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Message-ID: <2753c4b1-76e7-9acd-ca1c-62e6017ed971@collabora.com>
Date: Wed, 14 Jul 2021 10:28:46 +0200
From: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
To: Yong Wu <yong.wu@...iatek.com>,
Matthias Brugger <matthias.bgg@...il.com>,
Joerg Roedel <joro@...tes.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
David Airlie <airlied@...ux.ie>,
Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: Evan Green <evgreen@...omium.org>,
Robin Murphy <robin.murphy@....com>,
Tomasz Figa <tfiga@...omium.org>,
Will Deacon <will.deacon@....com>,
linux-mediatek@...ts.infradead.org, srv_heupstream@...iatek.com,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
iommu@...ts.linux-foundation.org, youlin.pei@...iatek.com,
Nicolas Boichat <drinkcat@...omium.org>,
Matthias Kaehlcke <mka@...omium.org>, anan.sun@...iatek.com,
ming-fan.chen@...iatek.com, yi.kuo@...iatek.com,
acourbot@...omium.org, linux-media@...r.kernel.org,
dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Xia Jiang <xia.jiang@...iatek.com>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Eizan Miyamoto <eizan@...omium.org>,
anthony.huang@...iatek.com, Rick Chang <rick.chang@...iatek.com>
Subject: Re: [PATCH v6 04/11] media: mtk-jpeg: Get rid of mtk_smi_larb_get/put
On 14.07.21 04:56, Yong Wu wrote:
> MediaTek IOMMU has already added device_link between the consumer
> and smi-larb device. If the jpg device call the pm_runtime_get_sync,
> the smi-larb's pm_runtime_get_sync also be called automatically.
>
> After removing the larb_get operations, then mtk_jpeg_clk_init is
> also unnecessary. Remove it too.
>
> CC: Rick Chang <rick.chang@...iatek.com>
> CC: Xia Jiang <xia.jiang@...iatek.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> Reviewed-by: Evan Green <evgreen@...omium.org>
> Acked-by: Rick Chang <rick.chang@...iatek.com>
Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
> ---
> .../media/platform/mtk-jpeg/mtk_jpeg_core.c | 45 +------------------
> .../media/platform/mtk-jpeg/mtk_jpeg_core.h | 2 -
> 2 files changed, 2 insertions(+), 45 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> index a89c7b206eef..4fea2c512434 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.c
> @@ -22,7 +22,6 @@
> #include <media/v4l2-ioctl.h>
> #include <media/videobuf2-core.h>
> #include <media/videobuf2-dma-contig.h>
> -#include <soc/mediatek/smi.h>
>
> #include "mtk_jpeg_enc_hw.h"
> #include "mtk_jpeg_dec_hw.h"
> @@ -1055,10 +1054,6 @@ static void mtk_jpeg_clk_on(struct mtk_jpeg_dev *jpeg)
> {
> int ret;
>
> - ret = mtk_smi_larb_get(jpeg->larb);
> - if (ret)
> - dev_err(jpeg->dev, "mtk_smi_larb_get larbvdec fail %d\n", ret);
> -
> ret = clk_bulk_prepare_enable(jpeg->variant->num_clks,
> jpeg->variant->clks);
> if (ret)
> @@ -1069,7 +1064,6 @@ static void mtk_jpeg_clk_off(struct mtk_jpeg_dev *jpeg)
> {
> clk_bulk_disable_unprepare(jpeg->variant->num_clks,
> jpeg->variant->clks);
> - mtk_smi_larb_put(jpeg->larb);
> }
>
> static irqreturn_t mtk_jpeg_enc_done(struct mtk_jpeg_dev *jpeg)
> @@ -1284,35 +1278,6 @@ static struct clk_bulk_data mtk_jpeg_clocks[] = {
> { .id = "jpgenc" },
> };
>
> -static int mtk_jpeg_clk_init(struct mtk_jpeg_dev *jpeg)
> -{
> - struct device_node *node;
> - struct platform_device *pdev;
> - int ret;
> -
> - node = of_parse_phandle(jpeg->dev->of_node, "mediatek,larb", 0);
> - if (!node)
> - return -EINVAL;
> - pdev = of_find_device_by_node(node);
> - if (WARN_ON(!pdev)) {
> - of_node_put(node);
> - return -EINVAL;
> - }
> - of_node_put(node);
> -
> - jpeg->larb = &pdev->dev;
> -
> - ret = devm_clk_bulk_get(jpeg->dev, jpeg->variant->num_clks,
> - jpeg->variant->clks);
> - if (ret) {
> - dev_err(&pdev->dev, "failed to get jpeg clock:%d\n", ret);
> - put_device(&pdev->dev);
> - return ret;
> - }
> -
> - return 0;
> -}
> -
> static void mtk_jpeg_job_timeout_work(struct work_struct *work)
> {
> struct mtk_jpeg_dev *jpeg = container_of(work, struct mtk_jpeg_dev,
> @@ -1333,11 +1298,6 @@ static void mtk_jpeg_job_timeout_work(struct work_struct *work)
> v4l2_m2m_job_finish(jpeg->m2m_dev, ctx->fh.m2m_ctx);
> }
>
> -static inline void mtk_jpeg_clk_release(struct mtk_jpeg_dev *jpeg)
> -{
> - put_device(jpeg->larb);
> -}
> -
> static int mtk_jpeg_probe(struct platform_device *pdev)
> {
> struct mtk_jpeg_dev *jpeg;
> @@ -1376,7 +1336,8 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
> goto err_req_irq;
> }
>
> - ret = mtk_jpeg_clk_init(jpeg);
> + ret = devm_clk_bulk_get(jpeg->dev, jpeg->variant->num_clks,
> + jpeg->variant->clks);
> if (ret) {
> dev_err(&pdev->dev, "Failed to init clk, err %d\n", ret);
> goto err_clk_init;
> @@ -1442,7 +1403,6 @@ static int mtk_jpeg_probe(struct platform_device *pdev)
> v4l2_device_unregister(&jpeg->v4l2_dev);
>
> err_dev_register:
> - mtk_jpeg_clk_release(jpeg);
>
> err_clk_init:
>
> @@ -1460,7 +1420,6 @@ static int mtk_jpeg_remove(struct platform_device *pdev)
> video_device_release(jpeg->vdev);
> v4l2_m2m_release(jpeg->m2m_dev);
> v4l2_device_unregister(&jpeg->v4l2_dev);
> - mtk_jpeg_clk_release(jpeg);
>
> return 0;
> }
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> index 595f7f10c9fd..3e4811a41ba2 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> @@ -85,7 +85,6 @@ struct mtk_jpeg_variant {
> * @alloc_ctx: videobuf2 memory allocator's context
> * @vdev: video device node for jpeg mem2mem mode
> * @reg_base: JPEG registers mapping
> - * @larb: SMI device
> * @job_timeout_work: IRQ timeout structure
> * @variant: driver variant to be used
> */
> @@ -99,7 +98,6 @@ struct mtk_jpeg_dev {
> void *alloc_ctx;
> struct video_device *vdev;
> void __iomem *reg_base;
> - struct device *larb;
> struct delayed_work job_timeout_work;
> const struct mtk_jpeg_variant *variant;
> };
>
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