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media: mtk-mdp: convert mtk_mdp_dev.comp array to list
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 Miyamoto <eizan@chromium.org> Reviewed-by: Enric Balletbo I Serra <enric.balletbo@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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@ -103,6 +103,7 @@ int mtk_mdp_comp_init(struct device *dev, struct device_node *node,
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return -EINVAL;
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}
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INIT_LIST_HEAD(&comp->node);
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comp->dev_node = of_node_get(node);
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comp->id = comp_id;
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comp->type = mtk_mdp_matches[comp_id].type;
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@ -36,6 +36,7 @@ enum mtk_mdp_comp_id {
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/**
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* struct mtk_mdp_comp - the MDP's function component data
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* @node: list node to track sibing MDP components
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* @dev_node: component device node
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* @clk: clocks required for component
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* @larb_dev: SMI device required for component
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@ -43,6 +44,7 @@ enum mtk_mdp_comp_id {
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* @id: component ID
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*/
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struct mtk_mdp_comp {
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struct list_head node;
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struct device_node *dev_node;
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struct clk *clk[2];
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struct device *larb_dev;
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@ -55,19 +55,19 @@ MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);
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static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
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{
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struct device *dev = &mdp->pdev->dev;
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int i;
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struct mtk_mdp_comp *comp_node;
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for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
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mtk_mdp_comp_clock_on(dev, mdp->comp[i]);
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list_for_each_entry(comp_node, &mdp->comp_list, node)
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mtk_mdp_comp_clock_on(dev, comp_node);
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}
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static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
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{
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struct device *dev = &mdp->pdev->dev;
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int i;
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struct mtk_mdp_comp *comp_node;
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for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
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mtk_mdp_comp_clock_off(dev, mdp->comp[i]);
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list_for_each_entry(comp_node, &mdp->comp_list, node)
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mtk_mdp_comp_clock_off(dev, comp_node);
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}
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static void mtk_mdp_wdt_worker(struct work_struct *work)
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@ -91,12 +91,25 @@ static void mtk_mdp_reset_handler(void *priv)
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queue_work(mdp->wdt_wq, &mdp->wdt_work);
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}
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void mtk_mdp_register_component(struct mtk_mdp_dev *mdp,
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struct mtk_mdp_comp *comp)
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{
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list_add(&mdp->comp_list, &comp->node);
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}
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void mtk_mdp_unregister_component(struct mtk_mdp_dev *mdp,
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struct mtk_mdp_comp *comp)
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{
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list_del(&comp->node);
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}
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static int mtk_mdp_probe(struct platform_device *pdev)
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{
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struct mtk_mdp_dev *mdp;
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struct device *dev = &pdev->dev;
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struct device_node *node, *parent;
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int i, ret = 0;
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struct mtk_mdp_comp *comp, *comp_temp;
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int ret = 0;
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mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
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if (!mdp)
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@ -104,6 +117,7 @@ static int mtk_mdp_probe(struct platform_device *pdev)
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mdp->id = pdev->id;
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mdp->pdev = pdev;
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INIT_LIST_HEAD(&mdp->comp_list);
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INIT_LIST_HEAD(&mdp->ctx_list);
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mutex_init(&mdp->lock);
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@ -124,7 +138,6 @@ static int mtk_mdp_probe(struct platform_device *pdev)
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const struct of_device_id *of_id;
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enum mtk_mdp_comp_type comp_type;
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int comp_id;
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struct mtk_mdp_comp *comp;
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of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
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if (!of_id)
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@ -150,13 +163,14 @@ static int mtk_mdp_probe(struct platform_device *pdev)
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of_node_put(node);
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goto err_comp;
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}
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mdp->comp[comp_id] = comp;
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ret = mtk_mdp_comp_init(dev, node, comp, comp_id);
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if (ret) {
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of_node_put(node);
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goto err_comp;
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}
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mtk_mdp_register_component(mdp, comp);
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}
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mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
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@ -220,8 +234,10 @@ err_alloc_wdt_wq:
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err_alloc_job_wq:
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err_comp:
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for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
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mtk_mdp_comp_deinit(dev, mdp->comp[i]);
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list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
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mtk_mdp_unregister_component(mdp, comp);
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mtk_mdp_comp_deinit(dev, comp);
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}
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dev_dbg(dev, "err %d\n", ret);
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return ret;
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@ -230,7 +246,7 @@ err_comp:
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static int mtk_mdp_remove(struct platform_device *pdev)
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{
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struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
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int i;
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struct mtk_mdp_comp *comp, *comp_temp;
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pm_runtime_disable(&pdev->dev);
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vb2_dma_contig_clear_max_seg_size(&pdev->dev);
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@ -243,8 +259,10 @@ static int mtk_mdp_remove(struct platform_device *pdev)
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flush_workqueue(mdp->job_wq);
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destroy_workqueue(mdp->job_wq);
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for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
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mtk_mdp_comp_deinit(&pdev->dev, mdp->comp[i]);
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list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
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mtk_mdp_unregister_component(mdp, comp);
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mtk_mdp_comp_deinit(&pdev->dev, comp);
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}
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dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
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return 0;
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@ -136,7 +136,7 @@ struct mtk_mdp_variant {
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* @pdev: pointer to the image processor platform device
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* @variant: the IP variant information
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* @id: image processor device index (0..MTK_MDP_MAX_DEVS)
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* @comp: MDP function components
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* @comp_list: list of MDP function components
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* @m2m_dev: v4l2 memory-to-memory device data
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* @ctx_list: list of struct mtk_mdp_ctx
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* @vdev: video device for image processor driver
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@ -154,7 +154,7 @@ struct mtk_mdp_dev {
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struct platform_device *pdev;
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struct mtk_mdp_variant *variant;
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u16 id;
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struct mtk_mdp_comp *comp[MTK_MDP_COMP_ID_MAX];
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struct list_head comp_list;
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struct v4l2_m2m_dev *m2m_dev;
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struct list_head ctx_list;
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struct video_device *vdev;
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@ -221,6 +221,12 @@ struct mtk_mdp_ctx {
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extern int mtk_mdp_dbg_level;
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void mtk_mdp_register_component(struct mtk_mdp_dev *mdp,
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struct mtk_mdp_comp *comp);
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void mtk_mdp_unregister_component(struct mtk_mdp_dev *mdp,
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struct mtk_mdp_comp *comp);
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#if defined(DEBUG)
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#define mtk_mdp_dbg(level, fmt, args...) \
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