diff mbox series

[17/24] drm/omap: fix WBDELAYCOUNT for HDMI

Message ID 1518428694-18018-18-git-send-email-tomi.valkeinen@ti.com
State Superseded
Headers show
Series drm/omap: misc patches | expand

Commit Message

Tomi Valkeinen Feb. 12, 2018, 9:44 a.m. UTC 
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 mbox series

Patch

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);