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u-boot/drivers/video/rockchip/dw_mipi_dsi_rockchip.c
Chris Morgan 6fa83833b0 rockchip: video: Add support for RK3568 DSI Host 
Add support for DSI Host controller on Rockchip RK3568. This driver
is heavily based on the Rockchip dw_mipi_dsi_rockchip.c driver in
Linux and the stm32_dsi.c driver in U-Boot. It should be easy to add
support for other SoCs as the only missing component from the mainline
driver is setting the VOP big or VOP little (which the rk3568 does
not have).

Driver was tested for use in sending commands to a DSI panel in order
to obtain the panel ID.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
2023-04-21 15:16:01 +08:00

898 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Author(s): Chris Morgan <macromorgan@hotmail.com>
*
* This MIPI DSI controller driver is heavily based on the Linux Kernel
* driver from drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c and the
* U-Boot driver from drivers/video/stm32/stm32_dsi.c.
*/
#define LOG_CATEGORY UCLASS_VIDEO_BRIDGE
#include <clk.h>
#include <dm.h>
#include <div64.h>
#include <dsi_host.h>
#include <generic-phy.h>
#include <mipi_dsi.h>
#include <panel.h>
#include <phy-mipi-dphy.h>
#include <reset.h>
#include <video_bridge.h>
#include <dm/device_compat.h>
#include <dm/lists.h>
#include <linux/iopoll.h>
#include <common.h>
#include <log.h>
#include <video.h>
#include <asm/io.h>
#include <dm/device-internal.h>
#include <linux/bitops.h>
#define USEC_PER_SEC 1000000L
/*
* DSI wrapper registers & bit definitions
* Note: registers are named as in the Reference Manual
*/
#define DSI_WCR 0x0404 /* Wrapper Control Reg */
#define WCR_DSIEN BIT(3) /* DSI ENable */
#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) << 0)
#define BYPASS_VCO_RANGE BIT(7)
#define VCO_RANGE_CON_SEL(val) (((val) & 0x7) << 3)
#define VCO_IN_CAP_CON_DEFAULT (0x0 << 1)
#define VCO_IN_CAP_CON_LOW (0x1 << 1)
#define VCO_IN_CAP_CON_HIGH (0x2 << 1)
#define REF_BIAS_CUR_SEL BIT(0)
#define CP_CURRENT_3UA 0x1
#define CP_CURRENT_4_5UA 0x2
#define CP_CURRENT_7_5UA 0x6
#define CP_CURRENT_6UA 0x9
#define CP_CURRENT_12UA 0xb
#define CP_CURRENT_SEL(val) ((val) & 0xf)
#define CP_PROGRAM_EN BIT(7)
#define LPF_RESISTORS_15_5KOHM 0x1
#define LPF_RESISTORS_13KOHM 0x2
#define LPF_RESISTORS_11_5KOHM 0x4
#define LPF_RESISTORS_10_5KOHM 0x8
#define LPF_RESISTORS_8KOHM 0x10
#define LPF_PROGRAM_EN BIT(6)
#define LPF_RESISTORS_SEL(val) ((val) & 0x3f)
#define HSFREQRANGE_SEL(val) (((val) & 0x3f) << 1)
#define INPUT_DIVIDER(val) (((val) - 1) & 0x7f)
#define LOW_PROGRAM_EN 0
#define HIGH_PROGRAM_EN BIT(7)
#define LOOP_DIV_LOW_SEL(val) (((val) - 1) & 0x1f)
#define LOOP_DIV_HIGH_SEL(val) ((((val) - 1) >> 5) & 0xf)
#define PLL_LOOP_DIV_EN BIT(5)
#define PLL_INPUT_DIV_EN BIT(4)
#define POWER_CONTROL BIT(6)
#define INTERNAL_REG_CURRENT BIT(3)
#define BIAS_BLOCK_ON BIT(2)
#define BANDGAP_ON BIT(0)
#define TER_RESISTOR_HIGH BIT(7)
#define TER_RESISTOR_LOW 0
#define LEVEL_SHIFTERS_ON BIT(6)
#define TER_CAL_DONE BIT(5)
#define SETRD_MAX (0x7 << 2)
#define POWER_MANAGE BIT(1)
#define TER_RESISTORS_ON BIT(0)
#define BIASEXTR_SEL(val) ((val) & 0x7)
#define BANDGAP_SEL(val) ((val) & 0x7)
#define TLP_PROGRAM_EN BIT(7)
#define THS_PRE_PROGRAM_EN BIT(7)
#define THS_ZERO_PROGRAM_EN BIT(6)
#define PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL 0x10
#define PLL_CP_CONTROL_PLL_LOCK_BYPASS 0x11
#define PLL_LPF_AND_CP_CONTROL 0x12
#define PLL_INPUT_DIVIDER_RATIO 0x17
#define PLL_LOOP_DIVIDER_RATIO 0x18
#define PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL 0x19
#define BANDGAP_AND_BIAS_CONTROL 0x20
#define TERMINATION_RESISTER_CONTROL 0x21
#define AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY 0x22
#define HS_RX_CONTROL_OF_LANE_CLK 0x34
#define HS_RX_CONTROL_OF_LANE_0 0x44
#define HS_RX_CONTROL_OF_LANE_1 0x54
#define HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL 0x60
#define HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL 0x61
#define HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL 0x62
#define HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL 0x63
#define HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL 0x64
#define HS_TX_CLOCK_LANE_POST_TIME_CONTROL 0x65
#define HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL 0x70
#define HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL 0x71
#define HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL 0x72
#define HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL 0x73
#define HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL 0x74
#define HS_RX_DATA_LANE_THS_SETTLE_CONTROL 0x75
#define HS_RX_CONTROL_OF_LANE_2 0x84
#define HS_RX_CONTROL_OF_LANE_3 0x94
#define RK3568_GRF_VO_CON2 0x0368
#define RK3568_DSI0_SKEWCALHS (0x1f << 11)
#define RK3568_DSI0_FORCETXSTOPMODE (0xf << 4)
#define RK3568_DSI0_TURNDISABLE BIT(2)
#define RK3568_DSI0_FORCERXMODE BIT(0)
/*
* Note these registers do not appear in the datasheet, they are
* however present in the BSP driver which is where these values
* come from. Name GRF_VO_CON3 is assumed.
*/
#define RK3568_GRF_VO_CON3 0x36c
#define RK3568_DSI1_SKEWCALHS (0x1f << 11)
#define RK3568_DSI1_FORCETXSTOPMODE (0xf << 4)
#define RK3568_DSI1_TURNDISABLE BIT(2)
#define RK3568_DSI1_FORCERXMODE BIT(0)
#define HIWORD_UPDATE(val, mask) (val | (mask) << 16)
/* Timeout for regulator on/off, pll lock/unlock & fifo empty */
#define TIMEOUT_US 200000
enum {
BANDGAP_97_07,
BANDGAP_98_05,
BANDGAP_99_02,
BANDGAP_100_00,
BANDGAP_93_17,
BANDGAP_94_15,
BANDGAP_95_12,
BANDGAP_96_10,
};
enum {
BIASEXTR_87_1,
BIASEXTR_91_5,
BIASEXTR_95_9,
BIASEXTR_100,
BIASEXTR_105_94,
BIASEXTR_111_88,
BIASEXTR_118_8,
BIASEXTR_127_7,
};
struct rockchip_dw_dsi_chip_data {
u32 reg;
u32 lcdsel_grf_reg;
u32 lcdsel_big;
u32 lcdsel_lit;
u32 enable_grf_reg;
u32 enable;
u32 lanecfg1_grf_reg;
u32 lanecfg1;
u32 lanecfg2_grf_reg;
u32 lanecfg2;
unsigned int flags;
unsigned int max_data_lanes;
};
struct dw_rockchip_dsi_priv {
struct mipi_dsi_device device;
void __iomem *base;
struct udevice *panel;
/* Optional external dphy */
struct phy phy;
struct phy_configure_opts_mipi_dphy phy_opts;
struct clk *pclk;
struct clk *ref;
struct reset_ctl *rst;
unsigned int lane_mbps; /* per lane */
u16 input_div;
u16 feedback_div;
const struct rockchip_dw_dsi_chip_data *cdata;
struct udevice *dsi_host;
};
static inline void dsi_write(struct dw_rockchip_dsi_priv *dsi, u32 reg, u32 val)
{
writel(val, dsi->base + reg);
}
static inline u32 dsi_read(struct dw_rockchip_dsi_priv *dsi, u32 reg)
{
return readl(dsi->base + reg);
}
static inline void dsi_set(struct dw_rockchip_dsi_priv *dsi, u32 reg, u32 mask)
{
dsi_write(dsi, reg, dsi_read(dsi, reg) | mask);
}
static inline void dsi_clear(struct dw_rockchip_dsi_priv *dsi, u32 reg, u32 mask)
{
dsi_write(dsi, reg, dsi_read(dsi, reg) & ~mask);
}
static inline void dsi_update_bits(struct dw_rockchip_dsi_priv *dsi, u32 reg,
u32 mask, u32 val)
{
dsi_write(dsi, reg, (dsi_read(dsi, reg) & ~mask) | val);
}
static void dw_mipi_dsi_phy_write(struct dw_rockchip_dsi_priv *dsi,
u8 test_code,
u8 test_data)
{
/*
* With the falling edge on TESTCLK, the TESTDIN[7:0] signal content
* is latched internally as the current test code. Test data is
* programmed internally by rising edge on TESTCLK.
*/
dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_TESTEN | PHY_TESTDOUT(0) |
PHY_TESTDIN(test_code));
dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_UNTESTCLK | PHY_UNTESTCLR);
dsi_write(dsi, DSI_PHY_TST_CTRL1, PHY_UNTESTEN | PHY_TESTDOUT(0) |
PHY_TESTDIN(test_data));
dsi_write(dsi, DSI_PHY_TST_CTRL0, PHY_TESTCLK | PHY_UNTESTCLR);
}
struct dphy_pll_parameter_map {
unsigned int max_mbps;
u8 hsfreqrange;
u8 icpctrl;
u8 lpfctrl;
};
/* The table is based on 27MHz DPHY pll reference clock. */
static const struct dphy_pll_parameter_map dppa_map[] = {
{ 89, 0x00, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
{ 99, 0x10, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
{ 109, 0x20, CP_CURRENT_3UA, LPF_RESISTORS_13KOHM },
{ 129, 0x01, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
{ 139, 0x11, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
{ 149, 0x21, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
{ 169, 0x02, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
{ 179, 0x12, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
{ 199, 0x22, CP_CURRENT_6UA, LPF_RESISTORS_13KOHM },
{ 219, 0x03, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
{ 239, 0x13, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
{ 249, 0x23, CP_CURRENT_4_5UA, LPF_RESISTORS_13KOHM },
{ 269, 0x04, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
{ 299, 0x14, CP_CURRENT_6UA, LPF_RESISTORS_11_5KOHM },
{ 329, 0x05, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
{ 359, 0x15, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
{ 399, 0x25, CP_CURRENT_3UA, LPF_RESISTORS_15_5KOHM },
{ 449, 0x06, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 499, 0x16, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 549, 0x07, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
{ 599, 0x17, CP_CURRENT_7_5UA, LPF_RESISTORS_10_5KOHM },
{ 649, 0x08, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 699, 0x18, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 749, 0x09, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 799, 0x19, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 849, 0x29, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 899, 0x39, CP_CURRENT_7_5UA, LPF_RESISTORS_11_5KOHM },
{ 949, 0x0a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
{ 999, 0x1a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
{1049, 0x2a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
{1099, 0x3a, CP_CURRENT_12UA, LPF_RESISTORS_8KOHM },
{1149, 0x0b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1199, 0x1b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1249, 0x2b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1299, 0x3b, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1349, 0x0c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1399, 0x1c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1449, 0x2c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM },
{1500, 0x3c, CP_CURRENT_12UA, LPF_RESISTORS_10_5KOHM }
};
static int max_mbps_to_parameter(unsigned int max_mbps)
{
int i;
for (i = 0; i < ARRAY_SIZE(dppa_map); i++)
if (dppa_map[i].max_mbps >= max_mbps)
return i;
return -EINVAL;
}
/*
* ns2bc - Nanoseconds to byte clock cycles
*/
static inline unsigned int ns2bc(struct dw_rockchip_dsi_priv *dsi, int ns)
{
return DIV_ROUND_UP(ns * dsi->lane_mbps / 8, 1000);
}
/*
* ns2ui - Nanoseconds to UI time periods
*/
static inline unsigned int ns2ui(struct dw_rockchip_dsi_priv *dsi, int ns)
{
return DIV_ROUND_UP(ns * dsi->lane_mbps, 1000);
}
static int dsi_phy_init(void *priv_data)
{
struct mipi_dsi_device *device = priv_data;
struct udevice *dev = device->dev;
struct dw_rockchip_dsi_priv *dsi = dev_get_priv(dev);
int ret, i, vco;
if (&dsi->phy) {
ret = generic_phy_configure(&dsi->phy, &dsi->phy_opts);
if (ret) {
dev_err(dsi->dsi_host,
"Configure external dphy fail %d\n",
ret);
return ret;
}
ret = generic_phy_power_on(&dsi->phy);
if (ret) {
dev_err(dsi->dsi_host,
"Generic phy power on fail %d\n", ret);
return ret;
}
return 0;
}
/*
* Get vco from frequency(lane_mbps)
* vco frequency table
* 000 - between 80 and 200 MHz
* 001 - between 200 and 300 MHz
* 010 - between 300 and 500 MHz
* 011 - between 500 and 700 MHz
* 100 - between 700 and 900 MHz
* 101 - between 900 and 1100 MHz
* 110 - between 1100 and 1300 MHz
* 111 - between 1300 and 1500 MHz
*/
vco = (dsi->lane_mbps < 200) ? 0 : (dsi->lane_mbps + 100) / 200;
i = max_mbps_to_parameter(dsi->lane_mbps);
if (i < 0) {
dev_err(dsi->dsi_host,
"failed to get parameter for %dmbps clock\n",
dsi->lane_mbps);
return i;
}
dw_mipi_dsi_phy_write(dsi, PLL_BIAS_CUR_SEL_CAP_VCO_CONTROL,
BYPASS_VCO_RANGE |
VCO_RANGE_CON_SEL(vco) |
VCO_IN_CAP_CON_LOW |
REF_BIAS_CUR_SEL);
dw_mipi_dsi_phy_write(dsi, PLL_CP_CONTROL_PLL_LOCK_BYPASS,
CP_CURRENT_SEL(dppa_map[i].icpctrl));
dw_mipi_dsi_phy_write(dsi, PLL_LPF_AND_CP_CONTROL,
CP_PROGRAM_EN | LPF_PROGRAM_EN |
LPF_RESISTORS_SEL(dppa_map[i].lpfctrl));
dw_mipi_dsi_phy_write(dsi, HS_RX_CONTROL_OF_LANE_0,
HSFREQRANGE_SEL(dppa_map[i].hsfreqrange));
dw_mipi_dsi_phy_write(dsi, PLL_INPUT_DIVIDER_RATIO,
INPUT_DIVIDER(dsi->input_div));
dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
LOOP_DIV_LOW_SEL(dsi->feedback_div) |
LOW_PROGRAM_EN);
/*
* We need set PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL immediately
* to make the configured LSB effective according to IP simulation
* and lab test results.
* Only in this way can we get correct mipi phy pll frequency.
*/
dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
dw_mipi_dsi_phy_write(dsi, PLL_LOOP_DIVIDER_RATIO,
LOOP_DIV_HIGH_SEL(dsi->feedback_div) |
HIGH_PROGRAM_EN);
dw_mipi_dsi_phy_write(dsi, PLL_INPUT_AND_LOOP_DIVIDER_RATIOS_CONTROL,
PLL_LOOP_DIV_EN | PLL_INPUT_DIV_EN);
dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
LOW_PROGRAM_EN | BIASEXTR_SEL(BIASEXTR_127_7));
dw_mipi_dsi_phy_write(dsi, AFE_BIAS_BANDGAP_ANALOG_PROGRAMMABILITY,
HIGH_PROGRAM_EN | BANDGAP_SEL(BANDGAP_96_10));
dw_mipi_dsi_phy_write(dsi, BANDGAP_AND_BIAS_CONTROL,
POWER_CONTROL | INTERNAL_REG_CURRENT |
BIAS_BLOCK_ON | BANDGAP_ON);
dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
TER_RESISTOR_LOW | TER_CAL_DONE |
SETRD_MAX | TER_RESISTORS_ON);
dw_mipi_dsi_phy_write(dsi, TERMINATION_RESISTER_CONTROL,
TER_RESISTOR_HIGH | LEVEL_SHIFTERS_ON |
SETRD_MAX | POWER_MANAGE |
TER_RESISTORS_ON);
dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_REQUEST_STATE_TIME_CONTROL,
TLP_PROGRAM_EN | ns2bc(dsi, 500));
dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_PREPARE_STATE_TIME_CONTROL,
THS_PRE_PROGRAM_EN | ns2ui(dsi, 40));
dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_HS_ZERO_STATE_TIME_CONTROL,
THS_ZERO_PROGRAM_EN | ns2bc(dsi, 300));
dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_TRAIL_STATE_TIME_CONTROL,
THS_PRE_PROGRAM_EN | ns2ui(dsi, 100));
dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_EXIT_STATE_TIME_CONTROL,
BIT(5) | ns2bc(dsi, 100));
dw_mipi_dsi_phy_write(dsi, HS_TX_CLOCK_LANE_POST_TIME_CONTROL,
BIT(5) | (ns2bc(dsi, 60) + 7));
dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_REQUEST_STATE_TIME_CONTROL,
TLP_PROGRAM_EN | ns2bc(dsi, 500));
dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_PREPARE_STATE_TIME_CONTROL,
THS_PRE_PROGRAM_EN | (ns2ui(dsi, 50) + 20));
dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_HS_ZERO_STATE_TIME_CONTROL,
THS_ZERO_PROGRAM_EN | (ns2bc(dsi, 140) + 2));
dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_TRAIL_STATE_TIME_CONTROL,
THS_PRE_PROGRAM_EN | (ns2ui(dsi, 60) + 8));
dw_mipi_dsi_phy_write(dsi, HS_TX_DATA_LANE_EXIT_STATE_TIME_CONTROL,
BIT(5) | ns2bc(dsi, 100));
return ret;
}
static void dsi_phy_post_set_mode(void *priv_data, unsigned long mode_flags)
{
struct mipi_dsi_device *device = priv_data;
struct udevice *dev = device->dev;
struct dw_rockchip_dsi_priv *dsi = dev_get_priv(dev);
dev_dbg(dev, "Set mode %p enable %ld\n", dsi,
mode_flags & MIPI_DSI_MODE_VIDEO);
if (!dsi)
return;
/*
* DSI wrapper must be enabled in video mode & disabled in command mode.
* If wrapper is enabled in command mode, the display controller
* register access will hang. Note that this was carried over from the
* stm32 dsi driver and is unknown if necessary for Rockchip.
*/
if (mode_flags & MIPI_DSI_MODE_VIDEO)
dsi_set(dsi, DSI_WCR, WCR_DSIEN);
else
dsi_clear(dsi, DSI_WCR, WCR_DSIEN);
}
static int
dw_mipi_dsi_get_lane_mbps(void *priv_data, struct display_timing *timings,
u32 lanes, u32 format, unsigned int *lane_mbps)
{
struct mipi_dsi_device *device = priv_data;
struct udevice *dev = device->dev;
struct dw_rockchip_dsi_priv *dsi = dev_get_priv(dev);
int bpp;
unsigned long mpclk, tmp;
unsigned int target_mbps = 1000;
unsigned int max_mbps = dppa_map[ARRAY_SIZE(dppa_map) - 1].max_mbps;
unsigned long best_freq = 0;
unsigned long fvco_min, fvco_max, fin, fout;
unsigned int min_prediv, max_prediv;
unsigned int _prediv, best_prediv;
unsigned long _fbdiv, best_fbdiv;
unsigned long min_delta = ULONG_MAX;
unsigned int pllref_clk;
bpp = mipi_dsi_pixel_format_to_bpp(format);
if (bpp < 0) {
dev_err(dsi->dsi_host,
"failed to get bpp for pixel format %d\n",
format);
return bpp;
}
mpclk = DIV_ROUND_UP(timings->pixelclock.typ, 1000);
if (mpclk) {
/* take 1 / 0.8, since mbps must big than bandwidth of RGB */
tmp = (mpclk * (bpp / lanes) * 10 / 8) / 1000;
if (tmp < max_mbps)
target_mbps = tmp;
else
dev_err(dsi->dsi_host,
"DPHY clock frequency is out of range\n");
}
/* for external phy only the mipi_dphy_config is necessary */
if (&dsi->phy) {
phy_mipi_dphy_get_default_config(timings->pixelclock.typ * 10 / 8,
bpp, lanes,
&dsi->phy_opts);
dsi->lane_mbps = target_mbps;
*lane_mbps = dsi->lane_mbps;
return 0;
}
pllref_clk = clk_get_rate(dsi->ref);
fout = target_mbps * USEC_PER_SEC;
/* constraint: 5Mhz <= Fref / N <= 40MHz */
min_prediv = DIV_ROUND_UP(fin, 40 * USEC_PER_SEC);
max_prediv = fin / (5 * USEC_PER_SEC);
/* constraint: 80MHz <= Fvco <= 1500Mhz */
fvco_min = 80 * USEC_PER_SEC;
fvco_max = 1500 * USEC_PER_SEC;
for (_prediv = min_prediv; _prediv <= max_prediv; _prediv++) {
u64 tmp;
u32 delta;
/* Fvco = Fref * M / N */
tmp = (u64)fout * _prediv;
do_div(tmp, fin);
_fbdiv = tmp;
/*
* Due to the use of a "by 2 pre-scaler," the range of the
* feedback multiplication value M is limited to even division
* numbers, and m must be greater than 6, not bigger than 512.
*/
if (_fbdiv < 6 || _fbdiv > 512)
continue;
_fbdiv += _fbdiv % 2;
tmp = (u64)_fbdiv * fin;
do_div(tmp, _prediv);
if (tmp < fvco_min || tmp > fvco_max)
continue;
delta = abs(fout - tmp);
if (delta < min_delta) {
best_prediv = _prediv;
best_fbdiv = _fbdiv;
min_delta = delta;
best_freq = tmp;
}
}
if (best_freq) {
dsi->lane_mbps = DIV_ROUND_UP(best_freq, USEC_PER_SEC);
*lane_mbps = dsi->lane_mbps;
dsi->input_div = best_prediv;
dsi->feedback_div = best_fbdiv;
} else {
dev_err(dsi->dsi_host, "Can not find best_freq for DPHY\n");
return -EINVAL;
}
return 0;
}
struct hstt {
unsigned int maxfreq;
struct mipi_dsi_phy_timing timing;
};
#define HSTT(_maxfreq, _c_lp2hs, _c_hs2lp, _d_lp2hs, _d_hs2lp) \
{ \
.maxfreq = _maxfreq, \
.timing = { \
.clk_lp2hs = _c_lp2hs, \
.clk_hs2lp = _c_hs2lp, \
.data_lp2hs = _d_lp2hs, \
.data_hs2lp = _d_hs2lp, \
} \
}
/*
* Table A-3 High-Speed Transition Times
* (Note spacing is deliberate for readability).
*/
static struct hstt hstt_table[] = {
HSTT( 90, 32, 20, 26, 13),
HSTT( 100, 35, 23, 28, 14),
HSTT( 110, 32, 22, 26, 13),
HSTT( 130, 31, 20, 27, 13),
HSTT( 140, 33, 22, 26, 14),
HSTT( 150, 33, 21, 26, 14),
HSTT( 170, 32, 20, 27, 13),
HSTT( 180, 36, 23, 30, 15),
HSTT( 200, 40, 22, 33, 15),
HSTT( 220, 40, 22, 33, 15),
HSTT( 240, 44, 24, 36, 16),
HSTT( 250, 48, 24, 38, 17),
HSTT( 270, 48, 24, 38, 17),
HSTT( 300, 50, 27, 41, 18),
HSTT( 330, 56, 28, 45, 18),
HSTT( 360, 59, 28, 48, 19),
HSTT( 400, 61, 30, 50, 20),
HSTT( 450, 67, 31, 55, 21),
HSTT( 500, 73, 31, 59, 22),
HSTT( 550, 79, 36, 63, 24),
HSTT( 600, 83, 37, 68, 25),
HSTT( 650, 90, 38, 73, 27),
HSTT( 700, 95, 40, 77, 28),
HSTT( 750, 102, 40, 84, 28),
HSTT( 800, 106, 42, 87, 30),
HSTT( 850, 113, 44, 93, 31),
HSTT( 900, 118, 47, 98, 32),
HSTT( 950, 124, 47, 102, 34),
HSTT(1000, 130, 49, 107, 35),
HSTT(1050, 135, 51, 111, 37),
HSTT(1100, 139, 51, 114, 38),
HSTT(1150, 146, 54, 120, 40),
HSTT(1200, 153, 57, 125, 41),
HSTT(1250, 158, 58, 130, 42),
HSTT(1300, 163, 58, 135, 44),
HSTT(1350, 168, 60, 140, 45),
HSTT(1400, 172, 64, 144, 47),
HSTT(1450, 176, 65, 148, 48),
HSTT(1500, 181, 66, 153, 50)
};
static int dw_mipi_dsi_rockchip_get_timing(void *priv_data,
unsigned int lane_mbps,
struct mipi_dsi_phy_timing *timing)
{
int i;
for (i = 0; i < ARRAY_SIZE(hstt_table); i++)
if (lane_mbps < hstt_table[i].maxfreq)
break;
if (i == ARRAY_SIZE(hstt_table))
i--;
*timing = hstt_table[i].timing;
return 0;
}
static const struct mipi_dsi_phy_ops dsi_rockchip_phy_ops = {
.init = dsi_phy_init,
.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
.get_timing = dw_mipi_dsi_rockchip_get_timing,
.post_set_mode = dsi_phy_post_set_mode,
};
static int dw_mipi_dsi_rockchip_attach(struct udevice *dev)
{
struct dw_rockchip_dsi_priv *priv = dev_get_priv(dev);
struct mipi_dsi_device *device = &priv->device;
struct mipi_dsi_panel_plat *mplat;
struct display_timing timings;
int ret;
ret = uclass_first_device_err(UCLASS_PANEL, &priv->panel);
if (ret) {
dev_err(dev, "panel device error %d\n", ret);
return ret;
}
mplat = dev_get_plat(priv->panel);
mplat->device = &priv->device;
device->lanes = mplat->lanes;
device->format = mplat->format;
device->mode_flags = mplat->mode_flags;
ret = panel_get_display_timing(priv->panel, &timings);
if (ret) {
ret = ofnode_decode_display_timing(dev_ofnode(priv->panel),
0, &timings);
if (ret) {
dev_err(dev, "decode display timing error %d\n", ret);
return ret;
}
}
ret = uclass_get_device(UCLASS_DSI_HOST, 0, &priv->dsi_host);
if (ret) {
dev_err(dev, "No video dsi host detected %d\n", ret);
return ret;
}
ret = dsi_host_init(priv->dsi_host, device, &timings, 4,
&dsi_rockchip_phy_ops);
if (ret) {
dev_err(dev, "failed to initialize mipi dsi host\n");
return ret;
}
return 0;
}
static int dw_mipi_dsi_rockchip_set_bl(struct udevice *dev, int percent)
{
struct dw_rockchip_dsi_priv *priv = dev_get_priv(dev);
int ret;
/*
* Allow backlight to be optional, since this driver may be
* used to simply detect a panel rather than bring one up.
*/
ret = panel_enable_backlight(priv->panel);
if ((ret) && (ret != -ENOSYS)) {
dev_err(dev, "panel %s enable backlight error %d\n",
priv->panel->name, ret);
return ret;
}
ret = dsi_host_enable(priv->dsi_host);
if (ret) {
dev_err(dev, "failed to enable mipi dsi host\n");
return ret;
}
return 0;
}
static void dw_mipi_dsi_rockchip_config(struct dw_rockchip_dsi_priv *dsi)
{
if (dsi->cdata->lanecfg1_grf_reg)
dsi_write(dsi, dsi->cdata->lanecfg1_grf_reg,
dsi->cdata->lanecfg1);
if (dsi->cdata->lanecfg2_grf_reg)
dsi_write(dsi, dsi->cdata->lanecfg2_grf_reg,
dsi->cdata->lanecfg2);
if (dsi->cdata->enable_grf_reg)
dsi_write(dsi, dsi->cdata->enable_grf_reg,
dsi->cdata->enable);
}
static int dw_mipi_dsi_rockchip_bind(struct udevice *dev)
{
int ret;
ret = device_bind_driver_to_node(dev, "dw_mipi_dsi", "dsihost",
dev_ofnode(dev), NULL);
if (ret) {
dev_err(dev, "failed to bind driver to node\n");
return ret;
}
return dm_scan_fdt_dev(dev);
}
static int dw_mipi_dsi_rockchip_probe(struct udevice *dev)
{
struct dw_rockchip_dsi_priv *priv = dev_get_priv(dev);
struct mipi_dsi_device *device = &priv->device;
int ret, i;
const struct rockchip_dw_dsi_chip_data *cdata =
(const struct rockchip_dw_dsi_chip_data *)dev_get_driver_data(dev);
device->dev = dev;
priv->base = (void *)dev_read_addr(dev);
if ((fdt_addr_t)priv->base == FDT_ADDR_T_NONE) {
dev_err(dev, "dsi dt register address error\n");
return -EINVAL;
}
i = 0;
while (cdata[i].reg) {
if (cdata[i].reg == (fdt_addr_t)priv->base) {
priv->cdata = &cdata[i];
break;
}
i++;
}
if (!priv->cdata) {
dev_err(dev, "no dsi-config for %s node\n", dev->name);
return -EINVAL;
}
/*
* Get an optional external dphy. The external dphy stays as
* NULL if it's not initialized.
*/
ret = generic_phy_get_by_name(dev, "dphy", &priv->phy);
if ((ret) && (ret != -ENODEV)) {
dev_err(dev, "failed to get mipi dphy: %d\n", ret);
return -EINVAL;
}
priv->pclk = devm_clk_get(dev, "pclk");
if (IS_ERR(priv->pclk)) {
dev_err(dev, "peripheral clock get error %d\n", ret);
return ret;
}
/* Get a ref clock only if not using an external phy. */
if (&priv->phy) {
dev_dbg(dev, "setting priv->ref to NULL\n");
priv->ref = NULL;
} else {
priv->ref = devm_clk_get(dev, "ref");
if (ret) {
dev_err(dev, "pll reference clock get error %d\n", ret);
return ret;
}
}
priv->rst = devm_reset_control_get_by_index(device->dev, 0);
if (IS_ERR(priv->rst)) {
dev_err(dev, "missing dsi hardware reset\n");
return ret;
}
/* Reset */
reset_deassert(priv->rst);
dw_mipi_dsi_rockchip_config(priv);
return 0;
}
struct video_bridge_ops dw_mipi_dsi_rockchip_ops = {
.attach = dw_mipi_dsi_rockchip_attach,
.set_backlight = dw_mipi_dsi_rockchip_set_bl,
};
static const struct rockchip_dw_dsi_chip_data rk3568_chip_data[] = {
{
.reg = 0xfe060000,
.lanecfg1_grf_reg = RK3568_GRF_VO_CON2,
.lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI0_SKEWCALHS |
RK3568_DSI0_FORCETXSTOPMODE |
RK3568_DSI0_TURNDISABLE |
RK3568_DSI0_FORCERXMODE),
.max_data_lanes = 4,
},
{
.reg = 0xfe070000,
.lanecfg1_grf_reg = RK3568_GRF_VO_CON3,
.lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI1_SKEWCALHS |
RK3568_DSI1_FORCETXSTOPMODE |
RK3568_DSI1_TURNDISABLE |
RK3568_DSI1_FORCERXMODE),
.max_data_lanes = 4,
},
{ /* sentinel */ }
};
static const struct udevice_id dw_mipi_dsi_rockchip_dt_ids[] = {
{ .compatible = "rockchip,rk3568-mipi-dsi",
.data = (long)&rk3568_chip_data,
},
{ /* sentinel */ }
};
U_BOOT_DRIVER(dw_mipi_dsi_rockchip) = {
.name = "dw-mipi-dsi-rockchip",
.id = UCLASS_VIDEO_BRIDGE,
.of_match = dw_mipi_dsi_rockchip_dt_ids,
.bind = dw_mipi_dsi_rockchip_bind,
.probe = dw_mipi_dsi_rockchip_probe,
.ops = &dw_mipi_dsi_rockchip_ops,
.priv_auto = sizeof(struct dw_rockchip_dsi_priv),
};
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