media: iris: introduce iris core state management with shared queues

Introduce a core state management for iris driver with the necessary
queues needed for the host firmware communication.

There are 3 types of queues:
Command queue - driver to write any command to firmware.
Message queue - firmware to send any response to the driver.
Debug queue - for the firmware to write debug messages.
Initialize and configure the shared queues during probe.

Different states for core:
IRIS_CORE_DEINIT - default state.
IRIS_CORE_INIT   - core state with core initialized. FW loaded and HW
                   brought out of reset, shared queues established
                   between host driver and firmware.
IRIS_CORE_ERROR  - error state.
      -----------
           |
           V
       -----------
       | DEINIT  |
       -----------
           ^
          / \
         /   \
        /     \
       /       \
      v         v
 -----------   ----------.
 |  INIT  |-->|  ERROR  |
 -----------   ----------.

Tested-by: Stefan Schmidt <[email protected]> # x1e80100 (Dell XPS 13 9345)
Reviewed-by: Stefan Schmidt <[email protected]>
Tested-by: Neil Armstrong <[email protected]> # on SM8550-QRD
Tested-by: Neil Armstrong <[email protected]> # on SM8550-HDK
Signed-off-by: Dikshita Agarwal <[email protected]>
Signed-off-by: Hans Verkuil <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/media/platform/qcom/iris/iris_vidc.c b/drivers/media/platform/qcom/iris/iris_vidc.c
index e91d661c6280..5dd0ccbaa2fb 100644
--- a/drivers/media/platform/qcom/iris/iris_vidc.c
+++ b/drivers/media/platform/qcom/iris/iris_vidc.c
@@ -81,6 +81,12 @@ int iris_open(struct file *filp)
 	struct iris_inst *inst;
 	int ret;
 
+	ret = iris_core_init(core);
+	if (ret) {
+		dev_err(core->dev, "core init failed\n");
+		return ret;
+	}
+
 	inst = core->iris_platform_data->get_instance();
 	if (!inst)
 		return -ENOMEM;