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 --- drivers/gpu/drm/radeon/radeon_display.c | 20 +++++++++++++------- 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 283beed..12a5414 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);