Vertical blanking needs to be halved on interlace modes. WBDELAYCOUNT
was calculated without such halving, resulting in WBUNCOMPLETE errors.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Acked-by: Benoit Parrot <bparrot@xxxxxx>
---
drivers/gpu/drm/omapdrm/dss/dispc.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
index 669ee9df224b..99bbc97d0de4 100644
--- a/drivers/gpu/drm/omapdrm/dss/dispc.c
+++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
@@ -2710,14 +2710,18 @@ int dispc_wb_setup(const struct omap_dss_writeback_info *wi,
/* WBDELAYCOUNT */
REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), 0, 7, 0);
} else {
- int wbdelay;
+ u32 wbdelay;
if (channel_in == DSS_WB_TV_MGR)
- wbdelay = min(vm->vsync_len + vm->vback_porch,
- (u32)255);
+ wbdelay = vm->vsync_len + vm->vback_porch;
else
- wbdelay = min(vm->vfront_porch +
- vm->vsync_len + vm->vback_porch, (u32)255);
+ wbdelay = vm->vfront_porch + vm->vsync_len +
+ vm->vback_porch;
+
+ if (vm->flags & DISPLAY_FLAGS_INTERLACED)
+ wbdelay /= 2;
+
+ wbdelay = min(wbdelay, 255u);
/* WBDELAYCOUNT */
REG_FLD_MOD(DISPC_OVL_ATTRIBUTES2(plane), wbdelay, 7, 0);
--
Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/dri-devel
