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Subject[PATCH v3 14/35] media: camss: vfe: Do not disable CAMIF when clearing its status
Date
Use "no change" value when clearing CAMIF status and make sure
this is done before configuring the new command.

Signed-off-by: Todor Tomov <todor.tomov@linaro.org>
---
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
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