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WIP fix pixel ctrl value & how row start is calculated

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This commit is contained in:
Jeff Epler 2025-03-14 10:11:30 -05:00
parent e60a4d174b
commit a939ea65a1
1 changed files with 3 additions and 3 deletions
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6
src/video_hstx.c
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@ -174,7 +174,7 @@ void video_init(uint32_t *framebuffer) {
// Write ctrl and write_addr once when not pixel doubling because they don't // Write ctrl and write_addr once when not pixel doubling because they don't
// change. (write_addr doesn't change when pixel doubling either but we need // change. (write_addr doesn't change when pixel doubling either but we need
// to rewrite it because it is after the ctrl register.) // to rewrite it because it is after the ctrl register.)
dma_channel_hw_addr(self->dma_pixel_channel)->al1_ctrl = dma_ctrl; dma_channel_hw_addr(self->dma_pixel_channel)->al1_ctrl = dma_pixel_ctrl;
dma_channel_hw_addr(self->dma_pixel_channel)->al1_write_addr = dma_write_addr; dma_channel_hw_addr(self->dma_pixel_channel)->al1_write_addr = dma_write_addr;
for (size_t v_scanline = 0; v_scanline < MODE_V_TOTAL_LINES; v_scanline++) { for (size_t v_scanline = 0; v_scanline < MODE_V_TOTAL_LINES; v_scanline++) {
@ -193,8 +193,8 @@ void video_init(uint32_t *framebuffer) {
size_t row = v_scanline - active_start; size_t row = v_scanline - active_start;
size_t transfer_count = words_per_line; size_t transfer_count = words_per_line;
self->dma_commands[command_word++] = transfer_count; self->dma_commands[command_word++] = transfer_count;
uint32_t *row_start = &framebuffer[row * words_per_line]; uintptr_t row_start = row * (DISP_WIDTH / 8) + (uintptr_t)framebuffer;
self->dma_commands[command_word++] = (uintptr_t)row_start; self->dma_commands[command_word++] = row_start;
} }
} }
// Last command is NULL which will trigger an IRQ. // Last command is NULL which will trigger an IRQ.