// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Analogix DP (Display port) core register interface driver.
*
* Copyright (C) 2012 Samsung Electronics Co., Ltd.
* Author: Jingoo Han <[email protected]>
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <drm/bridge/analogix_dp.h>
#include "analogix_dp_core.h"
#include "analogix_dp_reg.h"
#define COMMON_INT_MASK_1 0
#define COMMON_INT_MASK_2 0
#define COMMON_INT_MASK_3 0
#define COMMON_INT_MASK_4 (HOTPLUG_CHG | HPD_LOST | PLUG)
#define INT_STA_MASK INT_HPD
void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable)
{
u32 reg;
if (enable) {
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
reg |= HDCP_VIDEO_MUTE;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
} else {
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
reg &= ~HDCP_VIDEO_MUTE;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
}
}
void analogix_dp_stop_video(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
reg &= ~VIDEO_EN;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
}
void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable)
{
u32 reg;
if (enable)
reg = LANE3_MAP_LOGIC_LANE_0 | LANE2_MAP_LOGIC_LANE_1 |
LANE1_MAP_LOGIC_LANE_2 | LANE0_MAP_LOGIC_LANE_3;
else
reg = LANE3_MAP_LOGIC_LANE_3 | LANE2_MAP_LOGIC_LANE_2 |
LANE1_MAP_LOGIC_LANE_1 | LANE0_MAP_LOGIC_LANE_0;
writel(reg, dp->reg_base + ANALOGIX_DP_LANE_MAP);
}
void analogix_dp_init_analog_param(struct analogix_dp_device *dp)
{
u32 reg;
reg = TX_TERMINAL_CTRL_50_OHM;
writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_1);
reg = SEL_24M | TX_DVDD_BIT_1_0625V;
writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_2);
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
reg = REF_CLK_24M;
if (dp->plat_data->dev_type == RK3288_DP)
reg ^= REF_CLK_MASK;
writel(reg, dp->reg_base + ANALOGIX_DP_PLL_REG_1);
writel(0x95, dp->reg_base + ANALOGIX_DP_PLL_REG_2);
writel(0x40, dp->reg_base + ANALOGIX_DP_PLL_REG_3);
writel(0x58, dp->reg_base + ANALOGIX_DP_PLL_REG_4);
writel(0x22, dp->reg_base + ANALOGIX_DP_PLL_REG_5);
}
reg = DRIVE_DVDD_BIT_1_0625V | VCO_BIT_600_MICRO;
writel(reg, dp->reg_base + ANALOGIX_DP_ANALOG_CTL_3);
reg = PD_RING_OSC | AUX_TERMINAL_CTRL_50_OHM |
TX_CUR1_2X | TX_CUR_16_MA;
writel(reg, dp->reg_base + ANALOGIX_DP_PLL_FILTER_CTL_1);
reg = CH3_AMP_400_MV | CH2_AMP_400_MV |
CH1_AMP_400_MV | CH0_AMP_400_MV;
writel(reg, dp->reg_base + ANALOGIX_DP_TX_AMP_TUNING_CTL);
}
void analogix_dp_init_interrupt(struct analogix_dp_device *dp)
{
/* Set interrupt pin assertion polarity as high */
writel(INT_POL1 | INT_POL0, dp->reg_base + ANALOGIX_DP_INT_CTL);
/* Clear pending regisers */
writel(0xff, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
writel(0x4f, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_2);
writel(0xe0, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_3);
writel(0xe7, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
writel(0x63, dp->reg_base + ANALOGIX_DP_INT_STA);
/* 0:mask,1: unmask */
writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_1);
writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
writel(0x00, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
writel(0x00, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
}
void analogix_dp_reset(struct analogix_dp_device *dp)
{
u32 reg;
analogix_dp_stop_video(dp);
analogix_dp_enable_video_mute(dp, 0);
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
reg = RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N |
SW_FUNC_EN_N;
else
reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
HDCP_FUNC_EN_N | SW_FUNC_EN_N;
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
reg = SSC_FUNC_EN_N | AUX_FUNC_EN_N |
SERDES_FIFO_FUNC_EN_N |
LS_CLK_DOMAIN_FUNC_EN_N;
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
usleep_range(20, 30);
analogix_dp_lane_swap(dp, 0);
writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
writel(0x40, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
writel(0x0, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
writel(0x0, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
writel(0x0, dp->reg_base + ANALOGIX_DP_HDCP_CTL);
writel(0x5e, dp->reg_base + ANALOGIX_DP_HPD_DEGLITCH_L);
writel(0x1a, dp->reg_base + ANALOGIX_DP_HPD_DEGLITCH_H);
writel(0x10, dp->reg_base + ANALOGIX_DP_LINK_DEBUG_CTL);
writel(0x0, dp->reg_base + ANALOGIX_DP_PHY_TEST);
writel(0x0, dp->reg_base + ANALOGIX_DP_VIDEO_FIFO_THRD);
writel(0x20, dp->reg_base + ANALOGIX_DP_AUDIO_MARGIN);
writel(0x4, dp->reg_base + ANALOGIX_DP_M_VID_GEN_FILTER_TH);
writel(0x2, dp->reg_base + ANALOGIX_DP_M_AUD_GEN_FILTER_TH);
writel(0x00000101, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
}
void analogix_dp_swreset(struct analogix_dp_device *dp)
{
writel(RESET_DP_TX, dp->reg_base + ANALOGIX_DP_TX_SW_RESET);
}
void analogix_dp_config_interrupt(struct analogix_dp_device *dp)
{
u32 reg;
/* 0: mask, 1: unmask */
reg = COMMON_INT_MASK_1;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_1);
reg = COMMON_INT_MASK_2;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_2);
reg = COMMON_INT_MASK_3;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_3);
reg = COMMON_INT_MASK_4;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
reg = INT_STA_MASK;
writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
}
void analogix_dp_mute_hpd_interrupt(struct analogix_dp_device *dp)
{
u32 reg;
/* 0: mask, 1: unmask */
reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
reg &= ~COMMON_INT_MASK_4;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
reg &= ~INT_STA_MASK;
writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
}
void analogix_dp_unmute_hpd_interrupt(struct analogix_dp_device *dp)
{
u32 reg;
/* 0: mask, 1: unmask */
reg = COMMON_INT_MASK_4;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_MASK_4);
reg = INT_STA_MASK;
writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA_MASK);
}
int analogix_dp_wait_pll_locked(struct analogix_dp_device *dp)
{
u32 val;
return readl_poll_timeout(dp->reg_base + ANALOGIX_DP_DEBUG_CTL, val,
val & PLL_LOCK, 120,
120 * DP_TIMEOUT_LOOP_COUNT);
}
void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable)
{
u32 reg;
u32 mask = DP_PLL_PD;
u32 pd_addr = ANALOGIX_DP_PLL_CTL;
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
pd_addr = ANALOGIX_DP_PD;
mask = RK_PLL_PD;
}
reg = readl(dp->reg_base + pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + pd_addr);
}
void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp,
enum analog_power_block block,
bool enable)
{
u32 reg;
u32 phy_pd_addr = ANALOGIX_DP_PHY_PD;
u32 mask;
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
phy_pd_addr = ANALOGIX_DP_PD;
switch (block) {
case AUX_BLOCK:
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
mask = RK_AUX_PD;
else
mask = AUX_PD;
reg = readl(dp->reg_base + phy_pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + phy_pd_addr);
break;
case CH0_BLOCK:
mask = CH0_PD;
reg = readl(dp->reg_base + phy_pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + phy_pd_addr);
break;
case CH1_BLOCK:
mask = CH1_PD;
reg = readl(dp->reg_base + phy_pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + phy_pd_addr);
break;
case CH2_BLOCK:
mask = CH2_PD;
reg = readl(dp->reg_base + phy_pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + phy_pd_addr);
break;
case CH3_BLOCK:
mask = CH3_PD;
reg = readl(dp->reg_base + phy_pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + phy_pd_addr);
break;
case ANALOG_TOTAL:
/*
* There is no bit named DP_PHY_PD, so We used DP_INC_BG
* to power off everything instead of DP_PHY_PD in
* Rockchip
*/
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
mask = DP_INC_BG;
else
mask = DP_PHY_PD;
reg = readl(dp->reg_base + phy_pd_addr);
if (enable)
reg |= mask;
else
reg &= ~mask;
writel(reg, dp->reg_base + phy_pd_addr);
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
usleep_range(10, 15);
break;
case POWER_ALL:
if (enable) {
reg = DP_ALL_PD;
writel(reg, dp->reg_base + phy_pd_addr);
} else {
reg = DP_ALL_PD;
writel(reg, dp->reg_base + phy_pd_addr);
usleep_range(10, 15);
reg &= ~DP_INC_BG;
writel(reg, dp->reg_base + phy_pd_addr);
usleep_range(10, 15);
writel(0x00, dp->reg_base + phy_pd_addr);
}
break;
default:
break;
}
}
int analogix_dp_init_analog_func(struct analogix_dp_device *dp)
{
u32 reg;
analogix_dp_set_analog_power_down(dp, POWER_ALL, 0);
reg = PLL_LOCK_CHG;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
reg = readl(dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
reg &= ~(F_PLL_LOCK | PLL_LOCK_CTRL);
writel(reg, dp->reg_base + ANALOGIX_DP_DEBUG_CTL);
/* Power up PLL */
analogix_dp_set_pll_power_down(dp, 0);
/* Enable Serdes FIFO function and Link symbol clock domain module */
reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
| AUX_FUNC_EN_N);
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
return 0;
}
void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp)
{
u32 reg;
if (dp->hpd_gpiod)
return;
reg = HOTPLUG_CHG | HPD_LOST | PLUG;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
reg = INT_HPD;
writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA);
}
void analogix_dp_init_hpd(struct analogix_dp_device *dp)
{
u32 reg;
if (dp->hpd_gpiod)
return;
analogix_dp_clear_hotplug_interrupts(dp);
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
reg &= ~(F_HPD | HPD_CTRL);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
}
void analogix_dp_force_hpd(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
reg = (F_HPD | HPD_CTRL);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
}
enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp)
{
u32 reg;
if (dp->hpd_gpiod) {
reg = gpiod_get_value(dp->hpd_gpiod);
if (reg)
return DP_IRQ_TYPE_HP_CABLE_IN;
else
return DP_IRQ_TYPE_HP_CABLE_OUT;
} else {
/* Parse hotplug interrupt status register */
reg = readl(dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_4);
if (reg & PLUG)
return DP_IRQ_TYPE_HP_CABLE_IN;
if (reg & HPD_LOST)
return DP_IRQ_TYPE_HP_CABLE_OUT;
if (reg & HOTPLUG_CHG)
return DP_IRQ_TYPE_HP_CHANGE;
return DP_IRQ_TYPE_UNKNOWN;
}
}
void analogix_dp_reset_aux(struct analogix_dp_device *dp)
{
u32 reg;
/* Disable AUX channel module */
reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
reg |= AUX_FUNC_EN_N;
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
}
void analogix_dp_init_aux(struct analogix_dp_device *dp)
{
u32 reg;
/* Clear inerrupts related to AUX channel */
reg = RPLY_RECEIV | AUX_ERR;
writel(reg, dp->reg_base + ANALOGIX_DP_INT_STA);
analogix_dp_set_analog_power_down(dp, AUX_BLOCK, true);
usleep_range(10, 11);
analogix_dp_set_analog_power_down(dp, AUX_BLOCK, false);
analogix_dp_reset_aux(dp);
/* AUX_BIT_PERIOD_EXPECTED_DELAY doesn't apply to Rockchip IP */
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type))
reg = 0;
else
reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3);
/* Disable AUX transaction H/W retry */
reg |= AUX_HW_RETRY_COUNT_SEL(0) |
AUX_HW_RETRY_INTERVAL_600_MICROSECONDS;
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_HW_RETRY_CTL);
/* Receive AUX Channel DEFER commands equal to DEFFER_COUNT*64 */
reg = DEFER_CTRL_EN | DEFER_COUNT(1);
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_DEFER_CTL);
/* Enable AUX channel module */
reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
reg &= ~AUX_FUNC_EN_N;
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_2);
}
int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp)
{
u32 reg;
if (dp->hpd_gpiod) {
if (gpiod_get_value(dp->hpd_gpiod))
return 0;
} else {
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
if (reg & HPD_STATUS)
return 0;
}
return -EINVAL;
}
void analogix_dp_enable_sw_function(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
reg &= ~SW_FUNC_EN_N;
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
}
void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype)
{
u32 reg;
reg = bwtype;
if ((bwtype == DP_LINK_BW_2_7) || (bwtype == DP_LINK_BW_1_62))
writel(reg, dp->reg_base + ANALOGIX_DP_LINK_BW_SET);
}
void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_LINK_BW_SET);
*bwtype = reg;
}
void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count)
{
u32 reg;
reg = count;
writel(reg, dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET);
}
void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_LANE_COUNT_SET);
*count = reg;
}
void analogix_dp_set_lane_link_training(struct analogix_dp_device *dp)
{
u8 lane;
for (lane = 0; lane < dp->link_train.lane_count; lane++)
writel(dp->link_train.training_lane[lane],
dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL + 4 * lane);
}
u32 analogix_dp_get_lane_link_training(struct analogix_dp_device *dp, u8 lane)
{
return readl(dp->reg_base + ANALOGIX_DP_LN0_LINK_TRAINING_CTL + 4 * lane);
}
void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp,
bool enable)
{
u32 reg;
if (enable) {
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
reg |= ENHANCED;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
} else {
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
reg &= ~ENHANCED;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
}
}
void analogix_dp_set_training_pattern(struct analogix_dp_device *dp,
enum pattern_set pattern)
{
u32 reg;
switch (pattern) {
case PRBS7:
reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_PRBS7;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
break;
case D10_2:
reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_D10_2;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
break;
case TRAINING_PTN1:
reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN1;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
break;
case TRAINING_PTN2:
reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN2;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
break;
case DP_NONE:
reg = SCRAMBLING_ENABLE |
LINK_QUAL_PATTERN_SET_DISABLE |
SW_TRAINING_PATTERN_SET_NORMAL;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
break;
default:
break;
}
}
void analogix_dp_reset_macro(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_PHY_TEST);
reg |= MACRO_RST;
writel(reg, dp->reg_base + ANALOGIX_DP_PHY_TEST);
/* 10 us is the minimum reset time. */
usleep_range(10, 20);
reg &= ~MACRO_RST;
writel(reg, dp->reg_base + ANALOGIX_DP_PHY_TEST);
}
void analogix_dp_init_video(struct analogix_dp_device *dp)
{
u32 reg;
reg = VSYNC_DET | VID_FORMAT_CHG | VID_CLK_CHG;
writel(reg, dp->reg_base + ANALOGIX_DP_COMMON_INT_STA_1);
reg = 0x0;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
reg = CHA_CRI(4) | CHA_CTRL;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
reg = 0x0;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
reg = VID_HRES_TH(2) | VID_VRES_TH(0);
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_8);
}
void analogix_dp_set_video_color_format(struct analogix_dp_device *dp)
{
u32 reg;
/* Configure the input color depth, color space, dynamic range */
reg = (dp->video_info.dynamic_range << IN_D_RANGE_SHIFT) |
(dp->video_info.color_depth << IN_BPC_SHIFT) |
(dp->video_info.color_space << IN_COLOR_F_SHIFT);
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_2);
/* Set Input Color YCbCr Coefficients to ITU601 or ITU709 */
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
reg &= ~IN_YC_COEFFI_MASK;
if (dp->video_info.ycbcr_coeff)
reg |= IN_YC_COEFFI_ITU709;
else
reg |= IN_YC_COEFFI_ITU601;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
}
int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_1);
if (!(reg & DET_STA)) {
dev_dbg(dp->dev, "Input stream clock not detected.\n");
return -EINVAL;
}
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_2);
dev_dbg(dp->dev, "wait SYS_CTL_2.\n");
if (reg & CHA_STA) {
dev_dbg(dp->dev, "Input stream clk is changing\n");
return -EINVAL;
}
return 0;
}
void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp,
enum clock_recovery_m_value_type type,
u32 m_value, u32 n_value)
{
u32 reg;
if (type == REGISTER_M) {
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
reg |= FIX_M_VID;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
reg = m_value & 0xff;
writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_0);
reg = (m_value >> 8) & 0xff;
writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_1);
reg = (m_value >> 16) & 0xff;
writel(reg, dp->reg_base + ANALOGIX_DP_M_VID_2);
reg = n_value & 0xff;
writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_0);
reg = (n_value >> 8) & 0xff;
writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_1);
reg = (n_value >> 16) & 0xff;
writel(reg, dp->reg_base + ANALOGIX_DP_N_VID_2);
} else {
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
reg &= ~FIX_M_VID;
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_4);
writel(0x00, dp->reg_base + ANALOGIX_DP_N_VID_0);
writel(0x80, dp->reg_base + ANALOGIX_DP_N_VID_1);
writel(0x00, dp->reg_base + ANALOGIX_DP_N_VID_2);
}
}
void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type)
{
u32 reg;
if (type == VIDEO_TIMING_FROM_CAPTURE) {
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg &= ~FORMAT_SEL;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
} else {
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg |= FORMAT_SEL;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
}
}
void analogix_dp_enable_video_master(struct analogix_dp_device *dp, bool enable)
{
u32 reg;
if (enable) {
reg = readl(dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
reg &= ~VIDEO_MODE_MASK;
reg |= VIDEO_MASTER_MODE_EN | VIDEO_MODE_MASTER_MODE;
writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
} else {
reg = readl(dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
reg &= ~VIDEO_MODE_MASK;
reg |= VIDEO_MODE_SLAVE_MODE;
writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
}
}
void analogix_dp_start_video(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
reg |= VIDEO_EN;
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_1);
}
int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
writel(reg, dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
reg = readl(dp->reg_base + ANALOGIX_DP_SYS_CTL_3);
if (!(reg & STRM_VALID)) {
dev_dbg(dp->dev, "Input video stream is not detected.\n");
return -EINVAL;
}
return 0;
}
void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
if (dp->plat_data && is_rockchip(dp->plat_data->dev_type)) {
reg &= ~(RK_VID_CAP_FUNC_EN_N | RK_VID_FIFO_FUNC_EN_N);
} else {
reg &= ~(MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N);
reg |= MASTER_VID_FUNC_EN_N;
}
writel(reg, dp->reg_base + ANALOGIX_DP_FUNC_EN_1);
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg &= ~INTERACE_SCAN_CFG;
reg |= (dp->video_info.interlaced << 2);
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg &= ~VSYNC_POLARITY_CFG;
reg |= (dp->video_info.v_sync_polarity << 1);
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg &= ~HSYNC_POLARITY_CFG;
reg |= (dp->video_info.h_sync_polarity << 0);
writel(reg, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_10);
reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
writel(reg, dp->reg_base + ANALOGIX_DP_SOC_GENERAL_CTL);
}
void analogix_dp_enable_scrambling(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
reg &= ~SCRAMBLING_DISABLE;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
}
void analogix_dp_disable_scrambling(struct analogix_dp_device *dp)
{
u32 reg;
reg = readl(dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
reg |= SCRAMBLING_DISABLE;
writel(reg, dp->reg_base + ANALOGIX_DP_TRAINING_PTN_SET);
}
void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp)
{
writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON);
}
static ssize_t analogix_dp_get_psr_status(struct analogix_dp_device *dp)
{
ssize_t val;
u8 status;
val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &status);
if (val < 0) {
dev_err(dp->dev, "PSR_STATUS read failed ret=%zd", val);
return val;
}
return status;
}
int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
struct dp_sdp *vsc, bool blocking)
{
unsigned int val;
int ret;
ssize_t psr_status;
/* don't send info frame */
val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
val &= ~IF_EN;
writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
/* configure single frame update mode */
writel(PSR_FRAME_UP_TYPE_BURST | PSR_CRC_SEL_HARDWARE,
dp->reg_base + ANALOGIX_DP_PSR_FRAME_UPDATE_CTRL);
/* configure VSC HB0~HB3 */
writel(vsc->sdp_header.HB0, dp->reg_base + ANALOGIX_DP_SPD_HB0);
writel(vsc->sdp_header.HB1, dp->reg_base + ANALOGIX_DP_SPD_HB1);
writel(vsc->sdp_header.HB2, dp->reg_base + ANALOGIX_DP_SPD_HB2);
writel(vsc->sdp_header.HB3, dp->reg_base + ANALOGIX_DP_SPD_HB3);
/* configure reused VSC PB0~PB3, magic number from vendor */
writel(0x00, dp->reg_base + ANALOGIX_DP_SPD_PB0);
writel(0x16, dp->reg_base + ANALOGIX_DP_SPD_PB1);
writel(0xCE, dp->reg_base + ANALOGIX_DP_SPD_PB2);
writel(0x5D, dp->reg_base + ANALOGIX_DP_SPD_PB3);
/* configure DB0 / DB1 values */
writel(vsc->db[0], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB0);
writel(vsc->db[1], dp->reg_base + ANALOGIX_DP_VSC_SHADOW_DB1);
/* set reuse spd inforframe */
val = readl(dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
val |= REUSE_SPD_EN;
writel(val, dp->reg_base + ANALOGIX_DP_VIDEO_CTL_3);
/* mark info frame update */
val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
val = (val | IF_UP) & ~IF_EN;
writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
/* send info frame */
val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
val |= IF_EN;
writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
if (!blocking)
return 0;
/*
* db[1]!=0: entering PSR, wait for fully active remote frame buffer.
* db[1]==0: exiting PSR, wait for either
* (a) ACTIVE_RESYNC - the sink "must display the
* incoming active frames from the Source device with no visible
* glitches and/or artifacts", even though timings may still be
* re-synchronizing; or
* (b) INACTIVE - the transition is fully complete.
*/
ret = readx_poll_timeout(analogix_dp_get_psr_status, dp, psr_status,
psr_status >= 0 &&
((vsc->db[1] && psr_status == DP_PSR_SINK_ACTIVE_RFB) ||
(!vsc->db[1] && (psr_status == DP_PSR_SINK_ACTIVE_RESYNC ||
psr_status == DP_PSR_SINK_INACTIVE))),
1500, DP_TIMEOUT_PSR_LOOP_MS * 1000);
if (ret) {
dev_warn(dp->dev, "Failed to apply PSR %d\n", ret);
return ret;
}
return 0;
}
ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
struct drm_dp_aux_msg *msg)
{
u32 reg;
u8 *buffer = msg->buffer;
unsigned int i;
int ret;
/* Buffer size of AUX CH is 16 bytes */
if (WARN_ON(msg->size > 16))
return -E2BIG;
/* Clear AUX CH data buffer */
reg = BUF_CLR;
writel(reg, dp->reg_base + ANALOGIX_DP_BUFFER_DATA_CTL);
switch (msg->request & ~DP_AUX_I2C_MOT) {
case DP_AUX_I2C_WRITE:
reg = AUX_TX_COMM_WRITE | AUX_TX_COMM_I2C_TRANSACTION;
if (msg->request & DP_AUX_I2C_MOT)
reg |= AUX_TX_COMM_MOT;
break;
case DP_AUX_I2C_READ:
reg = AUX_TX_COMM_READ | AUX_TX_COMM_I2C_TRANSACTION;
if (msg->request & DP_AUX_I2C_MOT)
reg |= AUX_TX_COMM_MOT;
break;
case DP_AUX_NATIVE_WRITE:
reg = AUX_TX_COMM_WRITE | AUX_TX_COMM_DP_TRANSACTION;
break;
case DP_AUX_NATIVE_READ:
reg = AUX_TX_COMM_READ | AUX_TX_COMM_DP_TRANSACTION;
break;
default:
return -EINVAL;
}
reg |= AUX_LENGTH(msg->size);
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_1);
/* Select DPCD device address */
reg = AUX_ADDR_7_0(msg->address);
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_7_0);
reg = AUX_ADDR_15_8(msg->address);
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_15_8);
reg = AUX_ADDR_19_16(msg->address);
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_ADDR_19_16);
if (!(msg->request & DP_AUX_I2C_READ)) {
for (i = 0; i < msg->size; i++) {
reg = buffer[i];
writel(reg, dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
4 * i);
}
}
/* Enable AUX CH operation */
reg = AUX_EN;
/* Zero-sized messages specify address-only transactions. */
if (msg->size < 1)
reg |= ADDR_ONLY;
writel(reg, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2);
ret = readx_poll_timeout(readl, dp->reg_base + ANALOGIX_DP_AUX_CH_CTL_2,
reg, !(reg & AUX_EN), 25, 500 * 1000);
if (ret) {
dev_err(dp->dev, "AUX CH enable timeout!\n");
goto aux_error;
}
/* TODO: Wait for an interrupt instead of looping? */
/* Is AUX CH command reply received? */
ret = readx_poll_timeout(readl, dp->reg_base + ANALOGIX_DP_INT_STA,
reg, reg & RPLY_RECEIV, 10, 20 * 1000);
if (ret) {
dev_err(dp->dev, "AUX CH cmd reply timeout!\n");
goto aux_error;
}
/* Clear interrupt source for AUX CH command reply */
writel(RPLY_RECEIV, dp->reg_base + ANALOGIX_DP_INT_STA);
/* Clear interrupt source for AUX CH access error */
reg = readl(dp->reg_base + ANALOGIX_DP_INT_STA);
if ((reg & AUX_ERR)) {
u32 aux_status = readl(dp->reg_base + ANALOGIX_DP_AUX_CH_STA) &
AUX_STATUS_MASK;
writel(AUX_ERR, dp->reg_base + ANALOGIX_DP_INT_STA);
if (aux_status == AUX_STATUS_TIMEOUT_ERROR)
return -ETIMEDOUT;
dev_warn(dp->dev, "AUX CH error happened: %#x (%d)\n",
aux_status, !!(reg & AUX_ERR));
goto aux_error;
}
if (msg->request & DP_AUX_I2C_READ) {
for (i = 0; i < msg->size; i++) {
reg = readl(dp->reg_base + ANALOGIX_DP_BUF_DATA_0 +
4 * i);
buffer[i] = (unsigned char)reg;
}
}
/* Check if Rx sends defer */
reg = readl(dp->reg_base + ANALOGIX_DP_AUX_RX_COMM);
if (reg == AUX_RX_COMM_AUX_DEFER)
msg->reply = DP_AUX_NATIVE_REPLY_DEFER;
else if (reg == AUX_RX_COMM_I2C_DEFER)
msg->reply = DP_AUX_I2C_REPLY_DEFER;
else if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_WRITE ||
(msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_I2C_READ)
msg->reply = DP_AUX_I2C_REPLY_ACK;
else if ((msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_WRITE ||
(msg->request & ~DP_AUX_I2C_MOT) == DP_AUX_NATIVE_READ)
msg->reply = DP_AUX_NATIVE_REPLY_ACK;
return msg->size;
aux_error:
/* if aux err happen, reset aux */
analogix_dp_init_aux(dp);
return -EREMOTEIO;
}
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