Commit f03c9b78 authored by Oliver Graute's avatar Oliver Graute Committed by Greg Kroah-Hartman
Browse files

staging: fbtft: fb_st7789v: Initialize the Display 



Set Gamma Values and Register Values for the HSD20_IPS Panel

Signed-off-by: default avatarOliver Graute <oliver.graute@kococonnector.com>
Link: https://lore.kernel.org/r/1589380299-21871-1-git-send-email-oliver.graute@gmail.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ec269f12

drivers/staging/fbtft/fb_st7789v.c

+27 −5
Original line number Diff line number Diff line
@@ -20,6 +20,12 @@ 
	"70 2C 2E 15 10 09 48 33 53 0B 19 18 20 25\n" \

	"70 2C 2E 15 10 09 48 33 53 0B 19 18 20 25"



#define HSD20_IPS_GAMMA \

	"D0 05 0A 09 08 05 2E 44 45 0F 17 16 2B 33\n" \

	"D0 05 0A 09 08 05 2E 43 45 0F 16 16 2B 33"



#define HSD20_IPS "true"



/**

 * enum st7789v_command - ST7789V display controller commands

 *
@@ -82,13 +88,19 @@ static int init_display(struct fbtft_par *par) 


	/* set pixel format to RGB-565 */

	write_reg(par, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);

	if (HSD20_IPS)

		write_reg(par, PORCTRL, 0x05, 0x05, 0x00, 0x33, 0x33);



	else

		write_reg(par, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22);



	/*

	 * VGH = 13.26V

	 * VGL = -10.43V

	 */

	if (HSD20_IPS)

		write_reg(par, GCTRL, 0x75);

	else

		write_reg(par, GCTRL, 0x35);



	/*
@@ -101,12 +113,18 @@ static int init_display(struct fbtft_par *par) 
	 * VAP =  4.1V + (VCOM + VCOM offset + 0.5 * VDV)

	 * VAN = -4.1V + (VCOM + VCOM offset + 0.5 * VDV)

	 */

	if (HSD20_IPS)

		write_reg(par, VRHS, 0x13);

	else

		write_reg(par, VRHS, 0x0B);



	/* VDV = 0V */

	write_reg(par, VDVS, 0x20);



	/* VCOM = 0.9V */

	if (HSD20_IPS)

		write_reg(par, VCOMS, 0x22);

	else

		write_reg(par, VCOMS, 0x20);



	/* VCOM offset = 0V */
@@ -120,6 +138,10 @@ static int init_display(struct fbtft_par *par) 
	write_reg(par, PWCTRL1, 0xA4, 0xA1);



	write_reg(par, MIPI_DCS_SET_DISPLAY_ON);



	if (HSD20_IPS)

		write_reg(par, MIPI_DCS_ENTER_INVERT_MODE);



	return 0;

}
@@ -234,7 +256,7 @@ static struct fbtft_display display = { 
	.height = 320,

	.gamma_num = 2,

	.gamma_len = 14,

	.gamma = DEFAULT_GAMMA,

	.gamma = HSD20_IPS_GAMMA,

	.fbtftops = {

		.init_display = init_display,

		.set_var = set_var,