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dp_ctrl.c
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dp_ctrl.c
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// 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/completion.h>
#include <linux/delay.h>
#include <linux/phy/phy.h>
#include <linux/phy/phy-dp.h>
#include <linux/pm_opp.h>
#include <drm/drm_fixed.h>
#include <drm/drm_dp_helper.h>
#include <drm/drm_print.h>
#include "dp_reg.h"
#include "dp_ctrl.h"
#include "dp_link.h"
#define DP_KHZ_TO_HZ 1000
#define IDLE_PATTERN_COMPLETION_TIMEOUT_JIFFIES (30 * HZ / 1000) /* 30 ms */
#define WAIT_FOR_VIDEO_READY_TIMEOUT_JIFFIES (HZ / 2)
#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 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 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 dp_ctrl_private {
struct dp_ctrl dp_ctrl;
struct device *dev;
struct drm_dp_aux *aux;
struct dp_panel *panel;
struct dp_link *link;
struct dp_power *power;
struct dp_parser *parser;
struct dp_catalog *catalog;
struct completion idle_comp;
struct completion video_comp;
};
static int dp_aux_link_configure(struct drm_dp_aux *aux,
struct 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;
}
void dp_ctrl_push_idle(struct dp_ctrl *dp_ctrl)
{
struct dp_ctrl_private *ctrl;
ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
reinit_completion(&ctrl->idle_comp);
dp_catalog_ctrl_state_ctrl(ctrl->catalog, 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");
pr_debug("mainlink off done\n");
}
static void dp_ctrl_config_ctrl(struct dp_ctrl_private *ctrl)
{
u32 config = 0, tbd;
u8 *dpcd = ctrl->panel->dpcd;
/* Default-> LSCLK DIV: 1/4 LCLK */
config |= (2 << DP_CONFIGURATION_CTRL_LSCLK_DIV_SHIFT);
/* Scrambler reset enable */
if (dpcd[DP_EDP_CONFIGURATION_CAP] & DP_ALTERNATE_SCRAMBLER_RESET_CAP)
config |= DP_CONFIGURATION_CTRL_ASSR;
tbd = dp_link_get_test_bits_depth(ctrl->link,
ctrl->panel->dp_mode.bpp);
if (tbd == DP_TEST_BIT_DEPTH_UNKNOWN) {
pr_debug("BIT_DEPTH not set. Configure default\n");
tbd = DP_TEST_BIT_DEPTH_8;
}
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;
dp_catalog_ctrl_config_ctrl(ctrl->catalog, config);
}
static void dp_ctrl_configure_source_params(struct dp_ctrl_private *ctrl)
{
u32 cc, tb;
dp_catalog_ctrl_lane_mapping(ctrl->catalog);
dp_catalog_ctrl_mainlink_ctrl(ctrl->catalog, true);
dp_ctrl_config_ctrl(ctrl);
tb = dp_link_get_test_bits_depth(ctrl->link,
ctrl->panel->dp_mode.bpp);
cc = dp_link_get_colorimetry_config(ctrl->link);
dp_catalog_ctrl_config_misc(ctrl->catalog, cc, tb);
dp_panel_timing_cfg(ctrl->panel);
}
/*
* 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 dp_panel_update_tu_timings(struct 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 dp_tu_calc_input *in,
struct 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;
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_DEBUG_DP("Info: 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_DEBUG_DP("Info: 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_DEBUG_DP("TU: valid_boundary_link: %d\n",
tu_table->valid_boundary_link);
DRM_DEBUG_DP("TU: delay_start_link: %d\n",
tu_table->delay_start_link);
DRM_DEBUG_DP("TU: boundary_moderation_en: %d\n",
tu_table->boundary_moderation_en);
DRM_DEBUG_DP("TU: valid_lower_boundary_link: %d\n",
tu_table->valid_lower_boundary_link);
DRM_DEBUG_DP("TU: upper_boundary_count: %d\n",
tu_table->upper_boundary_count);
DRM_DEBUG_DP("TU: lower_boundary_count: %d\n",
tu_table->lower_boundary_count);
DRM_DEBUG_DP("TU: tu_size_minus1: %d\n", tu_table->tu_size_minus1);
kfree(tu);
}
static void dp_ctrl_calc_tu_parameters(struct dp_ctrl_private *ctrl,
struct dp_vc_tu_mapping_table *tu_table)
{
struct dp_tu_calc_input in;
struct drm_display_mode *drm_mode;
drm_mode = &ctrl->panel->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->dp_mode.bpp;
in.pixel_enc = 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(&in, tu_table);
}
static void dp_ctrl_setup_tr_unit(struct dp_ctrl_private *ctrl)
{
u32 dp_tu = 0x0;
u32 valid_boundary = 0x0;
u32 valid_boundary2 = 0x0;
struct dp_vc_tu_mapping_table tu_calc_table;
dp_ctrl_calc_tu_parameters(ctrl, &tu_calc_table);
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",
dp_tu, valid_boundary, valid_boundary2);
dp_catalog_ctrl_update_transfer_unit(ctrl->catalog,
dp_tu, valid_boundary, valid_boundary2);
}
static int dp_ctrl_wait4video_ready(struct 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 dp_ctrl_update_vx_px(struct dp_ctrl_private *ctrl)
{
struct dp_link *link = ctrl->link;