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@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;