From: Takashi Iwai <tiwai@suse.com>
Date: Wed, 17 Jul 2013 13:07:26 +0000 (+0200)
Subject: drm/mgag200: Fix framebuffer pitch calculation
X-Git-Url: https://rtime.felk.cvut.cz/gitweb/linux-imx.git/commitdiff_plain/da55839870263563cc70e700a7f58090a860576d

drm/mgag200: Fix framebuffer pitch calculation

The framebuffer pitch calculation needs to be done differently for bpp == 24
- check xf86-video-mga for reference.

Signed-off-by: Egbert Eich <eich@suse.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 020a62377ff0..c8983f92bc67 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -877,7 +877,7 @@ static int mga_crtc_mode_set(struct drm_crtc *crtc,
 
 	pitch = crtc->fb->pitches[0] / (crtc->fb->bits_per_pixel / 8);
 	if (crtc->fb->bits_per_pixel == 24)
-		pitch = pitch >> (4 - bppshift);
+		pitch = (pitch * 3) >> (4 - bppshift);
 	else
 		pitch = pitch >> (4 - bppshift);