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Update video_hstx.c

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Liz 2025-08-07 18:49:38 -04:00
parent 189c6b7f3a
commit 561ddc2b0c
1 changed files with 24 additions and 9 deletions
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33
src/video_hstx.c
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@ -261,16 +261,31 @@ void video_init(uint32_t *framebuffer) {
const int pinout[] = { HSTX_D0P, HSTX_D1P, HSTX_D2P };
for(uint lane = 0; lane < 3; lane++ ) {
int bit = pinout[lane];
#if defined(DISP_WIDTH) && DISP_WIDTH == 640 && !defined(USE_PSRAM)
// 640x480 without PSRAM - no mirroring, need inversion
#define NEED_HSTX_INVERSION 1
#else
// All other cases use mirroring which already inverts
#define NEED_HSTX_INVERSION 0
#endif
uint32_t lane_data_sel_bits =
(lane * 10 ) << HSTX_CTRL_BIT0_SEL_P_LSB |
(lane * 10 + 1) << HSTX_CTRL_BIT0_SEL_N_LSB;
// The two halves of each pair get identical data, but one pin is inverted.
hstx_ctrl_hw->bit[(bit ) - HSTX_FIRST_PIN] = lane_data_sel_bits | HSTX_CTRL_BIT0_INV_BITS;
hstx_ctrl_hw->bit[(bit ^ 1) - HSTX_FIRST_PIN] = lane_data_sel_bits;
}
for(uint lane = 0; lane < 3; lane++ ) {
int bit = pinout[lane];
uint32_t lane_data_sel_bits =
(lane * 10 ) << HSTX_CTRL_BIT0_SEL_P_LSB |
(lane * 10 + 1) << HSTX_CTRL_BIT0_SEL_N_LSB;
#if NEED_HSTX_INVERSION
// Invert the data when not using framebuffer mirroring
hstx_ctrl_hw->bit[(bit ) - HSTX_FIRST_PIN] = lane_data_sel_bits | HSTX_CTRL_BIT0_INV_BITS;
hstx_ctrl_hw->bit[(bit ^ 1) - HSTX_FIRST_PIN] = lane_data_sel_bits;
#else
// Normal polarity when framebuffer mirroring handles inversion
hstx_ctrl_hw->bit[(bit ) - HSTX_FIRST_PIN] = lane_data_sel_bits;
hstx_ctrl_hw->bit[(bit ^ 1) - HSTX_FIRST_PIN] = lane_data_sel_bits | HSTX_CTRL_BIT0_INV_BITS;
#endif
}
for (int i = 12; i <= 19; ++i) {
gpio_set_function(i, 0); // HSTX