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display: Provide dsi command reading/writing to user

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These work while video stream is either disabled or enabled.
This commit is contained in:
CTCaer 2020-12-02 02:09:49 +02:00
parent cf175fc00d
commit aaaf470dcf
2 changed files with 318 additions and 10 deletions
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165
bdk/gfx/di.c
View file

@ -54,6 +54,164 @@ static void _display_dsi_send_cmd(u8 cmd, u32 param, u32 wait)
usleep(wait);
}
static void _display_dsi_read_rx_fifo(u32 *data)
{
u32 fifo_count = DSI(_DSIREG(DSI_STATUS)) & DSI_STATUS_RX_FIFO_SIZE;
for (u32 i = 0; i < fifo_count; i++)
{
// Read or Drain RX FIFO.
if (data)
data[i] = DSI(_DSIREG(DSI_RD_DATA));
else
(void)DSI(_DSIREG(DSI_RD_DATA));
}
}
int display_dsi_read(u8 cmd, u32 len, void *data, bool video_enabled)
{
int res = 0;
u32 host_control = 0;
u32 cmd_timeout = video_enabled ? 0 : 250000;
u32 fifo[DSI_STATUS_RX_FIFO_SIZE] = {0};
// Drain RX FIFO.
_display_dsi_read_rx_fifo(NULL);
// Save host control and enable host cmd packets during video.
if (video_enabled)
{
host_control = DSI(_DSIREG(DSI_HOST_CONTROL));
// Enable vblank interrupt.
DISPLAY_A(_DIREG(DC_CMD_INT_ENABLE)) = DC_CMD_INT_FRAME_END_INT;
// 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)
;
}
// Set reply size.
_display_dsi_send_cmd(MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, len, 0);
_display_dsi_wait(cmd_timeout, _DSIREG(DSI_TRIGGER), DSI_TRIGGER_HOST | DSI_TRIGGER_VIDEO);
// Request register read.
_display_dsi_send_cmd(MIPI_DSI_DCS_READ, cmd, 0);
_display_dsi_wait(cmd_timeout, _DSIREG(DSI_TRIGGER), DSI_TRIGGER_HOST | DSI_TRIGGER_VIDEO);
// Transfer bus control to device for transmitting the reply.
u32 high_speed = video_enabled ? DSI_HOST_CONTROL_HS : 0;
DSI(_DSIREG(DSI_HOST_CONTROL)) = DSI_HOST_CONTROL_TX_TRIG_HOST | DSI_HOST_CONTROL_IMM_BTA | DSI_HOST_CONTROL_CS | DSI_HOST_CONTROL_ECC | high_speed;
_display_dsi_wait(150000, _DSIREG(DSI_HOST_CONTROL), DSI_HOST_CONTROL_IMM_BTA);
// Wait a bit for the reply.
usleep(5000);
// Read RX FIFO.
_display_dsi_read_rx_fifo(fifo);
// Parse packet and copy over the data.
if ((fifo[0] & 0xFF) == DSI_ESCAPE_CMD)
{
// Act based on reply type.
switch (fifo[1] & 0xFF)
{
case GEN_LONG_RD_RES:
case DCS_LONG_RD_RES:
memcpy(data, &fifo[2], MIN((fifo[1] >> 8) & 0xFFFF, len));
break;
case GEN_1_BYTE_SHORT_RD_RES:
case DCS_1_BYTE_SHORT_RD_RES:
memcpy(data, &fifo[2], 1);
break;
case GEN_2_BYTE_SHORT_RD_RES:
case DCS_2_BYTE_SHORT_RD_RES:
memcpy(data, &fifo[2], 2);
break;
case ACK_ERROR_RES:
default:
res = 1;
break;
}
}
// Disable host cmd packets during video and restore host control.
if (video_enabled)
{
// 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;
DSI(_DSIREG(DSI_HOST_CONTROL)) = host_control;
// 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;
}
return res;
}
void display_dsi_write(u8 cmd, u32 len, void *data, bool video_enabled)
{
u32 host_control;
u32 fifo32[DSI_STATUS_RX_FIFO_SIZE] = {0};
u8 *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;
host_control = DSI(_DSIREG(DSI_HOST_CONTROL));
// Enable host transfer trigger.
DSI(_DSIREG(DSI_HOST_CONTROL)) |= DSI_HOST_CONTROL_TX_TRIG_HOST;
switch (len)
{
case 0:
_display_dsi_send_cmd(MIPI_DSI_DCS_SHORT_WRITE, cmd, 0);
break;
case 1:
_display_dsi_send_cmd(MIPI_DSI_DCS_SHORT_WRITE_PARAM, cmd | (*(u8 *)data << 8), 0);
break;
default:
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++)
DSI(_DSIREG(DSI_WR_DATA)) = fifo32[i];
DSI(_DSIREG(DSI_TRIGGER)) = DSI_TRIGGER_HOST;
break;
}
// 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;
DSI(_DSIREG(DSI_HOST_CONTROL)) = host_control;
}
void display_init()
{
// Check if display is already initialized.
@ -175,6 +333,11 @@ void display_init()
// Setup DSI device takeover timeout.
DSI(_DSIREG(DSI_BTA_TIMING)) = 0x50204;
#if 0
// Get Display ID.
_display_id = 0xCCCCCC;
display_dsi_read(MIPI_DCS_GET_DISPLAY_ID, 3, &_display_id, DSI_VIDEO_DISABLED);
#else
// Set reply size.
_display_dsi_send_cmd(MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, 3, 0);
_display_dsi_wait(250000, _DSIREG(DSI_TRIGGER), DSI_TRIGGER_HOST | DSI_TRIGGER_VIDEO);
@ -193,7 +356,7 @@ void display_init()
// MIPI_DCS_GET_DISPLAY_ID reply is a long read, size 3 x u32.
for (u32 i = 0; i < 3; i++)
_display_id = DSI(_DSIREG(DSI_RD_DATA)) & 0xFFFFFF; // Skip ack and msg type info and get the payload (display id).
#endif
// Save raw Display ID to Nyx storage.
nyx_str->info.disp_id = _display_id;

147
bdk/gfx/di.h
View file

@ -21,6 +21,9 @@
#include <memory_map.h>
#include <utils/types.h>
#define DSI_VIDEO_DISABLED 0
#define DSI_VIDEO_ENABLED 1
/*! Display registers. */
#define _DIREG(reg) ((reg) * 4)
@ -68,6 +71,7 @@
#define DC_CMD_INT_STATUS 0x37
#define DC_CMD_INT_MASK 0x38
#define DC_CMD_INT_ENABLE 0x39
#define DC_CMD_INT_FRAME_END_INT BIT(1)
#define DC_CMD_STATE_ACCESS 0x40
#define READ_MUX BIT(0)
@ -360,6 +364,10 @@
/*! Display serial interface registers. */
#define _DSIREG(reg) ((reg) * 4)
#define DSI_INCR_SYNCPT_CNTRL 0x1
#define DSI_INCR_SYNCPT_SOFT_RESET BIT(0)
#define DSI_INCR_SYNCPT_NO_STALL BIT(8)
#define DSI_RD_DATA 0x9
#define DSI_WR_DATA 0xA
@ -403,7 +411,10 @@
#define DSI_TRIGGER_HOST BIT(1)
#define DSI_TX_CRC 0x14
#define DSI_STATUS 0x15
#define DSI_STATUS_RX_FIFO_SIZE 0x1F
#define DSI_INIT_SEQ_CONTROL 0x1A
#define DSI_INIT_SEQ_DATA_0 0x1B
#define DSI_INIT_SEQ_DATA_1 0x1C
@ -450,6 +461,7 @@
#define DSI_PAD_CONTROL_CD 0x4C
#define DSI_VIDEO_MODE_CONTROL 0x4E
#define DSI_CMD_PKT_VID_ENABLE 1
#define DSI_DSI_LINE_TYPE(x) ((x) << 1)
#define DSI_PAD_CONTROL_1 0x4F
#define DSI_PAD_CONTROL_2 0x50
@ -467,6 +479,18 @@
#define DSI_INIT_SEQ_DATA_15 0x5F
#define DSI_INIT_SEQ_DATA_15_B01 0x62
/*! DSI packet defines */
#define DSI_ESCAPE_CMD 0x87
#define DSI_ACK_NO_ERR 0x84
#define ACK_ERROR_RES 0x02
#define GEN_LONG_RD_RES 0x1A
#define DCS_LONG_RD_RES 0x1C
#define GEN_1_BYTE_SHORT_RD_RES 0x11
#define DCS_1_BYTE_SHORT_RD_RES 0x21
#define GEN_2_BYTE_SHORT_RD_RES 0x12
#define DCS_2_BYTE_SHORT_RD_RES 0x22
/*! MIPI registers. */
#define MIPI_CAL_MIPI_CAL_CTRL (0x00 / 0x4)
#define MIPI_CAL_CIL_MIPI_CAL_STATUS (0x08 / 0x4)
@ -489,18 +513,136 @@
#define MIPI_CAL_DSID_MIPI_CAL_CONFIG_2 (0x74 / 0x4)
/*! MIPI CMDs. */
#define MIPI_DSI_V_SYNC_START 0x01
#define MIPI_DSI_COLOR_MODE_OFF 0x02
#define MIPI_DSI_END_OF_TRANSMISSION 0x08
#define MIPI_DSI_NULL_PACKET 0x09
#define MIPI_DSI_V_SYNC_END 0x11
#define MIPI_DSI_COLOR_MODE_ON 0x12
#define MIPI_DSI_BLANKING_PACKET 0x19
#define MIPI_DSI_H_SYNC_START 0x21
#define MIPI_DSI_SHUTDOWN_PERIPHERAL 0x22
#define MIPI_DSI_H_SYNC_END 0x31
#define MIPI_DSI_TURN_ON_PERIPHERAL 0x32
#define MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE 0x37
#define MIPI_DSI_DCS_SHORT_WRITE 0x05
#define MIPI_DSI_DCS_READ 0x06
#define MIPI_DSI_DCS_SHORT_WRITE_PARAM 0x15
#define MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE 0x37
#define MIPI_DSI_DCS_LONG_WRITE 0x39
#define MIPI_DSI_GENERIC_LONG_WRITE 0x29
#define MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM 0x03
#define MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM 0x13
#define MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM 0x23
#define MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM 0x04
#define MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM 0x14
#define MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM 0x24
/*! MIPI DCS CMDs. */
#define MIPI_DCS_NOP 0x00
#define MIPI_DCS_SOFT_RESET 0x01
#define MIPI_DCS_GET_COMPRESSION_MODE 0x03
#define MIPI_DCS_GET_DISPLAY_ID 0x04
#define MIPI_DCS_GET_DISPLAY_ID1 0xDA // GET_DISPLAY_ID Byte0, Module Manufacturer ID.
#define MIPI_DCS_GET_DISPLAY_ID2 0xDB // GET_DISPLAY_ID Byte1, Module/Driver Version ID.
#define MIPI_DCS_GET_DISPLAY_ID3 0xDC // GET_DISPLAY_ID Byte2, Module/Driver ID.
#define MIPI_DCS_GET_NUM_ERRORS 0x05
#define MIPI_DCS_GET_RED_CHANNEL 0x06
#define MIPI_DCS_GET_GREEN_CHANNEL 0x07
#define MIPI_DCS_GET_BLUE_CHANNEL 0x08
#define MIPI_DCS_GET_DISPLAY_STATUS 0x09
#define MIPI_DCS_GET_POWER_MODE 0x0A
#define MIPI_DCS_GET_ADDRESS_MODE 0x0B
#define MIPI_DCS_GET_PIXEL_FORMAT 0x0C
#define MIPI_DCS_GET_DISPLAY_MODE 0x0D
#define MIPI_DCS_GET_SIGNAL_MODE 0x0E
#define MIPI_DCS_GET_DIAGNOSTIC_RESULT 0x0F
#define MIPI_DCS_ENTER_SLEEP_MODE 0x10
#define MIPI_DCS_EXIT_SLEEP_MODE 0x11
#define MIPI_DCS_ENTER_PARTIAL_MODE 0x12
#define MIPI_DCS_ENTER_NORMAL_MODE 0x13
#define MIPI_DCS_EXIT_INVERT_MODE 0x20
#define MIPI_DCS_ENTER_INVERT_MODE 0x21
#define MIPI_DCS_ALL_PIXELS_OFF 0x22
#define MIPI_DCS_ALL_PIXELS_ON 0x23
#define MIPI_DCS_SET_CONTRAST 0x25 // VCON in 40mV steps. 7-bit integer.
#define MIPI_DCS_SET_GAMMA_CURVE 0x26
#define MIPI_DCS_SET_DISPLAY_OFF 0x28
#define MIPI_DCS_SET_DISPLAY_ON 0x29
#define MIPI_DCS_SET_COLUMN_ADDRESS 0x2A
#define MIPI_DCS_SET_PAGE_ADDRESS 0x2B
#define MIPI_DCS_WRITE_MEMORY_START 0x2C
#define MIPI_DCS_WRITE_LUT 0x2D // 24-bit: 192 bytes.
#define MIPI_DCS_READ_MEMORY_START 0x2E
#define MIPI_DCS_SET_PARTIAL_ROWS 0x30
#define MIPI_DCS_SET_PARTIAL_COLUMNS 0x31
#define MIPI_DCS_SET_SCROLL_AREA 0x33
#define MIPI_DCS_SET_TEAR_OFF 0x34
#define MIPI_DCS_SET_TEAR_ON 0x35
#define MIPI_DCS_SET_ADDRESS_MODE 0x36
#define MIPI_DCS_SET_SCROLL_START 0x37
#define MIPI_DCS_EXIT_IDLE_MODE 0x38
#define MIPI_DCS_ENTER_IDLE_MODE 0x39
#define MIPI_DCS_SET_PIXEL_FORMAT 0x3A
#define MIPI_DCS_WRITE_MEMORY_CONTINUE 0x3C
#define MIPI_DCS_READ_MEMORY_CONTINUE 0x3E
#define MIPI_DCS_GET_3D_CONTROL 0x3F
#define MIPI_DCS_SET_VSYNC_TIMING 0x40
#define MIPI_DCS_SET_TEAR_SCANLINE 0x44
#define MIPI_DCS_GET_SCANLINE 0x45
#define MIPI_DCS_SET_TEAR_SCANLINE_WIDTH 0x46
#define MIPI_DCS_GET_SCANLINE_WIDTH 0x47
#define MIPI_DCS_SET_BRIGHTNESS 0x51 // DCS_CONTROL_DISPLAY_BRIGHTNESS_CTRL.
#define MIPI_DCS_GET_BRIGHTNESS 0x52
#define MIPI_DCS_SET_CONTROL_DISPLAY 0x53
#define MIPI_DCS_GET_CONTROL_DISPLAY 0x54
#define MIPI_DCS_SET_CABC_VALUE 0x55
#define MIPI_DCS_GET_CABC_VALUE 0x56
#define MIPI_DCS_SET_CABC_MIN_BRI 0x5E
#define MIPI_DCS_GET_CABC_MIN_BRI 0x5F
#define MIPI_DCS_READ_DDB_START 0xA1
#define MIPI_DCS_READ_DDB_CONTINUE 0xA8
/*! MIPI DCS Panel Private CMDs. */
#define MIPI_DCS_PRIV_UNK_A0 0xA0
#define MIPI_DCS_PRIV_SET_POWER_CONTROL 0xB1
#define MIPI_DCS_PRIV_SET_EXTC 0xB9
#define MIPI_DCS_PRIV_UNK_BD 0xBD
#define MIPI_DCS_PRIV_UNK_D5 0xD5
#define MIPI_DCS_PRIV_UNK_D6 0xD6
#define MIPI_DCS_PRIV_UNK_D8 0xD8
#define MIPI_DCS_PRIV_UNK_D9 0xD9
/*! MIPI DCS CMD Defines. */
#define DCS_POWER_MODE_DISPLAY_ON BIT(2)
#define DCS_POWER_MODE_NORMAL_MODE BIT(3)
#define DCS_POWER_MODE_SLEEP_MODE BIT(4)
#define DCS_POWER_MODE_PARTIAL_MODE BIT(5)
#define DCS_POWER_MODE_IDLE_MODE BIT(6)
#define DCS_ADDRESS_MODE_V_FLIP BIT(0)
#define DCS_ADDRESS_MODE_H_FLIP BIT(1)
#define DCS_ADDRESS_MODE_LATCH_RL BIT(2) // Latch Data Order.
#define DCS_ADDRESS_MODE_BGR_COLOR BIT(3)
#define DCS_ADDRESS_MODE_LINE_ORDER BIT(4) // Line Refresh Order.
#define DCS_ADDRESS_MODE_SWAP_XY BIT(5) // Page/Column Addressing Reverse Order.
#define DCS_ADDRESS_MODE_MIRROR_X BIT(6) // Column Address Order.
#define DCS_ADDRESS_MODE_MIRROR_Y BIT(7) // Page Address Order.
#define DCS_ADDRESS_MODE_ROTATION_MASK (0xF << 4)
#define DCS_ADDRESS_MODE_ROTATION_90 (DCS_ADDRESS_MODE_SWAP_XY | DCS_ADDRESS_MODE_LINE_ORDER)
#define DCS_ADDRESS_MODE_ROTATION_180 (DCS_ADDRESS_MODE_MIRROR_X | DCS_ADDRESS_MODE_LINE_ORDER)
#define DCS_ADDRESS_MODE_ROTATION_270 (DCS_ADDRESS_MODE_SWAP_XY)
#define DCS_GAMMA_CURVE_NONE 0
#define DCS_GAMMA_CURVE_GC0_1_8 BIT(0)
#define DCS_GAMMA_CURVE_GC1_2_5 BIT(1)
#define DCS_GAMMA_CURVE_GC2_1_0 BIT(2)
#define DCS_GAMMA_CURVE_GC3_1_0 BIT(3) // Are there more?
#define DCS_CONTROL_DISPLAY_BACKLIGHT_CTRL BIT(2)
#define DCS_CONTROL_DISPLAY_DIMMING_CTRL BIT(3)
#define DCS_CONTROL_DISPLAY_BRIGHTNESS_CTRL BIT(5)
/* Switch Panels:
*
@ -572,4 +714,7 @@ void display_init_cursor(void *crs_fb, u32 size);
void display_set_pos_cursor(u32 x, u32 y);
void display_deinit_cursor();
void display_dsi_write(u8 cmd, u32 len, void *data, bool video_enabled);
int display_dsi_read(u8 cmd, u32 len, void *data, bool video_enabled);
#endif