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linux/drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
Cristian Ciocaltea 553be2830c phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver 
Add driver for the HDMI/eDP TX Combo PHY found on Rockchip RK3588 SoC.

The PHY is based on a Samsung IP block and supports HDMI 2.1 TMDS, FRL
and eDP links.  The maximum data rate is 12Gbps (FRL), while the minimum
is 250Mbps (TMDS).

Only the TMDS link is currently supported.

Co-developed-by: Algea Cao <algea.cao@rock-chips.com>
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://lore.kernel.org/r/20240214-phy-hdptx-v4-2-e7974f46c1a7@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2024-02-16 12:26:56 +05:30

1029 lines
29 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2021-2022 Rockchip Electronics Co., Ltd.
* Copyright (c) 2024 Collabora Ltd.
*
* Author: Algea Cao <algea.cao@rock-chips.com>
* Author: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
*/
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/rational.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#define GRF_HDPTX_CON0 0x00
#define HDPTX_I_PLL_EN BIT(7)
#define HDPTX_I_BIAS_EN BIT(6)
#define HDPTX_I_BGR_EN BIT(5)
#define GRF_HDPTX_STATUS 0x80
#define HDPTX_O_PLL_LOCK_DONE BIT(3)
#define HDPTX_O_PHY_CLK_RDY BIT(2)
#define HDPTX_O_PHY_RDY BIT(1)
#define HDPTX_O_SB_RDY BIT(0)
#define HDTPX_REG(_n, _min, _max) \
( \
BUILD_BUG_ON_ZERO((0x##_n) < (0x##_min)) + \
BUILD_BUG_ON_ZERO((0x##_n) > (0x##_max)) + \
((0x##_n) * 4) \
)
#define CMN_REG(n) HDTPX_REG(n, 0000, 00a7)
#define SB_REG(n) HDTPX_REG(n, 0100, 0129)
#define LNTOP_REG(n) HDTPX_REG(n, 0200, 0229)
#define LANE_REG(n) HDTPX_REG(n, 0300, 062d)
/* CMN_REG(0008) */
#define LCPLL_EN_MASK BIT(6)
#define LCPLL_LCVCO_MODE_EN_MASK BIT(4)
/* CMN_REG(001e) */
#define LCPLL_PI_EN_MASK BIT(5)
#define LCPLL_100M_CLK_EN_MASK BIT(0)
/* CMN_REG(0025) */
#define LCPLL_PMS_IQDIV_RSTN BIT(4)
/* CMN_REG(0028) */
#define LCPLL_SDC_FRAC_EN BIT(2)
#define LCPLL_SDC_FRAC_RSTN BIT(0)
/* CMN_REG(002d) */
#define LCPLL_SDC_N_MASK GENMASK(3, 1)
/* CMN_REG(002e) */
#define LCPLL_SDC_NUMBERATOR_MASK GENMASK(5, 0)
/* CMN_REG(002f) */
#define LCPLL_SDC_DENOMINATOR_MASK GENMASK(7, 2)
#define LCPLL_SDC_NDIV_RSTN BIT(0)
/* CMN_REG(003d) */
#define ROPLL_LCVCO_EN BIT(4)
/* CMN_REG(004e) */
#define ROPLL_PI_EN BIT(5)
/* CMN_REG(005c) */
#define ROPLL_PMS_IQDIV_RSTN BIT(5)
/* CMN_REG(005e) */
#define ROPLL_SDM_EN_MASK BIT(6)
#define ROPLL_SDM_FRAC_EN_RBR BIT(3)
#define ROPLL_SDM_FRAC_EN_HBR BIT(2)
#define ROPLL_SDM_FRAC_EN_HBR2 BIT(1)
#define ROPLL_SDM_FRAC_EN_HBR3 BIT(0)
/* CMN_REG(0064) */
#define ROPLL_SDM_NUM_SIGN_RBR_MASK BIT(3)
/* CMN_REG(0069) */
#define ROPLL_SDC_N_RBR_MASK GENMASK(2, 0)
/* CMN_REG(0074) */
#define ROPLL_SDC_NDIV_RSTN BIT(2)
#define ROPLL_SSC_EN BIT(0)
/* CMN_REG(0081) */
#define OVRD_PLL_CD_CLK_EN BIT(8)
#define PLL_CD_HSCLK_EAST_EN BIT(0)
/* CMN_REG(0086) */
#define PLL_PCG_POSTDIV_SEL_MASK GENMASK(7, 4)
#define PLL_PCG_CLK_SEL_MASK GENMASK(3, 1)
#define PLL_PCG_CLK_EN BIT(0)
/* CMN_REG(0087) */
#define PLL_FRL_MODE_EN BIT(3)
#define PLL_TX_HS_CLK_EN BIT(2)
/* CMN_REG(0089) */
#define LCPLL_ALONE_MODE BIT(1)
/* CMN_REG(0097) */
#define DIG_CLK_SEL BIT(1)
#define ROPLL_REF BIT(1)
#define LCPLL_REF 0
/* CMN_REG(0099) */
#define CMN_ROPLL_ALONE_MODE BIT(2)
#define ROPLL_ALONE_MODE BIT(2)
/* CMN_REG(009a) */
#define HS_SPEED_SEL BIT(0)
#define DIV_10_CLOCK BIT(0)
/* CMN_REG(009b) */
#define IS_SPEED_SEL BIT(4)
#define LINK_SYMBOL_CLOCK BIT(4)
#define LINK_SYMBOL_CLOCK1_2 0
/* SB_REG(0102) */
#define OVRD_SB_RXTERM_EN_MASK BIT(5)
#define SB_RXTERM_EN_MASK BIT(4)
#define ANA_SB_RXTERM_OFFSP_MASK GENMASK(3, 0)
/* SB_REG(0103) */
#define ANA_SB_RXTERM_OFFSN_MASK GENMASK(6, 3)
#define OVRD_SB_RX_RESCAL_DONE_MASK BIT(1)
#define SB_RX_RESCAL_DONE_MASK BIT(0)
/* SB_REG(0104) */
#define OVRD_SB_EN_MASK BIT(5)
#define SB_EN_MASK BIT(4)
/* SB_REG(0105) */
#define OVRD_SB_EARC_CMDC_EN_MASK BIT(6)
#define SB_EARC_CMDC_EN_MASK BIT(5)
#define ANA_SB_TX_HLVL_PROG_MASK GENMASK(2, 0)
/* SB_REG(0106) */
#define ANA_SB_TX_LLVL_PROG_MASK GENMASK(6, 4)
/* SB_REG(0109) */
#define ANA_SB_DMRX_AFC_DIV_RATIO_MASK GENMASK(2, 0)
/* SB_REG(010f) */
#define OVRD_SB_VREG_EN_MASK BIT(7)
#define SB_VREG_EN_MASK BIT(6)
#define OVRD_SB_VREG_LPF_BYPASS_MASK BIT(5)
#define SB_VREG_LPF_BYPASS_MASK BIT(4)
#define ANA_SB_VREG_GAIN_CTRL_MASK GENMASK(3, 0)
/* SB_REG(0110) */
#define ANA_SB_VREG_REF_SEL_MASK BIT(0)
/* SB_REG(0113) */
#define SB_RX_RCAL_OPT_CODE_MASK GENMASK(5, 4)
#define SB_RX_RTERM_CTRL_MASK GENMASK(3, 0)
/* SB_REG(0114) */
#define SB_TG_SB_EN_DELAY_TIME_MASK GENMASK(5, 3)
#define SB_TG_RXTERM_EN_DELAY_TIME_MASK GENMASK(2, 0)
/* SB_REG(0115) */
#define SB_READY_DELAY_TIME_MASK GENMASK(5, 3)
#define SB_TG_OSC_EN_DELAY_TIME_MASK GENMASK(2, 0)
/* SB_REG(0116) */
#define AFC_RSTN_DELAY_TIME_MASK GENMASK(6, 4)
/* SB_REG(0117) */
#define FAST_PULSE_TIME_MASK GENMASK(3, 0)
/* SB_REG(011b) */
#define SB_EARC_SIG_DET_BYPASS_MASK BIT(4)
#define SB_AFC_TOL_MASK GENMASK(3, 0)
/* SB_REG(011f) */
#define SB_PWM_AFC_CTRL_MASK GENMASK(7, 2)
#define SB_RCAL_RSTN_MASK BIT(1)
/* SB_REG(0120) */
#define SB_EARC_EN_MASK BIT(1)
#define SB_EARC_AFC_EN_MASK BIT(2)
/* SB_REG(0123) */
#define OVRD_SB_READY_MASK BIT(5)
#define SB_READY_MASK BIT(4)
/* LNTOP_REG(0200) */
#define PROTOCOL_SEL BIT(2)
#define HDMI_MODE BIT(2)
#define HDMI_TMDS_FRL_SEL BIT(1)
/* LNTOP_REG(0206) */
#define DATA_BUS_SEL BIT(0)
#define DATA_BUS_36_40 BIT(0)
/* LNTOP_REG(0207) */
#define LANE_EN 0xf
#define ALL_LANE_EN 0xf
/* LANE_REG(0312) */
#define LN0_TX_SER_RATE_SEL_RBR BIT(5)
#define LN0_TX_SER_RATE_SEL_HBR BIT(4)
#define LN0_TX_SER_RATE_SEL_HBR2 BIT(3)
#define LN0_TX_SER_RATE_SEL_HBR3 BIT(2)
/* LANE_REG(0412) */
#define LN1_TX_SER_RATE_SEL_RBR BIT(5)
#define LN1_TX_SER_RATE_SEL_HBR BIT(4)
#define LN1_TX_SER_RATE_SEL_HBR2 BIT(3)
#define LN1_TX_SER_RATE_SEL_HBR3 BIT(2)
/* LANE_REG(0512) */
#define LN2_TX_SER_RATE_SEL_RBR BIT(5)
#define LN2_TX_SER_RATE_SEL_HBR BIT(4)
#define LN2_TX_SER_RATE_SEL_HBR2 BIT(3)
#define LN2_TX_SER_RATE_SEL_HBR3 BIT(2)
/* LANE_REG(0612) */
#define LN3_TX_SER_RATE_SEL_RBR BIT(5)
#define LN3_TX_SER_RATE_SEL_HBR BIT(4)
#define LN3_TX_SER_RATE_SEL_HBR2 BIT(3)
#define LN3_TX_SER_RATE_SEL_HBR3 BIT(2)
struct lcpll_config {
u32 bit_rate;
u8 lcvco_mode_en;
u8 pi_en;
u8 clk_en_100m;
u8 pms_mdiv;
u8 pms_mdiv_afc;
u8 pms_pdiv;
u8 pms_refdiv;
u8 pms_sdiv;
u8 pi_cdiv_rstn;
u8 pi_cdiv_sel;
u8 sdm_en;
u8 sdm_rstn;
u8 sdc_frac_en;
u8 sdc_rstn;
u8 sdm_deno;
u8 sdm_num_sign;
u8 sdm_num;
u8 sdc_n;
u8 sdc_n2;
u8 sdc_num;
u8 sdc_deno;
u8 sdc_ndiv_rstn;
u8 ssc_en;
u8 ssc_fm_dev;
u8 ssc_fm_freq;
u8 ssc_clk_div_sel;
u8 cd_tx_ser_rate_sel;
};
struct ropll_config {
u32 bit_rate;
u8 pms_mdiv;
u8 pms_mdiv_afc;
u8 pms_pdiv;
u8 pms_refdiv;
u8 pms_sdiv;
u8 pms_iqdiv_rstn;
u8 ref_clk_sel;
u8 sdm_en;
u8 sdm_rstn;
u8 sdc_frac_en;
u8 sdc_rstn;
u8 sdm_clk_div;
u8 sdm_deno;
u8 sdm_num_sign;
u8 sdm_num;
u8 sdc_n;
u8 sdc_num;
u8 sdc_deno;
u8 sdc_ndiv_rstn;
u8 ssc_en;
u8 ssc_fm_dev;
u8 ssc_fm_freq;
u8 ssc_clk_div_sel;
u8 ana_cpp_ctrl;
u8 ana_lpf_c_sel;
u8 cd_tx_ser_rate_sel;
};
enum rk_hdptx_reset {
RST_PHY = 0,
RST_APB,
RST_INIT,
RST_CMN,
RST_LANE,
RST_ROPLL,
RST_LCPLL,
RST_MAX
};
struct rk_hdptx_phy {
struct device *dev;
struct regmap *regmap;
struct regmap *grf;
struct phy *phy;
struct phy_config *phy_cfg;
struct clk_bulk_data *clks;
int nr_clks;
struct reset_control_bulk_data rsts[RST_MAX];
};
static const struct ropll_config ropll_tmds_cfg[] = {
{ 5940000, 124, 124, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 62, 1, 16, 5, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 3712500, 155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 62, 1, 16, 5, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 2970000, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 62, 1, 16, 5, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1620000, 135, 135, 1, 1, 3, 1, 1, 0, 1, 1, 1, 1, 4, 0, 3, 5, 5, 0x10,
1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1856250, 155, 155, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 62, 1, 16, 5, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1540000, 193, 193, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 193, 1, 32, 2, 1,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1485000, 0x7b, 0x7b, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 4, 0, 3, 5, 5,
0x10, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1462500, 122, 122, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 244, 1, 16, 2, 1, 1,
1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1190000, 149, 149, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 149, 1, 16, 2, 1, 1,
1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1065000, 89, 89, 1, 1, 3, 1, 1, 1, 1, 1, 1, 1, 89, 1, 16, 1, 0, 1,
1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 1080000, 135, 135, 1, 1, 5, 1, 1, 0, 1, 0, 1, 1, 0x9, 0, 0x05, 0,
0x14, 0x18, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 855000, 214, 214, 1, 1, 11, 1, 1, 1, 1, 1, 1, 1, 214, 1, 16, 2, 1,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 835000, 105, 105, 1, 1, 5, 1, 1, 1, 1, 1, 1, 1, 42, 1, 16, 1, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 928125, 155, 155, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 62, 1, 16, 5, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 742500, 124, 124, 1, 1, 7, 1, 1, 1, 1, 1, 1, 1, 62, 1, 16, 5, 0,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 650000, 162, 162, 1, 1, 11, 1, 1, 1, 1, 1, 1, 1, 54, 0, 16, 4, 1,
1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 337500, 0x70, 0x70, 1, 1, 0xf, 1, 1, 1, 1, 1, 1, 1, 0x2, 0, 0x01, 5,
1, 1, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 400000, 100, 100, 1, 1, 11, 1, 1, 0, 1, 0, 1, 1, 0x9, 0, 0x05, 0,
0x14, 0x18, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 270000, 0x5a, 0x5a, 1, 1, 0xf, 1, 1, 0, 1, 0, 1, 1, 0x9, 0, 0x05, 0,
0x14, 0x18, 1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
{ 251750, 84, 84, 1, 1, 0xf, 1, 1, 1, 1, 1, 1, 1, 168, 1, 16, 4, 1, 1,
1, 0, 0x20, 0x0c, 1, 0x0e, 0, 0, },
};
static const struct reg_sequence rk_hdtpx_common_cmn_init_seq[] = {
REG_SEQ0(CMN_REG(0009), 0x0c),
REG_SEQ0(CMN_REG(000a), 0x83),
REG_SEQ0(CMN_REG(000b), 0x06),
REG_SEQ0(CMN_REG(000c), 0x20),
REG_SEQ0(CMN_REG(000d), 0xb8),
REG_SEQ0(CMN_REG(000e), 0x0f),
REG_SEQ0(CMN_REG(000f), 0x0f),
REG_SEQ0(CMN_REG(0010), 0x04),
REG_SEQ0(CMN_REG(0011), 0x00),
REG_SEQ0(CMN_REG(0012), 0x26),
REG_SEQ0(CMN_REG(0013), 0x22),
REG_SEQ0(CMN_REG(0014), 0x24),
REG_SEQ0(CMN_REG(0015), 0x77),
REG_SEQ0(CMN_REG(0016), 0x08),
REG_SEQ0(CMN_REG(0017), 0x00),
REG_SEQ0(CMN_REG(0018), 0x04),
REG_SEQ0(CMN_REG(0019), 0x48),
REG_SEQ0(CMN_REG(001a), 0x01),
REG_SEQ0(CMN_REG(001b), 0x00),
REG_SEQ0(CMN_REG(001c), 0x01),
REG_SEQ0(CMN_REG(001d), 0x64),
REG_SEQ0(CMN_REG(001f), 0x00),
REG_SEQ0(CMN_REG(0026), 0x53),
REG_SEQ0(CMN_REG(0029), 0x01),
REG_SEQ0(CMN_REG(0030), 0x00),
REG_SEQ0(CMN_REG(0031), 0x20),
REG_SEQ0(CMN_REG(0032), 0x30),
REG_SEQ0(CMN_REG(0033), 0x0b),
REG_SEQ0(CMN_REG(0034), 0x23),
REG_SEQ0(CMN_REG(0035), 0x00),
REG_SEQ0(CMN_REG(0038), 0x00),
REG_SEQ0(CMN_REG(0039), 0x00),
REG_SEQ0(CMN_REG(003a), 0x00),
REG_SEQ0(CMN_REG(003b), 0x00),
REG_SEQ0(CMN_REG(003c), 0x80),
REG_SEQ0(CMN_REG(003e), 0x0c),
REG_SEQ0(CMN_REG(003f), 0x83),
REG_SEQ0(CMN_REG(0040), 0x06),
REG_SEQ0(CMN_REG(0041), 0x20),
REG_SEQ0(CMN_REG(0042), 0xb8),
REG_SEQ0(CMN_REG(0043), 0x00),
REG_SEQ0(CMN_REG(0044), 0x46),
REG_SEQ0(CMN_REG(0045), 0x24),
REG_SEQ0(CMN_REG(0046), 0xff),
REG_SEQ0(CMN_REG(0047), 0x00),
REG_SEQ0(CMN_REG(0048), 0x44),
REG_SEQ0(CMN_REG(0049), 0xfa),
REG_SEQ0(CMN_REG(004a), 0x08),
REG_SEQ0(CMN_REG(004b), 0x00),
REG_SEQ0(CMN_REG(004c), 0x01),
REG_SEQ0(CMN_REG(004d), 0x64),
REG_SEQ0(CMN_REG(004e), 0x14),
REG_SEQ0(CMN_REG(004f), 0x00),
REG_SEQ0(CMN_REG(0050), 0x00),
REG_SEQ0(CMN_REG(005d), 0x0c),
REG_SEQ0(CMN_REG(005f), 0x01),
REG_SEQ0(CMN_REG(006b), 0x04),
REG_SEQ0(CMN_REG(0073), 0x30),
REG_SEQ0(CMN_REG(0074), 0x00),
REG_SEQ0(CMN_REG(0075), 0x20),
REG_SEQ0(CMN_REG(0076), 0x30),
REG_SEQ0(CMN_REG(0077), 0x08),
REG_SEQ0(CMN_REG(0078), 0x0c),
REG_SEQ0(CMN_REG(0079), 0x00),
REG_SEQ0(CMN_REG(007b), 0x00),
REG_SEQ0(CMN_REG(007c), 0x00),
REG_SEQ0(CMN_REG(007d), 0x00),
REG_SEQ0(CMN_REG(007e), 0x00),
REG_SEQ0(CMN_REG(007f), 0x00),
REG_SEQ0(CMN_REG(0080), 0x00),
REG_SEQ0(CMN_REG(0081), 0x09),
REG_SEQ0(CMN_REG(0082), 0x04),
REG_SEQ0(CMN_REG(0083), 0x24),
REG_SEQ0(CMN_REG(0084), 0x20),
REG_SEQ0(CMN_REG(0085), 0x03),
REG_SEQ0(CMN_REG(0086), 0x01),
REG_SEQ0(CMN_REG(0087), 0x0c),
REG_SEQ0(CMN_REG(008a), 0x55),
REG_SEQ0(CMN_REG(008b), 0x25),
REG_SEQ0(CMN_REG(008c), 0x2c),
REG_SEQ0(CMN_REG(008d), 0x22),
REG_SEQ0(CMN_REG(008e), 0x14),
REG_SEQ0(CMN_REG(008f), 0x20),
REG_SEQ0(CMN_REG(0090), 0x00),
REG_SEQ0(CMN_REG(0091), 0x00),
REG_SEQ0(CMN_REG(0092), 0x00),
REG_SEQ0(CMN_REG(0093), 0x00),
REG_SEQ0(CMN_REG(009a), 0x11),
REG_SEQ0(CMN_REG(009b), 0x10),
};
static const struct reg_sequence rk_hdtpx_tmds_cmn_init_seq[] = {
REG_SEQ0(CMN_REG(0008), 0x00),
REG_SEQ0(CMN_REG(0011), 0x01),
REG_SEQ0(CMN_REG(0017), 0x20),
REG_SEQ0(CMN_REG(001e), 0x14),
REG_SEQ0(CMN_REG(0020), 0x00),
REG_SEQ0(CMN_REG(0021), 0x00),
REG_SEQ0(CMN_REG(0022), 0x11),
REG_SEQ0(CMN_REG(0023), 0x00),
REG_SEQ0(CMN_REG(0024), 0x00),
REG_SEQ0(CMN_REG(0025), 0x53),
REG_SEQ0(CMN_REG(0026), 0x00),
REG_SEQ0(CMN_REG(0027), 0x00),
REG_SEQ0(CMN_REG(0028), 0x01),
REG_SEQ0(CMN_REG(002a), 0x00),
REG_SEQ0(CMN_REG(002b), 0x00),
REG_SEQ0(CMN_REG(002c), 0x00),
REG_SEQ0(CMN_REG(002d), 0x00),
REG_SEQ0(CMN_REG(002e), 0x04),
REG_SEQ0(CMN_REG(002f), 0x00),
REG_SEQ0(CMN_REG(0030), 0x20),
REG_SEQ0(CMN_REG(0031), 0x30),
REG_SEQ0(CMN_REG(0032), 0x0b),
REG_SEQ0(CMN_REG(0033), 0x23),
REG_SEQ0(CMN_REG(0034), 0x00),
REG_SEQ0(CMN_REG(003d), 0x40),
REG_SEQ0(CMN_REG(0042), 0x78),
REG_SEQ0(CMN_REG(004e), 0x34),
REG_SEQ0(CMN_REG(005c), 0x25),
REG_SEQ0(CMN_REG(005e), 0x4f),
REG_SEQ0(CMN_REG(0074), 0x04),
REG_SEQ0(CMN_REG(0081), 0x01),
REG_SEQ0(CMN_REG(0087), 0x04),
REG_SEQ0(CMN_REG(0089), 0x00),
REG_SEQ0(CMN_REG(0095), 0x00),
REG_SEQ0(CMN_REG(0097), 0x02),
REG_SEQ0(CMN_REG(0099), 0x04),
REG_SEQ0(CMN_REG(009b), 0x00),
};
static const struct reg_sequence rk_hdtpx_common_sb_init_seq[] = {
REG_SEQ0(SB_REG(0114), 0x00),
REG_SEQ0(SB_REG(0115), 0x00),
REG_SEQ0(SB_REG(0116), 0x00),
REG_SEQ0(SB_REG(0117), 0x00),
};
static const struct reg_sequence rk_hdtpx_tmds_lntop_highbr_seq[] = {
REG_SEQ0(LNTOP_REG(0201), 0x00),
REG_SEQ0(LNTOP_REG(0202), 0x00),
REG_SEQ0(LNTOP_REG(0203), 0x0f),
REG_SEQ0(LNTOP_REG(0204), 0xff),
REG_SEQ0(LNTOP_REG(0205), 0xff),
};
static const struct reg_sequence rk_hdtpx_tmds_lntop_lowbr_seq[] = {
REG_SEQ0(LNTOP_REG(0201), 0x07),
REG_SEQ0(LNTOP_REG(0202), 0xc1),
REG_SEQ0(LNTOP_REG(0203), 0xf0),
REG_SEQ0(LNTOP_REG(0204), 0x7c),
REG_SEQ0(LNTOP_REG(0205), 0x1f),
};
static const struct reg_sequence rk_hdtpx_common_lane_init_seq[] = {
REG_SEQ0(LANE_REG(0303), 0x0c),
REG_SEQ0(LANE_REG(0307), 0x20),
REG_SEQ0(LANE_REG(030a), 0x17),
REG_SEQ0(LANE_REG(030b), 0x77),
REG_SEQ0(LANE_REG(030c), 0x77),
REG_SEQ0(LANE_REG(030d), 0x77),
REG_SEQ0(LANE_REG(030e), 0x38),
REG_SEQ0(LANE_REG(0310), 0x03),
REG_SEQ0(LANE_REG(0311), 0x0f),
REG_SEQ0(LANE_REG(0316), 0x02),
REG_SEQ0(LANE_REG(031b), 0x01),
REG_SEQ0(LANE_REG(031f), 0x15),
REG_SEQ0(LANE_REG(0320), 0xa0),
REG_SEQ0(LANE_REG(0403), 0x0c),
REG_SEQ0(LANE_REG(0407), 0x20),
REG_SEQ0(LANE_REG(040a), 0x17),
REG_SEQ0(LANE_REG(040b), 0x77),
REG_SEQ0(LANE_REG(040c), 0x77),
REG_SEQ0(LANE_REG(040d), 0x77),
REG_SEQ0(LANE_REG(040e), 0x38),
REG_SEQ0(LANE_REG(0410), 0x03),
REG_SEQ0(LANE_REG(0411), 0x0f),
REG_SEQ0(LANE_REG(0416), 0x02),
REG_SEQ0(LANE_REG(041b), 0x01),
REG_SEQ0(LANE_REG(041f), 0x15),
REG_SEQ0(LANE_REG(0420), 0xa0),
REG_SEQ0(LANE_REG(0503), 0x0c),
REG_SEQ0(LANE_REG(0507), 0x20),
REG_SEQ0(LANE_REG(050a), 0x17),
REG_SEQ0(LANE_REG(050b), 0x77),
REG_SEQ0(LANE_REG(050c), 0x77),
REG_SEQ0(LANE_REG(050d), 0x77),
REG_SEQ0(LANE_REG(050e), 0x38),
REG_SEQ0(LANE_REG(0510), 0x03),
REG_SEQ0(LANE_REG(0511), 0x0f),
REG_SEQ0(LANE_REG(0516), 0x02),
REG_SEQ0(LANE_REG(051b), 0x01),
REG_SEQ0(LANE_REG(051f), 0x15),
REG_SEQ0(LANE_REG(0520), 0xa0),
REG_SEQ0(LANE_REG(0603), 0x0c),
REG_SEQ0(LANE_REG(0607), 0x20),
REG_SEQ0(LANE_REG(060a), 0x17),
REG_SEQ0(LANE_REG(060b), 0x77),
REG_SEQ0(LANE_REG(060c), 0x77),
REG_SEQ0(LANE_REG(060d), 0x77),
REG_SEQ0(LANE_REG(060e), 0x38),
REG_SEQ0(LANE_REG(0610), 0x03),
REG_SEQ0(LANE_REG(0611), 0x0f),
REG_SEQ0(LANE_REG(0616), 0x02),
REG_SEQ0(LANE_REG(061b), 0x01),
REG_SEQ0(LANE_REG(061f), 0x15),
REG_SEQ0(LANE_REG(0620), 0xa0),
};
static const struct reg_sequence rk_hdtpx_tmds_lane_init_seq[] = {
REG_SEQ0(LANE_REG(0312), 0x00),
REG_SEQ0(LANE_REG(031e), 0x00),
REG_SEQ0(LANE_REG(0412), 0x00),
REG_SEQ0(LANE_REG(041e), 0x00),
REG_SEQ0(LANE_REG(0512), 0x00),
REG_SEQ0(LANE_REG(051e), 0x00),
REG_SEQ0(LANE_REG(0612), 0x00),
REG_SEQ0(LANE_REG(061e), 0x08),
REG_SEQ0(LANE_REG(0303), 0x2f),
REG_SEQ0(LANE_REG(0403), 0x2f),
REG_SEQ0(LANE_REG(0503), 0x2f),
REG_SEQ0(LANE_REG(0603), 0x2f),
REG_SEQ0(LANE_REG(0305), 0x03),
REG_SEQ0(LANE_REG(0405), 0x03),
REG_SEQ0(LANE_REG(0505), 0x03),
REG_SEQ0(LANE_REG(0605), 0x03),
REG_SEQ0(LANE_REG(0306), 0x1c),
REG_SEQ0(LANE_REG(0406), 0x1c),
REG_SEQ0(LANE_REG(0506), 0x1c),
REG_SEQ0(LANE_REG(0606), 0x1c),
};
static bool rk_hdptx_phy_is_rw_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case 0x0000 ... 0x029c:
case 0x0400 ... 0x04a4:
case 0x0800 ... 0x08a4:
case 0x0c00 ... 0x0cb4:
case 0x1000 ... 0x10b4:
case 0x1400 ... 0x14b4:
case 0x1800 ... 0x18b4:
return true;
}
return false;
}
static const struct regmap_config rk_hdptx_phy_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.writeable_reg = rk_hdptx_phy_is_rw_reg,
.readable_reg = rk_hdptx_phy_is_rw_reg,
.fast_io = true,
.max_register = 0x18b4,
};
#define rk_hdptx_multi_reg_write(hdptx, seq) \
regmap_multi_reg_write((hdptx)->regmap, seq, ARRAY_SIZE(seq))
static void rk_hdptx_pre_power_up(struct rk_hdptx_phy *hdptx)
{
u32 val;
reset_control_assert(hdptx->rsts[RST_APB].rstc);
usleep_range(20, 25);
reset_control_deassert(hdptx->rsts[RST_APB].rstc);
reset_control_assert(hdptx->rsts[RST_LANE].rstc);
reset_control_assert(hdptx->rsts[RST_CMN].rstc);
reset_control_assert(hdptx->rsts[RST_INIT].rstc);
val = (HDPTX_I_PLL_EN | HDPTX_I_BIAS_EN | HDPTX_I_BGR_EN) << 16;
regmap_write(hdptx->grf, GRF_HDPTX_CON0, val);
}
static int rk_hdptx_post_enable_lane(struct rk_hdptx_phy *hdptx)
{
u32 val;
int ret;
reset_control_deassert(hdptx->rsts[RST_LANE].rstc);
val = (HDPTX_I_BIAS_EN | HDPTX_I_BGR_EN) << 16 |
HDPTX_I_BIAS_EN | HDPTX_I_BGR_EN;
regmap_write(hdptx->grf, GRF_HDPTX_CON0, val);
ret = regmap_read_poll_timeout(hdptx->grf, GRF_HDPTX_STATUS, val,
(val & HDPTX_O_PHY_RDY) &&
(val & HDPTX_O_PLL_LOCK_DONE),
100, 5000);
if (ret) {
dev_err(hdptx->dev, "Failed to get PHY lane lock: %d\n", ret);
return ret;
}
dev_dbg(hdptx->dev, "PHY lane locked\n");
return 0;
}
static int rk_hdptx_post_enable_pll(struct rk_hdptx_phy *hdptx)
{
u32 val;
int ret;
val = (HDPTX_I_BIAS_EN | HDPTX_I_BGR_EN) << 16 |
HDPTX_I_BIAS_EN | HDPTX_I_BGR_EN;
regmap_write(hdptx->grf, GRF_HDPTX_CON0, val);
usleep_range(10, 15);
reset_control_deassert(hdptx->rsts[RST_INIT].rstc);
usleep_range(10, 15);
val = HDPTX_I_PLL_EN << 16 | HDPTX_I_PLL_EN;
regmap_write(hdptx->grf, GRF_HDPTX_CON0, val);
usleep_range(10, 15);
reset_control_deassert(hdptx->rsts[RST_CMN].rstc);
ret = regmap_read_poll_timeout(hdptx->grf, GRF_HDPTX_STATUS, val,
val & HDPTX_O_PHY_CLK_RDY, 20, 400);
if (ret) {
dev_err(hdptx->dev, "Failed to get PHY clk ready: %d\n", ret);
return ret;
}
dev_dbg(hdptx->dev, "PHY clk ready\n");
return 0;
}
static void rk_hdptx_phy_disable(struct rk_hdptx_phy *hdptx)
{
u32 val;
/* reset phy and apb, or phy locked flag may keep 1 */
reset_control_assert(hdptx->rsts[RST_PHY].rstc);
usleep_range(20, 30);
reset_control_deassert(hdptx->rsts[RST_PHY].rstc);
reset_control_assert(hdptx->rsts[RST_APB].rstc);
usleep_range(20, 30);
reset_control_deassert(hdptx->rsts[RST_APB].rstc);
regmap_write(hdptx->regmap, LANE_REG(0300), 0x82);
regmap_write(hdptx->regmap, SB_REG(010f), 0xc1);
regmap_write(hdptx->regmap, SB_REG(0110), 0x1);
regmap_write(hdptx->regmap, LANE_REG(0301), 0x80);
regmap_write(hdptx->regmap, LANE_REG(0401), 0x80);
regmap_write(hdptx->regmap, LANE_REG(0501), 0x80);
regmap_write(hdptx->regmap, LANE_REG(0601), 0x80);
reset_control_assert(hdptx->rsts[RST_LANE].rstc);
reset_control_assert(hdptx->rsts[RST_CMN].rstc);
reset_control_assert(hdptx->rsts[RST_INIT].rstc);
val = (HDPTX_I_PLL_EN | HDPTX_I_BIAS_EN | HDPTX_I_BGR_EN) << 16;
regmap_write(hdptx->grf, GRF_HDPTX_CON0, val);
}
static bool rk_hdptx_phy_clk_pll_calc(unsigned int data_rate,
struct ropll_config *cfg)
{
const unsigned int fout = data_rate / 2, fref = 24000;
unsigned long k = 0, lc, k_sub, lc_sub;
unsigned int fvco, sdc;
u32 mdiv, sdiv, n = 8;
if (fout > 0xfffffff)
return false;
for (sdiv = 16; sdiv >= 1; sdiv--) {
if (sdiv % 2 && sdiv != 1)
continue;
fvco = fout * sdiv;
if (fvco < 2000000 || fvco > 4000000)
continue;
mdiv = DIV_ROUND_UP(fvco, fref);
if (mdiv < 20 || mdiv > 255)
continue;
if (fref * mdiv - fvco) {
for (sdc = 264000; sdc <= 750000; sdc += fref)
if (sdc * n > fref * mdiv)
break;
if (sdc > 750000)
continue;
rational_best_approximation(fref * mdiv - fvco,
sdc / 16,
GENMASK(6, 0),
GENMASK(7, 0),
&k, &lc);
rational_best_approximation(sdc * n - fref * mdiv,
sdc,
GENMASK(6, 0),
GENMASK(7, 0),
&k_sub, &lc_sub);
}
break;
}
if (sdiv < 1)
return false;
if (cfg) {
cfg->pms_mdiv = mdiv;
cfg->pms_mdiv_afc = mdiv;
cfg->pms_pdiv = 1;
cfg->pms_refdiv = 1;
cfg->pms_sdiv = sdiv - 1;
cfg->sdm_en = k > 0 ? 1 : 0;
if (cfg->sdm_en) {
cfg->sdm_deno = lc;
cfg->sdm_num_sign = 1;
cfg->sdm_num = k;
cfg->sdc_n = n - 3;
cfg->sdc_num = k_sub;
cfg->sdc_deno = lc_sub;
}
}
return true;
}
static int rk_hdptx_ropll_tmds_cmn_config(struct rk_hdptx_phy *hdptx,
unsigned int rate)
{
const struct ropll_config *cfg = NULL;
struct ropll_config rc = {0};
int i;
for (i = 0; i < ARRAY_SIZE(ropll_tmds_cfg); i++)
if (rate == ropll_tmds_cfg[i].bit_rate) {
cfg = &ropll_tmds_cfg[i];
break;
}
if (!cfg) {
if (rk_hdptx_phy_clk_pll_calc(rate, &rc)) {
cfg = &rc;
} else {
dev_err(hdptx->dev, "%s cannot find pll cfg\n", __func__);
return -EINVAL;
}
}
dev_dbg(hdptx->dev, "mdiv=%u, sdiv=%u, sdm_en=%u, k_sign=%u, k=%u, lc=%u\n",
cfg->pms_mdiv, cfg->pms_sdiv + 1, cfg->sdm_en,
cfg->sdm_num_sign, cfg->sdm_num, cfg->sdm_deno);
rk_hdptx_pre_power_up(hdptx);
reset_control_assert(hdptx->rsts[RST_ROPLL].rstc);
usleep_range(20, 30);
reset_control_deassert(hdptx->rsts[RST_ROPLL].rstc);
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_common_cmn_init_seq);
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_tmds_cmn_init_seq);
regmap_write(hdptx->regmap, CMN_REG(0051), cfg->pms_mdiv);
regmap_write(hdptx->regmap, CMN_REG(0055), cfg->pms_mdiv_afc);
regmap_write(hdptx->regmap, CMN_REG(0059),
(cfg->pms_pdiv << 4) | cfg->pms_refdiv);
regmap_write(hdptx->regmap, CMN_REG(005a), cfg->pms_sdiv << 4);
regmap_update_bits(hdptx->regmap, CMN_REG(005e), ROPLL_SDM_EN_MASK,
FIELD_PREP(ROPLL_SDM_EN_MASK, cfg->sdm_en));
if (!cfg->sdm_en)
regmap_update_bits(hdptx->regmap, CMN_REG(005e), 0xf, 0);
regmap_update_bits(hdptx->regmap, CMN_REG(0064), ROPLL_SDM_NUM_SIGN_RBR_MASK,
FIELD_PREP(ROPLL_SDM_NUM_SIGN_RBR_MASK, cfg->sdm_num_sign));
regmap_write(hdptx->regmap, CMN_REG(0060), cfg->sdm_deno);
regmap_write(hdptx->regmap, CMN_REG(0065), cfg->sdm_num);
regmap_update_bits(hdptx->regmap, CMN_REG(0069), ROPLL_SDC_N_RBR_MASK,
FIELD_PREP(ROPLL_SDC_N_RBR_MASK, cfg->sdc_n));
regmap_write(hdptx->regmap, CMN_REG(006c), cfg->sdc_num);
regmap_write(hdptx->regmap, CMN_REG(0070), cfg->sdc_deno);
regmap_update_bits(hdptx->regmap, CMN_REG(0086), PLL_PCG_POSTDIV_SEL_MASK,
FIELD_PREP(PLL_PCG_POSTDIV_SEL_MASK, cfg->pms_sdiv));
regmap_update_bits(hdptx->regmap, CMN_REG(0086), PLL_PCG_CLK_EN,
PLL_PCG_CLK_EN);
return rk_hdptx_post_enable_pll(hdptx);
}
static int rk_hdptx_ropll_tmds_mode_config(struct rk_hdptx_phy *hdptx,
unsigned int rate)
{
u32 val;
int ret;
ret = regmap_read(hdptx->grf, GRF_HDPTX_STATUS, &val);
if (ret)
return ret;
if (!(val & HDPTX_O_PLL_LOCK_DONE)) {
ret = rk_hdptx_ropll_tmds_cmn_config(hdptx, rate);
if (ret)
return ret;
}
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_common_sb_init_seq);
regmap_write(hdptx->regmap, LNTOP_REG(0200), 0x06);
if (rate >= 3400000) {
/* For 1/40 bitrate clk */
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_tmds_lntop_highbr_seq);
} else {
/* For 1/10 bitrate clk */
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_tmds_lntop_lowbr_seq);
}
regmap_write(hdptx->regmap, LNTOP_REG(0206), 0x07);
regmap_write(hdptx->regmap, LNTOP_REG(0207), 0x0f);
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_common_lane_init_seq);
rk_hdptx_multi_reg_write(hdptx, rk_hdtpx_tmds_lane_init_seq);
return rk_hdptx_post_enable_lane(hdptx);
}
static int rk_hdptx_phy_power_on(struct phy *phy)
{
struct rk_hdptx_phy *hdptx = phy_get_drvdata(phy);
int ret, bus_width = phy_get_bus_width(hdptx->phy);
/*
* FIXME: Temporary workaround to pass pixel_clk_rate
* from the HDMI bridge driver until phy_configure_opts_hdmi
* becomes available in the PHY API.
*/
unsigned int rate = bus_width & 0xfffffff;
dev_dbg(hdptx->dev, "%s bus_width=%x rate=%u\n",
__func__, bus_width, rate);
ret = pm_runtime_resume_and_get(hdptx->dev);
if (ret) {
dev_err(hdptx->dev, "Failed to resume phy: %d\n", ret);
return ret;
}
ret = rk_hdptx_ropll_tmds_mode_config(hdptx, rate);
if (ret)
pm_runtime_put(hdptx->dev);
return ret;
}
static int rk_hdptx_phy_power_off(struct phy *phy)
{
struct rk_hdptx_phy *hdptx = phy_get_drvdata(phy);
u32 val;
int ret;
ret = regmap_read(hdptx->grf, GRF_HDPTX_STATUS, &val);
if (ret == 0 && (val & HDPTX_O_PLL_LOCK_DONE))
rk_hdptx_phy_disable(hdptx);
pm_runtime_put(hdptx->dev);
return ret;
}
static const struct phy_ops rk_hdptx_phy_ops = {
.power_on = rk_hdptx_phy_power_on,
.power_off = rk_hdptx_phy_power_off,
.owner = THIS_MODULE,
};
static int rk_hdptx_phy_runtime_suspend(struct device *dev)
{
struct rk_hdptx_phy *hdptx = dev_get_drvdata(dev);
clk_bulk_disable_unprepare(hdptx->nr_clks, hdptx->clks);
return 0;
}
static int rk_hdptx_phy_runtime_resume(struct device *dev)
{
struct rk_hdptx_phy *hdptx = dev_get_drvdata(dev);
int ret;
ret = clk_bulk_prepare_enable(hdptx->nr_clks, hdptx->clks);
if (ret)
dev_err(hdptx->dev, "Failed to enable clocks: %d\n", ret);
return ret;
}
static int rk_hdptx_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
struct device *dev = &pdev->dev;
struct rk_hdptx_phy *hdptx;
void __iomem *regs;
int ret;
hdptx = devm_kzalloc(dev, sizeof(*hdptx), GFP_KERNEL);
if (!hdptx)
return -ENOMEM;
hdptx->dev = dev;
regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(regs))
return dev_err_probe(dev, PTR_ERR(regs),
"Failed to ioremap resource\n");
ret = devm_clk_bulk_get_all(dev, &hdptx->clks);
if (ret < 0)
return dev_err_probe(dev, ret, "Failed to get clocks\n");
if (ret == 0)
return dev_err_probe(dev, -EINVAL, "Missing clocks\n");
hdptx->nr_clks = ret;
hdptx->regmap = devm_regmap_init_mmio(dev, regs,
&rk_hdptx_phy_regmap_config);
if (IS_ERR(hdptx->regmap))
return dev_err_probe(dev, PTR_ERR(hdptx->regmap),
"Failed to init regmap\n");
hdptx->rsts[RST_PHY].id = "phy";
hdptx->rsts[RST_APB].id = "apb";
hdptx->rsts[RST_INIT].id = "init";
hdptx->rsts[RST_CMN].id = "cmn";
hdptx->rsts[RST_LANE].id = "lane";
hdptx->rsts[RST_ROPLL].id = "ropll";
hdptx->rsts[RST_LCPLL].id = "lcpll";
ret = devm_reset_control_bulk_get_exclusive(dev, RST_MAX, hdptx->rsts);
if (ret)
return dev_err_probe(dev, ret, "Failed to get resets\n");
hdptx->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
"rockchip,grf");
if (IS_ERR(hdptx->grf))
return dev_err_probe(dev, PTR_ERR(hdptx->grf),
"Could not get GRF syscon\n");
hdptx->phy = devm_phy_create(dev, NULL, &rk_hdptx_phy_ops);
if (IS_ERR(hdptx->phy))
return dev_err_probe(dev, PTR_ERR(hdptx->phy),
"Failed to create HDMI PHY\n");
platform_set_drvdata(pdev, hdptx);
phy_set_drvdata(hdptx->phy, hdptx);
phy_set_bus_width(hdptx->phy, 8);
ret = devm_pm_runtime_enable(dev);
if (ret)
return dev_err_probe(dev, ret, "Failed to enable runtime PM\n");
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
if (IS_ERR(phy_provider))
return dev_err_probe(dev, PTR_ERR(phy_provider),
"Failed to register PHY provider\n");
reset_control_deassert(hdptx->rsts[RST_APB].rstc);
reset_control_deassert(hdptx->rsts[RST_CMN].rstc);
reset_control_deassert(hdptx->rsts[RST_INIT].rstc);
return 0;
}
static const struct dev_pm_ops rk_hdptx_phy_pm_ops = {
RUNTIME_PM_OPS(rk_hdptx_phy_runtime_suspend,
rk_hdptx_phy_runtime_resume, NULL)
};
static const struct of_device_id rk_hdptx_phy_of_match[] = {
{ .compatible = "rockchip,rk3588-hdptx-phy", },
{}
};
MODULE_DEVICE_TABLE(of, rk_hdptx_phy_of_match);
static struct platform_driver rk_hdptx_phy_driver = {
.probe = rk_hdptx_phy_probe,
.driver = {
.name = "rockchip-hdptx-phy",
.pm = &rk_hdptx_phy_pm_ops,
.of_match_table = rk_hdptx_phy_of_match,
},
};
module_platform_driver(rk_hdptx_phy_driver);
MODULE_AUTHOR("Algea Cao <algea.cao@rock-chips.com>");
MODULE_AUTHOR("Cristian Ciocaltea <cristian.ciocaltea@collabora.com>");
MODULE_DESCRIPTION("Samsung HDMI/eDP Transmitter Combo PHY Driver");
MODULE_LICENSE("GPL");
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