HDMI analyzer tests showed that Vsync and Hsync signal were not
compliant with the HDMI protocol.
HDMI_DELAY should be taken into account in the VTG Vsync
programming to reflect the 6 pixels shift introduced in the VTG
Hsync programming.
Signed-off-by: Vincent Abriou <vincent.abriou at st.com>
---
drivers/gpu/drm/sti/sti_vtg.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sti/sti_vtg.c b/drivers/gpu/drm/sti/sti_vtg.c
index eda62c8..d21df0d 100644
--- a/drivers/gpu/drm/sti/sti_vtg.c
+++ b/drivers/gpu/drm/sti/sti_vtg.c
@@ -151,8 +151,11 @@ static void vtg_set_mode(struct sti_vtg *vtg,
tmp |= 1;
writel(tmp, vtg->regs + VTG_TOP_V_VD_1);
writel(tmp, vtg->regs + VTG_BOT_V_VD_1);
- writel(0, vtg->regs + VTG_TOP_V_HD_1);
- writel(0, vtg->regs + VTG_BOT_V_HD_1);
+
+ tmp = HDMI_DELAY << 16;
+ tmp |= HDMI_DELAY;
+ writel(tmp, vtg->regs + VTG_TOP_V_HD_1);
+ writel(tmp, vtg->regs + VTG_BOT_V_HD_1);
/* prepare VTG set 2 for for HD DCS */
tmp = (mode->hsync_end - mode->hsync_start) << 16;
--
1.9.1
