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Message-ID: <f8d2ecfa-d0e0-87ed-429a-cb2dfd4e0745@collabora.com>
Date: Wed, 14 Jul 2021 10:29:09 +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,
Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
Houlong Wei <houlong.wei@...iatek.com>
Subject: Re: [PATCH v6 05/11] media: mtk-mdp: Get rid of mtk_smi_larb_get/put
On 14.07.21 04:56, Yong Wu wrote:
> MediaTek IOMMU has already added the device_link between the consumer
> and smi-larb device. If the mdp device call the pm_runtime_get_sync,
> the smi-larb's pm_runtime_get_sync also be called automatically.
>
> CC: Minghsiu Tsai <minghsiu.tsai@...iatek.com>
> CC: Houlong Wei <houlong.wei@...iatek.com>
> Signed-off-by: Yong Wu <yong.wu@...iatek.com>
> Reviewed-by: Evan Green <evgreen@...omium.org>
> Reviewed-by: Houlong Wei <houlong.wei@...iatek.com>
Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@...labora.com>
> ---
> drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 46 +------------------
> drivers/media/platform/mtk-mdp/mtk_mdp_comp.h | 2 -
> drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 1 -
> 3 files changed, 1 insertion(+), 48 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> index de2d425efdd1..5e0ea83a9f7f 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> @@ -13,7 +13,6 @@
> #include <linux/of.h>
> #include <linux/of_irq.h>
> #include <linux/of_platform.h>
> -#include <soc/mediatek/smi.h>
> #include <linux/pm_runtime.h>
>
> #include "mtk_mdp_comp.h"
> @@ -57,13 +56,6 @@ int mtk_mdp_comp_power_on(struct mtk_mdp_comp *comp)
> {
> int status, err;
>
> - if (comp->larb_dev) {
> - err = mtk_smi_larb_get(comp->larb_dev);
> - if (err)
> - dev_err(comp->dev,
> - "failed to get larb, err %d.\n", err);
> - }
> -
> err = pm_runtime_get_sync(comp->dev);
> if (err < 0) {
> dev_err(comp->dev, "failed to runtime get, err %d.\n", err);
> @@ -146,9 +138,6 @@ void mtk_mdp_comp_clock_off(struct mtk_mdp_comp *comp)
> continue;
> clk_disable_unprepare(comp->clk[i]);
> }
> -
> - if (comp->larb_dev)
> - mtk_smi_larb_put(comp->larb_dev);
> }
>
> /*
> @@ -236,9 +225,6 @@ static const struct component_ops mtk_mdp_component_ops = {
>
> int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev)
> {
> - struct device_node *larb_node;
> - struct platform_device *larb_pdev;
> - int ret;
> int i;
> struct device_node *node = dev->of_node;
> enum mtk_mdp_comp_type comp_type =
> @@ -252,8 +238,7 @@ int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev)
> if (IS_ERR(comp->clk[i])) {
> if (PTR_ERR(comp->clk[i]) != -EPROBE_DEFER)
> dev_err(dev, "Failed to get clock\n");
> - ret = PTR_ERR(comp->clk[i]);
> - goto err;
> + return PTR_ERR(comp->clk[i]);
> }
>
> /* Only RDMA needs two clocks */
> @@ -261,36 +246,7 @@ int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev)
> break;
> }
>
> - /* Only DMA capable components need the LARB property */
> - comp->larb_dev = NULL;
> - if (comp_type != MTK_MDP_RDMA &&
> - comp_type != MTK_MDP_WDMA &&
> - comp_type != MTK_MDP_WROT)
> - return 0;
> -
> - larb_node = of_parse_phandle(node, "mediatek,larb", 0);
> - if (!larb_node) {
> - dev_err(dev,
> - "Missing mediadek,larb phandle in %pOF node\n", node);
> - ret = -EINVAL;
> - goto err;
> - }
> -
> - larb_pdev = of_find_device_by_node(larb_node);
> - if (!larb_pdev) {
> - dev_warn(dev, "Waiting for larb device %pOF\n", larb_node);
> - of_node_put(larb_node);
> - ret = -EPROBE_DEFER;
> - goto err;
> - }
> - of_node_put(larb_node);
> -
> - comp->larb_dev = &larb_pdev->dev;
> -
> return 0;
> -
> -err:
> - return ret;
> }
>
> static int mtk_mdp_comp_probe(struct platform_device *pdev)
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> index 5201c47f7baa..2bd229cc7eae 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> @@ -11,13 +11,11 @@
> * struct mtk_mdp_comp - the MDP's function component data
> * @node: list node to track sibing MDP components
> * @clk: clocks required for component
> - * @larb_dev: SMI device required for component
> * @dev: component's device
> */
> struct mtk_mdp_comp {
> struct list_head node;
> struct clk *clk[2];
> - struct device *larb_dev;
> struct device *dev;
> };
>
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> index e1fb39231248..be7d35b3e3ff 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> @@ -18,7 +18,6 @@
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/workqueue.h>
> -#include <soc/mediatek/smi.h>
>
> #include "mtk_mdp_comp.h"
> #include "mtk_mdp_core.h"
>
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