@@ -475,6 +475,29 @@ int cmdq_pkt_finalize(struct cmdq_pkt *pkt)
}
EXPORT_SYMBOL(cmdq_pkt_finalize);
+int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt)
+{
+ struct cmdq_instruction inst = { {0} };
+ int err;
+
+ /* insert EOC and generate IRQ for each command iteration */
+ inst.op = CMDQ_CODE_EOC;
+ inst.value = CMDQ_EOC_IRQ_EN;
+ err = cmdq_pkt_append_command(pkt, inst);
+ if (err < 0)
+ return err;
+
+ /* JUMP to start of pkt */
+ err = cmdq_pkt_jump(pkt, pkt->pa_base);
+ if (err < 0)
+ return err;
+
+ pkt->loop = true;
+
+ return err;
+}
+EXPORT_SYMBOL(cmdq_pkt_finalize_loop);
+
int cmdq_pkt_flush_async(struct cmdq_pkt *pkt)
{
int err;
@@ -329,6 +329,14 @@ int cmdq_pkt_jump(struct cmdq_pkt *pkt, dma_addr_t addr);
*/
int cmdq_pkt_finalize(struct cmdq_pkt *pkt);
+/**
+ * cmdq_pkt_finalize_loop() - Append EOC and jump to start command.
+ * @pkt: the CMDQ packet
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt);
+
/**
* cmdq_pkt_flush_async() - trigger CMDQ to asynchronously execute the CMDQ
* packet and call back at the end of done packet
Add cmdq_pkt_finalize_loop to CMDQ driver. cmdq_pkt_finalize_loop appends end of command(EOC) instruction and jump to start of command buffer instruction to make the command buffer loopable. Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com> --- drivers/soc/mediatek/mtk-cmdq-helper.c | 23 +++++++++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 8 ++++++++ 2 files changed, 31 insertions(+)