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u-boot/drivers/video/exynos/exynos_mipi_dsi_common.c
Tom Rini 83d290c56f SPDX: Convert all of our single license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 09:34:12 -04:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2012 Samsung Electronics
*
* Author: InKi Dae <inki.dae@samsung.com>
* Author: Donghwa Lee <dh09.lee@samsung.com>
*/
#include <common.h>
#include <lcd.h>
#include <linux/err.h>
#include <asm/arch/dsim.h>
#include <asm/arch/mipi_dsim.h>
#include "exynos_mipi_dsi_lowlevel.h"
#define MHZ (1000 * 1000)
#define FIN_HZ (24 * MHZ)
#define DFIN_PLL_MIN_HZ (6 * MHZ)
#define DFIN_PLL_MAX_HZ (12 * MHZ)
#define DFVCO_MIN_HZ (500 * MHZ)
#define DFVCO_MAX_HZ (1000 * MHZ)
#define TRY_GET_FIFO_TIMEOUT (5000 * 2)
/* MIPI-DSIM status types. */
enum {
DSIM_STATE_INIT, /* should be initialized. */
DSIM_STATE_STOP, /* CPU and LCDC are LP mode. */
DSIM_STATE_HSCLKEN, /* HS clock was enabled. */
DSIM_STATE_ULPS
};
/* define DSI lane types. */
enum {
DSIM_LANE_CLOCK = (1 << 0),
DSIM_LANE_DATA0 = (1 << 1),
DSIM_LANE_DATA1 = (1 << 2),
DSIM_LANE_DATA2 = (1 << 3),
DSIM_LANE_DATA3 = (1 << 4)
};
static unsigned int dpll_table[15] = {
100, 120, 170, 220, 270,
320, 390, 450, 510, 560,
640, 690, 770, 870, 950
};
static void exynos_mipi_dsi_long_data_wr(struct mipi_dsim_device *dsim,
const unsigned char *data0, unsigned int data1)
{
unsigned int data_cnt = 0, payload = 0;
/* in case that data count is more then 4 */
for (data_cnt = 0; data_cnt < data1; data_cnt += 4) {
/*
* after sending 4bytes per one time,
* send remainder data less then 4.
*/
if ((data1 - data_cnt) < 4) {
if ((data1 - data_cnt) == 3) {
payload = data0[data_cnt] |
data0[data_cnt + 1] << 8 |
data0[data_cnt + 2] << 16;
debug("count = 3 payload = %x, %x %x %x\n",
payload, data0[data_cnt],
data0[data_cnt + 1],
data0[data_cnt + 2]);
} else if ((data1 - data_cnt) == 2) {
payload = data0[data_cnt] |
data0[data_cnt + 1] << 8;
debug("count = 2 payload = %x, %x %x\n", payload,
data0[data_cnt], data0[data_cnt + 1]);
} else if ((data1 - data_cnt) == 1) {
payload = data0[data_cnt];
}
} else {
/* send 4bytes per one time. */
payload = data0[data_cnt] |
data0[data_cnt + 1] << 8 |
data0[data_cnt + 2] << 16 |
data0[data_cnt + 3] << 24;
debug("count = 4 payload = %x, %x %x %x %x\n",
payload, *(u8 *)(data0 + data_cnt),
data0[data_cnt + 1],
data0[data_cnt + 2],
data0[data_cnt + 3]);
}
exynos_mipi_dsi_wr_tx_data(dsim, payload);
}
}
int exynos_mipi_dsi_wr_data(struct mipi_dsim_device *dsim, unsigned int data_id,
const unsigned char *data0, unsigned int data1)
{
unsigned int timeout = TRY_GET_FIFO_TIMEOUT;
unsigned long delay_val, delay;
unsigned int check_rx_ack = 0;
if (dsim->state == DSIM_STATE_ULPS) {
debug("state is ULPS.\n");
return -EINVAL;
}
delay_val = MHZ / dsim->dsim_config->esc_clk;
delay = 10 * delay_val;
mdelay(delay);
/* only if transfer mode is LPDT, wait SFR becomes empty. */
if (dsim->state == DSIM_STATE_STOP) {
while (!(exynos_mipi_dsi_get_fifo_state(dsim) &
SFR_HEADER_EMPTY)) {
if ((timeout--) > 0)
mdelay(1);
else {
debug("SRF header fifo is not empty.\n");
return -EINVAL;
}
}
}
switch (data_id) {
/* short packet types of packet types for command. */
case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM:
case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM:
case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM:
case MIPI_DSI_DCS_SHORT_WRITE:
case MIPI_DSI_DCS_SHORT_WRITE_PARAM:
case MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE:
debug("data0 = %x data1 = %x\n",
data0[0], data0[1]);
exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0[0], data0[1]);
if (check_rx_ack) {
/* process response func should be implemented */
return 0;
} else {
return -EINVAL;
}
/* general command */
case MIPI_DSI_COLOR_MODE_OFF:
case MIPI_DSI_COLOR_MODE_ON:
case MIPI_DSI_SHUTDOWN_PERIPHERAL:
case MIPI_DSI_TURN_ON_PERIPHERAL:
exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0[0], data0[1]);
if (check_rx_ack) {
/* process response func should be implemented. */
return 0;
} else {
return -EINVAL;
}
/* packet types for video data */
case MIPI_DSI_V_SYNC_START:
case MIPI_DSI_V_SYNC_END:
case MIPI_DSI_H_SYNC_START:
case MIPI_DSI_H_SYNC_END:
case MIPI_DSI_END_OF_TRANSMISSION:
return 0;
/* short and response packet types for command */
case MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM:
case MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM:
case MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM:
case MIPI_DSI_DCS_READ:
exynos_mipi_dsi_clear_all_interrupt(dsim);
exynos_mipi_dsi_wr_tx_header(dsim, data_id, data0[0], data0[1]);
/* process response func should be implemented. */
return 0;
/* long packet type and null packet */
case MIPI_DSI_NULL_PACKET:
case MIPI_DSI_BLANKING_PACKET:
return 0;
case MIPI_DSI_GENERIC_LONG_WRITE:
case MIPI_DSI_DCS_LONG_WRITE:
{
unsigned int payload = 0;
/* if data count is less then 4, then send 3bytes data. */
if (data1 < 4) {
payload = data0[0] |
data0[1] << 8 |
data0[2] << 16;
exynos_mipi_dsi_wr_tx_data(dsim, payload);
debug("count = %d payload = %x,%x %x %x\n",
data1, payload, data0[0],
data0[1], data0[2]);
} else {
/* in case that data count is more then 4 */
exynos_mipi_dsi_long_data_wr(dsim, data0, data1);
}
/* put data into header fifo */
exynos_mipi_dsi_wr_tx_header(dsim, data_id, data1 & 0xff,
(data1 & 0xff00) >> 8);
}
if (check_rx_ack)
/* process response func should be implemented. */
return 0;
else
return -EINVAL;
/* packet typo for video data */
case MIPI_DSI_PACKED_PIXEL_STREAM_16:
case MIPI_DSI_PACKED_PIXEL_STREAM_18:
case MIPI_DSI_PIXEL_STREAM_3BYTE_18:
case MIPI_DSI_PACKED_PIXEL_STREAM_24:
if (check_rx_ack) {
/* process response func should be implemented. */
return 0;
} else {
return -EINVAL;
}
default:
debug("data id %x is not supported current DSI spec.\n",
data_id);
return -EINVAL;
}
return 0;
}
int exynos_mipi_dsi_pll_on(struct mipi_dsim_device *dsim, unsigned int enable)
{
int sw_timeout;
if (enable) {
sw_timeout = 1000;
exynos_mipi_dsi_clear_interrupt(dsim);
exynos_mipi_dsi_enable_pll(dsim, 1);
while (1) {
sw_timeout--;
if (exynos_mipi_dsi_is_pll_stable(dsim))
return 0;
if (sw_timeout == 0)
return -EINVAL;
}
} else
exynos_mipi_dsi_enable_pll(dsim, 0);
return 0;
}
unsigned long exynos_mipi_dsi_change_pll(struct mipi_dsim_device *dsim,
unsigned int pre_divider, unsigned int main_divider,
unsigned int scaler)
{
unsigned long dfin_pll, dfvco, dpll_out;
unsigned int i, freq_band = 0xf;
dfin_pll = (FIN_HZ / pre_divider);
/******************************************************
* Serial Clock(=ByteClk X 8) FreqBand[3:0] *
******************************************************
* ~ 99.99 MHz 0000
* 100 ~ 119.99 MHz 0001
* 120 ~ 159.99 MHz 0010
* 160 ~ 199.99 MHz 0011
* 200 ~ 239.99 MHz 0100
* 140 ~ 319.99 MHz 0101
* 320 ~ 389.99 MHz 0110
* 390 ~ 449.99 MHz 0111
* 450 ~ 509.99 MHz 1000
* 510 ~ 559.99 MHz 1001
* 560 ~ 639.99 MHz 1010
* 640 ~ 689.99 MHz 1011
* 690 ~ 769.99 MHz 1100
* 770 ~ 869.99 MHz 1101
* 870 ~ 949.99 MHz 1110
* 950 ~ 1000 MHz 1111
******************************************************/
if (dfin_pll < DFIN_PLL_MIN_HZ || dfin_pll > DFIN_PLL_MAX_HZ) {
debug("fin_pll range should be 6MHz ~ 12MHz\n");
exynos_mipi_dsi_enable_afc(dsim, 0, 0);
} else {
if (dfin_pll < 7 * MHZ)
exynos_mipi_dsi_enable_afc(dsim, 1, 0x1);
else if (dfin_pll < 8 * MHZ)
exynos_mipi_dsi_enable_afc(dsim, 1, 0x0);
else if (dfin_pll < 9 * MHZ)
exynos_mipi_dsi_enable_afc(dsim, 1, 0x3);
else if (dfin_pll < 10 * MHZ)
exynos_mipi_dsi_enable_afc(dsim, 1, 0x2);
else if (dfin_pll < 11 * MHZ)
exynos_mipi_dsi_enable_afc(dsim, 1, 0x5);
else
exynos_mipi_dsi_enable_afc(dsim, 1, 0x4);
}
dfvco = dfin_pll * main_divider;
debug("dfvco = %lu, dfin_pll = %lu, main_divider = %d\n",
dfvco, dfin_pll, main_divider);
if (dfvco < DFVCO_MIN_HZ || dfvco > DFVCO_MAX_HZ)
debug("fvco range should be 500MHz ~ 1000MHz\n");
dpll_out = dfvco / (1 << scaler);
debug("dpll_out = %lu, dfvco = %lu, scaler = %d\n",
dpll_out, dfvco, scaler);
for (i = 0; i < ARRAY_SIZE(dpll_table); i++) {
if (dpll_out < dpll_table[i] * MHZ) {
freq_band = i;
break;
}
}
debug("freq_band = %d\n", freq_band);
exynos_mipi_dsi_pll_freq(dsim, pre_divider, main_divider, scaler);
exynos_mipi_dsi_hs_zero_ctrl(dsim, 0);
exynos_mipi_dsi_prep_ctrl(dsim, 0);
/* Freq Band */
exynos_mipi_dsi_pll_freq_band(dsim, freq_band);
/* Stable time */
exynos_mipi_dsi_pll_stable_time(dsim,
dsim->dsim_config->pll_stable_time);
/* Enable PLL */
debug("FOUT of mipi dphy pll is %luMHz\n",
(dpll_out / MHZ));
return dpll_out;
}
int exynos_mipi_dsi_set_clock(struct mipi_dsim_device *dsim,
unsigned int byte_clk_sel, unsigned int enable)
{
unsigned int esc_div;
unsigned long esc_clk_error_rate;
unsigned long hs_clk = 0, byte_clk = 0, escape_clk = 0;
if (enable) {
dsim->e_clk_src = byte_clk_sel;
/* Escape mode clock and byte clock source */
exynos_mipi_dsi_set_byte_clock_src(dsim, byte_clk_sel);
/* DPHY, DSIM Link : D-PHY clock out */
if (byte_clk_sel == DSIM_PLL_OUT_DIV8) {
hs_clk = exynos_mipi_dsi_change_pll(dsim,
dsim->dsim_config->p, dsim->dsim_config->m,
dsim->dsim_config->s);
if (hs_clk == 0) {
debug("failed to get hs clock.\n");
return -EINVAL;
}
byte_clk = hs_clk / 8;
exynos_mipi_dsi_enable_pll_bypass(dsim, 0);
exynos_mipi_dsi_pll_on(dsim, 1);
/* DPHY : D-PHY clock out, DSIM link : external clock out */
} else if (byte_clk_sel == DSIM_EXT_CLK_DIV8)
debug("not support EXT CLK source for MIPI DSIM\n");
else if (byte_clk_sel == DSIM_EXT_CLK_BYPASS)
debug("not support EXT CLK source for MIPI DSIM\n");
/* escape clock divider */
esc_div = byte_clk / (dsim->dsim_config->esc_clk);
debug("esc_div = %d, byte_clk = %lu, esc_clk = %lu\n",
esc_div, byte_clk, dsim->dsim_config->esc_clk);
if ((byte_clk / esc_div) >= (20 * MHZ) ||
(byte_clk / esc_div) > dsim->dsim_config->esc_clk)
esc_div += 1;
escape_clk = byte_clk / esc_div;
debug("escape_clk = %lu, byte_clk = %lu, esc_div = %d\n",
escape_clk, byte_clk, esc_div);
/* enable escape clock. */
exynos_mipi_dsi_enable_byte_clock(dsim, 1);
/* enable byte clk and escape clock */
exynos_mipi_dsi_set_esc_clk_prs(dsim, 1, esc_div);
/* escape clock on lane */
exynos_mipi_dsi_enable_esc_clk_on_lane(dsim,
(DSIM_LANE_CLOCK | dsim->data_lane), 1);
debug("byte clock is %luMHz\n",
(byte_clk / MHZ));
debug("escape clock that user's need is %lu\n",
(dsim->dsim_config->esc_clk / MHZ));
debug("escape clock divider is %x\n", esc_div);
debug("escape clock is %luMHz\n",
((byte_clk / esc_div) / MHZ));
if ((byte_clk / esc_div) > escape_clk) {
esc_clk_error_rate = escape_clk /
(byte_clk / esc_div);
debug("error rate is %lu over.\n",
(esc_clk_error_rate / 100));
} else if ((byte_clk / esc_div) < (escape_clk)) {
esc_clk_error_rate = (byte_clk / esc_div) /
escape_clk;
debug("error rate is %lu under.\n",
(esc_clk_error_rate / 100));
}
} else {
exynos_mipi_dsi_enable_esc_clk_on_lane(dsim,
(DSIM_LANE_CLOCK | dsim->data_lane), 0);
exynos_mipi_dsi_set_esc_clk_prs(dsim, 0, 0);
/* disable escape clock. */
exynos_mipi_dsi_enable_byte_clock(dsim, 0);
if (byte_clk_sel == DSIM_PLL_OUT_DIV8)
exynos_mipi_dsi_pll_on(dsim, 0);
}
return 0;
}
int exynos_mipi_dsi_init_dsim(struct mipi_dsim_device *dsim)
{
dsim->state = DSIM_STATE_INIT;
switch (dsim->dsim_config->e_no_data_lane) {
case DSIM_DATA_LANE_1:
dsim->data_lane = DSIM_LANE_DATA0;
break;
case DSIM_DATA_LANE_2:
dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1;
break;
case DSIM_DATA_LANE_3:
dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1 |
DSIM_LANE_DATA2;
break;
case DSIM_DATA_LANE_4:
dsim->data_lane = DSIM_LANE_DATA0 | DSIM_LANE_DATA1 |
DSIM_LANE_DATA2 | DSIM_LANE_DATA3;
break;
default:
debug("data lane is invalid.\n");
return -EINVAL;
};
exynos_mipi_dsi_sw_reset(dsim);
exynos_mipi_dsi_dp_dn_swap(dsim, 0);
return 0;
}
int exynos_mipi_dsi_enable_frame_done_int(struct mipi_dsim_device *dsim,
unsigned int enable)
{
/* enable only frame done interrupt */
exynos_mipi_dsi_set_interrupt_mask(dsim, INTMSK_FRAME_DONE, enable);
return 0;
}
static void convert_to_fb_videomode(struct fb_videomode *mode1,
struct vidinfo *mode2)
{
mode1->xres = mode2->vl_width;
mode1->yres = mode2->vl_height;
mode1->upper_margin = mode2->vl_vfpd;
mode1->lower_margin = mode2->vl_vbpd;
mode1->left_margin = mode2->vl_hfpd;
mode1->right_margin = mode2->vl_hbpd;
mode1->vsync_len = mode2->vl_vspw;
mode1->hsync_len = mode2->vl_hspw;
}
int exynos_mipi_dsi_set_display_mode(struct mipi_dsim_device *dsim,
struct mipi_dsim_config *dsim_config)
{
struct exynos_platform_mipi_dsim *dsim_pd;
struct fb_videomode lcd_video;
struct vidinfo *vid;
dsim_pd = (struct exynos_platform_mipi_dsim *)dsim->pd;
vid = (struct vidinfo *)dsim_pd->lcd_panel_info;
convert_to_fb_videomode(&lcd_video, vid);
/* in case of VIDEO MODE (RGB INTERFACE), it sets polarities. */
if (dsim->dsim_config->e_interface == (u32) DSIM_VIDEO) {
if (dsim->dsim_config->auto_vertical_cnt == 0) {
exynos_mipi_dsi_set_main_disp_vporch(dsim,
vid->vl_cmd_allow_len,
lcd_video.upper_margin,
lcd_video.lower_margin);
exynos_mipi_dsi_set_main_disp_hporch(dsim,
lcd_video.left_margin,
lcd_video.right_margin);
exynos_mipi_dsi_set_main_disp_sync_area(dsim,
lcd_video.vsync_len,
lcd_video.hsync_len);
}
}
exynos_mipi_dsi_set_main_disp_resol(dsim, lcd_video.xres,
lcd_video.yres);
exynos_mipi_dsi_display_config(dsim, dsim->dsim_config);
debug("lcd panel ==> width = %d, height = %d\n",
lcd_video.xres, lcd_video.yres);
return 0;
}
int exynos_mipi_dsi_init_link(struct mipi_dsim_device *dsim)
{
unsigned int time_out = 100;
switch (dsim->state) {
case DSIM_STATE_INIT:
exynos_mipi_dsi_init_fifo_pointer(dsim, 0x1f);
/* dsi configuration */
exynos_mipi_dsi_init_config(dsim);
exynos_mipi_dsi_enable_lane(dsim, DSIM_LANE_CLOCK, 1);
exynos_mipi_dsi_enable_lane(dsim, dsim->data_lane, 1);
/* set clock configuration */
exynos_mipi_dsi_set_clock(dsim,
dsim->dsim_config->e_byte_clk, 1);
/* check clock and data lane state are stop state */
while (!(exynos_mipi_dsi_is_lane_state(dsim))) {
time_out--;
if (time_out == 0) {
debug("DSI Master is not stop state.\n");
debug("Check initialization process\n");
return -EINVAL;
}
}
dsim->state = DSIM_STATE_STOP;
/* BTA sequence counters */
exynos_mipi_dsi_set_stop_state_counter(dsim,
dsim->dsim_config->stop_holding_cnt);
exynos_mipi_dsi_set_bta_timeout(dsim,
dsim->dsim_config->bta_timeout);
exynos_mipi_dsi_set_lpdr_timeout(dsim,
dsim->dsim_config->rx_timeout);
return 0;
default:
debug("DSI Master is already init.\n");
return 0;
}
return 0;
}
int exynos_mipi_dsi_set_hs_enable(struct mipi_dsim_device *dsim)
{
if (dsim->state == DSIM_STATE_STOP) {
if (dsim->e_clk_src != DSIM_EXT_CLK_BYPASS) {
dsim->state = DSIM_STATE_HSCLKEN;
/* set LCDC and CPU transfer mode to HS. */
exynos_mipi_dsi_set_lcdc_transfer_mode(dsim, 0);
exynos_mipi_dsi_set_cpu_transfer_mode(dsim, 0);
exynos_mipi_dsi_enable_hs_clock(dsim, 1);
return 0;
} else
debug("clock source is external bypass.\n");
} else
debug("DSIM is not stop state.\n");
return 0;
}
int exynos_mipi_dsi_set_data_transfer_mode(struct mipi_dsim_device *dsim,
unsigned int mode)
{
if (mode) {
if (dsim->state != DSIM_STATE_HSCLKEN) {
debug("HS Clock lane is not enabled.\n");
return -EINVAL;
}
exynos_mipi_dsi_set_lcdc_transfer_mode(dsim, 0);
} else {
if (dsim->state == DSIM_STATE_INIT || dsim->state ==
DSIM_STATE_ULPS) {
debug("DSI Master is not STOP or HSDT state.\n");
return -EINVAL;
}
exynos_mipi_dsi_set_cpu_transfer_mode(dsim, 0);
}
return 0;
}
int exynos_mipi_dsi_get_frame_done_status(struct mipi_dsim_device *dsim)
{
return _exynos_mipi_dsi_get_frame_done_status(dsim);
}
int exynos_mipi_dsi_clear_frame_done(struct mipi_dsim_device *dsim)
{
_exynos_mipi_dsi_clear_frame_done(dsim);
return 0;
}
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