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Support for CEC

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* hdmi_cec

* Improve HDMI CEC startup

* hdmi_cec

* Improve HDMI CEC startup

* Use ADV7513 interrupt registers for CEC

Set ADV7513 main 0xE1 to the CEC I2C map address, 0xE2 to 0x00 to power the CEC block, and 0xE3 |= 0x0E for CEC control setup.

Keep HPD forced high through main 0xD6 = 0xC0 after the startup pulse, but clear main 0x94[7] so HPD does not drive the shared HDMI interrupt line.

Clear main 0xA1[6] so the monitor-sense/video-active block stays powered; ADV7513 interrupt status registers 0x94-0x97 are only valid while that block is alive.

Set main 0x95 = 0x07 to enable only CEC RX-ready interrupts, use main 0x97 to clear RX/TX interrupt latches, and clear 0x96/0x97 at init.

Read CEC RX-ready from CEC map 0x49, keep CEC RX enabled with 0x4A = 0x08, release consumed RX slots through 0x4A, and remove fallback polling of RX length registers 0x25/0x37/0x48.

Use main 0x97 bits for CEC TX done/retry/arbitration status, keep CEC TX disabled through 0x11 except while sending, and set the CEC clock divider 0x4E = 0x3D.

Gate RX handling on fpga_get_hdmi_int() so normal CEC polling no longer performs DDC/CEC I2C reads unless the FPGA HDMI interrupt bit is asserted.

Reply to CEC vendor/name discovery so displays can identify MiSTer after registration.

---------

Co-authored-by: misteraddons <51079966+misteraddons@users.noreply.github.com>
This commit is contained in:
Alexey Melnikov
2026-05-14 17:57:10 +08:00
committed by GitHub
parent c066bf86e0
commit 615a69b616
10 changed files with 1574 additions and 1 deletions
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22
input.cpp
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@@ -46,6 +46,17 @@ char joy_bnames[NUMBUTTONS][32] = {};
int joy_bcount = 0;
static struct pollfd pool[NUMDEV + 3];
int xbe2_shift = 0;
static volatile uint32_t input_activity_seq = 0;
static inline void input_mark_activity(void)
{
input_activity_seq++;
}
uint32_t input_activity_get_seq(void)
{
return input_activity_seq;
}
static bool gcdb_use_usb_bcd_device(uint16_t vid, uint16_t pid)
{
@@ -2078,6 +2089,13 @@ void input_uinp_destroy()
}
}
void input_cec_send_key(uint16_t key, bool pressed)
{
if (!key) return;
input_mark_activity();
user_io_kbd(key, pressed ? 1 : 0);
}
static unsigned long uinp_repeat = 0;
static struct input_event uinp_ev;
static void uinp_send_key(uint16_t key, int press)
@@ -5641,6 +5659,8 @@ int input_test(int getchar)
memset(&ev, 0, sizeof(ev));
if (read(pool[i].fd, &ev, sizeof(ev)) == sizeof(ev))
{
if (ev.type == EV_KEY || ev.type == EV_ABS || ev.type == EV_REL) input_mark_activity();
if (getchar)
{
if (ev.type == EV_KEY && ev.value >= 1)
@@ -6138,6 +6158,8 @@ int input_test(int getchar)
uint8_t data[4] = {};
if (read(pool[i].fd, data, sizeof(data)))
{
input_mark_activity();
int edev = i;
int dev = i;
if (input[i].bind >= 0) edev = input[i].bind; // mouse to event