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.valkei...@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 7f9186894bd5..669ee9df224b 100644
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -2712,8 +2712,12 @@ int dispc_wb_setup(const struct omap_dss_writeback_info
*wi,
} 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_OVL_ATTRIBUTES2(plane), wbdelay, 7, 0);
--
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