[PATCH 1/3] media: iris: Skip redundant decoder input config params

[Vishnu Reddy <busanna.reddy@oss.qualcomm.com>]

The decoder input configuration parameters are sent to the firmware every
time the output plane is streamed on. This includes streamon after a seek.
Resending these parameters generates a port settings change (PSC) event
even when the input configuration has not changed. The client then
receives a redundant resolution change notification on every seek. A seek
hang was observed when redundant PSC events were generated for the same
configuration.

Skip sending decoder input configuration parameters once the input port
properties have been programmed. Reuse the existing ipsc_properties_set
state which tracks whether the input port subscription and properties have
been configured. This prevents redundant PSC events during seek operations
and avoids unnecessary resolution change notifications to the client.

Fixes: 025398e9121c ("media: iris: subscribe parameters and properties to firmware for hfi_gen2")
Cc: stable@vger.kernel.org
Signed-off-by: Vishnu Reddy <busanna.reddy@oss.qualcomm.com>
---
 drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
index 388a36ff2b07b..fac61ece177e9 100644
--- a/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
+++ b/drivers/media/platform/qcom/iris/iris_hfi_gen2_command.c
@@ -668,6 +668,7 @@ static int iris_hfi_gen2_set_super_block(struct iris_inst *inst, u32 plane)
 static int iris_hfi_gen2_session_set_config_params(struct iris_inst *inst, u32 plane)
 {
 	const struct iris_firmware_data *fdata = inst->core->iris_firmware_data;
+	struct iris_inst_hfi_gen2 *inst_hfi_gen2 = to_iris_inst_hfi_gen2(inst);
 	u32 config_params_size = 0, i, j;
 	const u32 *config_params = NULL;
 	int ret;
@@ -693,6 +694,10 @@ static int iris_hfi_gen2_session_set_config_params(struct iris_inst *inst, u32 p
 		{HFI_PROP_AV1_SUPER_BLOCK_ENABLED,    iris_hfi_gen2_set_super_block            },
 	};
 
+	if (inst->domain == DECODER && V4L2_TYPE_IS_OUTPUT(plane) &&
+	    inst_hfi_gen2->ipsc_properties_set)
+		return 0;
+
 	if (inst->domain == DECODER) {
 		if (V4L2_TYPE_IS_OUTPUT(plane)) {
 			if (inst->codec == V4L2_PIX_FMT_H264) {

-- 
2.34.1