diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_ctrl.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_ctrl.c | 2770 |
1 files changed, 2770 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c new file mode 100644 index 000000000000..cbcc7c2f0ffc --- /dev/null +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -0,0 +1,2770 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved. + */ + +#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__ + +#include <linux/types.h> +#include <linux/clk.h> +#include <linux/completion.h> +#include <linux/delay.h> +#include <linux/iopoll.h> +#include <linux/phy/phy.h> +#include <linux/phy/phy-dp.h> +#include <linux/pm_opp.h> +#include <linux/rational.h> +#include <linux/string_choices.h> + +#include <drm/display/drm_dp_helper.h> +#include <drm/drm_device.h> +#include <drm/drm_fixed.h> +#include <drm/drm_print.h> + +#include "dp_reg.h" +#include "dp_ctrl.h" +#include "dp_link.h" + +#define POLLING_SLEEP_US 1000 +#define POLLING_TIMEOUT_US 10000 + +#define DP_KHZ_TO_HZ 1000 +#define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) /* 30 ms */ +#define PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES (300 * HZ / 1000) /* 300 ms */ +#define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2) + +#define DP_INTERRUPT_STATUS_ACK_SHIFT 1 +#define DP_INTERRUPT_STATUS_MASK_SHIFT 2 + +#define DP_INTERRUPT_STATUS1 \ + (DP_INTR_AUX_XFER_DONE| \ + DP_INTR_WRONG_ADDR | DP_INTR_TIMEOUT | \ + DP_INTR_NACK_DEFER | DP_INTR_WRONG_DATA_CNT | \ + DP_INTR_I2C_NACK | DP_INTR_I2C_DEFER | \ + DP_INTR_PLL_UNLOCKED | DP_INTR_AUX_ERROR) + +#define DP_INTERRUPT_STATUS1_ACK \ + (DP_INTERRUPT_STATUS1 << DP_INTERRUPT_STATUS_ACK_SHIFT) +#define DP_INTERRUPT_STATUS1_MASK \ + (DP_INTERRUPT_STATUS1 << DP_INTERRUPT_STATUS_MASK_SHIFT) + +#define DP_INTERRUPT_STATUS2 \ + (DP_INTR_READY_FOR_VIDEO | DP_INTR_IDLE_PATTERN_SENT | \ + DP_INTR_FRAME_END | DP_INTR_CRC_UPDATED) + +#define DP_INTERRUPT_STATUS2_ACK \ + (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_ACK_SHIFT) +#define DP_INTERRUPT_STATUS2_MASK \ + (DP_INTERRUPT_STATUS2 << DP_INTERRUPT_STATUS_MASK_SHIFT) + +#define DP_INTERRUPT_STATUS4 \ + (PSR_UPDATE_INT | PSR_CAPTURE_INT | PSR_EXIT_INT | \ + PSR_UPDATE_ERROR_INT | PSR_WAKE_ERROR_INT) + +#define DP_INTERRUPT_MASK4 \ + (PSR_UPDATE_MASK | PSR_CAPTURE_MASK | PSR_EXIT_MASK | \ + PSR_UPDATE_ERROR_MASK | PSR_WAKE_ERROR_MASK) + +#define DP_CTRL_INTR_READY_FOR_VIDEO BIT(0) +#define DP_CTRL_INTR_IDLE_PATTERN_SENT BIT(3) + +#define MR_LINK_TRAINING1 0x8 +#define MR_LINK_SYMBOL_ERM 0x80 +#define MR_LINK_PRBS7 0x100 +#define MR_LINK_CUSTOM80 0x200 +#define MR_LINK_TRAINING4 0x40 + +enum { + DP_TRAINING_NONE, + DP_TRAINING_1, + DP_TRAINING_2, +}; + +struct msm_dp_tu_calc_input { + u64 lclk; /* 162, 270, 540 and 810 */ + u64 pclk_khz; /* in KHz */ + u64 hactive; /* active h-width */ + u64 hporch; /* bp + fp + pulse */ + int nlanes; /* no.of.lanes */ + int bpp; /* bits */ + int pixel_enc; /* 444, 420, 422 */ + int dsc_en; /* dsc on/off */ + int async_en; /* async mode */ + int fec_en; /* fec */ + int compress_ratio; /* 2:1 = 200, 3:1 = 300, 3.75:1 = 375 */ + int num_of_dsc_slices; /* number of slices per line */ +}; + +struct msm_dp_vc_tu_mapping_table { + u32 vic; + u8 lanes; + u8 lrate; /* DP_LINK_RATE -> 162(6), 270(10), 540(20), 810 (30) */ + u8 bpp; + u8 valid_boundary_link; + u16 delay_start_link; + bool boundary_moderation_en; + u8 valid_lower_boundary_link; + u8 upper_boundary_count; + u8 lower_boundary_count; + u8 tu_size_minus1; +}; + +struct msm_dp_ctrl_private { + struct msm_dp_ctrl msm_dp_ctrl; + struct drm_device *drm_dev; + struct device *dev; + struct drm_dp_aux *aux; + struct msm_dp_panel *panel; + struct msm_dp_link *link; + void __iomem *ahb_base; + void __iomem *link_base; + + struct phy *phy; + + unsigned int num_core_clks; + struct clk_bulk_data *core_clks; + + unsigned int num_link_clks; + struct clk_bulk_data *link_clks; + + struct clk *pixel_clk; + + union phy_configure_opts phy_opts; + + struct completion idle_comp; + struct completion psr_op_comp; + struct completion video_comp; + + u32 hw_revision; + + bool core_clks_on; + bool link_clks_on; + bool stream_clks_on; +}; + +static inline u32 msm_dp_read_ahb(const struct msm_dp_ctrl_private *ctrl, u32 offset) +{ + return readl_relaxed(ctrl->ahb_base + offset); +} + +static inline void msm_dp_write_ahb(struct msm_dp_ctrl_private *ctrl, + u32 offset, u32 data) +{ + /* + * To make sure phy reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, ctrl->ahb_base + offset); +} + +static inline u32 msm_dp_read_link(struct msm_dp_ctrl_private *ctrl, u32 offset) +{ + return readl_relaxed(ctrl->link_base + offset); +} + +static inline void msm_dp_write_link(struct msm_dp_ctrl_private *ctrl, + u32 offset, u32 data) +{ + /* + * To make sure link reg writes happens before any other operation, + * this function uses writel() instread of writel_relaxed() + */ + writel(data, ctrl->link_base + offset); +} + +static int msm_dp_aux_link_configure(struct drm_dp_aux *aux, + struct msm_dp_link_info *link) +{ + u8 values[2]; + int err; + + values[0] = drm_dp_link_rate_to_bw_code(link->rate); + values[1] = link->num_lanes; + + if (link->capabilities & DP_LINK_CAP_ENHANCED_FRAMING) + values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN; + + err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values)); + if (err < 0) + return err; + + return 0; +} + +/* + * NOTE: resetting DP controller will also clear any pending HPD related interrupts + */ +void msm_dp_ctrl_reset(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl = + container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + u32 sw_reset; + + sw_reset = msm_dp_read_ahb(ctrl, REG_DP_SW_RESET); + + sw_reset |= DP_SW_RESET; + msm_dp_write_ahb(ctrl, REG_DP_SW_RESET, sw_reset); + usleep_range(1000, 1100); /* h/w recommended delay */ + + sw_reset &= ~DP_SW_RESET; + msm_dp_write_ahb(ctrl, REG_DP_SW_RESET, sw_reset); + + if (!ctrl->hw_revision) { + ctrl->hw_revision = msm_dp_read_ahb(ctrl, REG_DP_HW_VERSION); + ctrl->panel->hw_revision = ctrl->hw_revision; + } +} + +static u32 msm_dp_ctrl_get_aux_interrupt(struct msm_dp_ctrl_private *ctrl) +{ + u32 intr, intr_ack; + + intr = msm_dp_read_ahb(ctrl, REG_DP_INTR_STATUS); + intr &= ~DP_INTERRUPT_STATUS1_MASK; + intr_ack = (intr & DP_INTERRUPT_STATUS1) + << DP_INTERRUPT_STATUS_ACK_SHIFT; + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS, + intr_ack | DP_INTERRUPT_STATUS1_MASK); + + return intr; + +} + +static u32 msm_dp_ctrl_get_interrupt(struct msm_dp_ctrl_private *ctrl) +{ + u32 intr, intr_ack; + + intr = msm_dp_read_ahb(ctrl, REG_DP_INTR_STATUS2); + intr &= ~DP_INTERRUPT_STATUS2_MASK; + intr_ack = (intr & DP_INTERRUPT_STATUS2) + << DP_INTERRUPT_STATUS_ACK_SHIFT; + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS2, + intr_ack | DP_INTERRUPT_STATUS2_MASK); + + return intr; +} + +void msm_dp_ctrl_enable_irq(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl = + container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS, + DP_INTERRUPT_STATUS1_MASK); + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS2, + DP_INTERRUPT_STATUS2_MASK); +} + +void msm_dp_ctrl_disable_irq(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl = + container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS, 0x00); + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS2, 0x00); +} + +static u32 msm_dp_ctrl_get_psr_interrupt(struct msm_dp_ctrl_private *ctrl) +{ + u32 intr, intr_ack; + + intr = msm_dp_read_ahb(ctrl, REG_DP_INTR_STATUS4); + intr_ack = (intr & DP_INTERRUPT_STATUS4) + << DP_INTERRUPT_STATUS_ACK_SHIFT; + msm_dp_write_ahb(ctrl, REG_DP_INTR_STATUS4, intr_ack); + + return intr; +} + +static void msm_dp_ctrl_config_psr_interrupt(struct msm_dp_ctrl_private *ctrl) +{ + msm_dp_write_ahb(ctrl, REG_DP_INTR_MASK4, DP_INTERRUPT_MASK4); +} + +static void msm_dp_ctrl_psr_mainlink_enable(struct msm_dp_ctrl_private *ctrl) +{ + u32 val; + + val = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + val |= DP_MAINLINK_CTRL_ENABLE; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, val); +} + +static void msm_dp_ctrl_psr_mainlink_disable(struct msm_dp_ctrl_private *ctrl) +{ + u32 val; + + val = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + val &= ~DP_MAINLINK_CTRL_ENABLE; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, val); +} + +static void msm_dp_ctrl_mainlink_enable(struct msm_dp_ctrl_private *ctrl) +{ + u32 mainlink_ctrl; + + drm_dbg_dp(ctrl->drm_dev, "enable\n"); + + mainlink_ctrl = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + + mainlink_ctrl &= ~(DP_MAINLINK_CTRL_RESET | + DP_MAINLINK_CTRL_ENABLE); + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, mainlink_ctrl); + + mainlink_ctrl |= DP_MAINLINK_CTRL_RESET; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, mainlink_ctrl); + + mainlink_ctrl &= ~DP_MAINLINK_CTRL_RESET; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, mainlink_ctrl); + + mainlink_ctrl |= (DP_MAINLINK_CTRL_ENABLE | + DP_MAINLINK_FB_BOUNDARY_SEL); + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, mainlink_ctrl); +} + +static void msm_dp_ctrl_mainlink_disable(struct msm_dp_ctrl_private *ctrl) +{ + u32 mainlink_ctrl; + + drm_dbg_dp(ctrl->drm_dev, "disable\n"); + + mainlink_ctrl = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + mainlink_ctrl &= ~DP_MAINLINK_CTRL_ENABLE; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, mainlink_ctrl); +} + +static void msm_dp_setup_peripheral_flush(struct msm_dp_ctrl_private *ctrl) +{ + u32 mainlink_ctrl; + + mainlink_ctrl = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + + if (ctrl->hw_revision >= DP_HW_VERSION_1_2) + mainlink_ctrl |= DP_MAINLINK_FLUSH_MODE_SDE_PERIPH_UPDATE; + else + mainlink_ctrl |= DP_MAINLINK_FLUSH_MODE_UPDATE_SDP; + + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, mainlink_ctrl); +} + +static bool msm_dp_ctrl_mainlink_ready(struct msm_dp_ctrl_private *ctrl) +{ + u32 data; + int ret; + + /* Poll for mainlink ready status */ + ret = readl_poll_timeout(ctrl->link_base + REG_DP_MAINLINK_READY, + data, data & DP_MAINLINK_READY_FOR_VIDEO, + POLLING_SLEEP_US, POLLING_TIMEOUT_US); + if (ret < 0) { + DRM_ERROR("mainlink not ready\n"); + return false; + } + + return true; +} + +void msm_dp_ctrl_push_idle(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + reinit_completion(&ctrl->idle_comp); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, DP_STATE_CTRL_PUSH_IDLE); + + if (!wait_for_completion_timeout(&ctrl->idle_comp, + IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES)) + pr_warn("PUSH_IDLE pattern timedout\n"); + + drm_dbg_dp(ctrl->drm_dev, "mainlink off\n"); +} + +static void msm_dp_ctrl_config_ctrl(struct msm_dp_ctrl_private *ctrl) +{ + u32 config = 0, tbd; + const u8 *dpcd = ctrl->panel->dpcd; + + /* Default-> LSCLK DIV: 1/4 LCLK */ + config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT); + + if (ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420) + config |= DP_CONFIGURATION_CTRL_RGB_YUV; /* YUV420 */ + + /* Scrambler reset enable */ + if (drm_dp_alternate_scrambler_reset_cap(dpcd)) + config |= DP_CONFIGURATION_CTRL_ASSR; + + tbd = msm_dp_link_get_test_bits_depth(ctrl->link, + ctrl->panel->msm_dp_mode.bpp); + + config |= tbd << DP_CONFIGURATION_CTRL_BPC_SHIFT; + + /* Num of Lanes */ + config |= ((ctrl->link->link_params.num_lanes - 1) + << DP_CONFIGURATION_CTRL_NUM_OF_LANES_SHIFT); + + if (drm_dp_enhanced_frame_cap(dpcd)) + config |= DP_CONFIGURATION_CTRL_ENHANCED_FRAMING; + + config |= DP_CONFIGURATION_CTRL_P_INTERLACED; /* progressive video */ + + /* sync clock & static Mvid */ + config |= DP_CONFIGURATION_CTRL_STATIC_DYNAMIC_CN; + config |= DP_CONFIGURATION_CTRL_SYNC_ASYNC_CLK; + + if (ctrl->panel->psr_cap.version) + config |= DP_CONFIGURATION_CTRL_SEND_VSC; + + drm_dbg_dp(ctrl->drm_dev, "DP_CONFIGURATION_CTRL=0x%x\n", config); + + msm_dp_write_link(ctrl, REG_DP_CONFIGURATION_CTRL, config); +} + +static void msm_dp_ctrl_lane_mapping(struct msm_dp_ctrl_private *ctrl) +{ + u32 *lane_map = ctrl->link->lane_map; + u32 ln_mapping; + + ln_mapping = lane_map[0] << LANE0_MAPPING_SHIFT; + ln_mapping |= lane_map[1] << LANE1_MAPPING_SHIFT; + ln_mapping |= lane_map[2] << LANE2_MAPPING_SHIFT; + ln_mapping |= lane_map[3] << LANE3_MAPPING_SHIFT; + + msm_dp_write_link(ctrl, REG_DP_LOGICAL2PHYSICAL_LANE_MAPPING, + ln_mapping); +} + +static void msm_dp_ctrl_configure_source_params(struct msm_dp_ctrl_private *ctrl) +{ + u32 colorimetry_cfg, test_bits_depth, misc_val; + + msm_dp_ctrl_lane_mapping(ctrl); + msm_dp_setup_peripheral_flush(ctrl); + + msm_dp_ctrl_config_ctrl(ctrl); + + test_bits_depth = msm_dp_link_get_test_bits_depth(ctrl->link, ctrl->panel->msm_dp_mode.bpp); + colorimetry_cfg = msm_dp_link_get_colorimetry_config(ctrl->link); + + misc_val = msm_dp_read_link(ctrl, REG_DP_MISC1_MISC0); + + /* clear bpp bits */ + misc_val &= ~(0x07 << DP_MISC0_TEST_BITS_DEPTH_SHIFT); + misc_val |= colorimetry_cfg << DP_MISC0_COLORIMETRY_CFG_SHIFT; + misc_val |= test_bits_depth << DP_MISC0_TEST_BITS_DEPTH_SHIFT; + /* Configure clock to synchronous mode */ + misc_val |= DP_MISC0_SYNCHRONOUS_CLK; + + drm_dbg_dp(ctrl->drm_dev, "misc settings = 0x%x\n", misc_val); + msm_dp_write_link(ctrl, REG_DP_MISC1_MISC0, misc_val); + + msm_dp_panel_timing_cfg(ctrl->panel, ctrl->msm_dp_ctrl.wide_bus_en); +} + +/* + * The structure and few functions present below are IP/Hardware + * specific implementation. Most of the implementation will not + * have coding comments + */ +struct tu_algo_data { + s64 lclk_fp; + s64 pclk_fp; + s64 lwidth; + s64 lwidth_fp; + s64 hbp_relative_to_pclk; + s64 hbp_relative_to_pclk_fp; + int nlanes; + int bpp; + int pixelEnc; + int dsc_en; + int async_en; + int bpc; + + uint delay_start_link_extra_pixclk; + int extra_buffer_margin; + s64 ratio_fp; + s64 original_ratio_fp; + + s64 err_fp; + s64 n_err_fp; + s64 n_n_err_fp; + int tu_size; + int tu_size_desired; + int tu_size_minus1; + + int valid_boundary_link; + s64 resulting_valid_fp; + s64 total_valid_fp; + s64 effective_valid_fp; + s64 effective_valid_recorded_fp; + int n_tus; + int n_tus_per_lane; + int paired_tus; + int remainder_tus; + int remainder_tus_upper; + int remainder_tus_lower; + int extra_bytes; + int filler_size; + int delay_start_link; + + int extra_pclk_cycles; + int extra_pclk_cycles_in_link_clk; + s64 ratio_by_tu_fp; + s64 average_valid2_fp; + int new_valid_boundary_link; + int remainder_symbols_exist; + int n_symbols; + s64 n_remainder_symbols_per_lane_fp; + s64 last_partial_tu_fp; + s64 TU_ratio_err_fp; + + int n_tus_incl_last_incomplete_tu; + int extra_pclk_cycles_tmp; + int extra_pclk_cycles_in_link_clk_tmp; + int extra_required_bytes_new_tmp; + int filler_size_tmp; + int lower_filler_size_tmp; + int delay_start_link_tmp; + + bool boundary_moderation_en; + int boundary_mod_lower_err; + int upper_boundary_count; + int lower_boundary_count; + int i_upper_boundary_count; + int i_lower_boundary_count; + int valid_lower_boundary_link; + int even_distribution_BF; + int even_distribution_legacy; + int even_distribution; + int min_hblank_violated; + s64 delay_start_time_fp; + s64 hbp_time_fp; + s64 hactive_time_fp; + s64 diff_abs_fp; + + s64 ratio; +}; + +static int _tu_param_compare(s64 a, s64 b) +{ + u32 a_sign; + u32 b_sign; + s64 a_temp, b_temp, minus_1; + + if (a == b) + return 0; + + minus_1 = drm_fixp_from_fraction(-1, 1); + + a_sign = (a >> 32) & 0x80000000 ? 1 : 0; + + b_sign = (b >> 32) & 0x80000000 ? 1 : 0; + + if (a_sign > b_sign) + return 2; + else if (b_sign > a_sign) + return 1; + + if (!a_sign && !b_sign) { /* positive */ + if (a > b) + return 1; + else + return 2; + } else { /* negative */ + a_temp = drm_fixp_mul(a, minus_1); + b_temp = drm_fixp_mul(b, minus_1); + + if (a_temp > b_temp) + return 2; + else + return 1; + } +} + +static void msm_dp_panel_update_tu_timings(struct msm_dp_tu_calc_input *in, + struct tu_algo_data *tu) +{ + int nlanes = in->nlanes; + int dsc_num_slices = in->num_of_dsc_slices; + int dsc_num_bytes = 0; + int numerator; + s64 pclk_dsc_fp; + s64 dwidth_dsc_fp; + s64 hbp_dsc_fp; + + int tot_num_eoc_symbols = 0; + int tot_num_hor_bytes = 0; + int tot_num_dummy_bytes = 0; + int dwidth_dsc_bytes = 0; + int eoc_bytes = 0; + + s64 temp1_fp, temp2_fp, temp3_fp; + + tu->lclk_fp = drm_fixp_from_fraction(in->lclk, 1); + tu->pclk_fp = drm_fixp_from_fraction(in->pclk_khz, 1000); + tu->lwidth = in->hactive; + tu->hbp_relative_to_pclk = in->hporch; + tu->nlanes = in->nlanes; + tu->bpp = in->bpp; + tu->pixelEnc = in->pixel_enc; + tu->dsc_en = in->dsc_en; + tu->async_en = in->async_en; + tu->lwidth_fp = drm_fixp_from_fraction(in->hactive, 1); + tu->hbp_relative_to_pclk_fp = drm_fixp_from_fraction(in->hporch, 1); + + if (tu->pixelEnc == 420) { + temp1_fp = drm_fixp_from_fraction(2, 1); + tu->pclk_fp = drm_fixp_div(tu->pclk_fp, temp1_fp); + tu->lwidth_fp = drm_fixp_div(tu->lwidth_fp, temp1_fp); + tu->hbp_relative_to_pclk_fp = + drm_fixp_div(tu->hbp_relative_to_pclk_fp, 2); + } + + if (tu->pixelEnc == 422) { + switch (tu->bpp) { + case 24: + tu->bpp = 16; + tu->bpc = 8; + break; + case 30: + tu->bpp = 20; + tu->bpc = 10; + break; + default: + tu->bpp = 16; + tu->bpc = 8; + break; + } + } else { + tu->bpc = tu->bpp/3; + } + + if (!in->dsc_en) + goto fec_check; + + temp1_fp = drm_fixp_from_fraction(in->compress_ratio, 100); + temp2_fp = drm_fixp_from_fraction(in->bpp, 1); + temp3_fp = drm_fixp_div(temp2_fp, temp1_fp); + temp2_fp = drm_fixp_mul(tu->lwidth_fp, temp3_fp); + + temp1_fp = drm_fixp_from_fraction(8, 1); + temp3_fp = drm_fixp_div(temp2_fp, temp1_fp); + + numerator = drm_fixp2int(temp3_fp); + + dsc_num_bytes = numerator / dsc_num_slices; + eoc_bytes = dsc_num_bytes % nlanes; + tot_num_eoc_symbols = nlanes * dsc_num_slices; + tot_num_hor_bytes = dsc_num_bytes * dsc_num_slices; + tot_num_dummy_bytes = (nlanes - eoc_bytes) * dsc_num_slices; + + if (dsc_num_bytes == 0) + pr_info("incorrect no of bytes per slice=%d\n", dsc_num_bytes); + + dwidth_dsc_bytes = (tot_num_hor_bytes + + tot_num_eoc_symbols + + (eoc_bytes == 0 ? 0 : tot_num_dummy_bytes)); + + dwidth_dsc_fp = drm_fixp_from_fraction(dwidth_dsc_bytes, 3); + + temp2_fp = drm_fixp_mul(tu->pclk_fp, dwidth_dsc_fp); + temp1_fp = drm_fixp_div(temp2_fp, tu->lwidth_fp); + pclk_dsc_fp = temp1_fp; + + temp1_fp = drm_fixp_div(pclk_dsc_fp, tu->pclk_fp); + temp2_fp = drm_fixp_mul(tu->hbp_relative_to_pclk_fp, temp1_fp); + hbp_dsc_fp = temp2_fp; + + /* output */ + tu->pclk_fp = pclk_dsc_fp; + tu->lwidth_fp = dwidth_dsc_fp; + tu->hbp_relative_to_pclk_fp = hbp_dsc_fp; + +fec_check: + if (in->fec_en) { + temp1_fp = drm_fixp_from_fraction(976, 1000); /* 0.976 */ + tu->lclk_fp = drm_fixp_mul(tu->lclk_fp, temp1_fp); + } +} + +static void _tu_valid_boundary_calc(struct tu_algo_data *tu) +{ + s64 temp1_fp, temp2_fp, temp, temp1, temp2; + int compare_result_1, compare_result_2, compare_result_3; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + + tu->new_valid_boundary_link = drm_fixp2int_ceil(temp2_fp); + + temp = (tu->i_upper_boundary_count * + tu->new_valid_boundary_link + + tu->i_lower_boundary_count * + (tu->new_valid_boundary_link-1)); + tu->average_valid2_fp = drm_fixp_from_fraction(temp, + (tu->i_upper_boundary_count + + tu->i_lower_boundary_count)); + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = tu->lwidth_fp; + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + temp2_fp = drm_fixp_div(temp1_fp, tu->average_valid2_fp); + tu->n_tus = drm_fixp2int(temp2_fp); + if ((temp2_fp & 0xFFFFFFFF) > 0xFFFFF000) + tu->n_tus += 1; + + temp1_fp = drm_fixp_from_fraction(tu->n_tus, 1); + temp2_fp = drm_fixp_mul(temp1_fp, tu->average_valid2_fp); + temp1_fp = drm_fixp_from_fraction(tu->n_symbols, 1); + temp2_fp = temp1_fp - temp2_fp; + temp1_fp = drm_fixp_from_fraction(tu->nlanes, 1); + temp2_fp = drm_fixp_div(temp2_fp, temp1_fp); + tu->n_remainder_symbols_per_lane_fp = temp2_fp; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + tu->last_partial_tu_fp = + drm_fixp_div(tu->n_remainder_symbols_per_lane_fp, + temp1_fp); + + if (tu->n_remainder_symbols_per_lane_fp != 0) + tu->remainder_symbols_exist = 1; + else + tu->remainder_symbols_exist = 0; + + temp1_fp = drm_fixp_from_fraction(tu->n_tus, tu->nlanes); + tu->n_tus_per_lane = drm_fixp2int(temp1_fp); + + tu->paired_tus = (int)((tu->n_tus_per_lane) / + (tu->i_upper_boundary_count + + tu->i_lower_boundary_count)); + + tu->remainder_tus = tu->n_tus_per_lane - tu->paired_tus * + (tu->i_upper_boundary_count + + tu->i_lower_boundary_count); + + if ((tu->remainder_tus - tu->i_upper_boundary_count) > 0) { + tu->remainder_tus_upper = tu->i_upper_boundary_count; + tu->remainder_tus_lower = tu->remainder_tus - + tu->i_upper_boundary_count; + } else { + tu->remainder_tus_upper = tu->remainder_tus; + tu->remainder_tus_lower = 0; + } + + temp = tu->paired_tus * (tu->i_upper_boundary_count * + tu->new_valid_boundary_link + + tu->i_lower_boundary_count * + (tu->new_valid_boundary_link - 1)) + + (tu->remainder_tus_upper * + tu->new_valid_boundary_link) + + (tu->remainder_tus_lower * + (tu->new_valid_boundary_link - 1)); + tu->total_valid_fp = drm_fixp_from_fraction(temp, 1); + + if (tu->remainder_symbols_exist) { + temp1_fp = tu->total_valid_fp + + tu->n_remainder_symbols_per_lane_fp; + temp2_fp = drm_fixp_from_fraction(tu->n_tus_per_lane, 1); + temp2_fp = temp2_fp + tu->last_partial_tu_fp; + temp1_fp = drm_fixp_div(temp1_fp, temp2_fp); + } else { + temp2_fp = drm_fixp_from_fraction(tu->n_tus_per_lane, 1); + temp1_fp = drm_fixp_div(tu->total_valid_fp, temp2_fp); + } + tu->effective_valid_fp = temp1_fp; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + tu->n_n_err_fp = tu->effective_valid_fp - temp2_fp; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + tu->n_err_fp = tu->average_valid2_fp - temp2_fp; + + tu->even_distribution = tu->n_tus % tu->nlanes == 0 ? 1 : 0; + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = tu->lwidth_fp; + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + temp2_fp = drm_fixp_div(temp1_fp, tu->average_valid2_fp); + + if (temp2_fp) + tu->n_tus_incl_last_incomplete_tu = drm_fixp2int_ceil(temp2_fp); + else + tu->n_tus_incl_last_incomplete_tu = 0; + + temp1 = 0; + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + temp1_fp = tu->average_valid2_fp - temp2_fp; + temp2_fp = drm_fixp_from_fraction(tu->n_tus_incl_last_incomplete_tu, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + temp1 = drm_fixp2int_ceil(temp1_fp); + + temp = tu->i_upper_boundary_count * tu->nlanes; + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu->new_valid_boundary_link, 1); + temp2_fp = temp1_fp - temp2_fp; + temp1_fp = drm_fixp_from_fraction(temp, 1); + temp2_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + if (temp2_fp) + temp2 = drm_fixp2int_ceil(temp2_fp); + else + temp2 = 0; + tu->extra_required_bytes_new_tmp = (int)(temp1 + temp2); + + temp1_fp = drm_fixp_from_fraction(8, tu->bpp); + temp2_fp = drm_fixp_from_fraction( + tu->extra_required_bytes_new_tmp, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + tu->extra_pclk_cycles_tmp = drm_fixp2int_ceil(temp1_fp); + else + tu->extra_pclk_cycles_tmp = 0; + + temp1_fp = drm_fixp_from_fraction(tu->extra_pclk_cycles_tmp, 1); + temp2_fp = drm_fixp_div(tu->lclk_fp, tu->pclk_fp); + temp1_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + if (temp1_fp) + tu->extra_pclk_cycles_in_link_clk_tmp = + drm_fixp2int_ceil(temp1_fp); + else + tu->extra_pclk_cycles_in_link_clk_tmp = 0; + + tu->filler_size_tmp = tu->tu_size - tu->new_valid_boundary_link; + + tu->lower_filler_size_tmp = tu->filler_size_tmp + 1; + + tu->delay_start_link_tmp = tu->extra_pclk_cycles_in_link_clk_tmp + + tu->lower_filler_size_tmp + + tu->extra_buffer_margin; + + temp1_fp = drm_fixp_from_fraction(tu->delay_start_link_tmp, 1); + tu->delay_start_time_fp = drm_fixp_div(temp1_fp, tu->lclk_fp); + + compare_result_1 = _tu_param_compare(tu->n_n_err_fp, tu->diff_abs_fp); + if (compare_result_1 == 2) + compare_result_1 = 1; + else + compare_result_1 = 0; + + compare_result_2 = _tu_param_compare(tu->n_n_err_fp, tu->err_fp); + if (compare_result_2 == 2) + compare_result_2 = 1; + else + compare_result_2 = 0; + + compare_result_3 = _tu_param_compare(tu->hbp_time_fp, + tu->delay_start_time_fp); + if (compare_result_3 == 2) + compare_result_3 = 0; + else + compare_result_3 = 1; + + if (((tu->even_distribution == 1) || + ((tu->even_distribution_BF == 0) && + (tu->even_distribution_legacy == 0))) && + tu->n_err_fp >= 0 && tu->n_n_err_fp >= 0 && + compare_result_2 && + (compare_result_1 || (tu->min_hblank_violated == 1)) && + (tu->new_valid_boundary_link - 1) > 0 && + compare_result_3 && + (tu->delay_start_link_tmp <= 1023)) { + tu->upper_boundary_count = tu->i_upper_boundary_count; + tu->lower_boundary_count = tu->i_lower_boundary_count; + tu->err_fp = tu->n_n_err_fp; + tu->boundary_moderation_en = true; + tu->tu_size_desired = tu->tu_size; + tu->valid_boundary_link = tu->new_valid_boundary_link; + tu->effective_valid_recorded_fp = tu->effective_valid_fp; + tu->even_distribution_BF = 1; + tu->delay_start_link = tu->delay_start_link_tmp; + } else if (tu->boundary_mod_lower_err == 0) { + compare_result_1 = _tu_param_compare(tu->n_n_err_fp, + tu->diff_abs_fp); + if (compare_result_1 == 2) + tu->boundary_mod_lower_err = 1; + } +} + +static void _dp_ctrl_calc_tu(struct msm_dp_ctrl_private *ctrl, + struct msm_dp_tu_calc_input *in, + struct msm_dp_vc_tu_mapping_table *tu_table) +{ + struct tu_algo_data *tu; + int compare_result_1, compare_result_2; + u64 temp = 0; + s64 temp_fp = 0, temp1_fp = 0, temp2_fp = 0; + + s64 LCLK_FAST_SKEW_fp = drm_fixp_from_fraction(6, 10000); /* 0.0006 */ + s64 const_p49_fp = drm_fixp_from_fraction(49, 100); /* 0.49 */ + s64 const_p56_fp = drm_fixp_from_fraction(56, 100); /* 0.56 */ + s64 RATIO_SCALE_fp = drm_fixp_from_fraction(1001, 1000); + + u8 DP_BRUTE_FORCE = 1; + s64 BRUTE_FORCE_THRESHOLD_fp = drm_fixp_from_fraction(1, 10); /* 0.1 */ + uint EXTRA_PIXCLK_CYCLE_DELAY = 4; + uint HBLANK_MARGIN = 4; + + tu = kzalloc(sizeof(*tu), GFP_KERNEL); + if (!tu) + return; + + msm_dp_panel_update_tu_timings(in, tu); + + tu->err_fp = drm_fixp_from_fraction(1000, 1); /* 1000 */ + + temp1_fp = drm_fixp_from_fraction(4, 1); + temp2_fp = drm_fixp_mul(temp1_fp, tu->lclk_fp); + temp_fp = drm_fixp_div(temp2_fp, tu->pclk_fp); + tu->extra_buffer_margin = drm_fixp2int_ceil(temp_fp); + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = drm_fixp_mul(tu->pclk_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu->nlanes, 1); + temp2_fp = drm_fixp_div(temp2_fp, temp1_fp); + tu->ratio_fp = drm_fixp_div(temp2_fp, tu->lclk_fp); + + tu->original_ratio_fp = tu->ratio_fp; + tu->boundary_moderation_en = false; + tu->upper_boundary_count = 0; + tu->lower_boundary_count = 0; + tu->i_upper_boundary_count = 0; + tu->i_lower_boundary_count = 0; + tu->valid_lower_boundary_link = 0; + tu->even_distribution_BF = 0; + tu->even_distribution_legacy = 0; + tu->even_distribution = 0; + tu->delay_start_time_fp = 0; + + tu->err_fp = drm_fixp_from_fraction(1000, 1); + tu->n_err_fp = 0; + tu->n_n_err_fp = 0; + + tu->ratio = drm_fixp2int(tu->ratio_fp); + temp1_fp = drm_fixp_from_fraction(tu->nlanes, 1); + div64_u64_rem(tu->lwidth_fp, temp1_fp, &temp2_fp); + if (temp2_fp != 0 && + !tu->ratio && tu->dsc_en == 0) { + tu->ratio_fp = drm_fixp_mul(tu->ratio_fp, RATIO_SCALE_fp); + tu->ratio = drm_fixp2int(tu->ratio_fp); + if (tu->ratio) + tu->ratio_fp = drm_fixp_from_fraction(1, 1); + } + + if (tu->ratio > 1) + tu->ratio = 1; + + if (tu->ratio == 1) + goto tu_size_calc; + + compare_result_1 = _tu_param_compare(tu->ratio_fp, const_p49_fp); + if (!compare_result_1 || compare_result_1 == 1) + compare_result_1 = 1; + else + compare_result_1 = 0; + + compare_result_2 = _tu_param_compare(tu->ratio_fp, const_p56_fp); + if (!compare_result_2 || compare_result_2 == 2) + compare_result_2 = 1; + else + compare_result_2 = 0; + + if (tu->dsc_en && compare_result_1 && compare_result_2) { + HBLANK_MARGIN += 4; + drm_dbg_dp(ctrl->drm_dev, + "increase HBLANK_MARGIN to %d\n", HBLANK_MARGIN); + } + +tu_size_calc: + for (tu->tu_size = 32; tu->tu_size <= 64; tu->tu_size++) { + temp1_fp = drm_fixp_from_fraction(tu->tu_size, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + temp = drm_fixp2int_ceil(temp2_fp); + temp1_fp = drm_fixp_from_fraction(temp, 1); + tu->n_err_fp = temp1_fp - temp2_fp; + + if (tu->n_err_fp < tu->err_fp) { + tu->err_fp = tu->n_err_fp; + tu->tu_size_desired = tu->tu_size; + } + } + + tu->tu_size_minus1 = tu->tu_size_desired - 1; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size_desired, 1); + temp2_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + tu->valid_boundary_link = drm_fixp2int_ceil(temp2_fp); + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = tu->lwidth_fp; + temp2_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + temp1_fp = drm_fixp_from_fraction(tu->valid_boundary_link, 1); + temp2_fp = drm_fixp_div(temp2_fp, temp1_fp); + tu->n_tus = drm_fixp2int(temp2_fp); + if ((temp2_fp & 0xFFFFFFFF) > 0xFFFFF000) + tu->n_tus += 1; + + tu->even_distribution_legacy = tu->n_tus % tu->nlanes == 0 ? 1 : 0; + + drm_dbg_dp(ctrl->drm_dev, + "n_sym = %d, num_of_tus = %d\n", + tu->valid_boundary_link, tu->n_tus); + + temp1_fp = drm_fixp_from_fraction(tu->tu_size_desired, 1); + temp2_fp = drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu->valid_boundary_link, 1); + temp2_fp = temp1_fp - temp2_fp; + temp1_fp = drm_fixp_from_fraction(tu->n_tus + 1, 1); + temp2_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + temp = drm_fixp2int(temp2_fp); + if (temp && temp2_fp) + tu->extra_bytes = drm_fixp2int_ceil(temp2_fp); + else + tu->extra_bytes = 0; + + temp1_fp = drm_fixp_from_fraction(tu->extra_bytes, 1); + temp2_fp = drm_fixp_from_fraction(8, tu->bpp); + temp1_fp = drm_fixp_mul(temp1_fp, temp2_fp); + + if (temp && temp1_fp) + tu->extra_pclk_cycles = drm_fixp2int_ceil(temp1_fp); + else + tu->extra_pclk_cycles = drm_fixp2int(temp1_fp); + + temp1_fp = drm_fixp_div(tu->lclk_fp, tu->pclk_fp); + temp2_fp = drm_fixp_from_fraction(tu->extra_pclk_cycles, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + tu->extra_pclk_cycles_in_link_clk = drm_fixp2int_ceil(temp1_fp); + else + tu->extra_pclk_cycles_in_link_clk = drm_fixp2int(temp1_fp); + + tu->filler_size = tu->tu_size_desired - tu->valid_boundary_link; + + temp1_fp = drm_fixp_from_fraction(tu->tu_size_desired, 1); + tu->ratio_by_tu_fp = drm_fixp_mul(tu->ratio_fp, temp1_fp); + + tu->delay_start_link = tu->extra_pclk_cycles_in_link_clk + + tu->filler_size + tu->extra_buffer_margin; + + tu->resulting_valid_fp = + drm_fixp_from_fraction(tu->valid_boundary_link, 1); + + temp1_fp = drm_fixp_from_fraction(tu->tu_size_desired, 1); + temp2_fp = drm_fixp_div(tu->resulting_valid_fp, temp1_fp); + tu->TU_ratio_err_fp = temp2_fp - tu->original_ratio_fp; + + temp1_fp = drm_fixp_from_fraction(HBLANK_MARGIN, 1); + temp1_fp = tu->hbp_relative_to_pclk_fp - temp1_fp; + tu->hbp_time_fp = drm_fixp_div(temp1_fp, tu->pclk_fp); + + temp1_fp = drm_fixp_from_fraction(tu->delay_start_link, 1); + tu->delay_start_time_fp = drm_fixp_div(temp1_fp, tu->lclk_fp); + + compare_result_1 = _tu_param_compare(tu->hbp_time_fp, + tu->delay_start_time_fp); + if (compare_result_1 == 2) /* if (hbp_time_fp < delay_start_time_fp) */ + tu->min_hblank_violated = 1; + + tu->hactive_time_fp = drm_fixp_div(tu->lwidth_fp, tu->pclk_fp); + + compare_result_2 = _tu_param_compare(tu->hactive_time_fp, + tu->delay_start_time_fp); + if (compare_result_2 == 2) + tu->min_hblank_violated = 1; + + tu->delay_start_time_fp = 0; + + /* brute force */ + + tu->delay_start_link_extra_pixclk = EXTRA_PIXCLK_CYCLE_DELAY; + tu->diff_abs_fp = tu->resulting_valid_fp - tu->ratio_by_tu_fp; + + temp = drm_fixp2int(tu->diff_abs_fp); + if (!temp && tu->diff_abs_fp <= 0xffff) + tu->diff_abs_fp = 0; + + /* if(diff_abs < 0) diff_abs *= -1 */ + if (tu->diff_abs_fp < 0) + tu->diff_abs_fp = drm_fixp_mul(tu->diff_abs_fp, -1); + + tu->boundary_mod_lower_err = 0; + if ((tu->diff_abs_fp != 0 && + ((tu->diff_abs_fp > BRUTE_FORCE_THRESHOLD_fp) || + (tu->even_distribution_legacy == 0) || + (DP_BRUTE_FORCE == 1))) || + (tu->min_hblank_violated == 1)) { + do { + tu->err_fp = drm_fixp_from_fraction(1000, 1); + + temp1_fp = drm_fixp_div(tu->lclk_fp, tu->pclk_fp); + temp2_fp = drm_fixp_from_fraction( + tu->delay_start_link_extra_pixclk, 1); + temp1_fp = drm_fixp_mul(temp2_fp, temp1_fp); + + if (temp1_fp) + tu->extra_buffer_margin = + drm_fixp2int_ceil(temp1_fp); + else + tu->extra_buffer_margin = 0; + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp1_fp = drm_fixp_mul(tu->lwidth_fp, temp1_fp); + + if (temp1_fp) + tu->n_symbols = drm_fixp2int_ceil(temp1_fp); + else + tu->n_symbols = 0; + + for (tu->tu_size = 32; tu->tu_size <= 64; tu->tu_size++) { + for (tu->i_upper_boundary_count = 1; + tu->i_upper_boundary_count <= 15; + tu->i_upper_boundary_count++) { + for (tu->i_lower_boundary_count = 1; + tu->i_lower_boundary_count <= 15; + tu->i_lower_boundary_count++) { + _tu_valid_boundary_calc(tu); + } + } + } + tu->delay_start_link_extra_pixclk--; + } while (tu->boundary_moderation_en != true && + tu->boundary_mod_lower_err == 1 && + tu->delay_start_link_extra_pixclk != 0); + + if (tu->boundary_moderation_en == true) { + temp1_fp = drm_fixp_from_fraction( + (tu->upper_boundary_count * + tu->valid_boundary_link + + tu->lower_boundary_count * + (tu->valid_boundary_link - 1)), 1); + temp2_fp = drm_fixp_from_fraction( + (tu->upper_boundary_count + + tu->lower_boundary_count), 1); + tu->resulting_valid_fp = + drm_fixp_div(temp1_fp, temp2_fp); + + temp1_fp = drm_fixp_from_fraction( + tu->tu_size_desired, 1); + tu->ratio_by_tu_fp = + drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + + tu->valid_lower_boundary_link = + tu->valid_boundary_link - 1; + + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp1_fp = drm_fixp_mul(tu->lwidth_fp, temp1_fp); + temp2_fp = drm_fixp_div(temp1_fp, + tu->resulting_valid_fp); + tu->n_tus = drm_fixp2int(temp2_fp); + + tu->tu_size_minus1 = tu->tu_size_desired - 1; + tu->even_distribution_BF = 1; + + temp1_fp = + drm_fixp_from_fraction(tu->tu_size_desired, 1); + temp2_fp = + drm_fixp_div(tu->resulting_valid_fp, temp1_fp); + tu->TU_ratio_err_fp = temp2_fp - tu->original_ratio_fp; + } + } + + temp2_fp = drm_fixp_mul(LCLK_FAST_SKEW_fp, tu->lwidth_fp); + + if (temp2_fp) + temp = drm_fixp2int_ceil(temp2_fp); + else + temp = 0; + + temp1_fp = drm_fixp_from_fraction(tu->nlanes, 1); + temp2_fp = drm_fixp_mul(tu->original_ratio_fp, temp1_fp); + temp1_fp = drm_fixp_from_fraction(tu->bpp, 8); + temp2_fp = drm_fixp_div(temp1_fp, temp2_fp); + temp1_fp = drm_fixp_from_fraction(temp, 1); + temp2_fp = drm_fixp_mul(temp1_fp, temp2_fp); + temp = drm_fixp2int(temp2_fp); + + if (tu->async_en) + tu->delay_start_link += (int)temp; + + temp1_fp = drm_fixp_from_fraction(tu->delay_start_link, 1); + tu->delay_start_time_fp = drm_fixp_div(temp1_fp, tu->lclk_fp); + + /* OUTPUTS */ + tu_table->valid_boundary_link = tu->valid_boundary_link; + tu_table->delay_start_link = tu->delay_start_link; + tu_table->boundary_moderation_en = tu->boundary_moderation_en; + tu_table->valid_lower_boundary_link = tu->valid_lower_boundary_link; + tu_table->upper_boundary_count = tu->upper_boundary_count; + tu_table->lower_boundary_count = tu->lower_boundary_count; + tu_table->tu_size_minus1 = tu->tu_size_minus1; + + drm_dbg_dp(ctrl->drm_dev, "TU: valid_boundary_link: %d\n", + tu_table->valid_boundary_link); + drm_dbg_dp(ctrl->drm_dev, "TU: delay_start_link: %d\n", + tu_table->delay_start_link); + drm_dbg_dp(ctrl->drm_dev, "TU: boundary_moderation_en: %d\n", + tu_table->boundary_moderation_en); + drm_dbg_dp(ctrl->drm_dev, "TU: valid_lower_boundary_link: %d\n", + tu_table->valid_lower_boundary_link); + drm_dbg_dp(ctrl->drm_dev, "TU: upper_boundary_count: %d\n", + tu_table->upper_boundary_count); + drm_dbg_dp(ctrl->drm_dev, "TU: lower_boundary_count: %d\n", + tu_table->lower_boundary_count); + drm_dbg_dp(ctrl->drm_dev, "TU: tu_size_minus1: %d\n", + tu_table->tu_size_minus1); + + kfree(tu); +} + +static void msm_dp_ctrl_calc_tu_parameters(struct msm_dp_ctrl_private *ctrl, + struct msm_dp_vc_tu_mapping_table *tu_table) +{ + struct msm_dp_tu_calc_input in; + struct drm_display_mode *drm_mode; + + drm_mode = &ctrl->panel->msm_dp_mode.drm_mode; + + in.lclk = ctrl->link->link_params.rate / 1000; + in.pclk_khz = drm_mode->clock; + in.hactive = drm_mode->hdisplay; + in.hporch = drm_mode->htotal - drm_mode->hdisplay; + in.nlanes = ctrl->link->link_params.num_lanes; + in.bpp = ctrl->panel->msm_dp_mode.bpp; + in.pixel_enc = ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420 ? 420 : 444; + in.dsc_en = 0; + in.async_en = 0; + in.fec_en = 0; + in.num_of_dsc_slices = 0; + in.compress_ratio = 100; + + _dp_ctrl_calc_tu(ctrl, &in, tu_table); +} + +static void msm_dp_ctrl_setup_tr_unit(struct msm_dp_ctrl_private *ctrl) +{ + u32 msm_dp_tu = 0x0; + u32 valid_boundary = 0x0; + u32 valid_boundary2 = 0x0; + struct msm_dp_vc_tu_mapping_table tu_calc_table; + + msm_dp_ctrl_calc_tu_parameters(ctrl, &tu_calc_table); + + msm_dp_tu |= tu_calc_table.tu_size_minus1; + valid_boundary |= tu_calc_table.valid_boundary_link; + valid_boundary |= (tu_calc_table.delay_start_link << 16); + + valid_boundary2 |= (tu_calc_table.valid_lower_boundary_link << 1); + valid_boundary2 |= (tu_calc_table.upper_boundary_count << 16); + valid_boundary2 |= (tu_calc_table.lower_boundary_count << 20); + + if (tu_calc_table.boundary_moderation_en) + valid_boundary2 |= BIT(0); + + pr_debug("dp_tu=0x%x, valid_boundary=0x%x, valid_boundary2=0x%x\n", + msm_dp_tu, valid_boundary, valid_boundary2); + + msm_dp_write_link(ctrl, REG_DP_VALID_BOUNDARY, valid_boundary); + msm_dp_write_link(ctrl, REG_DP_TU, msm_dp_tu); + msm_dp_write_link(ctrl, REG_DP_VALID_BOUNDARY_2, valid_boundary2); +} + +static int msm_dp_ctrl_wait4video_ready(struct msm_dp_ctrl_private *ctrl) +{ + int ret = 0; + + if (!wait_for_completion_timeout(&ctrl->video_comp, + WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES)) { + DRM_ERROR("wait4video timedout\n"); + ret = -ETIMEDOUT; + } + return ret; +} + +static int msm_dp_ctrl_set_vx_px(struct msm_dp_ctrl_private *ctrl, + u8 v_level, u8 p_level) +{ + union phy_configure_opts *phy_opts = &ctrl->phy_opts; + + /* TODO: Update for all lanes instead of just first one */ + phy_opts->dp.voltage[0] = v_level; + phy_opts->dp.pre[0] = p_level; + phy_opts->dp.set_voltages = 1; + phy_configure(ctrl->phy, phy_opts); + phy_opts->dp.set_voltages = 0; + + return 0; +} + +static int msm_dp_ctrl_update_phy_vx_px(struct msm_dp_ctrl_private *ctrl, + enum drm_dp_phy dp_phy) +{ + struct msm_dp_link *link = ctrl->link; + int lane, lane_cnt, reg; + int ret = 0; + u8 buf[4]; + u32 max_level_reached = 0; + u32 voltage_swing_level = link->phy_params.v_level; + u32 pre_emphasis_level = link->phy_params.p_level; + + drm_dbg_dp(ctrl->drm_dev, + "voltage level: %d emphasis level: %d\n", + voltage_swing_level, pre_emphasis_level); + ret = msm_dp_ctrl_set_vx_px(ctrl, + voltage_swing_level, pre_emphasis_level); + + if (ret) + return ret; + + if (voltage_swing_level >= DP_TRAIN_LEVEL_MAX) { + drm_dbg_dp(ctrl->drm_dev, + "max. voltage swing level reached %d\n", + voltage_swing_level); + max_level_reached |= DP_TRAIN_MAX_SWING_REACHED; + } + + if (pre_emphasis_level >= DP_TRAIN_LEVEL_MAX) { + drm_dbg_dp(ctrl->drm_dev, + "max. pre-emphasis level reached %d\n", + pre_emphasis_level); + max_level_reached |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; + } + + pre_emphasis_level <<= DP_TRAIN_PRE_EMPHASIS_SHIFT; + + lane_cnt = ctrl->link->link_params.num_lanes; + for (lane = 0; lane < lane_cnt; lane++) + buf[lane] = voltage_swing_level | pre_emphasis_level + | max_level_reached; + + drm_dbg_dp(ctrl->drm_dev, "sink: p|v=0x%x\n", + voltage_swing_level | pre_emphasis_level); + + if (dp_phy == DP_PHY_DPRX) + reg = DP_TRAINING_LANE0_SET; + else + reg = DP_TRAINING_LANE0_SET_PHY_REPEATER(dp_phy); + + ret = drm_dp_dpcd_write(ctrl->aux, reg, buf, lane_cnt); + if (ret == lane_cnt) + ret = 0; + + return ret; +} + +static bool msm_dp_ctrl_train_pattern_set(struct msm_dp_ctrl_private *ctrl, + u8 pattern, enum drm_dp_phy dp_phy) +{ + u8 buf; + int reg; + int ret = 0; + + drm_dbg_dp(ctrl->drm_dev, "sink: pattern=%x\n", pattern); + + buf = pattern; + + if (pattern && pattern != DP_TRAINING_PATTERN_4) + buf |= DP_LINK_SCRAMBLING_DISABLE; + + if (dp_phy == DP_PHY_DPRX) + reg = DP_TRAINING_PATTERN_SET; + else + reg = DP_TRAINING_PATTERN_SET_PHY_REPEATER(dp_phy); + + ret = drm_dp_dpcd_writeb(ctrl->aux, reg, buf); + return ret == 1; +} + +static int msm_dp_ctrl_set_pattern_state_bit(struct msm_dp_ctrl_private *ctrl, + u32 state_bit) +{ + int bit, ret; + u32 data; + + bit = BIT(state_bit - 1); + drm_dbg_dp(ctrl->drm_dev, "hw: bit=%d train=%d\n", bit, state_bit); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, bit); + + bit = BIT(state_bit - 1) << DP_MAINLINK_READY_LINK_TRAINING_SHIFT; + + /* Poll for mainlink ready status */ + ret = readx_poll_timeout(readl, ctrl->link_base + REG_DP_MAINLINK_READY, + data, data & bit, + POLLING_SLEEP_US, POLLING_TIMEOUT_US); + if (ret < 0) { + DRM_ERROR("set state_bit for link_train=%d failed\n", state_bit); + return ret; + } + + return 0; +} + +static int msm_dp_ctrl_link_train_1(struct msm_dp_ctrl_private *ctrl, + int *training_step, enum drm_dp_phy dp_phy) +{ + int delay_us; + int tries, old_v_level, ret = 0; + u8 link_status[DP_LINK_STATUS_SIZE]; + int const maximum_retries = 4; + + delay_us = drm_dp_read_clock_recovery_delay(ctrl->aux, + ctrl->panel->dpcd, dp_phy, false); + + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, 0); + + *training_step = DP_TRAINING_1; + + ret = msm_dp_ctrl_set_pattern_state_bit(ctrl, 1); + if (ret) + return ret; + msm_dp_ctrl_train_pattern_set(ctrl, DP_TRAINING_PATTERN_1 | + DP_LINK_SCRAMBLING_DISABLE, dp_phy); + + msm_dp_link_reset_phy_params_vx_px(ctrl->link); + ret = msm_dp_ctrl_update_phy_vx_px(ctrl, dp_phy); + if (ret) + return ret; + + tries = 0; + old_v_level = ctrl->link->phy_params.v_level; + for (tries = 0; tries < maximum_retries; tries++) { + fsleep(delay_us); + + ret = drm_dp_dpcd_read_phy_link_status(ctrl->aux, dp_phy, link_status); + if (ret) + return ret; + + if (drm_dp_clock_recovery_ok(link_status, + ctrl->link->link_params.num_lanes)) { + return 0; + } + + if (ctrl->link->phy_params.v_level >= + DP_TRAIN_LEVEL_MAX) { + DRM_ERROR_RATELIMITED("max v_level reached\n"); + return -EAGAIN; + } + + if (old_v_level != ctrl->link->phy_params.v_level) { + tries = 0; + old_v_level = ctrl->link->phy_params.v_level; + } + + msm_dp_link_adjust_levels(ctrl->link, link_status); + ret = msm_dp_ctrl_update_phy_vx_px(ctrl, dp_phy); + if (ret) + return ret; + } + + DRM_ERROR("max tries reached\n"); + return -ETIMEDOUT; +} + +static int msm_dp_ctrl_link_rate_down_shift(struct msm_dp_ctrl_private *ctrl) +{ + int ret = 0; + + switch (ctrl->link->link_params.rate) { + case 810000: + ctrl->link->link_params.rate = 540000; + break; + case 540000: + ctrl->link->link_params.rate = 270000; + break; + case 270000: + ctrl->link->link_params.rate = 162000; + break; + case 162000: + default: + ret = -EINVAL; + break; + } + + if (!ret) { + drm_dbg_dp(ctrl->drm_dev, "new rate=0x%x\n", + ctrl->link->link_params.rate); + } + + return ret; +} + +static int msm_dp_ctrl_link_lane_down_shift(struct msm_dp_ctrl_private *ctrl) +{ + + if (ctrl->link->link_params.num_lanes == 1) + return -1; + + ctrl->link->link_params.num_lanes /= 2; + ctrl->link->link_params.rate = ctrl->panel->link_info.rate; + + ctrl->link->phy_params.p_level = 0; + ctrl->link->phy_params.v_level = 0; + + return 0; +} + +static void msm_dp_ctrl_clear_training_pattern(struct msm_dp_ctrl_private *ctrl, + enum drm_dp_phy dp_phy) +{ + int delay_us; + + msm_dp_ctrl_train_pattern_set(ctrl, DP_TRAINING_PATTERN_DISABLE, dp_phy); + + delay_us = drm_dp_read_channel_eq_delay(ctrl->aux, + ctrl->panel->dpcd, dp_phy, false); + fsleep(delay_us); +} + +static int msm_dp_ctrl_link_train_2(struct msm_dp_ctrl_private *ctrl, + int *training_step, enum drm_dp_phy dp_phy) +{ + int delay_us; + int tries = 0, ret = 0; + u8 pattern; + u32 state_ctrl_bit; + int const maximum_retries = 5; + u8 link_status[DP_LINK_STATUS_SIZE]; + + delay_us = drm_dp_read_channel_eq_delay(ctrl->aux, + ctrl->panel->dpcd, dp_phy, false); + + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, 0); + + *training_step = DP_TRAINING_2; + + if (drm_dp_tps4_supported(ctrl->panel->dpcd)) { + pattern = DP_TRAINING_PATTERN_4; + state_ctrl_bit = 4; + } else if (drm_dp_tps3_supported(ctrl->panel->dpcd)) { + pattern = DP_TRAINING_PATTERN_3; + state_ctrl_bit = 3; + } else { + pattern = DP_TRAINING_PATTERN_2; + state_ctrl_bit = 2; + } + + ret = msm_dp_ctrl_set_pattern_state_bit(ctrl, state_ctrl_bit); + if (ret) + return ret; + + msm_dp_ctrl_train_pattern_set(ctrl, pattern, dp_phy); + + for (tries = 0; tries <= maximum_retries; tries++) { + fsleep(delay_us); + + ret = drm_dp_dpcd_read_phy_link_status(ctrl->aux, dp_phy, link_status); + if (ret) + return ret; + + if (drm_dp_channel_eq_ok(link_status, + ctrl->link->link_params.num_lanes)) { + return 0; + } + + msm_dp_link_adjust_levels(ctrl->link, link_status); + ret = msm_dp_ctrl_update_phy_vx_px(ctrl, dp_phy); + if (ret) + return ret; + + } + + return -ETIMEDOUT; +} + +static int msm_dp_ctrl_link_train_1_2(struct msm_dp_ctrl_private *ctrl, + int *training_step, enum drm_dp_phy dp_phy) +{ + int ret; + + ret = msm_dp_ctrl_link_train_1(ctrl, training_step, dp_phy); + if (ret) { + DRM_ERROR("link training #1 on phy %d failed. ret=%d\n", dp_phy, ret); + return ret; + } + drm_dbg_dp(ctrl->drm_dev, "link training #1 on phy %d successful\n", dp_phy); + + ret = msm_dp_ctrl_link_train_2(ctrl, training_step, dp_phy); + if (ret) { + DRM_ERROR("link training #2 on phy %d failed. ret=%d\n", dp_phy, ret); + return ret; + } + drm_dbg_dp(ctrl->drm_dev, "link training #2 on phy %d successful\n", dp_phy); + + return 0; +} + +static int msm_dp_ctrl_link_train(struct msm_dp_ctrl_private *ctrl, + int *training_step) +{ + int i; + int ret = 0; + const u8 *dpcd = ctrl->panel->dpcd; + u8 encoding[] = { 0, DP_SET_ANSI_8B10B }; + u8 assr; + struct msm_dp_link_info link_info = {0}; + + msm_dp_ctrl_config_ctrl(ctrl); + + link_info.num_lanes = ctrl->link->link_params.num_lanes; + link_info.rate = ctrl->link->link_params.rate; + link_info.capabilities = DP_LINK_CAP_ENHANCED_FRAMING; + + msm_dp_aux_link_configure(ctrl->aux, &link_info); + + if (drm_dp_max_downspread(dpcd)) + encoding[0] |= DP_SPREAD_AMP_0_5; + + /* config DOWNSPREAD_CTRL and MAIN_LINK_CHANNEL_CODING_SET */ + drm_dp_dpcd_write(ctrl->aux, DP_DOWNSPREAD_CTRL, encoding, 2); + + if (drm_dp_alternate_scrambler_reset_cap(dpcd)) { + assr = DP_ALTERNATE_SCRAMBLER_RESET_ENABLE; + drm_dp_dpcd_write(ctrl->aux, DP_EDP_CONFIGURATION_SET, + &assr, 1); + } + + for (i = ctrl->link->lttpr_count - 1; i >= 0; i--) { + enum drm_dp_phy dp_phy = DP_PHY_LTTPR(i); + + ret = msm_dp_ctrl_link_train_1_2(ctrl, training_step, dp_phy); + msm_dp_ctrl_clear_training_pattern(ctrl, dp_phy); + + if (ret) + break; + } + + if (ret) { + DRM_ERROR("link training of LTTPR(s) failed. ret=%d\n", ret); + goto end; + } + + ret = msm_dp_ctrl_link_train_1_2(ctrl, training_step, DP_PHY_DPRX); + if (ret) { + DRM_ERROR("link training on sink failed. ret=%d\n", ret); + goto end; + } + +end: + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, 0); + + return ret; +} + +static int msm_dp_ctrl_setup_main_link(struct msm_dp_ctrl_private *ctrl, + int *training_step) +{ + int ret = 0; + + msm_dp_ctrl_mainlink_enable(ctrl); + + if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) + return ret; + + /* + * As part of previous calls, DP controller state might have + * transitioned to PUSH_IDLE. In order to start transmitting + * a link training pattern, we have to first do soft reset. + */ + + ret = msm_dp_ctrl_link_train(ctrl, training_step); + + return ret; +} + +int msm_dp_ctrl_core_clk_enable(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + int ret = 0; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + if (ctrl->core_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "core clks already enabled\n"); + return 0; + } + + ret = clk_bulk_prepare_enable(ctrl->num_core_clks, ctrl->core_clks); + if (ret) + return ret; + + ctrl->core_clks_on = true; + + drm_dbg_dp(ctrl->drm_dev, "enable core clocks \n"); + drm_dbg_dp(ctrl->drm_dev, "stream_clks:%s link_clks:%s core_clks:%s\n", + str_on_off(ctrl->stream_clks_on), + str_on_off(ctrl->link_clks_on), + str_on_off(ctrl->core_clks_on)); + + return 0; +} + +void msm_dp_ctrl_core_clk_disable(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + clk_bulk_disable_unprepare(ctrl->num_core_clks, ctrl->core_clks); + + ctrl->core_clks_on = false; + + drm_dbg_dp(ctrl->drm_dev, "disable core clocks \n"); + drm_dbg_dp(ctrl->drm_dev, "stream_clks:%s link_clks:%s core_clks:%s\n", + str_on_off(ctrl->stream_clks_on), + str_on_off(ctrl->link_clks_on), + str_on_off(ctrl->core_clks_on)); +} + +static int msm_dp_ctrl_link_clk_enable(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + int ret = 0; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + if (ctrl->link_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "links clks already enabled\n"); + return 0; + } + + if (!ctrl->core_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "Enable core clks before link clks\n"); + + msm_dp_ctrl_core_clk_enable(msm_dp_ctrl); + } + + ret = clk_bulk_prepare_enable(ctrl->num_link_clks, ctrl->link_clks); + if (ret) + return ret; + + ctrl->link_clks_on = true; + + drm_dbg_dp(ctrl->drm_dev, "enable link clocks\n"); + drm_dbg_dp(ctrl->drm_dev, "stream_clks:%s link_clks:%s core_clks:%s\n", + str_on_off(ctrl->stream_clks_on), + str_on_off(ctrl->link_clks_on), + str_on_off(ctrl->core_clks_on)); + + return 0; +} + +static void msm_dp_ctrl_link_clk_disable(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + clk_bulk_disable_unprepare(ctrl->num_link_clks, ctrl->link_clks); + + ctrl->link_clks_on = false; + + drm_dbg_dp(ctrl->drm_dev, "disabled link clocks\n"); + drm_dbg_dp(ctrl->drm_dev, "stream_clks:%s link_clks:%s core_clks:%s\n", + str_on_off(ctrl->stream_clks_on), + str_on_off(ctrl->link_clks_on), + str_on_off(ctrl->core_clks_on)); +} + +static int msm_dp_ctrl_enable_mainlink_clocks(struct msm_dp_ctrl_private *ctrl) +{ + int ret = 0; + struct phy *phy = ctrl->phy; + const u8 *dpcd = ctrl->panel->dpcd; + + ctrl->phy_opts.dp.lanes = ctrl->link->link_params.num_lanes; + ctrl->phy_opts.dp.link_rate = ctrl->link->link_params.rate / 100; + ctrl->phy_opts.dp.ssc = drm_dp_max_downspread(dpcd); + + phy_configure(phy, &ctrl->phy_opts); + phy_power_on(phy); + + dev_pm_opp_set_rate(ctrl->dev, ctrl->link->link_params.rate * 1000); + ret = msm_dp_ctrl_link_clk_enable(&ctrl->msm_dp_ctrl); + if (ret) + DRM_ERROR("Unable to start link clocks. ret=%d\n", ret); + + drm_dbg_dp(ctrl->drm_dev, "link rate=%d\n", ctrl->link->link_params.rate); + + return ret; +} + +static void msm_dp_ctrl_enable_sdp(struct msm_dp_ctrl_private *ctrl) +{ + /* trigger sdp */ + msm_dp_write_link(ctrl, MMSS_DP_SDP_CFG3, UPDATE_SDP); + msm_dp_write_link(ctrl, MMSS_DP_SDP_CFG3, 0x0); +} + +static void msm_dp_ctrl_psr_enter(struct msm_dp_ctrl_private *ctrl) +{ + u32 cmd; + + cmd = msm_dp_read_link(ctrl, REG_PSR_CMD); + + cmd &= ~(PSR_ENTER | PSR_EXIT); + cmd |= PSR_ENTER; + + msm_dp_ctrl_enable_sdp(ctrl); + msm_dp_write_link(ctrl, REG_PSR_CMD, cmd); +} + +static void msm_dp_ctrl_psr_exit(struct msm_dp_ctrl_private *ctrl) +{ + u32 cmd; + + cmd = msm_dp_read_link(ctrl, REG_PSR_CMD); + + cmd &= ~(PSR_ENTER | PSR_EXIT); + cmd |= PSR_EXIT; + + msm_dp_ctrl_enable_sdp(ctrl); + msm_dp_write_link(ctrl, REG_PSR_CMD, cmd); +} + +void msm_dp_ctrl_config_psr(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl = container_of(msm_dp_ctrl, + struct msm_dp_ctrl_private, msm_dp_ctrl); + u32 cfg; + + if (!ctrl->panel->psr_cap.version) + return; + + /* enable PSR1 function */ + cfg = msm_dp_read_link(ctrl, REG_PSR_CONFIG); + cfg |= PSR1_SUPPORTED; + msm_dp_write_link(ctrl, REG_PSR_CONFIG, cfg); + + msm_dp_ctrl_config_psr_interrupt(ctrl); + msm_dp_ctrl_enable_sdp(ctrl); + + cfg = DP_PSR_ENABLE; + drm_dp_dpcd_write(ctrl->aux, DP_PSR_EN_CFG, &cfg, 1); +} + +void msm_dp_ctrl_set_psr(struct msm_dp_ctrl *msm_dp_ctrl, bool enter) +{ + struct msm_dp_ctrl_private *ctrl = container_of(msm_dp_ctrl, + struct msm_dp_ctrl_private, msm_dp_ctrl); + + if (!ctrl->panel->psr_cap.version) + return; + + /* + * When entering PSR, + * 1. Send PSR enter SDP and wait for the PSR_UPDATE_INT + * 2. Turn off video + * 3. Disable the mainlink + * + * When exiting PSR, + * 1. Enable the mainlink + * 2. Send the PSR exit SDP + */ + if (enter) { + reinit_completion(&ctrl->psr_op_comp); + msm_dp_ctrl_psr_enter(ctrl); + + if (!wait_for_completion_timeout(&ctrl->psr_op_comp, + PSR_OPERATION_COMPLETION_TIMEOUT_JIFFIES)) { + DRM_ERROR("PSR_ENTRY timedout\n"); + msm_dp_ctrl_psr_exit(ctrl); + return; + } + + msm_dp_ctrl_push_idle(msm_dp_ctrl); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, 0); + + msm_dp_ctrl_psr_mainlink_disable(ctrl); + } else { + msm_dp_ctrl_psr_mainlink_enable(ctrl); + + msm_dp_ctrl_psr_exit(ctrl); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, DP_STATE_CTRL_SEND_VIDEO); + msm_dp_ctrl_wait4video_ready(ctrl); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, 0); + } +} + +static void msm_dp_ctrl_phy_reset(struct msm_dp_ctrl_private *ctrl) +{ + msm_dp_write_ahb(ctrl, REG_DP_PHY_CTRL, + DP_PHY_CTRL_SW_RESET | DP_PHY_CTRL_SW_RESET_PLL); + usleep_range(1000, 1100); /* h/w recommended delay */ + msm_dp_write_ahb(ctrl, REG_DP_PHY_CTRL, 0x0); +} + +void msm_dp_ctrl_phy_init(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct phy *phy; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + phy = ctrl->phy; + + msm_dp_ctrl_phy_reset(ctrl); + phy_init(phy); + + drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); +} + +void msm_dp_ctrl_phy_exit(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct phy *phy; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + phy = ctrl->phy; + + msm_dp_ctrl_phy_reset(ctrl); + phy_exit(phy); + drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); +} + +static int msm_dp_ctrl_reinitialize_mainlink(struct msm_dp_ctrl_private *ctrl) +{ + struct phy *phy = ctrl->phy; + int ret = 0; + + msm_dp_ctrl_mainlink_disable(ctrl); + ctrl->phy_opts.dp.lanes = ctrl->link->link_params.num_lanes; + phy_configure(phy, &ctrl->phy_opts); + /* + * Disable and re-enable the mainlink clock since the + * link clock might have been adjusted as part of the + * link maintenance. + */ + dev_pm_opp_set_rate(ctrl->dev, 0); + + msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl); + + phy_power_off(phy); + /* hw recommended delay before re-enabling clocks */ + msleep(20); + + ret = msm_dp_ctrl_enable_mainlink_clocks(ctrl); + if (ret) { + DRM_ERROR("Failed to enable mainlink clks. ret=%d\n", ret); + return ret; + } + + return ret; +} + +static int msm_dp_ctrl_deinitialize_mainlink(struct msm_dp_ctrl_private *ctrl) +{ + struct phy *phy; + + phy = ctrl->phy; + + msm_dp_ctrl_mainlink_disable(ctrl); + + msm_dp_ctrl_reset(&ctrl->msm_dp_ctrl); + + dev_pm_opp_set_rate(ctrl->dev, 0); + msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl); + + phy_power_off(phy); + + /* aux channel down, reinit phy */ + phy_exit(phy); + phy_init(phy); + + drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); + return 0; +} + +static int msm_dp_ctrl_link_maintenance(struct msm_dp_ctrl_private *ctrl) +{ + int ret = 0; + int training_step = DP_TRAINING_NONE; + + msm_dp_ctrl_push_idle(&ctrl->msm_dp_ctrl); + + ctrl->link->phy_params.p_level = 0; + ctrl->link->phy_params.v_level = 0; + + ret = msm_dp_ctrl_setup_main_link(ctrl, &training_step); + if (ret) + goto end; + + msm_dp_ctrl_clear_training_pattern(ctrl, DP_PHY_DPRX); + + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, DP_STATE_CTRL_SEND_VIDEO); + + ret = msm_dp_ctrl_wait4video_ready(ctrl); +end: + return ret; +} + +#define SCRAMBLER_RESET_COUNT_VALUE 0xFC + +static void msm_dp_ctrl_send_phy_pattern(struct msm_dp_ctrl_private *ctrl, + u32 pattern) +{ + u32 value = 0x0; + + /* Make sure to clear the current pattern before starting a new one */ + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, 0x0); + + drm_dbg_dp(ctrl->drm_dev, "pattern: %#x\n", pattern); + switch (pattern) { + case DP_PHY_TEST_PATTERN_D10_2: + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_TRAINING_PATTERN1); + break; + + case DP_PHY_TEST_PATTERN_ERROR_COUNT: + value &= ~(1 << 16); + msm_dp_write_link(ctrl, REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET, + value); + value |= SCRAMBLER_RESET_COUNT_VALUE; + msm_dp_write_link(ctrl, REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET, + value); + msm_dp_write_link(ctrl, REG_DP_MAINLINK_LEVELS, + DP_MAINLINK_SAFE_TO_EXIT_LEVEL_2); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_SYMBOL_ERR_MEASURE); + break; + + case DP_PHY_TEST_PATTERN_PRBS7: + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_PRBS7); + break; + + case DP_PHY_TEST_PATTERN_80BIT_CUSTOM: + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_TEST_CUSTOM_PATTERN); + /* 00111110000011111000001111100000 */ + msm_dp_write_link(ctrl, REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG0, + 0x3E0F83E0); + /* 00001111100000111110000011111000 */ + msm_dp_write_link(ctrl, REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG1, + 0x0F83E0F8); + /* 1111100000111110 */ + msm_dp_write_link(ctrl, REG_DP_TEST_80BIT_CUSTOM_PATTERN_REG2, + 0x0000F83E); + break; + + case DP_PHY_TEST_PATTERN_CP2520: + value = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + value &= ~DP_MAINLINK_CTRL_SW_BYPASS_SCRAMBLER; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, value); + + value = DP_HBR2_ERM_PATTERN; + msm_dp_write_link(ctrl, REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET, + value); + value |= SCRAMBLER_RESET_COUNT_VALUE; + msm_dp_write_link(ctrl, REG_DP_HBR2_COMPLIANCE_SCRAMBLER_RESET, + value); + msm_dp_write_link(ctrl, REG_DP_MAINLINK_LEVELS, + DP_MAINLINK_SAFE_TO_EXIT_LEVEL_2); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_SYMBOL_ERR_MEASURE); + value = msm_dp_read_link(ctrl, REG_DP_MAINLINK_CTRL); + value |= DP_MAINLINK_CTRL_ENABLE; + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, value); + break; + + case DP_PHY_TEST_PATTERN_SEL_MASK: + msm_dp_write_link(ctrl, REG_DP_MAINLINK_CTRL, + DP_MAINLINK_CTRL_ENABLE); + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, + DP_STATE_CTRL_LINK_TRAINING_PATTERN4); + break; + + default: + drm_dbg_dp(ctrl->drm_dev, + "No valid test pattern requested: %#x\n", pattern); + break; + } +} + +static bool msm_dp_ctrl_send_phy_test_pattern(struct msm_dp_ctrl_private *ctrl) +{ + bool success = false; + u32 pattern_sent = 0x0; + u32 pattern_requested = ctrl->link->phy_params.phy_test_pattern_sel; + + drm_dbg_dp(ctrl->drm_dev, "request: 0x%x\n", pattern_requested); + + if (msm_dp_ctrl_set_vx_px(ctrl, + ctrl->link->phy_params.v_level, + ctrl->link->phy_params.p_level)) { + DRM_ERROR("Failed to set v/p levels\n"); + return false; + } + msm_dp_ctrl_send_phy_pattern(ctrl, pattern_requested); + msm_dp_ctrl_update_phy_vx_px(ctrl, DP_PHY_DPRX); + msm_dp_link_send_test_response(ctrl->link); + + pattern_sent = msm_dp_read_link(ctrl, REG_DP_MAINLINK_READY); + + switch (pattern_sent) { + case MR_LINK_TRAINING1: + success = (pattern_requested == + DP_PHY_TEST_PATTERN_D10_2); + break; + case MR_LINK_SYMBOL_ERM: + success = ((pattern_requested == + DP_PHY_TEST_PATTERN_ERROR_COUNT) || + (pattern_requested == + DP_PHY_TEST_PATTERN_CP2520)); + break; + case MR_LINK_PRBS7: + success = (pattern_requested == + DP_PHY_TEST_PATTERN_PRBS7); + break; + case MR_LINK_CUSTOM80: + success = (pattern_requested == + DP_PHY_TEST_PATTERN_80BIT_CUSTOM); + break; + case MR_LINK_TRAINING4: + success = (pattern_requested == + DP_PHY_TEST_PATTERN_SEL_MASK); + break; + default: + success = false; + } + + drm_dbg_dp(ctrl->drm_dev, "%s: test->0x%x\n", + success ? "success" : "failed", pattern_requested); + return success; +} + +static int msm_dp_ctrl_process_phy_test_request(struct msm_dp_ctrl_private *ctrl) +{ + int ret; + unsigned long pixel_rate; + + if (!ctrl->link->phy_params.phy_test_pattern_sel) { + drm_dbg_dp(ctrl->drm_dev, + "no test pattern selected by sink\n"); + return 0; + } + + /* + * The global reset will need DP link related clocks to be + * running. Add the global reset just before disabling the + * link clocks and core clocks. + */ + msm_dp_ctrl_off(&ctrl->msm_dp_ctrl); + + ret = msm_dp_ctrl_on_link(&ctrl->msm_dp_ctrl); + if (ret) { + DRM_ERROR("failed to enable DP link controller\n"); + return ret; + } + + pixel_rate = ctrl->panel->msm_dp_mode.drm_mode.clock; + ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000); + if (ret) { + DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret); + return ret; + } + + if (ctrl->stream_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "pixel clks already enabled\n"); + } else { + ret = clk_prepare_enable(ctrl->pixel_clk); + if (ret) { + DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret); + return ret; + } + ctrl->stream_clks_on = true; + } + + msm_dp_ctrl_send_phy_test_pattern(ctrl); + + return 0; +} + +void msm_dp_ctrl_handle_sink_request(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + u32 sink_request = 0x0; + + if (!msm_dp_ctrl) { + DRM_ERROR("invalid input\n"); + return; + } + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + sink_request = ctrl->link->sink_request; + + if (sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) { + drm_dbg_dp(ctrl->drm_dev, "PHY_TEST_PATTERN request\n"); + if (msm_dp_ctrl_process_phy_test_request(ctrl)) { + DRM_ERROR("process phy_test_req failed\n"); + return; + } + } + + if (sink_request & DP_LINK_STATUS_UPDATED) { + if (msm_dp_ctrl_link_maintenance(ctrl)) { + DRM_ERROR("LM failed: TEST_LINK_TRAINING\n"); + return; + } + } + + if (sink_request & DP_TEST_LINK_TRAINING) { + msm_dp_link_send_test_response(ctrl->link); + if (msm_dp_ctrl_link_maintenance(ctrl)) { + DRM_ERROR("LM failed: TEST_LINK_TRAINING\n"); + return; + } + } +} + +static bool msm_dp_ctrl_clock_recovery_any_ok( + const u8 link_status[DP_LINK_STATUS_SIZE], + int lane_count) +{ + int reduced_cnt; + + if (lane_count <= 1) + return false; + + /* + * only interested in the lane number after reduced + * lane_count = 4, then only interested in 2 lanes + * lane_count = 2, then only interested in 1 lane + */ + reduced_cnt = lane_count >> 1; + + return drm_dp_clock_recovery_ok(link_status, reduced_cnt); +} + +static bool msm_dp_ctrl_channel_eq_ok(struct msm_dp_ctrl_private *ctrl) +{ + u8 link_status[DP_LINK_STATUS_SIZE]; + int num_lanes = ctrl->link->link_params.num_lanes; + + drm_dp_dpcd_read_link_status(ctrl->aux, link_status); + + return drm_dp_channel_eq_ok(link_status, num_lanes); +} + +int msm_dp_ctrl_on_link(struct msm_dp_ctrl *msm_dp_ctrl) +{ + int rc = 0; + struct msm_dp_ctrl_private *ctrl; + u32 rate; + int link_train_max_retries = 5; + u32 const phy_cts_pixel_clk_khz = 148500; + u8 link_status[DP_LINK_STATUS_SIZE]; + unsigned int training_step; + unsigned long pixel_rate; + + if (!msm_dp_ctrl) + return -EINVAL; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + rate = ctrl->panel->link_info.rate; + pixel_rate = ctrl->panel->msm_dp_mode.drm_mode.clock; + + msm_dp_ctrl_core_clk_enable(&ctrl->msm_dp_ctrl); + + if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) { + drm_dbg_dp(ctrl->drm_dev, + "using phy test link parameters\n"); + if (!pixel_rate) + pixel_rate = phy_cts_pixel_clk_khz; + } else { + ctrl->link->link_params.rate = rate; + ctrl->link->link_params.num_lanes = + ctrl->panel->link_info.num_lanes; + if (ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420) + pixel_rate >>= 1; + } + + drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%lu\n", + ctrl->link->link_params.rate, ctrl->link->link_params.num_lanes, + pixel_rate); + + rc = msm_dp_ctrl_enable_mainlink_clocks(ctrl); + if (rc) + return rc; + + while (--link_train_max_retries) { + training_step = DP_TRAINING_NONE; + rc = msm_dp_ctrl_setup_main_link(ctrl, &training_step); + if (rc == 0) { + /* training completed successfully */ + break; + } else if (training_step == DP_TRAINING_1) { + /* link train_1 failed */ + if (!msm_dp_aux_is_link_connected(ctrl->aux)) + break; + + drm_dp_dpcd_read_link_status(ctrl->aux, link_status); + + rc = msm_dp_ctrl_link_rate_down_shift(ctrl); + if (rc < 0) { /* already in RBR = 1.6G */ + if (msm_dp_ctrl_clock_recovery_any_ok(link_status, + ctrl->link->link_params.num_lanes)) { + /* + * some lanes are ready, + * reduce lane number + */ + rc = msm_dp_ctrl_link_lane_down_shift(ctrl); + if (rc < 0) { /* lane == 1 already */ + /* end with failure */ + break; + } + } else { + /* end with failure */ + break; /* lane == 1 already */ + } + } + } else if (training_step == DP_TRAINING_2) { + /* link train_2 failed */ + if (!msm_dp_aux_is_link_connected(ctrl->aux)) + break; + + drm_dp_dpcd_read_link_status(ctrl->aux, link_status); + + if (!drm_dp_clock_recovery_ok(link_status, + ctrl->link->link_params.num_lanes)) + rc = msm_dp_ctrl_link_rate_down_shift(ctrl); + else + rc = msm_dp_ctrl_link_lane_down_shift(ctrl); + + if (rc < 0) { + /* end with failure */ + break; /* lane == 1 already */ + } + + /* stop link training before start re training */ + msm_dp_ctrl_clear_training_pattern(ctrl, DP_PHY_DPRX); + } + + rc = msm_dp_ctrl_reinitialize_mainlink(ctrl); + if (rc) { + DRM_ERROR("Failed to reinitialize mainlink. rc=%d\n", rc); + break; + } + } + + if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) + return rc; + + if (rc == 0) { /* link train successfully */ + /* + * do not stop train pattern here + * stop link training at on_stream + * to pass compliance test + */ + } else { + /* + * link training failed + * end txing train pattern here + */ + msm_dp_ctrl_clear_training_pattern(ctrl, DP_PHY_DPRX); + + msm_dp_ctrl_deinitialize_mainlink(ctrl); + rc = -ECONNRESET; + } + + return rc; +} + +static int msm_dp_ctrl_link_retrain(struct msm_dp_ctrl_private *ctrl) +{ + int training_step = DP_TRAINING_NONE; + + return msm_dp_ctrl_setup_main_link(ctrl, &training_step); +} + +static void msm_dp_ctrl_config_msa(struct msm_dp_ctrl_private *ctrl, + u32 rate, u32 stream_rate_khz, + bool is_ycbcr_420) +{ + u32 pixel_m, pixel_n; + u32 mvid, nvid, pixel_div = 0, dispcc_input_rate; + u32 const nvid_fixed = DP_LINK_CONSTANT_N_VALUE; + u32 const link_rate_hbr2 = 540000; + u32 const link_rate_hbr3 = 810000; + unsigned long den, num; + + if (rate == link_rate_hbr3) + pixel_div = 6; + else if (rate == 162000 || rate == 270000) + pixel_div = 2; + else if (rate == link_rate_hbr2) + pixel_div = 4; + else + DRM_ERROR("Invalid pixel mux divider\n"); + + dispcc_input_rate = (rate * 10) / pixel_div; + + rational_best_approximation(dispcc_input_rate, stream_rate_khz, + (unsigned long)(1 << 16) - 1, + (unsigned long)(1 << 16) - 1, &den, &num); + + den = ~(den - num); + den = den & 0xFFFF; + pixel_m = num; + pixel_n = den; + + mvid = (pixel_m & 0xFFFF) * 5; + nvid = (0xFFFF & (~pixel_n)) + (pixel_m & 0xFFFF); + + if (nvid < nvid_fixed) { + u32 temp; + + temp = (nvid_fixed / nvid) * nvid; + mvid = (nvid_fixed / nvid) * mvid; + nvid = temp; + } + + if (is_ycbcr_420) + mvid /= 2; + + if (link_rate_hbr2 == rate) + nvid *= 2; + + if (link_rate_hbr3 == rate) + nvid *= 3; + + drm_dbg_dp(ctrl->drm_dev, "mvid=0x%x, nvid=0x%x\n", mvid, nvid); + msm_dp_write_link(ctrl, REG_DP_SOFTWARE_MVID, mvid); + msm_dp_write_link(ctrl, REG_DP_SOFTWARE_NVID, nvid); +} + +int msm_dp_ctrl_on_stream(struct msm_dp_ctrl *msm_dp_ctrl, bool force_link_train) +{ + int ret = 0; + bool mainlink_ready = false; + struct msm_dp_ctrl_private *ctrl; + unsigned long pixel_rate; + unsigned long pixel_rate_orig; + + if (!msm_dp_ctrl) + return -EINVAL; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + pixel_rate = pixel_rate_orig = ctrl->panel->msm_dp_mode.drm_mode.clock; + + if (msm_dp_ctrl->wide_bus_en || ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420) + pixel_rate >>= 1; + + drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%lu\n", + ctrl->link->link_params.rate, + ctrl->link->link_params.num_lanes, pixel_rate); + + drm_dbg_dp(ctrl->drm_dev, + "core_clk_on=%d link_clk_on=%d stream_clk_on=%d\n", + ctrl->core_clks_on, ctrl->link_clks_on, ctrl->stream_clks_on); + + if (!ctrl->link_clks_on) { /* link clk is off */ + ret = msm_dp_ctrl_enable_mainlink_clocks(ctrl); + if (ret) { + DRM_ERROR("Failed to start link clocks. ret=%d\n", ret); + goto end; + } + } + + ret = clk_set_rate(ctrl->pixel_clk, pixel_rate * 1000); + if (ret) { + DRM_ERROR("Failed to set pixel clock rate. ret=%d\n", ret); + goto end; + } + + if (ctrl->stream_clks_on) { + drm_dbg_dp(ctrl->drm_dev, "pixel clks already enabled\n"); + } else { + ret = clk_prepare_enable(ctrl->pixel_clk); + if (ret) { + DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret); + goto end; + } + ctrl->stream_clks_on = true; + } + + if (force_link_train || !msm_dp_ctrl_channel_eq_ok(ctrl)) + msm_dp_ctrl_link_retrain(ctrl); + + /* stop txing train pattern to end link training */ + msm_dp_ctrl_clear_training_pattern(ctrl, DP_PHY_DPRX); + + /* + * Set up transfer unit values and set controller state to send + * video. + */ + reinit_completion(&ctrl->video_comp); + + msm_dp_ctrl_configure_source_params(ctrl); + + msm_dp_ctrl_config_msa(ctrl, + ctrl->link->link_params.rate, + pixel_rate_orig, + ctrl->panel->msm_dp_mode.out_fmt_is_yuv_420); + + msm_dp_panel_clear_dsc_dto(ctrl->panel); + + msm_dp_ctrl_setup_tr_unit(ctrl); + + msm_dp_write_link(ctrl, REG_DP_STATE_CTRL, DP_STATE_CTRL_SEND_VIDEO); + + ret = msm_dp_ctrl_wait4video_ready(ctrl); + if (ret) + return ret; + + mainlink_ready = msm_dp_ctrl_mainlink_ready(ctrl); + drm_dbg_dp(ctrl->drm_dev, + "mainlink %s\n", mainlink_ready ? "READY" : "NOT READY"); + +end: + return ret; +} + +void msm_dp_ctrl_off_link_stream(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct phy *phy; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + phy = ctrl->phy; + + msm_dp_panel_disable_vsc_sdp(ctrl->panel); + + /* set dongle to D3 (power off) mode */ + msm_dp_link_psm_config(ctrl->link, &ctrl->panel->link_info, true); + + msm_dp_ctrl_mainlink_disable(ctrl); + + if (ctrl->stream_clks_on) { + clk_disable_unprepare(ctrl->pixel_clk); + ctrl->stream_clks_on = false; + } + + dev_pm_opp_set_rate(ctrl->dev, 0); + msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl); + + phy_power_off(phy); + + /* aux channel down, reinit phy */ + phy_exit(phy); + phy_init(phy); + + drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); +} + +void msm_dp_ctrl_off_link(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct phy *phy; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + phy = ctrl->phy; + + msm_dp_ctrl_mainlink_disable(ctrl); + + dev_pm_opp_set_rate(ctrl->dev, 0); + msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl); + + DRM_DEBUG_DP("Before, phy=%p init_count=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); + + phy_power_off(phy); + + DRM_DEBUG_DP("After, phy=%p init_count=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); +} + +void msm_dp_ctrl_off(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct phy *phy; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + phy = ctrl->phy; + + msm_dp_panel_disable_vsc_sdp(ctrl->panel); + + msm_dp_ctrl_mainlink_disable(ctrl); + + msm_dp_ctrl_reset(&ctrl->msm_dp_ctrl); + + if (ctrl->stream_clks_on) { + clk_disable_unprepare(ctrl->pixel_clk); + ctrl->stream_clks_on = false; + } + + dev_pm_opp_set_rate(ctrl->dev, 0); + msm_dp_ctrl_link_clk_disable(&ctrl->msm_dp_ctrl); + + phy_power_off(phy); + drm_dbg_dp(ctrl->drm_dev, "phy=%p init=%d power_on=%d\n", + phy, phy->init_count, phy->power_count); +} + +irqreturn_t msm_dp_ctrl_isr(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + u32 isr; + irqreturn_t ret = IRQ_NONE; + + if (!msm_dp_ctrl) + return IRQ_NONE; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + + if (ctrl->panel->psr_cap.version) { + isr = msm_dp_ctrl_get_psr_interrupt(ctrl); + + if (isr) + complete(&ctrl->psr_op_comp); + + if (isr & PSR_EXIT_INT) + drm_dbg_dp(ctrl->drm_dev, "PSR exit done\n"); + + if (isr & PSR_UPDATE_INT) + drm_dbg_dp(ctrl->drm_dev, "PSR frame update done\n"); + + if (isr & PSR_CAPTURE_INT) + drm_dbg_dp(ctrl->drm_dev, "PSR frame capture done\n"); + } + + isr = msm_dp_ctrl_get_interrupt(ctrl); + + if (isr & DP_CTRL_INTR_READY_FOR_VIDEO) { + drm_dbg_dp(ctrl->drm_dev, "dp_video_ready\n"); + complete(&ctrl->video_comp); + ret = IRQ_HANDLED; + } + + if (isr & DP_CTRL_INTR_IDLE_PATTERN_SENT) { + drm_dbg_dp(ctrl->drm_dev, "idle_patterns_sent\n"); + complete(&ctrl->idle_comp); + ret = IRQ_HANDLED; + } + + /* DP aux isr */ + isr = msm_dp_ctrl_get_aux_interrupt(ctrl); + if (isr) + ret |= msm_dp_aux_isr(ctrl->aux, isr); + + return ret; +} + +static const char *core_clks[] = { + "core_iface", + "core_aux", +}; + +static const char *ctrl_clks[] = { + "ctrl_link", + "ctrl_link_iface", +}; + +static int msm_dp_ctrl_clk_init(struct msm_dp_ctrl *msm_dp_ctrl) +{ + struct msm_dp_ctrl_private *ctrl; + struct device *dev; + int i, rc; + + ctrl = container_of(msm_dp_ctrl, struct msm_dp_ctrl_private, msm_dp_ctrl); + dev = ctrl->dev; + + ctrl->num_core_clks = ARRAY_SIZE(core_clks); + ctrl->core_clks = devm_kcalloc(dev, ctrl->num_core_clks, sizeof(*ctrl->core_clks), GFP_KERNEL); + if (!ctrl->core_clks) + return -ENOMEM; + + for (i = 0; i < ctrl->num_core_clks; i++) + ctrl->core_clks[i].id = core_clks[i]; + + rc = devm_clk_bulk_get(dev, ctrl->num_core_clks, ctrl->core_clks); + if (rc) + return rc; + + ctrl->num_link_clks = ARRAY_SIZE(ctrl_clks); + ctrl->link_clks = devm_kcalloc(dev, ctrl->num_link_clks, sizeof(*ctrl->link_clks), GFP_KERNEL); + if (!ctrl->link_clks) + return -ENOMEM; + + for (i = 0; i < ctrl->num_link_clks; i++) + ctrl->link_clks[i].id = ctrl_clks[i]; + + rc = devm_clk_bulk_get(dev, ctrl->num_link_clks, ctrl->link_clks); + if (rc) + return rc; + + ctrl->pixel_clk = devm_clk_get(dev, "stream_pixel"); + if (IS_ERR(ctrl->pixel_clk)) + return PTR_ERR(ctrl->pixel_clk); + + return 0; +} + +struct msm_dp_ctrl *msm_dp_ctrl_get(struct device *dev, struct msm_dp_link *link, + struct msm_dp_panel *panel, struct drm_dp_aux *aux, + struct phy *phy, + void __iomem *ahb_base, + void __iomem *link_base) +{ + struct msm_dp_ctrl_private *ctrl; + int ret; + + if (!dev || !panel || !aux || !link) { + DRM_ERROR("invalid input\n"); + return ERR_PTR(-EINVAL); + } + + ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) { + DRM_ERROR("Mem allocation failure\n"); + return ERR_PTR(-ENOMEM); + } + + ret = devm_pm_opp_set_clkname(dev, "ctrl_link"); + if (ret) { + dev_err(dev, "invalid DP OPP table in device tree\n"); + /* caller do PTR_ERR(opp_table) */ + return (struct msm_dp_ctrl *)ERR_PTR(ret); + } + + /* OPP table is optional */ + ret = devm_pm_opp_of_add_table(dev); + if (ret) + dev_err(dev, "failed to add DP OPP table\n"); + + init_completion(&ctrl->idle_comp); + init_completion(&ctrl->psr_op_comp); + init_completion(&ctrl->video_comp); + + /* in parameters */ + ctrl->panel = panel; + ctrl->aux = aux; + ctrl->link = link; + ctrl->dev = dev; + ctrl->phy = phy; + ctrl->ahb_base = ahb_base; + ctrl->link_base = link_base; + + ret = msm_dp_ctrl_clk_init(&ctrl->msm_dp_ctrl); + if (ret) { + dev_err(dev, "failed to init clocks\n"); + return ERR_PTR(ret); + } + + return &ctrl->msm_dp_ctrl; +} |