[PATCH 1/7] media: rzv2h-ivc: Revise default VBLANK formula

[Jacopo Mondi]

From: Daniel Scally <dan.scally+renesas@xxxxxxxxxxxxxxxx>

The vertical blanking settings for the IVC block are dependent on
settings in the ISP. This was originally set to calculate as the
worst-case possible value, but it seems that this can cause the IVC
block to hang. Instead calculate the vblank to match the default
settings (which are currently all the driver sets anyway).

Cc: stable@xxxxxxxxxxxxxxx
Fixes: f0b3984d821b ("media: platform: Add Renesas Input Video Control block driver")
Signed-off-by: Daniel Scally <dan.scally+renesas@xxxxxxxxxxxxxxxx>
Signed-off-by: Jacopo Mondi <jacopo.mondi+renesas@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/renesas/rzv2h-ivc/rzv2h-ivc-video.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/renesas/rzv2h-ivc/rzv2h-ivc-video.c b/drivers/media/platform/renesas/rzv2h-ivc/rzv2h-ivc-video.c
index 799453250b85..1e016b17dcee 100644
--- a/drivers/media/platform/renesas/rzv2h-ivc/rzv2h-ivc-video.c
+++ b/drivers/media/platform/renesas/rzv2h-ivc/rzv2h-ivc-video.c
@@ -24,7 +24,7 @@
 #include <media/videobuf2-dma-contig.h>
 
 #define RZV2H_IVC_FIXED_HBLANK			0x20
-#define RZV2H_IVC_MIN_VBLANK(hts)		max(0x1b, 15 + (120501 / (hts)))
+#define RZV2H_IVC_MIN_VBLANK(hts)		max(0x1b, 70100 / (hts))
 
 struct rzv2h_ivc_buf {
 	struct vb2_v4l2_buffer vb;

-- 
2.53.0