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Date: Tue, 5 May 2020 23:45:55 +0200
From: Enric Balletbo Serra <eballetbo@...il.com>
To: Eizan Miyamoto <eizan@...omium.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
Houlong Wei <houlong.wei@...iatek.com>,
Eizan Miyamoto <eizan@...gle.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@...ts.infradead.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
linux-media@...r.kernel.org
Subject: Re: [PATCH v1 4/5] [media] mtk-mdp: convert mtk_mdp_dev.comp array to list
Hi Eizan,
Thank you for your patch.
Missatge de Eizan Miyamoto <eizan@...omium.org> del dia dt., 5 de maig
2020 a les 6:02:
>
> The functions mtk_mdp_register/unregister_component have been created to
> add / remove items from the list of components.
>
> This will eventually enable us to specify a list of components in the
> device tree instead of hardcoding them into this driver.
>
> The list is modified by a single thread at driver probe time, and will
> not be traversed by another thread until the call to pm_runtime_enable
> at the end of probing.
>
> Signed-off-by: eizan@...omium.org
> Signed-off-by: Eizan Miyamoto <eizan@...gle.com>
Ditto. Other than that.
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
>
> drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 1 +
> drivers/media/platform/mtk-mdp/mtk_mdp_comp.h | 2 +
> drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 46 +++++++++++++------
> drivers/media/platform/mtk-mdp/mtk_mdp_core.h | 10 +++-
> 4 files changed, 43 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> index facc6104b91f..d4afed1363d5 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c
> @@ -103,6 +103,7 @@ int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
> return -EINVAL;
> }
>
> + INIT_LIST_HEAD(&comp->node);
> comp->dev_node = of_node_get(node);
> comp->id = comp_id;
> comp->type = mtk_mdp_matches[comp_id].type;
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> index 3b83bd6e0d8b..1f745891c6c3 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h
> @@ -36,6 +36,7 @@ enum mtk_mdp_comp_id {
>
> /**
> * struct mtk_mdp_comp - the MDP's function component data
> + * @node: list node to track sibing MDP components
> * @dev_node: component device node
> * @clk: clocks required for component
> * @larb_dev: SMI device required for component
> @@ -43,6 +44,7 @@ enum mtk_mdp_comp_id {
> * @id: component ID
> */
> struct mtk_mdp_comp {
> + struct list_head node;
> struct device_node *dev_node;
> struct clk *clk[2];
> struct device *larb_dev;
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> index f974242663dc..e6e702d9cb69 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c
> @@ -55,19 +55,19 @@ MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);
> static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
> {
> struct device *dev = &mdp->pdev->dev;
> - int i;
> + struct mtk_mdp_comp *comp_node;
>
> - for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
> - mtk_mdp_comp_clock_on(dev, mdp->comp[i]);
> + list_for_each_entry(comp_node, &mdp->comp_list, node)
> + mtk_mdp_comp_clock_on(dev, comp_node);
> }
>
> static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
> {
> struct device *dev = &mdp->pdev->dev;
> - int i;
> + struct mtk_mdp_comp *comp_node;
>
> - for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
> - mtk_mdp_comp_clock_off(dev, mdp->comp[i]);
> + list_for_each_entry(comp_node, &mdp->comp_list, node)
> + mtk_mdp_comp_clock_off(dev, comp_node);
> }
>
> static void mtk_mdp_wdt_worker(struct work_struct *work)
> @@ -91,12 +91,25 @@ static void mtk_mdp_reset_handler(void *priv)
> queue_work(mdp->wdt_wq, &mdp->wdt_work);
> }
>
> +void mtk_mdp_register_component(struct mtk_mdp_dev *mdp,
> + struct mtk_mdp_comp *comp)
> +{
> + list_add(&mdp->comp_list, &comp->node);
> +}
> +
> +void mtk_mdp_unregister_component(struct mtk_mdp_dev *mdp,
> + struct mtk_mdp_comp *comp)
> +{
> + list_del(&comp->node);
> +}
> +
> static int mtk_mdp_probe(struct platform_device *pdev)
> {
> struct mtk_mdp_dev *mdp;
> struct device *dev = &pdev->dev;
> struct device_node *node, *parent;
> - int i, ret = 0;
> + struct mtk_mdp_comp *comp, *comp_temp;
> + int ret = 0;
>
> mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
> if (!mdp)
> @@ -104,6 +117,7 @@ static int mtk_mdp_probe(struct platform_device *pdev)
>
> mdp->id = pdev->id;
> mdp->pdev = pdev;
> + INIT_LIST_HEAD(&mdp->comp_list);
> INIT_LIST_HEAD(&mdp->ctx_list);
>
> mutex_init(&mdp->lock);
> @@ -124,7 +138,6 @@ static int mtk_mdp_probe(struct platform_device *pdev)
> const struct of_device_id *of_id;
> enum mtk_mdp_comp_type comp_type;
> int comp_id;
> - struct mtk_mdp_comp *comp;
>
> of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
> if (!of_id)
> @@ -150,13 +163,14 @@ static int mtk_mdp_probe(struct platform_device *pdev)
> of_node_put(node);
> goto err_comp;
> }
> - mdp->comp[comp_id] = comp;
>
> ret = mtk_mdp_comp_init(dev, node, comp, comp_id);
> if (ret) {
> of_node_put(node);
> goto err_comp;
> }
> +
> + mtk_mdp_register_component(mdp, comp);
> }
>
> mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
> @@ -224,8 +238,10 @@ static int mtk_mdp_probe(struct platform_device *pdev)
> err_alloc_job_wq:
>
> err_comp:
> - for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
> - mtk_mdp_comp_deinit(dev, mdp->comp[i]);
> + list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
> + mtk_mdp_unregister_component(mdp, comp);
> + mtk_mdp_comp_deinit(dev, comp);
> + }
>
> dev_dbg(dev, "err %d\n", ret);
> return ret;
> @@ -234,7 +250,7 @@ static int mtk_mdp_probe(struct platform_device *pdev)
> static int mtk_mdp_remove(struct platform_device *pdev)
> {
> struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
> - int i;
> + struct mtk_mdp_comp *comp, *comp_temp;
>
> pm_runtime_disable(&pdev->dev);
> vb2_dma_contig_clear_max_seg_size(&pdev->dev);
> @@ -247,8 +263,10 @@ static int mtk_mdp_remove(struct platform_device *pdev)
> flush_workqueue(mdp->job_wq);
> destroy_workqueue(mdp->job_wq);
>
> - for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
> - mtk_mdp_comp_deinit(&pdev->dev, mdp->comp[i]);
> + list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
> + mtk_mdp_unregister_component(mdp, comp);
> + mtk_mdp_comp_deinit(&pdev->dev, comp);
> + }
>
> dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
> return 0;
> diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.h b/drivers/media/platform/mtk-mdp/mtk_mdp_core.h
> index dd130cc218c9..a7da14b97077 100644
> --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.h
> +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.h
> @@ -136,7 +136,7 @@ struct mtk_mdp_variant {
> * @pdev: pointer to the image processor platform device
> * @variant: the IP variant information
> * @id: image processor device index (0..MTK_MDP_MAX_DEVS)
> - * @comp: MDP function components
> + * @comp_list: list of MDP function components
> * @m2m_dev: v4l2 memory-to-memory device data
> * @ctx_list: list of struct mtk_mdp_ctx
> * @vdev: video device for image processor driver
> @@ -154,7 +154,7 @@ struct mtk_mdp_dev {
> struct platform_device *pdev;
> struct mtk_mdp_variant *variant;
> u16 id;
> - struct mtk_mdp_comp *comp[MTK_MDP_COMP_ID_MAX];
> + struct list_head comp_list;
> struct v4l2_m2m_dev *m2m_dev;
> struct list_head ctx_list;
> struct video_device *vdev;
> @@ -221,6 +221,12 @@ struct mtk_mdp_ctx {
>
> extern int mtk_mdp_dbg_level;
>
> +void mtk_mdp_register_component(struct mtk_mdp_dev *mdp,
> + struct mtk_mdp_comp *comp);
> +
> +void mtk_mdp_unregister_component(struct mtk_mdp_dev *mdp,
> + struct mtk_mdp_comp *comp);
> +
> #if defined(DEBUG)
>
> #define mtk_mdp_dbg(level, fmt, args...) \
> --
> 2.26.2.526.g744177e7f7-goog
>
>
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek
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