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[04/10] video: fbdev: atari: Fix ext_setcolreg()

Message ID f807e1c6deedb2b819a309347295b0fd2f89c2c2.1657554353.git.geert@linux-m68k.org (mailing list archive)
State New, archived
Headers show
Series video: fbdev: atari: Miscellaneous fixes and cleanups | expand

Commit Message

Geert Uytterhoeven July 11, 2022, 3:50 p.m. UTC
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>
---
Untested due to lack of hardware.
---
 drivers/video/fbdev/atafb.c | 4 ++++
 1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/video/fbdev/atafb.c b/drivers/video/fbdev/atafb.c
index 39c3b860a797d4bc..a36cd8f1f4200dd5 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);