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kernel/drivers/gpu/drm/bridge/analogix/anx7625.c

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init repo.
2024-07-22 17:22:30 +08:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright(c) 2020, Analogix Semiconductor. All rights reserved.
*
*/
#include <linux/gcd.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/workqueue.h>
#include <linux/of_gpio.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <video/display_timing.h>
#include "anx7625.h"
/*
* There is a sync issue while access I2C register between AP(CPU) and
* internal firmware(OCM), to avoid the race condition, AP should access
* the reserved slave address before slave address occurs changes.
*/
static int i2c_access_workaround(struct anx7625_data *ctx,
struct i2c_client *client)
{
u8 offset;
struct device *dev = &client->dev;
int ret;
if (client == ctx->last_client)
return 0;
ctx->last_client = client;
if (client == ctx->i2c.tcpc_client)
offset = RSVD_00_ADDR;
else if (client == ctx->i2c.tx_p0_client)
offset = RSVD_D1_ADDR;
else if (client == ctx->i2c.tx_p1_client)
offset = RSVD_60_ADDR;
else if (client == ctx->i2c.rx_p0_client)
offset = RSVD_39_ADDR;
else if (client == ctx->i2c.rx_p1_client)
offset = RSVD_7F_ADDR;
else
offset = RSVD_00_ADDR;
ret = i2c_smbus_write_byte_data(client, offset, 0x00);
if (ret < 0)
DRM_DEV_ERROR(dev,
"fail to access i2c id=%x\n:%x",
client->addr, offset);
return ret;
}
static int anx7625_reg_read(struct anx7625_data *ctx,
struct i2c_client *client, u8 reg_addr)
{
int ret;
struct device *dev = &client->dev;
i2c_access_workaround(ctx, client);
ret = i2c_smbus_read_byte_data(client, reg_addr);
if (ret < 0)
DRM_DEV_ERROR(dev, "read i2c fail id=%x:%x\n",
client->addr, reg_addr);
return ret;
}
static int anx7625_reg_block_read(struct anx7625_data *ctx,
struct i2c_client *client,
u8 reg_addr, u8 len, u8 *buf)
{
int ret;
struct device *dev = &client->dev;
i2c_access_workaround(ctx, client);
ret = i2c_smbus_read_i2c_block_data(client, reg_addr, len, buf);
if (ret < 0)
DRM_DEV_ERROR(dev, "read i2c block fail id=%x:%x\n",
client->addr, reg_addr);
return ret;
}
static int anx7625_reg_write(struct anx7625_data *ctx,
struct i2c_client *client,
u8 reg_addr, u8 reg_val)
{
int ret;
struct device *dev = &client->dev;
i2c_access_workaround(ctx, client);
ret = i2c_smbus_write_byte_data(client, reg_addr, reg_val);
if (ret < 0)
DRM_DEV_ERROR(dev, "fail to write i2c id=%x\n:%x",
client->addr, reg_addr);
return ret;
}
static int anx7625_write_or(struct anx7625_data *ctx,
struct i2c_client *client,
u8 offset, u8 mask)
{
int val;
val = anx7625_reg_read(ctx, client, offset);
if (val < 0)
return val;
return anx7625_reg_write(ctx, client, offset, (val | (mask)));
}
static int anx7625_write_and(struct anx7625_data *ctx,
struct i2c_client *client,
u8 offset, u8 mask)
{
int val;
val = anx7625_reg_read(ctx, client, offset);
if (val < 0)
return val;
return anx7625_reg_write(ctx, client, offset, (val & (mask)));
}
static int anx7625_write_and_or(struct anx7625_data *ctx,
struct i2c_client *client,
u8 offset, u8 and_mask, u8 or_mask)
{
int val;
val = anx7625_reg_read(ctx, client, offset);
if (val < 0)
return val;
return anx7625_reg_write(ctx, client,
offset, (val & and_mask) | (or_mask));
}
static int anx7625_read_ctrl_status_p0(struct anx7625_data *ctx)
{
return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_CTRL_STATUS);
}
static int wait_aux_op_finish(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int val;
int ret;
ret = readx_poll_timeout(anx7625_read_ctrl_status_p0,
ctx, val,
(!(val & AP_AUX_CTRL_OP_EN) || (val < 0)),
2000,
2000 * 150);
if (ret) {
DRM_DEV_ERROR(dev, "aux operation fail!\n");
return -EIO;
}
val = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
AP_AUX_CTRL_STATUS);
if (val < 0 || (val & 0x0F)) {
DRM_DEV_ERROR(dev, "aux status %02x\n", val);
val = -EIO;
}
return val;
}
static int anx7625_video_mute_control(struct anx7625_data *ctx,
u8 status)
{
int ret;
if (status) {
/* Set mute on flag */
ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, AP_MIPI_MUTE);
/* Clear mipi RX en */
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, (u8)~AP_MIPI_RX_EN);
} else {
/* Mute off flag */
ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
/* Set MIPI RX EN */
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, AP_MIPI_RX_EN);
}
return ret;
}
static int anx7625_config_audio_input(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int ret;
/* Channel num */
ret = anx7625_reg_write(ctx, ctx->i2c.tx_p2_client,
AUDIO_CHANNEL_STATUS_6, I2S_CH_2 << 5);
/* FS */
ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
AUDIO_CHANNEL_STATUS_4,
0xf0, AUDIO_FS_48K);
/* Word length */
ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
AUDIO_CHANNEL_STATUS_5,
0xf0, AUDIO_W_LEN_24_24MAX);
/* I2S */
ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
AUDIO_CHANNEL_STATUS_6, I2S_SLAVE_MODE);
ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
AUDIO_CONTROL_REGISTER, ~TDM_TIMING_MODE);
/* Audio change flag */
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, AP_AUDIO_CHG);
if (ret < 0)
DRM_DEV_ERROR(dev, "fail to config audio.\n");
return ret;
}
/* Reduction of fraction a/b */
static void anx7625_reduction_of_a_fraction(unsigned long *a, unsigned long *b)
{
unsigned long gcd_num;
unsigned long tmp_a, tmp_b;
u32 i = 1;
gcd_num = gcd(*a, *b);
*a /= gcd_num;
*b /= gcd_num;
tmp_a = *a;
tmp_b = *b;
while ((*a > MAX_UNSIGNED_24BIT) || (*b > MAX_UNSIGNED_24BIT)) {
i++;
*a = tmp_a / i;
*b = tmp_b / i;
}
/*
* In the end, make a, b larger to have higher ODFC PLL
* output frequency accuracy
*/
while ((*a < MAX_UNSIGNED_24BIT) && (*b < MAX_UNSIGNED_24BIT)) {
*a <<= 1;
*b <<= 1;
}
*a >>= 1;
*b >>= 1;
}
static int anx7625_calculate_m_n(u32 pixelclock,
unsigned long *m,
unsigned long *n,
u8 *post_divider)
{
if (pixelclock > PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN) {
/* Pixel clock frequency is too high */
DRM_ERROR("pixelclock too high, act(%d), maximum(%lu)\n",
pixelclock,
PLL_OUT_FREQ_ABS_MAX / POST_DIVIDER_MIN);
return -EINVAL;
}
if (pixelclock < PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX) {
/* Pixel clock frequency is too low */
DRM_ERROR("pixelclock too low, act(%d), maximum(%lu)\n",
pixelclock,
PLL_OUT_FREQ_ABS_MIN / POST_DIVIDER_MAX);
return -EINVAL;
}
for (*post_divider = 1;
pixelclock < (PLL_OUT_FREQ_MIN / (*post_divider));)
*post_divider += 1;
if (*post_divider > POST_DIVIDER_MAX) {
for (*post_divider = 1;
(pixelclock <
(PLL_OUT_FREQ_ABS_MIN / (*post_divider)));)
*post_divider += 1;
if (*post_divider > POST_DIVIDER_MAX) {
DRM_ERROR("cannot find property post_divider(%d)\n",
*post_divider);
return -EDOM;
}
}
/* Patch to improve the accuracy */
if (*post_divider == 7) {
/* 27,000,000 is not divisible by 7 */
*post_divider = 8;
} else if (*post_divider == 11) {
/* 27,000,000 is not divisible by 11 */
*post_divider = 12;
} else if ((*post_divider == 13) || (*post_divider == 14)) {
/* 27,000,000 is not divisible by 13 or 14 */
*post_divider = 15;
}
if (pixelclock * (*post_divider) > PLL_OUT_FREQ_ABS_MAX) {
DRM_ERROR("act clock(%u) large than maximum(%lu)\n",
pixelclock * (*post_divider),
PLL_OUT_FREQ_ABS_MAX);
return -EDOM;
}
*m = pixelclock;
*n = XTAL_FRQ / (*post_divider);
anx7625_reduction_of_a_fraction(m, n);
return 0;
}
static int anx7625_odfc_config(struct anx7625_data *ctx,
u8 post_divider)
{
int ret;
struct device *dev = &ctx->client->dev;
/* Config input reference clock frequency 27MHz/19.2MHz */
ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
~(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_16,
(REF_CLK_27000KHZ << MIPI_FREF_D_IND));
/* Post divider */
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
MIPI_DIGITAL_PLL_8, 0x0f);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_8,
post_divider << 4);
/* Add patch for MIS2-125 (5pcs ANX7625 fail ATE MBIST test) */
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
~MIPI_PLL_VCO_TUNE_REG_VAL);
/* Reset ODFC PLL */
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
~MIPI_PLL_RESET_N);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_7,
MIPI_PLL_RESET_N);
if (ret < 0)
DRM_DEV_ERROR(dev, "IO error.\n");
return ret;
}
/*
* The MIPI source video data exist large variation (e.g. 59Hz ~ 61Hz),
* anx7625 defined K ratio for matching MIPI input video clock and
* DP output video clock. Increase K value can match bigger video data
* variation. IVO panel has small variation than DP CTS spec, need
* decrease the K value.
*/
static int anx7625_set_k_value(struct anx7625_data *ctx)
{
struct edid *edid = (struct edid *)ctx->slimport_edid_p.edid_raw_data;
if (edid->mfg_id[0] == IVO_MID0 && edid->mfg_id[1] == IVO_MID1)
return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_DIGITAL_ADJ_1, 0x3B);
return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_DIGITAL_ADJ_1, 0x3D);
}
static int anx7625_dsi_video_timing_config(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
unsigned long m, n;
u16 htotal;
int ret;
u8 post_divider = 0;
ret = anx7625_calculate_m_n(ctx->dt.pixelclock.min * 1000,
&m, &n, &post_divider);
if (ret) {
DRM_DEV_ERROR(dev, "cannot get property m n value.\n");
return ret;
}
DRM_DEV_DEBUG_DRIVER(dev, "compute M(%lu), N(%lu), divider(%d).\n",
m, n, post_divider);
/* Configure pixel clock */
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_L,
(ctx->dt.pixelclock.min / 1000) & 0xFF);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, PIXEL_CLOCK_H,
(ctx->dt.pixelclock.min / 1000) >> 8);
/* Lane count */
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p1_client,
MIPI_LANE_CTRL_0, 0xfc);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client,
MIPI_LANE_CTRL_0, 3);
/* Htotal */
htotal = ctx->dt.hactive.min + ctx->dt.hfront_porch.min +
ctx->dt.hback_porch.min + ctx->dt.hsync_len.min;
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_TOTAL_PIXELS_L, htotal & 0xFF);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_TOTAL_PIXELS_H, htotal >> 8);
/* Hactive */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_ACTIVE_PIXELS_L, ctx->dt.hactive.min & 0xFF);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_ACTIVE_PIXELS_H, ctx->dt.hactive.min >> 8);
/* HFP */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_FRONT_PORCH_L, ctx->dt.hfront_porch.min);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_FRONT_PORCH_H,
ctx->dt.hfront_porch.min >> 8);
/* HWS */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_SYNC_WIDTH_L, ctx->dt.hsync_len.min);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_SYNC_WIDTH_H, ctx->dt.hsync_len.min >> 8);
/* HBP */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_BACK_PORCH_L, ctx->dt.hback_porch.min);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
HORIZONTAL_BACK_PORCH_H, ctx->dt.hback_porch.min >> 8);
/* Vactive */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_L,
ctx->dt.vactive.min);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client, ACTIVE_LINES_H,
ctx->dt.vactive.min >> 8);
/* VFP */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
VERTICAL_FRONT_PORCH, ctx->dt.vfront_porch.min);
/* VWS */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
VERTICAL_SYNC_WIDTH, ctx->dt.vsync_len.min);
/* VBP */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p2_client,
VERTICAL_BACK_PORCH, ctx->dt.vback_porch.min);
/* M value */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_PLL_M_NUM_23_16, (m >> 16) & 0xff);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_PLL_M_NUM_15_8, (m >> 8) & 0xff);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_PLL_M_NUM_7_0, (m & 0xff));
/* N value */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_PLL_N_NUM_23_16, (n >> 16) & 0xff);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_PLL_N_NUM_15_8, (n >> 8) & 0xff);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_PLL_N_NUM_7_0,
(n & 0xff));
anx7625_set_k_value(ctx);
ret |= anx7625_odfc_config(ctx, post_divider - 1);
if (ret < 0)
DRM_DEV_ERROR(dev, "mipi dsi setup IO error.\n");
return ret;
}
static int anx7625_swap_dsi_lane3(struct anx7625_data *ctx)
{
int val;
struct device *dev = &ctx->client->dev;
/* Swap MIPI-DSI data lane 3 P and N */
val = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP);
if (val < 0) {
DRM_DEV_ERROR(dev, "IO error : access MIPI_SWAP.\n");
return -EIO;
}
val |= (1 << MIPI_SWAP_CH3);
return anx7625_reg_write(ctx, ctx->i2c.rx_p1_client, MIPI_SWAP, val);
}
static int anx7625_api_dsi_config(struct anx7625_data *ctx)
{
int val, ret;
struct device *dev = &ctx->client->dev;
/* Swap MIPI-DSI data lane 3 P and N */
ret = anx7625_swap_dsi_lane3(ctx);
if (ret < 0) {
DRM_DEV_ERROR(dev, "IO error : swap dsi lane 3 fail.\n");
return ret;
}
/* DSI clock settings */
val = (0 << MIPI_HS_PWD_CLK) |
(0 << MIPI_HS_RT_CLK) |
(0 << MIPI_PD_CLK) |
(1 << MIPI_CLK_RT_MANUAL_PD_EN) |
(1 << MIPI_CLK_HS_MANUAL_PD_EN) |
(0 << MIPI_CLK_DET_DET_BYPASS) |
(0 << MIPI_CLK_MISS_CTRL) |
(0 << MIPI_PD_LPTX_CH_MANUAL_PD_EN);
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_PHY_CONTROL_3, val);
/*
* Decreased HS prepare timing delay from 160ns to 80ns work with
* a) Dragon board 810 series (Qualcomm AP)
* b) Moving Pixel DSI source (PG3A pattern generator +
* P332 D-PHY Probe) default D-PHY timing
* 5ns/step
*/
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_TIME_HS_PRPR, 0x10);
/* Enable DSI mode*/
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_18,
SELECT_DSI << MIPI_DPI_SELECT);
ret |= anx7625_dsi_video_timing_config(ctx);
if (ret < 0) {
DRM_DEV_ERROR(dev, "dsi video timing config fail\n");
return ret;
}
/* Toggle m, n ready */
ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
~(MIPI_M_NUM_READY | MIPI_N_NUM_READY));
usleep_range(1000, 1100);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, MIPI_DIGITAL_PLL_6,
MIPI_M_NUM_READY | MIPI_N_NUM_READY);
/* Configure integer stable register */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_VIDEO_STABLE_CNT, 0x02);
/* Power on MIPI RX */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_LANE_CTRL_10, 0x00);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p1_client,
MIPI_LANE_CTRL_10, 0x80);
if (ret < 0)
DRM_DEV_ERROR(dev, "IO error : mipi dsi enable init fail.\n");
return ret;
}
static int anx7625_dsi_config(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int ret;
DRM_DEV_DEBUG_DRIVER(dev, "config dsi.\n");
/* DSC disable */
ret = anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
R_DSC_CTRL_0, ~DSC_EN);
ret |= anx7625_api_dsi_config(ctx);
if (ret < 0) {
DRM_DEV_ERROR(dev, "IO error : api dsi config error.\n");
return ret;
}
/* Set MIPI RX EN */
ret = anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, AP_MIPI_RX_EN);
/* Clear mute flag */
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, (u8)~AP_MIPI_MUTE);
if (ret < 0)
DRM_DEV_ERROR(dev, "IO error : enable mipi rx fail.\n");
else
DRM_DEV_DEBUG_DRIVER(dev, "success to config DSI\n");
return ret;
}
static void anx7625_dp_start(struct anx7625_data *ctx)
{
int ret;
struct device *dev = &ctx->client->dev;
if (!ctx->display_timing_valid) {
DRM_DEV_ERROR(dev, "mipi not set display timing yet.\n");
return;
}
anx7625_config_audio_input(ctx);
ret = anx7625_dsi_config(ctx);
if (ret < 0)
DRM_DEV_ERROR(dev, "MIPI phy setup error.\n");
}
static void anx7625_dp_stop(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int ret;
DRM_DEV_DEBUG_DRIVER(dev, "stop dp output\n");
/*
* Video disable: 0x72:08 bit 7 = 0;
* Audio disable: 0x70:87 bit 0 = 0;
*/
ret = anx7625_write_and(ctx, ctx->i2c.tx_p0_client, 0x87, 0xfe);
ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, 0x08, 0x7f);
ret |= anx7625_video_mute_control(ctx, 1);
if (ret < 0)
DRM_DEV_ERROR(dev, "IO error : mute video fail\n");
}
static int sp_tx_rst_aux(struct anx7625_data *ctx)
{
int ret;
ret = anx7625_write_or(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
AUX_RST);
ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client, RST_CTRL2,
~AUX_RST);
return ret;
}
static int sp_tx_aux_wr(struct anx7625_data *ctx, u8 offset)
{
int ret;
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_BUFF_START, offset);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_COMMAND, 0x04);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
return (ret | wait_aux_op_finish(ctx));
}
static int sp_tx_aux_rd(struct anx7625_data *ctx, u8 len_cmd)
{
int ret;
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_COMMAND, len_cmd);
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p0_client,
AP_AUX_CTRL_STATUS, AP_AUX_CTRL_OP_EN);
return (ret | wait_aux_op_finish(ctx));
}
static int sp_tx_get_edid_block(struct anx7625_data *ctx)
{
int c = 0;
struct device *dev = &ctx->client->dev;
sp_tx_aux_wr(ctx, 0x7e);
sp_tx_aux_rd(ctx, 0x01);
c = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, AP_AUX_BUFF_START);
if (c < 0) {
DRM_DEV_ERROR(dev, "IO error : access AUX BUFF.\n");
return -EIO;
}
DRM_DEV_DEBUG_DRIVER(dev, " EDID Block = %d\n", c + 1);
if (c > MAX_EDID_BLOCK)
c = 1;
return c;
}
static int edid_read(struct anx7625_data *ctx,
u8 offset, u8 *pblock_buf)
{
int ret, cnt;
struct device *dev = &ctx->client->dev;
for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
sp_tx_aux_wr(ctx, offset);
/* Set I2C read com 0x01 mot = 0 and read 16 bytes */
ret = sp_tx_aux_rd(ctx, 0xf1);
if (ret) {
ret = sp_tx_rst_aux(ctx);
DRM_DEV_DEBUG_DRIVER(dev, "edid read fail, reset!\n");
} else {
ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
AP_AUX_BUFF_START,
MAX_DPCD_BUFFER_SIZE,
pblock_buf);
if (ret > 0)
break;
}
}
if (cnt > EDID_TRY_CNT)
return -EIO;
return ret;
}
static int segments_edid_read(struct anx7625_data *ctx,
u8 segment, u8 *buf, u8 offset)
{
u8 cnt;
int ret;
struct device *dev = &ctx->client->dev;
/* Write address only */
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_ADDR_7_0, 0x30);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_COMMAND, 0x04);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_CTRL_STATUS,
AP_AUX_CTRL_ADDRONLY | AP_AUX_CTRL_OP_EN);
ret |= wait_aux_op_finish(ctx);
/* Write segment address */
ret |= sp_tx_aux_wr(ctx, segment);
/* Data read */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_ADDR_7_0, 0x50);
if (ret) {
DRM_DEV_ERROR(dev, "IO error : aux initial fail.\n");
return ret;
}
for (cnt = 0; cnt <= EDID_TRY_CNT; cnt++) {
sp_tx_aux_wr(ctx, offset);
/* Set I2C read com 0x01 mot = 0 and read 16 bytes */
ret = sp_tx_aux_rd(ctx, 0xf1);
if (ret) {
ret = sp_tx_rst_aux(ctx);
DRM_DEV_ERROR(dev, "segment read fail, reset!\n");
} else {
ret = anx7625_reg_block_read(ctx, ctx->i2c.rx_p0_client,
AP_AUX_BUFF_START,
MAX_DPCD_BUFFER_SIZE, buf);
if (ret > 0)
break;
}
}
if (cnt > EDID_TRY_CNT)
return -EIO;
return ret;
}
static int sp_tx_edid_read(struct anx7625_data *ctx,
u8 *pedid_blocks_buf)
{
u8 offset;
int edid_pos;
int count, blocks_num;
u8 pblock_buf[MAX_DPCD_BUFFER_SIZE];
u8 i, j;
int g_edid_break = 0;
int ret;
struct device *dev = &ctx->client->dev;
/* Address initial */
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_ADDR_7_0, 0x50);
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AUX_ADDR_15_8, 0);
ret |= anx7625_write_and(ctx, ctx->i2c.rx_p0_client,
AP_AUX_ADDR_19_16, 0xf0);
if (ret < 0) {
DRM_DEV_ERROR(dev, "access aux channel IO error.\n");
return -EIO;
}
blocks_num = sp_tx_get_edid_block(ctx);
if (blocks_num < 0)
return blocks_num;
count = 0;
do {
switch (count) {
case 0:
case 1:
for (i = 0; i < 8; i++) {
offset = (i + count * 8) * MAX_DPCD_BUFFER_SIZE;
g_edid_break = edid_read(ctx, offset,
pblock_buf);
if (g_edid_break < 0)
break;
memcpy(&pedid_blocks_buf[offset],
pblock_buf,
MAX_DPCD_BUFFER_SIZE);
}
break;
case 2:
offset = 0x00;
for (j = 0; j < 8; j++) {
edid_pos = (j + count * 8) *
MAX_DPCD_BUFFER_SIZE;
if (g_edid_break == 1)
break;
segments_edid_read(ctx, count / 2,
pblock_buf, offset);
memcpy(&pedid_blocks_buf[edid_pos],
pblock_buf,
MAX_DPCD_BUFFER_SIZE);
offset = offset + 0x10;
}
break;
case 3:
offset = 0x80;
for (j = 0; j < 8; j++) {
edid_pos = (j + count * 8) *
MAX_DPCD_BUFFER_SIZE;
if (g_edid_break == 1)
break;
segments_edid_read(ctx, count / 2,
pblock_buf, offset);
memcpy(&pedid_blocks_buf[edid_pos],
pblock_buf,
MAX_DPCD_BUFFER_SIZE);
offset = offset + 0x10;
}
break;
default:
break;
}
count++;
} while (blocks_num >= count);
/* Check edid data */
if (!drm_edid_is_valid((struct edid *)pedid_blocks_buf)) {
DRM_DEV_ERROR(dev, "WARNING! edid check fail!\n");
return -EINVAL;
}
/* Reset aux channel */
ret = sp_tx_rst_aux(ctx);
if (ret < 0) {
DRM_DEV_ERROR(dev, "Failed to reset aux channel!\n");
return ret;
}
return (blocks_num + 1);
}
static void anx7625_power_on(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int ret, i;
if (!ctx->pdata.low_power_mode) {
DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
return;
}
for (i = 0; i < ARRAY_SIZE(ctx->pdata.supplies); i++) {
ret = regulator_enable(ctx->pdata.supplies[i].consumer);
if (ret < 0) {
DRM_DEV_DEBUG_DRIVER(dev, "cannot enable supply %d: %d\n",
i, ret);
goto reg_err;
}
usleep_range(2000, 2100);
}
usleep_range(11000, 12000);
/* Power on pin enable */
gpiod_set_value(ctx->pdata.gpio_p_on, 1);
usleep_range(10000, 11000);
/* Power reset pin enable */
gpiod_set_value(ctx->pdata.gpio_reset, 1);
usleep_range(10000, 11000);
DRM_DEV_DEBUG_DRIVER(dev, "power on !\n");
return;
reg_err:
for (--i; i >= 0; i--)
regulator_disable(ctx->pdata.supplies[i].consumer);
}
static void anx7625_power_standby(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int ret;
if (!ctx->pdata.low_power_mode) {
DRM_DEV_DEBUG_DRIVER(dev, "not low power mode!\n");
return;
}
gpiod_set_value(ctx->pdata.gpio_reset, 0);
usleep_range(1000, 1100);
gpiod_set_value(ctx->pdata.gpio_p_on, 0);
usleep_range(1000, 1100);
ret = regulator_bulk_disable(ARRAY_SIZE(ctx->pdata.supplies),
ctx->pdata.supplies);
if (ret < 0)
DRM_DEV_DEBUG_DRIVER(dev, "cannot disable supplies %d\n", ret);
DRM_DEV_DEBUG_DRIVER(dev, "power down\n");
}
/* Basic configurations of ANX7625 */
static void anx7625_config(struct anx7625_data *ctx)
{
anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
XTAL_FRQ_SEL, XTAL_FRQ_27M);
}
static void anx7625_disable_pd_protocol(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
int ret;
/* Reset main ocm */
ret = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x40);
/* Disable PD */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
AP_AV_STATUS, AP_DISABLE_PD);
/* Release main ocm */
ret |= anx7625_reg_write(ctx, ctx->i2c.rx_p0_client, 0x88, 0x00);
if (ret < 0)
DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature fail.\n");
else
DRM_DEV_DEBUG_DRIVER(dev, "disable PD feature succeeded.\n");
}
static int anx7625_ocm_loading_check(struct anx7625_data *ctx)
{
int ret;
struct device *dev = &ctx->client->dev;
/* Check interface workable */
ret = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
FLASH_LOAD_STA);
if (ret < 0) {
DRM_DEV_ERROR(dev, "IO error : access flash load.\n");
return ret;
}
if ((ret & FLASH_LOAD_STA_CHK) != FLASH_LOAD_STA_CHK)
return -ENODEV;
anx7625_disable_pd_protocol(ctx);
DRM_DEV_DEBUG_DRIVER(dev, "Firmware ver %02x%02x,",
anx7625_reg_read(ctx,
ctx->i2c.rx_p0_client,
OCM_FW_VERSION),
anx7625_reg_read(ctx,
ctx->i2c.rx_p0_client,
OCM_FW_REVERSION));
DRM_DEV_DEBUG_DRIVER(dev, "Driver version %s\n",
ANX7625_DRV_VERSION);
return 0;
}
static void anx7625_power_on_init(struct anx7625_data *ctx)
{
int retry_count, i;
for (retry_count = 0; retry_count < 3; retry_count++) {
anx7625_power_on(ctx);
anx7625_config(ctx);
for (i = 0; i < OCM_LOADING_TIME; i++) {
if (!anx7625_ocm_loading_check(ctx))
return;
usleep_range(1000, 1100);
}
anx7625_power_standby(ctx);
}
}
static void anx7625_init_gpio(struct anx7625_data *platform)
{
struct device *dev = &platform->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "init gpio\n");
/* Gpio for chip power enable */
platform->pdata.gpio_p_on =
devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
/* Gpio for chip reset */
platform->pdata.gpio_reset =
devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (platform->pdata.gpio_p_on && platform->pdata.gpio_reset) {
platform->pdata.low_power_mode = 1;
DRM_DEV_DEBUG_DRIVER(dev, "low power mode, pon %d, reset %d.\n",
desc_to_gpio(platform->pdata.gpio_p_on),
desc_to_gpio(platform->pdata.gpio_reset));
} else {
platform->pdata.low_power_mode = 0;
DRM_DEV_DEBUG_DRIVER(dev, "not low power mode.\n");
}
}
static void anx7625_stop_dp_work(struct anx7625_data *ctx)
{
ctx->hpd_status = 0;
ctx->hpd_high_cnt = 0;
ctx->display_timing_valid = 0;
}
static void anx7625_start_dp_work(struct anx7625_data *ctx)
{
int ret;
struct device *dev = &ctx->client->dev;
if (ctx->hpd_high_cnt >= 2) {
DRM_DEV_DEBUG_DRIVER(dev, "filter useless HPD\n");
return;
}
ctx->hpd_high_cnt++;
/* Not support HDCP */
ret = anx7625_write_and(ctx, ctx->i2c.rx_p1_client, 0xee, 0x9f);
/* Try auth flag */
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xec, 0x10);
/* Interrupt for DRM */
ret |= anx7625_write_or(ctx, ctx->i2c.rx_p1_client, 0xff, 0x01);
if (ret < 0)
return;
ret = anx7625_reg_read(ctx, ctx->i2c.rx_p1_client, 0x86);
if (ret < 0)
return;
DRM_DEV_DEBUG_DRIVER(dev, "Secure OCM version=%02x\n", ret);
}
static int anx7625_read_hpd_status_p0(struct anx7625_data *ctx)
{
return anx7625_reg_read(ctx, ctx->i2c.rx_p0_client, SYSTEM_STSTUS);
}
static void anx7625_hpd_polling(struct anx7625_data *ctx)
{
int ret, val;
struct device *dev = &ctx->client->dev;
ret = readx_poll_timeout(anx7625_read_hpd_status_p0,
ctx, val,
((val & HPD_STATUS) || (val < 0)),
5000,
5000 * 100);
if (ret) {
DRM_DEV_ERROR(dev, "no hpd.\n");
return;
}
DRM_DEV_DEBUG_DRIVER(dev, "system status: 0x%x. HPD raise up.\n", val);
anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
INTR_ALERT_1, 0xFF);
anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
INTERFACE_CHANGE_INT, 0);
anx7625_start_dp_work(ctx);
if (!ctx->pdata.panel_bridge && ctx->bridge_attached)
drm_helper_hpd_irq_event(ctx->bridge.dev);
}
static void anx7625_remove_edid(struct anx7625_data *ctx)
{
ctx->slimport_edid_p.edid_block_num = -1;
}
static void dp_hpd_change_handler(struct anx7625_data *ctx, bool on)
{
struct device *dev = &ctx->client->dev;
/* HPD changed */
DRM_DEV_DEBUG_DRIVER(dev, "dp_hpd_change_default_func: %d\n",
(u32)on);
if (on == 0) {
DRM_DEV_DEBUG_DRIVER(dev, " HPD low\n");
anx7625_remove_edid(ctx);
anx7625_stop_dp_work(ctx);
} else {
DRM_DEV_DEBUG_DRIVER(dev, " HPD high\n");
anx7625_start_dp_work(ctx);
}
ctx->hpd_status = 1;
}
static int anx7625_hpd_change_detect(struct anx7625_data *ctx)
{
int intr_vector, status;
struct device *dev = &ctx->client->dev;
status = anx7625_reg_write(ctx, ctx->i2c.tcpc_client,
INTR_ALERT_1, 0xFF);
if (status < 0) {
DRM_DEV_ERROR(dev, "cannot clear alert reg.\n");
return status;
}
intr_vector = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
INTERFACE_CHANGE_INT);
if (intr_vector < 0) {
DRM_DEV_ERROR(dev, "cannot access interrupt change reg.\n");
return intr_vector;
}
DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x44=%x\n", intr_vector);
status = anx7625_reg_write(ctx, ctx->i2c.rx_p0_client,
INTERFACE_CHANGE_INT,
intr_vector & (~intr_vector));
if (status < 0) {
DRM_DEV_ERROR(dev, "cannot clear interrupt change reg.\n");
return status;
}
if (!(intr_vector & HPD_STATUS_CHANGE))
return -ENOENT;
status = anx7625_reg_read(ctx, ctx->i2c.rx_p0_client,
SYSTEM_STSTUS);
if (status < 0) {
DRM_DEV_ERROR(dev, "cannot clear interrupt status.\n");
return status;
}
DRM_DEV_DEBUG_DRIVER(dev, "0x7e:0x45=%x\n", status);
dp_hpd_change_handler(ctx, status & HPD_STATUS);
return 0;
}
static void anx7625_work_func(struct work_struct *work)
{
int event;
struct anx7625_data *ctx = container_of(work,
struct anx7625_data, work);
mutex_lock(&ctx->lock);
if (pm_runtime_suspended(&ctx->client->dev))
goto unlock;
event = anx7625_hpd_change_detect(ctx);
if (event < 0)
goto unlock;
if (ctx->bridge_attached)
drm_helper_hpd_irq_event(ctx->bridge.dev);
unlock:
mutex_unlock(&ctx->lock);
}
static irqreturn_t anx7625_intr_hpd_isr(int irq, void *data)
{
struct anx7625_data *ctx = (struct anx7625_data *)data;
queue_work(ctx->workqueue, &ctx->work);
return IRQ_HANDLED;
}
static int anx7625_parse_dt(struct device *dev,
struct anx7625_platform_data *pdata)
{
struct device_node *np = dev->of_node;
struct drm_panel *panel;
int ret;
pdata->mipi_host_node = of_graph_get_remote_node(np, 0, 0);
if (!pdata->mipi_host_node) {
DRM_DEV_ERROR(dev, "fail to get internal panel.\n");
return -ENODEV;
}
DRM_DEV_DEBUG_DRIVER(dev, "found dsi host node.\n");
ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL);
if (ret < 0) {
if (ret == -ENODEV)
return 0;
return ret;
}
if (!panel)
return -ENODEV;
pdata->panel_bridge = devm_drm_panel_bridge_add(dev, panel);
if (IS_ERR(pdata->panel_bridge))
return PTR_ERR(pdata->panel_bridge);
DRM_DEV_DEBUG_DRIVER(dev, "get panel node.\n");
return 0;
}
static inline struct anx7625_data *bridge_to_anx7625(struct drm_bridge *bridge)
{
return container_of(bridge, struct anx7625_data, bridge);
}
static struct edid *anx7625_get_edid(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
struct s_edid_data *p_edid = &ctx->slimport_edid_p;
int edid_num;
u8 *edid;
edid = kmalloc(FOUR_BLOCK_SIZE, GFP_KERNEL);
if (!edid) {
DRM_DEV_ERROR(dev, "Fail to allocate buffer\n");
return NULL;
}
if (ctx->slimport_edid_p.edid_block_num > 0) {
memcpy(edid, ctx->slimport_edid_p.edid_raw_data,
FOUR_BLOCK_SIZE);
return (struct edid *)edid;
}
pm_runtime_get_sync(dev);
edid_num = sp_tx_edid_read(ctx, p_edid->edid_raw_data);
pm_runtime_put_sync(dev);
if (edid_num < 1) {
DRM_DEV_ERROR(dev, "Fail to read EDID: %d\n", edid_num);
kfree(edid);
return NULL;
}
p_edid->edid_block_num = edid_num;
memcpy(edid, ctx->slimport_edid_p.edid_raw_data, FOUR_BLOCK_SIZE);
return (struct edid *)edid;
}
static enum drm_connector_status anx7625_sink_detect(struct anx7625_data *ctx)
{
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "sink detect, return connected\n");
return connector_status_connected;
}
static int anx7625_attach_dsi(struct anx7625_data *ctx)
{
struct mipi_dsi_device *dsi;
struct device *dev = &ctx->client->dev;
struct mipi_dsi_host *host;
const struct mipi_dsi_device_info info = {
.type = "anx7625",
.channel = 0,
.node = NULL,
};
DRM_DEV_DEBUG_DRIVER(dev, "attach dsi\n");
host = of_find_mipi_dsi_host_by_node(ctx->pdata.mipi_host_node);
if (!host) {
DRM_DEV_ERROR(dev, "fail to find dsi host.\n");
return -EINVAL;
}
dsi = mipi_dsi_device_register_full(host, &info);
if (IS_ERR(dsi)) {
DRM_DEV_ERROR(dev, "fail to create dsi device.\n");
return -EINVAL;
}
dsi->lanes = 4;
dsi->format = MIPI_DSI_FMT_RGB888;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
MIPI_DSI_MODE_NO_EOT_PACKET |
MIPI_DSI_MODE_VIDEO_HSE;
if (mipi_dsi_attach(dsi) < 0) {
DRM_DEV_ERROR(dev, "fail to attach dsi to host.\n");
mipi_dsi_device_unregister(dsi);
return -EINVAL;
}
ctx->dsi = dsi;
DRM_DEV_DEBUG_DRIVER(dev, "attach dsi succeeded.\n");
return 0;
}
static void anx7625_bridge_detach(struct drm_bridge *bridge)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
if (ctx->dsi) {
mipi_dsi_detach(ctx->dsi);
mipi_dsi_device_unregister(ctx->dsi);
}
}
static int anx7625_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
int err;
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm attach\n");
if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
return -EINVAL;
if (!bridge->encoder) {
DRM_DEV_ERROR(dev, "Parent encoder object not found");
return -ENODEV;
}
err = anx7625_attach_dsi(ctx);
if (err) {
DRM_DEV_ERROR(dev, "Fail to attach to dsi : %d\n", err);
return err;
}
if (ctx->pdata.panel_bridge) {
err = drm_bridge_attach(bridge->encoder,
ctx->pdata.panel_bridge,
&ctx->bridge, flags);
if (err)
return err;
}
ctx->bridge_attached = 1;
return 0;
}
static enum drm_mode_status
anx7625_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm mode checking\n");
/* Max 1200p at 5.4 Ghz, one lane, pixel clock 300M */
if (mode->clock > SUPPORT_PIXEL_CLOCK) {
DRM_DEV_DEBUG_DRIVER(dev,
"drm mode invalid, pixelclock too high.\n");
return MODE_CLOCK_HIGH;
}
DRM_DEV_DEBUG_DRIVER(dev, "drm mode valid.\n");
return MODE_OK;
}
static void anx7625_bridge_mode_set(struct drm_bridge *bridge,
const struct drm_display_mode *old_mode,
const struct drm_display_mode *mode)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm mode set\n");
ctx->dt.pixelclock.min = mode->clock;
ctx->dt.hactive.min = mode->hdisplay;
ctx->dt.hsync_len.min = mode->hsync_end - mode->hsync_start;
ctx->dt.hfront_porch.min = mode->hsync_start - mode->hdisplay;
ctx->dt.hback_porch.min = mode->htotal - mode->hsync_end;
ctx->dt.vactive.min = mode->vdisplay;
ctx->dt.vsync_len.min = mode->vsync_end - mode->vsync_start;
ctx->dt.vfront_porch.min = mode->vsync_start - mode->vdisplay;
ctx->dt.vback_porch.min = mode->vtotal - mode->vsync_end;
ctx->display_timing_valid = 1;
DRM_DEV_DEBUG_DRIVER(dev, "pixelclock(%d).\n", ctx->dt.pixelclock.min);
DRM_DEV_DEBUG_DRIVER(dev, "hactive(%d), hsync(%d), hfp(%d), hbp(%d)\n",
ctx->dt.hactive.min,
ctx->dt.hsync_len.min,
ctx->dt.hfront_porch.min,
ctx->dt.hback_porch.min);
DRM_DEV_DEBUG_DRIVER(dev, "vactive(%d), vsync(%d), vfp(%d), vbp(%d)\n",
ctx->dt.vactive.min,
ctx->dt.vsync_len.min,
ctx->dt.vfront_porch.min,
ctx->dt.vback_porch.min);
DRM_DEV_DEBUG_DRIVER(dev, "hdisplay(%d),hsync_start(%d).\n",
mode->hdisplay,
mode->hsync_start);
DRM_DEV_DEBUG_DRIVER(dev, "hsync_end(%d),htotal(%d).\n",
mode->hsync_end,
mode->htotal);
DRM_DEV_DEBUG_DRIVER(dev, "vdisplay(%d),vsync_start(%d).\n",
mode->vdisplay,
mode->vsync_start);
DRM_DEV_DEBUG_DRIVER(dev, "vsync_end(%d),vtotal(%d).\n",
mode->vsync_end,
mode->vtotal);
}
static bool anx7625_bridge_mode_fixup(struct drm_bridge *bridge,
const struct drm_display_mode *mode,
struct drm_display_mode *adj)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
u32 hsync, hfp, hbp, hblanking;
u32 adj_hsync, adj_hfp, adj_hbp, adj_hblanking, delta_adj;
u32 vref, adj_clock;
DRM_DEV_DEBUG_DRIVER(dev, "drm mode fixup set\n");
hsync = mode->hsync_end - mode->hsync_start;
hfp = mode->hsync_start - mode->hdisplay;
hbp = mode->htotal - mode->hsync_end;
hblanking = mode->htotal - mode->hdisplay;
DRM_DEV_DEBUG_DRIVER(dev, "before mode fixup\n");
DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
hsync, hfp, hbp, adj->clock);
DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
adj->hsync_start, adj->hsync_end, adj->htotal);
adj_hfp = hfp;
adj_hsync = hsync;
adj_hbp = hbp;
adj_hblanking = hblanking;
/* HFP needs to be even */
if (hfp & 0x1) {
adj_hfp += 1;
adj_hblanking += 1;
}
/* HBP needs to be even */
if (hbp & 0x1) {
adj_hbp -= 1;
adj_hblanking -= 1;
}
/* HSYNC needs to be even */
if (hsync & 0x1) {
if (adj_hblanking < hblanking)
adj_hsync += 1;
else
adj_hsync -= 1;
}
/*
* Once illegal timing detected, use default HFP, HSYNC, HBP
* This adjusting made for built-in eDP panel, for the externel
* DP monitor, may need return false.
*/
if (hblanking < HBLANKING_MIN || (hfp < HP_MIN && hbp < HP_MIN)) {
adj_hsync = SYNC_LEN_DEF;
adj_hfp = HFP_HBP_DEF;
adj_hbp = HFP_HBP_DEF;
vref = adj->clock * 1000 / (adj->htotal * adj->vtotal);
if (hblanking < HBLANKING_MIN) {
delta_adj = HBLANKING_MIN - hblanking;
adj_clock = vref * delta_adj * adj->vtotal;
adj->clock += DIV_ROUND_UP(adj_clock, 1000);
} else {
delta_adj = hblanking - HBLANKING_MIN;
adj_clock = vref * delta_adj * adj->vtotal;
adj->clock -= DIV_ROUND_UP(adj_clock, 1000);
}
DRM_WARN("illegal hblanking timing, use default.\n");
DRM_WARN("hfp(%d), hbp(%d), hsync(%d).\n", hfp, hbp, hsync);
} else if (adj_hfp < HP_MIN) {
/* Adjust hfp if hfp less than HP_MIN */
delta_adj = HP_MIN - adj_hfp;
adj_hfp = HP_MIN;
/*
* Balance total HBlanking pixel, if HBP does not have enough
* space, adjust HSYNC length, otherwise adjust HBP
*/
if ((adj_hbp - delta_adj) < HP_MIN)
/* HBP not enough space */
adj_hsync -= delta_adj;
else
adj_hbp -= delta_adj;
} else if (adj_hbp < HP_MIN) {
delta_adj = HP_MIN - adj_hbp;
adj_hbp = HP_MIN;
/*
* Balance total HBlanking pixel, if HBP hasn't enough space,
* adjust HSYNC length, otherwize adjust HBP
*/
if ((adj_hfp - delta_adj) < HP_MIN)
/* HFP not enough space */
adj_hsync -= delta_adj;
else
adj_hfp -= delta_adj;
}
DRM_DEV_DEBUG_DRIVER(dev, "after mode fixup\n");
DRM_DEV_DEBUG_DRIVER(dev, "hsync(%d), hfp(%d), hbp(%d), clock(%d)\n",
adj_hsync, adj_hfp, adj_hbp, adj->clock);
/* Reconstruct timing */
adj->hsync_start = adj->hdisplay + adj_hfp;
adj->hsync_end = adj->hsync_start + adj_hsync;
adj->htotal = adj->hsync_end + adj_hbp;
DRM_DEV_DEBUG_DRIVER(dev, "hsync_start(%d), hsync_end(%d), htot(%d)\n",
adj->hsync_start, adj->hsync_end, adj->htotal);
return true;
}
static void anx7625_bridge_enable(struct drm_bridge *bridge)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm enable\n");
pm_runtime_get_sync(dev);
anx7625_dp_start(ctx);
}
static void anx7625_bridge_disable(struct drm_bridge *bridge)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm disable\n");
anx7625_dp_stop(ctx);
pm_runtime_put_sync(dev);
}
static enum drm_connector_status
anx7625_bridge_detect(struct drm_bridge *bridge)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm bridge detect\n");
return anx7625_sink_detect(ctx);
}
static struct edid *anx7625_bridge_get_edid(struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct anx7625_data *ctx = bridge_to_anx7625(bridge);
struct device *dev = &ctx->client->dev;
DRM_DEV_DEBUG_DRIVER(dev, "drm bridge get edid\n");
return anx7625_get_edid(ctx);
}
static const struct drm_bridge_funcs anx7625_bridge_funcs = {
.attach = anx7625_bridge_attach,
.detach = anx7625_bridge_detach,
.disable = anx7625_bridge_disable,
.mode_valid = anx7625_bridge_mode_valid,
.mode_set = anx7625_bridge_mode_set,
.mode_fixup = anx7625_bridge_mode_fixup,
.enable = anx7625_bridge_enable,
.detect = anx7625_bridge_detect,
.get_edid = anx7625_bridge_get_edid,
};
static int anx7625_register_i2c_dummy_clients(struct anx7625_data *ctx,
struct i2c_client *client)
{
ctx->i2c.tx_p0_client = i2c_new_dummy_device(client->adapter,
TX_P0_ADDR >> 1);
if (!ctx->i2c.tx_p0_client)
return -ENOMEM;
ctx->i2c.tx_p1_client = i2c_new_dummy_device(client->adapter,
TX_P1_ADDR >> 1);
if (!ctx->i2c.tx_p1_client)
goto free_tx_p0;
ctx->i2c.tx_p2_client = i2c_new_dummy_device(client->adapter,
TX_P2_ADDR >> 1);
if (!ctx->i2c.tx_p2_client)
goto free_tx_p1;
ctx->i2c.rx_p0_client = i2c_new_dummy_device(client->adapter,
RX_P0_ADDR >> 1);
if (!ctx->i2c.rx_p0_client)
goto free_tx_p2;
ctx->i2c.rx_p1_client = i2c_new_dummy_device(client->adapter,
RX_P1_ADDR >> 1);
if (!ctx->i2c.rx_p1_client)
goto free_rx_p0;
ctx->i2c.rx_p2_client = i2c_new_dummy_device(client->adapter,
RX_P2_ADDR >> 1);
if (!ctx->i2c.rx_p2_client)
goto free_rx_p1;
ctx->i2c.tcpc_client = i2c_new_dummy_device(client->adapter,
TCPC_INTERFACE_ADDR >> 1);
if (!ctx->i2c.tcpc_client)
goto free_rx_p2;
return 0;
free_rx_p2:
i2c_unregister_device(ctx->i2c.rx_p2_client);
free_rx_p1:
i2c_unregister_device(ctx->i2c.rx_p1_client);
free_rx_p0:
i2c_unregister_device(ctx->i2c.rx_p0_client);
free_tx_p2:
i2c_unregister_device(ctx->i2c.tx_p2_client);
free_tx_p1:
i2c_unregister_device(ctx->i2c.tx_p1_client);
free_tx_p0:
i2c_unregister_device(ctx->i2c.tx_p0_client);
return -ENOMEM;
}
static void anx7625_unregister_i2c_dummy_clients(struct anx7625_data *ctx)
{
i2c_unregister_device(ctx->i2c.tx_p0_client);
i2c_unregister_device(ctx->i2c.tx_p1_client);
i2c_unregister_device(ctx->i2c.tx_p2_client);
i2c_unregister_device(ctx->i2c.rx_p0_client);
i2c_unregister_device(ctx->i2c.rx_p1_client);
i2c_unregister_device(ctx->i2c.rx_p2_client);
i2c_unregister_device(ctx->i2c.tcpc_client);
}
static int __maybe_unused anx7625_runtime_pm_suspend(struct device *dev)
{
struct anx7625_data *ctx = dev_get_drvdata(dev);
mutex_lock(&ctx->lock);
anx7625_stop_dp_work(ctx);
anx7625_power_standby(ctx);
mutex_unlock(&ctx->lock);
return 0;
}
static int __maybe_unused anx7625_runtime_pm_resume(struct device *dev)
{
struct anx7625_data *ctx = dev_get_drvdata(dev);
mutex_lock(&ctx->lock);
anx7625_power_on_init(ctx);
anx7625_hpd_polling(ctx);
mutex_unlock(&ctx->lock);
return 0;
}
static int __maybe_unused anx7625_resume(struct device *dev)
{
struct anx7625_data *ctx = dev_get_drvdata(dev);
if (!ctx->pdata.intp_irq)
return 0;
if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
enable_irq(ctx->pdata.intp_irq);
anx7625_runtime_pm_resume(dev);
}
return 0;
}
static int __maybe_unused anx7625_suspend(struct device *dev)
{
struct anx7625_data *ctx = dev_get_drvdata(dev);
if (!ctx->pdata.intp_irq)
return 0;
if (!pm_runtime_enabled(dev) || !pm_runtime_suspended(dev)) {
anx7625_runtime_pm_suspend(dev);
disable_irq(ctx->pdata.intp_irq);
}
return 0;
}
static const struct dev_pm_ops anx7625_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(anx7625_suspend, anx7625_resume)
SET_RUNTIME_PM_OPS(anx7625_runtime_pm_suspend,
anx7625_runtime_pm_resume, NULL)
};
static int anx7625_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct anx7625_data *platform;
struct anx7625_platform_data *pdata;
int ret = 0;
struct device *dev = &client->dev;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_I2C_BLOCK)) {
DRM_DEV_ERROR(dev, "anx7625's i2c bus doesn't support\n");
return -ENODEV;
}
platform = kzalloc(sizeof(*platform), GFP_KERNEL);
if (!platform) {
DRM_DEV_ERROR(dev, "fail to allocate driver data\n");
return -ENOMEM;
}
pdata = &platform->pdata;
ret = anx7625_parse_dt(dev, pdata);
if (ret) {
if (ret != -EPROBE_DEFER)
DRM_DEV_ERROR(dev, "fail to parse DT : %d\n", ret);
goto free_platform;
}
platform->client = client;
i2c_set_clientdata(client, platform);
pdata->supplies[0].supply = "vdd10";
pdata->supplies[1].supply = "vdd18";
pdata->supplies[2].supply = "vdd33";
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(pdata->supplies),
pdata->supplies);
if (ret) {
DRM_DEV_ERROR(dev, "fail to get power supplies: %d\n", ret);
return ret;
}
anx7625_init_gpio(platform);
mutex_init(&platform->lock);
platform->pdata.intp_irq = client->irq;
if (platform->pdata.intp_irq) {
INIT_WORK(&platform->work, anx7625_work_func);
platform->workqueue = alloc_workqueue("anx7625_work",
WQ_FREEZABLE | WQ_MEM_RECLAIM, 1);
if (!platform->workqueue) {
DRM_DEV_ERROR(dev, "fail to create work queue\n");
ret = -ENOMEM;
goto free_platform;
}
ret = devm_request_threaded_irq(dev, platform->pdata.intp_irq,
NULL, anx7625_intr_hpd_isr,
IRQF_TRIGGER_FALLING |
IRQF_ONESHOT,
"anx7625-intp", platform);
if (ret) {
DRM_DEV_ERROR(dev, "fail to request irq\n");
goto free_wq;
}
}
if (anx7625_register_i2c_dummy_clients(platform, client) != 0) {
ret = -ENOMEM;
DRM_DEV_ERROR(dev, "fail to reserve I2C bus.\n");
goto free_wq;
}
pm_runtime_enable(dev);
if (!platform->pdata.low_power_mode) {
anx7625_disable_pd_protocol(platform);
pm_runtime_get_sync(dev);
}
/* Add work function */
if (platform->pdata.intp_irq)
queue_work(platform->workqueue, &platform->work);
platform->bridge.funcs = &anx7625_bridge_funcs;
platform->bridge.of_node = client->dev.of_node;
platform->bridge.ops = DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
platform->bridge.type = DRM_MODE_CONNECTOR_eDP;
drm_bridge_add(&platform->bridge);
DRM_DEV_DEBUG_DRIVER(dev, "probe done\n");
return 0;
free_wq:
if (platform->workqueue)
destroy_workqueue(platform->workqueue);
free_platform:
kfree(platform);
return ret;
}
static int anx7625_i2c_remove(struct i2c_client *client)
{
struct anx7625_data *platform = i2c_get_clientdata(client);
drm_bridge_remove(&platform->bridge);
if (platform->pdata.intp_irq)
destroy_workqueue(platform->workqueue);
if (!platform->pdata.low_power_mode)
pm_runtime_put_sync_suspend(&client->dev);
anx7625_unregister_i2c_dummy_clients(platform);
kfree(platform);
return 0;
}
static const struct i2c_device_id anx7625_id[] = {
{"anx7625", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, anx7625_id);
static const struct of_device_id anx_match_table[] = {
{.compatible = "analogix,anx7625",},
{},
};
MODULE_DEVICE_TABLE(of, anx_match_table);
static struct i2c_driver anx7625_driver = {
.driver = {
.name = "anx7625",
.of_match_table = anx_match_table,
.pm = &anx7625_pm_ops,
},
.probe = anx7625_i2c_probe,
.remove = anx7625_i2c_remove,
.id_table = anx7625_id,
};
module_i2c_driver(anx7625_driver);
MODULE_DESCRIPTION("MIPI2DP anx7625 driver");
MODULE_AUTHOR("Xin Ji <xji@analogixsemi.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION(ANX7625_DRV_VERSION);
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