From: Oliver Graute oliver.graute@kococonnector.com

Set Gamma Values and Register Values for the HSD20_IPS Panel

Signed-off-by: Oliver Graute oliver.graute@kococonnector.com ---

need information howto set HSD20_IPS Panel at run time and not at compile time

Changes for v2: - added define for HSD20_IPS_GAMMA values - check for HSD20_IPS define - enabled MIPI_DCS_ENTER_INVERT_MODE

drivers/staging/fbtft/fb_st7789v.c | 32 +++++++++++++++++++++++++----- 1 file changed, 27 insertions(+), 5 deletions(-)

diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c index 3c3f387936e8..ebc17e05ecd0 100644 --- a/drivers/staging/fbtft/fb_st7789v.c +++ b/drivers/staging/fbtft/fb_st7789v.c @@ -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 * @@ -82,14 +88,20 @@ 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);

- write_reg(par, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22); + else + write_reg(par, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22);

/* * VGH = 13.26V * VGL = -10.43V */ - write_reg(par, GCTRL, 0x35); + if (HSD20_IPS) + write_reg(par, GCTRL, 0x75); + else + write_reg(par, GCTRL, 0x35);

/* * VDV and VRH register values come from command write @@ -101,13 +113,19 @@ 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) */ - write_reg(par, VRHS, 0x0B); + if (HSD20_IPS) + write_reg(par, VRHS, 0x13); + else + write_reg(par, VRHS, 0x0B);

/* VDV = 0V */ write_reg(par, VDVS, 0x20);

/* VCOM = 0.9V */ - write_reg(par, VCOMS, 0x20); + if (HSD20_IPS) + write_reg(par, VCOMS, 0x22); + else + write_reg(par, VCOMS, 0x20);

/* VCOM offset = 0V */ write_reg(par, VCMOFSET, 0x20); @@ -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,