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https://gitlab.com/zephray/glider.git
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89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
//
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// Grimoire
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// Copyright 2025 Wenting Zhang
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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#include "platform.h"
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#include "board.h"
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#include "app.h"
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static void ptn3460_write(uint8_t reg, uint8_t val) {
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int result = pal_i2c_write_reg(PTN3460_I2C, PTN3460_I2C_ADDR, reg, val);
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if (result != 0) {
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syslog_printf("Failed writing data to PTN3460\n");
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}
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}
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static uint8_t ptn3460_read(uint8_t reg) {
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uint8_t val;
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int result = pal_i2c_read_reg(PTN3460_I2C, PTN3460_I2C_ADDR, reg, &val);
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if (result != 0) {
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syslog_printf("Failed reading data from PTN3460\n");
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}
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return val;
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}
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static void ptn3460_select_edid_emulation(uint8_t id) {
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ptn3460_write(0x84, 0x01 | (id << 1));
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}
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void ptn3460_load_edid(uint8_t *edid) {
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int result = pal_i2c_write_longreg(PTN3460_I2C, PTN3460_I2C_ADDR,
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0x00, edid, 128);
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if (result != 0) {
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syslog_printf("Failed writing data to PTN3460\n");
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}
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}
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void ptn3460_early_init(void) {
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gpio_put(DP_PDN, 1);
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}
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void ptn3460_init(void) {
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// wait for HPD to become high
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int ticks = 0;
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while (gpio_get(DP_HPD) != true) {
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ticks ++;
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if (ticks > 500) {
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syslog_printf("PTN3460 boot timeout\n");
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}
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sleep_ms(1);
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}
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syslog_printf("PTN3460 up after %d ms\n", ticks);
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// Enable EDID emulation
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ptn3460_select_edid_emulation(0);
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ptn3460_load_edid(edid_get_raw());
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ptn3460_write(0x81, 0x29); // 18bpp, clock on odd bus, dual channel
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uint8_t rdval = ptn3460_read(0x81);
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syslog_printf("PTN3460 readback value %02x (expected %02x)\n", rdval, 0x29);
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}
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void ptn3460_set_aux_polarity(int reverse) {
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if (reverse)
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ptn3460_write(0x80, 0x02); // Enable AUX reverse
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else
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ptn3460_write(0x80, 0x00); // Disable AUX reverse
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}
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void ptn3460_powerdown(void) {
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gpio_put(DP_PDN, 0);
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}
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