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Thu, 14 Oct 2021 05:29:50 -0700 (PDT) Received: from fedora ([2803:9800:98c2:8470:9f4:8e2a:88e5:ec01]) by smtp.gmail.com with ESMTPSA id x125sm1589796vkc.25.2021.10.14.05.29.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Oct 2021 05:29:48 -0700 (PDT) Date: Thu, 14 Oct 2021 09:29:42 -0300 From: Ezequiel Garcia To: Yunfei Dong Cc: Alexandre Courbot , Hans Verkuil , Tzung-Bi Shih , Tiffany Lin , Andrew-CT Chen , Mauro Carvalho Chehab , Rob Herring , Matthias Brugger , Tomasz Figa , Hsin-Yi Wang , Fritz Koenig , Dafna Hirschfeld , Benjamin Gaignard , Daniel Vetter , dri-devel , Irui Wang , linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com Subject: Re: [PATCH v7, 11/15] media: mtk-vcodec: Add core thread Message-ID: References: <20211011070247.792-1-yunfei.dong@mediatek.com> <20211011070247.792-12-yunfei.dong@mediatek.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20211011070247.792-12-yunfei.dong@mediatek.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211014_052952_995840_27A537FF X-CRM114-Status: GOOD ( 28.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Yunfei, On Mon, Oct 11, 2021 at 03:02:43PM +0800, Yunfei Dong wrote: > Core thread: > 1. Gets lat_buf from core msg queue. > 2. Proceeds core decode. > 3. Puts the lat_buf back to lat msg queue. > > Both H264 and VP9 rely on the core thread. > Avoid the kthread API and instead go with the workqueue API. See Documentation/core-api/workqueue.rst and include/linux/workqueue.h. Thanks! Ezequiel > Signed-off-by: Yunfei Dong > --- > .../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 12 +++++++ > .../platform/mtk-vcodec/mtk_vcodec_drv.h | 7 ++++ > .../platform/mtk-vcodec/vdec_msg_queue.c | 32 +++++++++++++++++++ > .../platform/mtk-vcodec/vdec_msg_queue.h | 6 ++++ > 4 files changed, 57 insertions(+) > > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c > index e21e0c4bcd86..de83e3b821b4 100644 > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c > @@ -364,6 +364,18 @@ static int mtk_vcodec_probe(struct platform_device *pdev) > goto err_dec_pm; > } > > + if (VDEC_LAT_ARCH(dev->vdec_pdata->hw_arch)) { > + vdec_msg_queue_init_ctx(&dev->msg_queue_core_ctx, > + MTK_VDEC_CORE); > + dev->kthread_core = kthread_run(vdec_msg_queue_core_thead, dev, > + "mtk-%s", "core"); > + if (IS_ERR(dev->kthread_core)) { > + dev_err(&pdev->dev, "Failed to create core thread"); > + ret = PTR_ERR(dev->kthread_core); > + goto err_res; > + } > + } > + > for (i = 0; i < MTK_VDEC_HW_MAX; i++) > mutex_init(&dev->dec_mutex[i]); > spin_lock_init(&dev->irqlock); > diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h > index 9d072c082f73..68a9b1a2d3b3 100644 > --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h > +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_drv.h > @@ -27,6 +27,7 @@ > #define MTK_VCODEC_MAX_PLANES 3 > #define MTK_V4L2_BENCHMARK 0 > #define WAIT_INTR_TIMEOUT_MS 1000 > +#define VDEC_LAT_ARCH(hw_arch) ((hw_arch) >= MTK_VDEC_LAT_SINGLE_CORE) > > /* > * enum mtk_hw_reg_idx - MTK hw register base index > @@ -466,6 +467,9 @@ struct mtk_vcodec_enc_pdata { > * @comp_dev: component hardware device > * @component_node: component node > * > + * @kthread_core: thread used for core hardware decode > + * @msg_queue_core_ctx: msg queue context used for core thread > + * > * @hardware_bitmap: used to record hardware is ready or not > */ > struct mtk_vcodec_dev { > @@ -508,6 +512,9 @@ struct mtk_vcodec_dev { > void *comp_dev[MTK_VDEC_HW_MAX]; > struct device_node *component_node[MTK_VDEC_HW_MAX]; > > + struct task_struct *kthread_core; > + struct vdec_msg_queue_ctx msg_queue_core_ctx; > + > DECLARE_BITMAP(hardware_bitmap, MTK_VDEC_HW_MAX); > }; > > diff --git a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c > index d66ed98c79a9..665f571eab4b 100644 > --- a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c > +++ b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.c > @@ -256,3 +256,35 @@ void vdec_msg_queue_deinit( > kfree(lat_buf->private_data); > } > } > + > +int vdec_msg_queue_core_thead(void *data) > +{ > + struct mtk_vcodec_dev *dev = data; > + struct vdec_lat_buf *lat_buf; > + struct mtk_vcodec_ctx *ctx; > + > + set_freezable(); > + for (;;) { > + try_to_freeze(); > + if (kthread_should_stop()) > + break; > + > + lat_buf = vdec_msg_queue_dqbuf(&dev->msg_queue_core_ctx); > + if (!lat_buf) > + continue; > + > + ctx = lat_buf->ctx; > + mtk_vcodec_set_curr_ctx(dev, ctx, MTK_VDEC_CORE); > + > + if (!lat_buf->core_decode) > + mtk_v4l2_err("Core decode callback func is NULL"); > + else > + lat_buf->core_decode(lat_buf); > + > + mtk_vcodec_set_curr_ctx(dev, NULL, MTK_VDEC_CORE); > + vdec_msg_queue_qbuf(&ctx->msg_queue.lat_ctx, lat_buf); > + } > + > + mtk_v4l2_debug(3, "Video Capture Thread End"); > + return 0; > +} > diff --git a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h > index 1905ce713592..b5745b144140 100644 > --- a/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h > +++ b/drivers/media/platform/mtk-vcodec/vdec_msg_queue.h > @@ -148,4 +148,10 @@ void vdec_msg_queue_deinit( > struct vdec_msg_queue *msg_queue, > struct mtk_vcodec_ctx *ctx); > > +/** > + * vdec_msg_queue_core_thead - used for core decoder. > + * @data: private data used for each codec > + */ > +int vdec_msg_queue_core_thead(void *data); > + > #endif > -- > 2.25.1 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel