%s: read data does not match with rx_buf len %zu\n",
__func__, msg->rx_len);
return -EINVAL;
}
}
static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
{
/* strip out 4 byte dcs header */
if (msg->rx_buf && msg->rx_len)
memcpy(msg->rx_buf, buf + 4, msg->rx_len);
return msg->rx_len;
}
static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
{
int ret;
u32 iova;
bool triggered;
ret = msm_gem_get_iova(msm_host->tx_gem_obj, 0, &iova);
if (ret) {
pr_err("%s: failed to get iova: %d\n", __func__, ret);
return ret;
}
reinit_completion(&msm_host->dma_comp);
dsi_wait4video_eng_busy(msm_host);
triggered = msm_dsi_manager_cmd_xfer_trigger(
msm_host->id, iova, len);
if (triggered) {
ret = wait_for_completion_timeout(&msm_host->dma_comp,
msecs_to_jiffies(200));
DBG("ret=%d", ret);
if (ret == 0)
ret = -ETIMEDOUT;
else
ret = len;
} else
ret = len;
return ret;
}
static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
u8 *buf, int rx_byte, int pkt_size)
{
u32 *lp, *temp, data;
int i, j = 0, cnt;
u32 read_cnt;
u8 reg[16];
int repeated_bytes = 0;
int buf_offset = buf - msm_host->rx_buf;
lp = (u32 *)buf;
temp = (u32 *)reg;
cnt = (rx_byte + 3) >> 2;
if (cnt > 4)
cnt = 4; /* 4 x 32 bits registers only */
if (rx_byte == 4)
read_cnt = 4;
else
read_cnt = pkt_size + 6;
/*
* In case of multiple reads from the panel, after the first read, there
* is possibility that there are some bytes in the payload repeating in
* the RDBK_DATA registers. Since we read all the parameters from the
* panel right from the first byte for every pass. We need to skip the
* repeating bytes and then append the new parameters to the rx buffer.
*/
if (read_cnt > 16) {
int bytes_shifted;
/* Any data more than 16 bytes will be shifted out.
* The temp read buffer should already contain these bytes.
* The remaining bytes in read buffer are the repeated bytes.
*/
bytes_shifted = read_cnt - 16;
repeated_bytes = buf_offset - bytes_shifted;
}
for (i = cnt - 1; i >= 0; i--) {
data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
*temp++ = ntohl(data); /* to host byte order */
DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
}
for (i = repeated_bytes; i < 16; i++)
buf[j++] = reg[i];
return j;
}
static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
const struct mipi_dsi_msg *msg)
{
int len, ret;
int bllp_len = msm_host->mode->hdisplay *
dsi_get_bpp(msm_host->format) / 8;
len = dsi_cmd_dma_add(msm_host->tx_gem_obj, msg);
if (!len) {
pr_err("%s: failed to add cmd type = 0x%x\n",
__func__, msg->type);
return -EINVAL;
}
/* for video mode, do not send cmds more than
* one pixel line, since it only transmit it
* during BLLP.
*/
/* TODO: if the command is sent in LP mode, the bit rate is only
* half of esc clk rate. In this case, if the video is already
* actively streaming, we need to check more carefully if the
* command can be fit into one BLLP.
*/
if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
__func__, len);
return -EINVAL;
}
ret = dsi_cmd_dma_tx(msm_host, len);
if (ret < len) {
pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n",
__func__, msg->type, (*(u8 *)(msg->tx_buf)), len);
return -ECOMM;
}
return len;
}
static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host)
{
u32 data0, data1;
data0 = dsi_read(msm_host, REG_DSI_CTRL);
data1 = data0;
data1 &= ~DSI_CTRL_ENABLE;
dsi_write(msm_host, REG_DSI_CTRL, data1);
/*
* dsi controller need to be disabled before
* clocks turned on
*/
wmb();
dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
wmb(); /* make sure clocks enabled */
/* dsi controller can only be reset while clocks are running */
dsi_write(msm_host, REG_DSI_RESET, 1);
wmb(); /* make sure reset happen */
dsi_write(msm_host, REG_DSI_RESET, 0);
wmb(); /* controller out of reset */
dsi_write(msm_host, REG_DSI_CTRL, data0);
wmb(); /* make sure dsi controller enabled again */
}
static void dsi_err_worker(struct work_struct *work)
{
struct msm_dsi_host *msm_host =
container_of(work, struct msm_dsi_host, err_work);
u32 status = msm_host->err_work_state;
pr_err_ratelimited("%s: status=%x\n", __func__, status);
if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
dsi_sw_reset_restore(msm_host);
/* It is safe to clear here because error irq is disabled. */
msm_host->err_work_state = 0;
/* enable dsi error interrupt */
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
}
static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
{
u32 status;
status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
if (status) {
dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
/* Writing of an extra 0 needed to clear error bits */
dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
msm_host->err_work_state |= DSI_ERR_STATE_ACK;
}
}
static void dsi_timeout_status(struct msm_dsi_host *msm_host)
{
u32 status;
status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
if (status) {
dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
}
}
static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
{
u32 status;
status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
if (status) {
dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
}
}
static void dsi_fifo_status(struct msm_dsi_host *msm_host)
{
u32 status;
status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
/* fifo underflow, overflow */
if (status) {
dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
msm_host->err_work_state |=
DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
}
}
static void dsi_status(struct msm_dsi_host *msm_host)
{
u32 status;
status = dsi_read(msm_host, REG_DSI_STATUS0);
if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
dsi_write(msm_host, REG_DSI_STATUS0, status);
msm_host->err_work_state |=
DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
}
}
static void dsi_clk_status(struct msm_dsi_host *msm_host)
{
u32 status;
status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
}
}
static void dsi_error(struct msm_dsi_host *msm_host)
{
/* disable dsi error interrupt */
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
dsi_clk_status(msm_host);
dsi_fifo_status(msm_host);
dsi_ack_err_status(msm_host);
dsi_timeout_status(msm_host);
dsi_status(msm_host);
dsi_dln0_phy_err(msm_host);
queue_work(msm_host->workqueue, &msm_host->err_work);
}
static irqreturn_t dsi_host_irq(int irq, void *ptr)
{
struct msm_dsi_host *msm_host = ptr;
u32 isr;
unsigned long flags;
if (!msm_host->ctrl_base)
return IRQ_HANDLED;
spin_lock_irqsave(&msm_host->intr_lock, flags);
isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
spin_unlock_irqrestore(&msm_host->intr_lock, flags);
DBG("isr=0x%x, id=%d", isr, msm_host->id);
if (isr & DSI_IRQ_ERROR)
dsi_error(msm_host);
if (isr & DSI_IRQ_VIDEO_DONE)
complete(&msm_host->video_comp);
if (isr & DSI_IRQ_CMD_DMA_DONE)
complete(&msm_host->dma_comp);
return IRQ_HANDLED;
}
static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
struct device *panel_device)
{
int ret;
msm_host->disp_en_gpio = devm_gpiod_get(panel_device,
"disp-enable");
if (IS_ERR(msm_host->disp_en_gpio)) {
DBG("cannot get disp-enable-gpios %ld",
PTR_ERR(msm_host->disp_en_gpio));
msm_host->disp_en_gpio = NULL;
}
if (msm_host->disp_en_gpio) {
ret = gpiod_direction_output(msm_host->disp_en_gpio, 0);
if (ret) {
pr_err("cannot set dir to disp-en-gpios %d\n", ret);
return ret;
}
}
msm_host->te_gpio = devm_gpiod_get(panel_device, "disp-te");
if (IS_ERR(msm_host->te_gpio)) {
DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
msm_host->te_gpio = NULL;
}
if (msm_host->te_gpio) {
ret = gpiod_direction_input(msm_host->te_gpio);
if (ret) {
pr_err("%s: cannot set dir to disp-te-gpios, %d\n",
__func__, ret);
return ret;
}
}
return 0;
}
static int dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *dsi)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
int ret;
msm_host->channel = dsi->channel;
msm_host->lanes = dsi->lanes;
msm_host->format = dsi->format;
msm_host->mode_flags = dsi->mode_flags;
msm_host->panel_node = dsi->dev.of_node;
/* Some gpios defined in panel DT need to be controlled by host */
ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
if (ret)
return ret;
DBG("id=%d", msm_host->id);
if (msm_host->dev)
drm_helper_hpd_irq_event(msm_host->dev);
return 0;
}
static int dsi_host_detach(struct mipi_dsi_host *host,
struct mipi_dsi_device *dsi)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
msm_host->panel_node = NULL;
DBG("id=%d", msm_host->id);
if (msm_host->dev)
drm_helper_hpd_irq_event(msm_host->dev);
return 0;
}
static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
int ret;
if (!msg || !msm_host->power_on)
return -EINVAL;
mutex_lock(&msm_host->cmd_mutex);
ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
mutex_unlock(&msm_host->cmd_mutex);
return ret;
}
static struct mipi_dsi_host_ops dsi_host_ops = {
.attach = dsi_host_attach,
.detach = dsi_host_detach,
.transfer = dsi_host_transfer,
};
int msm_dsi_host_init(struct msm_dsi *msm_dsi)
{
struct msm_dsi_host *msm_host = NULL;
struct platform_device *pdev = msm_dsi->pdev;
int ret;
msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
if (!msm_host) {
pr_err("%s: FAILED: cannot alloc dsi host\n",
__func__);
ret = -ENOMEM;
goto fail;
}
ret = of_property_read_u32(pdev->dev.of_node,
"qcom,dsi-host-index", &msm_host->id);
if (ret) {
dev_err(&pdev->dev,
"%s: host index not specified, ret=%d\n",
__func__, ret);
goto fail;
}
msm_host->pdev = pdev;
ret = dsi_clk_init(msm_host);
if (ret) {
pr_err("%s: unable to initialize dsi clks\n", __func__);
goto fail;
}
msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
if (IS_ERR(msm_host->ctrl_base)) {
pr_err("%s: unable to map Dsi ctrl base\n", __func__);
ret = PTR_ERR(msm_host->ctrl_base);
goto fail;
}
msm_host->cfg = dsi_get_config(msm_host);
if (!msm_host->cfg) {
ret = -EINVAL;
pr_err("%s: get config failed\n", __func__);
goto fail;
}
ret = dsi_regulator_init(msm_host);
if (ret) {
pr_err("%s: regulator init failed\n", __func__);
goto fail;
}
msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
if (!msm_host->rx_buf) {
pr_err("%s: alloc rx temp buf failed\n", __func__);
goto fail;
}
init_completion(&msm_host->dma_comp);
init_completion(&msm_host->video_comp);
mutex_init(&msm_host->dev_mutex);
mutex_init(&msm_host->cmd_mutex);
mutex_init(&msm_host->clk_mutex);
spin_lock_init(&msm_host->intr_lock);
/* setup workqueue */
msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
INIT_WORK(&msm_host->err_work, dsi_err_worker);
msm_dsi->phy = msm_dsi_phy_init(pdev, msm_host->cfg->phy_type,
msm_host->id);
if (!msm_dsi->phy) {
ret = -EINVAL;
pr_err("%s: phy init failed\n", __func__);
goto fail;
}
msm_dsi->host = &msm_host->base;
msm_dsi->id = msm_host->id;
DBG("Dsi Host %d initialized", msm_host->id);
return 0;
fail:
return ret;
}
void msm_dsi_host_destroy(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
DBG("");
dsi_tx_buf_free(msm_host);
if (msm_host->workqueue) {
flush_workqueue(msm_host->workqueue);
destroy_workqueue(msm_host->workqueue);
msm_host->workqueue = NULL;
}
mutex_destroy(&msm_host->clk_mutex);
mutex_destroy(&msm_host->cmd_mutex);
mutex_destroy(&msm_host->dev_mutex);
}
int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
struct drm_device *dev)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
struct platform_device *pdev = msm_host->pdev;
int ret;
msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
if (msm_host->irq < 0) {
ret = msm_host->irq;
dev_err(dev->dev, "failed to get irq: %d\n", ret);
return ret;
}
ret = devm_request_irq(&pdev->dev, msm_host->irq,
dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"dsi_isr", msm_host);
if (ret < 0) {
dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
msm_host->irq, ret);
return ret;
}
msm_host->dev = dev;
ret = dsi_tx_buf_alloc(msm_host, SZ_4K);
if (ret) {
pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
return ret;
}
return 0;
}
int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
struct device_node *node;
int ret;
/* Register mipi dsi host */
if (!msm_host->registered) {
host->dev = &msm_host->pdev->dev;
host->ops = &dsi_host_ops;
ret = mipi_dsi_host_register(host);
if (ret)
return ret;
msm_host->registered = true;
/* If the panel driver has not been probed after host register,
* we should defer the host's probe.
* It makes sure panel is connected when fbcon detects
* connector status and gets the proper display mode to
* create framebuffer.
*/
if (check_defer) {
node = of_get_child_by_name(msm_host->pdev->dev.of_node,
"panel");
if (node) {
if (!of_drm_find_panel(node))
return -EPROBE_DEFER;
}
}
}
return 0;
}
void msm_dsi_host_unregister(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
if (msm_host->registered) {
mipi_dsi_host_unregister(host);
host->dev = NULL;
host->ops = NULL;
msm_host->registered = false;
}
}
int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
/* TODO: make sure dsi_cmd_mdp is idle.
* Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
* to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
* How to handle the old versions? Wait for mdp cmd done?
*/
/*
* mdss interrupt is generated in mdp core clock domain
* mdp clock need to be enabled to receive dsi interrupt
*/
dsi_clk_ctrl(msm_host, 1);
/* TODO: vote for bus bandwidth */
if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
dsi_set_tx_power_mode(0, msm_host);
msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
dsi_write(msm_host, REG_DSI_CTRL,
msm_host->dma_cmd_ctrl_restore |
DSI_CTRL_CMD_MODE_EN |
DSI_CTRL_ENABLE);
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
return 0;
}
void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
dsi_set_tx_power_mode(1, msm_host);
/* TODO: unvote for bus bandwidth */
dsi_clk_ctrl(msm_host, 0);
}
int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
return dsi_cmds2buf_tx(msm_host, msg);
}
int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
int data_byte, rx_byte, dlen, end;
int short_response, diff, pkt_size, ret = 0;
char cmd;
int rlen = msg->rx_len;
u8 *buf;
if (rlen <= 2) {
short_response = 1;
pkt_size = rlen;
rx_byte = 4;
} else {
short_response = 0;
data_byte = 10; /* first read */
if (rlen < data_byte)
pkt_size = rlen;
else
pkt_size = data_byte;
rx_byte = data_byte + 6; /* 4 header + 2 crc */
}
buf = msm_host->rx_buf;
end = 0;
while (!end) {
u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
struct mipi_dsi_msg max_pkt_size_msg = {
.channel = msg->channel,
.type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
.tx_len = 2,
.tx_buf = tx,
};
DBG("rlen=%d pkt_size=%d rx_byte=%d",
rlen, pkt_size, rx_byte);
ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
if (ret < 2) {
pr_err("%s: Set max pkt size failed, %d\n",
__func__, ret);
return -EINVAL;
}
if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) &&
(msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
/* Clear the RDBK_DATA registers */
dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
DSI_RDBK_DATA_CTRL_CLR);
wmb(); /* make sure the RDBK registers are cleared */
dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
wmb(); /* release cleared status before transfer */
}
ret = dsi_cmds2buf_tx(msm_host, msg);
if (ret < msg->tx_len) {
pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
return ret;
}
/*
* once cmd_dma_done interrupt received,
* return data from client is ready and stored
* at RDBK_DATA register already
* since rx fifo is 16 bytes, dcs header is kept at first loop,
* after that dcs header lost during shift into registers
*/
dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
if (dlen <= 0)
return 0;
if (short_response)
break;
if (rlen <= data_byte) {
diff = data_byte - rlen;
end = 1;
} else {
diff = 0;
rlen -= data_byte;
}
if (!end) {
dlen -= 2; /* 2 crc */
dlen -= diff;
buf += dlen; /* next start position */
data_byte = 14; /* NOT first read */
if (rlen < data_byte)
pkt_size += rlen;
else
pkt_size += data_byte;
DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
}
}
/*
* For single Long read, if the requested rlen < 10,
* we need to shift the start position of rx
* data buffer to skip the bytes which are not
* updated.
*/
if (pkt_size < 10 && !short_response)
buf = msm_host->rx_buf + (10 - rlen);
else
buf = msm_host->rx_buf;
cmd = buf[0];
switch (cmd) {
case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
ret = 0;
break;
case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
ret = dsi_short_read1_resp(buf, msg);
break;
case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
ret = dsi_short_read2_resp(buf, msg);
break;
case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
ret = dsi_long_read_resp(buf, msg);
break;
default:
pr_warn("%s:Invalid response cmd\n", __func__);
ret = 0;
}
return ret;
}
void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 iova, u32 len)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
dsi_write(msm_host, REG_DSI_DMA_BASE, iova);
dsi_write(msm_host, REG_DSI_DMA_LEN, len);
dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
/* Make sure trigger happens */
wmb();
}
int msm_dsi_host_enable(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
dsi_op_mode_config(msm_host,
!!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
/* TODO: clock should be turned off for command mode,
* and only turned on before MDP START.
* This part of code should be enabled once mdp driver support it.
*/
/* if (msm_panel->mode == MSM_DSI_CMD_MODE)
dsi_clk_ctrl(msm_host, 0); */
return 0;
}
int msm_dsi_host_disable(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
dsi_op_mode_config(msm_host,
!!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
/* Since we have disabled INTF, the video engine won't stop so that
* the cmd engine will be blocked.
* Reset to disable video engine so that we can send off cmd.
*/
dsi_sw_reset(msm_host);
return 0;
}
int msm_dsi_host_power_on(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
u32 clk_pre = 0, clk_post = 0;
int ret = 0;
mutex_lock(&msm_host->dev_mutex);
if (msm_host->power_on) {
DBG("dsi host already on");
goto unlock_ret;
}
ret = dsi_calc_clk_rate(msm_host);
if (ret) {
pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
goto unlock_ret;
}
ret = dsi_host_regulator_enable(msm_host);
if (ret) {
pr_err("%s:Failed to enable vregs.ret=%d\n",
__func__, ret);
goto unlock_ret;
}
ret = dsi_bus_clk_enable(msm_host);
if (ret) {
pr_err("%s: failed to enable bus clocks, %d\n", __func__, ret);
goto fail_disable_reg;
}
dsi_phy_sw_reset(msm_host);
ret = msm_dsi_manager_phy_enable(msm_host->id,
msm_host->byte_clk_rate * 8,
clk_get_rate(msm_host->esc_clk),
&clk_pre, &clk_post);
dsi_bus_clk_disable(msm_host);
if (ret) {
pr_err("%s: failed to enable phy, %d\n", __func__, ret);
goto fail_disable_reg;
}
ret = dsi_clk_ctrl(msm_host, 1);
if (ret) {
pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret);
goto fail_disable_reg;
}
dsi_timing_setup(msm_host);
dsi_sw_reset(msm_host);
dsi_ctrl_config(msm_host, true, clk_pre, clk_post);
if (msm_host->disp_en_gpio)
gpiod_set_value(msm_host->disp_en_gpio, 1);
msm_host->power_on = true;
mutex_unlock(&msm_host->dev_mutex);
return 0;
fail_disable_reg:
dsi_host_regulator_disable(msm_host);
unlock_ret:
mutex_unlock(&msm_host->dev_mutex);
return ret;
}
int msm_dsi_host_power_off(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
mutex_lock(&msm_host->dev_mutex);
if (!msm_host->power_on) {
DBG("dsi host already off");
goto unlock_ret;
}
dsi_ctrl_config(msm_host, false, 0, 0);
if (msm_host->disp_en_gpio)
gpiod_set_value(msm_host->disp_en_gpio, 0);
msm_dsi_manager_phy_disable(msm_host->id);
dsi_clk_ctrl(msm_host, 0);
dsi_host_regulator_disable(msm_host);
DBG("-");
msm_host->power_on = false;
unlock_ret:
mutex_unlock(&msm_host->dev_mutex);
return 0;
}
int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
struct drm_display_mode *mode)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
if (msm_host->mode) {
drm_mode_destroy(msm_host->dev, msm_host->mode);
msm_host->mode = NULL;
}
msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
if (IS_ERR(msm_host->mode)) {
pr_err("%s: cannot duplicate mode\n", __func__);
return PTR_ERR(msm_host->mode);
}
return 0;
}
struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
unsigned long *panel_flags)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
struct drm_panel *panel;
panel = of_drm_find_panel(msm_host->panel_node);
if (panel_flags)
*panel_flags = msm_host->mode_flags;
return panel;
}