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Fri, 20 Dec 2019 12:01:42 +0000 (GMT) From: =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= To: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= , cw00.choi@samsung.com, myungjoo.ham@samsung.com, inki.dae@samsung.com, sw0312.kim@samsung.com, georgi.djakov@linaro.org, leonard.crestez@nxp.com, m.szyprowski@samsung.com, b.zolnierkie@samsung.com, krzk@kernel.org Subject: [RFC PATCH v3 3/7] interconnect: Allow inter-provider pairs to be configured Date: Fri, 20 Dec 2019 12:56:49 +0100 Message-Id: <20191220115653.6487-4-a.swigon@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191220115653.6487-1-a.swigon@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA02Se0hTYRjG+XZ2zi40OU2pF7tIg6ikK4V8lYiWxKGgyz8FhdXSk4s5jR0v WUGaaVMxZFKzaRdNUqalzgu2Sm2NRlSTZq2B2kyzYbSiVEgd1raT1X+/732f53veF14xIe8n I8Wn0jNZbboyTUFJhZ3Pph3rVnX5kzY6LRh7bhYi3FrZTOJ3k14S37I5SPxm6huFDY/NFNZ7 yoW4r69FhBuGvpPYPOoicb+lmsITZTaEK/u6BfiebUiEB/IbKFxZMU7F04zZVEwxg65HFOMp tQuYtroLTOvXLgFzpd2EmAnz8v2iw9LYFDbtVDar3RB3XKoq7C2iTt+JOPPTWk3moRa6BEnE QG+BmqYeKshyugFB4+XVPE8ieNe7twRJAzyBwOW6JJo3dLZ2iPhGPQJTswH9dRQ9lAaZohNA f3U4JIqgbQgqbn8TBh8EXS0AXXG9MKgKpw/BeM2XEAvplfD4SW1oDhmNoarVTfFxUdDY0ksE WUJvBfdbJ8FrFsLz6x9DXiKgKeioIoIBQE+JQFdrJ3lzIhhmRhDP4fDZ3v5nh6Xw68EtAc8c jD3wkLw5D4H5ro3gG9th0DETmEIcSFgDzZYNfDkBHK58UbAMdBi4fQv5GcJA32kg+LIMdEVy HhVguR7GGwEuNrr+/M1Apc2IytEK43/LGP9bxvgv9jYiTGgxm8VpUlluczqbs55Taris9NT1 yRkaMwqc2os5+1QX6vafsCJajBQLZPEnZ5PkpDKby9VYEYgJRYRsQDedJJelKHPPstqMY9qs NJazoiVioWKxbHPteJKcTlVmsmqWPc1q57sCsSQyD2V4o/w73QVl9w/cHRmJO+hz1znvvbZ9 6Xz5vHh3GErO8ZvWDvtKb/Rf23XuqPepZXSqeU/kud0bf8yu0nuzPlgPH6GSU+qqdLHl25ZJ nvWo7F/3VbXlNKli/D1qa7exfSCGXpDIjM3FIHX7q/evfQnRn87ueLLomM9xfjjaWaNmFEJO pdwUTWg55W8CpCNgZgMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrJIsWRmVeSWpSXmKPExsVy+t/xe7rqO/7EGrTvkrK4P6+V0WLjjPWs Fte/PGe1mH/kHKvFla/v2Sym793EZjHp/gQWi/PnN7BbrLj7kdVi0+NrrBaXd81hs/jce4TR Ysb5fUwWa4/cZbe43biCzWLG5JdsDgIem1Z1snncubaHzeN+93Emj81L6j02vtvB5NG3ZRWj x+dNcgHsUXo2RfmlJakKGfnFJbZK0YYWRnqGlhZ6RiaWeobG5rFWRqZK+nY2Kak5mWWpRfp2 CXoZrQfa2AoWi1T8ODSHtYFxg0AXIyeHhICJxLaNW9m7GLk4hASWMkocurOJESIhIfFx/Q1W CFtY4s+1LjaIok+MEn29S9hBEmwCjhKTpj4A6xYROMUosXX5OTaQBLPACiaJ/jnCXYwcHMIC oRIr25NAwiwCqhJ7Dy4CK+EVsJCYvfEGG8QCeYnVGw4wg9icApYSN65eArOFgGp2fu5jgqgX lDg58wkLyEhmAXWJ9fOEIDbJSzRvnc08gVFwFpKqWQhVs5BULWBkXsUoklpanJueW2ykV5yY W1yal66XnJ+7iREYrduO/dyyg7HrXfAhRgEORiUeXoe037FCrIllxZW5hxglOJiVRHhvd/yM FeJNSaysSi3Kjy8qzUktPsRoCvTaRGYp0eR8YCLJK4k3NDU0t7A0NDc2NzazUBLn7RA4GCMk kJ5YkpqdmlqQWgTTx8TBKdXA6KN24Oe94n9n305TaP6lvKi+e70Mm4/mpg/Z6guurRBk6eWb 9kfy0Zfej9bqX3M+z55i/HnVinK5O9rdD73LMz5m3T34PyQrhVFwaq2Um0vrq2sXXbIt1X8+ fXy+SfpFwp54mT+/tojcFejuejk5I6b1bbQFh/80e9Ed917fLXyWtORD301uQyWW4oxEQy3m ouJEAA8iFKbsAgAA X-CMS-MailID: 20191220120143eucas1p1c9b01ae8c2e4ecd70423ef9d8001536f X-Msg-Generator: CA X-RootMTR: 20191220120143eucas1p1c9b01ae8c2e4ecd70423ef9d8001536f X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20191220120143eucas1p1c9b01ae8c2e4ecd70423ef9d8001536f References: <20191220115653.6487-1-a.swigon@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org In the exynos-bus devfreq driver every bus is probed separately and is assigned a separate interconnect provider. However, the interconnect framework does not call the '->set' callback for pairs of nodes which belong to different providers. This patch adds support for a new boolean 'inter_set' field in struct icc_provider. Setting it to 'true' enables calling '->set' for inter-provider node pairs. All existing users of the interconnect framework allocate this structure with kzalloc, and are therefore unaffected. Signed-off-by: Artur Świgoń --- drivers/interconnect/core.c | 11 +++++------ include/linux/interconnect-provider.h | 2 ++ 2 files changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c index 74c68898a350..a28bd0f8a497 100644 --- a/drivers/interconnect/core.c +++ b/drivers/interconnect/core.c @@ -259,23 +259,22 @@ static int aggregate_requests(struct icc_node *node) static int apply_constraints(struct icc_path *path) { struct icc_node *next, *prev = NULL; + struct icc_provider *p; int ret = -EINVAL; int i; for (i = 0; i < path->num_nodes; i++) { next = path->reqs[i].node; + p = next->provider; - /* - * Both endpoints should be valid master-slave pairs of the - * same interconnect provider that will be configured. - */ - if (!prev || next->provider != prev->provider) { + /* both endpoints should be valid master-slave pairs */ + if (!prev || (p != prev->provider && !p->inter_set)) { prev = next; continue; } /* set the constraints */ - ret = next->provider->set(prev, next); + ret = p->set(prev, next); if (ret) goto out; diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h index cc965b8fab53..b6ae0ee686c5 100644 --- a/include/linux/interconnect-provider.h +++ b/include/linux/interconnect-provider.h @@ -41,6 +41,7 @@ struct icc_node *of_icc_xlate_onecell(struct of_phandle_args *spec, * @xlate: provider-specific callback for mapping nodes from phandle arguments * @dev: the device this interconnect provider belongs to * @users: count of active users + * @inter_set: whether inter-provider pairs will be configured with @set * @data: pointer to private data */ struct icc_provider { @@ -53,6 +54,7 @@ struct icc_provider { struct icc_node* (*xlate)(struct of_phandle_args *spec, void *data); struct device *dev; int users; + bool inter_set; void *data; };