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[13/32] media: camss: vfe: Do not disable CAMIF when clearing its status

Message ID 1529681621-9682-14-git-send-email-todor.tomov@linaro.org
State Superseded
Headers show
Series Qualcomm Camera Subsystem driver - 8x96 support | expand

Commit Message

Todor Tomov June 22, 2018, 3:33 p.m. UTC 
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(-)

-- 
2.7.4
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Patch

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);
 }