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staging: fbtft: use init function instead of init sequence

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This patch converts the default init sequence of the ST7789V
display controller into an init function, as init sequences
are considered deprecated by the maintainers of fbtft.

Signed-off-by: Dennis Menschel <menschel-d@posteo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dennis Menschel 2015-10-21 23:16:55 +02:00 committed by Greg Kroah-Hartman
parent 5d7b169214
commit ef8f317795
1 changed files with 24 additions and 19 deletions
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43
drivers/staging/fbtft/fb_st7789v.c
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@ -15,6 +15,7 @@
*/
#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
@ -69,63 +70,67 @@ enum st7789v_command {
#define MADCTL_MY BIT(7) /* bitmask for page address order */
/**
* default_init_sequence - default initialization sequence for ST7789V
* init_display() - initialize the display controller
*
* Most of the commands in this init sequence set their parameters to the
* @par: FBTFT parameter object
*
* Most of the commands in this init function set their parameters to the
* same default values which are already in place after the display has been
* powered up. (The main exception to this rule is the pixel format which
* would default to 18 instead of 16 bit per pixel.)
* Nonetheless, this sequence can be used as a template for concrete
* displays which usually need some adjustments.
*
* Return: 0 on success, < 0 if error occurred.
*/
static int default_init_sequence[] = {
static int init_display(struct fbtft_par *par)
{
/* turn off sleep mode */
-1, MIPI_DCS_EXIT_SLEEP_MODE,
-2, 120,
write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
mdelay(120);
/* set pixel format to RGB-565 */
-1, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT,
write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
-1, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22,
write_reg(par, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22);
/*
* VGH = 13.26V
* VGL = -10.43V
*/
-1, GCTRL, 0x35,
write_reg(par, GCTRL, 0x35);
/*
* VDV and VRH register values come from command write
* (instead of NVM)
*/
-1, VDVVRHEN, 0x01, 0xFF,
write_reg(par, VDVVRHEN, 0x01, 0xFF);
/*
* VAP = 4.1V + (VCOM + VCOM offset + 0.5 * VDV)
* VAN = -4.1V + (VCOM + VCOM offset + 0.5 * VDV)
*/
-1, VRHS, 0x0B,
write_reg(par, VRHS, 0x0B);
/* VDV = 0V */
-1, VDVS, 0x20,
write_reg(par, VDVS, 0x20);
/* VCOM = 0.9V */
-1, VCOMS, 0x20,
write_reg(par, VCOMS, 0x20);
/* VCOM offset = 0V */
-1, VCMOFSET, 0x20,
write_reg(par, VCMOFSET, 0x20);
/*
* AVDD = 6.8V
* AVCL = -4.8V
* VDS = 2.3V
*/
-1, PWCTRL1, 0xA4, 0xA1,
write_reg(par, PWCTRL1, 0xA4, 0xA1);
-1, MIPI_DCS_SET_DISPLAY_ON,
-3,
};
write_reg(par, MIPI_DCS_SET_DISPLAY_ON);
return 0;
}
/**
* set_var() - apply LCD properties like rotation and BGR mode
@ -237,11 +242,11 @@ static struct fbtft_display display = {
.regwidth = 8,
.width = 240,
.height = 320,
.init_sequence = default_init_sequence,
.gamma_num = 2,
.gamma_len = 14,
.gamma = DEFAULT_GAMMA,
.fbtftops = {
.init_display = init_display,
.set_var = set_var,
.set_gamma = set_gamma,
.blank = blank,