// SPDX-License-Identifier: GPL-2.0-only
/*
* Novatek NT35510 panel driver
* Copyright ( C ) 2020 Linus Walleij < linus . walleij @ linaro . org >
* Based on code by Robert Teather ( C ) 2012 Samsung
*
* This display driver ( and I refer to the physical component NT35510 ,
* not this Linux kernel software driver ) can handle :
* 480 x864 , 480 x854 , 480 x800 , 480 x720 and 480 x640 pixel displays .
* It has 480 x840x24bit SRAM embedded for storing a frame .
* When powered on the display is by default in 480 x800 mode .
*
* The actual panels using this component have different names , but
* the code needed to set up and configure the panel will be similar ,
* so they should all use the NT35510 driver with appropriate configuration
* per - panel , e . g . for physical size .
*
* This driver is for the DSI interface to panels using the NT35510 .
*
* The NT35510 can also use an RGB ( DPI ) interface combined with an
* I2C or SPI interface for setting up the NT35510 . If this is needed
* this panel driver should be refactored to also support that use
* case .
*/
#include <linux/backlight.h>
#include <linux/bitops.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <video/mipi_display.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#define NT35510_CMD_CORRECT_GAMMA BIT(0 )
#define NT35510_CMD_CONTROL_DISPLAY BIT(1 )
#define NT35510_CMD_SETVCMOFF BIT(2 )
#define MCS_CMD_MAUCCTR 0 xF0 /* Manufacturer command enable */
#define MCS_CMD_READ_ID1 0 xDA
#define MCS_CMD_READ_ID2 0 xDB
#define MCS_CMD_READ_ID3 0 xDC
#define MCS_CMD_MTP_READ_SETTING 0 xF8 /* Uncertain about name */
#define MCS_CMD_MTP_READ_PARAM 0 xFF /* Uncertain about name */
/*
* These manufacturer commands are available after we enable manufacturer
* command set ( MCS ) for page 0 .
*/
#define NT35510_P0_DOPCTR 0 xB1
#define NT35510_P0_SDHDTCTR 0 xB6
#define NT35510_P0_GSEQCTR 0 xB7
#define NT35510_P0_SDEQCTR 0 xB8
#define NT35510_P0_SDVPCTR 0 xBA
#define NT35510_P0_DPFRCTR1 0 xBD
#define NT35510_P0_DPFRCTR2 0 xBE
#define NT35510_P0_DPFRCTR3 0 xBF
#define NT35510_P0_DPMCTR12 0 xCC
#define NT35510_P0_DOPCTR_LEN 2
#define NT35510_P0_GSEQCTR_LEN 2
#define NT35510_P0_SDEQCTR_LEN 4
#define NT35510_P0_SDVPCTR_LEN 1
#define NT35510_P0_DPFRCTR1_LEN 5
#define NT35510_P0_DPFRCTR2_LEN 5
#define NT35510_P0_DPFRCTR3_LEN 5
#define NT35510_P0_DPMCTR12_LEN 3
#define NT35510_DOPCTR_0_RAMKP BIT(7 ) /* Contents kept in sleep */
#define NT35510_DOPCTR_0_DSITE BIT(6 ) /* Enable TE signal */
#define NT35510_DOPCTR_0_DSIG BIT(5 ) /* Enable generic read/write */
#define NT35510_DOPCTR_0_DSIM BIT(4 ) /* Enable video mode on DSI */
#define NT35510_DOPCTR_0_EOTP BIT(3 ) /* Support EoTP */
#define NT35510_DOPCTR_0_N565 BIT(2 ) /* RGB or BGR pixel format */
#define NT35510_DOPCTR_1_TW_PWR_SEL BIT(4 ) /* TE power selector */
#define NT35510_DOPCTR_1_CRGB BIT(3 ) /* RGB or BGR byte order */
#define NT35510_DOPCTR_1_CTB BIT(2 ) /* Vertical scanning direction */
#define NT35510_DOPCTR_1_CRL BIT(1 ) /* Source driver data shift */
#define NT35510_P0_SDVPCTR_PRG BIT(2 ) /* 0 = normal operation, 1 = VGLO */
#define NT35510_P0_SDVPCTR_AVDD 0 /* source driver output = AVDD */
#define NT35510_P0_SDVPCTR_OFFCOL 1 /* source driver output = off color */
#define NT35510_P0_SDVPCTR_AVSS 2 /* source driver output = AVSS */
#define NT35510_P0_SDVPCTR_HI_Z 3 /* source driver output = High impedance */
/*
* These manufacturer commands are available after we enable manufacturer
* command set ( MCS ) for page 1 .
*/
#define NT35510_P1_SETAVDD 0 xB0
#define NT35510_P1_SETAVEE 0 xB1
#define NT35510_P1_SETVCL 0 xB2
#define NT35510_P1_SETVGH 0 xB3
#define NT35510_P1_SETVRGH 0 xB4
#define NT35510_P1_SETVGL 0 xB5
#define NT35510_P1_BT1CTR 0 xB6
#define NT35510_P1_BT2CTR 0 xB7
#define NT35510_P1_BT3CTR 0 xB8
#define NT35510_P1_BT4CTR 0 xB9 /* VGH boosting times/freq */
#define NT35510_P1_BT5CTR 0 xBA
#define NT35510_P1_PFMCTR 0 xBB
#define NT35510_P1_SETVGP 0 xBC
#define NT35510_P1_SETVGN 0 xBD
#define NT35510_P1_SETVCMOFF 0 xBE
#define NT35510_P1_VGHCTR 0 xBF /* VGH output ctrl */
#define NT35510_P1_SET_GAMMA_RED_POS 0 xD1
#define NT35510_P1_SET_GAMMA_GREEN_POS 0 xD2
#define NT35510_P1_SET_GAMMA_BLUE_POS 0 xD3
#define NT35510_P1_SET_GAMMA_RED_NEG 0 xD4
#define NT35510_P1_SET_GAMMA_GREEN_NEG 0 xD5
#define NT35510_P1_SET_GAMMA_BLUE_NEG 0 xD6
/* AVDD and AVEE setting 3 bytes */
#define NT35510_P1_AVDD_LEN 3
#define NT35510_P1_AVEE_LEN 3
#define NT35510_P1_VCL_LEN 3
#define NT35510_P1_VGH_LEN 3
#define NT35510_P1_VGL_LEN 3
#define NT35510_P1_VGP_LEN 3
#define NT35510_P1_VGN_LEN 3
#define NT35510_P1_VCMOFF_LEN 2
/* BT1CTR thru BT5CTR setting 3 bytes */
#define NT35510_P1_BT1CTR_LEN 3
#define NT35510_P1_BT2CTR_LEN 3
#define NT35510_P1_BT3CTR_LEN 3
#define NT35510_P1_BT4CTR_LEN 3
#define NT35510_P1_BT5CTR_LEN 3
/* 52 gamma parameters times two per color: positive and negative */
#define NT35510_P1_GAMMA_LEN 52
#define NT35510_WRCTRLD_BCTRL BIT(5 )
#define NT35510_WRCTRLD_A BIT(4 )
#define NT35510_WRCTRLD_DD BIT(3 )
#define NT35510_WRCTRLD_BL BIT(2 )
#define NT35510_WRCTRLD_DB BIT(1 )
#define NT35510_WRCTRLD_G BIT(0 )
#define NT35510_WRCABC_OFF 0
#define NT35510_WRCABC_UI_MODE 1
#define NT35510_WRCABC_STILL_MODE 2
#define NT35510_WRCABC_MOVING_MODE 3
/**
* struct nt35510_config - the display - specific NT35510 configuration
*
* Some of the settings provide an array of bytes , A , B C which mean :
* A = normal / idle off mode
* B = idle on mode
* C = partial / idle off mode
*
* Gamma correction arrays are 10 bit numbers , two consecutive bytes
* makes out one point on the gamma correction curve . The points are
* not linearly placed along the X axis , we get points 0 , 1 , 3 , 5
* 7 , 11 , 15 , 23 , 31 , 47 , 63 , 95 , 127 , 128 , 160 , 192 , 208 , 224 , 232 ,
* 240 , 244 , 248 , 250 , 252 , 254 , 255 . The voltages tuples form
* V0 , V1 , V3 . . . V255 , with 0 x0000 being the lowest voltage and
* 0 x03FF being the highest voltage .
*
* Each value must be strictly higher than the previous value forming
* a rising curve like this :
*
* ^
* | V255
* | V254
* | . . . .
* | V5
* | V3
* | V1
* | V0
* + - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - >
*
* The details about all settings can be found in the NT35510 Application
* Note .
*/
struct nt35510_config {
/**
* @ width_mm : physical panel width [ mm ]
*/
u32 width_mm;
/**
* @ height_mm : physical panel height [ mm ]
*/
u32 height_mm;
/**
* @ mode : the display mode . This is only relevant outside the panel
* in video mode : in command mode this is configuring the internal
* timing in the display controller .
*/
const struct drm_display_mode mode;
/**
* @ mode_flags : DSI operation mode related flags
*/
unsigned long mode_flags;
/**
* @ cmds : enable DSI commands
*/
u32 cmds;
/**
* @ avdd : setting for AVDD ranging from 0 x00 = 6 . 5 V to 0 x14 = 4 . 5 V
* in 0 . 1 V steps the default is 0 x05 which means 6 . 0 V
*/
u8 avdd[NT35510_P1_AVDD_LEN];
/**
* @ bt1ctr : setting for boost power control for the AVDD step - up
* circuit ( 1 )
* bits 0 . . 2 in the lower nibble controls PCK , the booster clock
* frequency for the step - up circuit :
* 0 = Hsync / 32
* 1 = Hsync / 16
* 2 = Hsync / 8
* 3 = Hsync / 4
* 4 = Hsync / 2
* 5 = Hsync
* 6 = Hsync x 2
* 7 = Hsync x 4
* bits 4 . . 6 in the upper nibble controls BTP , the boosting
* amplification for the step - up circuit :
* 0 = Disable
* 1 = 1 . 5 x VDDB
* 2 = 1 . 66 x VDDB
* 3 = 2 x VDDB
* 4 = 2 . 5 x VDDB
* 5 = 3 x VDDB
* The defaults are 4 and 4 yielding 0 x44
*/
u8 bt1ctr[NT35510_P1_BT1CTR_LEN];
/**
* @ avee : setting for AVEE ranging from 0 x00 = - 6 . 5 V to 0 x14 = - 4 . 5 V
* in 0 . 1 V steps the default is 0 x05 which means - 6 . 0 V
*/
u8 avee[NT35510_P1_AVEE_LEN];
/**
* @ bt2ctr : setting for boost power control for the AVEE step - up
* circuit ( 2 )
* bits 0 . . 2 in the lower nibble controls NCK , the booster clock
* frequency , the values are the same as for PCK in @ bt1ctr .
* bits 4 . . 5 in the upper nibble controls BTN , the boosting
* amplification for the step - up circuit .
* 0 = Disable
* 1 = - 1 . 5 x VDDB
* 2 = - 2 x VDDB
* 3 = - 2 . 5 x VDDB
* 4 = - 3 x VDDB
* The defaults are 4 and 3 yielding 0 x34
*/
u8 bt2ctr[NT35510_P1_BT2CTR_LEN];
/**
* @ vcl : setting for VCL ranging from 0 x00 = - 2 . 5 V to 0 x11 = - 4 . 0 V
* in 1 V steps , the default is 0 x00 which means - 2 . 5 V
*/
u8 vcl[NT35510_P1_VCL_LEN];
/**
* @ bt3ctr : setting for boost power control for the VCL step - up
* circuit ( 3 )
* bits 0 . . 2 in the lower nibble controls CLCK , the booster clock
* frequency , the values are the same as for PCK in @ bt1ctr .
* bits 4 . . 5 in the upper nibble controls BTCL , the boosting
* amplification for the step - up circuit .
* 0 = Disable
* 1 = - 0 . 5 x VDDB
* 2 = - 1 x VDDB
* 3 = - 2 x VDDB
* The defaults are 4 and 2 yielding 0 x24
*/
u8 bt3ctr[NT35510_P1_BT3CTR_LEN];
/**
* @ vgh : setting for VGH ranging from 0 x00 = 7 . 0 V to 0 x0B = 18 . 0 V
* in 1 V steps , the default is 0 x08 which means 15 V
*/
u8 vgh[NT35510_P1_VGH_LEN];
/**
* @ bt4ctr : setting for boost power control for the VGH step - up
* circuit ( 4 )
* bits 0 . . 2 in the lower nibble controls HCK , the booster clock
* frequency , the values are the same as for PCK in @ bt1ctr .
* bits 4 . . 5 in the upper nibble controls BTH , the boosting
* amplification for the step - up circuit .
* 0 = AVDD + VDDB
* 1 = AVDD - AVEE
* 2 = AVDD - AVEE + VDDB
* 3 = AVDD x 2 - AVEE
* The defaults are 4 and 3 yielding 0 x34
*/
u8 bt4ctr[NT35510_P1_BT4CTR_LEN];
/**
* @ vgl : setting for VGL ranging from 0 x00 = - 2 V to 0 x0f = - 15 V in
* 1 V steps , the default is 0 x08 which means - 10 V
*/
u8 vgl[NT35510_P1_VGL_LEN];
/**
* @ bt5ctr : setting for boost power control for the VGL step - up
* circuit ( 5 )
* bits 0 . . 2 in the lower nibble controls LCK , the booster clock
* frequency , the values are the same as for PCK in @ bt1ctr .
* bits 4 . . 5 in the upper nibble controls BTL , the boosting
* amplification for the step - up circuit .
* 0 = AVEE + VCL
* 1 = AVEE - AVDD
* 2 = AVEE + VCL - AVDD
* 3 = AVEE x 2 - AVDD
* The defaults are 3 and 2 yielding 0 x32
*/
u8 bt5ctr[NT35510_P1_BT5CTR_LEN];
/**
* @ vgp : setting for VGP , the positive gamma divider voltages
* VGMP the high voltage and VGSP the low voltage .
* The first byte contains bit 8 of VGMP and VGSP in bits 4 and 0
* The second byte contains bit 0 . . 7 of VGMP
* The third byte contains bit 0 . . 7 of VGSP
* VGMP 0 x00 = 3 . 0 V . . 0 x108 = 6 . 3 V in steps of 12 . 5 mV
* VGSP 0 x00 = 0 V . . 0 x111 = 3 . 7 V in steps of 12 . 5 mV
*/
u8 vgp[NT35510_P1_VGP_LEN];
/**
* @ vgn : setting for VGN , the negative gamma divider voltages ,
* same layout of bytes as @ vgp .
*/
u8 vgn[NT35510_P1_VGN_LEN];
/**
* @ vcmoff : setting the DC VCOM offset voltage
* The first byte contains bit 8 of VCM in bit 0 and VCMOFFSEL in bit 4 .
* The second byte contains bits 0 . . 7 of VCM .
* VCMOFFSEL the common voltage offset mode .
* VCMOFFSEL 0 x00 = VCOM . . 0 x01 Gamma .
* The default is 0 x00 .
* VCM the VCOM output voltage ( VCMOFFSEL = 0 ) or the internal register
* offset for gamma voltage ( VCMOFFSEL = 1 ) .
* VCM 0 x00 = 0 V / 0 . . 0 x118 = 3 . 5 V / 280 in steps of 12 . 5 mV / 1 step
* The default is 0 x00 = 0 V / 0 .
*/
u8 vcmoff[NT35510_P1_VCMOFF_LEN];
/**
* @ dopctr : setting optional control for display
* ERR bits 0 . . 1 in the first byte is the ERR pin output signal setting .
* 0 = Disable , ERR pin output low
* 1 = ERR pin output CRC error only
* 2 = ERR pin output ECC error only
* 3 = ERR pin output CRC and ECC error
* The default is 0 .
* N565 bit 2 in the first byte is the 16 - bit / pixel format selection .
* 0 = R [ 4 : 0 ] + G [ 5 : 3 ] & G [ 2 : 0 ] + B [ 4 : 0 ]
* 1 = G [ 2 : 0 ] + R [ 4 : 0 ] & B [ 4 : 0 ] + G [ 5 : 3 ]
* The default is 0 .
* DIS_EoTP_HS bit 3 in the first byte is " DSI protocol violation " error
* reporting .
* 0 = reporting when error
* 1 = not reporting when error
* DSIM bit 4 in the first byte is the video mode data type enable
* 0 = Video mode data type disable
* 1 = Video mode data type enable
* The default is 0 .
* DSIG bit 5 int the first byte is the generic r / w data type enable
* 0 = Generic r / w disable
* 1 = Generic r / w enable
* The default is 0 .
* DSITE bit 6 in the first byte is TE line enable
* 0 = TE line is disabled
* 1 = TE line is enabled
* The default is 0 .
* RAMKP bit 7 in the first byte is the frame memory keep / loss in
* sleep - in mode
* 0 = contents loss in sleep - in
* 1 = contents keep in sleep - in
* The default is 0 .
* CRL bit 1 in the second byte is the source driver data shift
* direction selection . This bit is XOR operation with bit RSMX
* of 3600 h command .
* 0 ( RMSX = 0 ) = S1 - > S1440
* 0 ( RMSX = 1 ) = S1440 - > S1
* 1 ( RMSX = 0 ) = S1440 - > S1
* 1 ( RMSX = 1 ) = S1 - > S1440
* The default is 0 .
* CTB bit 2 in the second byte is the vertical scanning direction
* selection for gate control signals . This bit is XOR operation
* with bit ML of 3600 h command .
* 0 ( ML = 0 ) = Forward ( top - > bottom )
* 0 ( ML = 1 ) = Reverse ( bottom - > top )
* 1 ( ML = 0 ) = Reverse ( bottom - > top )
* 1 ( ML = 1 ) = Forward ( top - > bottom )
* The default is 0 .
* CRGB bit 3 in the second byte is RGB - BGR order selection . This
* bit is XOR operation with bit RGB of 3600 h command .
* 0 ( RGB = 0 ) = RGB / Normal
* 0 ( RGB = 1 ) = BGR / RB swap
* 1 ( RGB = 0 ) = BGR / RB swap
* 1 ( RGB = 1 ) = RGB / Normal
* The default is 0 .
* TE_PWR_SEL bit 4 in the second byte is the TE output voltage
* level selection ( only valid when DSTB_SEL = 0 or DSTB_SEL = 1 ,
* VSEL = High and VDDI = 1 . 665 ~ 3 . 3 V ) .
* 0 = TE output voltage level is VDDI
* 1 = TE output voltage level is VDDA
* The default is 0 .
*/
u8 dopctr[NT35510_P0_DOPCTR_LEN];
/**
* @ madctl : Memory data access control
* RSMY bit 0 is flip vertical . Flips the display image top to down .
* RSMX bit 1 is flip horizontal . Flips the display image left to right .
* MH bit 2 is the horizontal refresh order .
* RGB bit 3 is the RGB - BGR order .
* 0 = RGB color sequence
* 1 = BGR color sequence
* ML bit 4 is the vertical refresh order .
* MV bit 5 is the row / column exchange .
* MX bit 6 is the column address order .
* MY bit 7 is the row address order .
*/
u8 madctl;
/**
* @ sdhdtctr : source output data hold time
* 0 x00 . . 0 x3F = 0 . . 31 . 5 us in steps of 0 . 5 us
* The default is 0 x05 = 2 . 5 us .
*/
u8 sdhdtctr;
/**
* @ gseqctr : EQ control for gate signals
* GFEQ_XX [ 3 : 0 ] : time setting of EQ step for falling edge in steps
* of 0 . 5 us .
* The default is 0 x07 = 3 . 5 us
* GREQ_XX [ 7 : 4 ] : time setting of EQ step for rising edge in steps
* of 0 . 5 us .
* The default is 0 x07 = 3 . 5 us
*/
u8 gseqctr[NT35510_P0_GSEQCTR_LEN];
/**
* @ sdeqctr : Source driver control settings , first byte is
* 0 for mode 1 and 1 for mode 2 . Mode 1 uses two steps and
* mode 2 uses three steps meaning EQS3 is not used in mode
* 1 . Mode 2 is default . The last three parameters are EQS1 , EQS2
* and EQS3 , setting the rise time for each equalizer step :
* 0 x00 = 0 . 0 us to 0 x0f = 7 . 5 us in steps of 0 . 5 us . The default
* is 0 x07 = 3 . 5 us .
*/
u8 sdeqctr[NT35510_P0_SDEQCTR_LEN];
/**
* @ sdvpctr : power / voltage behaviour during vertical porch time
*/
u8 sdvpctr;
/**
* @ t1 : the number of pixel clocks on one scanline , range
* 0 x100 ( 258 ticks ) . . 0 x3FF ( 1024 ticks ) so the value + 1
* clock ticks .
*/
u16 t1;
/**
* @ vbp : vertical back porch toward the PANEL note : not toward
* the DSI host ; these are separate interfaces , in from DSI host
* and out to the panel .
*/
u8 vbp;
/**
* @ vfp : vertical front porch toward the PANEL .
*/
u8 vfp;
/**
* @ psel : pixel clock divisor : 0 = 1 , 1 = 2 , 2 = 4 , 3 = 8 .
*/
u8 psel;
/**
* @ dpmctr12 : Display timing control 12
* Byte 1 bit 4 selects LVGL voltage level : 0 = VGLX , 1 = VGL_REG
* Byte 1 bit 1 selects gate signal mode : 0 = non - overlap , 1 = overlap
* Byte 1 bit 0 selects output signal control R / L swap , 0 = normal
* 1 = swap all O - > E , L - > R
* Byte 2 is CLW delay clock for CK O / E and CKB O / E signals :
* 0 x00 = 0 us . . 0 xFF = 12 . 75 us in 0 . 05 us steps
* Byte 3 is FTI_H0 delay time for STP O / E signals :
* 0 x00 = 0 us . . 0 xFF = 12 . 75 us in 0 . 05 us steps
*/
u8 dpmctr12[NT35510_P0_DPMCTR12_LEN];
/**
* @ gamma_corr_pos_r : Red gamma correction parameters , positive
*/
u8 gamma_corr_pos_r[NT35510_P1_GAMMA_LEN];
/**
* @ gamma_corr_pos_g : Green gamma correction parameters , positive
*/
u8 gamma_corr_pos_g[NT35510_P1_GAMMA_LEN];
/**
* @ gamma_corr_pos_b : Blue gamma correction parameters , positive
*/
u8 gamma_corr_pos_b[NT35510_P1_GAMMA_LEN];
/**
* @ gamma_corr_neg_r : Red gamma correction parameters , negative
*/
u8 gamma_corr_neg_r[NT35510_P1_GAMMA_LEN];
/**
* @ gamma_corr_neg_g : Green gamma correction parameters , negative
*/
u8 gamma_corr_neg_g[NT35510_P1_GAMMA_LEN];
/**
* @ gamma_corr_neg_b : Blue gamma correction parameters , negative
*/
u8 gamma_corr_neg_b[NT35510_P1_GAMMA_LEN];
/**
* @ wrdisbv : write display brightness
* 0 x00 value means the lowest brightness and 0 xff value means
* the highest brightness .
* The default is 0 x00 .
*/
u8 wrdisbv;
/**
* @ wrctrld : write control display
* G bit 0 selects gamma curve : 0 = Manual , 1 = Automatic
* DB bit 1 selects display brightness : 0 = Manual , 1 = Automatic
* BL bit 2 controls backlight control : 0 = Off , 1 = On
* DD bit 3 controls display dimming : 0 = Off , 1 = On
* A bit 4 controls LABC block : 0 = Off , 1 = On
* BCTRL bit 5 controls brightness block : 0 = Off , 1 = On
*/
u8 wrctrld;
/**
* @ wrcabc : write content adaptive brightness control
* There is possible to use 4 different modes for content adaptive
* image functionality :
* 0 : Off
* 1 : User Interface Image ( UI - Mode )
* 2 : Still Picture Image ( Still - Mode )
* 3 : Moving Picture Image ( Moving - Mode )
* The default is 0
*/
u8 wrcabc;
/**
* @ wrcabcmb : write CABC minimum brightness
* Set the minimum brightness value of the display for CABC
* function .
* 0 x00 value means the lowest brightness for CABC and 0 xff
* value means the highest brightness for CABC .
* The default is 0 x00 .
*/
u8 wrcabcmb;
};
/**
* struct nt35510 - state container for the NT35510 panel
*/
struct nt35510 {
/**
* @ dev : the container device
*/
struct device *dev;
/**
* @ conf : the specific panel configuration , as the NT35510
* can be combined with many physical panels , they can have
* different physical dimensions and gamma correction etc ,
* so this is stored in the config .
*/
const struct nt35510_config *conf;
/**
* @ panel : the DRM panel object for the instance
*/
struct drm_panel panel;
/**
* @ supplies : regulators supplying the panel
*/
struct regulator_bulk_data supplies[2 ];
/**
* @ reset_gpio : the reset line
*/
struct gpio_desc *reset_gpio;
};
/* Manufacturer command has strictly this byte sequence */
static const u8 nt35510_mauc_mtp_read_param[] = { 0 xAA, 0 x55, 0 x25, 0 x01 };
static const u8 nt35510_mauc_mtp_read_setting[] = { 0 x01, 0 x02, 0 x00, 0 x20,
0 x33, 0 x13, 0 x00, 0 x40,
0 x00, 0 x00, 0 x23, 0 x02 };
static const u8 nt35510_mauc_select_page_0[] = { 0 x55, 0 xAA, 0 x52, 0 x08, 0 x00 };
static const u8 nt35510_mauc_select_page_1[] = { 0 x55, 0 xAA, 0 x52, 0 x08, 0 x01 };
static const u8 nt35510_vgh_on[] = { 0 x01 };
static inline struct nt35510 *panel_to_nt35510(struct drm_panel *panel)
{
return container_of(panel, struct nt35510, panel);
}
#define NT35510_ROTATE_0_SETTING 0 x02
#define NT35510_ROTATE_180_SETTING 0 x00
static int nt35510_send_long(struct nt35510 *nt, struct mipi_dsi_device *dsi,
u8 cmd, u8 cmdlen, const u8 *seq)
{
const u8 *seqp = seq;
int cmdwritten = 0 ;
int chunk = cmdlen;
int ret;
if (chunk > 15 )
chunk = 15 ;
ret = mipi_dsi_dcs_write(dsi, cmd, seqp, chunk);
if (ret < 0 ) {
dev_err(nt->dev, "error sending DCS command seq cmd %02x\n" , cmd);
return ret;
}
cmdwritten += chunk;
seqp += chunk;
while (cmdwritten < cmdlen) {
chunk = cmdlen - cmdwritten;
if (chunk > 15 )
chunk = 15 ;
ret = mipi_dsi_generic_write(dsi, seqp, chunk);
if (ret < 0 ) {
dev_err(nt->dev, "error sending generic write seq %02x\n" , cmd);
return ret;
}
cmdwritten += chunk;
seqp += chunk;
}
dev_dbg(nt->dev, "sent command %02x %02x bytes\n" , cmd, cmdlen);
return 0 ;
}
static int nt35510_read_id(struct nt35510 *nt)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
u8 id1, id2, id3;
int ret;
ret = mipi_dsi_dcs_read(dsi, MCS_CMD_READ_ID1, &id1, 1 );
if (ret < 0 ) {
dev_err(nt->dev, "could not read MTP ID1\n" );
return ret;
}
ret = mipi_dsi_dcs_read(dsi, MCS_CMD_READ_ID2, &id2, 1 );
if (ret < 0 ) {
dev_err(nt->dev, "could not read MTP ID2\n" );
return ret;
}
ret = mipi_dsi_dcs_read(dsi, MCS_CMD_READ_ID3, &id3, 1 );
if (ret < 0 ) {
dev_err(nt->dev, "could not read MTP ID3\n" );
return ret;
}
/*
* Multi - Time Programmable ( ? ) memory contains manufacturer
* ID ( e . g . Hydis 0 x55 ) , driver ID ( e . g . NT35510 0 xc0 ) and
* version .
*/
dev_info(nt->dev, "MTP ID manufacturer: %02x version: %02x driver: %02x\n" , id1, id2, id3);
return 0 ;
}
/**
* nt35510_setup_power ( ) - set up power config in page 1
* @ nt : the display instance to set up
*/
static int nt35510_setup_power(struct nt35510 *nt)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
int ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETAVDD,
NT35510_P1_AVDD_LEN,
nt->conf->avdd);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_BT1CTR,
NT35510_P1_BT1CTR_LEN,
nt->conf->bt1ctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETAVEE,
NT35510_P1_AVEE_LEN,
nt->conf->avee);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_BT2CTR,
NT35510_P1_BT2CTR_LEN,
nt->conf->bt2ctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETVCL,
NT35510_P1_VCL_LEN,
nt->conf->vcl);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_BT3CTR,
NT35510_P1_BT3CTR_LEN,
nt->conf->bt3ctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETVGH,
NT35510_P1_VGH_LEN,
nt->conf->vgh);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_BT4CTR,
NT35510_P1_BT4CTR_LEN,
nt->conf->bt4ctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_VGHCTR,
ARRAY_SIZE(nt35510_vgh_on),
nt35510_vgh_on);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETVGL,
NT35510_P1_VGL_LEN,
nt->conf->vgl);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_BT5CTR,
NT35510_P1_BT5CTR_LEN,
nt->conf->bt5ctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETVGP,
NT35510_P1_VGP_LEN,
nt->conf->vgp);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETVGN,
NT35510_P1_VGN_LEN,
nt->conf->vgn);
if (ret)
return ret;
if (nt->conf->cmds & NT35510_CMD_SETVCMOFF) {
ret = nt35510_send_long(nt, dsi, NT35510_P1_SETVCMOFF,
NT35510_P1_VCMOFF_LEN,
nt->conf->vcmoff);
if (ret)
return ret;
}
/* Typically 10 ms */
usleep_range(10000 , 20000 );
return 0 ;
}
/**
* nt35510_setup_display ( ) - set up display config in page 0
* @ nt : the display instance to set up
*/
static int nt35510_setup_display(struct nt35510 *nt)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
const struct nt35510_config *conf = nt->conf;
u8 dpfrctr[NT35510_P0_DPFRCTR1_LEN];
int ret;
ret = nt35510_send_long(nt, dsi, NT35510_P0_DOPCTR,
NT35510_P0_DOPCTR_LEN,
conf->dopctr);
if (ret)
return ret;
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_ADDRESS_MODE, &conf->madctl,
sizeof (conf->madctl));
if (ret < 0 )
return ret;
ret = mipi_dsi_dcs_write(dsi, NT35510_P0_SDHDTCTR, &conf->sdhdtctr,
sizeof (conf->sdhdtctr));
if (ret < 0 )
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P0_GSEQCTR,
NT35510_P0_GSEQCTR_LEN,
conf->gseqctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P0_SDEQCTR,
NT35510_P0_SDEQCTR_LEN,
conf->sdeqctr);
if (ret)
return ret;
ret = mipi_dsi_dcs_write(dsi, NT35510_P0_SDVPCTR,
&conf->sdvpctr, 1 );
if (ret < 0 )
return ret;
/*
* Display timing control for active and idle off mode :
* the first byte contains
* the two high bits of T1A and second byte the low 8 bits , and
* the valid range is 0 x100 ( 257 ) to 0 x3ff ( 1023 ) representing
* 258 . . 1024 ( + 1 ) pixel clock ticks for one scanline . At 20 MHz pixel
* clock this covers the range of 12 . 90 us . . 51 . 20 us in steps of
* 0 . 05 us , the default is 0 x184 ( 388 ) representing 389 ticks .
* The third byte is VBPDA , vertical back porch display active
* and the fourth VFPDA , vertical front porch display active ,
* both given in number of scanlines in the range 0 x02 . . 0 xff
* for 2 . . 255 scanlines . The fifth byte is 2 bits selecting
* PSEL for active and idle off mode , how much the 20 MHz clock
* is divided by 0 . . 3 . This needs to be adjusted to get the right
* frame rate .
*/
dpfrctr[0 ] = (conf->t1 >> 8 ) & 0 xFF;
dpfrctr[1 ] = conf->t1 & 0 xFF;
/* Vertical back porch */
dpfrctr[2 ] = conf->vbp;
/* Vertical front porch */
dpfrctr[3 ] = conf->vfp;
dpfrctr[4 ] = conf->psel;
ret = nt35510_send_long(nt, dsi, NT35510_P0_DPFRCTR1,
NT35510_P0_DPFRCTR1_LEN,
dpfrctr);
if (ret)
return ret;
/* For idle and partial idle off mode we decrease front porch by one */
dpfrctr[3 ]--;
ret = nt35510_send_long(nt, dsi, NT35510_P0_DPFRCTR2,
NT35510_P0_DPFRCTR2_LEN,
dpfrctr);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P0_DPFRCTR3,
NT35510_P0_DPFRCTR3_LEN,
dpfrctr);
if (ret)
return ret;
/* Enable TE on vblank */
ret = mipi_dsi_dcs_set_tear_on(dsi, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
if (ret)
return ret;
/* Turn on the pads? */
ret = nt35510_send_long(nt, dsi, NT35510_P0_DPMCTR12,
NT35510_P0_DPMCTR12_LEN,
conf->dpmctr12);
if (ret)
return ret;
return 0 ;
}
static int nt35510_set_brightness(struct backlight_device *bl)
{
struct nt35510 *nt = bl_get_data(bl);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
u8 brightness = bl->props.brightness;
int ret;
dev_dbg(nt->dev, "set brightness %d\n" , brightness);
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_DISPLAY_BRIGHTNESS,
&brightness,
sizeof (brightness));
if (ret < 0 )
return ret;
return 0 ;
}
static const struct backlight_ops nt35510_bl_ops = {
.update_status = nt35510_set_brightness,
};
/*
* This power - on sequence
*/
static int nt35510_power_on(struct nt35510 *nt)
{
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(nt->supplies), nt->supplies);
if (ret < 0 ) {
dev_err(nt->dev, "unable to enable regulators\n" );
return ret;
}
/* Toggle RESET in accordance with datasheet page 370 */
if (nt->reset_gpio) {
gpiod_set_value(nt->reset_gpio, 1 );
/* Active min 10 us according to datasheet, let's say 20 */
usleep_range(20 , 1000 );
gpiod_set_value(nt->reset_gpio, 0 );
/*
* 5 ms during sleep mode , 120 ms during sleep out mode
* according to datasheet , let ' s use 120 - 140 ms .
*/
usleep_range(120000 , 140000 );
}
ret = nt35510_send_long(nt, dsi, MCS_CMD_MTP_READ_PARAM,
ARRAY_SIZE(nt35510_mauc_mtp_read_param),
nt35510_mauc_mtp_read_param);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, MCS_CMD_MTP_READ_SETTING,
ARRAY_SIZE(nt35510_mauc_mtp_read_setting),
nt35510_mauc_mtp_read_setting);
if (ret)
return ret;
nt35510_read_id(nt);
/* Set up stuff in manufacturer control, page 1 */
ret = nt35510_send_long(nt, dsi, MCS_CMD_MAUCCTR,
ARRAY_SIZE(nt35510_mauc_select_page_1),
nt35510_mauc_select_page_1);
if (ret)
return ret;
ret = nt35510_setup_power(nt);
if (ret)
return ret;
if (nt->conf->cmds & NT35510_CMD_CORRECT_GAMMA) {
ret = nt35510_send_long(nt, dsi, NT35510_P1_SET_GAMMA_RED_POS,
NT35510_P1_GAMMA_LEN,
nt->conf->gamma_corr_pos_r);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SET_GAMMA_GREEN_POS,
NT35510_P1_GAMMA_LEN,
nt->conf->gamma_corr_pos_g);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SET_GAMMA_BLUE_POS,
NT35510_P1_GAMMA_LEN,
nt->conf->gamma_corr_pos_b);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SET_GAMMA_RED_NEG,
NT35510_P1_GAMMA_LEN,
nt->conf->gamma_corr_neg_r);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SET_GAMMA_GREEN_NEG,
NT35510_P1_GAMMA_LEN,
nt->conf->gamma_corr_neg_g);
if (ret)
return ret;
ret = nt35510_send_long(nt, dsi, NT35510_P1_SET_GAMMA_BLUE_NEG,
NT35510_P1_GAMMA_LEN,
nt->conf->gamma_corr_neg_b);
if (ret)
return ret;
}
/* Set up stuff in manufacturer control, page 0 */
ret = nt35510_send_long(nt, dsi, MCS_CMD_MAUCCTR,
ARRAY_SIZE(nt35510_mauc_select_page_0),
nt35510_mauc_select_page_0);
if (ret)
return ret;
ret = nt35510_setup_display(nt);
if (ret)
return ret;
return 0 ;
}
static int nt35510_power_off(struct nt35510 *nt)
{
int ret;
ret = regulator_bulk_disable(ARRAY_SIZE(nt->supplies), nt->supplies);
if (ret)
return ret;
if (nt->reset_gpio)
gpiod_set_value(nt->reset_gpio, 1 );
return 0 ;
}
static int nt35510_unprepare(struct drm_panel *panel)
{
struct nt35510 *nt = panel_to_nt35510(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
int ret;
ret = mipi_dsi_dcs_set_display_off(dsi);
if (ret) {
dev_err(nt->dev, "failed to turn display off (%d)\n" , ret);
return ret;
}
usleep_range(10000 , 20000 );
/* Enter sleep mode */
ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
if (ret) {
dev_err(nt->dev, "failed to enter sleep mode (%d)\n" , ret);
return ret;
}
/* Wait 4 frames, how much is that 5ms in the vendor driver */
usleep_range(5000 , 10000 );
ret = nt35510_power_off(nt);
if (ret)
return ret;
return 0 ;
}
static int nt35510_prepare(struct drm_panel *panel)
{
struct nt35510 *nt = panel_to_nt35510(panel);
struct mipi_dsi_device *dsi = to_mipi_dsi_device(nt->dev);
int ret;
ret = nt35510_power_on(nt);
if (ret)
return ret;
/* Exit sleep mode */
ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
if (ret) {
dev_err(nt->dev, "failed to exit sleep mode (%d)\n" , ret);
return ret;
}
/* Up to 120 ms */
usleep_range(120000 , 150000 );
if (nt->conf->cmds & NT35510_CMD_CONTROL_DISPLAY) {
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_CONTROL_DISPLAY,
&nt->conf->wrctrld,
sizeof (nt->conf->wrctrld));
if (ret < 0 )
return ret;
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_WRITE_POWER_SAVE,
&nt->conf->wrcabc,
sizeof (nt->conf->wrcabc));
if (ret < 0 )
return ret;
ret = mipi_dsi_dcs_write(dsi, MIPI_DCS_SET_CABC_MIN_BRIGHTNESS,
&nt->conf->wrcabcmb,
sizeof (nt->conf->wrcabcmb));
if (ret < 0 )
return ret;
}
ret = mipi_dsi_dcs_set_display_on(dsi);
if (ret) {
dev_err(nt->dev, "failed to turn display on (%d)\n" , ret);
return ret;
}
/* Some 10 ms */
usleep_range(10000 , 20000 );
return 0 ;
}
static int nt35510_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
struct nt35510 *nt = panel_to_nt35510(panel);
struct drm_display_mode *mode;
struct drm_display_info *info;
info = &connector->display_info;
info->width_mm = nt->conf->width_mm;
info->height_mm = nt->conf->height_mm;
mode = drm_mode_duplicate(connector->dev, &nt->conf->mode);
if (!mode) {
dev_err(panel->dev, "bad mode or failed to add mode\n" );
return -EINVAL;
}
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
mode->width_mm = nt->conf->width_mm;
mode->height_mm = nt->conf->height_mm;
drm_mode_probed_add(connector, mode);
return 1 ; /* Number of modes */
}
static const struct drm_panel_funcs nt35510_drm_funcs = {
.unprepare = nt35510_unprepare,
.prepare = nt35510_prepare,
.get_modes = nt35510_get_modes,
};
static int nt35510_probe(struct mipi_dsi_device *dsi)
{
struct device *dev = &dsi->dev;
struct nt35510 *nt;
int ret;
nt = devm_drm_panel_alloc(dev, struct nt35510, panel,
&nt35510_drm_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(nt))
return PTR_ERR(nt);
mipi_dsi_set_drvdata(dsi, nt);
nt->dev = dev;
dsi->lanes = 2 ;
dsi->format = MIPI_DSI_FMT_RGB888;
/*
* Datasheet suggests max HS rate for NT35510 is 250 MHz
* ( period time 4 ns , see figure 7 . 6 . 4 page 365 ) and max LP rate is
* 20 MHz ( period time 50 ns , see figure 7 . 6 . 6 . page 366 ) .
* However these frequencies appear in source code for the Hydis
* HVA40WV1 panel and setting up the LP frequency makes the panel
* not work .
*
* TODO : if other panels prove to be closer to the datasheet ,
* maybe make this a per - panel config in struct nt35510_config ?
*/
dsi->hs_rate = 349440000 ;
dsi->lp_rate = 9600000 ;
/*
* Every new incarnation of this display must have a unique
* data entry for the system in this driver .
*/
nt->conf = of_device_get_match_data(dev);
if (!nt->conf) {
dev_err(dev, "missing device configuration\n" );
return -ENODEV;
}
dsi->mode_flags = nt->conf->mode_flags;
nt->supplies[0 ].supply = "vdd" ; /* 2.3-4.8 V */
nt->supplies[1 ].supply = "vddi" ; /* 1.65-3.3V */
ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(nt->supplies),
nt->supplies);
if (ret < 0 )
return ret;
ret = regulator_set_voltage(nt->supplies[0 ].consumer,
2300000 , 4800000 );
if (ret)
return ret;
ret = regulator_set_voltage(nt->supplies[1 ].consumer,
1650000 , 3300000 );
if (ret)
return ret;
nt->reset_gpio = devm_gpiod_get_optional(dev, "reset" , GPIOD_OUT_HIGH);
if (IS_ERR(nt->reset_gpio)) {
dev_err(dev, "error getting RESET GPIO\n" );
return PTR_ERR(nt->reset_gpio);
}
/*
* First , try to locate an external backlight ( such as on GPIO )
* if this fails , assume we will want to use the internal backlight
* control .
*/
ret = drm_panel_of_backlight(&nt->panel);
if (ret) {
dev_err(dev, "error getting external backlight %d\n" , ret);
return ret;
}
if (!nt->panel.backlight) {
struct backlight_device *bl;
bl = devm_backlight_device_register(dev, "nt35510" , dev, nt,
&nt35510_bl_ops, NULL);
if (IS_ERR(bl)) {
dev_err(dev, "failed to register backlight device\n" );
return PTR_ERR(bl);
}
bl->props.max_brightness = 255 ;
if (nt->conf->cmds & NT35510_CMD_CONTROL_DISPLAY)
bl->props.brightness = nt->conf->wrdisbv;
else
bl->props.brightness = 255 ;
bl->props.power = BACKLIGHT_POWER_OFF;
nt->panel.backlight = bl;
}
drm_panel_add(&nt->panel);
ret = mipi_dsi_attach(dsi);
if (ret < 0 )
drm_panel_remove(&nt->panel);
return 0 ;
}
static void nt35510_remove(struct mipi_dsi_device *dsi)
{
struct nt35510 *nt = mipi_dsi_get_drvdata(dsi);
int ret;
mipi_dsi_detach(dsi);
/* Power off */
ret = nt35510_power_off(nt);
if (ret)
dev_err(&dsi->dev, "Failed to power off\n" );
drm_panel_remove(&nt->panel);
}
/*
* These gamma correction values are 10 bit tuples , so only bits 0 and 1 is
* ever used in the first byte . They form a positive and negative gamma
* correction curve for each color , values must be strictly higher for each
* step on the curve . As can be seen these default curves goes from 0 x0001
* to 0 x03FE .
*/
#define NT35510_GAMMA_POS_DEFAULT 0 x00, 0 x01, 0 x00, 0 x43, 0 x00, \
0 x6B, 0 x00, 0 x87, 0 x00, 0 xA3, 0 x00, 0 xCE, 0 x00, 0 xF1, 0 x01, \
0 x27, 0 x01, 0 x53, 0 x01, 0 x98, 0 x01, 0 xCE, 0 x02, 0 x22, 0 x02, \
0 x83, 0 x02, 0 x78, 0 x02, 0 x9E, 0 x02, 0 xDD, 0 x03, 0 x00, 0 x03, \
0 x2E, 0 x03, 0 x54, 0 x03, 0 x7F, 0 x03, 0 x95, 0 x03, 0 xB3, 0 x03, \
0 xC2, 0 x03, 0 xE1, 0 x03, 0 xF1, 0 x03, 0 xFE
#define NT35510_GAMMA_NEG_DEFAULT 0 x00, 0 x01, 0 x00, 0 x43, 0 x00, \
0 x6B, 0 x00, 0 x87, 0 x00, 0 xA3, 0 x00, 0 xCE, 0 x00, 0 xF1, 0 x01, \
0 x27, 0 x01, 0 x53, 0 x01, 0 x98, 0 x01, 0 xCE, 0 x02, 0 x22, 0 x02, \
0 x43, 0 x02, 0 x50, 0 x02, 0 x9E, 0 x02, 0 xDD, 0 x03, 0 x00, 0 x03, \
0 x2E, 0 x03, 0 x54, 0 x03, 0 x7F, 0 x03, 0 x95, 0 x03, 0 xB3, 0 x03, \
0 xC2, 0 x03, 0 xE1, 0 x03, 0 xF1, 0 x03, 0 xFE
/*
* The Hydis HVA40WV1 panel
*/
static const struct nt35510_config nt35510_hydis_hva40wv1 = {
.width_mm = 52 ,
.height_mm = 86 ,
/**
* As the Hydis panel is used in command mode , the porches etc
* are settings programmed internally into the NT35510 controller
* and generated toward the physical display . As the panel is not
* used in video mode , these are not really exposed to the DSI
* host .
*
* Display frame rate control :
* Frame rate = ( 20 MHz / 1 ) / ( 389 * ( 7 + 50 + 800 ) ) ~ = 60 Hz
*/
.mode = {
/* The internal pixel clock of the NT35510 is 20 MHz */
.clock = 20000 ,
.hdisplay = 480 ,
.hsync_start = 480 + 2 , /* HFP = 2 */
.hsync_end = 480 + 2 + 0 , /* HSync = 0 */
.htotal = 480 + 2 + 0 + 5 , /* HBP = 5 */
.vdisplay = 800 ,
.vsync_start = 800 + 2 , /* VFP = 2 */
.vsync_end = 800 + 2 + 0 , /* VSync = 0 */
.vtotal = 800 + 2 + 0 + 5 , /* VBP = 5 */
.flags = 0 ,
},
.mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS,
.cmds = NT35510_CMD_CORRECT_GAMMA,
/* 0x09: AVDD = 5.6V */
.avdd = { 0 x09, 0 x09, 0 x09 },
/* 0x34: PCK = Hsync/2, BTP = 2 x VDDB */
.bt1ctr = { 0 x34, 0 x34, 0 x34 },
/* 0x09: AVEE = -5.6V */
.avee = { 0 x09, 0 x09, 0 x09 },
/* 0x24: NCK = Hsync/2, BTN = -2 x VDDB */
.bt2ctr = { 0 x24, 0 x24, 0 x24 },
/* VBCLA: -2.5V, VBCLB: -2.5V, VBCLC: -2.5V */
.vcl = { 0 x00, 0 x00, 0 x00 },
/* 0x24: CLCK = Hsync/2, BTN = -1 x VDDB */
.bt3ctr = { 0 x24, 0 x24, 0 x24 },
/* 0x05 = 12V */
.vgh = { 0 x05, 0 x05, 0 x05 },
/* 0x24: NCKA = Hsync/2, VGH = 2 x AVDD - AVEE */
.bt4ctr = { 0 x24, 0 x24, 0 x24 },
/* 0x0B = -13V */
.vgl = { 0 x0B, 0 x0B, 0 x0B },
/* 0x24: LCKA = Hsync, VGL = AVDD + VCL - AVDD */
.bt5ctr = { 0 x24, 0 x24, 0 x24 },
/* VGMP: 0x0A3 = 5.0375V, VGSP = 0V */
.vgp = { 0 x00, 0 xA3, 0 x00 },
/* VGMP: 0x0A3 = 5.0375V, VGSP = 0V */
.vgn = { 0 x00, 0 xA3, 0 x00 },
/* VCMOFFSEL = VCOM voltage offset mode, VCM = 0V */
.vcmoff = { 0 x00, 0 x00 },
/* Enable TE, EoTP and RGB pixel format */
.dopctr = { NT35510_DOPCTR_0_DSITE | NT35510_DOPCTR_0_EOTP |
NT35510_DOPCTR_0_N565, NT35510_DOPCTR_1_CTB },
.madctl = NT35510_ROTATE_0_SETTING,
/* 0x0A: SDT = 5 us */
.sdhdtctr = 0 x0A,
/* EQ control for gate signals, 0x00 = 0 us */
.gseqctr = { 0 x00, 0 x00 },
/* SDEQCTR: source driver EQ mode 2, 2.5 us rise time on each step */
.sdeqctr = { 0 x01, 0 x05, 0 x05, 0 x05 },
/* SDVPCTR: Normal operation off color during v porch */
.sdvpctr = 0 x01,
/* T1: number of pixel clocks on one scanline: 0x184 = 389 clocks */
.t1 = 0 x0184,
/* VBP: vertical back porch toward the panel */
.vbp = 7 ,
/* VFP: vertical front porch toward the panel */
.vfp = 50 ,
/* PSEL: divide pixel clock 20MHz with 1 (no clock downscaling) */
.psel = 0 ,
/* DPTMCTR12: 0x03: LVGL = VGLX, overlap mode, swap R->L O->E */
.dpmctr12 = { 0 x03, 0 x00, 0 x00, },
/* Default gamma correction values */
.gamma_corr_pos_r = { NT35510_GAMMA_POS_DEFAULT },
.gamma_corr_pos_g = { NT35510_GAMMA_POS_DEFAULT },
.gamma_corr_pos_b = { NT35510_GAMMA_POS_DEFAULT },
.gamma_corr_neg_r = { NT35510_GAMMA_NEG_DEFAULT },
.gamma_corr_neg_g = { NT35510_GAMMA_NEG_DEFAULT },
.gamma_corr_neg_b = { NT35510_GAMMA_NEG_DEFAULT },
};
static const struct nt35510_config nt35510_frida_frd400b25025 = {
.width_mm = 52 ,
.height_mm = 86 ,
.mode = {
.clock = 23000 ,
.hdisplay = 480 ,
.hsync_start = 480 + 34 , /* HFP = 34 */
.hsync_end = 480 + 34 + 2 , /* HSync = 2 */
.htotal = 480 + 34 + 2 + 34 , /* HBP = 34 */
.vdisplay = 800 ,
.vsync_start = 800 + 15 , /* VFP = 15 */
.vsync_end = 800 + 15 + 12 , /* VSync = 12 */
.vtotal = 800 + 15 + 12 + 15 , /* VBP = 15 */
.flags = 0 ,
},
.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
MIPI_DSI_MODE_LPM,
.cmds = NT35510_CMD_CONTROL_DISPLAY | NT35510_CMD_SETVCMOFF,
/* 0x03: AVDD = 6.2V */
.avdd = { 0 x03, 0 x03, 0 x03 },
/* 0x46: PCK = 2 x Hsync, BTP = 2.5 x VDDB */
.bt1ctr = { 0 x46, 0 x46, 0 x46 },
/* 0x03: AVEE = -6.2V */
.avee = { 0 x03, 0 x03, 0 x03 },
/* 0x36: PCK = 2 x Hsync, BTP = 2 x VDDB */
.bt2ctr = { 0 x36, 0 x36, 0 x36 },
/* VBCLA: -2.5V, VBCLB: -2.5V, VBCLC: -3.5V */
.vcl = { 0 x00, 0 x00, 0 x02 },
/* 0x26: CLCK = 2 x Hsync, BTN = -1 x VDDB */
.bt3ctr = { 0 x26, 0 x26, 0 x26 },
/* 0x09 = 16V */
.vgh = { 0 x09, 0 x09, 0 x09 },
/* 0x36: HCK = 2 x Hsync, VGH = 2 x AVDD - AVEE */
.bt4ctr = { 0 x36, 0 x36, 0 x36 },
/* 0x08 = -10V */
.vgl = { 0 x08, 0 x08, 0 x08 },
/* 0x26: LCK = 2 x Hsync, VGL = AVDD + VCL - AVDD */
.bt5ctr = { 0 x26, 0 x26, 0 x26 },
/* VGMP: 0x080 = 4.6V, VGSP = 0V */
.vgp = { 0 x00, 0 x80, 0 x00 },
/* VGMP: 0x080 = 4.6V, VGSP = 0V */
.vgn = { 0 x00, 0 x80, 0 x00 },
/* VCMOFFSEL = VCOM voltage offset mode, VCM = -1V */
.vcmoff = { 0 x00, 0 x50 },
.dopctr = { NT35510_DOPCTR_0_RAMKP | NT35510_DOPCTR_0_DSITE |
NT35510_DOPCTR_0_DSIG | NT35510_DOPCTR_0_DSIM |
NT35510_DOPCTR_0_EOTP | NT35510_DOPCTR_0_N565, 0 },
.madctl = NT35510_ROTATE_180_SETTING,
/* 0x03: SDT = 1.5 us */
.sdhdtctr = 0 x03,
/* EQ control for gate signals, 0x00 = 0 us */
.gseqctr = { 0 x00, 0 x00 },
/* SDEQCTR: source driver EQ mode 2, 1 us rise time on each step */
.sdeqctr = { 0 x01, 0 x02, 0 x02, 0 x02 },
/* SDVPCTR: Normal operation off color during v porch */
.sdvpctr = 0 x01,
/* T1: number of pixel clocks on one scanline: 0x184 = 389 clocks */
.t1 = 0 x0184,
/* VBP: vertical back porch toward the panel */
.vbp = 0 x1C,
/* VFP: vertical front porch toward the panel */
.vfp = 0 x1C,
/* PSEL: divide pixel clock 23MHz with 1 (no clock downscaling) */
.psel = 0 ,
/* DPTMCTR12: 0x03: LVGL = VGLX, overlap mode, swap R->L O->E */
.dpmctr12 = { 0 x03, 0 x00, 0 x00, },
/* write display brightness */
.wrdisbv = 0 x7f,
/* write control display */
.wrctrld = NT35510_WRCTRLD_BCTRL | NT35510_WRCTRLD_DD |
NT35510_WRCTRLD_BL,
/* write content adaptive brightness control */
.wrcabc = NT35510_WRCABC_STILL_MODE,
/* write CABC minimum brightness */
.wrcabcmb = 0 xff,
};
static const struct of_device_id nt35510_of_match[] = {
{
.compatible = "frida,frd400b25025" ,
.data = &nt35510_frida_frd400b25025,
},
{
.compatible = "hydis,hva40wv1" ,
.data = &nt35510_hydis_hva40wv1,
},
{ }
};
MODULE_DEVICE_TABLE(of, nt35510_of_match);
static struct mipi_dsi_driver nt35510_driver = {
.probe = nt35510_probe,
.remove = nt35510_remove,
.driver = {
.name = "panel-novatek-nt35510" ,
.of_match_table = nt35510_of_match,
},
};
module_mipi_dsi_driver(nt35510_driver);
MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>" );
MODULE_DESCRIPTION("NT35510-based panel driver" );
MODULE_LICENSE("GPL v2" );
Messung V0.5 in Prozent C=89 H=100 G=94
¤ Dauer der Verarbeitung: 0.35 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland