linux-kernel - [PATCH v1] staging: fbtft: fb_st7789v: Initialize the Display

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Date:   Thu,  9 Apr 2020 11:25:32 +0200
From:   Oliver Graute <oliver.graute@...il.com>
To:     gregkh@...uxfoundation.org
Cc:     oliver.graute@...il.com,
        Oliver Graute <oliver.graute@...oconnector.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1] staging: fbtft: fb_st7789v: Initialize the Display

From: Oliver Graute <oliver.graute@...oconnector.com>

Set Gamma Values and Register Values for the HSD20_IPS

Signed-off-by: Oliver Graute <oliver.graute@...oconnector.com>
---
 drivers/staging/fbtft/fb_st7789v.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/fbtft/fb_st7789v.c b/drivers/staging/fbtft/fb_st7789v.c
index 84c5af2dc9a0..b0aa96b703a8 100644
--- a/drivers/staging/fbtft/fb_st7789v.c
+++ b/drivers/staging/fbtft/fb_st7789v.c
@@ -17,8 +17,8 @@
 #define DRVNAME "fb_st7789v"
 
 #define DEFAULT_GAMMA \
-	"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"
+	"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"
 
 /**
  * enum st7789v_command - ST7789V display controller commands
@@ -83,13 +83,13 @@ 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);
 
-	write_reg(par, PORCTRL, 0x08, 0x08, 0x00, 0x22, 0x22);
+	write_reg(par, PORCTRL, 0x05, 0x05, 0x00, 0x33, 0x33);
 
 	/*
 	 * VGH = 13.26V
 	 * VGL = -10.43V
 	 */
-	write_reg(par, GCTRL, 0x35);
+	write_reg(par, GCTRL, 0x75);
 
 	/*
 	 * VDV and VRH register values come from command write
@@ -101,13 +101,13 @@ 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);
+	write_reg(par, VRHS, 0x13);
 
 	/* VDV = 0V */
 	write_reg(par, VDVS, 0x20);
 
 	/* VCOM = 0.9V */
-	write_reg(par, VCOMS, 0x20);
+	write_reg(par, VCOMS, 0x22);
 
 	/* VCOM offset = 0V */
 	write_reg(par, VCMOFSET, 0x20);
-- 
2.17.1