[PATCH] venus: venc: Add VIDIOC_TRY_ENCODER_CMD support

[Fritz Koenig]

V4L2_ENC_CMD_STOP and V4L2_ENC_CMD_START are already
supported.  Add a way to query for support.

---
 drivers/media/platform/qcom/venus/venc.c | 26 ++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/media/platform/qcom/venus/venc.c 
b/drivers/media/platform/qcom/venus/venc.c
index 2ddfeddf98514..e05db3c4bfb24 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -507,6 +507,27 @@ static int venc_enum_frameintervals(struct file *file, 
void *fh,
        return 0;
 }
 
+static int
+venc_try_encoder_cmd(struct file *file, void *fh, struct v4l2_encoder_cmd *cmd)
+{
+       struct venus_inst *inst = to_inst(file);
+       struct device *dev = inst->core->dev_dec;
+
+       switch (cmd->cmd) {
+       case V4L2_ENC_CMD_STOP:
+       case V4L2_ENC_CMD_START:
+               if (cmd->flags != 0) {
+                       dev_dbg(dev, "flags=%u are not supported", cmd->flags);
+                       return -EINVAL;
+               }
+               break;
+       default:
+               return -EINVAL;
+       }
+
+       return 0;
+}
+
 static int
 venc_encoder_cmd(struct file *file, void *fh, struct v4l2_encoder_cmd *cmd)
 {
@@ -514,6 +535,10 @@ venc_encoder_cmd(struct file *file, void *fh, struct 
v4l2_encoder_cmd *cmd)
        struct hfi_frame_data fdata = {0};
        int ret = 0;
 
+       ret = venc_try_encoder_cmd(file, fh, cmd);
+       if (ret < 0)
+               return ret;
+
        ret = v4l2_m2m_ioctl_try_encoder_cmd(file, fh, cmd);
        if (ret)
                return ret;
@@ -575,6 +600,7 @@ static const struct v4l2_ioctl_ops venc_ioctl_ops = {
        .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
        .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
        .vidioc_encoder_cmd = venc_encoder_cmd,
+       .vidioc_try_encoder_cmd = venc_try_encoder_cmd,
 };
 
 static int venc_set_properties(struct venus_inst *inst)
-- 
2.29.2.454.gaff20da3a2-goog