[PATCH v3 15/29] media: iris: implement subscribe_event and unsubscribe_event ioctls

Dikshita Agarwal via B4 Relay
2024-08-27T10:06:35Z

From: Vedang Nagar <quic_vnagar@quicinc.com>

Implement subscribe_event and unsubscribe_event ioctls in the
driver with necessary hooks.

Signed-off-by: Vedang Nagar <quic_vnagar@quicinc.com>
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
---
drivers/media/platform/qcom/iris/iris_instance.h | 2 ++
drivers/media/platform/qcom/iris/iris_vdec.c | 26 ++++++++++++++++++++
drivers/media/platform/qcom/iris/iris_vdec.h | 1 +
drivers/media/platform/qcom/iris/iris_vidc.c | 31 ++++++++++++++++++++++++
4 files changed, 60 insertions(+)

diff --git a/drivers/media/platform/qcom/iris/iris_instance.h b/drivers/media/platform/qcom/iris/iris_instance.h
index bb43119af352..d28b8fd7ec2f 100644
--- a/drivers/media/platform/qcom/iris/iris_instance.h
+++ b/drivers/media/platform/qcom/iris/iris_instance.h
@@ -30,6 +30,7 @@
* @once_per_session_set: boolean to set once per session property
* @m2m_dev: a reference to m2m device structure
* @m2m_ctx: a reference to m2m context structure
+ * @subscriptions: variable to hold current events subscriptions
*/

struct iris_inst {
@@ -48,6 +49,7 @@ struct iris_inst {
bool once_per_session_set;
struct v4l2_m2m_dev *m2m_dev;
struct v4l2_m2m_ctx *m2m_ctx;
+ unsigned int subscriptions;
};

#endif
diff --git a/drivers/media/platform/qcom/iris/iris_vdec.c b/drivers/media/platform/qcom/iris/iris_vdec.c
index a38903eefa1c..29c7e229c148 100644
--- a/drivers/media/platform/qcom/iris/iris_vdec.c
+++ b/drivers/media/platform/qcom/iris/iris_vdec.c
@@ -3,6 +3,7 @@
* Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/

+#include <media/v4l2-event.h>
#include <media/v4l2-mem2mem.h>

#include "iris_buffer.h"
@@ -13,6 +14,7 @@
#define DEFAULT_WIDTH 320
#define DEFAULT_HEIGHT 240
#define DEFAULT_CODEC_ALIGNMENT 16
+#define MAX_EVENTS 30

void iris_vdec_inst_init(struct iris_inst *inst)
{
@@ -207,3 +209,27 @@ int iris_vdec_s_fmt(struct iris_inst *inst, struct v4l2_format *f)

return ret;
}
+
+int iris_vdec_subscribe_event(struct iris_inst *inst, const struct v4l2_event_subscription *sub)
+{
+ int ret = 0;
+
+ switch (sub->type) {
+ case V4L2_EVENT_EOS:
+ ret = v4l2_event_subscribe(&inst->fh, sub, MAX_EVENTS, NULL);
+ inst->subscriptions |= V4L2_EVENT_EOS;
+ break;
+ case V4L2_EVENT_SOURCE_CHANGE:
+ ret = v4l2_src_change_event_subscribe(&inst->fh, sub);
+ inst->subscriptions |= V4L2_EVENT_SOURCE_CHANGE;
+ break;
+ case V4L2_EVENT_CTRL:
+ ret = v4l2_ctrl_subscribe_event(&inst->fh, sub);
+ inst->subscriptions |= V4L2_EVENT_CTRL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
diff --git a/drivers/media/platform/qcom/iris/iris_vdec.h b/drivers/media/platform/qcom/iris/iris_vdec.h
index eb8a1121ae92..707fff34bf4d 100644
--- a/drivers/media/platform/qcom/iris/iris_vdec.h
+++ b/drivers/media/platform/qcom/iris/iris_vdec.h
@@ -13,5 +13,6 @@ void iris_vdec_inst_deinit(struct iris_inst *inst);
int iris_vdec_enum_fmt(struct iris_inst *inst, struct v4l2_fmtdesc *f);
int iris_vdec_try_fmt(struct iris_inst *inst, struct v4l2_format *f);
int iris_vdec_s_fmt(struct iris_inst *inst, struct v4l2_format *f);
+int iris_vdec_subscribe_event(struct iris_inst *inst, const struct v4l2_event_subscription *sub);

#endif
diff --git a/drivers/media/platform/qcom/iris/iris_vidc.c b/drivers/media/platform/qcom/iris/iris_vidc.c
index 488be6afd999..141704512b3c 100644
--- a/drivers/media/platform/qcom/iris/iris_vidc.c
+++ b/drivers/media/platform/qcom/iris/iris_vidc.c
@@ -4,6 +4,7 @@
*/

#include <linux/pm_runtime.h>
+#include <media/v4l2-event.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-mem2mem.h>

@@ -402,6 +403,34 @@ static int iris_g_selection(struct file *filp, void *fh, struct v4l2_selection *
return ret;
}

+static int iris_subscribe_event(struct v4l2_fh *fh, const struct v4l2_event_subscription *sub)
+{
+ struct iris_inst *inst;
+ int ret;
+
+ inst = container_of(fh, struct iris_inst, fh);
+
+ mutex_lock(&inst->lock);
+ ret = iris_vdec_subscribe_event(inst, sub);
+ mutex_unlock(&inst->lock);
+
+ return ret;
+}
+
+static int iris_unsubscribe_event(struct v4l2_fh *fh, const struct v4l2_event_subscription *sub)
+{
+ struct iris_inst *inst;
+ int ret;
+
+ inst = container_of(fh, struct iris_inst, fh);
+
+ mutex_lock(&inst->lock);
+ ret = v4l2_event_unsubscribe(&inst->fh, sub);
+ mutex_unlock(&inst->lock);
+
+ return ret;
+}
+
static struct v4l2_file_operations iris_v4l2_file_ops = {
.owner = THIS_MODULE,
.open = iris_open,
@@ -427,6 +456,8 @@ static const struct v4l2_ioctl_ops iris_v4l2_ioctl_ops = {
.vidioc_enum_framesizes = iris_enum_framesizes,
.vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
.vidioc_g_selection = iris_g_selection,
+ .vidioc_subscribe_event = iris_subscribe_event,
+ .vidioc_unsubscribe_event = iris_unsubscribe_event,
};

void iris_init_ops(struct iris_core *core)

--
2.34.1