GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-22 14:41:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

drm/radeon/kms: fix calculation of h/v scaling factors

Browse source 
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>
This commit is contained in:
Alex Deucher 2010-08-03 19:58:49 -04:00 • committed by Dave Airlie
parent fa0a6024da
commit d65d65b175
1 changed files with 13 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

20
drivers/gpu/drm/radeon/radeon_display.c
View file

@ -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_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct radeon_encoder *radeon_encoder; struct radeon_encoder *radeon_encoder;
bool first = true; 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) { list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
radeon_encoder = to_radeon_encoder(encoder);
if (encoder->crtc != crtc) if (encoder->crtc != crtc)
continue; continue;
radeon_encoder = to_radeon_encoder(encoder);
if (first) { if (first) {
/* set scaling */ /* set scaling */
if (radeon_encoder->rmx_type == RMX_OFF) 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; radeon_crtc->rmx_type = radeon_encoder->rmx_type;
else else
radeon_crtc->rmx_type = RMX_OFF; 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 */ /* copy native mode */
memcpy(&radeon_crtc->native_mode, memcpy(&radeon_crtc->native_mode,
&radeon_encoder->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) { if (radeon_crtc->rmx_type != radeon_encoder->rmx_type) {
/* WARNING: Right now this can't happen but /* WARNING: Right now this can't happen but
* in the future we need to check that scaling * 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 * (ie all encoder can work with the same
* scaling). * scaling).
*/ */
DRM_ERROR("Scaling not consistent accross encoder.\n"); DRM_ERROR("Scaling not consistent across encoder.\n");
return false; return false;
} }
} }
} }
if (radeon_crtc->rmx_type != RMX_OFF) { if (radeon_crtc->rmx_type != RMX_OFF) {
fixed20_12 a, b; fixed20_12 a, b;
a.full = dfixed_const(crtc->mode.vdisplay); a.full = dfixed_const(src_v);
b.full = dfixed_const(radeon_crtc->native_mode.hdisplay); b.full = dfixed_const(dst_v);
radeon_crtc->vsc.full = dfixed_div(a, b); radeon_crtc->vsc.full = dfixed_div(a, b);
a.full = dfixed_const(crtc->mode.hdisplay); a.full = dfixed_const(src_h);
b.full = dfixed_const(radeon_crtc->native_mode.vdisplay); b.full = dfixed_const(dst_h);
radeon_crtc->hsc.full = dfixed_div(a, b); radeon_crtc->hsc.full = dfixed_div(a, b);
} else { } else {
radeon_crtc->vsc.full = dfixed_const(1); radeon_crtc->vsc.full = dfixed_const(1);