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Lin" , Houlong Wei , , , , Subject: [PATCH v5 06/10] soc: mediatek: cmdq: Add cmdq_pkt_finalize_loop for looping cmd with irq Date: Wed, 3 Apr 2024 18:25:58 +0800 Message-ID: <20240403102602.32155-7-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240403102602.32155-1-shawn.sung@mediatek.com> References: <20240403102602.32155-1-shawn.sung@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240403_112647_787183_C00AA0CA X-CRM114-Status: GOOD ( 13.51 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org From: "Jason-JH.Lin" 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 Signed-off-by: Hsiao Chien Sung --- drivers/soc/mediatek/mtk-cmdq-helper.c | 23 +++++++++++++++++++++++ include/linux/soc/mediatek/mtk-cmdq.h | 8 ++++++++ 2 files changed, 31 insertions(+) diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c index 42a0194198d5b..3e5a9c4592fd0 100644 --- a/drivers/soc/mediatek/mtk-cmdq-helper.c +++ b/drivers/soc/mediatek/mtk-cmdq-helper.c @@ -568,6 +568,29 @@ 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; diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h index 7bd77d40a5720..f986117d930c0 100644 --- a/include/linux/soc/mediatek/mtk-cmdq.h +++ b/include/linux/soc/mediatek/mtk-cmdq.h @@ -371,6 +371,14 @@ 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