mirror of
https://github.com/marqs85/ossc
synced 2026-11-06 15:10:00 +03:00
Peter YooandClaude Fable 5.1
5fd71e8312
tvp_source_setup() disables the TVP7002 internal H-PLL coast for every PC-type preset. That is right for RGBHV, but with sync-on-green or composite sync the serration pulses during vsync disturb the H-PLL every frame; on a NeXTstation Color (1120x832, SoG) this caused continuous horizontal jitter, jitter in the top third of the picture and a periodic HDMI re-sync. With the option on, coast is re-enabled after setup when the sync source is SOG or CSYNC; RGBHV is untouched. Default Off, so existing behaviour is unchanged. Stored as profile item id 68. On the NeXT, this option together with the existing settings Analog sync LPF = 10 MHz, ADC PLL BW = Low and H-PLL Pre/Post-Coast = 4/4 ran 19 minutes without a sync loss, mode re-program or IT6613 video-stable change. SPARCstation 20 framebuffers (ZX, TurboGX) over composite sync are stable without it. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WiXHy7Jhh5yTdsBaenucgw
128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
//
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// Copyright (C) 2015-2023 Markus Hiienkari <mhiienka@niksula.hut.fi>
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//
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// This file is part of Open Source Scan Converter project.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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#ifndef TVP7002_H_
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#define TVP7002_H_
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#include "tvp7002_regs.h"
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#include "video_modes.h"
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#include "sysconfig.h"
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#define DEFAULT_VSYNC_THOLD 0x44
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#define DEFAULT_LINELEN_TOL 0x06
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#define DEFAULT_PRE_COAST 1
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#define DEFAULT_POST_COAST 0
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#define DEFAULT_SYNC_LPF 0
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#define DEFAULT_SYNC_VTH 0x0B
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#define DEFAULT_FINE_GAIN 26
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#define DEFAULT_FINE_OFFSET 0x80
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#define DEFAULT_COARSE_GAIN 0x8
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#define DEFAULT_ALC_H_FILTER 0x3
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#define DEFAULT_ALC_V_FILTER 0x9
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#define TVP_INTCLK_HZ 6500000UL
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#define TVP_EXTCLK_HZ 27000000UL
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typedef enum {
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TVP_INPUT1 = 0,
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TVP_INPUT2 = 1,
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TVP_INPUT3 = 2
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} tvp_input_t;
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typedef enum {
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TVP_SOG1 = 0,
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TVP_SOG2 = 1,
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TVP_SOG3 = 2,
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TVP_HV_A = 3,
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TVP_HV_B = 4,
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TVP_CS_A = 5,
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TVP_CS_B = 6
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} tvp_sync_input_t;
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typedef enum {
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REFCLK_EXT27 = 0,
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REFCLK_INTCLK = 1
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} tvp_refclk_t;
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typedef struct {
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const char *name;
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alt_u16 R_Y;
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alt_u16 R_Pb;
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alt_u16 R_Pr;
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alt_u16 G_Y;
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alt_u16 G_Pb;
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alt_u16 G_Pr;
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alt_u16 B_Y;
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alt_u16 B_Pb;
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alt_u16 B_Pr;
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} ypbpr_to_rgb_csc_t;
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inline alt_u32 tvp_readreg(alt_u32 regaddr);
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inline void tvp_writereg(alt_u32 regaddr, alt_u8 data);
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inline void tvp_reset();
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inline void tvp_disable_output();
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inline void tvp_enable_output();
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inline void tvp_powerdown();
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inline void tvp_powerup();
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inline void tvp_set_hpllcoast(alt_u8 pre, alt_u8 post);
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void tvp_set_coast_enable(alt_u8 enable);
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inline void tvp_set_linelen_tol(alt_u8 val);
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inline void tvp_set_ssthold(alt_u8 vsdetect_thold);
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void tvp_init();
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void tvp_set_gain_offset(color_setup_t *col);
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void tvp_set_full_vs_bypass(alt_u8 enable);
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void tvp_setup_hpll(alt_u16 h_samplerate, alt_u16 pixs_per_line, alt_u16 refclks_per_line, alt_u8 plldivby2);
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void tvp_sel_csc(const ypbpr_to_rgb_csc_t *csc);
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void tvp_set_lpf(alt_u8 val);
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void tvp_set_sync_lpf(alt_u8 val);
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void tvp_set_clp_lpf(alt_u8 val);
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void tvp_set_hpll_phase(alt_u8 val);
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void tvp_set_sog_thold(alt_u8 val);
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void tvp_set_alcfilt(alt_u8 nsv, alt_u8 nsh);
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void tvp_source_setup(video_type type, alt_u16 h_samplerate, alt_u16 pixs_per_line, alt_u16 refclks_per_line, alt_u8 plldivby2, alt_u8 h_synclen_px, alt_8 clamp_user_offset, alt_u8 vmode_changed);
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void tvp_source_sel(tvp_input_t input, tvp_sync_input_t syncinput, video_format fmt);
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alt_u8 tvp_check_sync(tvp_sync_input_t syncinput);
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#endif /* TVP7002_H_ */
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