According to the datasheet of the panel, both data, DEN and sync signals
are expected to be driven on the falling edge of the DOTCLK.

Signed-off-by: Peter Ujfalusi <peter.ujfal...@ti.com>
---
 drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c 
b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
index f78102aab2e6..0787dba44faa 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-tpo-td043mtea1.c
@@ -89,6 +89,10 @@ static const struct videomode tpo_td043_vm = {
        .flags          = DISPLAY_FLAGS_HSYNC_LOW | DISPLAY_FLAGS_VSYNC_LOW |
                          DISPLAY_FLAGS_DE_HIGH | DISPLAY_FLAGS_SYNC_POSEDGE |
                          DISPLAY_FLAGS_PIXDATA_NEGEDGE,
+       /*
+        * Note: According to the panel documentation:
+        * SYNC needs to be driven on the FALLING edge
+        */
 };
 
 #define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
-- 
2.10.0

Reply via email to