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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=INRLer8tPzqwikZ236RQ8wL9bG2r0gnyDywNRRQv8rU=; b=E70xV2k+NK/uiOEvL+dek1FmfMIubIH3PeymlziDG7hmWKSA0Gj9Wzlyz2ZU8qaV71 HqhZwNehWRk9G9eaVG9Njs61zr8hLHtoLE9zXa0mvcJqVKw0TgjGBXpFZowJUZtxIxaw 55TqR02bKPpjRh4oGWrN16xiDdZQIajJIyiWMUZTzCrIGDf0cVj2hiwtRi18oIxleVQB L1zLYCHgVuEPnJM64cDwE6K3bjy+z4Pdv2cHZPpcmE6h8zlZke5SxIJTFeMZSleBNIgO AEg2/BgkYaJwKTQqM+8iWkLTi2GGv826fNtjF+61nK/Fm6N9e/HYOEe6brrEjZlVvmXj s2VQ== X-Gm-Message-State: AGi0PuY2Gl1k7OqLd/+NRLTaAqkvnlemnYcjQCalSTsKH7tCHM9DwnC9 Gb8Rd3+tmhg0Xxo7B9ppxVNDBlPNJ3BBEB0ijHc= X-Google-Smtp-Source: APiQypLMchmj31m9xdDxa5B93JFCjjuKAEhOojWveGb5LGrE88JxteLJ6rRME83HrJApWyY8krLyAdTXPDN4iqrmBMU= X-Received: by 2002:ac8:4987:: with SMTP id f7mr9172888qtq.160.1588784824302; Wed, 06 May 2020 10:07:04 -0700 (PDT) MIME-Version: 1.0 References: <20200506084039.249977-1-eizan@chromium.org> <20200506184018.v2.2.I87cf35a058328c780bd3b8b2191209a5011b7016@changeid> In-Reply-To: <20200506184018.v2.2.I87cf35a058328c780bd3b8b2191209a5011b7016@changeid> From: Enric Balletbo Serra Date: Wed, 6 May 2020 19:06:52 +0200 Message-ID: Subject: Re: [PATCH v2 2/2] [media] mtk-mdp: use pm_runtime in MDP component driver To: Eizan Miyamoto X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200506_100708_837316_3CDCA601 X-CRM114-Status: GOOD ( 27.87 ) X-BeenThere: linux-mediatek@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 , LKML , Houlong Wei , "moderated list:ARM/Mediatek SoC support" , Matthias Brugger , Mauro Carvalho Chehab , Linux ARM , linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Hi Eizan, Thank you for the patch. Missatge de Eizan Miyamoto del dia dc., 6 de maig 2020 a les 10:42: > > Without this change, the MDP components are not fully integrated into > the runtime power management subsystem, and the MDP driver does not > work. > > For each of the component device drivers to be able to call > pm_runtime_get/put_sync() a pointer to the component's device struct > had to be added to struct mtk_mdp_comp, set by mtk_mdp_comp_init(). > > Note that the dev argument to mtk_mdp_comp_clock_on/off() has been > removed. Those functions used to be called from the "master" mdp driver > in mtk_mdp_core.c, but the component's device pointer no longer > corresponds to the mdp master device pointer, which is not the right > device to pass to pm_runtime_put/get_sync() which we had to add to get > the driver to work properly. > > Signed-off-by: Eizan Miyamoto > --- > > Changes in v2: Ah, I guess this change log corresponds to the first patch. > - remove empty mtk_mdp_comp_init > - update documentation for enum mtk_mdp_comp_type > - remove comma after last element of mtk_mdp_comp_driver_dt_match > > drivers/media/platform/mtk-mdp/mtk_mdp_comp.c | 22 ++++++++++++++----- > drivers/media/platform/mtk-mdp/mtk_mdp_comp.h | 6 +++-- > drivers/media/platform/mtk-mdp/mtk_mdp_core.c | 6 ++--- > 3 files changed, 23 insertions(+), 11 deletions(-) > > diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c > index 5b4d482df778..228c58f92c8c 100644 > --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c > +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.c > @@ -15,6 +15,7 @@ > #include > #include > #include > +#include > > #include "mtk_mdp_comp.h" > #include "mtk_mdp_core.h" > @@ -53,7 +54,7 @@ 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_clock_on(struct device *dev, struct mtk_mdp_comp *comp) > +void mtk_mdp_comp_clock_on(struct mtk_mdp_comp *comp) > { > int i, err; > > @@ -62,25 +63,31 @@ void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp) > if (err) { > enum mtk_mdp_comp_type comp_type = > (enum mtk_mdp_comp_type) > - of_device_get_match_data(dev); > - dev_err(dev, > + of_device_get_match_data(comp->dev); > + dev_err(comp->dev, > "failed to get larb, err %d. type:%d\n", > err, comp_type); > } > } > > + err = pm_runtime_get_sync(comp->dev); > + if (err < 0) > + dev_err(comp->dev, > + "failed to runtime get, err %d.\n", > + err); Should you really ignore this error? If that's the case I'd just call pm_runtime_get_sync() without adding the logic to just print an error message. > + > 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) > - dev_err(dev, > + dev_err(comp->dev, > "failed to enable clock, err %d. i:%d\n", > err, i); Although ignoring errors seems to be a common pattern in this file and I know you did not introduce this. > } > } > > -void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp) > +void mtk_mdp_comp_clock_off(struct mtk_mdp_comp *comp) > { > int i; > > @@ -92,6 +99,8 @@ void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp) > > if (comp->larb_dev) > mtk_smi_larb_put(comp->larb_dev); > + > + pm_runtime_put_sync(comp->dev); > } > > static int mtk_mdp_comp_bind(struct device *dev, struct device *master, > @@ -101,6 +110,7 @@ static int mtk_mdp_comp_bind(struct device *dev, struct device *master, > struct mtk_mdp_dev *mdp = data; > > mtk_mdp_register_component(mdp, comp); > + pm_runtime_enable(dev); > > return 0; > } > @@ -111,6 +121,7 @@ static void mtk_mdp_comp_unbind(struct device *dev, struct device *master, > struct mtk_mdp_dev *mdp = data; > struct mtk_mdp_comp *comp = dev_get_drvdata(dev); > > + pm_runtime_disable(dev); > mtk_mdp_unregister_component(mdp, comp); > } > > @@ -129,6 +140,7 @@ int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev) > (enum mtk_mdp_comp_type)of_device_get_match_data(dev); > > INIT_LIST_HEAD(&comp->node); > + comp->dev = dev; > > for (i = 0; i < ARRAY_SIZE(comp->clk); i++) { > comp->clk[i] = of_clk_get(node, i); > diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h > index b5a18fe567aa..de158d3712f6 100644 > --- a/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h > +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_comp.h > @@ -12,17 +12,19 @@ > * @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; > }; > > int mtk_mdp_comp_init(struct mtk_mdp_comp *comp, struct device *dev); > > -void mtk_mdp_comp_clock_on(struct device *dev, struct mtk_mdp_comp *comp); > -void mtk_mdp_comp_clock_off(struct device *dev, struct mtk_mdp_comp *comp); > +void 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 539a7942e3cb..133d107aa4e6 100644 > --- a/drivers/media/platform/mtk-mdp/mtk_mdp_core.c > +++ b/drivers/media/platform/mtk-mdp/mtk_mdp_core.c > @@ -52,20 +52,18 @@ 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; > struct mtk_mdp_comp *comp_node; > > list_for_each_entry(comp_node, &mdp->comp_list, node) > - mtk_mdp_comp_clock_on(dev, comp_node); > + mtk_mdp_comp_clock_on(comp_node); > } > > static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp) > { > - struct device *dev = &mdp->pdev->dev; > struct mtk_mdp_comp *comp_node; > > list_for_each_entry(comp_node, &mdp->comp_list, node) > - mtk_mdp_comp_clock_off(dev, comp_node); > + mtk_mdp_comp_clock_off(comp_node); > } > > static void mtk_mdp_wdt_worker(struct work_struct *work) > -- > 2.26.2.526.g744177e7f7-goog > > > _______________________________________________ > Linux-mediatek mailing list > Linux-mediatek@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-mediatek _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek