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videoctrl: generate VBL interrupts.

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This commit is contained in:
Maxim Poliakovski 2023-08-01 17:37:50 +02:00
parent ddf139a659
commit 337a9d6dd0
2 changed files with 26 additions and 0 deletions
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18
devices/video/videoctrl.cpp
View File

@ -155,15 +155,33 @@ void VideoCtrlBase::start_refresh_task() {
this->refresh_task_id = TimerManager::get_instance()->add_cyclic_timer(
refresh_interval,
[this]() {
// assert VBL interrupt
if (this->int_ctrl)
this->int_ctrl->ack_int(this->irq_id, 1);
this->update_screen();
}
);
uint64_t vbl_duration = static_cast<uint64_t>(1.0f / ((double)(this->pixel_clock) /
hori_total / vert_blank) * NS_PER_SEC + 0.5);
this->vbl_end_task_id = TimerManager::get_instance()->add_cyclic_timer(
refresh_interval,
refresh_interval + vbl_duration,
[this]() {
// deassert VBL interrupt
if (this->int_ctrl)
this->int_ctrl->ack_int(this->irq_id, 0);
}
);
}
void VideoCtrlBase::stop_refresh_task() {
if (this->refresh_task_id) {
TimerManager::get_instance()->cancel_timer(this->refresh_task_id);
}
if (this->vbl_end_task_id) {
TimerManager::get_instance()->cancel_timer(this->vbl_end_task_id);
}
}
void VideoCtrlBase::get_palette_colors(uint8_t index, uint8_t& r, uint8_t& g,

8
devices/video/videoctrl.h
View File

@ -25,6 +25,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
#define VIDEO_CTRL_H
#include <core/hostevents.h>
#include <devices/common/hwinterrupt.h>
#include <SDL.h>
#include <cinttypes>
@ -66,6 +67,8 @@ protected:
int active_height; // height of the visible display area
int hori_total = 0;
int vert_total = 0;
int hori_blank = 0;
int vert_blank = 0;
int pixel_depth;
float pixel_clock;
float refresh_rate;
@ -76,6 +79,11 @@ protected:
uint8_t* fb_ptr;
int fb_pitch;
uint32_t refresh_task_id = 0;
uint32_t vbl_end_task_id = 0;
// interrupt suff
InterruptCtrl* int_ctrl = nullptr;
uint32_t irq_id = 0;
std::function<void(uint8_t *dst_buf, int dst_pitch)> convert_fb_cb;