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Code Issues Releases Activity

bdk: di: make dsi normal/vblank writes more robust

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CTCaer 2022-05-08 04:36:20 +03:00
parent dd2bb0f555
commit 6ae4904c8f
1 changed files with 33 additions and 48 deletions
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81
bdk/display/di.c
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@ -246,23 +246,32 @@ int display_dsi_vblank_read(u8 cmd, u32 len, void *data)
return res;
}
void display_dsi_write(u8 cmd, u32 len, void *data, bool video_enabled)
void display_dsi_write(u8 cmd, u32 len, void *data)
{
static u8 *fifo8 = NULL;
static u32 *fifo32 = NULL;
u8 *fifo8;
u32 host_control;
// Allocate fifo buffer.
if (!fifo32)
{
fifo32 = malloc(DSI_STATUS_RX_FIFO_SIZE * 8 * sizeof(u32));
fifo8 = (u8 *)fifo32;
}
// Enable host cmd packets during video and save host control.
if (video_enabled)
DSI(_DSIREG(DSI_VIDEO_MODE_CONTROL)) = DSI_CMD_PKT_VID_ENABLE;
// Prepare data for long write.
if (len >= 2)
{
memcpy(&fifo8[5], data, len);
memset(&fifo8[5] + len, 0, len % sizeof(u32));
len++; // Increase length by CMD.
}
// Save host control.
host_control = DSI(_DSIREG(DSI_HOST_CONTROL));
// Enable host transfer trigger.
DSI(_DSIREG(DSI_HOST_CONTROL)) = host_control | DSI_HOST_CONTROL_TX_TRIG_HOST;
DSI(_DSIREG(DSI_HOST_CONTROL)) = (host_control & ~(DSI_HOST_CONTROL_TX_TRIG_MASK)) | DSI_HOST_CONTROL_TX_TRIG_HOST;
switch (len)
{
@ -275,13 +284,10 @@ void display_dsi_write(u8 cmd, u32 len, void *data, bool video_enabled)
break;
default:
memset(fifo32, 0, DSI_STATUS_RX_FIFO_SIZE * 8 * sizeof(u32));
fifo8 = (u8 *)fifo32;
fifo32[0] = (len << 8) | MIPI_DSI_DCS_LONG_WRITE;
fifo8[4] = cmd;
memcpy(&fifo8[5], data, len);
len += 4 + 1; // Increase length by CMD/length word and DCS CMD.
for (u32 i = 0; i < (ALIGN(len, 4) / 4); i++)
len += sizeof(u32); // Increase length by length word and DCS CMD.
for (u32 i = 0; i < (ALIGN(len, sizeof(u32)) / sizeof(u32)); i++)
DSI(_DSIREG(DSI_WR_DATA)) = fifo32[i];
DSI(_DSIREG(DSI_TRIGGER)) = DSI_TRIGGER_HOST;
break;
@ -290,31 +296,31 @@ void display_dsi_write(u8 cmd, u32 len, void *data, bool video_enabled)
// Wait for the write to happen.
_display_dsi_wait(250000, _DSIREG(DSI_TRIGGER), DSI_TRIGGER_HOST);
// Disable host cmd packets during video and restore host control.
if (video_enabled)
DSI(_DSIREG(DSI_VIDEO_MODE_CONTROL)) = 0;
// Restore host control.
DSI(_DSIREG(DSI_HOST_CONTROL)) = host_control;
}
void display_dsi_vblank_write(u8 cmd, u32 len, void *data)
{
static u8 *fifo8 = NULL;
static u32 *fifo32 = NULL;
u8 *fifo8;
// Allocate fifo buffer.
if (!fifo32)
{
fifo32 = malloc(DSI_STATUS_RX_FIFO_SIZE * 8 * sizeof(u32));
fifo8 = (u8 *)fifo32;
}
// Enable vblank interrupt.
DISPLAY_A(_DIREG(DC_CMD_INT_ENABLE)) = DC_CMD_INT_FRAME_END_INT;
// Prepare data for long write.
if (len >= 2)
{
memcpy(&fifo8[5], data, len);
memset(&fifo8[5] + len, 0, len % sizeof(u32));
len++; // Increase length by CMD.
}
// Use the 4th line to transmit the host cmd packet.
DSI(_DSIREG(DSI_VIDEO_MODE_CONTROL)) = DSI_CMD_PKT_VID_ENABLE | DSI_DSI_LINE_TYPE(4);
// Wait for vblank before starting the transfer.
DISPLAY_A(_DIREG(DC_CMD_INT_STATUS)) = DC_CMD_INT_FRAME_END_INT; // Clear interrupt.
while (!(DISPLAY_A(_DIREG(DC_CMD_INT_STATUS)) & DC_CMD_INT_FRAME_END_INT))
;
_display_dsi_wait_vblank(true);
switch (len)
{
@ -327,36 +333,15 @@ void display_dsi_vblank_write(u8 cmd, u32 len, void *data)
break;
default:
memset(fifo32, 0, DSI_STATUS_RX_FIFO_SIZE * 8 * sizeof(u32));
fifo8 = (u8 *)fifo32;
fifo32[0] = (len << 8) | MIPI_DSI_DCS_LONG_WRITE;
fifo8[4] = cmd;
memcpy(&fifo8[5], data, len);
len += 4 + 1; // Increase length by CMD/length word and DCS CMD.
for (u32 i = 0; i < (ALIGN(len, 4) / 4); i++)
len += sizeof(u32); // Increase length by length word and DCS CMD.
for (u32 i = 0; i < (ALIGN(len, sizeof(u32)) / sizeof(u32)); i++)
DSI(_DSIREG(DSI_WR_DATA)) = fifo32[i];
break;
}
// Wait for vblank before reseting sync points.
DISPLAY_A(_DIREG(DC_CMD_INT_STATUS)) = DC_CMD_INT_FRAME_END_INT; // Clear interrupt.
while (!(DISPLAY_A(_DIREG(DC_CMD_INT_STATUS)) & DC_CMD_INT_FRAME_END_INT))
;
// Reset all states of syncpt block.
DSI(_DSIREG(DSI_INCR_SYNCPT_CNTRL)) = DSI_INCR_SYNCPT_SOFT_RESET;
usleep(300); // Stabilization delay.
// Clear syncpt block reset.
DSI(_DSIREG(DSI_INCR_SYNCPT_CNTRL)) = 0;
usleep(300); // Stabilization delay.
// Restore video mode and host control.
DSI(_DSIREG(DSI_VIDEO_MODE_CONTROL)) = 0;
// Disable and clear vblank interrupt.
DISPLAY_A(_DIREG(DC_CMD_INT_ENABLE)) = 0;
DISPLAY_A(_DIREG(DC_CMD_INT_STATUS)) = DC_CMD_INT_FRAME_END_INT;
_display_dsi_wait_vblank(false);
}
void display_init()