u-boot/drivers/video/dw_mipi_dsi.c
Yannick Fertre c45f82bb2e video: dw_mipi_dsi: update log of dphy_enable
The DSI phy can be turned on from the DSI digital interface in
the dphy_enable() function or from a dedicated DSI phy "wrapper"
in phy_ops->init() function. If the STM32MP1 case, the wrapper
is used then the dphy_enable() "warning" traces are not relevant.

This patch moves these "warning" traces to "debug" traces so
they are still available for DSI phy based on the digital
interface in debug logging mode, but not there in normal mode
for both cases.
Note: The related Linux kernel driver uses a "debug"
message too.

Signed-off-by: Yannick Fertre <yannick.fertre@foss.st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Acked-by: Yannick Fertre <yannick.fertre@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
2021-03-11 17:55:44 +01:00

857 lines
23 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2016, Fuzhou Rockchip Electronics Co., Ltd
* Copyright (C) 2019, STMicroelectronics - All Rights Reserved
* Author(s): Philippe Cornu <philippe.cornu@st.com> for STMicroelectronics.
* Yannick Fertre <yannick.fertre@st.com> for STMicroelectronics.
*
* This generic Synopsys DesignWare MIPI DSI host driver is inspired from
* the Linux Kernel driver drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c.
*/
#include <common.h>
#include <clk.h>
#include <dsi_host.h>
#include <dm.h>
#include <errno.h>
#include <panel.h>
#include <video.h>
#include <asm/io.h>
#include <asm/arch/gpio.h>
#include <dm/device-internal.h>
#include <dm/device_compat.h>
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/iopoll.h>
#include <video_bridge.h>
#define HWVER_131 0x31333100 /* IP version 1.31 */
#define DSI_VERSION 0x00
#define VERSION GENMASK(31, 8)
#define DSI_PWR_UP 0x04
#define RESET 0
#define POWERUP BIT(0)
#define DSI_CLKMGR_CFG 0x08
#define TO_CLK_DIVISION(div) (((div) & 0xff) << 8)
#define TX_ESC_CLK_DIVISION(div) ((div) & 0xff)
#define DSI_DPI_VCID 0x0c
#define DPI_VCID(vcid) ((vcid) & 0x3)
#define DSI_DPI_COLOR_CODING 0x10
#define LOOSELY18_EN BIT(8)
#define DPI_COLOR_CODING_16BIT_1 0x0
#define DPI_COLOR_CODING_16BIT_2 0x1
#define DPI_COLOR_CODING_16BIT_3 0x2
#define DPI_COLOR_CODING_18BIT_1 0x3
#define DPI_COLOR_CODING_18BIT_2 0x4
#define DPI_COLOR_CODING_24BIT 0x5
#define DSI_DPI_CFG_POL 0x14
#define COLORM_ACTIVE_LOW BIT(4)
#define SHUTD_ACTIVE_LOW BIT(3)
#define HSYNC_ACTIVE_LOW BIT(2)
#define VSYNC_ACTIVE_LOW BIT(1)
#define DATAEN_ACTIVE_LOW BIT(0)
#define DSI_DPI_LP_CMD_TIM 0x18
#define OUTVACT_LPCMD_TIME(p) (((p) & 0xff) << 16)
#define INVACT_LPCMD_TIME(p) ((p) & 0xff)
#define DSI_DBI_VCID 0x1c
#define DSI_DBI_CFG 0x20
#define DSI_DBI_PARTITIONING_EN 0x24
#define DSI_DBI_CMDSIZE 0x28
#define DSI_PCKHDL_CFG 0x2c
#define CRC_RX_EN BIT(4)
#define ECC_RX_EN BIT(3)
#define BTA_EN BIT(2)
#define EOTP_RX_EN BIT(1)
#define EOTP_TX_EN BIT(0)
#define DSI_GEN_VCID 0x30
#define DSI_MODE_CFG 0x34
#define ENABLE_VIDEO_MODE 0
#define ENABLE_CMD_MODE BIT(0)
#define DSI_VID_MODE_CFG 0x38
#define ENABLE_LOW_POWER (0x3f << 8)
#define ENABLE_LOW_POWER_MASK (0x3f << 8)
#define VID_MODE_TYPE_NON_BURST_SYNC_PULSES 0x0
#define VID_MODE_TYPE_NON_BURST_SYNC_EVENTS 0x1
#define VID_MODE_TYPE_BURST 0x2
#define VID_MODE_TYPE_MASK 0x3
#define DSI_VID_PKT_SIZE 0x3c
#define VID_PKT_SIZE(p) ((p) & 0x3fff)
#define DSI_VID_NUM_CHUNKS 0x40
#define VID_NUM_CHUNKS(c) ((c) & 0x1fff)
#define DSI_VID_NULL_SIZE 0x44
#define VID_NULL_SIZE(b) ((b) & 0x1fff)
#define DSI_VID_HSA_TIME 0x48
#define DSI_VID_HBP_TIME 0x4c
#define DSI_VID_HLINE_TIME 0x50
#define DSI_VID_VSA_LINES 0x54
#define DSI_VID_VBP_LINES 0x58
#define DSI_VID_VFP_LINES 0x5c
#define DSI_VID_VACTIVE_LINES 0x60
#define DSI_EDPI_CMD_SIZE 0x64
#define DSI_CMD_MODE_CFG 0x68
#define MAX_RD_PKT_SIZE_LP BIT(24)
#define DCS_LW_TX_LP BIT(19)
#define DCS_SR_0P_TX_LP BIT(18)
#define DCS_SW_1P_TX_LP BIT(17)
#define DCS_SW_0P_TX_LP BIT(16)
#define GEN_LW_TX_LP BIT(14)
#define GEN_SR_2P_TX_LP BIT(13)
#define GEN_SR_1P_TX_LP BIT(12)
#define GEN_SR_0P_TX_LP BIT(11)
#define GEN_SW_2P_TX_LP BIT(10)
#define GEN_SW_1P_TX_LP BIT(9)
#define GEN_SW_0P_TX_LP BIT(8)
#define ACK_RQST_EN BIT(1)
#define TEAR_FX_EN BIT(0)
#define CMD_MODE_ALL_LP (MAX_RD_PKT_SIZE_LP | \
DCS_LW_TX_LP | \
DCS_SR_0P_TX_LP | \
DCS_SW_1P_TX_LP | \
DCS_SW_0P_TX_LP | \
GEN_LW_TX_LP | \
GEN_SR_2P_TX_LP | \
GEN_SR_1P_TX_LP | \
GEN_SR_0P_TX_LP | \
GEN_SW_2P_TX_LP | \
GEN_SW_1P_TX_LP | \
GEN_SW_0P_TX_LP)
#define DSI_GEN_HDR 0x6c
#define DSI_GEN_PLD_DATA 0x70
#define DSI_CMD_PKT_STATUS 0x74
#define GEN_RD_CMD_BUSY BIT(6)
#define GEN_PLD_R_FULL BIT(5)
#define GEN_PLD_R_EMPTY BIT(4)
#define GEN_PLD_W_FULL BIT(3)
#define GEN_PLD_W_EMPTY BIT(2)
#define GEN_CMD_FULL BIT(1)
#define GEN_CMD_EMPTY BIT(0)
#define DSI_TO_CNT_CFG 0x78
#define HSTX_TO_CNT(p) (((p) & 0xffff) << 16)
#define LPRX_TO_CNT(p) ((p) & 0xffff)
#define DSI_HS_RD_TO_CNT 0x7c
#define DSI_LP_RD_TO_CNT 0x80
#define DSI_HS_WR_TO_CNT 0x84
#define DSI_LP_WR_TO_CNT 0x88
#define DSI_BTA_TO_CNT 0x8c
#define DSI_LPCLK_CTRL 0x94
#define AUTO_CLKLANE_CTRL BIT(1)
#define PHY_TXREQUESTCLKHS BIT(0)
#define DSI_PHY_TMR_LPCLK_CFG 0x98
#define PHY_CLKHS2LP_TIME(lbcc) (((lbcc) & 0x3ff) << 16)
#define PHY_CLKLP2HS_TIME(lbcc) ((lbcc) & 0x3ff)
#define DSI_PHY_TMR_CFG 0x9c
#define PHY_HS2LP_TIME(lbcc) (((lbcc) & 0xff) << 24)
#define PHY_LP2HS_TIME(lbcc) (((lbcc) & 0xff) << 16)
#define MAX_RD_TIME(lbcc) ((lbcc) & 0x7fff)
#define PHY_HS2LP_TIME_V131(lbcc) (((lbcc) & 0x3ff) << 16)
#define PHY_LP2HS_TIME_V131(lbcc) ((lbcc) & 0x3ff)
#define DSI_PHY_RSTZ 0xa0
#define PHY_DISFORCEPLL 0
#define PHY_ENFORCEPLL BIT(3)
#define PHY_DISABLECLK 0
#define PHY_ENABLECLK BIT(2)
#define PHY_RSTZ 0
#define PHY_UNRSTZ BIT(1)
#define PHY_SHUTDOWNZ 0
#define PHY_UNSHUTDOWNZ BIT(0)
#define DSI_PHY_IF_CFG 0xa4
#define PHY_STOP_WAIT_TIME(cycle) (((cycle) & 0xff) << 8)
#define N_LANES(n) (((n) - 1) & 0x3)
#define DSI_PHY_ULPS_CTRL 0xa8
#define DSI_PHY_TX_TRIGGERS 0xac
#define DSI_PHY_STATUS 0xb0
#define PHY_STOP_STATE_CLK_LANE BIT(2)
#define PHY_LOCK BIT(0)
#define DSI_PHY_TST_CTRL0 0xb4
#define PHY_TESTCLK BIT(1)
#define PHY_UNTESTCLK 0
#define PHY_TESTCLR BIT(0)
#define PHY_UNTESTCLR 0
#define DSI_PHY_TST_CTRL1 0xb8
#define PHY_TESTEN BIT(16)
#define PHY_UNTESTEN 0
#define PHY_TESTDOUT(n) (((n) & 0xff) << 8)
#define PHY_TESTDIN(n) ((n) & 0xff)
#define DSI_INT_ST0 0xbc
#define DSI_INT_ST1 0xc0
#define DSI_INT_MSK0 0xc4
#define DSI_INT_MSK1 0xc8
#define DSI_PHY_TMR_RD_CFG 0xf4
#define MAX_RD_TIME_V131(lbcc) ((lbcc) & 0x7fff)
#define PHY_STATUS_TIMEOUT_US 10000
#define CMD_PKT_STATUS_TIMEOUT_US 20000
#define MSEC_PER_SEC 1000
struct dw_mipi_dsi {
struct mipi_dsi_host dsi_host;
struct mipi_dsi_device *device;
void __iomem *base;
unsigned int lane_mbps; /* per lane */
u32 channel;
unsigned int max_data_lanes;
const struct mipi_dsi_phy_ops *phy_ops;
};
static int dsi_mode_vrefresh(struct display_timing *timings)
{
int refresh = 0;
unsigned int calc_val;
u32 htotal = timings->hactive.typ + timings->hfront_porch.typ +
timings->hback_porch.typ + timings->hsync_len.typ;
u32 vtotal = timings->vactive.typ + timings->vfront_porch.typ +
timings->vback_porch.typ + timings->vsync_len.typ;
if (htotal > 0 && vtotal > 0) {
calc_val = timings->pixelclock.typ;
calc_val /= htotal;
refresh = (calc_val + vtotal / 2) / vtotal;
}
return refresh;
}
/*
* The controller should generate 2 frames before
* preparing the peripheral.
*/
static void dw_mipi_dsi_wait_for_two_frames(struct display_timing *timings)
{
int refresh, two_frames;
refresh = dsi_mode_vrefresh(timings);
two_frames = DIV_ROUND_UP(MSEC_PER_SEC, refresh) * 2;
mdelay(two_frames);
}
static inline struct dw_mipi_dsi *host_to_dsi(struct mipi_dsi_host *host)
{
return container_of(host, struct dw_mipi_dsi, dsi_host);
}
static inline void dsi_write(struct dw_mipi_dsi *dsi, u32 reg, u32 val)
{
writel(val, dsi->base + reg);
}
static inline u32 dsi_read(struct dw_mipi_dsi *dsi, u32 reg)
{
return readl(dsi->base + reg);
}
static int dw_mipi_dsi_host_attach(struct mipi_dsi_host *host,
struct mipi_dsi_device *device)
{
struct dw_mipi_dsi *dsi = host_to_dsi(host);
if (device->lanes > dsi->max_data_lanes) {
dev_err(device->dev,
"the number of data lanes(%u) is too many\n",
device->lanes);
return -EINVAL;
}
dsi->channel = device->channel;
return 0;
}
static void dw_mipi_message_config(struct dw_mipi_dsi *dsi,
const struct mipi_dsi_msg *msg)
{
bool lpm = msg->flags & MIPI_DSI_MSG_USE_LPM;
u32 val = 0;
if (msg->flags & MIPI_DSI_MSG_REQ_ACK)
val |= ACK_RQST_EN;
if (lpm)
val |= CMD_MODE_ALL_LP;
dsi_write(dsi, DSI_LPCLK_CTRL, lpm ? 0 : PHY_TXREQUESTCLKHS);
dsi_write(dsi, DSI_CMD_MODE_CFG, val);
}
static int dw_mipi_dsi_gen_pkt_hdr_write(struct dw_mipi_dsi *dsi, u32 hdr_val)
{
int ret;
u32 val, mask;
ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
val, !(val & GEN_CMD_FULL),
CMD_PKT_STATUS_TIMEOUT_US);
if (ret) {
dev_err(dsi->dsi_host.dev,
"failed to get available command FIFO\n");
return ret;
}
dsi_write(dsi, DSI_GEN_HDR, hdr_val);
mask = GEN_CMD_EMPTY | GEN_PLD_W_EMPTY;
ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
val, (val & mask) == mask,
CMD_PKT_STATUS_TIMEOUT_US);
if (ret) {
dev_err(dsi->dsi_host.dev, "failed to write command FIFO\n");
return ret;
}
return 0;
}
static int dw_mipi_dsi_write(struct dw_mipi_dsi *dsi,
const struct mipi_dsi_packet *packet)
{
const u8 *tx_buf = packet->payload;
int len = packet->payload_length, pld_data_bytes = sizeof(u32), ret;
__le32 word;
u32 val;
while (len) {
if (len < pld_data_bytes) {
word = 0;
memcpy(&word, tx_buf, len);
dsi_write(dsi, DSI_GEN_PLD_DATA, le32_to_cpu(word));
len = 0;
} else {
memcpy(&word, tx_buf, pld_data_bytes);
dsi_write(dsi, DSI_GEN_PLD_DATA, le32_to_cpu(word));
tx_buf += pld_data_bytes;
len -= pld_data_bytes;
}
ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
val, !(val & GEN_PLD_W_FULL),
CMD_PKT_STATUS_TIMEOUT_US);
if (ret) {
dev_err(dsi->dsi_host.dev,
"failed to get available write payload FIFO\n");
return ret;
}
}
word = 0;
memcpy(&word, packet->header, sizeof(packet->header));
return dw_mipi_dsi_gen_pkt_hdr_write(dsi, le32_to_cpu(word));
}
static int dw_mipi_dsi_read(struct dw_mipi_dsi *dsi,
const struct mipi_dsi_msg *msg)
{
int i, j, ret, len = msg->rx_len;
u8 *buf = msg->rx_buf;
u32 val;
/* Wait end of the read operation */
ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
val, !(val & GEN_RD_CMD_BUSY),
CMD_PKT_STATUS_TIMEOUT_US);
if (ret) {
dev_err(dsi->dsi_host.dev, "Timeout during read operation\n");
return ret;
}
for (i = 0; i < len; i += 4) {
/* Read fifo must not be empty before all bytes are read */
ret = readl_poll_timeout(dsi->base + DSI_CMD_PKT_STATUS,
val, !(val & GEN_PLD_R_EMPTY),
CMD_PKT_STATUS_TIMEOUT_US);
if (ret) {
dev_err(dsi->dsi_host.dev,
"Read payload FIFO is empty\n");
return ret;
}
val = dsi_read(dsi, DSI_GEN_PLD_DATA);
for (j = 0; j < 4 && j + i < len; j++)
buf[i + j] = val >> (8 * j);
}
return ret;
}
static ssize_t dw_mipi_dsi_host_transfer(struct mipi_dsi_host *host,
const struct mipi_dsi_msg *msg)
{
struct dw_mipi_dsi *dsi = host_to_dsi(host);
struct mipi_dsi_packet packet;
int ret, nb_bytes;
ret = mipi_dsi_create_packet(&packet, msg);
if (ret) {
dev_err(host->dev, "failed to create packet: %d\n", ret);
return ret;
}
dw_mipi_message_config(dsi, msg);
ret = dw_mipi_dsi_write(dsi, &packet);
if (ret)
return ret;
if (msg->rx_buf && msg->rx_len) {
ret = dw_mipi_dsi_read(dsi, msg);
if (ret)
return ret;
nb_bytes = msg->rx_len;
} else {
nb_bytes = packet.size;
}
return nb_bytes;
}
static const struct mipi_dsi_host_ops dw_mipi_dsi_host_ops = {
.attach = dw_mipi_dsi_host_attach,
.transfer = dw_mipi_dsi_host_transfer,
};
static void dw_mipi_dsi_video_mode_config(struct dw_mipi_dsi *dsi)
{
struct mipi_dsi_device *device = dsi->device;
u32 val;
/*
* TODO dw drv improvements
* enabling low power is panel-dependent, we should use the
* panel configuration here...
*/
val = ENABLE_LOW_POWER;
if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
val |= VID_MODE_TYPE_BURST;
else if (device->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
val |= VID_MODE_TYPE_NON_BURST_SYNC_PULSES;
else
val |= VID_MODE_TYPE_NON_BURST_SYNC_EVENTS;
dsi_write(dsi, DSI_VID_MODE_CFG, val);
}
static void dw_mipi_dsi_set_mode(struct dw_mipi_dsi *dsi,
unsigned long mode_flags)
{
const struct mipi_dsi_phy_ops *phy_ops = dsi->phy_ops;
dsi_write(dsi, DSI_PWR_UP, RESET);
if (mode_flags & MIPI_DSI_MODE_VIDEO) {
dsi_write(dsi, DSI_MODE_CFG, ENABLE_VIDEO_MODE);
dw_mipi_dsi_video_mode_config(dsi);
dsi_write(dsi, DSI_LPCLK_CTRL, PHY_TXREQUESTCLKHS);
} else {
dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
}
if (phy_ops->post_set_mode)
phy_ops->post_set_mode(dsi->device, mode_flags);
dsi_write(dsi, DSI_PWR_UP, POWERUP);
}
static void dw_mipi_dsi_init_pll(struct dw_mipi_dsi *dsi)
{
const struct mipi_dsi_phy_ops *phy_ops = dsi->phy_ops;
unsigned int esc_rate;
u32 esc_clk_division;
/*
* The maximum permitted escape clock is 20MHz and it is derived from
* lanebyteclk, which is running at "lane_mbps / 8".
*/
if (phy_ops->get_esc_clk_rate)
phy_ops->get_esc_clk_rate(dsi->device, &esc_rate);
else
esc_rate = 20; /* Default to 20MHz */
/*
* We want:
*
* (lane_mbps >> 3) / esc_clk_division < X
* which is:
* (lane_mbps >> 3) / X > esc_clk_division
*/
esc_clk_division = (dsi->lane_mbps >> 3) / esc_rate + 1;
dsi_write(dsi, DSI_PWR_UP, RESET);
/*
* TODO dw drv improvements
* timeout clock division should be computed with the
* high speed transmission counter timeout and byte lane...
*/
dsi_write(dsi, DSI_CLKMGR_CFG, TO_CLK_DIVISION(10) |
TX_ESC_CLK_DIVISION(esc_clk_division));
}
static void dw_mipi_dsi_dpi_config(struct dw_mipi_dsi *dsi,
struct display_timing *timings)
{
struct mipi_dsi_device *device = dsi->device;
u32 val = 0, color = 0;
switch (device->format) {
case MIPI_DSI_FMT_RGB888:
color = DPI_COLOR_CODING_24BIT;
break;
case MIPI_DSI_FMT_RGB666:
color = DPI_COLOR_CODING_18BIT_2 | LOOSELY18_EN;
break;
case MIPI_DSI_FMT_RGB666_PACKED:
color = DPI_COLOR_CODING_18BIT_1;
break;
case MIPI_DSI_FMT_RGB565:
color = DPI_COLOR_CODING_16BIT_1;
break;
}
if (device->mode_flags & DISPLAY_FLAGS_VSYNC_HIGH)
val |= VSYNC_ACTIVE_LOW;
if (device->mode_flags & DISPLAY_FLAGS_HSYNC_HIGH)
val |= HSYNC_ACTIVE_LOW;
dsi_write(dsi, DSI_DPI_VCID, DPI_VCID(dsi->channel));
dsi_write(dsi, DSI_DPI_COLOR_CODING, color);
dsi_write(dsi, DSI_DPI_CFG_POL, val);
/*
* TODO dw drv improvements
* largest packet sizes during hfp or during vsa/vpb/vfp
* should be computed according to byte lane, lane number and only
* if sending lp cmds in high speed is enable (PHY_TXREQUESTCLKHS)
*/
dsi_write(dsi, DSI_DPI_LP_CMD_TIM, OUTVACT_LPCMD_TIME(4)
| INVACT_LPCMD_TIME(4));
}
static void dw_mipi_dsi_packet_handler_config(struct dw_mipi_dsi *dsi)
{
dsi_write(dsi, DSI_PCKHDL_CFG, CRC_RX_EN | ECC_RX_EN | BTA_EN);
}
static void dw_mipi_dsi_video_packet_config(struct dw_mipi_dsi *dsi,
struct display_timing *timings)
{
/*
* TODO dw drv improvements
* only burst mode is supported here. For non-burst video modes,
* we should compute DSI_VID_PKT_SIZE, DSI_VCCR.NUMC &
* DSI_VNPCR.NPSIZE... especially because this driver supports
* non-burst video modes, see dw_mipi_dsi_video_mode_config()...
*/
dsi_write(dsi, DSI_VID_PKT_SIZE, VID_PKT_SIZE(timings->hactive.typ));
}
static void dw_mipi_dsi_command_mode_config(struct dw_mipi_dsi *dsi)
{
const struct mipi_dsi_phy_ops *phy_ops = dsi->phy_ops;
/*
* TODO dw drv improvements
* compute high speed transmission counter timeout according
* to the timeout clock division (TO_CLK_DIVISION) and byte lane...
*/
dsi_write(dsi, DSI_TO_CNT_CFG, HSTX_TO_CNT(1000) | LPRX_TO_CNT(1000));
/*
* TODO dw drv improvements
* the Bus-Turn-Around Timeout Counter should be computed
* according to byte lane...
*/
dsi_write(dsi, DSI_BTA_TO_CNT, 0xd00);
dsi_write(dsi, DSI_MODE_CFG, ENABLE_CMD_MODE);
if (phy_ops->post_set_mode)
phy_ops->post_set_mode(dsi->device, 0);
}
/* Get lane byte clock cycles. */
static u32 dw_mipi_dsi_get_hcomponent_lbcc(struct dw_mipi_dsi *dsi,
struct display_timing *timings,
u32 hcomponent)
{
u32 frac, lbcc;
lbcc = hcomponent * dsi->lane_mbps * MSEC_PER_SEC / 8;
frac = lbcc % (timings->pixelclock.typ / 1000);
lbcc = lbcc / (timings->pixelclock.typ / 1000);
if (frac)
lbcc++;
return lbcc;
}
static void dw_mipi_dsi_line_timer_config(struct dw_mipi_dsi *dsi,
struct display_timing *timings)
{
u32 htotal, hsa, hbp, lbcc;
htotal = timings->hactive.typ + timings->hfront_porch.typ +
timings->hback_porch.typ + timings->hsync_len.typ;
hsa = timings->hback_porch.typ;
hbp = timings->hsync_len.typ;
/*
* TODO dw drv improvements
* computations below may be improved...
*/
lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, timings, htotal);
dsi_write(dsi, DSI_VID_HLINE_TIME, lbcc);
lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, timings, hsa);
dsi_write(dsi, DSI_VID_HSA_TIME, lbcc);
lbcc = dw_mipi_dsi_get_hcomponent_lbcc(dsi, timings, hbp);
dsi_write(dsi, DSI_VID_HBP_TIME, lbcc);
}
static void dw_mipi_dsi_vertical_timing_config(struct dw_mipi_dsi *dsi,
struct display_timing *timings)
{
u32 vactive, vsa, vfp, vbp;
vactive = timings->vactive.typ;
vsa = timings->vback_porch.typ;
vfp = timings->vfront_porch.typ;
vbp = timings->vsync_len.typ;
dsi_write(dsi, DSI_VID_VACTIVE_LINES, vactive);
dsi_write(dsi, DSI_VID_VSA_LINES, vsa);
dsi_write(dsi, DSI_VID_VFP_LINES, vfp);
dsi_write(dsi, DSI_VID_VBP_LINES, vbp);
}
static void dw_mipi_dsi_dphy_timing_config(struct dw_mipi_dsi *dsi)
{
const struct mipi_dsi_phy_ops *phy_ops = dsi->phy_ops;
struct mipi_dsi_phy_timing timing = {0x40, 0x40, 0x40, 0x40};
u32 hw_version;
if (phy_ops->get_timing)
phy_ops->get_timing(dsi->device, dsi->lane_mbps, &timing);
/*
* TODO dw drv improvements
* data & clock lane timers should be computed according to panel
* blankings and to the automatic clock lane control mode...
* note: DSI_PHY_TMR_CFG.MAX_RD_TIME should be in line with
* DSI_CMD_MODE_CFG.MAX_RD_PKT_SIZE_LP (see CMD_MODE_ALL_LP)
*/
hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;
if (hw_version >= HWVER_131) {
dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME_V131(timing.data_hs2lp) |
PHY_LP2HS_TIME_V131(timing.data_lp2hs));
dsi_write(dsi, DSI_PHY_TMR_RD_CFG, MAX_RD_TIME_V131(10000));
} else {
dsi_write(dsi, DSI_PHY_TMR_CFG, PHY_HS2LP_TIME(timing.data_hs2lp) |
PHY_LP2HS_TIME(timing.data_lp2hs) | MAX_RD_TIME(10000));
}
dsi_write(dsi, DSI_PHY_TMR_LPCLK_CFG, PHY_CLKHS2LP_TIME(timing.clk_hs2lp)
| PHY_CLKLP2HS_TIME(timing.clk_lp2hs));
}
static void dw_mipi_dsi_dphy_interface_config(struct dw_mipi_dsi *dsi)
{
struct mipi_dsi_device *device = dsi->device;
/*
* TODO dw drv improvements
* stop wait time should be the maximum between host dsi
* and panel stop wait times
*/
dsi_write(dsi, DSI_PHY_IF_CFG, PHY_STOP_WAIT_TIME(0x20) |
N_LANES(device->lanes));
}
static void dw_mipi_dsi_dphy_init(struct dw_mipi_dsi *dsi)
{
/* Clear PHY state */
dsi_write(dsi, DSI_PHY_RSTZ, PHY_DISFORCEPLL | PHY_DISABLECLK
| PHY_RSTZ | PHY_SHUTDOWNZ);
dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLR);
dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLR);
}
static void dw_mipi_dsi_dphy_enable(struct dw_mipi_dsi *dsi)
{
u32 val;
int ret;
dsi_write(dsi, DSI_PHY_RSTZ, PHY_ENFORCEPLL | PHY_ENABLECLK |
PHY_UNRSTZ | PHY_UNSHUTDOWNZ);
ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS, val,
val & PHY_LOCK, PHY_STATUS_TIMEOUT_US);
if (ret)
dev_dbg(dsi->dsi_host.dev,
"failed to wait phy lock state\n");
ret = readl_poll_timeout(dsi->base + DSI_PHY_STATUS,
val, val & PHY_STOP_STATE_CLK_LANE,
PHY_STATUS_TIMEOUT_US);
if (ret)
dev_dbg(dsi->dsi_host.dev,
"failed to wait phy clk lane stop state\n");
}
static void dw_mipi_dsi_clear_err(struct dw_mipi_dsi *dsi)
{
dsi_read(dsi, DSI_INT_ST0);
dsi_read(dsi, DSI_INT_ST1);
dsi_write(dsi, DSI_INT_MSK0, 0);
dsi_write(dsi, DSI_INT_MSK1, 0);
}
static void dw_mipi_dsi_bridge_set(struct dw_mipi_dsi *dsi,
struct display_timing *timings)
{
const struct mipi_dsi_phy_ops *phy_ops = dsi->phy_ops;
struct mipi_dsi_device *device = dsi->device;
int ret;
ret = phy_ops->get_lane_mbps(dsi->device, timings, device->lanes,
device->format, &dsi->lane_mbps);
if (ret)
dev_warn(dsi->dsi_host.dev, "Phy get_lane_mbps() failed\n");
dw_mipi_dsi_init_pll(dsi);
dw_mipi_dsi_dpi_config(dsi, timings);
dw_mipi_dsi_packet_handler_config(dsi);
dw_mipi_dsi_video_mode_config(dsi);
dw_mipi_dsi_video_packet_config(dsi, timings);
dw_mipi_dsi_command_mode_config(dsi);
dw_mipi_dsi_line_timer_config(dsi, timings);
dw_mipi_dsi_vertical_timing_config(dsi, timings);
dw_mipi_dsi_dphy_init(dsi);
dw_mipi_dsi_dphy_timing_config(dsi);
dw_mipi_dsi_dphy_interface_config(dsi);
dw_mipi_dsi_clear_err(dsi);
ret = phy_ops->init(dsi->device);
if (ret)
dev_warn(dsi->dsi_host.dev, "Phy init() failed\n");
dw_mipi_dsi_dphy_enable(dsi);
dw_mipi_dsi_wait_for_two_frames(timings);
/* Switch to cmd mode for panel-bridge pre_enable & panel prepare */
dw_mipi_dsi_set_mode(dsi, 0);
}
static int dw_mipi_dsi_init(struct udevice *dev,
struct mipi_dsi_device *device,
struct display_timing *timings,
unsigned int max_data_lanes,
const struct mipi_dsi_phy_ops *phy_ops)
{
struct dw_mipi_dsi *dsi = dev_get_priv(dev);
struct clk clk;
int ret;
if (!phy_ops->init || !phy_ops->get_lane_mbps) {
dev_err(device->dev, "Phy not properly configured\n");
return -ENODEV;
}
dsi->phy_ops = phy_ops;
dsi->max_data_lanes = max_data_lanes;
dsi->device = device;
dsi->dsi_host.dev = (struct device *)dev;
dsi->dsi_host.ops = &dw_mipi_dsi_host_ops;
device->host = &dsi->dsi_host;
dsi->base = (void *)dev_read_addr(device->dev);
if ((fdt_addr_t)dsi->base == FDT_ADDR_T_NONE) {
dev_err(device->dev, "dsi dt register address error\n");
return -EINVAL;
}
ret = clk_get_by_name(device->dev, "px_clk", &clk);
if (ret) {
dev_err(device->dev, "peripheral clock get error %d\n", ret);
return ret;
}
/* get the pixel clock set by the clock framework */
timings->pixelclock.typ = clk_get_rate(&clk);
dw_mipi_dsi_bridge_set(dsi, timings);
return 0;
}
static int dw_mipi_dsi_enable(struct udevice *dev)
{
struct dw_mipi_dsi *dsi = dev_get_priv(dev);
/* Switch to video mode for panel-bridge enable & panel enable */
dw_mipi_dsi_set_mode(dsi, MIPI_DSI_MODE_VIDEO);
return 0;
}
struct dsi_host_ops dw_mipi_dsi_ops = {
.init = dw_mipi_dsi_init,
.enable = dw_mipi_dsi_enable,
};
static int dw_mipi_dsi_probe(struct udevice *dev)
{
return 0;
}
U_BOOT_DRIVER(dw_mipi_dsi) = {
.name = "dw_mipi_dsi",
.id = UCLASS_DSI_HOST,
.probe = dw_mipi_dsi_probe,
.ops = &dw_mipi_dsi_ops,
.priv_auto = sizeof(struct dw_mipi_dsi),
};
MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>");
MODULE_AUTHOR("Yannick Fertré <yannick.fertre@st.com>");
MODULE_DESCRIPTION("DW MIPI DSI host controller driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:dw-mipi-dsi");