From 06d690f092db28a7c83c9524010c42136e2bb37f Mon Sep 17 00:00:00 2001 From: Todor Tomov Date: Wed, 25 Jul 2018 12:38:23 -0400 Subject: [PATCH] media: camss: vfe: Do not disable CAMIF when clearing its status Use "no change" value when clearing CAMIF status and make sure this is done before configuring the new command. Signed-off-by: Todor Tomov Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/platform/qcom/camss/camss-vfe.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c index 77167f1..15a1a01 100644 --- a/drivers/media/platform/qcom/camss/camss-vfe.c +++ b/drivers/media/platform/qcom/camss/camss-vfe.c @@ -156,6 +156,7 @@ #define VFE_0_CAMIF_CMD 0x2f4 #define VFE_0_CAMIF_CMD_DISABLE_FRAME_BOUNDARY 0 #define VFE_0_CAMIF_CMD_ENABLE_FRAME_BOUNDARY 1 +#define VFE_0_CAMIF_CMD_NO_CHANGE 3 #define VFE_0_CAMIF_CMD_CLEAR_CAMIF_STATUS (1 << 2) #define VFE_0_CAMIF_CFG 0x2f8 #define VFE_0_CAMIF_CFG_VFE_OUTPUT_EN (1 << 6) @@ -1021,8 +1022,10 @@ static void vfe_set_camif_cfg(struct vfe_device *vfe, struct vfe_line *line) static void vfe_set_camif_cmd(struct vfe_device *vfe, u32 cmd) { - writel_relaxed(VFE_0_CAMIF_CMD_CLEAR_CAMIF_STATUS, + writel_relaxed(VFE_0_CAMIF_CMD_CLEAR_CAMIF_STATUS | + VFE_0_CAMIF_CMD_NO_CHANGE, vfe->base + VFE_0_CAMIF_CMD); + wmb(); writel_relaxed(cmd, vfe->base + VFE_0_CAMIF_CMD); } -- 2.7.4