From: Bich Hemon <bich.he...@st.com>
Compensate delay introduced by AWG IP during DE generation
Signed-off-by: Bich Hemon <bich.hemon at st.com>
Reviewed-by: Vincent ABRIOU <vincent.abriou at st.com>
---
drivers/gpu/drm/sti/sti_awg_utils.c | 4 +++-
drivers/gpu/drm/sti/sti_vtg.c | 2 +-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sti/sti_awg_utils.c
b/drivers/gpu/drm/sti/sti_awg_utils.c
index a516eb8..2da7d68 100644
--- a/drivers/gpu/drm/sti/sti_awg_utils.c
+++ b/drivers/gpu/drm/sti/sti_awg_utils.c
@@ -6,6 +6,8 @@
#include "sti_awg_utils.h"
+#define AWG_DELAY (-5)
+
#define AWG_OPCODE_OFFSET 10
#define AWG_MAX_ARG 0x3ff
@@ -125,7 +127,7 @@ static int awg_generate_line_signal(
val = timing->blanking_level;
ret |= awg_generate_instr(RPLSET, val, 0, 0, fwparams);
- val = timing->trailing_pixels - 1;
+ val = timing->trailing_pixels - 1 + AWG_DELAY;
ret |= awg_generate_instr(SKIP, val, 0, 0, fwparams);
}
diff --git a/drivers/gpu/drm/sti/sti_vtg.c b/drivers/gpu/drm/sti/sti_vtg.c
index 6bf4ce4..957ce71 100644
--- a/drivers/gpu/drm/sti/sti_vtg.c
+++ b/drivers/gpu/drm/sti/sti_vtg.c
@@ -65,7 +65,7 @@
#define HDMI_DELAY (5)
/* Delay introduced by the DVO in nb of pixel */
-#define DVO_DELAY (2)
+#define DVO_DELAY (7)
/* delay introduced by the Arbitrary Waveform Generator in nb of pixels */
#define AWG_DELAY_HD (-9)
--
1.9.1
