There's console font corruption when using the mach64 driver in 24bpp
mode.
In 24bpp mode, the mach64 accelerator is set up for 8-bpp mode (with
horizontal width and stride multiplied by 3). In this mode, the
accelerator can't even possibly support color expansion. Consquently, we
have to use an unaccelerated function cfb_imageblit for color expansion.
Signed-off-by: Mikulas Patocka <mpatocka@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
---
drivers/video/fbdev/aty/mach64_accel.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: linux-stable/drivers/video/fbdev/aty/mach64_accel.c
===================================================================
--- linux-stable.orig/drivers/video/fbdev/aty/mach64_accel.c 2018-04-20 18:11:01.000000000 +0200
+++ linux-stable/drivers/video/fbdev/aty/mach64_accel.c 2018-08-13 17:37:04.000000000 +0200
@@ -291,7 +291,8 @@ void atyfb_imageblit(struct fb_info *inf
if (!image->width || !image->height)
return;
if (!par->accel_flags ||
- (image->depth != 1 && info->var.bits_per_pixel != image->depth)) {
+ (image->depth != 1 && info->var.bits_per_pixel != image->depth) ||
+ (image->depth == 1 && info->var.bits_per_pixel == 24)) {
cfb_imageblit(info, image);
return;
}
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