1174 lines
29 KiB
C
1174 lines
29 KiB
C
/*
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* Samsung DP (Display port) register interface driver.
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*
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* Copyright (C) 2012 Samsung Electronics Co., Ltd.
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* Author: Jingoo Han <jg1.han@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/delay.h>
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#include <video/exynos_dp.h>
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#include <plat/cpu.h>
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#include "exynos_dp_core.h"
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#include "exynos_dp_reg.h"
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#define COMMON_INT_MASK_1 (0)
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#define COMMON_INT_MASK_2 (0)
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#define COMMON_INT_MASK_3 (0)
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#define COMMON_INT_MASK_4 (0)
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#define INT_STA_MASK (0)
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void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable)
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{
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u32 reg;
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
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reg |= HDCP_VIDEO_MUTE;
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writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
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reg &= ~HDCP_VIDEO_MUTE;
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writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
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}
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}
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void exynos_dp_stop_video(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
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reg &= ~VIDEO_EN;
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writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
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}
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void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable)
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{
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u32 reg;
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if (enable)
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reg = LANE3_MAP_LOGIC_LANE_0 | LANE2_MAP_LOGIC_LANE_1 |
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LANE1_MAP_LOGIC_LANE_2 | LANE0_MAP_LOGIC_LANE_3;
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else
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reg = LANE3_MAP_LOGIC_LANE_3 | LANE2_MAP_LOGIC_LANE_2 |
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LANE1_MAP_LOGIC_LANE_1 | LANE0_MAP_LOGIC_LANE_0;
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writel(reg, dp->reg_base + EXYNOS_DP_LANE_MAP);
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}
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void exynos_dp_init_interrupt(struct exynos_dp_device *dp)
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{
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/* Set interrupt pin assertion polarity as high */
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writel(INT_POL, dp->reg_base + EXYNOS_DP_INT_CTL);
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/* Clear pending regisers */
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writel(0xff, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_1);
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writel(0x4f, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_2);
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writel(0xe0, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_3);
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writel(0xe7, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_4);
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writel(0x63, dp->reg_base + EXYNOS_DP_INT_STA);
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/* 0:mask,1: unmask */
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writel(0x00, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_1);
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writel(0x00, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_2);
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writel(0x00, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_3);
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writel(0x00, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_4);
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writel(0x00, dp->reg_base + EXYNOS_DP_INT_STA_MASK);
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}
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void exynos_dp_reset(struct exynos_dp_device *dp)
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{
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u32 reg;
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writel(RESET_DP_TX, dp->reg_base + EXYNOS_DP_TX_SW_RESET);
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exynos_dp_stop_video(dp);
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exynos_dp_enable_video_mute(dp, 0);
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reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N |
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AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N |
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HDCP_FUNC_EN_N | SW_FUNC_EN_N;
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writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_1);
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reg = SSC_FUNC_EN_N | AUX_FUNC_EN_N |
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SERDES_FIFO_FUNC_EN_N |
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LS_CLK_DOMAIN_FUNC_EN_N;
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writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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udelay(20);
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exynos_dp_lane_swap(dp, 0);
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writel(0x0, dp->reg_base + EXYNOS_DP_SYS_CTL_1);
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writel(0x40, dp->reg_base + EXYNOS_DP_SYS_CTL_2);
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writel(0x0, dp->reg_base + EXYNOS_DP_SYS_CTL_3);
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writel(0x0, dp->reg_base + EXYNOS_DP_SYS_CTL_4);
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writel(0x0, dp->reg_base + EXYNOS_DP_PKT_SEND_CTL);
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writel(0x0, dp->reg_base + EXYNOS_DP_HDCP_CTL);
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writel(0x5e, dp->reg_base + EXYNOS_DP_HPD_DEGLITCH_L);
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writel(0x1a, dp->reg_base + EXYNOS_DP_HPD_DEGLITCH_H);
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writel(0x10, dp->reg_base + EXYNOS_DP_LINK_DEBUG_CTL);
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writel(0x0, dp->reg_base + EXYNOS_DP_PHY_TEST);
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writel(0x0, dp->reg_base + EXYNOS_DP_VIDEO_FIFO_THRD);
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writel(0x20, dp->reg_base + EXYNOS_DP_AUDIO_MARGIN);
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writel(0x4, dp->reg_base + EXYNOS_DP_M_VID_GEN_FILTER_TH);
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writel(0x2, dp->reg_base + EXYNOS_DP_M_AUD_GEN_FILTER_TH);
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writel(0x00000101, dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL);
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exynos_dp_init_interrupt(dp);
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}
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void exynos_dp_config_interrupt(struct exynos_dp_device *dp)
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{
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u32 reg;
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/* 0: mask, 1: unmask */
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reg = COMMON_INT_MASK_1;
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writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_1);
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reg = COMMON_INT_MASK_2;
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writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_2);
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reg = COMMON_INT_MASK_3;
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writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_3);
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reg = COMMON_INT_MASK_4;
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writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_MASK_4);
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reg = INT_STA_MASK;
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writel(reg, dp->reg_base + EXYNOS_DP_INT_STA_MASK);
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}
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u32 exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = readl(dp->reg_base + EXYNOS_DP_DEBUG_CTL);
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if (reg & PLL_LOCK)
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return PLL_LOCKED;
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else
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return PLL_UNLOCKED;
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}
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void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable)
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{
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u32 reg;
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PLL_CTL);
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reg |= DP_PLL_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PLL_CTL);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PLL_CTL);
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reg &= ~DP_PLL_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PLL_CTL);
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}
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}
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void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp,
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enum analog_power_block block,
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bool enable)
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{
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u32 reg;
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switch (block) {
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case AUX_BLOCK:
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg |= AUX_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg &= ~AUX_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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case CH0_BLOCK:
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg |= CH0_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg &= ~CH0_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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case CH1_BLOCK:
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg |= CH1_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg &= ~CH1_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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case CH2_BLOCK:
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg |= CH2_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg &= ~CH2_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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case CH3_BLOCK:
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg |= CH3_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg &= ~CH3_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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case ANALOG_TOTAL:
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if (enable) {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg |= DP_PHY_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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reg = readl(dp->reg_base + EXYNOS_DP_PHY_PD);
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reg &= ~DP_PHY_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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case POWER_ALL:
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if (enable) {
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reg = DP_PHY_PD | AUX_PD | CH3_PD | CH2_PD |
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CH1_PD | CH0_PD;
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writel(reg, dp->reg_base + EXYNOS_DP_PHY_PD);
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} else {
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writel(0x00, dp->reg_base + EXYNOS_DP_PHY_PD);
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}
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break;
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default:
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break;
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}
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}
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void exynos_dp_init_analog_func(struct exynos_dp_device *dp)
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{
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u32 reg;
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exynos_dp_set_analog_power_down(dp, POWER_ALL, 0);
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reg = PLL_LOCK_CHG;
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writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_1);
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reg = readl(dp->reg_base + EXYNOS_DP_DEBUG_CTL);
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reg &= ~(F_PLL_LOCK | PLL_LOCK_CTRL);
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writel(reg, dp->reg_base + EXYNOS_DP_DEBUG_CTL);
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/* Power up PLL */
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if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED)
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exynos_dp_set_pll_power_down(dp, 0);
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/* Enable Serdes FIFO function and Link symbol clock domain module */
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reg = readl(dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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reg &= ~(SERDES_FIFO_FUNC_EN_N | LS_CLK_DOMAIN_FUNC_EN_N
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| AUX_FUNC_EN_N);
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writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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}
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void exynos_dp_init_hpd(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = HOTPLUG_CHG | HPD_LOST | PLUG;
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writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_4);
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reg = INT_HPD;
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writel(reg, dp->reg_base + EXYNOS_DP_INT_STA);
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reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
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reg &= ~(F_HPD | HPD_CTRL);
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writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_3);
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}
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void exynos_dp_reset_aux(struct exynos_dp_device *dp)
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{
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u32 reg;
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/* Disable AUX channel module */
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reg = readl(dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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reg |= AUX_FUNC_EN_N;
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writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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}
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void exynos_dp_init_aux(struct exynos_dp_device *dp)
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{
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u32 reg;
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/* Clear inerrupts related to AUX channel */
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reg = RPLY_RECEIV | AUX_ERR;
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writel(reg, dp->reg_base + EXYNOS_DP_INT_STA);
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exynos_dp_reset_aux(dp);
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/* Disable AUX transaction H/W retry */
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reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3) | AUX_HW_RETRY_COUNT_SEL(0)|
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AUX_HW_RETRY_INTERVAL_600_MICROSECONDS;
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_HW_RETRY_CTL) ;
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/* Receive AUX Channel DEFER commands equal to DEFFER_COUNT*64 */
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reg = DEFER_CTRL_EN | DEFER_COUNT(1);
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_DEFER_CTL);
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/* Enable AUX channel module */
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reg = readl(dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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reg &= ~AUX_FUNC_EN_N;
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writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2);
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}
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int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
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if (reg & HPD_STATUS)
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return 0;
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return -EINVAL;
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}
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void exynos_dp_enable_sw_function(struct exynos_dp_device *dp)
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{
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u32 reg;
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reg = readl(dp->reg_base + EXYNOS_DP_FUNC_EN_1);
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reg &= ~SW_FUNC_EN_N;
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writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_1);
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}
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int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp)
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{
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int reg;
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int retval = 0;
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/* Enable AUX CH operation */
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reg = readl(dp->reg_base + EXYNOS_DP_AUX_CH_CTL_2);
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reg |= AUX_EN;
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_2);
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/* Is AUX CH command reply received? */
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reg = readl(dp->reg_base + EXYNOS_DP_INT_STA);
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while (!(reg & RPLY_RECEIV))
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reg = readl(dp->reg_base + EXYNOS_DP_INT_STA);
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/* Clear interrupt source for AUX CH command reply */
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writel(RPLY_RECEIV, dp->reg_base + EXYNOS_DP_INT_STA);
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/* Clear interrupt source for AUX CH access error */
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reg = readl(dp->reg_base + EXYNOS_DP_INT_STA);
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if (reg & AUX_ERR) {
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writel(AUX_ERR, dp->reg_base + EXYNOS_DP_INT_STA);
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return -EREMOTEIO;
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}
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/* Check AUX CH error access status */
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reg = readl(dp->reg_base + EXYNOS_DP_AUX_CH_STA);
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if ((reg & AUX_STATUS_MASK) != 0) {
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dev_err(dp->dev, "AUX CH error happens: %d\n\n",
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reg & AUX_STATUS_MASK);
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return -EREMOTEIO;
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}
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return retval;
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}
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int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp,
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unsigned int reg_addr,
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unsigned char data)
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{
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u32 reg;
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int i;
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int retval;
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for (i = 0; i < 3; i++) {
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/* Clear AUX CH data buffer */
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reg = BUF_CLR;
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writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL);
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/* Select DPCD device address */
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reg = AUX_ADDR_7_0(reg_addr);
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_7_0);
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reg = AUX_ADDR_15_8(reg_addr);
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_15_8);
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reg = AUX_ADDR_19_16(reg_addr);
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_19_16);
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/* Write data buffer */
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reg = (unsigned int)data;
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writel(reg, dp->reg_base + EXYNOS_DP_BUF_DATA_0);
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/*
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* Set DisplayPort transaction and write 1 byte
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* If bit 3 is 1, DisplayPort transaction.
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* If Bit 3 is 0, I2C transaction.
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*/
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reg = AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_WRITE;
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writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1);
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/* Start AUX transaction */
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retval = exynos_dp_start_aux_transaction(dp);
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if (retval == 0)
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break;
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else
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dev_err(dp->dev, "Aux Transaction fail!\n");
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}
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return retval;
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}
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int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp,
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unsigned int reg_addr,
|
|
unsigned char *data)
|
|
{
|
|
u32 reg;
|
|
int i;
|
|
int retval;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
/* Clear AUX CH data buffer */
|
|
reg = BUF_CLR;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL);
|
|
|
|
/* Select DPCD device address */
|
|
reg = AUX_ADDR_7_0(reg_addr);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_7_0);
|
|
reg = AUX_ADDR_15_8(reg_addr);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_15_8);
|
|
reg = AUX_ADDR_19_16(reg_addr);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_19_16);
|
|
|
|
/*
|
|
* Set DisplayPort transaction and read 1 byte
|
|
* If bit 3 is 1, DisplayPort transaction.
|
|
* If Bit 3 is 0, I2C transaction.
|
|
*/
|
|
reg = AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_READ;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1);
|
|
|
|
/* Start AUX transaction */
|
|
retval = exynos_dp_start_aux_transaction(dp);
|
|
if (retval == 0)
|
|
break;
|
|
else
|
|
dev_err(dp->dev, "Aux Transaction fail!\n");
|
|
}
|
|
|
|
/* Read data buffer */
|
|
reg = readl(dp->reg_base + EXYNOS_DP_BUF_DATA_0);
|
|
*data = (unsigned char)(reg & 0xff);
|
|
|
|
return retval;
|
|
}
|
|
|
|
int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp,
|
|
unsigned int reg_addr,
|
|
unsigned int count,
|
|
unsigned char data[])
|
|
{
|
|
u32 reg;
|
|
unsigned int start_offset;
|
|
unsigned int cur_data_count;
|
|
unsigned int cur_data_idx;
|
|
int i;
|
|
int retval = 0;
|
|
|
|
/* Clear AUX CH data buffer */
|
|
reg = BUF_CLR;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL);
|
|
|
|
start_offset = 0;
|
|
while (start_offset < count) {
|
|
/* Buffer size of AUX CH is 16 * 4bytes */
|
|
if ((count - start_offset) > 16)
|
|
cur_data_count = 16;
|
|
else
|
|
cur_data_count = count - start_offset;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
/* Select DPCD device address */
|
|
reg = AUX_ADDR_7_0(reg_addr + start_offset);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_7_0);
|
|
reg = AUX_ADDR_15_8(reg_addr + start_offset);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_15_8);
|
|
reg = AUX_ADDR_19_16(reg_addr + start_offset);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_19_16);
|
|
|
|
for (cur_data_idx = 0; cur_data_idx < cur_data_count;
|
|
cur_data_idx++) {
|
|
reg = data[start_offset + cur_data_idx];
|
|
writel(reg, dp->reg_base + EXYNOS_DP_BUF_DATA_0
|
|
+ 4 * cur_data_idx);
|
|
}
|
|
|
|
/*
|
|
* Set DisplayPort transaction and write
|
|
* If bit 3 is 1, DisplayPort transaction.
|
|
* If Bit 3 is 0, I2C transaction.
|
|
*/
|
|
reg = AUX_LENGTH(cur_data_count) |
|
|
AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_WRITE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1);
|
|
|
|
/* Start AUX transaction */
|
|
retval = exynos_dp_start_aux_transaction(dp);
|
|
if (retval == 0)
|
|
break;
|
|
else
|
|
dev_err(dp->dev, "Aux Transaction fail!\n");
|
|
}
|
|
|
|
start_offset += cur_data_count;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp,
|
|
unsigned int reg_addr,
|
|
unsigned int count,
|
|
unsigned char data[])
|
|
{
|
|
u32 reg;
|
|
unsigned int start_offset;
|
|
unsigned int cur_data_count;
|
|
unsigned int cur_data_idx;
|
|
int i;
|
|
int retval = 0;
|
|
|
|
/* Clear AUX CH data buffer */
|
|
reg = BUF_CLR;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL);
|
|
|
|
start_offset = 0;
|
|
while (start_offset < count) {
|
|
/* Buffer size of AUX CH is 16 * 4bytes */
|
|
if ((count - start_offset) > 16)
|
|
cur_data_count = 16;
|
|
else
|
|
cur_data_count = count - start_offset;
|
|
|
|
/* AUX CH Request Transaction process */
|
|
for (i = 0; i < 10; i++) {
|
|
/* Select DPCD device address */
|
|
reg = AUX_ADDR_7_0(reg_addr + start_offset);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_7_0);
|
|
reg = AUX_ADDR_15_8(reg_addr + start_offset);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_15_8);
|
|
reg = AUX_ADDR_19_16(reg_addr + start_offset);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_19_16);
|
|
|
|
/*
|
|
* Set DisplayPort transaction and read
|
|
* If bit 3 is 1, DisplayPort transaction.
|
|
* If Bit 3 is 0, I2C transaction.
|
|
*/
|
|
reg = AUX_LENGTH(cur_data_count) |
|
|
AUX_TX_COMM_DP_TRANSACTION | AUX_TX_COMM_READ;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1);
|
|
|
|
/* Start AUX transaction */
|
|
retval = exynos_dp_start_aux_transaction(dp);
|
|
if (retval == 0)
|
|
break;
|
|
else
|
|
dev_err(dp->dev, "Aux Transaction fail!\n");
|
|
}
|
|
|
|
for (cur_data_idx = 0; cur_data_idx < cur_data_count;
|
|
cur_data_idx++) {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_BUF_DATA_0
|
|
+ 4 * cur_data_idx);
|
|
data[start_offset + cur_data_idx] =
|
|
(unsigned char)reg;
|
|
}
|
|
|
|
start_offset += cur_data_count;
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
int exynos_dp_select_i2c_device(struct exynos_dp_device *dp,
|
|
unsigned int device_addr,
|
|
unsigned int reg_addr)
|
|
{
|
|
u32 reg;
|
|
int retval;
|
|
|
|
/* Set EDID device address */
|
|
reg = device_addr;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_ADDR_7_0);
|
|
writel(0x0, dp->reg_base + EXYNOS_DP_AUX_ADDR_15_8);
|
|
writel(0x0, dp->reg_base + EXYNOS_DP_AUX_ADDR_19_16);
|
|
|
|
/* Set offset from base address of EDID device */
|
|
writel(reg_addr, dp->reg_base + EXYNOS_DP_BUF_DATA_0);
|
|
|
|
/*
|
|
* Set I2C transaction and write address
|
|
* If bit 3 is 1, DisplayPort transaction.
|
|
* If Bit 3 is 0, I2C transaction.
|
|
*/
|
|
reg = AUX_TX_COMM_I2C_TRANSACTION | AUX_TX_COMM_MOT |
|
|
AUX_TX_COMM_WRITE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1);
|
|
|
|
/* Start AUX transaction */
|
|
retval = exynos_dp_start_aux_transaction(dp);
|
|
if (retval != 0)
|
|
dev_err(dp->dev, "Aux Transaction fail!\n");
|
|
|
|
return retval;
|
|
}
|
|
|
|
int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp,
|
|
unsigned int device_addr,
|
|
unsigned int reg_addr,
|
|
unsigned int *data)
|
|
{
|
|
u32 reg;
|
|
int i;
|
|
int retval;
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
/* Clear AUX CH data buffer */
|
|
reg = BUF_CLR;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL);
|
|
|
|
/* Select EDID device */
|
|
retval = exynos_dp_select_i2c_device(dp, device_addr, reg_addr);
|
|
if (retval != 0) {
|
|
dev_err(dp->dev, "Select EDID device fail!\n");
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Set I2C transaction and read data
|
|
* If bit 3 is 1, DisplayPort transaction.
|
|
* If Bit 3 is 0, I2C transaction.
|
|
*/
|
|
reg = AUX_TX_COMM_I2C_TRANSACTION |
|
|
AUX_TX_COMM_READ;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1);
|
|
|
|
/* Start AUX transaction */
|
|
retval = exynos_dp_start_aux_transaction(dp);
|
|
if (retval == 0)
|
|
break;
|
|
else
|
|
dev_err(dp->dev, "Aux Transaction fail!\n");
|
|
}
|
|
|
|
/* Read data */
|
|
if (retval == 0)
|
|
*data = readl(dp->reg_base + EXYNOS_DP_BUF_DATA_0);
|
|
|
|
return retval;
|
|
}
|
|
|
|
int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp,
|
|
unsigned int device_addr,
|
|
unsigned int reg_addr,
|
|
unsigned int count,
|
|
unsigned char edid[])
|
|
{
|
|
u32 reg;
|
|
unsigned int i, j;
|
|
unsigned int cur_data_idx;
|
|
unsigned int defer = 0;
|
|
int retval = 0;
|
|
|
|
for (i = 0; i < count; i += 16) {
|
|
for (j = 0; j < 100; j++) {
|
|
/* Clear AUX CH data buffer */
|
|
reg = BUF_CLR;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL);
|
|
|
|
/* Set normal AUX CH command */
|
|
reg = readl(dp->reg_base + EXYNOS_DP_AUX_CH_CTL_2);
|
|
reg &= ~ADDR_ONLY;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_2);
|
|
|
|
/*
|
|
* If Rx sends defer, Tx sends only reads
|
|
* request without sending addres
|
|
*/
|
|
if (!defer)
|
|
retval = exynos_dp_select_i2c_device(dp,
|
|
device_addr, reg_addr + i);
|
|
else
|
|
defer = 0;
|
|
|
|
if (retval == 0) {
|
|
/*
|
|
* Set I2C transaction and write data
|
|
* If bit 3 is 1, DisplayPort transaction.
|
|
* If Bit 3 is 0, I2C transaction.
|
|
*/
|
|
reg = AUX_LENGTH(16) |
|
|
AUX_TX_COMM_I2C_TRANSACTION |
|
|
AUX_TX_COMM_READ;
|
|
writel(reg, dp->reg_base +
|
|
EXYNOS_DP_AUX_CH_CTL_1);
|
|
|
|
/* Start AUX transaction */
|
|
retval = exynos_dp_start_aux_transaction(dp);
|
|
if (retval == 0)
|
|
break;
|
|
else
|
|
dev_err(dp->dev, "Aux Transaction fail!\n");
|
|
}
|
|
/* Check if Rx sends defer */
|
|
reg = readl(dp->reg_base + EXYNOS_DP_AUX_RX_COMM);
|
|
if (reg == AUX_RX_COMM_AUX_DEFER ||
|
|
reg == AUX_RX_COMM_I2C_DEFER) {
|
|
dev_err(dp->dev, "Defer: %d\n\n", reg);
|
|
defer = 1;
|
|
}
|
|
}
|
|
|
|
for (cur_data_idx = 0; cur_data_idx < 16; cur_data_idx++) {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_BUF_DATA_0
|
|
+ 4 * cur_data_idx);
|
|
edid[i + cur_data_idx] = (unsigned char)reg;
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = bwtype;
|
|
if ((bwtype == LINK_RATE_2_70GBPS) || (bwtype == LINK_RATE_1_62GBPS))
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LINK_BW_SET);
|
|
}
|
|
|
|
void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_LINK_BW_SET);
|
|
*bwtype = reg;
|
|
}
|
|
|
|
void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = count;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LANE_COUNT_SET);
|
|
}
|
|
|
|
void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_LANE_COUNT_SET);
|
|
*count = reg;
|
|
}
|
|
|
|
void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable)
|
|
{
|
|
u32 reg;
|
|
|
|
if (enable) {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
reg |= ENHANCED;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
} else {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
reg &= ~ENHANCED;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
}
|
|
}
|
|
|
|
void exynos_dp_set_training_pattern(struct exynos_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 + EXYNOS_DP_TRAINING_PTN_SET);
|
|
break;
|
|
case D10_2:
|
|
reg = SCRAMBLING_ENABLE | LINK_QUAL_PATTERN_SET_D10_2;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET);
|
|
break;
|
|
case TRAINING_PTN1:
|
|
reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN1;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET);
|
|
break;
|
|
case TRAINING_PTN2:
|
|
reg = SCRAMBLING_DISABLE | SW_TRAINING_PATTERN_SET_PTN2;
|
|
writel(reg, dp->reg_base + EXYNOS_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 + EXYNOS_DP_TRAINING_PTN_SET);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = level << PRE_EMPHASIS_SET_SHIFT;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN0_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = level << PRE_EMPHASIS_SET_SHIFT;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN1_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = level << PRE_EMPHASIS_SET_SHIFT;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN2_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = level << PRE_EMPHASIS_SET_SHIFT;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN3_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp,
|
|
u32 training_lane)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = training_lane;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN0_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp,
|
|
u32 training_lane)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = training_lane;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN1_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp,
|
|
u32 training_lane)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = training_lane;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN2_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp,
|
|
u32 training_lane)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = training_lane;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_LN3_LINK_TRAINING_CTL);
|
|
}
|
|
|
|
u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_LN0_LINK_TRAINING_CTL);
|
|
return reg;
|
|
}
|
|
|
|
u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_LN1_LINK_TRAINING_CTL);
|
|
return reg;
|
|
}
|
|
|
|
u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_LN2_LINK_TRAINING_CTL);
|
|
return reg;
|
|
}
|
|
|
|
u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_LN3_LINK_TRAINING_CTL);
|
|
return reg;
|
|
}
|
|
|
|
void exynos_dp_reset_macro(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_PHY_TEST);
|
|
reg |= MACRO_RST;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_PHY_TEST);
|
|
|
|
/* 10 us is the minimum reset time. */
|
|
udelay(10);
|
|
|
|
reg &= ~MACRO_RST;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_PHY_TEST);
|
|
}
|
|
|
|
int exynos_dp_init_video(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = VSYNC_DET | VID_FORMAT_CHG | VID_CLK_CHG;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_1);
|
|
|
|
reg = 0x0;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_1);
|
|
|
|
reg = CHA_CRI(4) | CHA_CTRL;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_2);
|
|
|
|
reg = 0x0;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_3);
|
|
|
|
reg = VID_HRES_TH(2) | VID_VRES_TH(0);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_8);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void exynos_dp_set_video_color_format(struct exynos_dp_device *dp,
|
|
u32 color_depth,
|
|
u32 color_space,
|
|
u32 dynamic_range,
|
|
u32 ycbcr_coeff)
|
|
{
|
|
u32 reg;
|
|
|
|
/* Configure the input color depth, color space, dynamic range */
|
|
reg = (dynamic_range << IN_D_RANGE_SHIFT) |
|
|
(color_depth << IN_BPC_SHIFT) |
|
|
(color_space << IN_COLOR_F_SHIFT);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_2);
|
|
|
|
/* Set Input Color YCbCr Coefficients to ITU601 or ITU709 */
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_3);
|
|
reg &= ~IN_YC_COEFFI_MASK;
|
|
if (ycbcr_coeff)
|
|
reg |= IN_YC_COEFFI_ITU709;
|
|
else
|
|
reg |= IN_YC_COEFFI_ITU601;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_3);
|
|
}
|
|
|
|
int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_1);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_1);
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_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 + EXYNOS_DP_SYS_CTL_2);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_2);
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_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 exynos_dp_set_video_cr_mn(struct exynos_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 + EXYNOS_DP_SYS_CTL_4);
|
|
reg |= FIX_M_VID;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
reg = m_value & 0xff;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_M_VID_0);
|
|
reg = (m_value >> 8) & 0xff;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_M_VID_1);
|
|
reg = (m_value >> 16) & 0xff;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_M_VID_2);
|
|
|
|
reg = n_value & 0xff;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_N_VID_0);
|
|
reg = (n_value >> 8) & 0xff;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_N_VID_1);
|
|
reg = (n_value >> 16) & 0xff;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_N_VID_2);
|
|
} else {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
reg &= ~FIX_M_VID;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_4);
|
|
|
|
writel(0x00, dp->reg_base + EXYNOS_DP_N_VID_0);
|
|
writel(0x80, dp->reg_base + EXYNOS_DP_N_VID_1);
|
|
writel(0x00, dp->reg_base + EXYNOS_DP_N_VID_2);
|
|
}
|
|
}
|
|
|
|
void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type)
|
|
{
|
|
u32 reg;
|
|
|
|
if (type == VIDEO_TIMING_FROM_CAPTURE) {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
reg &= ~FORMAT_SEL;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
} else {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
reg |= FORMAT_SEL;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
}
|
|
}
|
|
|
|
void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable)
|
|
{
|
|
u32 reg;
|
|
|
|
if (enable) {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL);
|
|
reg &= ~VIDEO_MODE_MASK;
|
|
reg |= VIDEO_MASTER_MODE_EN | VIDEO_MODE_MASTER_MODE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL);
|
|
} else {
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL);
|
|
reg &= ~VIDEO_MODE_MASK;
|
|
reg |= VIDEO_MODE_SLAVE_MODE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL);
|
|
}
|
|
}
|
|
|
|
void exynos_dp_start_video(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
|
|
reg |= VIDEO_EN;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_1);
|
|
}
|
|
|
|
int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_3);
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3);
|
|
if (!(reg & STRM_VALID)) {
|
|
dev_dbg(dp->dev, "Input video stream is not detected.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp,
|
|
struct video_info *video_info)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_FUNC_EN_1);
|
|
reg &= ~(MASTER_VID_FUNC_EN_N|SLAVE_VID_FUNC_EN_N);
|
|
reg |= MASTER_VID_FUNC_EN_N;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_1);
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
reg &= ~INTERACE_SCAN_CFG;
|
|
reg |= (video_info->interlaced << 2);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
reg &= ~VSYNC_POLARITY_CFG;
|
|
reg |= (video_info->v_sync_polarity << 1);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
reg &= ~HSYNC_POLARITY_CFG;
|
|
reg |= (video_info->h_sync_polarity << 0);
|
|
writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_10);
|
|
|
|
reg = AUDIO_MODE_SPDIF_MODE | VIDEO_MODE_SLAVE_MODE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL);
|
|
}
|
|
|
|
void exynos_dp_enable_scrambling(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET);
|
|
reg &= ~SCRAMBLING_DISABLE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET);
|
|
}
|
|
|
|
void exynos_dp_disable_scrambling(struct exynos_dp_device *dp)
|
|
{
|
|
u32 reg;
|
|
|
|
reg = readl(dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET);
|
|
reg |= SCRAMBLING_DISABLE;
|
|
writel(reg, dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET);
|
|
}
|