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authorAlex Deucher <alexdeucher@gmail.com>2010-08-03 19:58:49 -0400
committerDave Airlie <airlied@redhat.com>2010-08-04 10:03:47 +1000
commitd65d65b175a29bd7ea2bb69c046419329c4a5db7 (patch)
tree459fd50b7e4af59af71e0e93bd602c243209983d /drivers/gpu/drm/radeon/radeon_display.c
parentfa0a6024da61d96a12fab18991b9897292b43253 (diff)
drm/radeon/kms: fix calculation of h/v scaling factors
Prior to this patch the code was dividing the src_v by the dst_h and vice versa, rather than src_v/dst_v and src_h/dst_h. This could lead to problems in the calculation of the display watermarks. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_display.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_display.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 283beedc2cb..12a54145b64 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -1073,11 +1073,13 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct radeon_encoder *radeon_encoder;
bool first = true;
+ u32 src_v = 1, dst_v = 1;
+ u32 src_h = 1, dst_h = 1;
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
- radeon_encoder = to_radeon_encoder(encoder);
if (encoder->crtc != crtc)
continue;
+ radeon_encoder = to_radeon_encoder(encoder);
if (first) {
/* set scaling */
if (radeon_encoder->rmx_type == RMX_OFF)
@@ -1087,6 +1089,10 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
radeon_crtc->rmx_type = radeon_encoder->rmx_type;
else
radeon_crtc->rmx_type = RMX_OFF;
+ src_v = crtc->mode.vdisplay;
+ dst_v = radeon_crtc->native_mode.vdisplay;
+ src_h = crtc->mode.hdisplay;
+ dst_h = radeon_crtc->native_mode.vdisplay;
/* copy native mode */
memcpy(&radeon_crtc->native_mode,
&radeon_encoder->native_mode,
@@ -1096,22 +1102,22 @@ bool radeon_crtc_scaling_mode_fixup(struct drm_crtc *crtc,
if (radeon_crtc->rmx_type != radeon_encoder->rmx_type) {
/* WARNING: Right now this can't happen but
* in the future we need to check that scaling
- * are consistent accross different encoder
+ * are consistent across different encoder
* (ie all encoder can work with the same
* scaling).
*/
- DRM_ERROR("Scaling not consistent accross encoder.\n");
+ DRM_ERROR("Scaling not consistent across encoder.\n");
return false;
}
}
}
if (radeon_crtc->rmx_type != RMX_OFF) {
fixed20_12 a, b;
- a.full = dfixed_const(crtc->mode.vdisplay);
- b.full = dfixed_const(radeon_crtc->native_mode.hdisplay);
+ a.full = dfixed_const(src_v);
+ b.full = dfixed_const(dst_v);
radeon_crtc->vsc.full = dfixed_div(a, b);
- a.full = dfixed_const(crtc->mode.hdisplay);
- b.full = dfixed_const(radeon_crtc->native_mode.vdisplay);
+ a.full = dfixed_const(src_h);
+ b.full = dfixed_const(dst_h);
radeon_crtc->hsc.full = dfixed_div(a, b);
} else {
radeon_crtc->vsc.full = dfixed_const(1);