linux-kernel - [PATCH] venus: venc: Add VIDIOC_TRY_ENCODER

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Date:   Sun, 29 Nov 2020 06:05:18 +0000
From:   Fritz Koenig <frkoenig@...omium.org>
To:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, stanimir.varbanov@...aro.org,
        vgarodia@...eaurora.org, dikshita@...eaurora.org,
        acourbot@...omium.org
Cc:     Fritz Koenig <frkoenig@...omium.org>
Subject: [PATCH] venus: venc: Add VIDIOC_TRY_ENCODER_CMD support

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