media: iris: Allow stop on firmware only if start was issued.

For HFI Gen1, the instances substate is changed to LOAD_RESOURCES only
when a START command is issues to the firmware. If STOP is called
without a prior START, the firmware may reject the command and throw
some erros.
Handle this by adding a substate check before issuing STOP command to
the firmware.

Fixes: 11712ce70f8e ("media: iris: implement vb2 streaming ops")
Cc: stable@vger.kernel.org
Reviewed-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Tested-by: Vikash Garodia <quic_vgarodia@quicinc.com> # X1E80100
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-HDK
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # x1e80100-crd
Signed-off-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

diff --git a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
index 3e41c8cb620ebe51636a4cc5202909bb043ed4ab..a3461ccf170ab1abb3a9ce70c4d93415773b2772 100644 (file)
--- a/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
+++ b/drivers/media/platform/qcom/iris/iris_hfi_gen1_command.c
@@ -202,7 +202,7 @@ static int iris_hfi_gen1_session_stop(struct iris_inst *inst, u32 plane)
                        inst->flush_responses_pending++;
                        ret = iris_wait_for_session_response(inst, true);
                }
-       } else {
+       } else if (inst->sub_state & IRIS_INST_SUB_LOAD_RESOURCES) {
                reinit_completion(&inst->completion);
                iris_hfi_gen1_packet_session_cmd(inst, &pkt, HFI_CMD_SESSION_STOP);
                ret = iris_hfi_queue_cmd_write(core, &pkt, pkt.shdr.hdr.size);