For HDMI, WBDELAYCOUNT starts counting at the start of vsync, not at the start of vfp.
This patch adjusts the wbdelay for HDMI accordingly.
Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- drivers/gpu/drm/omapdrm/dss/dispc.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c index ccfafce1ea89..7398039954a5 100644 --- a/drivers/gpu/drm/omapdrm/dss/dispc.c +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c @@ -2816,8 +2816,12 @@ int dispc_wb_setup(struct dispc_device *dispc, } else { int wbdelay;
- wbdelay = min(vm->vfront_porch + - vm->vsync_len + vm->vback_porch, (u32)255); + if (channel_in == DSS_WB_TV_MGR) + wbdelay = min(vm->vsync_len + vm->vback_porch, + (u32)255); + else + wbdelay = min(vm->vfront_porch + + vm->vsync_len + vm->vback_porch, (u32)255);
/* WBDELAYCOUNT */ REG_FLD_MOD(dispc, DISPC_OVL_ATTRIBUTES2(plane), wbdelay, 7, 0);