Add support for the HDMI PHY/PLL found in MSM8996/APQ8096.
Unlike the previous PHYs supported in the driver, this doesn't need the powerup/powerdown ops. The PLL prepare/unprepare clock ops enable/disable the phy itself.
Signed-off-by: Archit Taneja architt@codeaurora.org --- drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/hdmi/hdmi.h | 8 + drivers/gpu/drm/msm/hdmi/hdmi_phy.c | 5 + drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c | 766 +++++++++++++++++++++++++++++++ 4 files changed, 780 insertions(+) create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 0c5c9c2..ddb4c9d 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -54,6 +54,7 @@ msm-y := \ msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o msm-$(CONFIG_COMMON_CLK) += hdmi/hdmi_pll_8960.o +msm-$(CONFIG_COMMON_CLK) += hdmi/hdmi_phy_8996.o
msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \ mdp/mdp4/mdp4_dsi_encoder.o \ diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h index 1f498b0..88557e5 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.h +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h @@ -147,6 +147,7 @@ enum hdmi_phy_type { MSM_HDMI_PHY_8x60, MSM_HDMI_PHY_8960, MSM_HDMI_PHY_8x74, + MSM_HDMI_PHY_8996, MSM_HDMI_PHY_MAX, };
@@ -163,6 +164,7 @@ struct hdmi_phy_cfg { extern const struct hdmi_phy_cfg hdmi_phy_8x60_cfg; extern const struct hdmi_phy_cfg hdmi_phy_8960_cfg; extern const struct hdmi_phy_cfg hdmi_phy_8x74_cfg; +extern const struct hdmi_phy_cfg hdmi_phy_8996_cfg;
struct hdmi_phy { struct platform_device *pdev; @@ -192,11 +194,17 @@ void __exit hdmi_phy_driver_unregister(void);
#ifdef CONFIG_COMMON_CLK int hdmi_pll_8960_init(struct platform_device *pdev); +int hdmi_pll_8996_init(struct platform_device *pdev); #else int hdmi_pll_8960_init(struct platform_device *pdev); { return -ENODEV; } + +int hdmi_pll_8996_init(struct platform_device *pdev) +{ + return -ENODEV; +} #endif
/* diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy.c index 9ad4573b..4bfeb0e 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_phy.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy.c @@ -127,6 +127,9 @@ static int hdmi_phy_pll_init(struct platform_device *pdev, case MSM_HDMI_PHY_8960: ret = hdmi_pll_8960_init(pdev); break; + case MSM_HDMI_PHY_8996: + ret = hdmi_pll_8996_init(pdev); + break; /* * we don't have PLL support for these, don't report an error for now */ @@ -202,6 +205,8 @@ static const struct of_device_id hdmi_phy_dt_match[] = { .data = &hdmi_phy_8x74_cfg }, { .compatible = "qcom,hdmi-phy-8084", .data = &hdmi_phy_8x74_cfg }, + { .compatible = "qcom,hdmi-phy-8996", + .data = &hdmi_phy_8996_cfg }, {} };
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c new file mode 100644 index 0000000..ed38976 --- /dev/null +++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy_8996.c @@ -0,0 +1,766 @@ +/* + * Copyright (c) 2016, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk-provider.h> + +#include "hdmi.h" + +#define HDMI_VCO_MAX_FREQ 12000000000UL +#define HDMI_VCO_MIN_FREQ 8000000000UL + +#define HDMI_PCLK_MAX_FREQ 600000000 +#define HDMI_PCLK_MIN_FREQ 25000000 + +#define HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD 3400000000UL +#define HDMI_DIG_FREQ_BIT_CLK_THRESHOLD 1500000000UL +#define HDMI_MID_FREQ_BIT_CLK_THRESHOLD 750000000UL +#define HDMI_CORECLK_DIV 5 +#define HDMI_DEFAULT_REF_CLOCK 19200000 +#define HDMI_PLL_CMP_CNT 1024 + +#define HDMI_PLL_POLL_MAX_READS 100 +#define HDMI_PLL_POLL_TIMEOUT_US 150 + +#define HDMI_NUM_TX_CHANNEL 4 + +struct hdmi_pll_8996 { + struct platform_device *pdev; + struct clk_hw clk_hw; + + /* pll mmio base */ + void __iomem *mmio_qserdes_com; + /* tx channel base */ + void __iomem *mmio_qserdes_tx[HDMI_NUM_TX_CHANNEL]; +}; + +#define hw_clk_to_pll(x) container_of(x, struct hdmi_pll_8996, clk_hw) + +struct hdmi_8996_phy_pll_reg_cfg { + u32 tx_lx_lane_mode[HDMI_NUM_TX_CHANNEL]; + u32 tx_lx_tx_band[HDMI_NUM_TX_CHANNEL]; + u32 com_svs_mode_clk_sel; + u32 com_hsclk_sel; + u32 com_pll_cctrl_mode0; + u32 com_pll_rctrl_mode0; + u32 com_cp_ctrl_mode0; + u32 com_dec_start_mode0; + u32 com_div_frac_start1_mode0; + u32 com_div_frac_start2_mode0; + u32 com_div_frac_start3_mode0; + u32 com_integloop_gain0_mode0; + u32 com_integloop_gain1_mode0; + u32 com_lock_cmp_en; + u32 com_lock_cmp1_mode0; + u32 com_lock_cmp2_mode0; + u32 com_lock_cmp3_mode0; + u32 com_core_clk_en; + u32 com_coreclk_div; + u32 com_vco_tune_ctrl; + + u32 tx_lx_tx_drv_lvl[HDMI_NUM_TX_CHANNEL]; + u32 tx_lx_tx_emp_post1_lvl[HDMI_NUM_TX_CHANNEL]; + u32 tx_lx_vmode_ctrl1[HDMI_NUM_TX_CHANNEL]; + u32 tx_lx_vmode_ctrl2[HDMI_NUM_TX_CHANNEL]; + u32 tx_lx_res_code_lane_tx[HDMI_NUM_TX_CHANNEL]; + u32 tx_lx_hp_pd_enables[HDMI_NUM_TX_CHANNEL]; + + u32 phy_mode; +}; + +struct hdmi_8996_post_divider { + u64 vco_freq; + int hsclk_divsel; + int vco_ratio; + int tx_band_sel; + int half_rate_mode; +}; + +static inline struct hdmi_phy *pll_get_phy(struct hdmi_pll_8996 *pll) +{ + return platform_get_drvdata(pll->pdev); +} + +static inline void hdmi_pll_write(struct hdmi_pll_8996 *pll, int offset, + u32 data) +{ + msm_writel(data, pll->mmio_qserdes_com + offset); +} + +static inline u32 hdmi_pll_read(struct hdmi_pll_8996 *pll, int offset) +{ + return msm_readl(pll->mmio_qserdes_com + offset); +} + +static inline void hdmi_tx_chan_write(struct hdmi_pll_8996 *pll, int channel, + int offset, int data) +{ + msm_writel(data, pll->mmio_qserdes_tx[channel] + offset); +} + +static inline u32 pll_get_cpctrl(u64 frac_start, unsigned long ref_clk, + bool gen_ssc) +{ + if ((frac_start != 0) || gen_ssc) + return (11000000 / (ref_clk / 20)); + + return 0x23; +} + +static inline u32 pll_get_rctrl(u64 frac_start, bool gen_ssc) +{ + if ((frac_start != 0) || gen_ssc) + return 0x16; + + return 0x10; +} + +static inline u32 pll_get_cctrl(u64 frac_start, bool gen_ssc) +{ + if ((frac_start != 0) || gen_ssc) + return 0x28; + + return 0x1; +} + +static inline u32 pll_get_integloop_gain(u64 frac_start, u64 bclk, u32 ref_clk, + bool gen_ssc) +{ + int digclk_divsel = bclk >= HDMI_DIG_FREQ_BIT_CLK_THRESHOLD ? 1 : 2; + u64 base; + + if ((frac_start != 0) || gen_ssc) + base = (64 * ref_clk) / HDMI_DEFAULT_REF_CLOCK; + else + base = (1022 * ref_clk) / 100; + + base <<= digclk_divsel; + + return (base <= 2046 ? base : 2046); +} + +static inline u32 pll_get_pll_cmp(u64 fdata, unsigned long ref_clk) +{ + u64 dividend = HDMI_PLL_CMP_CNT * fdata; + u32 divisor = ref_clk * 10; + u32 rem; + + rem = do_div(dividend, divisor); + if (rem > (divisor >> 1)) + dividend++; + + return dividend - 1; +} + +static inline u64 pll_cmp_to_fdata(u32 pll_cmp, unsigned long ref_clk) +{ + u64 fdata = ((u64)pll_cmp) * ref_clk * 10; + + do_div(fdata, HDMI_PLL_CMP_CNT); + + return fdata; +} + +static int pll_get_post_div(struct hdmi_8996_post_divider *pd, u64 bclk) +{ + int ratio[] = { 2, 3, 4, 5, 6, 9, 10, 12, 14, 15, 20, 21, 25, 28, 35 }; + int hs_divsel[] = { 0, 4, 8, 12, 1, 5, 2, 9, 3, 13, 10, 7, 14, 11, 15 }; + int tx_band_sel[] = { 0, 1, 2, 3 }; + u64 vco_freq[60]; + u64 vco, vco_optimal; + int half_rate_mode = 0; + int vco_optimal_index, vco_freq_index; + int i, j; + +retry: + vco_optimal = HDMI_VCO_MAX_FREQ; + vco_optimal_index = -1; + vco_freq_index = 0; + for (i = 0; i < 15; i++) { + for (j = 0; j < 4; j++) { + u32 ratio_mult = ratio[i] << tx_band_sel[j]; + + vco = bclk >> half_rate_mode; + vco *= ratio_mult; + vco_freq[vco_freq_index++] = vco; + } + } + + for (i = 0; i < 60; i++) { + u64 vco_tmp = vco_freq[i]; + + if ((vco_tmp >= HDMI_VCO_MIN_FREQ) && + (vco_tmp <= vco_optimal)) { + vco_optimal = vco_tmp; + vco_optimal_index = i; + } + } + + if (vco_optimal_index == -1) { + if (!half_rate_mode) { + half_rate_mode = 1; + goto retry; + } + } else { + pd->vco_freq = vco_optimal; + pd->tx_band_sel = tx_band_sel[vco_optimal_index % 4]; + pd->vco_ratio = ratio[vco_optimal_index / 4]; + pd->hsclk_divsel = hs_divsel[vco_optimal_index / 4]; + + return 0; + } + + return -EINVAL; +} + +static int pll_calculate(unsigned long pix_clk, unsigned long ref_clk, + struct hdmi_8996_phy_pll_reg_cfg *cfg) +{ + struct hdmi_8996_post_divider pd; + u64 bclk; + u64 tmds_clk; + u64 dec_start; + u64 frac_start; + u64 fdata; + u32 pll_divisor; + u32 rem; + u32 cpctrl; + u32 rctrl; + u32 cctrl; + u32 integloop_gain; + u32 pll_cmp; + int i, ret; + + /* bit clk = 10 * pix_clk */ + bclk = ((u64)pix_clk) * 10; + + if (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD) + tmds_clk = pix_clk >> 2; + else + tmds_clk = pix_clk; + + ret = pll_get_post_div(&pd, bclk); + if (ret) + return ret; + + dec_start = pd.vco_freq; + pll_divisor = 4 * ref_clk; + do_div(dec_start, pll_divisor); + + frac_start = pd.vco_freq * (1 << 20); + + rem = do_div(frac_start, pll_divisor); + frac_start -= dec_start * (1 << 20); + if (rem > (pll_divisor >> 1)) + frac_start++; + + cpctrl = pll_get_cpctrl(frac_start, ref_clk, false); + rctrl = pll_get_rctrl(frac_start, false); + cctrl = pll_get_cctrl(frac_start, false); + integloop_gain = pll_get_integloop_gain(frac_start, bclk, + ref_clk, false); + + fdata = pd.vco_freq; + do_div(fdata, pd.vco_ratio); + + pll_cmp = pll_get_pll_cmp(fdata, ref_clk); + + DBG("VCO freq: %llu", pd.vco_freq); + DBG("fdata: %llu", fdata); + DBG("pix_clk: %lu", pix_clk); + DBG("tmds clk: %llu", tmds_clk); + DBG("HSCLK_SEL: %d", pd.hsclk_divsel); + DBG("DEC_START: %llu", dec_start); + DBG("DIV_FRAC_START: %llu", frac_start); + DBG("PLL_CPCTRL: %u", cpctrl); + DBG("PLL_RCTRL: %u", rctrl); + DBG("PLL_CCTRL: %u", cctrl); + DBG("INTEGLOOP_GAIN: %u", integloop_gain); + DBG("TX_BAND: %d", pd.tx_band_sel); + DBG("PLL_CMP: %u", pll_cmp); + + /* Convert these values to register specific values */ + if (bclk > HDMI_DIG_FREQ_BIT_CLK_THRESHOLD) + cfg->com_svs_mode_clk_sel = 1; + else + cfg->com_svs_mode_clk_sel = 2; + + cfg->com_hsclk_sel = (0x20 | pd.hsclk_divsel); + cfg->com_pll_cctrl_mode0 = cctrl; + cfg->com_pll_rctrl_mode0 = rctrl; + cfg->com_cp_ctrl_mode0 = cpctrl; + cfg->com_dec_start_mode0 = dec_start; + cfg->com_div_frac_start1_mode0 = (frac_start & 0xff); + cfg->com_div_frac_start2_mode0 = ((frac_start & 0xff00) >> 8); + cfg->com_div_frac_start3_mode0 = ((frac_start & 0xf0000) >> 16); + cfg->com_integloop_gain0_mode0 = (integloop_gain & 0xff); + cfg->com_integloop_gain1_mode0 = ((integloop_gain & 0xf00) >> 8); + cfg->com_lock_cmp1_mode0 = (pll_cmp & 0xff); + cfg->com_lock_cmp2_mode0 = ((pll_cmp & 0xff00) >> 8); + cfg->com_lock_cmp3_mode0 = ((pll_cmp & 0x30000) >> 16); + cfg->com_lock_cmp_en = 0x0; + cfg->com_core_clk_en = 0x2c; + cfg->com_coreclk_div = HDMI_CORECLK_DIV; + cfg->phy_mode = (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD) ? 0x10 : 0x0; + cfg->com_vco_tune_ctrl = 0x0; + + cfg->tx_lx_lane_mode[0] = + cfg->tx_lx_lane_mode[2] = 0x43; + + cfg->tx_lx_hp_pd_enables[0] = + cfg->tx_lx_hp_pd_enables[1] = + cfg->tx_lx_hp_pd_enables[2] = 0x0c; + cfg->tx_lx_hp_pd_enables[3] = 0x3; + + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) + cfg->tx_lx_tx_band[i] = pd.tx_band_sel + 4; + + if (bclk > HDMI_HIGH_FREQ_BIT_CLK_THRESHOLD) { + cfg->tx_lx_tx_drv_lvl[0] = + cfg->tx_lx_tx_drv_lvl[1] = + cfg->tx_lx_tx_drv_lvl[2] = 0x25; + cfg->tx_lx_tx_drv_lvl[3] = 0x22; + + cfg->tx_lx_tx_emp_post1_lvl[0] = + cfg->tx_lx_tx_emp_post1_lvl[1] = + cfg->tx_lx_tx_emp_post1_lvl[2] = 0x23; + cfg->tx_lx_tx_emp_post1_lvl[3] = 0x27; + + cfg->tx_lx_vmode_ctrl1[0] = + cfg->tx_lx_vmode_ctrl1[1] = + cfg->tx_lx_vmode_ctrl1[2] = + cfg->tx_lx_vmode_ctrl1[3] = 0x00; + + cfg->tx_lx_vmode_ctrl2[0] = + cfg->tx_lx_vmode_ctrl2[1] = + cfg->tx_lx_vmode_ctrl2[2] = 0x0D; + + cfg->tx_lx_vmode_ctrl2[3] = 0x00; + } else if (bclk > HDMI_MID_FREQ_BIT_CLK_THRESHOLD) { + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) { + cfg->tx_lx_tx_drv_lvl[i] = 0x25; + cfg->tx_lx_tx_emp_post1_lvl[i] = 0x23; + cfg->tx_lx_vmode_ctrl1[i] = 0x00; + } + + cfg->tx_lx_vmode_ctrl2[0] = + cfg->tx_lx_vmode_ctrl2[1] = + cfg->tx_lx_vmode_ctrl2[2] = 0x0D; + cfg->tx_lx_vmode_ctrl2[3] = 0x00; + } else { + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) { + cfg->tx_lx_tx_drv_lvl[i] = 0x20; + cfg->tx_lx_tx_emp_post1_lvl[i] = 0x20; + cfg->tx_lx_vmode_ctrl1[i] = 0x00; + cfg->tx_lx_vmode_ctrl2[i] = 0x0E; + } + } + + DBG("com_svs_mode_clk_sel = 0x%x", cfg->com_svs_mode_clk_sel); + DBG("com_hsclk_sel = 0x%x", cfg->com_hsclk_sel); + DBG("com_lock_cmp_en = 0x%x", cfg->com_lock_cmp_en); + DBG("com_pll_cctrl_mode0 = 0x%x", cfg->com_pll_cctrl_mode0); + DBG("com_pll_rctrl_mode0 = 0x%x", cfg->com_pll_rctrl_mode0); + DBG("com_cp_ctrl_mode0 = 0x%x", cfg->com_cp_ctrl_mode0); + DBG("com_dec_start_mode0 = 0x%x", cfg->com_dec_start_mode0); + DBG("com_div_frac_start1_mode0 = 0x%x", cfg->com_div_frac_start1_mode0); + DBG("com_div_frac_start2_mode0 = 0x%x", cfg->com_div_frac_start2_mode0); + DBG("com_div_frac_start3_mode0 = 0x%x", cfg->com_div_frac_start3_mode0); + DBG("com_integloop_gain0_mode0 = 0x%x", cfg->com_integloop_gain0_mode0); + DBG("com_integloop_gain1_mode0 = 0x%x", cfg->com_integloop_gain1_mode0); + DBG("com_lock_cmp1_mode0 = 0x%x", cfg->com_lock_cmp1_mode0); + DBG("com_lock_cmp2_mode0 = 0x%x", cfg->com_lock_cmp2_mode0); + DBG("com_lock_cmp3_mode0 = 0x%x", cfg->com_lock_cmp3_mode0); + DBG("com_core_clk_en = 0x%x", cfg->com_core_clk_en); + DBG("com_coreclk_div = 0x%x", cfg->com_coreclk_div); + DBG("phy_mode = 0x%x", cfg->phy_mode); + + DBG("tx_l0_lane_mode = 0x%x", cfg->tx_lx_lane_mode[0]); + DBG("tx_l2_lane_mode = 0x%x", cfg->tx_lx_lane_mode[2]); + + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) { + DBG("tx_l%d_tx_band = 0x%x", i, cfg->tx_lx_tx_band[i]); + DBG("tx_l%d_tx_drv_lvl = 0x%x", i, cfg->tx_lx_tx_drv_lvl[i]); + DBG("tx_l%d_tx_emp_post1_lvl = 0x%x", i, + cfg->tx_lx_tx_emp_post1_lvl[i]); + DBG("tx_l%d_vmode_ctrl1 = 0x%x", i, cfg->tx_lx_vmode_ctrl1[i]); + DBG("tx_l%d_vmode_ctrl2 = 0x%x", i, cfg->tx_lx_vmode_ctrl2[i]); + } + + return 0; +} + +static int hdmi_8996_pll_set_clk_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw); + struct hdmi_phy *phy = pll_get_phy(pll); + struct hdmi_8996_phy_pll_reg_cfg cfg; + int i, ret; + + memset(&cfg, 0x00, sizeof(cfg)); + + ret = pll_calculate(rate, parent_rate, &cfg); + if (ret) { + DRM_ERROR("PLL calculation failed\n"); + return ret; + } + + /* Initially shut down PHY */ + DBG("Disabling PHY"); + hdmi_phy_write(phy, REG_HDMI_8996_PHY_PD_CTL, 0x0); + udelay(500); + + /* Power up sequence */ + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BG_CTRL, 0x04); + + hdmi_phy_write(phy, REG_HDMI_8996_PHY_PD_CTL, 0x1); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_RESETSM_CNTRL, 0x20); + hdmi_phy_write(phy, REG_HDMI_8996_PHY_TX0_TX1_LANE_CTL, 0x0F); + hdmi_phy_write(phy, REG_HDMI_8996_PHY_TX2_TX3_LANE_CTL, 0x0F); + + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) { + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_CLKBUF_ENABLE, + 0x03); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_TX_BAND, + cfg.tx_lx_tx_band[i]); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_RESET_TSYNC_EN, + 0x03); + } + + hdmi_tx_chan_write(pll, 0, REG_HDMI_PHY_QSERDES_TX_LX_LANE_MODE, + cfg.tx_lx_lane_mode[0]); + hdmi_tx_chan_write(pll, 2, REG_HDMI_PHY_QSERDES_TX_LX_LANE_MODE, + cfg.tx_lx_lane_mode[2]); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SYSCLK_BUF_ENABLE, 0x1E); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BIAS_EN_CLKBUFLR_EN, 0x07); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SYSCLK_EN_SEL, 0x37); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SYS_CLK_CTRL, 0x02); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CLK_ENABLE1, 0x0E); + + /* Bypass VCO calibration */ + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SVS_MODE_CLK_SEL, + cfg.com_svs_mode_clk_sel); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BG_TRIM, 0x0F); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_PLL_IVCO, 0x0F); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_VCO_TUNE_CTRL, + cfg.com_vco_tune_ctrl); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_BG_CTRL, 0x06); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CLK_SELECT, 0x30); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_HSCLK_SEL, + cfg.com_hsclk_sel); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP_EN, + cfg.com_lock_cmp_en); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_PLL_CCTRL_MODE0, + cfg.com_pll_cctrl_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_PLL_RCTRL_MODE0, + cfg.com_pll_rctrl_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CP_CTRL_MODE0, + cfg.com_cp_ctrl_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DEC_START_MODE0, + cfg.com_dec_start_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DIV_FRAC_START1_MODE0, + cfg.com_div_frac_start1_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DIV_FRAC_START2_MODE0, + cfg.com_div_frac_start2_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_DIV_FRAC_START3_MODE0, + cfg.com_div_frac_start3_mode0); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_INTEGLOOP_GAIN0_MODE0, + cfg.com_integloop_gain0_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_INTEGLOOP_GAIN1_MODE0, + cfg.com_integloop_gain1_mode0); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP1_MODE0, + cfg.com_lock_cmp1_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP2_MODE0, + cfg.com_lock_cmp2_mode0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP3_MODE0, + cfg.com_lock_cmp3_mode0); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_VCO_TUNE_MAP, 0x00); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CORE_CLK_EN, + cfg.com_core_clk_en); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CORECLK_DIV, + cfg.com_coreclk_div); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_CMN_CONFIG, 0x02); + + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_RESCODE_DIV_NUM, 0x15); + + /* TX lanes setup (TX 0/1/2/3) */ + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) { + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_TX_DRV_LVL, + cfg.tx_lx_tx_drv_lvl[i]); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_TX_EMP_POST1_LVL, + cfg.tx_lx_tx_emp_post1_lvl[i]); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_VMODE_CTRL1, + cfg.tx_lx_vmode_ctrl1[i]); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_VMODE_CTRL2, + cfg.tx_lx_vmode_ctrl2[i]); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_TX_DRV_LVL_OFFSET, + 0x00); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_RES_CODE_LANE_OFFSET, + 0x00); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_TRAN_DRVR_EMP_EN, + 0x03); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_PARRATE_REC_DETECT_IDLE_EN, + 0x40); + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_HP_PD_ENABLES, + cfg.tx_lx_hp_pd_enables[i]); + } + + hdmi_phy_write(phy, REG_HDMI_8996_PHY_MODE, cfg.phy_mode); + hdmi_phy_write(phy, REG_HDMI_8996_PHY_PD_CTL, 0x1F); + + /* + * Ensure that vco configuration gets flushed to hardware before + * enabling the PLL + */ + wmb(); + + return 0; +} + +static int hdmi_8996_phy_ready_status(struct hdmi_phy *phy) +{ + u32 nb_tries = HDMI_PLL_POLL_MAX_READS; + unsigned long timeout = HDMI_PLL_POLL_TIMEOUT_US; + u32 status; + int phy_ready = 0; + + DBG("Waiting for PHY ready"); + + while (nb_tries--) { + status = hdmi_phy_read(phy, REG_HDMI_8996_PHY_STATUS); + phy_ready = status & BIT(0); + + if (phy_ready) + break; + + udelay(timeout); + } + + DBG("PHY is %sready", phy_ready ? "" : "*not* "); + + return phy_ready; +} + +static int hdmi_8996_pll_lock_status(struct hdmi_pll_8996 *pll) +{ + u32 status; + int nb_tries = HDMI_PLL_POLL_MAX_READS; + unsigned long timeout = HDMI_PLL_POLL_TIMEOUT_US; + int pll_locked = 0; + + DBG("Waiting for PLL lock"); + + while (nb_tries--) { + status = hdmi_pll_read(pll, + REG_HDMI_PHY_QSERDES_COM_C_READY_STATUS); + pll_locked = status & BIT(0); + + if (pll_locked) + break; + + udelay(timeout); + } + + DBG("HDMI PLL is %slocked", pll_locked ? "" : "*not* "); + + return pll_locked; +} + +static int hdmi_8996_pll_prepare(struct clk_hw *hw) +{ + struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw); + struct hdmi_phy *phy = pll_get_phy(pll); + int i, ret = 0; + + hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x1); + udelay(100); + + hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x19); + udelay(100); + + ret = hdmi_8996_pll_lock_status(pll); + if (!ret) + return ret; + + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) + hdmi_tx_chan_write(pll, i, + REG_HDMI_PHY_QSERDES_TX_LX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN, + 0x6F); + + /* Disable SSC */ + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_PER1, 0x0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_PER2, 0x0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_STEP_SIZE1, 0x0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_STEP_SIZE2, 0x0); + hdmi_pll_write(pll, REG_HDMI_PHY_QSERDES_COM_SSC_EN_CENTER, 0x2); + + ret = hdmi_8996_phy_ready_status(phy); + if (!ret) + return ret; + + /* Restart the retiming buffer */ + hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x18); + udelay(1); + hdmi_phy_write(phy, REG_HDMI_8996_PHY_CFG, 0x19); + + return 0; +} + +static long hdmi_8996_pll_round_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long *parent_rate) +{ + if (rate < HDMI_PCLK_MIN_FREQ) + return HDMI_PCLK_MIN_FREQ; + else if (rate > HDMI_PCLK_MAX_FREQ) + return HDMI_PCLK_MAX_FREQ; + else + return rate; +} + +static unsigned long hdmi_8996_pll_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw); + u64 fdata; + u32 cmp1, cmp2, cmp3, pll_cmp; + + cmp1 = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP1_MODE0); + cmp2 = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP2_MODE0); + cmp3 = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_LOCK_CMP3_MODE0); + + pll_cmp = cmp1 | (cmp2 << 8) | (cmp3 << 16); + + fdata = pll_cmp_to_fdata(pll_cmp + 1, parent_rate); + + do_div(fdata, 10); + + return fdata; +} + +static void hdmi_8996_pll_unprepare(struct clk_hw *hw) +{ +} + +static int hdmi_8996_pll_is_enabled(struct clk_hw *hw) +{ + struct hdmi_pll_8996 *pll = hw_clk_to_pll(hw); + u32 status; + int pll_locked; + + status = hdmi_pll_read(pll, REG_HDMI_PHY_QSERDES_COM_C_READY_STATUS); + pll_locked = status & BIT(0); + + return pll_locked; +} + +static struct clk_ops hdmi_8996_pll_ops = { + .set_rate = hdmi_8996_pll_set_clk_rate, + .round_rate = hdmi_8996_pll_round_rate, + .recalc_rate = hdmi_8996_pll_recalc_rate, + .prepare = hdmi_8996_pll_prepare, + .unprepare = hdmi_8996_pll_unprepare, + .is_enabled = hdmi_8996_pll_is_enabled, +}; + +static const char * const hdmi_pll_parents[] = { + "xo", +}; + +static struct clk_init_data pll_init = { + .name = "hdmipll", + .ops = &hdmi_8996_pll_ops, + .parent_names = hdmi_pll_parents, + .num_parents = ARRAY_SIZE(hdmi_pll_parents), +}; + +int hdmi_pll_8996_init(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct hdmi_pll_8996 *pll; + struct clk *clk; + int i; + + pll = devm_kzalloc(dev, sizeof(*pll), GFP_KERNEL); + if (!pll) + return -ENOMEM; + + pll->pdev = pdev; + + pll->mmio_qserdes_com = msm_ioremap(pdev, "hdmi_pll", "HDMI_PLL"); + if (IS_ERR(pll->mmio_qserdes_com)) { + dev_err(dev, "failed to map pll base\n"); + return -ENOMEM; + } + + for (i = 0; i < HDMI_NUM_TX_CHANNEL; i++) { + char name[32], label[32]; + + snprintf(name, sizeof(name), "hdmi_tx_l%d", i); + snprintf(label, sizeof(label), "HDMI_TX_L%d", i); + + pll->mmio_qserdes_tx[i] = msm_ioremap(pdev, name, label); + if (IS_ERR(pll->mmio_qserdes_tx[i])) { + dev_err(dev, "failed to map pll base\n"); + return -ENOMEM; + } + } + pll->clk_hw.init = &pll_init; + + clk = devm_clk_register(dev, &pll->clk_hw); + if (IS_ERR(clk)) { + dev_err(dev, "failed to register pll clock\n"); + return -EINVAL; + } + + return 0; +} + +static const char * const hdmi_phy_8996_reg_names[] = { + "vddio", + "vcca", +}; + +static const char * const hdmi_phy_8996_clk_names[] = { + "mmagic_iface_clk", + "iface_clk", + "ref_clk", +}; + +const struct hdmi_phy_cfg hdmi_phy_8996_cfg = { + .type = MSM_HDMI_PHY_8996, + .reg_names = hdmi_phy_8996_reg_names, + .num_regs = ARRAY_SIZE(hdmi_phy_8996_reg_names), + .clk_names = hdmi_phy_8996_clk_names, + .num_clks = ARRAY_SIZE(hdmi_phy_8996_clk_names), +};