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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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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); =20 +int cmdq_pkt_finalize_loop(struct cmdq_pkt *pkt) +{ + struct cmdq_instruction inst =3D { {0} }; + int err; + + /* insert EOC and generate IRQ for each command iteration */ + inst.op =3D CMDQ_CODE_EOC; + inst.value =3D CMDQ_EOC_IRQ_EN; + err =3D cmdq_pkt_append_command(pkt, inst); + if (err < 0) + return err; + + /* JUMP to start of pkt */ + err =3D cmdq_pkt_jump(pkt, pkt->pa_base); + if (err < 0) + return err; + + pkt->loop =3D 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/medi= atek/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 add= r); */ int cmdq_pkt_finalize(struct cmdq_pkt *pkt); =20 +/** + * 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 --=20 2.18.0