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Wed, 07 Jul 2021 00:35:14 -0700 (PDT) From: Eizan Miyamoto To: linux-kernel@vger.kernel.org Cc: houlong.wei@mediatek.com, enric.balletbo@collabora.com, wenst@chromium.org, yong.wu@mediatek.com, chunkuang.hu@kernel.org, Eizan Miyamoto , Andrew-CT Chen , Matthias Brugger , Mauro Carvalho Chehab , Minghsiu Tsai , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org, linux-mediatek@lists.infradead.org Subject: [PATCH v4 6/8] media: mtk-mdp: propagate errors better in pm_suspend/resume Date: Wed, 7 Jul 2021 17:34:08 +1000 Message-Id: <20210707173108.v4.6.If7d6a147afd8880940c42d7998e47ed3869e8805@changeid> X-Mailer: git-send-email 2.32.0.93.g670b81a890-goog In-Reply-To: <20210707073410.999625-1-eizan@chromium.org> References: <20210707073410.999625-1-eizan@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210707_003515_591930_4D92438B X-CRM114-Status: GOOD ( 20.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Up until this change, many errors were logged but ignored when powering on clocks and calling pm_runtime_get/put() inside mtk_mdp_core. This change tries to do a better job at propagating errors back to the power management framework. Signed-off-by: Eizan Miyamoto --- (no changes since v1) drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 62 ++++++++++++++++--- drivers/media/platform/mtk-mdp/mtk_mdp_comp.h | 6 +- drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 57 +++++++++++++---- 3 files changed, 99 insertions(+), 26 deletions(-) diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c index 3d9bb7265159..59911ee063c1 100644 --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c @@ -53,39 +53,81 @@ static const struct of_device_id mtk_mdp_comp_driver_dt_match[] = { }; MODULE_DEVICE_TABLE(of, mtk_mdp_comp_driver_dt_match); -void mtk_mdp_comp_power_on(struct mtk_mdp_comp *comp) +int mtk_mdp_comp_power_on(struct mtk_mdp_comp *comp) { - int err; + int status, err; err = pm_runtime_get_sync(comp->dev); - if (err < 0) + if (err < 0) { dev_err(comp->dev, "failed to runtime get, err %d.\n", err); + return err; + } + + err = mtk_mdp_comp_clock_on(comp); + if (err) { + dev_err(comp->dev, "failed to turn on clock. err=%d", err); + status = err; + goto err_mtk_mdp_comp_clock_on; + } + + return err; + +err_mtk_mdp_comp_clock_on: + err = pm_runtime_put_sync(comp->dev); + if (err) + dev_err(comp->dev, "failed to runtime put in cleanup. err=%d", err); - mtk_mdp_comp_clock_on(comp); + return status; } -void mtk_mdp_comp_power_off(struct mtk_mdp_comp *comp) +int mtk_mdp_comp_power_off(struct mtk_mdp_comp *comp) { - int err; + int status, err; mtk_mdp_comp_clock_off(comp); err = pm_runtime_put_sync(comp->dev); - if (err < 0) + if (err < 0) { dev_err(comp->dev, "failed to runtime put, err %d.\n", err); + status = err; + goto err_pm_runtime_put_sync; + } + + return 0; + +err_pm_runtime_put_sync: + err = mtk_mdp_comp_clock_on(comp); + if (err) + dev_err(comp->dev, "failed to turn on clock in cleanup. err=%d", err); + + return status; } -void mtk_mdp_comp_clock_on(struct mtk_mdp_comp *comp) +int mtk_mdp_comp_clock_on(struct mtk_mdp_comp *comp) { - int i, err; + int i, err, status; for (i = 0; i < ARRAY_SIZE(comp->clk); i++) { if (IS_ERR(comp->clk[i])) continue; err = clk_prepare_enable(comp->clk[i]); - if (err) + if (err) { + status = err; dev_err(comp->dev, "failed to enable clock, err %d. i:%d\n", err, i); + goto err_clk_prepare_enable; + } + } + + return 0; + +err_clk_prepare_enable: + for (--i; i >= 0; i--) { + if (IS_ERR(comp->clk[i])) + continue; + clk_disable_unprepare(comp->clk[i]); } + + return status; } void mtk_mdp_comp_clock_off(struct mtk_mdp_comp *comp) diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h index 7ad9b06bb11b..2bd229cc7eae 100644 --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h @@ -21,10 +21,10 @@ struct mtk_mdp_comp { int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev); -void mtk_mdp_comp_power_on(struct mtk_mdp_comp *comp); -void mtk_mdp_comp_power_off(struct mtk_mdp_comp *comp); +int mtk_mdp_comp_power_on(struct mtk_mdp_comp *comp); +int mtk_mdp_comp_power_off(struct mtk_mdp_comp *comp); -void mtk_mdp_comp_clock_on(struct mtk_mdp_comp *comp); +int mtk_mdp_comp_clock_on(struct mtk_mdp_comp *comp); void mtk_mdp_comp_clock_off(struct mtk_mdp_comp *comp); extern struct platform_driver mtk_mdp_component_driver; diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c index 48e9a557c446..523e3c2798e1 100644 --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c @@ -49,8 +49,9 @@ static const struct of_device_id mtk_mdp_of_ids[] = { }; MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids); -static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp) +static int mtk_mdp_clock_on(struct mtk_mdp_dev *mdp) { + int err, status; struct mtk_mdp_comp *comp_node; /* @@ -58,18 +59,41 @@ static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp) * on it through mtk_mdp_m2m_start_streaming, making it unnecessary to * have mtk_mdp_comp_power_on called on it. */ - mtk_mdp_comp_clock_on(&mdp->comp_self); + err = mtk_mdp_comp_clock_on(&mdp->comp_self); + if (err) + return err; + + list_for_each_entry(comp_node, &mdp->comp_list, node) { + err = mtk_mdp_comp_power_on(comp_node); + if (err) { + status = err; + goto err_mtk_mdp_comp_power_on; + } + } - list_for_each_entry(comp_node, &mdp->comp_list, node) - mtk_mdp_comp_power_on(comp_node); + return 0; + +err_mtk_mdp_comp_power_on: + list_for_each_entry_continue_reverse(comp_node, &mdp->comp_list, node) { + err = mtk_mdp_comp_power_off(comp_node); + if (err) + dev_err(&mdp->pdev->dev, "failed to power off after error. err=%d", err); + } + return status; } -static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp) +static int mtk_mdp_clock_off(struct mtk_mdp_dev *mdp) { + int status, err; struct mtk_mdp_comp *comp_node; - list_for_each_entry(comp_node, &mdp->comp_list, node) - mtk_mdp_comp_power_off(comp_node); + list_for_each_entry(comp_node, &mdp->comp_list, node) { + err = mtk_mdp_comp_power_off(comp_node); + if (err) { + status = err; + goto err_mtk_mdp_comp_power_off; + } + } /* * The master / rdma0 component will have pm_runtime_put called @@ -77,6 +101,17 @@ static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp) * have mtk_mdp_comp_power_off called on it. */ mtk_mdp_comp_clock_off(&mdp->comp_self); + + return 0; + +err_mtk_mdp_comp_power_off: + list_for_each_entry_continue_reverse(comp_node, &mdp->comp_list, node) { + err = mtk_mdp_comp_power_on(comp_node); + if (err) + dev_err(&mdp->pdev->dev, "failed to power on after error. err=%d", err); + } + + return status; } static void mtk_mdp_wdt_worker(struct work_struct *work) @@ -317,18 +352,14 @@ static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev) { struct mtk_mdp_dev *mdp = dev_get_drvdata(dev); - mtk_mdp_clock_off(mdp); - - return 0; + return mtk_mdp_clock_off(mdp); } static int __maybe_unused mtk_mdp_pm_resume(struct device *dev) { struct mtk_mdp_dev *mdp = dev_get_drvdata(dev); - mtk_mdp_clock_on(mdp); - - return 0; + return mtk_mdp_clock_on(mdp); } static int __maybe_unused mtk_mdp_suspend(struct device *dev)