From: Geert Uytterhoeven <geert@linux-m68k.org>
Date: Mon, 11 Jul 2022 15:50:28 +0000 (+0200)
Subject: video: fbdev: atari: Fix ext_setcolreg()
X-Git-Tag: v6.1-rc5~667^2~19
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=35fa155e836833fdd5744c5237aca7e2c2c31e03;p=platform%2Fkernel%2Flinux-starfive.git

video: fbdev: atari: Fix ext_setcolreg()

The red, green, and blue color values are 16-bit, while the external
graphics hardware registers are 8-bit.
Add the missing conversion from 16-bit to 8-bit.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
---

diff --git a/drivers/video/fbdev/atafb.c b/drivers/video/fbdev/atafb.c
index 39c3b860..a36cd8f 100644
--- a/drivers/video/fbdev/atafb.c
+++ b/drivers/video/fbdev/atafb.c
@@ -2206,6 +2206,10 @@ static int ext_setcolreg(unsigned int regno, unsigned int red,
 	if (regno > 255)
 		return 1;
 
+	red >>= 8;
+	green >>= 8;
+	blue >>= 8;
+
 	switch (external_card_type) {
 	case IS_VGA:
 		OUTB(0x3c8, regno);