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Thu, 07 May 2020 03:25:08 -0700 (PDT) From: Eizan Miyamoto To: LKML Subject: [PATCH v3 4/5] [media] mtk-mdp: convert mtk_mdp_dev.comp array to list Date: Thu, 7 May 2020 20:23:48 +1000 Message-Id: <20200507202337.v3.4.I22b7dfc5e6977f5c149f82594832b5bd1d978af9@changeid> X-Mailer: git-send-email 2.26.2.526.g744177e7f7-goog In-Reply-To: <20200507102345.81849-1-eizan@chromium.org> References: <20200507102345.81849-1-eizan@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200507_032511_701129_974225A7 X-CRM114-Status: GOOD ( 16.58 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:641 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrew-CT Chen , Minghsiu Tsai , Houlong Wei , Eizan Miyamoto , Matthias Brugger , Enric Balletbo I Serra , linux-mediatek@lists.infradead.org, Mauro Carvalho Chehab , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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 Reviewed-by: Enric Balletbo I Serra --- Changes in v3: None Changes in v2: None 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 c76cd61fb178..da2bdad7a8d1 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 17d155219ba2..40b9fda8b03b 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); @@ -220,8 +234,10 @@ 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; @@ -230,7 +246,7 @@ 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); @@ -243,8 +259,10 @@ 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 bafcccd71f31..1de825386da7 100644 --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.h +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.h @@ -138,7 +138,7 @@ 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 @@ -156,7 +156,7 @@ 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; @@ -223,6 +223,12 @@ 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...) \