/*
* Copyright 2012 - 15 Advanced Micro Devices , Inc .
*
* Permission is hereby granted , free of charge , to any person obtaining a
* copy of this software and associated documentation files ( the " Software " ) ,
* to deal in the Software without restriction , including without limitation
* the rights to use , copy , modify , merge , publish , distribute , sublicense ,
* and / or sell copies of the Software , and to permit persons to whom the
* Software is furnished to do so , subject to the following conditions :
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS OR
* IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY ,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN NO EVENT SHALL
* THE COPYRIGHT HOLDER ( S ) OR AUTHOR ( S ) BE LIABLE FOR ANY CLAIM , DAMAGES OR
* OTHER LIABILITY , WHETHER IN AN ACTION OF CONTRACT , TORT OR OTHERWISE ,
* ARISING FROM , OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE .
*
* Authors : AMD
*
*/
#include "reg_helper.h"
#include "dcn20_optc.h"
#include "dc.h"
#define REG(reg)\
optc1->tg_regs->reg
#define CTX \
optc1->base.ctx
#undef FN
#define FN(reg_name, field_name) \
optc1->tg_shift->field_name, optc1->tg_mask->field_name
/**
* optc2_enable_crtc ( ) - Enable CRTC - call ASIC Control Object to enable Timing generator .
*
* @ optc : timing_generator instance .
*
* Return : If CRTC is enabled , return true .
*
*/
bool optc2_enable_crtc(struct timing_generator *optc)
{
/* TODO FPGA wait for answer
* OTG_MASTER_UPDATE_MODE ! = CRTC_MASTER_UPDATE_MODE
* OTG_MASTER_UPDATE_LOCK ! = CRTC_MASTER_UPDATE_LOCK
*/
struct optc *optc1 = DCN10TG_FROM_TG(optc);
/* opp instance for OTG. For DCN1.0, ODM is remoed.
* OPP and OPTC should 1 : 1 mapping
*/
REG_UPDATE(OPTC_DATA_SOURCE_SELECT,
OPTC_SEG0_SRC_SEL, optc->inst);
/* VTG enable first is for HW workaround */
REG_UPDATE(CONTROL,
VTG0_ENABLE, 1 );
REG_SEQ_START();
/* Enable CRTC */
REG_UPDATE_2(OTG_CONTROL,
OTG_DISABLE_POINT_CNTL, 3 ,
OTG_MASTER_EN, 1 );
REG_SEQ_SUBMIT();
REG_SEQ_WAIT_DONE();
return true ;
}
/**
* optc2_set_gsl ( ) - Assign OTG to GSL groups ,
* set one of the OTGs to be master & rest are slaves
*
* @ optc : timing_generator instance .
* @ params : pointer to gsl_params
*/
void optc2_set_gsl(struct timing_generator *optc,
const struct gsl_params *params)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
/*
* There are ( MAX_OPTC + 1 ) / 2 gsl groups available for use .
* In each group ( assign an OTG to a group by setting OTG_GSLX_EN = 1 ,
* set one of the OTGs to be the master ( OTG_GSL_MASTER_EN = 1 ) and the rest are slaves .
*/
REG_UPDATE_5(OTG_GSL_CONTROL,
OTG_GSL0_EN, params->gsl0_en,
OTG_GSL1_EN, params->gsl1_en,
OTG_GSL2_EN, params->gsl2_en,
OTG_GSL_MASTER_EN, params->gsl_master_en,
OTG_GSL_MASTER_MODE, params->gsl_master_mode);
}
void optc2_set_gsl_source_select(
struct timing_generator *optc,
int group_idx,
uint32_t gsl_ready_signal)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
switch (group_idx) {
case 1 :
REG_UPDATE(GSL_SOURCE_SELECT, GSL0_READY_SOURCE_SEL, gsl_ready_signal);
break ;
case 2 :
REG_UPDATE(GSL_SOURCE_SELECT, GSL1_READY_SOURCE_SEL, gsl_ready_signal);
break ;
case 3 :
REG_UPDATE(GSL_SOURCE_SELECT, GSL2_READY_SOURCE_SEL, gsl_ready_signal);
break ;
default :
break ;
}
}
/* Set DSC-related configuration.
* dsc_mode : 0 disables DSC , other values enable DSC in specified format
* sc_bytes_per_pixel : Bytes per pixel in u3 . 28 format
* dsc_slice_width : Slice width in pixels
*/
void optc2_set_dsc_config(struct timing_generator *optc,
enum optc_dsc_mode dsc_mode,
uint32_t dsc_bytes_per_pixel,
uint32_t dsc_slice_width)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_UPDATE(OPTC_DATA_FORMAT_CONTROL,
OPTC_DSC_MODE, dsc_mode);
REG_SET(OPTC_BYTES_PER_PIXEL, 0 ,
OPTC_DSC_BYTES_PER_PIXEL, dsc_bytes_per_pixel);
REG_UPDATE(OPTC_WIDTH_CONTROL,
OPTC_DSC_SLICE_WIDTH, dsc_slice_width);
}
/* Get DSC-related configuration.
* dsc_mode : 0 disables DSC , other values enable DSC in specified format
*/
void optc2_get_dsc_status(struct timing_generator *optc,
uint32_t *dsc_mode)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_GET(OPTC_DATA_FORMAT_CONTROL,
OPTC_DSC_MODE, dsc_mode);
}
void optc2_set_odm_bypass(struct timing_generator *optc,
const struct dc_crtc_timing *dc_crtc_timing)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
uint32_t h_div_2 = 0 ;
REG_SET_3(OPTC_DATA_SOURCE_SELECT, 0 ,
OPTC_NUM_OF_INPUT_SEGMENT, 0 ,
OPTC_SEG0_SRC_SEL, optc->inst,
OPTC_SEG1_SRC_SEL, 0 xf);
REG_WRITE(OTG_H_TIMING_CNTL, 0 );
h_div_2 = optc->funcs->is_two_pixels_per_container(dc_crtc_timing);
REG_UPDATE(OTG_H_TIMING_CNTL,
OTG_H_TIMING_DIV_BY2, h_div_2);
REG_SET(OPTC_MEMORY_CONFIG, 0 ,
OPTC_MEM_SEL, 0 );
optc1->opp_count = 1 ;
}
void optc2_set_odm_combine(struct timing_generator *optc, int *opp_id, int opp_cnt,
int segment_width, int last_segment_width)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
uint32_t memory_mask;
ASSERT(opp_cnt == 2 );
/* TODO: In pseudocode but does not affect maximus, delete comment if we dont need on asic
* REG_SET ( OTG_GLOBAL_CONTROL2 , 0 , GLOBAL_UPDATE_LOCK_EN , 1 ) ;
* Program OTG register MASTER_UPDATE_LOCK_DB_X / Y to the position before DP frame start
* REG_SET_2 ( OTG_GLOBAL_CONTROL1 , 0 ,
* MASTER_UPDATE_LOCK_DB_X , 160 ,
* MASTER_UPDATE_LOCK_DB_Y , 240 ) ;
*/
/* 2 pieces of memory required for up to 5120 displays, 4 for up to 8192,
* however , for ODM combine we can simplify by always using 4 .
* To make sure there ' s no overlap , each instance " reserves " 2 memories and
* they are uniquely combined here .
*/
memory_mask = 0 x3 << (opp_id[0 ] * 2 ) | 0 x3 << (opp_id[1 ] * 2 );
if (REG(OPTC_MEMORY_CONFIG))
REG_SET(OPTC_MEMORY_CONFIG, 0 ,
OPTC_MEM_SEL, memory_mask);
REG_SET_3(OPTC_DATA_SOURCE_SELECT, 0 ,
OPTC_NUM_OF_INPUT_SEGMENT, 1 ,
OPTC_SEG0_SRC_SEL, opp_id[0 ],
OPTC_SEG1_SRC_SEL, opp_id[1 ]);
REG_UPDATE(OPTC_WIDTH_CONTROL,
OPTC_SEGMENT_WIDTH, segment_width);
REG_SET(OTG_H_TIMING_CNTL, 0 , OTG_H_TIMING_DIV_BY2, 1 );
optc1->opp_count = opp_cnt;
}
void optc2_get_optc_source(struct timing_generator *optc,
uint32_t *num_of_src_opp,
uint32_t *src_opp_id_0,
uint32_t *src_opp_id_1)
{
uint32_t num_of_input_segments;
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_GET_3(OPTC_DATA_SOURCE_SELECT,
OPTC_NUM_OF_INPUT_SEGMENT, &num_of_input_segments,
OPTC_SEG0_SRC_SEL, src_opp_id_0,
OPTC_SEG1_SRC_SEL, src_opp_id_1);
if (num_of_input_segments == 1 )
*num_of_src_opp = 2 ;
else
*num_of_src_opp = 1 ;
/* Work around VBIOS not updating OPTC_NUM_OF_INPUT_SEGMENT */
if (*src_opp_id_1 == 0 xf)
*num_of_src_opp = 1 ;
}
static void optc2_set_dwb_source(struct timing_generator *optc,
uint32_t dwb_pipe_inst)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
if (dwb_pipe_inst == 0 )
REG_UPDATE(DWB_SOURCE_SELECT,
OPTC_DWB0_SOURCE_SELECT, optc->inst);
else if (dwb_pipe_inst == 1 )
REG_UPDATE(DWB_SOURCE_SELECT,
OPTC_DWB1_SOURCE_SELECT, optc->inst);
}
static void optc2_align_vblanks(
struct timing_generator *optc_master,
struct timing_generator *optc_slave,
uint32_t master_pixel_clock_100Hz,
uint32_t slave_pixel_clock_100Hz,
uint8_t master_clock_divider,
uint8_t slave_clock_divider)
{
/* accessing slave OTG registers */
struct optc *optc1 = DCN10TG_FROM_TG(optc_slave);
uint32_t master_v_active = 0 ;
uint32_t master_h_total = 0 ;
uint32_t slave_h_total = 0 ;
uint64_t L, XY;
uint32_t X, Y, p = 10000 ;
uint32_t master_update_lock;
/* disable slave OTG */
REG_UPDATE(OTG_CONTROL, OTG_MASTER_EN, 0 );
/* wait until disabled */
REG_WAIT(OTG_CONTROL,
OTG_CURRENT_MASTER_EN_STATE,
0 , 10 , 5000 );
REG_GET(OTG_H_TOTAL, OTG_H_TOTAL, &slave_h_total);
/* assign slave OTG to be controlled by master update lock */
REG_SET(OTG_GLOBAL_CONTROL0, 0 ,
OTG_MASTER_UPDATE_LOCK_SEL, optc_master->inst);
/* accessing master OTG registers */
optc1 = DCN10TG_FROM_TG(optc_master);
/* saving update lock state, not sure if it's needed */
REG_GET(OTG_MASTER_UPDATE_LOCK,
OTG_MASTER_UPDATE_LOCK, &master_update_lock);
/* unlocking master OTG */
REG_SET(OTG_MASTER_UPDATE_LOCK, 0 ,
OTG_MASTER_UPDATE_LOCK, 0 );
REG_GET(OTG_V_BLANK_START_END,
OTG_V_BLANK_START, &master_v_active);
REG_GET(OTG_H_TOTAL, OTG_H_TOTAL, &master_h_total);
/* calculate when to enable slave OTG */
L = (uint64_t)p * slave_h_total * master_pixel_clock_100Hz;
L = div_u64(L, master_h_total);
L = div_u64(L, slave_pixel_clock_100Hz);
XY = div_u64(L, p);
Y = master_v_active - XY - 1 ;
X = div_u64(((XY + 1 ) * p - L) * master_h_total, p * master_clock_divider);
/*
* set master OTG to unlock when V / H
* counters reach calculated values
*/
REG_UPDATE(OTG_GLOBAL_CONTROL1,
MASTER_UPDATE_LOCK_DB_EN, 1 );
REG_UPDATE_2(OTG_GLOBAL_CONTROL1,
MASTER_UPDATE_LOCK_DB_X,
X,
MASTER_UPDATE_LOCK_DB_Y,
Y);
/* lock master OTG */
REG_SET(OTG_MASTER_UPDATE_LOCK, 0 ,
OTG_MASTER_UPDATE_LOCK, 1 );
REG_WAIT(OTG_MASTER_UPDATE_LOCK,
UPDATE_LOCK_STATUS, 1 , 1 , 10 );
/* accessing slave OTG registers */
optc1 = DCN10TG_FROM_TG(optc_slave);
/*
* enable slave OTG , the OTG is locked with
* master ' s update lock , so it will not run
*/
REG_UPDATE(OTG_CONTROL,
OTG_MASTER_EN, 1 );
/* accessing master OTG registers */
optc1 = DCN10TG_FROM_TG(optc_master);
/*
* unlock master OTG . When master H / V counters reach
* DB_XY point , slave OTG will start
*/
REG_SET(OTG_MASTER_UPDATE_LOCK, 0 ,
OTG_MASTER_UPDATE_LOCK, 0 );
/* accessing slave OTG registers */
optc1 = DCN10TG_FROM_TG(optc_slave);
/* wait for slave OTG to start running*/
REG_WAIT(OTG_CONTROL,
OTG_CURRENT_MASTER_EN_STATE,
1 , 10 , 5000 );
/* accessing master OTG registers */
optc1 = DCN10TG_FROM_TG(optc_master);
/* disable the XY point*/
REG_UPDATE(OTG_GLOBAL_CONTROL1,
MASTER_UPDATE_LOCK_DB_EN, 0 );
REG_UPDATE_2(OTG_GLOBAL_CONTROL1,
MASTER_UPDATE_LOCK_DB_X,
0 ,
MASTER_UPDATE_LOCK_DB_Y,
0 );
/*restore master update lock*/
REG_SET(OTG_MASTER_UPDATE_LOCK, 0 ,
OTG_MASTER_UPDATE_LOCK, master_update_lock);
/* accessing slave OTG registers */
optc1 = DCN10TG_FROM_TG(optc_slave);
/* restore slave to be controlled by it's own */
REG_SET(OTG_GLOBAL_CONTROL0, 0 ,
OTG_MASTER_UPDATE_LOCK_SEL, optc_slave->inst);
}
void optc2_triplebuffer_lock(struct timing_generator *optc)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_SET(OTG_GLOBAL_CONTROL0, 0 ,
OTG_MASTER_UPDATE_LOCK_SEL, optc->inst);
REG_SET(OTG_VUPDATE_KEEPOUT, 0 ,
OTG_MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_EN, 1 );
REG_SET(OTG_MASTER_UPDATE_LOCK, 0 ,
OTG_MASTER_UPDATE_LOCK, 1 );
REG_WAIT(OTG_MASTER_UPDATE_LOCK,
UPDATE_LOCK_STATUS, 1 ,
1 , 10 );
}
void optc2_triplebuffer_unlock(struct timing_generator *optc)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_SET(OTG_MASTER_UPDATE_LOCK, 0 ,
OTG_MASTER_UPDATE_LOCK, 0 );
REG_SET(OTG_VUPDATE_KEEPOUT, 0 ,
OTG_MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_EN, 0 );
}
void optc2_lock_doublebuffer_enable(struct timing_generator *optc)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
uint32_t v_blank_start = 0 ;
uint32_t h_blank_start = 0 ;
REG_UPDATE(OTG_GLOBAL_CONTROL1, MASTER_UPDATE_LOCK_DB_EN, 1 );
REG_UPDATE_2(OTG_GLOBAL_CONTROL2, GLOBAL_UPDATE_LOCK_EN, 1 ,
DIG_UPDATE_LOCATION, 20 );
REG_GET(OTG_V_BLANK_START_END, OTG_V_BLANK_START, &v_blank_start);
REG_GET(OTG_H_BLANK_START_END, OTG_H_BLANK_START, &h_blank_start);
REG_UPDATE_2(OTG_GLOBAL_CONTROL1,
MASTER_UPDATE_LOCK_DB_X,
(h_blank_start - 200 - 1 ) / optc1->opp_count,
MASTER_UPDATE_LOCK_DB_Y,
v_blank_start - 1 );
REG_SET_3(OTG_VUPDATE_KEEPOUT, 0 ,
MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_START_OFFSET, 0 ,
MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_END_OFFSET, 100 ,
OTG_MASTER_UPDATE_LOCK_VUPDATE_KEEPOUT_EN, 1 );
}
void optc2_lock_doublebuffer_disable(struct timing_generator *optc)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_UPDATE_2(OTG_GLOBAL_CONTROL1,
MASTER_UPDATE_LOCK_DB_X,
0 ,
MASTER_UPDATE_LOCK_DB_Y,
0 );
REG_UPDATE_2(OTG_GLOBAL_CONTROL2, GLOBAL_UPDATE_LOCK_EN, 0 ,
DIG_UPDATE_LOCATION, 0 );
REG_UPDATE(OTG_GLOBAL_CONTROL1, MASTER_UPDATE_LOCK_DB_EN, 0 );
}
void optc2_setup_manual_trigger(struct timing_generator *optc)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
/* Set the min/max selectors unconditionally so that
* DMCUB fw may change OTG timings when necessary
* TODO : Remove the w / a after fixing the issue in DMCUB firmware
*/
REG_UPDATE_4(OTG_V_TOTAL_CONTROL,
OTG_V_TOTAL_MIN_SEL, 1 ,
OTG_V_TOTAL_MAX_SEL, 1 ,
OTG_FORCE_LOCK_ON_EVENT, 0 ,
OTG_SET_V_TOTAL_MIN_MASK, (1 << 1 )); /* TRIGA */
REG_SET_8(OTG_TRIGA_CNTL, 0 ,
OTG_TRIGA_SOURCE_SELECT, 21 ,
OTG_TRIGA_SOURCE_PIPE_SELECT, optc->inst,
OTG_TRIGA_RISING_EDGE_DETECT_CNTL, 1 ,
OTG_TRIGA_FALLING_EDGE_DETECT_CNTL, 0 ,
OTG_TRIGA_POLARITY_SELECT, 0 ,
OTG_TRIGA_FREQUENCY_SELECT, 0 ,
OTG_TRIGA_DELAY, 0 ,
OTG_TRIGA_CLEAR, 1 );
}
void optc2_program_manual_trigger(struct timing_generator *optc)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_SET(OTG_TRIGA_MANUAL_TRIG, 0 ,
OTG_TRIGA_MANUAL_TRIG, 1 );
}
bool optc2_configure_crc(struct timing_generator *optc,
const struct crc_params *params)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_SET_2(OTG_CRC_CNTL2, 0 ,
OTG_CRC_DSC_MODE, params->dsc_mode,
OTG_CRC_DATA_STREAM_COMBINE_MODE, params->odm_mode);
return optc1_configure_crc(optc, params);
}
void optc2_get_last_used_drr_vtotal(struct timing_generator *optc, uint32_t *refresh_rate)
{
struct optc *optc1 = DCN10TG_FROM_TG(optc);
REG_GET(OTG_DRR_CONTROL, OTG_V_TOTAL_LAST_USED_BY_DRR, refresh_rate);
}
static const struct timing_generator_funcs dcn20_tg_funcs = {
.validate_timing = optc1_validate_timing,
.program_timing = optc1_program_timing,
.setup_vertical_interrupt0 = optc1_setup_vertical_interrupt0,
.setup_vertical_interrupt1 = optc1_setup_vertical_interrupt1,
.setup_vertical_interrupt2 = optc1_setup_vertical_interrupt2,
.program_global_sync = optc1_program_global_sync,
.enable_crtc = optc2_enable_crtc,
.disable_crtc = optc1_disable_crtc,
/* used by enable_timing_synchronization. Not need for FPGA */
.is_counter_moving = optc1_is_counter_moving,
.get_position = optc1_get_position,
.get_frame_count = optc1_get_vblank_counter,
.get_scanoutpos = optc1_get_crtc_scanoutpos,
.get_otg_active_size = optc1_get_otg_active_size,
.set_early_control = optc1_set_early_control,
/* used by enable_timing_synchronization. Not need for FPGA */
.wait_for_state = optc1_wait_for_state,
.set_blank = optc1_set_blank,
.is_blanked = optc1_is_blanked,
.set_blank_color = optc1_program_blank_color,
.enable_reset_trigger = optc1_enable_reset_trigger,
.enable_crtc_reset = optc1_enable_crtc_reset,
.did_triggered_reset_occur = optc1_did_triggered_reset_occur,
.triplebuffer_lock = optc2_triplebuffer_lock,
.triplebuffer_unlock = optc2_triplebuffer_unlock,
.disable_reset_trigger = optc1_disable_reset_trigger,
.lock = optc1_lock,
.unlock = optc1_unlock,
.lock_doublebuffer_enable = optc2_lock_doublebuffer_enable,
.lock_doublebuffer_disable = optc2_lock_doublebuffer_disable,
.enable_optc_clock = optc1_enable_optc_clock,
.set_drr = optc1_set_drr,
.get_last_used_drr_vtotal = optc2_get_last_used_drr_vtotal,
.set_vtotal_min_max = optc1_set_vtotal_min_max,
.set_static_screen_control = optc1_set_static_screen_control,
.program_stereo = optc1_program_stereo,
.is_stereo_left_eye = optc1_is_stereo_left_eye,
.set_blank_data_double_buffer = optc1_set_blank_data_double_buffer,
.tg_init = optc1_tg_init,
.is_tg_enabled = optc1_is_tg_enabled,
.is_optc_underflow_occurred = optc1_is_optc_underflow_occurred,
.clear_optc_underflow = optc1_clear_optc_underflow,
.setup_global_swap_lock = NULL,
.get_crc = optc1_get_crc,
.configure_crc = optc2_configure_crc,
.set_dsc_config = optc2_set_dsc_config,
.get_dsc_status = optc2_get_dsc_status,
.set_dwb_source = optc2_set_dwb_source,
.set_odm_bypass = optc2_set_odm_bypass,
.set_odm_combine = optc2_set_odm_combine,
.get_optc_source = optc2_get_optc_source,
.set_gsl = optc2_set_gsl,
.set_gsl_source_select = optc2_set_gsl_source_select,
.set_vtg_params = optc1_set_vtg_params,
.program_manual_trigger = optc2_program_manual_trigger,
.setup_manual_trigger = optc2_setup_manual_trigger,
.get_hw_timing = optc1_get_hw_timing,
.align_vblanks = optc2_align_vblanks,
.is_two_pixels_per_container = optc1_is_two_pixels_per_container,
.read_otg_state = optc1_read_otg_state,
};
void dcn20_timing_generator_init(struct optc *optc1)
{
optc1->base.funcs = &dcn20_tg_funcs;
optc1->max_h_total = optc1->tg_mask->OTG_H_TOTAL + 1 ;
optc1->max_v_total = optc1->tg_mask->OTG_V_TOTAL + 1 ;
optc1->min_h_blank = 32 ;
optc1->min_v_blank = 3 ;
optc1->min_v_blank_interlace = 5 ;
optc1->min_h_sync_width = 4 ;// Minimum HSYNC = 8 pixels asked By HW in the first place for no actual reason. Oculus Rift S will not light up with 8 as it's hsyncWidth is 6. Changing it to 4 to fix that issue.
optc1->min_v_sync_width = 1 ;
}
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